WO2019184660A1 - Screen brightness calibration method, device and system, and computer-readable storage medium - Google Patents

Abstract

A screen brightness calibration method, device and system, and a computer-readable storage medium. The screen brightness calibration method comprises: adjusting backlight current values corresponding to brightness levels so that the screen brightness becomes the calibrated brightness corresponding to the brightness level. The calibration method avoids subjectivity, and therefore has a minor error and high efficiency.

Description

Screen brightness calibration method, device and system, computer readable storage medium Technical field

The present disclosure relates to electronic technologies, and more particularly to a screen brightness calibration method, apparatus and system, and computer readable storage medium.

Background technique

The brightness of the display screen is an important parameter of the display screen. The evaluation criteria of the display screen of the smart terminal, the television, etc. all have requirements for display brightness.

In the related art, a set of typical values and a set of minimum values are specified for the brightness of the terminal display. For example, for a 5-inch terminal screen, when the terminal screen is the brightest, the screen brightness is not less than 400 cd/m2, and when the terminal screen is the darkest, the screen brightness is not higher than 10 cd/m2. Therefore, the brightness of the terminal display screen is considered to be good as long as it is not lower than the prescribed value. For example, the display brightness distribution range of the same batch is between 400 cd/m2 and 500 cd/m2. This is because the brightness of the backlight used in the display is not uniform, and the brightness of different terminal displays cannot be consistent. Therefore, when multiple display screens are used for splicing, the brightness between the multiple screens is inconsistent, which affects the display effect. The usual method is to use a visual display to select a display with a close brightness to splicing to prompt the display effect. This method is subjective and inefficient.

Summary of the invention

At least one embodiment of the present disclosure provides a screen brightness calibration method, apparatus, and system, and a computer readable storage medium, such that screen brightness is uniform.

At least one embodiment of the present disclosure provides a screen brightness calibration method, including: acquiring a calibration brightness set, the calibration brightness set including a calibration brightness corresponding to a brightness level; for each display screen to be calibrated, determining and The backlight current value corresponding to each calibration brightness in the calibration brightness set is calibrated, and the backlight current value corresponding to each brightness level is calibrated to a backlight current value corresponding to the calibration brightness corresponding to the brightness level.

At least one embodiment of the present disclosure provides a screen brightness calibration apparatus including a memory and a processor, the memory storing a program, the program implementing the screen of any of the embodiments when read by the processor Brightness calibration method.

At least one embodiment of the present disclosure provides a computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement any A screen brightness calibration method according to an embodiment.

An embodiment of the present disclosure provides a screen brightness calibration system, including: a brightness calibration module, a brightness adjustment module, wherein: the brightness calibration module is configured to acquire a calibration brightness set, and the calibration brightness set includes a one-to-one correspondence with the brightness level. Calibrating brightness; for each display to be calibrated, determining a backlight current value corresponding to each of the calibrated brightness sets, and determining a backlight current value corresponding to each brightness level, that is, a calibration corresponding to the brightness level The backlight current value corresponding to the brightness is sent to the brightness adjustment module; the brightness adjustment module is configured to calibrate the backlight current value corresponding to each brightness level as a backlight corresponding to the brightness level received from the brightness calibration module Lamp current value.

In comparison with the related art, in at least one embodiment of the present disclosure, the brightness of the same brightness level is calibrated to the same brightness, thereby making the brightness of the plurality of display screens uniform. This calibration method avoids subjectivity, so the error is small and the efficiency is high.

Other features and advantages of the present disclosure will be set forth in the description which follows. The objectives and other advantages of the present disclosure can be realized and obtained by the structure particularly pointed out in the appended claims.

DRAWINGS

The drawings are provided to assist in the understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and the embodiments of the present application are used to explain the technical solutions of the present disclosure, and do not constitute a limitation of the technical solutions of the present disclosure.

Figure 1 is a schematic diagram showing the relationship between the current value of the backlight and the brightness;

FIG. 2 is a flowchart of a screen brightness calibration method according to an embodiment of the present disclosure;

FIG. 3 is a block diagram of a screen brightness calibration system according to an embodiment of the present disclosure;

4 is a block diagram of a screen brightness calibration system according to another embodiment of the present disclosure;

FIG. 5 is a block diagram of a screen brightness calibration system according to another embodiment of the present disclosure;

FIG. 6 is a block diagram of a screen brightness calibration apparatus according to another embodiment of the present disclosure.

detailed description

The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The brightness of the display is roughly proportional to the current of the backlight of the display. As the backlight current increases, as shown in Figure 1, the brightness and current of each display are proportional. The relationship, but the slope of the brightness and current relationship of each display is different, resulting in different screen brightness even when the backlight current is the same. In the present application, in order to make the screen brightness uniform, the backlight current value is changed so that the brightness of each display screen is the same under the same brightness level.

