CN116665606A - Control method and device for energy-saving LED mobile phone backlight source - Google Patents

Control method and device for energy-saving LED mobile phone backlight source Download PDF

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Publication number
CN116665606A
CN116665606A CN202310707056.XA CN202310707056A CN116665606A CN 116665606 A CN116665606 A CN 116665606A CN 202310707056 A CN202310707056 A CN 202310707056A CN 116665606 A CN116665606 A CN 116665606A
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Prior art keywords
mobile phone
value
energy
backlight source
preset
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CN202310707056.XA
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Chinese (zh)
Inventor
吴媛
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Shenzhen New Star Science & Technologies Co ltd
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Shenzhen New Star Science & Technologies Co ltd
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Priority to CN202310707056.XA priority Critical patent/CN116665606A/en
Publication of CN116665606A publication Critical patent/CN116665606A/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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Telephone Function (AREA)

Abstract

The invention provides a control method and a device for an energy-saving LED mobile phone backlight source, which are used for calculating the current value of the mobile phone backlight source; judging whether the current value is in a preset energy-saving current range or not; according to the minimum brightness of the preset reference light source, regulating the brightness of the mobile phone backlight source, counting the pixel numbers of three primary colors of a mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard; increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula; judging whether the intensity of a light source received by the LED photosensitive element is within a preset photosensitive range according to the receiving of the LED photosensitive element of the mobile phone backlight source to the ambient light; if so, the light source intensity value is adjusted according to the ambient light, the mobile phone backlight source is controlled more intelligently, the energy is saved, the energy-saving control utilizes the adjustment of the ambient light to adjust the mobile phone backlight source, the ambient light is attached to the mobile phone backlight source in the process of adjusting the mobile phone backlight source, and the eyesight of a user is protected.

Description

Control method and device for energy-saving LED mobile phone backlight source
Technical Field
The invention relates to the technical field of backlight control, in particular to a control method and a device for an energy-saving LED mobile phone backlight.
Background
BackLight (BackLight) is a light source located behind a Liquid Crystal Display (LCD) and its lighting effect will directly affect the liquid crystal display module (LCM) visual effect. The liquid crystal display itself does not emit light, it displays graphics or it is the result of modulating light.
The application number CN202011145860.6 discloses an ultrathin mobile phone LED backlight driving control system, which comprises a single-path power input circuit, a conversion output multi-path power module, an FPGA programmable module, a PWM regulation module, a master control MCU, a backlight driving module, a photosensitive module and an LED lamp group; the single-channel power input circuit inputs a single-channel power signal to the FPGA programmable module through a conversion output multi-channel power module, and the FPGA programmable module inputs multi-channel output signals to the main control MCU through a PWM regulation module; the MCU controls the photosensitive module through the backlight source driving module, and the photosensitive module controls the LED lamp group to emit light. The invention provides the ultrathin mobile phone LED backlight driving control system which has high intelligent degree, can adjust the brightness of the mobile phone LED backlight, is convenient to operate, has various functions and high reliability.
In the control of the backlight, a more energy-saving light source is needed instead of just obtaining a better display effect, so that the control of the mobile phone backlight by adopting an energy-saving LED is needed to be more effective.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method and an apparatus for controlling an energy-saving LED mobile phone backlight, so as to more exactly solve the above problem of controlling the mobile phone backlight by using an energy-saving LED, and more effectively control the mobile phone backlight.
The invention is realized by the following technical scheme:
the invention provides a control method of an energy-saving LED mobile phone backlight source, which is characterized by comprising the following steps:
s1: calculating a current value of a mobile phone backlight, wherein the current value comprises, but is not limited to, a current of a mobile phone display screen and a current of a backlight LCD display screen;
s2: judging whether the current value is in a preset energy-saving current range or not;
s3: if not, regulating the brightness of the mobile phone backlight source according to the lowest brightness of the preset reference light source, counting the pixel numbers of the three primary colors of the mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard;
s4: if not, increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula;
s5: judging whether the intensity of a light source received by the LED photosensitive element is within a preset photosensitive range according to the receiving of the LED photosensitive element of the mobile phone backlight source to the ambient light;
S6: if yes, adjusting the light source intensity value according to the ambient light, and judging whether the adjusted current value of the mobile phone backlight source is in the energy-saving current range or not;
s7: if not, repeating the steps S3-S6 until the current value is ensured to be in the energy-saving current range.
Further, before the step S1, the method includes:
calculating the consumption potential energy of the mobile phone backlight source according to display data of an LCD display screen of the mobile phone backlight source within a preset time, wherein the display data comprise, but are not limited to, the potential energy of the mobile phone backlight source and the time used, and the consumption potential energy refers to the difference value of the potential energy of the mobile phone backlight source within a certain time range;
judging whether the consumption potential energy is within a preset difference range or not;
if not, the voltage value of the mobile phone backlight source is reduced, the potential energy of the mobile phone backlight source is reduced, and the consumed potential energy is reduced.
Further, before the step S3, the method includes:
the gray value data of the mobile phone display screen are obtained after Gamma correction of the three primary color values;
judging whether the gray value data are in gray balance or not according to the gray value data;
And if the gray value data exceeds the gray balance, reducing the gray value data according to the gray balance, and if the gray value data is lower than the gray balance, matching the gray value data into the brightness value of the mobile phone backlight source and adjusting the brightness value according to the gray balance.
Further, the adjusting the brightness of the mobile phone backlight according to the minimum brightness of the preset reference light source in step S3 includes:
constructing a two-dimensional coordinate axis of reference brightness, wherein an X axis is a brightness value and a Y axis is illumination duration;
positioning and matching the used time value in the display data of the LCD display screen of the mobile phone backlight source with the illumination duration time in the Y axis of the two-dimensional coordinate axis;
and obtaining a corresponding X-axis brightness value by using a linear function according to the matched Y-axis illumination duration value, setting the obtained X-axis brightness value as the lowest brightness of the reference light source, and adjusting the brightness value of the mobile phone backlight source.
