WO2014201958A1 - 调整屏幕背光亮度的方法和装置以及终端 - Google Patents

调整屏幕背光亮度的方法和装置以及终端 Download PDF

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Publication number
WO2014201958A1
WO2014201958A1 PCT/CN2014/079561 CN2014079561W WO2014201958A1 WO 2014201958 A1 WO2014201958 A1 WO 2014201958A1 CN 2014079561 W CN2014079561 W CN 2014079561W WO 2014201958 A1 WO2014201958 A1 WO 2014201958A1
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WIPO (PCT)
Prior art keywords
brightness
screen backlight
backlight brightness
frame
current frame
Prior art date
Application number
PCT/CN2014/079561
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English (en)
French (fr)
Inventor
杨泓
Original Assignee
华为终端有限公司
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Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Publication of WO2014201958A1 publication Critical patent/WO2014201958A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/0653Controlling or limiting the speed of brightness adjustment of the illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present invention relates to the field of communications, and more particularly to a method and apparatus for adjusting the brightness of a screen backlight and a terminal.
  • backlighting is a form of illumination that is often used on liquid crystal displays.
  • the LCD screen itself does not emit light. It is necessary to set the backlight source behind the LCD screen. Therefore, the LCD screen passes the light from the "blocking" and “turning on” the backlight source through the fine liquid crystal particles arranged on the screen. Reach the restore screen. Therefore, the brightness of the screen backlight directly affects the brightness of the screen.
  • the brightness of the screen backlight of the mobile terminal can be automatically adjusted.
  • the phone automatically adjusts the brightness of the screen backlight, it usually uses a gradual change, and the adjustment speed is fixed.
  • the screen backlight brightness will change by one unit of brightness each time the screen is refreshed. Specifically, when the brightness of the screen backlight needs to be raised from C to D, the screen is refreshed according to a certain frequency. Each time the screen is refreshed, the brightness of the screen backlight is increased by one unit brightness until the brightness from the initial brightness C to the target brightness D, the brightness of the screen backlight.
  • the change stops only; or, when the brightness of the screen backlight needs to be reduced from the initial brightness E to the target brightness F, the screen is refreshed according to a certain frequency, and the brightness of the screen backlight is decremented by one unit brightness every time it is refreshed, until the brightness is lowered from the initial brightness E to the target brightness. F, the change in screen backlight brightness stops. It can be seen that the adjustment speed of the screen backlight brightness is fixed.
  • the adaptability and sensitivity of the human eye at different brightnesses are different.
  • the human eye adapts to the dark environment for a longer period of time, while the adaptation to the bright environment takes less time.
  • the sensitivity of the human eye is higher, and it is easier to capture a slight change in brightness, and as the brightness is increased, the human eye Sensitivity decreases.
  • the human eye may feel the change in screen brightness in some scenes.
  • Embodiments of the present invention provide a method and apparatus for adjusting the brightness of a screen backlight and a terminal.
  • the human eye may not feel the change of the brightness of the screen backlight.
  • a method for adjusting brightness of a screen backlight including: determining an initial value and a target value of brightness of the screen backlight; and brightness according to a brightness of a screen backlight from a frame of the current frame The amount of change, adjusting the brightness of the screen backlight of the next frame until the brightness of the screen backlight is adjusted from the initial value to the target value, wherein the screen backlight brightness of the current frame is toward the next
  • the amount of change in brightness of the screen backlight brightness of the frame is related to one or a combination of the following factors: screen backlight brightness and ambient light level of the current frame.
  • the screen backlight of the next frame is changed according to a brightness change amount when a screen backlight brightness of a current frame changes from a screen backlight brightness of a current frame
  • the brightness is adjusted until the brightness of the screen backlight is adjusted from the initial value to the target value, including: determining, according to the screen backlight brightness of the current frame and/or the ambient light brightness, from the current frame The amount of change in brightness of the screen backlight brightness to the brightness of the screen backlight of the next frame; determining the brightness of the screen backlight of the next frame based on the brightness of the screen backlight of the current frame and the amount of change in brightness;
  • the screen backlight brightness is adjusted from the initial value to the target value.
