CN111883071A - Backlight compensation method and device, display equipment and readable storage medium - Google Patents

Backlight compensation method and device, display equipment and readable storage medium Download PDF

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Publication number
CN111883071A
CN111883071A CN202010809456.8A CN202010809456A CN111883071A CN 111883071 A CN111883071 A CN 111883071A CN 202010809456 A CN202010809456 A CN 202010809456A CN 111883071 A CN111883071 A CN 111883071A
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led
backlight
preset
backlight compensation
compensation value
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戴宇明
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Shenzhen Skyworth RGB Electronics Co Ltd
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Shenzhen Skyworth RGB Electronics Co Ltd
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Priority to CN202010809456.8A priority Critical patent/CN111883071A/en
Priority to PCT/CN2020/125551 priority patent/WO2022032890A1/en
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    • G—PHYSICS
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides a backlight compensation method, a device, a display device and a readable storage medium, wherein the backlight compensation method comprises the following steps: recording LED driving parameters of a preset time interval; calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm; after a preset time, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm; and performing backlight compensation according to the backlight compensation value. According to the backlight compensation method, the LED driving parameters are recorded in real time, and the backlight compensation value is calculated, so that the backlight compensation precision is improved, the screen backlight of the display equipment can be kept stable, and a user can compensate the light attenuation of the display equipment under the condition of no perception, so that the user experience is improved.

Description

Backlight compensation method and device, display equipment and readable storage medium
Technical Field
The invention relates to the technical field of display, in particular to a backlight compensation method and device, display equipment and a readable storage medium.
Background
When the display device is used, an LED Light emitting panel (LED) of the display device may continuously attenuate its function, i.e., Light decay, with the passage of time. At present, in order to solve the problem of light attenuation, a manufacturer of the LED generally provides a fixed light attenuation curve, and compensation is performed according to the light attenuation curve. However, in different use environments, the fixed light attenuation curve is used for compensation, and the compensation precision is low, so that the user experience is influenced.
Disclosure of Invention
In view of the above, the present invention provides a method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a backlight compensation method, comprising:
recording LED driving parameters of a preset time interval;
calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm;
after a preset time, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm;
and performing backlight compensation according to the backlight compensation value.
Preferably, in the backlight compensation method, the LED driving parameters include an LED driving frequency, an LED switching number and an LED driving duty ratio, and the backlight turn-on parameters include a total LED switching number and a total LED power-on time.
Preferably, in the backlight compensation method, the first preset algorithm includes:
SLED＝S′LED+s；TLED＝T′LED+fLED×dLED；
in the formula, SLEDIs the total number of times of switching of the LED, S'LEDThe total number of the LED switches before the current preset time interval is used, and s is the number of the LED switches in the current preset time interval; t isLEDIs the total power-on time of the LED, T'LEDFor the total LED on-time, f, before the current preset time intervalLEDFor the LED drive frequency, d, within the current preset time intervalLEDThe duty ratio of the LED driving in the current preset time interval.
Preferably, in the backlight compensation method, the calculating a backlight compensation value by using the backlight turn-on parameter through a second preset algorithm includes:
if the total LED power-on time is less than or equal to the preset LED power-on time, calculating the backlight compensation value through a first compensation algorithm by using the total LED power-on time, the preset LED power-on time and a preset compensation value;
and if the total LED power-on time is longer than the preset LED power-on time, calculating the backlight compensation value by using the total LED switching times, the preset LED switching times and the preset compensation value through a second compensation algorithm.
Preferably, in the backlight compensation method, the first compensation algorithm includes:
Figure BDA0002630397670000021
wherein A is the backlight compensation value, TLEDAnd T is the total LED power-on time, T is the preset LED power-on time, and A' is the preset compensation value.
Preferably, in the backlight compensation method, the second compensation algorithm includes:
Figure BDA0002630397670000022
wherein A is the backlight compensation value, SLEDAnd the total switching times of the LEDs are set, S is the preset switching times of the LEDs, and A' is the preset compensation value.
Preferably, in the backlight compensation method, before the calculating the backlight compensation value by using the backlight turn-on parameter through a second preset algorithm, the method further includes:
and receiving the backlight compensation parameters sent by the remote database, and performing backlight compensation according to the backlight compensation parameters.