Further, the counting the number of pixels of the three primary colors of the mobile phone display screen in the step S3 includes:
respectively acquiring the pixel numbers of the three primary colors of the mobile phone display screen, wherein the acquisition mode is to perform color separation on the bitmap image after screen capturing processing on the mobile phone display screen to obtain each pixel number of the three primary colors;
And comparing each pixel number in the three primary colors with the ICC standard pixel number, and judging whether the pixel number of each primary color reaches the ICC standard pixel number.
Further, in the step S4, the method includes:
substituting the pixel number of the three primary colors which does not reach the ICC standard pixel number into an ICC standard formula for calculation;
judging whether the calculation result V is in a preset range or not;
if not, comparing the pixel number of the three primary colors with a preset maximum pixel number and a preset minimum pixel number;
if the pixel number is larger than the maximum pixel number, the pixel number is adjusted to be a first preset pixel number, and if the pixel number is smaller than the minimum pixel number, the pixel number is adjusted to be a second preset pixel number;
and carrying out average distribution on the adjusted pixel numbers of the three primary colors to finish debugging.
Further, after the step S4, the method includes:
obtaining a voltage value of the mobile phone backlight source within a first preset time range to obtain a converted electric quantity;
judging whether the average load of the mobile phone backlight source exceeds the standard according to the converted electric quantity, wherein the average load is the ratio of the total electric quantity in unit time to the time;
and if the working value exceeds the standard, reducing the working value of the mobile phone backlight source within a second preset time range.
Further, in the step S5, the method includes:
setting an LED photosensitive element of the mobile phone backlight source to receive multi-angle ambient light refraction, wherein the multi-angle refers to that at least two photosensitive channels exist on the LED photosensitive element of the mobile phone backlight source and respectively receive ambient light in different directions;
detecting the intensity value of the light source of the received ambient light, and judging whether the received ambient light is in a preset photosensitive range or not;
if yes, the received ambient light is converted into an optical signal, and the brightness value of the mobile phone display screen is adjusted according to the optical signal.
Further, after the step of adjusting the brightness value of the mobile phone display screen according to the optical signal, the method includes:
judging whether the brightness value adjusted by the mobile phone display screen has blue light protection setting or not;
if yes, stopping the receiving of the ambient light by the LED photosensitive element of the mobile phone backlight, if not, judging that the current ambient light does not reach the regulation standard, backing up the intensity value of the light source, setting the intensity value as invalid light intensity, and regulating the brightness according to the preset blue light protection.
The invention provides a control device of an energy-saving LED mobile phone backlight source, which comprises:
The computing module is used for computing the current value of the mobile phone backlight source, wherein the current value comprises, but is not limited to, the current of the mobile phone display screen and the current of the backlight source LCD display screen;
the judging module is used for judging whether the current value is in a preset energy-saving current range or not;
the first judging module is used for adjusting the brightness of the mobile phone backlight source according to the lowest brightness of the preset reference light source if not, counting the pixel numbers of the three primary colors of the mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard;
the second judging module is used for increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula if not;
the receiving module is used for judging whether the light source intensity received by the LED photosensitive element is in a preset photosensitive range or not according to the receiving of the ambient light by the LED photosensitive element of the mobile phone backlight source;
the adjusting module is used for adjusting the light source intensity value according to the ambient light if the adjusted current value of the mobile phone backlight source is within the energy-saving current range;
and the repeating module is used for repeating the steps S3-S6 until the current value is ensured to be within the energy-saving current range if the current value is not in the energy-saving current range.
The application has the beneficial effects that:
1. the application provides an energy-saving mobile phone backlight source control method, which realizes more intelligent control and energy conservation of a mobile phone backlight source;
2. the energy-saving control provided by the application fully utilizes the adjustment of the ambient light to the backlight source of the mobile phone, so that the backlight source of the mobile phone is more attached to the ambient light in the process of adjusting the backlight source of the mobile phone, and the eyesight of a user is protected.
Drawings
FIG. 1 is an exploded view of a method of controlling an energy efficient LED handset backlight of the application;
fig. 2 is a schematic structural diagram of a control device for an energy-saving LED mobile phone backlight source according to the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to more clearly and completely describe the technical scheme of the application, the application is further described below with reference to the accompanying drawings.
Referring to fig. 1, the present application provides a method for controlling an energy-saving LED mobile phone backlight, comprising:
s1: calculating a current value of a mobile phone backlight, wherein the current value comprises, but is not limited to, a current of a mobile phone display screen and a current of a backlight LCD display screen;
s2: judging whether the current value is in a preset energy-saving current range or not;
S3: if not, regulating the brightness of the mobile phone backlight source according to the lowest brightness of the preset reference light source, counting the pixel numbers of the three primary colors of the mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard;
s4: if not, increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula;
s5: judging whether the intensity of a light source received by the LED photosensitive element is within a preset photosensitive range according to the receiving of the LED photosensitive element of the mobile phone backlight source to the ambient light;
s6: if yes, adjusting the light source intensity value according to the ambient light, and judging whether the adjusted current value of the mobile phone backlight source is in the energy-saving current range or not;
s7: if not, repeating the steps S3-S6 until the current values are all ensured to be in the energy-saving current range.