  • the screen backlight brightness of the next frame is determined based on a screen backlight brightness of the current frame and the brightness change amount
  • the method includes: when the target value is greater than the initial value, when determining a screen backlight brightness of the nth frame and a brightness change amount from a screen backlight brightness of the nth frame to a screen backlight brightness of the n+1th frame And a target value greater than or equal to the brightness of the screen backlight, determining that the screen backlight brightness of the (n+1)th frame is a target value of the brightness of the screen backlight, wherein the screen backlight of the nth frame is bright a degree of screen backlight brightness of the current frame, a screen backlight brightness of the n+1th frame is a screen backlight brightness of the next frame; or when the target value is greater than the initial value, when determining an nth frame Determining the n+1th when the sum of the screen backlight brightness and the brightness
  • the screen backlight brightness of the next frame is determined based on a screen backlight brightness of the current frame and the brightness change amount
  • the method includes: when the target value is less than the initial value, when determining a screen backlight brightness of the nth frame and a brightness change amount from a screen backlight brightness of the nth frame to a screen backlight brightness of the n+1th frame And determining, by a target value greater than or equal to the brightness of the screen backlight, determining a screen backlight brightness of the n+1th frame as a sum of a screen backlight brightness of the nth frame and the brightness change amount, wherein the nth frame
  • the brightness of the screen backlight is the brightness of the screen backlight of the current frame
  • the brightness of the screen backlight of the n+1th frame is the brightness of the screen backlight of the next frame
  • the target value is smaller than the initial value
  • a screen backlight brightness of the n+1th frame is a target value of the screen backlight brightness, wherein a screen backlight brightness of the nth frame is a screen backlight brightness of the current frame, the n+1th frame
  • the screen backlight brightness is the screen backlight brightness of the next frame.
  • the determining, according to the brightness of the screen backlight of the current frame and/or the brightness of the ambient light determining The amount of change in brightness of the screen backlight brightness of the current frame to the brightness of the screen backlight of the next frame, comprising: determining the brightness change amount according to the screen backlight brightness of the current frame; or according to the ambient light brightness Determining the brightness change amount; or determining the brightness change amount according to the screen backlight brightness of the current frame and the ambient light brightness.
  • the N / C ⁇ range is between 0. 01-1
  • M / C 2 range is 0. 005-0 Between 1 and 1.
  • a method for adjusting brightness of a screen backlight including: determining a brightness of a screen backlight of a current frame; determining a screen backlight from the current frame according to a screen backlight brightness and/or an ambient light brightness of the current frame The brightness change amount when the brightness of the screen backlight of the next frame changes; the screen backlight brightness of the current frame is adjusted to the screen of the next frame according to the screen backlight brightness of the current frame and the brightness change amount Backlight brightness.
  • the determining, according to the screen backlight brightness and/or the ambient light brightness of the current frame determining a screen backlight brightness from the current frame to a frame
  • the amount of change in brightness of the brightness of the screen backlight is changed, including: determining the amount of change in brightness according to brightness of the screen backlight of the current frame; or determining the amount of change in brightness according to the brightness of the ambient light; or according to the current
  • the brightness of the brightness of the screen is determined by the brightness of the screen backlight of the frame and the brightness of the ambient light.
  • the brightness of the screen backlight of the current frame is adjusted according to the screen backlight brightness of the current frame and the brightness change amount. Determining the brightness of the screen backlight of the next frame, comprising: determining a screen backlight brightness of the current frame and a screen backlight brightness from the current frame to the next frame when a target value of the screen backlight brightness is greater than an initial value The difference between the target value and the screen backlight brightness of the current frame, from the current frame, if the sum of the brightness change amounts when the screen backlight brightness changes is greater than or equal to the target value of the screen backlight brightness The brightness of the screen backlight is adjusted to the brightness of the screen backlight of the next frame; or when the target value of the brightness of the screen backlight is greater than the initial value, determining the brightness of the screen backlight of the current frame and the brightness of the screen backlight from the current frame In the case where the sum of the amount of change in luminance when the brightness of the screen backlight
  • the screen backlight from the current frame is according to the screen backlight brightness of the current frame and the brightness change amount Adjusting the brightness of the screen backlight of the next frame to include: when the target value of the brightness of the screen backlight is less than an initial value, determining the brightness of the screen backlight of the current frame and the brightness of the screen backlight from the current frame In the case where the sum of the brightness change amounts when the screen backlight brightness of the next frame is changed is greater than or equal to the target value of the screen backlight brightness, the screen backlight brightness of the current frame is adjusted to the brightness according to the brightness change amount.