Embodiment 1

As shown in FIG. 2, an embodiment of the present disclosure provides a screen brightness calibration method, including:

Step 201: Acquire a calibration brightness set, where the calibration brightness set includes a calibration brightness corresponding to the brightness level one-to-one;

Step 202: Determine, for each display screen to be calibrated, a backlight current value corresponding to each calibration brightness in the calibration brightness set, and calibrate a backlight current value corresponding to each brightness level to a calibration corresponding to the brightness level. The backlight current value corresponding to the brightness.

The solution provided by the present application calibrates the brightness of the display screen at the same brightness level to the same brightness, so that the brightness of each display screen is consistent. The solution provided by the application has high efficiency and small error, and the brightness of the screen after calibration is relatively high.

In an embodiment, the brightness level comprises 255 levels. It should be noted that the present application is not limited thereto, and the application can be applied if the system can support more brightness levels. The terminal adjusts the brightness of the display according to the brightness level.

In an embodiment, in step 201, the calibration brightness set is composed of the original brightness corresponding to the brightness level one by one when the display screen of the display to be calibrated is not calibrated, and the maximum brightness of the display screen The minimum; or, the calibration brightness in the calibration brightness set is a preset value. That is, a calibration brightness set may be preset, or one of the plurality of displays that need to be calibrated may be used as a calibration reference, and the brightness of the other display screens may be aligned to be consistent with the display. It should be noted that the maximum brightness of the display screen as the calibration reference is smaller than the maximum brightness of the other display screens to be calibrated.

In another embodiment, the brightness specification of the terminal display screen requires that the maximum brightness of all the display screens is not lower than the first threshold, and the set calibration brightness maximum value is less than or equal to the first threshold.

In an embodiment, the current supplied by the terminal to the backlight of the display screen is divided into 255 levels, and 20/255*n represents the current value of the nth level, where n is from 1 to 255, and the corresponding current value is I. ₁ to I ₂₅₅ , measure the brightness of the display of each level when the backlight current is from 1 to 255, and obtain L ₁ to L ₂₅₅ brightness values.

The set calibration brightness is also set from B ₁ to B ₂₅₅ values from small to large, usually B _{n is} smaller than L _n .

Decreasing the brightness corresponding to the brightness level n from L _n to B _n , n from 1 to 255, and reducing the current when the brightness level is n (I _n -I _n-1 )*(L _n -B _n )/(L _{n -} L _n-1 ), the reduced current I' _n is I _n -(I _n -I _n-1 )*(L _n -B _n )/(L _n -L _n-1 ), ie, current I ' _n as the backlight current value corresponding to the brightness level n.

Illustratively, the determining, by the backlight current value corresponding to each of the calibration brightness sets, the display screen brightness L _m and the backlight current value I _n when the brightness level is _n , obtaining the brightness level For display brightness L _n-1 and backlight current value I _{n-1 at n-1} , I' _n =I _n -(I _n -I _n-1 )*(L _n -B _n )/( L _{n -} L _n-1 ) as a backlight current value when the brightness level is n, the B _n is a calibration brightness corresponding to the brightness level n in the calibration brightness set; n=1, . . . , N

Alternatively, the determining, according to each of the calibration brightness sets, the backlight current value comprises: obtaining the display screen brightness L _m and the backlight current value I _m when the brightness level is _m , and obtaining the brightness level as m- 1 hour display brightness L _m-1 and backlight current value I _m-1 , I' _m =I _m -(I _m -I _m-1 )*(L _m -B _m )/(L _m - L _m-1 ) as a backlight current value when the brightness level is m, a partial value of the m=1, . . . , N; linear interpolation using I′ _m to obtain a backlight current value at other brightness levels. For example, the brightness of the display is collected every 10 brightness levels, thereby obtaining I' ₁ , I' ₁₀ , I' ₂₀ ,..., I' ₂₅₀ , I' ₂₅₅ , and then interpolating I' ₁ and I' ₁₀ I' ₂ ~ I' ₉ , I' ₁₀ and I' ₂₀ are interpolated to obtain I' ₁₁ ~ I' ₁₉ , and so on. It should be noted that the brightness of the display screen can also be collected once every 20 brightness levels, or the like, or a part of the brightness level is selected to collect the brightness of the display screen, and the like. The specific linear interpolation method can be based on related technologies, and will not be described here.

