CN112419958A - Multi-frequency linkage low-power-consumption display driving method and system - Google Patents
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
Abstract
The invention provides a multi-frequency linkage low-power-consumption display driving method and system, and relates to the technical field of display. A multi-frequency linkage low-power-consumption display driving method comprises the following steps: acquiring display parameters before processing two adjacent frames; comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold; and when the absolute value of the difference of the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, adopting a first driving frequency parameter as display. The display effect can be balanced and considered, and meanwhile, the power consumption is reduced; the drive IC is internally provided with the optimal codes with different frame frequencies to dynamically select the refresh frequency of the display screen, and can conveniently, quickly and directly call the corresponding drive codes in the corresponding mode. In addition, the invention also provides a multi-frequency linkage low-power consumption display driving system, which comprises: the device comprises an acquisition module, a comparison module and a display module.
Description
Technical Field
The invention relates to the technical field of display, in particular to a multi-frequency linkage low-power-consumption display driving method and system.
Background
In general, the frame frequency is set to 1HZ or less in low-frequency driving, and in some cases, in order to reduce the power consumption of the display panel, the frame frequency is set to 1/4HZ and display scanning driving is performed, or even lower. However, products with low requirements for updating pictures corresponding to low-frequency display do not have problems, such as electronic price tags, temperature and humidity meters and the like, but for products with multiple functions, such as interphones, sports watches and the like, the problems of display lag and the like caused by low refreshing cannot meet the requirements in some application modes.
Disclosure of Invention
The invention aims to provide a multi-frequency linkage low-power-consumption display driving method which can balance the display effect and reduce the power consumption; the drive IC is internally provided with the optimal codes with different frame frequencies to dynamically select the refresh frequency of the display screen, and can conveniently, quickly and directly call the corresponding drive codes in the corresponding mode.
Another objective of the present invention is to provide a multi-frequency-linked low-power display driving system, which is capable of operating a multi-frequency-linked low-power display driving method.
The embodiment of the invention is realized by the following steps:
in a first aspect, an embodiment of the present application provides a multi-frequency-linked low-power-consumption display driving method, which includes acquiring display parameters of two adjacent frames before processing; comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold; and when the absolute value of the difference of the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, adopting a first driving frequency parameter as display.
In some embodiments of the present invention, the method further includes using a second driving frequency parameter as the display when an absolute value of a difference between the display parameters of two adjacent frames at the same position is between a first preset threshold and a second preset threshold.
In some embodiments of the present invention, before the acquiring the display parameters before the processing of two adjacent frames, the method further includes: and programming display frequency and corresponding voltage GAMMA parameters required by multiple modes into a display screen drive IC.
In some embodiments of the present invention, the method further comprises setting preset codes with different frame rates in the display driver IC.
In some embodiments of the present invention, the above further includes keeping the driving frequency unchanged when the display parameter before the processing of acquiring two adjacent frames is unchanged.
In some embodiments of the present invention, before the acquiring the display parameters before the processing of two adjacent frames, the method includes: and acquiring the gray scale of each pixel in the pixel matrix of the pre-output picture.
In some embodiments of the present invention, the method further includes determining a refresh type and a corresponding refresh frequency of the pre-output frame according to a gray scale of each pixel in the pixel matrix, where the refresh type includes a single frequency refresh and a multi-frequency refresh.
In some embodiments of the present invention, the above includes performing pixel voltage refreshing on the pixel matrix at a certain one refresh frequency under single frequency refresh, and performing pixel voltage refreshing on the pixel matrix at a certain plurality of refresh frequencies under multi-frequency refresh.
In a second aspect, an embodiment of the present application provides a multi-frequency-linked low-power-consumption display driving system, which includes an obtaining module, configured to obtain display parameters of two adjacent frames before processing; the comparison module is used for comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold; and the display module is used for adopting the first driving frequency parameter as display when the absolute value of the difference of the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold value.
In some embodiments of the present invention, the display device further includes a standby display module, configured to adopt the second driving frequency parameter as a display when an absolute value of a difference between the display parameters of two adjacent frames at the same position is between a first preset threshold and a second preset threshold.
In some embodiments of the present invention, the display device further includes a burning module for burning the display frequency and the corresponding voltage GAMMA parameter required by the multiple modes into the display screen driver IC.