  • an apparatus for adjusting brightness of a screen backlight including: a first determining unit, configured to determine an initial value and a target value of brightness of the screen backlight; and a first adjusting unit, configured to The backlight brightness is adjusted by the brightness change of the screen backlight brightness of the next frame, and the screen backlight brightness of the next frame is adjusted until the screen backlight brightness is adjusted from the initial value to the target value, wherein And a brightness change amount of the screen backlight brightness of the current frame to the screen brightness of the next frame is related to one or a combination of the following factors: a screen backlight brightness and an ambient light brightness of the current frame.
  • the first adjusting unit includes: a first determining module, configured to determine, according to a screen backlight brightness of the current frame and/or the ambient light brightness a brightness change amount when the brightness of the screen backlight of the current frame changes to the brightness of the screen backlight of the next frame; a second determining module, configured to determine, according to the screen backlight brightness of the current frame and the brightness change amount The screen backlight brightness of the next frame until the screen backlight brightness is adjusted from the initial value to the target value.
  • the second determining module is configured to: when the target value is greater than the initial value, determine a screen backlight brightness of an nth frame Determining the n+1th frame with a target value that is greater than or equal to a target value of the brightness of the screen backlight when the screen backlight brightness of the nth frame changes to the screen backlight brightness of the (n+1)th frame
  • the screen backlight brightness is a target value of the screen backlight brightness, wherein the screen backlight brightness of the nth frame is the screen backlight brightness of the current frame, and the screen backlight brightness of the n+1th frame is the next frame Screen backlight brightness; or when the target value is greater than the initial value, when determining the screen backlight brightness of the nth frame and the screen backlight brightness from the nth frame to the screen backlight brightness of the n+1th frame Determining, by a sum of the brightness change amounts, a target value of the brightness of the screen backlight
  • the second determining module is configured to: when the target value is smaller than the initial value, when determining a screen backlight brightness of the nth frame Determining the n+1th frame with a target value that is greater than or equal to a target value of the brightness of the screen backlight when the screen backlight brightness of the nth frame changes to the screen backlight brightness of the (n+1)th frame
  • the screen backlight brightness is the sum of the screen backlight brightness of the nth frame and the brightness change amount, wherein the screen backlight brightness of the nth frame is the screen backlight brightness of the current frame, and the n+1th frame
  • the screen backlight brightness is the screen backlight brightness of the next frame; or when the target value is less than the initial value, when determining the screen backlight brightness of the nth frame and the screen backlight brightness from the nth frame to the n+th Determining, by the target value of the brightness of the screen backlight when the brightness of the
  • the first determining module is configured to: determine the brightness according to a screen backlight brightness of the current frame And determining the brightness change amount according to the ambient light brightness; or determining the brightness change amount according to the screen backlight brightness of the current frame and the ambient light brightness.
  • the N / C ⁇ range is between 0. 01-1
  • M / C 2 range is 0. 005-0 Between 1 and 1.
  • a terminal including: a detecting device, configured to determine a brightness of a screen backlight of a current frame; and a control device, configured to determine, according to a screen backlight brightness and/or an ambient light brightness of the current frame, The amount of brightness change of the screen backlight of the current frame when the brightness of the screen backlight of the next frame changes; the driving device, for the screen backlight from the current frame according to the screen backlight brightness of the current frame and the brightness variation The brightness is adjusted to the screen backlight brightness of the next frame.
  • control device is configured to: determine, according to a screen backlight brightness of the current frame, the brightness change amount; or determine, according to the ambient light brightness, The brightness change amount is determined; or the brightness change amount is determined according to the screen backlight brightness of the current frame and the ambient light brightness.
  • the driving device is configured to: when the target value of the brightness of the screen backlight is greater than an initial value, determine a screen of the current frame In a case where the sum of the backlight brightness and the brightness change amount when the screen backlight brightness of the current frame changes to the screen backlight brightness of the next frame is greater than or equal to the target value of the screen backlight brightness, according to the target value a difference from a screen backlight brightness of the current frame, a screen backlight brightness from the current frame to a screen backlight brightness of the next frame; or when the screen backlight brightness
  • the target value is greater than the initial value, and the sum of the brightness of the screen backlight when the current frame is changed from the screen backlight brightness of the current frame to the brightness of the screen backlight of the next frame is smaller than the screen backlight.