In an embodiment, the determining a backlight current value corresponding to each of the calibration brightness sets comprises:

Adjusting the backlight current to obtain the brightness of the display screen, such that the brightness of the display screen is respectively the calibration brightness in the set of calibration brightnesses, and recording the backlight current value corresponding to the calibration brightness; that is, performing each brightness level Calibrating, obtaining a backlight current value corresponding to each brightness level (ie, a backlight current value corresponding to the calibration brightness corresponding to each brightness level);

Or adjusting the backlight current to obtain the display brightness, such that the brightness of the display screen is respectively a plurality of calibration brightnesses in the calibration brightness set, and recording a backlight current value corresponding to the calibration brightness; according to the recorded backlight The current values are linearly interpolated to obtain backlight current values corresponding to other calibrated brightnesses in the set of calibrated brightness. That is, only part of the brightness level is calibrated. Since there is a linear relationship between the backlight current value and the brightness, the backlight current value of the partial brightness level can be obtained by linear linear interpolation to obtain the backlight current value of other brightness levels, for example. The backlight current values of the brightness levels of the brightness levels 1, 5, 10, 15, ..., 255 are obtained, and the backlight current values of the other brightness levels are obtained by linear interpolation. Here, for example only, it is also possible to obtain backlight current values of brightness levels of 1, 1, 20, 30, ..., 250, 255, and backlight current values of other brightness levels are obtained by linear interpolation, and the like.

In this embodiment, the brightness of each brightness level is collected, and the backlight current value of each brightness level is determined according to the difference between the brightness and the calibration brightness of the brightness level.

The solution provided by the present application can calibrate a single display screen or calibrate multiple display screens, which can be multiple display screens of a multi-screen terminal, or can be displayed by multiple independent terminals. The screen can also be a separate display (not mounted on the terminal), and the terminal can be a mobile phone, a tablet, a computer, a television, and the like.

Embodiment 2

As shown in FIG. 3, the embodiment provides a screen brightness calibration system, including: a brightness calibration module 301 and a brightness adjustment module 302, wherein:

The brightness calibration module 301 is configured to obtain a calibration brightness set, the calibration brightness set includes a calibration brightness corresponding to the brightness level; and for each display to be calibrated, determine each calibration in the calibration brightness set a backlight current value corresponding to the brightness, and a backlight current value corresponding to each brightness level, that is, a backlight current value corresponding to the calibration brightness corresponding to the brightness level is sent to the brightness adjustment module;

The brightness adjustment module 302 is configured to calibrate a backlight current value corresponding to each brightness level as a backlight current value corresponding to the brightness level received from the brightness calibration module.

The brightness calibration module 301 and the brightness adjustment module 302 may be located in the same device, or may be located in different devices. For example, the brightness calibration module 301 and the brightness adjustment module 302 are both located in the dual-screen terminal to be calibrated, or one of them is located at the computer end. One of them is located in a dual screen terminal.

In an embodiment, the screen brightness calibration system further includes a brightness acquisition device 300, wherein:

The brightness collection device 300 is configured to: after receiving the brightness acquisition command sent by the brightness calibration module 301, collect the brightness of the display screen, and send the collected brightness to the brightness calibration module 301;

In one implementation, the brightness calibration module 301 includes a first calibration unit 3011 and a second calibration unit 3012, wherein:

The first calibration unit 3011 is configured to send a brightness level to the brightness adjustment module 302, send a brightness collection instruction to the brightness collection device 300, receive the brightness sent by the brightness collection device 300, and receive the brightness adjustment module. The backlight current value at the current brightness level sent by 302;

The second calibration unit 3012 is configured to display the brightness _Lm and the backlight current value I _n according to the brightness level _n , and the display brightness L _n-1 and the backlight current when the brightness level is n-1 The value I _n-1 , obtains I' _n =I _n -(I _n -I _n-1 )*(L _n -B _n )/(L _n -L _n-1 ) as the backlight when the brightness level is n Current value, I′ _n and its corresponding brightness level are sent to the brightness adjustment module 302; n=1, . . . , N, or the display screen brightness L _m and the backlight current value I according to the brightness level m _m, and a brightness level of backlight L _m-1 m-1 and the current value of the brightness of the display when the I _m-1, Get _{I 'm = I m - (} I m -I m-1) * (L m -B _m )/(L _m -L _m-1 ) as the backlight current value when the brightness level is m, the partial value of m=1, . . . , N; linear interpolation using I′ _m to obtain other brightness The brightness value of the backlight current value I' _j , j = 1, ..., N is other values; I' _m , I' _j and its corresponding brightness level is sent to the brightness adjustment module 302;