In the above steps, firstly, the current values of the mobile phone backlight source are calculated, when the calculation is carried out, the current values of the mobile phone display screen and the backlight source LCD display screen are required to be obtained respectively, the whole current value is counted, then, whether the current value is in a preset energy-saving current value range or not is judged, if yes, the operation control is carried out continuously on the current value, if not, the brightness value of the mobile phone backlight source is regulated according to the lowest brightness value of the preset reference light source, then, the pixel numbers of three primary colors of the mobile phone display screen are counted, whether the pixel numbers of the three primary colors all reach the ICC standard is judged, if not, the pixel numbers are increased or decreased according to the ICC standard, after the adjustment is completed, whether the light source intensity received by the LED light sensitive element is in the preset light sensitive range or not is judged, if the regulated current value of the mobile phone backlight source is not in the energy-saving current range is judged, and the steps S3-S6 are repeated until the current value is ensured to be in the energy-saving current range. The invention can realize the energy-saving control of the mobile phone backlight source according to the control of the current value, consumes less electric energy, combines the adjustment of the ambient light and the adjustment of the saturation in the control and adjustment process, so that the color displayed on the display screen of the mobile phone is more real, and the brightness of the mobile phone backlight source can be adjusted by adopting the circulation process, thereby ensuring that the mobile phone backlight source belongs to the energy-saving control.
In this embodiment, before step S1, the method includes:
calculating the consumption potential energy of the mobile phone backlight source according to display data of an LCD display screen of the mobile phone backlight source within a preset time, wherein the display data comprise, but are not limited to, the potential energy of the mobile phone backlight source and the time used, and the consumption potential energy refers to the difference value of the potential energy of the mobile phone backlight source within a certain time range;
judging whether the consumption potential energy is within a preset difference range or not;
if not, the voltage value of the mobile phone backlight source is reduced, the potential energy of the mobile phone backlight source is reduced, and the consumed potential energy is reduced.
In a specific embodiment, display data on an LCD display screen of a mobile phone backlight is acquired in the first minute, and acquired again after ten minutes, wherein the potential energy of the mobile phone backlight is counted in a list during the acquisition, the difference is calculated, the difference is not limited to a positive value and a negative value, the difference is processed in absolute value, whether the difference is within a preset difference range is judged after the value is obtained, the preset difference range is 3-6, when the difference is within the preset difference range, the current use of the mobile phone backlight is relatively stable, and when the difference is not within the preset difference range, the current use of the mobile phone backlight is in an unstable state, and the voltage is reduced by the formula W within the preset voltage range value 1 ＝U a -U b It can be seen that U b For initial voltage value, U a For regulated voltage value, when U a When the voltage is reduced, the overall potential energy is reduced, W Eliminating medicine ＝W 1 -W 2 At W 1 After reduction of W 2 For the initial time the potential is stable and constant, so the consumption potential is reduced.
In this embodiment, before step S3, the method includes:
the gray value data of the mobile phone display screen are obtained after Gamma correction of the three primary color values;
judging whether the gray value data are in gray balance or not according to the gray value data;
and if the gray value data exceeds the gray balance, reducing the gray value data according to the gray balance, and if the gray value data is lower than the gray balance, matching the gray value data into the brightness value of the mobile phone backlight source and adjusting the brightness value according to the gray balance.
In a specific embodiment, three primary color values of a mobile phone screen are obtained through a density detector, the obtained three primary color values are transmitted to a control end and are corrected through Gamma (the conversion process is called: RGB value and power are not simply linear relation, but power function relation, the index of the function is called Gamma value, generally 2.2), and the formula is that The Gray value of the mobile phone display screen is obtained, wherein Gray balance is calculated to obtain Gray as 128, gray balance can be determined, gray adjustment is carried out on the mobile phone display screen according to 128 if the calculated result is larger than 128, the calculated Gray value is required to be converted into the brightness value of the mobile phone display screen if the calculated Gray value is smaller than 128, and the brightness of the mobile phone display screen can be enabled to be in an average level and be more attached to the brightness value acceptable by human eyes according to the Gray balance.
In this embodiment, the adjusting the brightness of the mobile phone backlight according to the minimum brightness of the preset reference light source in step S3 includes:
constructing a two-dimensional coordinate axis of reference brightness, wherein an X axis is a brightness value and a Y axis is illumination duration;
positioning and matching the used time value in the display data of the LCD display screen of the mobile phone backlight source with the illumination duration time in the Y axis of the two-dimensional coordinate axis;
and obtaining a corresponding X-axis brightness value by using a linear function according to the matched Y-axis illumination duration value, setting the obtained X-axis brightness value as the lowest brightness of the reference light source, and adjusting the brightness value of the mobile phone backlight source.
In a specific embodiment, according to the Window Color Space (WCS) which is a color management platform, the earliest appears in the window vista, it aims to realize the color consistency of various software and hardware, the luminance value 0-240 is the coordinate value range of the X coordinate axis, the illumination duration unit of the Y axis is set to be small, wherein the Y axis is set to be 0 to infinite, and is in a continuously variable state, a two-dimensional coordinate axis of the reference light source is formed, the used time of the mobile phone backlight is obtained on the LCD display screen, the illumination time of the mobile phone backlight is matched to the Y axis value in the two-dimensional coordinate axis of the reference luminance, according to the luminance value which is determined by the total amount of light received by the preset sensor, the time is longer than the preset sensor, the luminance value can be matched with the time, that is, the y=x, the longer the luminance value is the higher, therefore the luminance value of the mobile phone backlight is obtained, the lowest luminance value of the window color space is the most matched with the mobile phone display screen, the color space is the best matched with the mobile phone display screen, that is the computer can be displayed in a sense of being more consistent, or the computer can be displayed in a sense when the computer is in a sense of being more consistent with the computer.