  • the screen backlight brightness of the current frame is adjusted to the screen backlight brightness of the next frame according to the brightness change amount.
  • the driving device is configured to: when the target value of the brightness of the screen backlight is less than an initial value, determine a screen of the current frame In the case where the sum of the brightness of the backlight and the amount of change in brightness when the brightness of the screen backlight of the current frame changes to the brightness of the screen backlight of the next frame is greater than or equal to the target value of the brightness of the screen backlight, the brightness changes according to the brightness The amount of the screen backlight from the current frame is adjusted to the screen backlight brightness of the next frame; or when the target value of the screen backlight brightness is less than the initial value, determining the screen backlight brightness and the current frame of the current frame In the case where the sum of the brightness of the screen backlight of the current frame to the brightness of the screen backlight of the next frame is smaller than the target value of the brightness of the screen backlight, the target value and the screen of the current frame are The difference in backlight brightness is adjusted from the screen backlight brightness of
  • the brightness of the screen backlight and/or the ambient light brightness are taken into consideration in the process of adjusting the brightness of the screen backlight, so that the brightness of the screen backlight is changed more smoothly, so that the human eye may not feel the change of the brightness of the screen backlight.
  • FIG. 1 is a flow chart of a method of adjusting screen brightness in accordance with one embodiment of the present invention.
  • FIG. 2 is a flow chart of a method of adjusting screen brightness in accordance with another embodiment of the present invention.
  • FIG. 3 is an effect diagram of scene one according to the first embodiment of the present invention.
  • 4 is an effect diagram of scene two according to the first embodiment of the present invention.
  • Fig. 5 is an effect diagram of scene three according to the first embodiment of the present invention.
  • Fig. 6 is an effect diagram of a scene four according to the first embodiment of the present invention.
  • FIG. 7 is an effect diagram of scene one according to a second embodiment of the present invention.
  • FIG. 8 is an effect diagram of scene two according to a second embodiment of the present invention.
  • FIG. 9 is an effect diagram of a scene three according to a second embodiment of the present invention.
  • Figure 10 is an effect diagram of a scene four according to a second embodiment of the present invention.
  • Figure 11 is an effect diagram of scene one according to a third embodiment of the present invention.
  • Figure 12 is an effect diagram of scene two according to a third embodiment of the present invention.
  • Fig. 13 is an effect diagram of scene three according to the third embodiment of the present invention.
  • Figure 14 is an effect diagram of a scene four according to a third embodiment of the present invention.
  • Figure 15 is a block diagram showing the structure of an apparatus for adjusting the brightness of a screen according to an embodiment of the present invention.
  • Figure 16 is a block diagram showing the structure of a first adjusting unit in an apparatus for adjusting the brightness of a screen according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the embodiment of the invention adjusts the gradual process of the brightness of the screen backlight based on the brightness of the screen backlight and the brightness of the ambient light, the brightness of the screen backlight or the brightness of the ambient light, so that the human eye may not You will feel the change in the brightness of the screen backlight.
  • FIG. 1 illustrates a method of adjusting the brightness of a screen backlight in accordance with one embodiment of the present invention. As shown in Figure 1, the method includes:
  • the brightness of the ambient light can be detected by a light sensor to determine an initial value of the brightness of the screen backlight.
  • the brightness of the ambient light can be obtained according to the corresponding relationship between the brightness of the ambient light and the brightness of the screen backlight.
  • the brightness of the screen backlight; or, the target value of the brightness of the screen backlight may be determined according to the ambient light brightness.
  • the correspondence between the brightness of the ambient light and the brightness of the backlight of the screen can be determined by different algorithms, or can be determined by looking up the table.
  • the algorithm herein can refer to the algorithm in the CIE 1976 standard. Of course, other algorithms in the prior art can also be used.
  • the adjustable range of screen backlight brightness is different. For example, some screen backlight brightness can be adjusted from 0-255 to 256 steps. Or, some screen backlights can be adjusted from 0-127 to 128 steps.
  • the following examples are all exemplified by an adjustable range of 256-step screen backlight brightness.
  • the ambient light brightness is l OOOOlux
  • the corresponding screen backlight brightness is 255.
  • the ambient light brightness is 4001ux
  • the corresponding screen backlight brightness is 80.