The brightness adjustment module 302 includes a first adjustment unit 3021 and a second adjustment unit 3022, wherein:

The first adjusting unit 3021 is configured to receive a brightness level, and send a backlight current value corresponding to the current brightness level to the brightness calibration module 302; and the backlight current value corresponding to each brightness level when the terminal display screen is not calibrated; It is already stored in the terminal, so the backlight current value can be directly obtained.

The second adjusting unit 3022 is configured to calibrate a backlight current value corresponding to each brightness level as a backlight current value corresponding to the brightness level received from the brightness calibration module. It should be noted that the original backlight current value can still be saved, the original backlight current value is used for display when calibration is not required, and the calibrated backlight current value is used when calibration is required.

In another embodiment, as shown in FIG. 4, the brightness calibration module 301 includes a third calibration unit 4011 and a fourth calibration unit 4012, wherein:

The third calibration unit 4011 is configured to send a brightness level to the brightness adjustment module, send a brightness collection instruction to the brightness collection device, and receive the brightness sent by the brightness collection device, when the received brightness is not the current brightness level. When the corresponding brightness is calibrated, a brightness adjustment command is sent to the brightness adjustment module; when the received brightness is the calibration brightness corresponding to the current brightness level, a brightness adjustment end command is sent to the brightness adjustment module to record the current backlight current. value;

The fourth calibration unit 4012 is configured to send the brightness level acquired by the first unit and the corresponding backlight current value to the brightness adjustment module, or perform linear interpolation according to the recorded backlight current value. The backlight current value corresponding to the other calibration brightness in the calibration brightness set is sent, and the brightness level and the corresponding backlight current value are sent to the brightness adjustment module;

The brightness adjustment module 302 includes a third adjustment unit 4021 and a fourth adjustment unit 4022, wherein:

The third adjusting unit 4021 is configured to receive a brightness level, and after receiving the brightness adjustment command, adjust the backlight current; after receiving the brightness adjustment end command, send the current backlight current value to the brightness calibration module;

The fourth adjusting unit 4022 is configured to calibrate the backlight current value corresponding to each brightness level to a backlight current value corresponding to the brightness level received from the brightness calibration module 301.

The solution provided in this embodiment directly adjusts the brightness of the display screen to the calibration brightness and saves the corresponding backlight current value. When the display is performed subsequently, the calibrated backlight current value is used for display.

Embodiment 3

The embodiment provides a screen brightness calibration system, including a brightness collection device 501, a brightness calibration module 502 (located in the computer in this embodiment), and a brightness adjustment module 503 (in the present embodiment, a dual-screen terminal). a display and a second display, wherein:

The brightness acquiring device 501 is configured to: after receiving the brightness acquiring instruction, collect the brightness of the display screen, and send the brightness to the brightness collecting module 502; wherein the brightness collecting device 501 collects the white displayed by the dual screen terminal display screen The brightness data of the picture.

The brightness calibration module 502 is configured to: after transmitting the brightness level to the brightness adjustment module 503, send the collection brightness command to the brightness collection device 501, and receive the brightness sent by the brightness collection device;

The brightness calibration module 502, for the first display screen, according to the display screen brightness L _m and the backlight current value I _n when the brightness level is n, and the display screen brightness L _n-1 and the backlight current when the brightness level is n-1 Value I _n-1 , obtain I' _n =I _n -(I _n -I _n-1 )*(L _n -B _n )/(L _n -L _n-1 ) as the first display screen brightness level is n The backlight current value, the I′ _n and its corresponding brightness level are sent to the brightness adjustment module 302; n=1, . . . , N, for the second display screen, according to the brightness of the display screen when the brightness level is n L _m and the backlight current value I _n , and the display screen brightness L _n-1 and the backlight current value I _n-1 when the brightness level is _n-1 , obtain I' _n =I _n -(I _n -I _{n -1} )*(L _n -B _n )/(L _n -L _n-1 ) is used as the backlight current value when the second display screen brightness level is n, and I′ _n and its corresponding brightness level are sent to the said brightness adjustment module 302; n = 1, ..., N, the first display screen I _'n and the second display screen I' _n to a brightness adjusting module;

The brightness adjustment module 503 is configured to adjust the display brightness according to the brightness level; when the backlight current value provided by the brightness calibration module is not received, the original backlight current value is used, and after receiving the backlight current value provided by the brightness calibration module, The backlight current value provided by the brightness calibration module adjusts the display brightness.