The present invention also provides a backlight compensation apparatus, comprising:
the driving parameter recording module is used for recording LED driving parameters of a preset time interval;
the starting parameter calculation module is used for calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm;
the compensation value calculating module is used for calculating a backlight compensation value by utilizing the backlight starting parameter through a second preset algorithm after a preset time;
and the backlight compensation module is used for performing backlight compensation according to the backlight compensation value.
The invention also provides a display device, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor runs the computer program to enable the display device to execute the backlight compensation method.
The invention also provides a readable storage medium storing a computer program which, when run on a processor, performs the backlight compensation method.
The invention provides a backlight compensation method, which comprises the following steps: recording LED driving parameters of a preset time interval; calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm; after a preset time, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm; and performing backlight compensation according to the backlight compensation value. According to the backlight compensation method, the LED driving parameters are recorded in real time, and the backlight compensation value is calculated, so that the backlight compensation precision is improved, the screen backlight of the display equipment can be kept stable, and a user can compensate the light attenuation of the display equipment under the condition of no perception, so that the user experience is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and 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 of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a flowchart of a backlight compensation method according to embodiment 1 of the present invention;
fig. 2 is a flowchart of calculating a backlight compensation value according to embodiment 2 of the present invention;
fig. 3 is a flowchart of a backlight compensation method according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of a backlight compensation device provided in embodiment 4 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a flowchart of a backlight compensation method provided in embodiment 1 of the present invention, where the method includes the following steps:
step S11: and recording the LED driving parameters of the preset time interval.
In the embodiment of the present invention, the LED Light Emitting panel (LED) of the display device may have a function that continuously attenuates with the passage of time, and the main reason for affecting the Light attenuation of the LED Light Emitting panel is the lighting time and the switching frequency of the LED, and the faster the lighting time and the switching frequency are, the faster the Light attenuation speed is. Therefore, the LED driving parameters can be recorded in real time in the display device, and the light attenuation compensation can be carried out according to the driving parameters.
In the embodiment of the invention, the LED driving parameters can be recorded according to the preset time interval, and the LED driving parameters comprise the LED driving frequency, the LED switching frequency and the LED driving duty ratio in the current preset time interval. The corresponding LED driving frequency, the LED switching frequency and the LED driving duty ratio of each time period can be recorded, so that the change of the LED driving parameters of the LED light-emitting plate of the display device during working is recorded, and the precision of subsequent calculation of light attenuation or backlight compensation values is improved. The above-mentioned process of recording the LED driving parameters at the preset time interval may be implemented by using an algorithm or an application program, for example, an application program may be provided in the display device, and the application program records the LED driving parameters at the corresponding time interval after the preset time interval elapses, which is not limited herein.
Step S12: and calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm.
In the embodiment of the invention, the LED driving parameters comprise LED driving frequency, LED switching times and LED driving duty ratio in the current preset time interval, and the backlight starting parameters comprise total LED switching times and total LED power-on time. After each preset time interval passes and the LED driving frequency, the LED switching frequency and the LED driving duty ratio of the corresponding time period are obtained, the LED driving frequency and the LED driving duty ratio can be used for calculating the LED power-on time in the time period and accumulating the LED power-on time into the total LED power-on time, and the LED switching frequency in the time period is also accumulated into the total LED switching frequency. The LED driving frequency and the LED driving duty ratio can be changed according to the image required to be displayed by the display equipment, or the LED driving frequency and the LED driving duty ratio are not a fixed value under the influence of the power supply frequency of the display equipment, so that the LED energizing time calculation accuracy can be improved by setting a preset time interval to collect the LED driving frequency and the LED driving duty ratio. The preset time interval can be set by a user, and the smaller the preset time interval is, the more the change of the LED driving frequency and the LED driving duty ratio can be reflected, so that the accuracy of the calculation of the total LED power-on time is improved.
In an embodiment of the present invention, the first predetermined algorithm includes:
SLED＝S′LED+s；TLED＝T′LED+fLED×dLED；
in the formula, SLEDIs the total number of times of switching of the LED, S'LEDThe total number of the LED switches before the current preset time interval is used, and s is the number of the LED switches in the current preset time interval; t isLEDIs the total power-on time of the LED, T'LEDFor the total LED on-time, f, before the current preset time intervalLEDFor the LED drive frequency, d, within the current preset time intervalLEDThe duty ratio of the LED driving in the current preset time interval. The display device may be provided with an application program based on the first preset algorithm, and the total LED on-off time and the total LED on-off times are calculated through the application program.