  • the ambient light brightness is l lux and the corresponding screen backlight brightness is 6.
  • lux is the unit of brightness, that is, the illumination intensity that can be accepted at a distance of 1 meter from a light source with a light intensity of 1 candela (cd).
  • the method may further include: detecting the ambient light brightness.
  • a frame refers to a derivative of a refresh rate of a liquid crystal display (LCD, Liquid Crystal).
  • LCD liquid crystal display
  • n is a positive integer greater than or equal to one.
  • n is incremented by 1 every time the LCD is refreshed.
  • the brightness of the screen backlight of the current frame is changed according to one of the following factors or a combination thereof: the screen backlight brightness and the ambient light brightness of the current frame are: The screen backlight brightness of the current frame is related, the amount of brightness change is related to the ambient light level, or the amount of brightness change is related to the screen backlight brightness and the ambient light level of the current frame.
  • first determining, according to the screen backlight brightness of the current frame and/or the ambient light brightness, a brightness change amount when the screen backlight brightness of the current frame changes to the screen backlight brightness of the next frame; And determining, according to the screen backlight brightness of the current frame and the brightness change amount, the screen backlight brightness of the next frame until the screen backlight brightness is adjusted from the initial value to the target value. That is, based on the brightness of the screen backlight of the current frame, the brightness of the screen backlight of the next frame is determined, thereby adjusting the brightness of the screen backlight frame by frame.
  • the screen backlight brightness of the current frame is expressed by the screen backlight brightness of the nth frame
  • the screen backlight brightness of the next frame is expressed by the screen backlight brightness of the (n+1)th frame.
  • the target value B is greater than the initial value A
  • the sum of the brightness of the screen backlight when the nth frame is changed from the screen backlight brightness of the nth frame to the brightness of the screen backlight of the n+1th frame is determined.
  • the screen backlight brightness of the nth frame is determined to change from the screen backlight brightness of the nth frame to the screen backlight brightness of the n+1th frame
  • the sum of the brightness change amounts is greater than or equal to the target value of the brightness of the screen backlight, determining the n+1th frame
  • the screen backlight brightness is the sum of the screen backlight brightness of the nth frame and the brightness change amount; or, if the screen backlight brightness of the nth frame is determined from the screen backlight brightness of the nth frame to the n+1th frame
  • the sum of the brightness change amounts when the brightness of the screen backlight changes is smaller than the target value of the brightness of the screen backlight, and the screen backlight brightness of the (n+1)th frame is determined as the target value of the brightness of the screen backlight.
  • the amount of change in brightness when the brightness of the screen backlight of the nth frame is changed to the brightness of the screen backlight of the (n+1)th frame may be determined in the following manner: according to the brightness of the screen backlight of the nth frame; or, according to The ambient light brightness; or, according to the screen backlight brightness of the nth frame and the ambient light brightness.
  • the brightness of the screen backlight from the nth frame is determined according to the brightness of the screen backlight ⁇ ⁇ of the nth frame.
  • the target value B of the brightness of the screen backlight is greater than the initial value A of the brightness of the screen backlight
  • the photosensitive sensor detects that the brightness of the ambient light is large, the brightness of the screen backlight can be adjusted to the highest speed.
  • D 2 is greater than 0 and less than 1.
  • the light sensor detects that the brightness of the ambient light and the brightness of the screen backlight of the current frame are both small. If the brightness of the screen backlight is automatically changed, the adjustment speed becomes a slow speed to ensure that the human eye does not feel the screen backlight. Blinking of brightness.
  • N / Ci range may be between 0. 01-1
  • M / C 2 range may be between 0. 005-0.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change in the brightness of the screen during the adjustment of the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight is changed more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • the executor of the above embodiment may be a terminal with a screen, such as a mobile phone, a tablet, a portable computer, a desktop computer, a wireless router with a screen, or a modem.
  • the method for adjusting the brightness of the screen backlight implemented in each frame may include:
  • the screen backlight brightness of the nth frame is determined, where n is a positive integer greater than or equal to 1; thus, the initial value of the brightness of the screen backlight is determined to be the detected screen backlight brightness of the first frame.
  • determining the brightness change amount according to the screen backlight brightness of the current frame determining the brightness change amount according to the ambient light brightness; or determining the brightness change amount according to the screen backlight brightness of the current frame and the ambient light brightness.