In some embodiments of the invention, the above includes at least one memory for storing computer instructions; at least one processor in communication with the memory, wherein the at least one processor, when executing the computer instructions, causes the system to perform: the device comprises an acquisition module, a comparison module and a display module.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
1. the display effect is balanced and considered, and meanwhile, the power consumption is reduced;
2. the drive IC is internally provided with optimal codes with different frame frequencies;
3. the refreshing frequency of the display screen is dynamically selected, and the corresponding driving codes can be conveniently, quickly and directly called in the corresponding mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart illustrating steps of a multi-frequency-linked low-power-consumption display driving method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating detailed steps of a multi-frequency-linked low-power-consumption display driving method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a multi-frequency-linked low-power-consumption display driving system module according to an embodiment of the present invention.
Icon: 10-an acquisition module; 20-an alignment module; 30-display module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Example 1
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a multi-frequency-linked low-power-consumption display driving method according to an embodiment of the present invention, which is shown as follows:
step S100, burning display frequency and corresponding voltage GAMMA parameters required by multiple modes into a display screen drive IC;
step S110, setting preset codes with different frame frequencies in the display screen drive IC;
step S120, when the display parameters before the two adjacent frames are acquired are not changed, keeping the driving frequency unchanged;
step S130, acquiring display parameters before processing two adjacent frames;
step S140, comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold;
step S150, when the absolute value of the difference between the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, a first driving frequency parameter is adopted for display;
step S160, when the absolute value of the difference between the display parameters of two adjacent frames at the same position is between the first preset threshold and the second preset threshold, the second driving frequency parameter is used for displaying.
In some embodiments, corresponding display mode calling is performed on products with various mode requirements, and since different voltages and Gamma curves of a TFT display screen correspond to each other without refreshing frequency, a driver IC needs to add multiple sets of parameter burning and recording functions, how many display modes need to be determined together with a terminal customer before a display module leaves a factory, and display frequency and corresponding voltage GAMMA parameters needed by the corresponding modes are burned into the display screen driver IC for calling of a customer host.
Taking a sports watch as an example, when the sports watch is in a standby state, the sports watch only needs to display simple date and current time information, for example, 11 months, 20 days and 11 hours, 02 minutes in 2020; twenty days of two zero two-zero-year november and twenty days of one tenth and two minutes; 1HZ, 1/4HZ, 1/8HZ and the like can be directly called, and even lower driving frequency parameters are displayed; when the host computer enters a map display mode, display modes such as 8HZ, 16HZ and 24HZ can be started, so that the data can be updated timely; in the GPS positioning mode, the display modes such as 8HZ, 16HZ, 24HZ and the like can be started, so that the data can be ensured to be updated timely; when entering a stopwatch and the like which need to be refreshed quickly, the fast refreshing modes of 60HZ, 120HZ and the like can be started, and the requirement of a client for refreshing display quickly is met.
The parameters of the whole process are the parameters of the display module 30 which are debugged and burned before the factory, and the customer only needs to make a calling action when starting the corresponding mode.
Acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; wherein the original display parameters are obtained from an original display signal directly from the display signal source, and the modified display parameters are obtained from a processed modified display signal. In order to save the buffer space, only the original display parameters and the modified display parameters of the whole display picture of the current frame and the previous frame can be temporarily stored, and the buffered original display parameters and the modified display parameters are continuously updated in a covering manner along with the display.
And judging whether the displayed picture is a static picture or not by determining the change condition of the original display parameters of two adjacent frames at the same position. Specifically, the absolute value of the difference between the original display parameters at each position in two adjacent frames and a first preset threshold value can be respectively compared to ensure the accuracy of judgment; or a certain number of typical positions or random positions are selected from the display picture for comparison, so that the comparison process is simplified, and the processing efficiency is improved. When the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to the first preset threshold, specifically, the absolute value of the difference between all the compared original display parameters may be less than or equal to the first preset threshold; or, in consideration of possible fluctuation, when the absolute value of the difference between a certain number of or more original display parameters is less than or equal to the first preset threshold, the current picture is considered to be a still picture. It should be noted that the static picture is not strictly constant, but the picture with small change can be classified into the static picture. When the static picture is displayed, the absolute value of the difference of the corrected display parameters of the two adjacent frames at the corresponding positions is further compared with a second preset threshold value so as to judge whether the difference of the display parameters of the two adjacent frames is enlarged in the processing process of the original display signal. The corresponding position may be completely consistent with the position selected when the change condition of the original display parameter is judged, or may not be consistent with the position selected when the change condition of the original display parameter is judged, but it should be noted that the corrected display parameters of two adjacent frames are necessarily at the same position, so that the corrected display parameters are comparable. Similarly, the corrected display parameters at each position may be compared, or a number of representative positions or random positions may be selected for comparison.