Step S13: and after the preset time, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm.
In the embodiment of the invention, after the preset time, the display device calculates the backlight compensation value by using the backlight starting parameter obtained by accumulation, namely the total LED power-on time and the total LED switching times through a second preset algorithm. The display device can be further provided with a counter, the total number of the LED switches and the LED power-on time are accumulated and counted once every preset time interval, and the backlight compensation value is calculated after the value of the counter reaches a preset value.
In the embodiment of the present invention, the process of calculating the backlight compensation value by using the second preset algorithm may be implemented by using an application program, for example, the application program based on the second preset algorithm may be set in the display device, and is started after a preset time elapses, and the backlight compensation value is calculated by using the second preset algorithm according to the obtained backlight start parameter.
Step S14: and performing backlight compensation according to the backlight compensation value.
In the embodiment of the invention, the LED driving parameters are recorded in real time and the backlight compensation value is calculated, so that the backlight compensation precision is improved, the screen backlight of the display equipment can be kept stable, and the user can compensate the light attenuation of the display equipment under the condition of no perception, so that the user experience is improved.
Example 2
Fig. 2 is a flowchart of calculating a backlight compensation value according to embodiment 2 of the present invention, which includes the following steps:
step S21: and if the total LED power-on time is less than or equal to the preset LED power-on time, calculating the backlight compensation value by using the total LED power-on time, the preset LED power-on time and a preset compensation value through a first compensation algorithm.
In an embodiment of the present invention, the first compensation algorithm includes:
Figure BDA0002630397670000071
wherein A is the backlight compensation value, TLEDAnd T is the total LED power-on time, T is the preset LED power-on time, and A' is the preset compensation value. The display device can be provided with an application program based on the first compensation algorithm, and when the display device determines that the total LED power-on time is less than or equal to the preset LED power-on time, the display device starts the application based on the first compensation algorithmAnd programming to calculate the backlight compensation value.
Step S22: and if the total LED power-on time is longer than the preset LED power-on time, calculating the backlight compensation value by using the total LED switching times, the preset LED switching times and the preset compensation value through a second compensation algorithm.
In an embodiment of the present invention, the first compensation algorithm includes:
Figure BDA0002630397670000081
wherein A is the backlight compensation value, SLEDAnd the total switching times of the LEDs are set, S is the preset switching times of the LEDs, and A' is the preset compensation value. The display device may be provided with an application program based on the second compensation algorithm, and when it is determined that the total LED power-on time is greater than the preset LED power-on time, the display device starts the application program based on the second compensation algorithm, so as to calculate the backlight compensation value.
Example 3
Fig. 3 is a flowchart of a backlight compensation method provided in embodiment 3 of the present invention, where the method includes the following steps:
step S31: and recording the LED driving parameters of the preset time interval.
This step is identical to step S11 described above, and will not be described herein again.
Step S32: and calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm.
This step is identical to step S12 described above, and will not be described herein again.
Step S33: and after the preset time, receiving the backlight compensation parameters sent by the remote database, and performing backlight compensation according to the backlight compensation parameters.
In the embodiment of the invention, before the backlight compensation value is calculated by using the backlight starting parameter and the second preset algorithm, the display device can also access the remote database through network connection to obtain the latest backlight compensation parameter provided by the remote database. The remote database may generate a backlight compensation parameter appropriate for the area in which the display device is located. And when the display equipment does not receive the backlight compensation parameter, calculating the backlight compensation value by using the local backlight starting parameter and a preset algorithm.
Step S34: and when the backlight compensation parameter is not received, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm.
This step is identical to step S13 described above, and will not be described herein again.
Step S35: and performing backlight compensation according to the backlight compensation value.
This step is identical to step S14 described above, and will not be described herein again.
Example 4
Fig. 4 is a schematic structural diagram of a backlight compensation device provided in embodiment 4 of the present invention.