In this embodiment, the counting the number of pixels of the three primary colors of the mobile phone display in step S3 includes:
respectively acquiring the pixel numbers of the three primary colors of the mobile phone display screen, wherein the acquisition mode is to perform color separation on the bitmap image after screen capturing processing on the mobile phone display screen to obtain each pixel number of the three primary colors;
and comparing each pixel number in the three primary colors with the ICC standard pixel number, and judging whether the pixel number of each primary color reaches the ICC standard pixel number.
In a specific embodiment, the colors of the mobile phone display screen are superimposed by multiple colors, so that when the three primary colors (red, green and blue) are extracted to perform pixel number analysis, distinguishing statistics is needed, that is, firstly, one screenshot is performed on the mobile phone display screen, then, the current screenshot is converted into a bitmap image, during conversion, the screenshot is converted into a color mode, that is, RGB (representing colors of three channels of red, green and blue) is converted into CMYK (a color register mode adopted during color printing), each pixel number can be separated only in the color register mode, wherein the bitmap image is composed of single points called pixels (picture elements), the points can be arranged and dyed differently to form a pattern, that is, only the pixels in the image can be better separated out of each color, statistics is performed on the pixel numbers of the separated three primary colors, one by one color identification is performed, the color identification process includes color separation and superposition or subtraction, the color identification process follows the color addition and subtraction standard, if the pixel number of the three primary colors is equal to the ICC standard, and if the pixel number of the pixel number reaches the ICC standard value (picture element) and the ICC standard value reaches the color standard, the ICC standard can reach the color standard or not, and if the pixel number of the ICC standard reaches the color standard of the mobile phone can reach the standard.
In this embodiment, step S4 includes:
substituting the pixel number of the three primary colors which does not reach the ICC standard pixel number into an ICC standard formula for calculation;
judging whether the calculation result V is in a preset range or not;
if not, comparing the pixel number of the three primary colors with a preset maximum pixel number and a preset minimum pixel number;
if the pixel number is larger than the maximum pixel number, the pixel number is adjusted to be a first preset pixel number, and if the pixel number is smaller than the minimum pixel number, the pixel number is adjusted to be a second preset pixel number;
and carrying out average distribution on the adjusted pixel numbers of the three primary colors to finish debugging.
In a specific embodiment, the ICC is an international color organization (InternationalColor Consortium), a standard format of a color description file is established, which is called an ICC standard, when a color is converted in a computer peripheral product, the standard is used to correct the difference of the colors when describing the same color, so as to reduce the color difference or distortion possibly generated during color conversion, the calculated formula of the ICC standard value is v= [ rxbr+g+bχ255] ×100%, the calculated values are substituted into pixel values of three primary colors (red, green and blue), whether the calculated result is greater than 50% is judged, when 50% is reached, the pixel number of the three primary colors reaches the standard, if not reaching 50%, the pixel number of the three primary colors is required to be adjusted averagely, the maximum value of the pixel number of the three primary colors is 255, if one of the pixel numbers is equal to the maximum value 255, the pixel number of the three primary colors is reduced to a first preset pixel value 235, the pixel number of the maximum value is determined to be not saturated, the other pixel numbers are not saturated, if the other pixel numbers are not saturated, and if the pixel numbers of the three primary colors are not saturated, and the pixel numbers are set to be equal to the minimum value is 100, and the pixel numbers are reset to be equal to the minimum value to the maximum value, and the pixel numbers of the three primary colors are set to be saturated, and the pixel numbers are directly is 100.
In this embodiment, after step S4, the method includes:
obtaining a voltage value of the mobile phone backlight source within a first preset time range to obtain a converted electric quantity;
judging whether the average load of the mobile phone backlight source exceeds the standard according to the converted electric quantity, wherein the average load is the ratio of the total electric quantity in unit time to the time;
and if the working value exceeds the standard, reducing the working value of the mobile phone backlight source within a second preset time range.
In a specific embodiment, the voltage value is obtained every 2 minutes within a first preset time range of 20 minutes, wherein the voltage value is electrically obtainedThe voltage value is obtained by calculating according to the current value and the resistance value displayed on the LCD display screen of the mobile phone backlight source to obtain converted electric quantity, the converted electric quantity is added to obtain total electric quantity in a first preset time, the total electric quantity is compared with time to obtain the average load of the mobile phone backlight source, the average load is set to be 5.5MW, if the average load does not reach the standard, the work doing efficiency of the mobile phone backlight source is adjusted in a second preset time range, namely the work doing efficiency is more effectively performed in the second preset time range and is set to be a work doing half of the work doing in unit time, the voltage is reduced in the adjustment process, and the work doing efficiency is adjusted to be a half of the work doing value in unit time according to a formula J Work (work) ＝U 2 And x tr, under the condition that the time t and the resistor r are unchanged, the reduction of the voltage U can realize the reduction of the acting value, so that the average load is reduced to the standard value, and the energy-saving effect is achieved.
In this embodiment, step S5 includes:
setting an LED photosensitive element of the mobile phone backlight source to receive multi-angle ambient light refraction, wherein the multi-angle refers to that at least two photosensitive channels exist on the LED photosensitive element of the mobile phone backlight source and respectively receive ambient light in different directions;
detecting the intensity value of the light source of the received ambient light, and judging whether the received ambient light is in a preset photosensitive range or not;
if yes, the received ambient light is converted into an optical signal, and the brightness value of the mobile phone display screen is adjusted according to the optical signal.