When the absolute value of the difference between the display parameters of two adjacent frames at the same position is between the first preset threshold and the second preset threshold, the second driving frequency parameter is used for displaying, specifically, when the host switches from the standby state to the stopwatch display state, the predetermined first driving frequency parameter is adjusted to the second driving frequency parameter, for example, the driving frequency of 1HZ is adjusted to 60HZ, so as to ensure the requirement of the client for fast refreshing the display.
Example 2
Referring to fig. 2, fig. 2 is a flowchart illustrating detailed steps of a multi-frequency-linked low-power-consumption display driving method according to an embodiment of the present invention, which is as follows:
step S200, obtaining the gray scale of each pixel in the pixel matrix of the pre-output picture;
step S210, determining a refresh type and a corresponding refresh frequency of a pre-output picture according to the gray scale of each pixel in a pixel matrix, wherein the refresh type comprises single-frequency refresh and multi-frequency refresh;
step S220, judging whether the gray scales of each pixel in the pixel matrix are in the same gray scale gear, wherein the gray scale gear comprises a plurality of gray scales;
step S230, if the gray scale of each pixel in the pixel matrix is in the same gray scale gear, determining that the refresh type of the pre-output picture is the single-frequency refresh, and taking the refresh frequency corresponding to the same gray scale gear as the refresh frequency of the pre-output picture;
step S240, if the gray scales of a plurality of pixels in the pixel matrix are in at least two different gray scale gears, determining the refresh type of the pre-output picture as multi-frequency refresh, and determining a plurality of refresh frequencies of the pre-output picture according to the gray scale of each pixel;
step S250, performing pixel voltage refreshing on the pixel matrix at a determined one refresh frequency under single-frequency refresh, and performing pixel voltage refreshing on the pixel matrix at a plurality of determined refresh frequencies under multi-frequency refresh.
In some embodiments, when the display device displays a static picture or the display device is in a self-refresh mode, a gray scale of each pixel in a pixel matrix of a pre-output picture of the display device is obtained. That is to say, when the TCON can output a specific picture (for example, a standby picture of a notebook), a static picture (for an electronic book, an electronic photo frame application), or the display device enters a self-refresh mode, the TCON can acquire a gray scale of each pixel in a pre-output picture of the display device, determine at least one characteristic gray scale, and refresh the pixel voltage differentially at different refresh frequencies according to a gray scale level to which each characteristic gray scale belongs.
According to one embodiment of the present invention, each of the plurality of pixels includes a switching transistor controlling the pixel to perform voltage refresh, a gate of the switching transistor is connected to the gate driving circuit, and a source of the switching transistor is connected to the source driving circuit, wherein the refresh may be performed by the gate driving circuit or the refresh may be performed by the source driving circuit.
Specifically, when the output of the row or frame is controlled by using a Gate driver circuit such as a Gate driver IC (Gate on Array) or a GOA (Gate on Array), the frame or row with different gray scales can be refreshed at different refresh frequencies according to the displayed picture. When the Source driver circuit such as Source IC (Source driver IC) is used to control the output, the frames, rows or pixels with different gray scales can be refreshed at different refresh frequencies according to the displayed picture.
According to an embodiment of the present invention, determining a refresh type and a corresponding refresh frequency of a pre-output frame according to a gray scale of each pixel in a pixel matrix includes: judging whether the gray scales of each pixel in the pixel matrix are in the same gray scale gear, wherein the gray scale gear comprises a plurality of gray scales; and if the gray scale of each pixel in the pixel matrix is in the same gray scale gear, determining the refresh type of the pre-output picture as single-frequency refresh, and taking the refresh frequency corresponding to the same gray scale gear as the refresh frequency of the pre-output picture.
That is to say, it can be determined whether the gray scale information of the pixels of the pre-output picture is distributed in the same gray scale range, and if so, the pre-output picture is entirely refreshed by using the refresh frequency applicable to the gray scale range.
For example, when refreshing is performed through a gate driving circuit or a source driving circuit, if gray scales of a plurality of pixels in a pixel matrix are all in a maximum gray scale position, a refreshing frequency corresponding to the maximum gray scale position is used as a refreshing frequency of a pre-output picture, and pixel voltage refreshing is performed on the plurality of pixels according to the refreshing frequency of the pre-output picture; if the gray scales of the pixels are all 0 gray scale, taking a preset minimum refreshing frequency, namely a refreshing frequency corresponding to a maximum gray scale gear, as a refreshing frequency of the pre-output picture, and refreshing the pixel voltage of the pixels according to the refreshing frequency of the pre-output picture; and if the gray scales of the plurality of pixels only comprise 0 gray scale and 255 gray scale, taking a preset minimum refreshing frequency, namely a refreshing frequency corresponding to the maximum gray scale gear as a refreshing frequency of the pre-output picture, and refreshing the pixel voltage of the plurality of pixels according to the refreshing frequency of the pre-output picture.