The backlight compensation apparatus 400 includes:
a driving parameter recording module 410, configured to record LED driving parameters at preset time intervals;
a starting parameter calculating module 420, configured to calculate a backlight starting parameter by using the LED driving parameter through a first preset algorithm;
a compensation value calculating module 430, configured to calculate a backlight compensation value by using the backlight starting parameter through a second preset algorithm after a preset time elapses;
the backlight compensation module 440 is configured to perform backlight compensation according to the backlight compensation value.
In the embodiment of the present invention, for more detailed functional description of each module and each unit, reference may be made to contents of corresponding parts in the foregoing embodiment, which are not described herein again.
In addition, the present invention also provides a display device, which includes a memory and a processor, wherein the memory can be used for storing a computer program, and the processor can make the display device execute the functions of each module in the above method or the above remote control frequency switching device by running the computer program.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the display device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The present embodiment also provides a readable storage medium for storing a computer program used in the above-described display device.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can 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 invention. 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 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, each functional module or unit in each embodiment of the present invention 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 invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. 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.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A backlight compensation method, comprising:
recording LED driving parameters of a preset time interval;
calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm;
after a preset time, calculating a backlight compensation value by using the backlight starting parameter through a second preset algorithm;
and performing backlight compensation according to the backlight compensation value.
2. The backlight compensation method of claim 1, wherein the LED driving parameters comprise an LED driving frequency, an LED switching number and an LED driving duty ratio, and the backlight turn-on parameters comprise a total LED switching number and a total LED power-on time.
3. The backlight compensation method of claim 2, wherein the first predetermined algorithm comprises:
SLED＝S′LED+s；TLED＝T′LED+fLED×dLED；
in the formula, SLEDIs the total number of times of switching of the LED, S'LEDThe total number of the LED switches before the current preset time interval is used, and s is the number of the LED switches in the current preset time interval; t isLEDIs the total power-on time of the LED, T'LEDFor the total LED on-time, f, before the current preset time intervalLEDFor the LED drive frequency, d, within the current preset time intervalLEDThe duty ratio of the LED driving in the current preset time interval.
4. The backlight compensation method of claim 2, wherein the calculating a backlight compensation value by a second preset algorithm using the backlight-on parameter comprises:
if the total LED power-on time is less than or equal to the preset LED power-on time, calculating the backlight compensation value through a first compensation algorithm by using the total LED power-on time, the preset LED power-on time and a preset compensation value;
and if the total LED power-on time is longer than the preset LED power-on time, calculating the backlight compensation value by using the total LED switching times, the preset LED switching times and the preset compensation value through a second compensation algorithm.
5. The backlight compensation method of claim 4, wherein the first compensation algorithm comprises:
Figure FDA0002630397660000021
wherein A is the backlight compensationValue, TLEDAnd T is the total LED power-on time, T is the preset LED power-on time, and A' is the preset compensation value.
6. The backlight compensation method of claim 4, wherein the second compensation algorithm comprises:
Figure FDA0002630397660000022
wherein A is the backlight compensation value, SLEDAnd the total switching times of the LEDs are set, S is the preset switching times of the LEDs, and A' is the preset compensation value.
7. The backlight compensation method according to claim 1, further comprising, before calculating a backlight compensation value by a second preset algorithm using the backlight-on parameter:
and receiving the backlight compensation parameters sent by the remote database, and performing backlight compensation according to the backlight compensation parameters.
8. A backlight compensation apparatus, comprising:
the driving parameter recording module is used for recording LED driving parameters of a preset time interval;
the starting parameter calculation module is used for calculating a backlight starting parameter by using the LED driving parameter through a first preset algorithm;
the compensation value calculating module is used for calculating a backlight compensation value by utilizing the backlight starting parameter through a second preset algorithm after a preset time;
and the backlight compensation module is used for performing backlight compensation according to the backlight compensation value.
9. A display device comprising a memory storing a computer program and a processor running the computer program to cause the display device to perform the backlight compensation method according to any one of claims 1 to 7.
10. A readable storage medium, characterized in that it stores a computer program which, when run on a processor, performs the backlight compensation method of any one of claims 1 to 7.
CN202010809456.8A 2020-08-12 2020-08-12 Backlight compensation method and device, display equipment and readable storage medium Pending CN111883071A (en)

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