In a specific embodiment, the LED light sensing element on the backlight of the mobile phone is provided with at least two light sensing channels, wherein the light sensing channels can be set to receive the ambient light in which direction, after receiving the ambient light, the light source intensity value detection is performed, wherein the preset library has RGB spectrum information, the RGB spectrum information of the ambient light is determined after the ambient light is obtained by the light source intensity value detection, the RGB spectrum information in the ambient light is obtained and matched with the sample RGB spectrum information to obtain the light source intensity value of the target ambient light, whether the target ambient light is within the preset light sensing range is judged, the preset light sensing range is that the ambient light ISO value is between 800 and 6400, when the ambient light ISO value is smaller than the preset light range, the ambient light ISO value is insufficient, excessive noise is generated, when the light source intensity value ISO is within the preset range, the received light is refracted, signal conversion is performed, after forming a light signal, brightness adjustment is performed on the display screen of the mobile phone according to the light source intensity value of the current ambient light, a better effect can be obtained according to the adjustment of the ambient light, and eyesight protection of a user can also be performed close to the ambient light.
In this embodiment, after the step of adjusting the brightness value of the mobile phone display screen according to the optical signal, the method includes:
judging whether the brightness value adjusted by the mobile phone display screen has blue light protection setting or not;
if yes, stopping the receiving of the ambient light by the LED photosensitive element of the mobile phone backlight, if not, judging that the current ambient light does not reach the regulation standard, backing up the intensity value of the light source, setting the intensity value as invalid light intensity, and regulating the brightness according to the preset blue light protection.
In a specific embodiment, after the adjustment of the ambient light, it is required to determine whether the blue light protection setting exists on the mobile phone display screen, where the blue light protection setting refers to that the blue light can prevent the eyes from being stimulated, and the harmful light in 385-445 nm band is properly blocked, so as to protect the eyesight of the user, and if the blue light protection is not achieved, it is indicated that the brightness value of the mobile phone display screen is too high, the ambient light is not received any more, and the ambient light can be regarded as ineffective light intensity to a certain extent, and further adjustment on the brightness of the mobile phone display screen is required according to the blue light protection setting.
In summary, the control method of the energy-saving LED mobile phone backlight provided by the invention firstly calculates and judges whether the current is in an energy-saving state, realizes the current control of the mobile phone backlight to achieve the energy-saving effect, adjusts the gray balance of the mobile phone when the current is in the energy-saving state for the first time, enables the brightness of the mobile phone display screen to be in an average level to be more consistent with a brightness value acceptable to human eyes according to the gray balance, adopts a windows color space when the brightness value is adjusted, ensures that the brightness of the mobile phone display screen is more consistent with the display color of a computer according to the color space, namely, can achieve a relatively consistent feeling when the computer is displayed or the mobile phone is displayed, selects an ICC standard to adjust the pixel number of three primary colors, enables the pixel number of the three primary colors to be in a saturated state, then detects the average load, ensures that the average load reaches the standard, finally adjusts according to the ambient light, and gets a better effect close to the ambient light.
Referring to fig. 2, the present invention provides a control device for an energy-saving LED mobile phone backlight, comprising:
a calculation module 10 for calculating a current value of the mobile phone backlight, wherein the current value includes, but is not limited to, a current of the mobile phone display screen and a current of the backlight LCD display screen;
the judging module 20 is configured to judge whether the current value is within a preset energy-saving current range;
the first determining module 30 is configured to adjust the brightness of the mobile phone backlight according to the minimum brightness of the preset reference light source, count the number of pixels of three primary colors of the mobile phone display screen, and determine whether the number of pixels of the three primary colors all reach the ICC standard;
a second determining module 40, configured to increase or decrease the number of pixels of the three primary colors according to an ICC standard formula if not;
the receiving module 50 is configured to determine, according to the reception of ambient light by the LED light sensing element of the mobile phone backlight, whether the intensity of the light source received by the LED light sensing element is within a preset light sensing range;
the adjusting module 60 is configured to adjust a light source intensity value according to the ambient light if the adjusted current value of the mobile phone backlight source is within the energy-saving current range;
And a repeating module 70, configured to repeat steps S3-S6 until the current value is ensured to be within the energy-saving current range if not.
In this embodiment, the calculation module 10 calculates the current value of the mobile phone backlight source first, the judgment module 20 judges whether the current value is within the energy-saving current, then the first judgment module 30 judges whether the current value is within the energy-saving current according to the reference light source, if not, the brightness of the mobile phone backlight source is adjusted, the number of pixels of the three primary colors is counted, whether the number of pixels of the three primary colors reaches the ICC standard is judged, if not, the number of pixels of the three primary colors is required to be increased or decreased according to the ICC standard formula, then the receiving module 50 receives the ambient light according to the LED photosensitive element of the mobile phone backlight source, judges whether the light source intensity of the received ambient light is within the preset photosensitive range, if yes, the adjustment module 60 adjusts the light source intensity value according to the ambient light, and judges whether the adjusted current value of the mobile phone backlight source is within the energy-saving current range, and if not, the steps S3-S6 are repeated until the current value is ensured to be within the energy-saving current range.
In one embodiment, the computing module 10 includes:
the computing sub-module is used for computing the consumption potential energy of the mobile phone backlight source according to the display data of the LCD display screen of the mobile phone backlight source in a preset time, wherein the display data comprise, but are not limited to, the potential energy of the mobile phone backlight source and the time used, and the consumption potential energy refers to the difference value of the potential energy of the mobile phone backlight source in a certain time range;
the first judging submodule is used for judging whether the consumption potential energy is in a preset difference range or not;
and the first judging sub-module is used for reducing the voltage value of the mobile phone backlight source if not, reducing the potential energy of the mobile phone backlight source and reducing the consumed potential energy.