  • the brightness of the screen backlight from the nth frame is determined according to the brightness of the screen backlight ⁇ ⁇ of the nth frame.
  • the screen backlight brightness ⁇ ⁇ and the ambient light brightness L according to the nth frame are determined to be from the nth frame.
  • the target value of the screen backlight brightness is greater than an initial value
  • determining a screen backlight brightness of the current frame and a screen backlight brightness change from the current frame to a screen backlight brightness of the next frame When the sum of the brightness change amounts is greater than or equal to the target value of the screen backlight brightness, adjusting the screen backlight brightness of the current frame according to the difference between the target value and the screen backlight brightness of the current frame a screen backlight brightness of the next frame; or when the target value of the screen backlight brightness is greater than an initial value, determining a screen backlight brightness of the current frame and a screen backlight brightness from the current frame to the next
  • the brightness of the screen backlight from the current frame is adjusted to the next frame according to the amount of change in the brightness Screen backlight brightness.
  • the target value of the screen backlight brightness is less than an initial value
  • determining a screen backlight brightness of the current frame and a screen backlight brightness change from the current frame to a screen backlight brightness of the next frame When the sum of the brightness change amounts is greater than or equal to the target value of the screen backlight brightness, the screen backlight brightness of the current frame is adjusted to the screen backlight brightness of the next frame according to the brightness change amount; Or when the target value of the screen backlight brightness is less than the initial value, the brightness change amount when determining the screen backlight brightness of the current frame and the screen backlight brightness from the current frame to the screen backlight brightness of the next frame And a smaller than the target value of the brightness of the screen backlight, adjusting the brightness of the screen backlight of the current frame to the next frame according to the difference between the target value and the brightness of the screen backlight of the current frame. Screen backlight brightness.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change of the brightness of the screen during the process of adjusting the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight changes more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • the initial value is the current value of the screen backlight brightness, that is, the screen backlight brightness of the first frame
  • the target value can be determined according to the ambient light brightness, or a value set by the system.
  • the screen backlight brightness needs to be raised from the initial value A to the target value B.
  • the initial value A is assigned to the screen backlight brightness X 1 of the first frame and then the subsequent screen backlight brightness ⁇ ⁇ +1 is iteratively operated:
  • X n+1 Min (X n + N *f ( ⁇ ⁇ ) * f (L) , B);
  • N is a constant value and is a positive number, and n is greater than or equal to 1.
  • the luminance change amount F n when the screen backlight luminance of the nth frame is changed to the screen backlight luminance of the (n+1)th frame is: N *f ( ⁇ ⁇ ) * f ).
  • ⁇ ⁇ represents the screen backlight brightness of the nth frame of the screen
  • L represents the ambient light brightness
  • f (X n ) X n /C
  • C is a fixed value, for example C can take 255, or other values.
  • f OJ L A (D) , where D is a fraction greater than zero and less than 1, for example D can be 1/4 or other value.
  • the screen backlight brightness needs to be reduced from the initial value A to the target value B.
  • the initial value A is assigned to the screen backlight brightness Xi of the first frame, and then the subsequent screen backlight brightness is iterated:
  • ⁇ ⁇ +1 ' Max ( ⁇ ⁇ ' - ⁇ * f ( ⁇ ⁇ ' ) * f (L, ), ⁇ , );
  • is a fixed value and is a positive number, and ⁇ is greater than or equal to 1.
  • the degree of change F n is: _M *f ( ⁇ ⁇ ' ) * f (L';
  • ⁇ ⁇ represents the screen backlight brightness of the nth frame of the screen
  • L represents the ambient light brightness
  • f O ) L, A (D) , where D is a fraction greater than zero and less than 1, for example D can be 1/4 or other value.
  • the amount of change in luminance F n from the screen backlight luminance of the nth frame to the screen backlight luminance of the (n+1)th frame is: N *f ( ⁇ ⁇ ) o
  • ⁇ ⁇ represents the screen backlight brightness of the nth frame of the screen.
  • f (X n ) X n /C
  • C is a fixed value, for example C can take 255, or other values.
  • X n+1 Min ( ⁇ ⁇ ' -M *f ( ⁇ ⁇ ' ) , ⁇ ');
  • is a fixed value and is a positive number, ⁇ is greater than or equal to 1.