As shown in FIG. 6, an embodiment of the present disclosure provides a screen brightness calibration device 60, which includes a memory 610 and a processor 620. The memory 610 stores a program that is executed when read and executed by the processor 620. The following operations:

Obtaining a calibration brightness set, the calibration brightness set including a calibration brightness corresponding to the brightness level;

Determining, according to each display screen to be calibrated, a backlight current value corresponding to each calibration brightness in the calibration brightness set, and calibrating a backlight current value corresponding to each brightness level corresponding to the calibration brightness corresponding to the brightness level Backlight current value.

In other embodiments, the program, when read by the processor 620, implements the screen brightness calibration method of any of the embodiments.

An embodiment of the present disclosure provides a computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement any The screen brightness calibration method described in the embodiment.

The computer readable storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The embodiments disclosed in the present disclosure are as described above, but are merely used to facilitate the understanding of the present disclosure, and are not intended to limit the present disclosure. Any modification or variation in the form and details of the implementation may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Claims (10)

1. A screen brightness calibration method includes:

   Obtaining a calibration brightness set, the calibration brightness set including a calibration brightness corresponding to the brightness level;

   Determining, according to each display screen to be calibrated, a backlight current value corresponding to each calibration brightness in the calibration brightness set, and calibrating a backlight current value corresponding to each brightness level corresponding to the calibration brightness corresponding to the brightness level Backlight current value.
2. The screen brightness calibration method according to claim 1, wherein the calibration brightness set is composed of original brightness corresponding to a brightness level one by one when one of the display screens to be calibrated is not calibrated, and the display The maximum brightness of the screen is the smallest; or the calibration brightness in the set of calibration brightness is a preset value.
3. The screen brightness calibration method according to claim 1, wherein said determining a backlight current value corresponding to each of said calibration brightness sets comprises:

   Obtaining the display brightness L _m and the backlight current value I _n when the brightness level is _n , and obtaining the display brightness L _n-1 and the backlight current value I _n-1 when the brightness level is n-1, _I'n =I _n -(I _n -I _n-1 )*(L _n -B _n )/(L _n -L _n-1 ) as a backlight current value when the brightness level is n, the B _n is the Calibrating the calibration brightness corresponding to the brightness level n in the brightness set; n=1,...,N

   Alternatively, the display screen brightness L _m and the backlight current value I _m when the brightness level is m are obtained, and the display screen brightness L _m-1 and the backlight current value I _m-1 when the brightness level is m-1 are obtained, and I ' _m =I _m -(I _m -I _m-1 )*(L _m -B _m )/(L _m -L _m-1 ) as the backlight current value when the brightness level is m, the m=1 , ..., partial values in N; linear interpolation using I' _m to obtain backlight current values at other brightness levels.
4. The screen brightness calibration method according to claim 1, wherein said determining a backlight current value corresponding to each of said calibration brightness sets comprises:

   Adjusting the backlight current to obtain the brightness of the display screen, such that the brightness of the display screen is each of the calibration brightness sets, and recording the backlight current value corresponding to the calibration brightness;

   Or adjusting the backlight current to obtain the display brightness, such that the brightness of the display screen is respectively a plurality of calibration brightnesses in the calibration brightness set, and recording a backlight current value corresponding to the calibration brightness; according to the recorded backlight The current values are linearly interpolated to obtain backlight current values corresponding to other calibrated brightnesses in the set of calibrated brightness.
5. The screen brightness calibration method according to any one of claims 1 to 4, wherein the brightness level comprises 255 levels.
6. A screen brightness calibration device comprising a memory and a processor, the memory storing a program, the program implementing the screen brightness calibration method according to any one of claims 1 to 5 when read by the processor .
7. A computer readable storage medium having stored therein one or more programs, the one or more programs being executable by one or more processors to effect screen brightness calibration as claimed in any one of claims 1 to 5. method.
8. A screen brightness calibration system includes: a brightness calibration module, a brightness adjustment module, wherein:

   The brightness calibration module is configured to obtain a calibration brightness set, the calibration brightness set includes a calibration brightness corresponding to the brightness level; and for each display screen to be calibrated, determine each calibration brightness in the calibration brightness set Corresponding backlight current value, the backlight current value corresponding to each brightness level, that is, the backlight current value corresponding to the calibration brightness corresponding to the brightness level is sent to the brightness adjustment module;

   The brightness adjustment module is configured to calibrate a backlight current value corresponding to each brightness level as a backlight current value corresponding to the brightness level received from the brightness calibration module.
9. The screen brightness calibration system of claim 8 wherein said screen brightness calibration system further comprises a brightness acquisition device, wherein:

   The brightness collecting device is configured to: after receiving the brightness acquiring instruction sent by the brightness calibration module, collect brightness of the display screen, and send the collected brightness to the brightness calibration module;

   The brightness calibration module includes a first calibration unit and a second calibration unit, wherein:

   The first calibration unit is configured to send a brightness level to the brightness adjustment module, send a brightness collection instruction to the brightness collection device, receive the brightness sent by the brightness collection device, and receive the current brightness sent by the brightness adjustment module. Backlight current value at the level;

   The second calibration unit is set to display brightness _Lm and backlight current value I _n according to the brightness level _n , and display screen brightness L _n-1 and backlight current value when the brightness level is n-1 I _n-1 , obtain I' _n =I _n -(I _n -I _n-1 )*(L _n -B _n )/(L _n -L _n-1 ) as the backlight current when the brightness level is n a value, sending I′ _n and its corresponding brightness level to the brightness adjustment module; n=1, . . . , N, or, according to the display level brightness L _m and the backlight current value I _m when the brightness level is _m , and a brightness level of backlight L _m-1 m-1 and the current value of the brightness of the display when the I _m-1, Get _{I 'm = I m - (} I m -I m-1) * (L m -B _m ) / (L _{m -} L _m-1 ) as the backlight current value when the brightness level is m, the partial value of the m=1, . . . , N; linear interpolation using I′ _m to obtain other brightness levels The backlight current value I _j , j=1, . . . , N is other values of m; sending I′ _m , I′ _j and their corresponding brightness levels to the brightness adjustment module;

   The brightness adjustment module includes a first adjustment unit and a second adjustment unit, wherein:

   The first adjusting unit is configured to receive a brightness level, adjust a brightness of the display screen according to the brightness level, and send a backlight current value corresponding to the current brightness level to the brightness calibration module;

   The second adjusting unit is configured to calibrate a backlight current value corresponding to each brightness level as a backlight current value corresponding to the brightness level received from the brightness calibration module.
10. The screen brightness calibration system of claim 8 wherein said screen brightness calibration system further comprises a brightness acquisition device, wherein:

    The brightness collecting device is configured to: after receiving the brightness acquiring instruction sent by the brightness calibration module, collect brightness of the display screen, and send the collected brightness to the brightness calibration module;

    The brightness calibration module includes a third calibration unit and a fourth calibration unit, wherein:

    The third calibration unit is configured to send a brightness level to the brightness adjustment module, send a brightness collection instruction to the brightness collection device, and receive the brightness sent by the brightness collection device, when the received brightness is not the current brightness level. When the brightness is calibrated, a brightness adjustment command is sent to the brightness adjustment module; when the received brightness is the calibration brightness corresponding to the current brightness level, a brightness adjustment end command is sent to the brightness adjustment module to record the current backlight current value. ;

    The fourth calibration unit is configured to send the brightness level acquired by the first unit and a corresponding backlight current value to the brightness adjustment module, or perform linear interpolation according to the recorded backlight current value to obtain the Calibrating a backlight current value corresponding to other calibration brightnesses in the brightness set, and transmitting the brightness level and the corresponding backlight current value to the brightness adjustment module;

    The brightness adjustment module includes a third adjustment unit and a fourth adjustment unit, wherein:

    The third adjusting unit is configured to receive a brightness level, adjust a brightness of the display screen according to the brightness level, and adjust a backlight current after receiving the brightness adjustment instruction; and after receiving the brightness adjustment end instruction, the current a backlight current value is sent to the brightness calibration module;

    The fourth adjusting unit is configured to calibrate a backlight current value corresponding to each brightness level as a backlight current value corresponding to the brightness level received from the brightness calibration module.

Images