In this embodiment, the calculation sub-module in the calculation module 10 acquires display data on the LCD display screen of the mobile phone backlight at the first minute, and acquires again after ten minutes, wherein the list statistics is performed on the potential energy of the mobile phone backlight at the time of acquisition, the calculation difference is not limited to positive and negative values, absolute value processing is performed on the difference, the first judgment sub-module judges whether the obtained value is within a preset difference range, Wherein the preset difference range is 3-6, the first determination submodule indicates that the current use of the mobile phone backlight is relatively stable when the preset difference range is within the preset difference range, and is in a stable state, and the current use of the mobile phone backlight is in an unstable state when the preset difference range is not within the preset difference range, and the voltage is reduced within the preset voltage range value by the formula W 1 ＝U a -U b It can be seen that U b For initial voltage value, U a For regulated voltage value, when U a When the voltage is reduced, the overall potential energy is reduced, W Eliminating medicine ＝W 1 -W 2 At W 1 After reduction of W 2 For the initial time the potential is stable and constant, so the consumption potential is reduced.
In one embodiment, the first determination module 30 includes:
the correction sub-module is used for acquiring gray value data of the mobile phone display screen, wherein the gray value data is obtained by correcting three primary color values through Gamma;
the second judging submodule is used for judging whether the gray value data are in gray balance or not according to the gray value data;
and the second judging sub-module is used for reducing the gray value data according to the gray balance if the gray value data exceeds the gray balance, matching the gray value data into the brightness value of the mobile phone backlight source if the gray value data is lower than the gray balance, and adjusting the brightness value according to the gray balance.
The building unit is used for building a two-dimensional coordinate axis of the reference brightness, wherein the X axis is a brightness value, and the Y axis is illumination duration;
the matching unit is used for carrying out positioning matching on the used time value in the display data of the LCD display screen of the mobile phone backlight source and the illumination duration time in the Y axis of the two-dimensional coordinate axis;
and the adjusting unit is used for obtaining a corresponding X-axis brightness value by using a linear function according to the matched Y-axis illumination duration value, setting the obtained X-axis brightness value as the lowest brightness of the reference light source and adjusting the brightness value of the mobile phone backlight source.
The acquisition unit is used for respectively acquiring the pixel numbers of the three primary colors of the mobile phone display screen, wherein the acquisition mode is to perform screen capturing processing on the mobile phone display screen according to the preset mode and then convert the screen capturing processing into a bitmap image for color separation, so as to obtain each pixel number of the three primary colors;
and the comparison unit is used for comparing each pixel number in the three primary colors with the ICC standard pixel number and judging whether the pixel number of each primary color reaches the ICC standard pixel number.
In this embodiment, the correction submodule of the first determination module 30 obtains the color values of the three primary colors of the mobile phone screen through the density detector, and transmits the obtained color values of the three primary colors to the control end through the Gamma correction formula Gray = 2.2 R 2.2 +1.5G 2.2 +0.6B 2.2 1+1.5 2.2 +0.6 2.2 The method comprises the steps of obtaining a gray value of a mobile phone display screen, a second judging submodule, judging whether the gray value is in a gray balance standard value 128 or not, if the calculated result is larger than 128, carrying out gray adjustment on the mobile phone display screen according to the 128, if the calculated result is smaller than 128, obtaining a minimum brightness value of the mobile phone backlight according to a formula after converting the calculated result into a percentage value, adjusting according to gray balance, a construction unit converting a current screenshot into an image according to a bitmap image, carrying out a pixel point of an ICC unit according to an acquired primary color image, and judging whether the pixel point of the ICC unit reaches a standard value or not according to a bitmap image, wherein the Y-axis is set to be 0 to an infinite value and is in a continuously variable state, a two-dimensional coordinate axis of a reference light source is formed, the matching unit acquires the used time of the mobile phone backlight on the LCD display screen, the adjusting unit obtains the minimum brightness value of the mobile phone backlight according to a linear function y=x, carrying out screenshot according to a formula, and the acquisition unit carries out a screenshot according to the bitmap image, and judging whether the pixel point of the ICC unit reaches the standard value of each pixel point of the primary color image is equal to 155.
In one embodiment, the second determination module 40 includes:
a calculation unit configured to perform calculation by substituting the number of pixels of the three primary colors, which do not reach the ICC standard pixel number, into an ICC standard formula v= [ r×g×br+g+b×255] ×100%;
the first judging unit is used for judging whether the calculation result V is in a preset range or not;
a first determination unit, configured to compare the number of pixels of the three primary colors with a preset maximum number of pixels and a preset minimum number of pixels if not;
the second judging unit is used for adjusting the pixel number to be a first preset pixel number if the pixel number is larger than the maximum pixel number, and adjusting the pixel number to be a second preset pixel number if the pixel number is smaller than the minimum pixel number;
the distribution unit is used for carrying out average distribution on the adjusted pixel numbers of the three primary colors to finish debugging;
the acquisition sub-module is used for acquiring the voltage value of the mobile phone backlight source within a first preset time range to obtain the converted electric quantity;
the third judging sub-module is used for judging whether the average load of the mobile phone backlight source exceeds the standard according to the converted electric quantity, wherein the average load is the ratio of the total electric quantity in unit time to the time;
and the third judging sub-module is used for reducing the acting value of the mobile phone backlight source within a second preset time range if the third judging sub-module exceeds the standard.