Example 3
Referring to fig. 3, fig. 3 is a schematic diagram of a multi-frequency-linked low-power-consumption display driving system module according to an embodiment of the present invention, which is as follows:
the acquiring module 10 is used for acquiring display parameters before processing two adjacent frames;
a comparison module 20, configured to compare an absolute value of a difference between the display parameters of two adjacent frames at the same position with a first preset threshold;
the display module 30 is configured to use the first driving frequency parameter as a display when an absolute value of a difference between the display parameters of two adjacent frames at the same position is smaller than or equal to a first preset threshold.
Also included are a memory, a processor, and a communication interface, which are electrically connected, directly or indirectly, to each other to enable transmission or interaction of data. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory may be used to store software programs and modules, and the processor may execute various functional applications and data processing by executing the software programs and modules stored in the memory. The communication interface may be used for communicating signaling or data with other node devices.
The Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
The processor may be an integrated circuit chip having signal processing capabilities. The Processor may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), etc.; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
It will be appreciated that the configuration shown in fig. 3 is merely illustrative and may include more or fewer components than shown in fig. 3, or have a different configuration than shown in fig. 3. The components shown in fig. 3 may be implemented in hardware, software, or a combination thereof.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In summary, the multi-frequency-linked low-power-consumption display driving method and system provided by the embodiment of the application can balance the display effect and reduce the power consumption; the drive IC is internally provided with optimal codes with different frame frequencies; the refreshing frequency of the display screen is dynamically selected, and the corresponding driving codes can be conveniently, quickly and directly called in the corresponding mode.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A multi-frequency linkage low-power consumption display driving method is characterized by comprising the following steps:
acquiring display parameters before processing two adjacent frames;
comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold;
and when the absolute value of the difference of the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, adopting a first driving frequency parameter as display.
2. The multi-frequency coordinated low-power display driving method according to claim 1, further comprising:
and when the absolute value of the difference of the display parameters of two adjacent frames at the same position is between the first preset threshold and the second preset threshold, adopting the second driving frequency parameter as the display.
3. The method as claimed in claim 1, further comprising, before said obtaining the display parameters before processing two adjacent frames:
and programming display frequency and corresponding voltage GAMMA parameters required by multiple modes into a display screen drive IC.
4. The multi-frequency coordinated low-power display driving method according to claim 3, further comprising:
preset codes with different frame frequencies are arranged in the display screen drive IC.
5. The multi-frequency coordinated low-power display driving method according to claim 1, further comprising:
and when the display parameters before the processing of two adjacent frames are acquired are not changed, keeping the driving frequency unchanged.
6. The method as claimed in claim 1, wherein before said obtaining the display parameters before processing two adjacent frames, the method comprises:
acquiring the gray scale of each pixel in a pixel matrix of a pre-output picture;
determining a refresh type and a corresponding refresh frequency of a pre-output picture according to the gray scale of each pixel in a pixel matrix, wherein the refresh type comprises single-frequency refresh and multi-frequency refresh;
the method comprises the steps of refreshing pixel voltages of a pixel matrix at a certain refreshing frequency under single-frequency refreshing, and refreshing the pixel voltages of the pixel matrix at a plurality of certain refreshing frequencies under multi-frequency refreshing.
7. A multi-frequency linked low-power display driving system, comprising:
the acquisition module is used for acquiring display parameters before two adjacent frames are processed;
the comparison module is used for comparing the absolute value of the difference between the display parameters of two adjacent frames at the same position with a first preset threshold;
and the display module is used for adopting the first driving frequency parameter as display when the absolute value of the difference of the display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold value.
8. The multi-frequency coordinated low power consumption display driving system according to claim 7, further comprising:
and the standby display module is used for adopting the second driving frequency parameter as display when the absolute value of the difference of the display parameters of two adjacent frames at the same position is between the first preset threshold and the second preset threshold.
9. The multi-frequency coordinated low power consumption display driving system according to claim 7, further comprising:
and the burning module is used for burning the display frequency and the corresponding voltage GAMMA parameter required by the multiple modes into the display screen drive IC.
10. The multi-frequency coordinated low power consumption display driving system according to claim 7, comprising:
at least one memory for storing computer instructions;
at least one processor in communication with the memory, wherein the at least one processor, when executing the computer instructions, causes the system to perform: the device comprises an acquisition module, a comparison module and a display module.
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