In this embodiment, the calculation unit in the debug module substitutes pixel values of three primary colors (red, green, and blue) to calculate, and the calculation formula of the ICC standard value is v= [ r×g×br+g+b×255]X 100%, a first judging unit for calculating the pixel values of the three primary colors (red, green and blue) and judging whether the calculated result is more than 50%, the first judging unit indicating that the number of the pixels of the three primary colors has reached the standard after 50% is reached, if 50% is not reached, the average adjustment of the number of the pixels of the three primary colors is required, a second judging unit for comparing the number of the pixels of the three primary colors with the maximum value, if one of the numbers of the pixels is equal to the maximum value 255, the average adjustment of the number of the pixels of the three primary colors is required, the maximum value of the number of the pixels of the three primary colors is 255, and if one of the numbers of the pixels is equal to the maximum value of the number of the pixels of the three primary colorsThe pixel number reaching the maximum value is reduced to 235, the pixel number of the color is determined not to be excessively saturated so as to influence the display degree of the rest colors, if one pixel number is smaller than 100, the pixel number smaller than 100 is directly truncated, the minimum value is raised to 155, after adjustment is completed, the distribution unit carries out average value calculation and resets the pixel numbers of the three primary colors so that the three primary colors are in a saturated and average state, the acquisition submodule is 20 minutes in a first preset time range, voltage values are acquired every 2 minutes, wherein the acquisition of the voltage values is carried out according to the current values and the resistance values displayed on the LCD display screen of the mobile phone backlight source, the converted electric quantity is obtained, the third judgment submodule is used for adding the converted electric quantities and obtaining average load after the ratio, judging whether the average load is exceeded or not is 5.5MW, if the average load is exceeded, the work efficiency of the mobile phone backlight source is adjusted within a second preset time range, that the work efficiency is more effectively worked within the second preset time range is that the work efficiency is adjusted within the unit time range, the work efficiency is adjusted within the second preset time range, the work efficiency is adjusted within the unit time range, the work efficiency is adjusted within the work efficiency is half the value, the work is adjusted according to the value, and the voltage is reduced by J, the adjustment process is carried out according to the formula, the voltage is reduced by J Work (work) ＝U 2 And x tr, under the condition that the time t and the resistor r are unchanged, the reduction of the voltage U can realize the reduction of the acting value, so that the average load is reduced to the standard value, and the energy-saving effect is achieved.
In one embodiment, the receiving module 50 includes:
the receiving unit is used for setting the LED photosensitive element of the mobile phone backlight to receive multi-angle ambient light refraction, wherein the multi-angle refers to that at least two photosensitive channels exist on the LED photosensitive element of the mobile phone backlight to respectively receive ambient light in different directions;
the second judging unit is used for detecting the intensity value of the light source of the received ambient light and judging whether the received ambient light is in a preset photosensitive range or not;
the second judging unit is used for converting the received ambient light into an optical signal if the received ambient light is positive, and adjusting the brightness value of the mobile phone display screen according to the optical signal;
the judging subunit is used for judging whether the brightness value adjusted by the mobile phone display screen has blue light protection setting or not;
and the judging subunit is used for stopping the receiving of the LED photosensitive element of the mobile phone backlight source to the ambient light if the ambient light is yes, judging that the current ambient light does not reach the regulation standard if the ambient light is not yes, backing up the intensity value of the light source, setting the intensity value as invalid light intensity, and regulating the brightness according to the preset blue light protection.
In this embodiment, the receiving unit in the receiving module 50 is provided with at least two light-sensing channels, where the light-sensing channels can set which direction of receiving the ambient light, and receive the ambient light, the second judging unit detects the intensity value of the light source, judges whether the ambient light is within a preset light-sensing range, when the intensity value of the light source ISO is within the preset range, the light is received and refracted, performs signal conversion, and after forming a light signal, performs brightness adjustment on the mobile phone display screen according to the intensity value of the current ambient light, the judging subunit judges whether the mobile phone display screen has a blue light protection setting, where the blue light protection setting indicates that the blue light can be prevented from irritating eyes, and if the brightness value of the mobile phone display screen is too high, the ambient light is not received any more, and the ambient light can be regarded as light intensity to a certain extent, and further adjustment on the brightness of the mobile phone display screen is required according to the blue light protection setting.
In summary, the control method and the device for the energy-saving LED mobile phone backlight provided by the invention realize more intelligent control and energy conservation of the mobile phone backlight, and the proposed energy-saving control fully utilizes the adjustment of the environmental light to the mobile phone backlight, so that the mobile phone backlight is more attached to the environmental light in the adjustment process, and vision protection is provided for users.
Of course, the present invention can be implemented in various other embodiments, and based on this embodiment, those skilled in the art can obtain other embodiments without any inventive effort, which fall within the scope of the present invention.

Claims (10)

1. The control method of the energy-saving LED mobile phone backlight source is characterized by comprising the following steps of:
s1: calculating a current value of a mobile phone backlight, wherein the current value comprises, but is not limited to, a current of a mobile phone display screen and a current of a backlight LCD display screen;
s2: judging whether the current value is in a preset energy-saving current range or not;
s3: if not, regulating the brightness of the mobile phone backlight source according to the lowest brightness of the preset reference light source, counting the pixel numbers of the three primary colors of the mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard;
s4: if not, increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula;
s5: judging whether the intensity of a light source received by the LED photosensitive element is within a preset photosensitive range according to the receiving of the LED photosensitive element of the mobile phone backlight source to the ambient light;
s6: if yes, adjusting the light source intensity value according to the ambient light, and judging whether the adjusted current value of the mobile phone backlight source is in the energy-saving current range or not;
S7: if not, repeating the steps S3-S6 until the current value is ensured to be in the energy-saving current range.
2. The method for controlling the backlight of an energy-saving LED mobile phone according to claim 1, wherein before step S1, the method comprises:
calculating the consumption potential energy of the mobile phone backlight source according to display data of an LCD display screen of the mobile phone backlight source within a preset time, wherein the display data comprise, but are not limited to, the potential energy of the mobile phone backlight source and the time used, and the consumption potential energy refers to the difference value of the potential energy of the mobile phone backlight source within a certain time range;
judging whether the consumption potential energy is within a preset difference range or not;
if not, the voltage value of the mobile phone backlight source is reduced, the potential energy of the mobile phone backlight source is reduced, and the consumed potential energy is reduced.
3. The method for controlling the backlight of an energy-saving LED mobile phone according to claim 1, wherein before step S3, the method comprises:
the gray value data of the mobile phone display screen are obtained after Gamma correction of the three primary color values;
judging whether the gray value data are in gray balance or not according to the gray value data;
And if the gray value data exceeds the gray balance, reducing the gray value data according to the gray balance, and if the gray value data is lower than the gray balance, matching the gray value data into the brightness value of the mobile phone backlight source and adjusting the brightness value according to the gray balance.
4. The method for controlling an energy-saving LED mobile phone backlight according to claim 1, wherein the adjusting the brightness of the mobile phone backlight according to the minimum brightness of the preset reference light source in step S3 comprises:
constructing a two-dimensional coordinate axis of reference brightness, wherein an X axis is a brightness value and a Y axis is illumination duration;
positioning and matching the used time value in the display data of the LCD display screen of the mobile phone backlight source with the illumination duration time in the Y axis of the two-dimensional coordinate axis;
and obtaining a corresponding X-axis brightness value by using a linear function according to the matched Y-axis illumination duration value, setting the obtained X-axis brightness value as the lowest brightness of a reference light source, and adjusting the brightness value of the mobile phone backlight source.
5. The method for controlling the backlight of the energy-saving LED mobile phone according to claim 1, wherein the counting of the number of pixels of the three primary colors of the mobile phone display screen in the step S3 includes:
Respectively acquiring the pixel numbers of the three primary colors of the mobile phone display screen, wherein the acquisition mode is to perform color separation on the bitmap image after screen capturing processing on the mobile phone display screen to obtain each pixel number of the three primary colors;
and comparing each pixel number in the three primary colors with the ICC standard pixel number, and judging whether the pixel number of each primary color reaches the ICC standard pixel number.
6. The method for controlling the backlight of an energy-saving LED mobile phone according to claim 1, wherein in step S4, the method comprises:
substituting the pixel number of the three primary colors which does not reach the ICC standard pixel number into an ICC standard formula V= [ R×G×BR+G+B×255] ×100% for calculation;
judging whether the calculation result V is in a preset range or not;
if not, comparing the pixel number of the three primary colors with a preset maximum pixel number and a preset minimum pixel number;
if the pixel number of the three primary colors is larger than the maximum pixel number, the pixel number is adjusted to be a first preset pixel number, and if the pixel number is smaller than the minimum pixel number, the pixel number is adjusted to be a second preset pixel number;
and carrying out average distribution on the adjusted pixel numbers of the three primary colors to finish debugging.
7. The method for controlling the backlight of an energy-saving LED mobile phone according to claim 1, wherein after step S4, the method comprises:
obtaining a voltage value of the mobile phone backlight source within a first preset time range to obtain a converted electric quantity;
judging whether the average load of the mobile phone backlight source exceeds the standard according to the converted electric quantity, wherein the average load is the ratio of the total electric quantity in unit time to the time;
and if the working value exceeds the standard, reducing the working value of the mobile phone backlight source within a second preset time range.
8. The method for controlling the backlight of an energy-saving LED mobile phone according to claim 1, wherein in step S5, the method comprises:
setting an LED photosensitive element of the mobile phone backlight source to receive multi-angle ambient light refraction, wherein the multi-angle refers to that at least two photosensitive channels exist on the LED photosensitive element of the mobile phone backlight source and respectively receive ambient light in different directions;
detecting the intensity value of the light source of the received ambient light, and judging whether the received ambient light is in a preset photosensitive range or not;
if yes, the received ambient light is converted into an optical signal, and the brightness value of the mobile phone display screen is adjusted according to the optical signal.
9. The method for controlling an energy-saving LED mobile phone backlight according to claim 8, wherein after the step of adjusting the brightness value of the mobile phone display according to the optical signal, the method comprises:
judging whether the brightness value adjusted by the mobile phone display screen has blue light protection setting or not;
if yes, stopping the receiving of the ambient light by the LED photosensitive element of the mobile phone backlight, if not, judging that the current ambient light does not reach the regulation standard, backing up the intensity value of the light source, setting the intensity value as invalid light intensity, and regulating the brightness according to the preset blue light protection.
10. The control device of the energy-saving type LED mobile phone backlight source is applied to the control method of the energy-saving type LED mobile phone backlight source in claim 1, and is characterized by comprising the following steps:
the computing module is used for computing the current value of the mobile phone backlight source, wherein the current value comprises, but is not limited to, the current of the mobile phone display screen and the current of the backlight source LCD display screen;
the judging module is used for judging whether the current value is in a preset energy-saving current range or not;
the first judging module is used for adjusting the brightness of the mobile phone backlight source according to the lowest brightness of the preset reference light source if not, counting the pixel numbers of the three primary colors of the mobile phone display screen, and judging whether the pixel numbers of the three primary colors all reach the ICC standard;
The second judging module is used for increasing and decreasing the pixel number of the three primary colors according to an ICC standard formula if not;
the receiving module is used for judging whether the light source intensity received by the LED photosensitive element is in a preset photosensitive range or not according to the receiving of the ambient light by the LED photosensitive element of the mobile phone backlight source;
the adjusting module is used for adjusting the light source intensity value according to the ambient light if the adjusted current value of the mobile phone backlight source is within the energy-saving current range;
and the repeating module is used for repeating the steps S3-S6 until the current value is ensured to be within the energy-saving current range if the current value is not in the energy-saving current range.
CN202310707056.XA 2023-06-15 2023-06-15 Control method and device for energy-saving LED mobile phone backlight source Pending CN116665606A (en)

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Application Number Priority Date Filing Date Title
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