  • the amount of change in luminance F n from the screen backlight luminance of the nth frame to the screen backlight luminance of the (n+1)th frame is: _M *f ( ⁇ ⁇ ' ).
  • ⁇ ⁇ represents the screen backlight brightness of the nth frame of the screen.
  • the gradient step of the brightness of the screen backlight is only in accordance with the sensitivity of the human eye, only the brightness factor of the screen backlight of the current frame. Since the gradation step is N *f (Xj or -M *f ( ⁇ ⁇ ' ), since ⁇ ⁇ or ⁇ ⁇ is frame-by-frame, the gradation step is more in line with the sensitivity of the human eye. For another example: Consider only ambient lightness factors:
  • the luminance change amount F n when the screen backlight luminance of the nth frame is changed to the screen backlight luminance of the (n+1)th frame is: N * f (L).
  • L ambient light brightness
  • f OJ L A (D) , where D is a fraction greater than zero and less than 1, for example D can be 1/4 or other value.
  • M is Fixed and positive, n is greater than or equal to 1.
  • the amount of change in luminance F n ' from the screen backlight luminance of the nth frame to the screen backlight luminance of the (n+1)th frame is: _M*f (L, ;).
  • L represents the ambient light level
  • f , ) L, A (D) , where D is a fraction greater than zero and less than 1, for example D can be 1/4 or other value.
  • the gradient step is N * f (L) or -M * f (L, ), since L or L is invariant, the gradient step is fixed.
  • Embodiments for adjusting the brightness of a screen backlight according to an embodiment of the present invention are respectively described below in conjunction with specific embodiments.
  • the adjustable brightness of the screen backlight is 0-255, which is divided into 256 steps.
  • First Embodiment Simultaneously consider the screen backlight brightness and ambient light brightness of the current frame.
  • Scenario 1 At the current indoor lighting environment, the brightness of the screen backlight is 80. If the ambient light level becomes lOOOOlux under the sunlight outside the room, the brightness of the screen backlight will rise to 255. The gradual process (from the initial brightness of 80 to the target brightness of 255) is shown in Figure 3. It takes only 0.2 seconds to complete.
  • the sensitivity of the human eye is different under different ambient light conditions. For example, in the sun, the sensitivity of the human eye is reduced. At this time, it is desirable to brighten the brightness as soon as possible, so the brightness of the screen backlight will reach the desired target brightness in a short period of time without affecting the user's use.
  • Scenario 2 Currently in the sun, the brightness of the screen backlight at this time is 255. If the brightness of the ambient light becomes 4001ux in the indoor lighting environment, the brightness of the screen backlight will drop to 80. The gradual process at this time (from the initial brightness of 255 to the target brightness of 80) is shown in Figure 4 and takes 1.7 seconds to complete.
  • scenario 2 and scenario 1 are reciprocal processes, the ambient light brightness is different in the current environment, so the duration of the gradation is different. At the same time, it matches the characteristics of the human eye and the user experience.
  • Scenario 3 At the current indoor lighting environment, the brightness of the screen backlight is 80. If the light is turned off at this time, the brightness of the ambient light is llux, and the brightness of the screen backlight will drop to 6. The gradual process (from the initial brightness of 80 to the target brightness of 6) is shown in Figure 5 and takes about 90 seconds to complete.
  • Scenario 4 Currently in the indoor lighting environment, the brightness of the screen backlight is 6 at this time. If the brightness of the ambient light becomes 4001ux in the indoor lighting environment, the brightness of the screen backlight will rise to 80. Gradually at this time The change process (from the initial brightness of 6 to the target brightness of 80) as shown in Figure 6, it takes 0.8 seconds to complete. Since the ambient light brightness is considered, although scenario 4 and scenario 3 are reciprocal processes, the duration is different. At the same time, it matches the characteristics of the human eye and the user experience.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change in the brightness of the screen during the adjustment of the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight is changed more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • Second Embodiment Only the screen backlight brightness of the current frame is considered.
  • N 0. 0167 * 200
  • M 0. 0167 * 40
  • Scenario 1 At the current indoor lighting environment, the brightness of the screen backlight is 80. If the brightness of the ambient light is l OOOOlux, the brightness of the screen backlight will rise to 255. The gradual change process (from the initial brightness of 80 to the target brightness of 255) is shown in Figure 7. It takes only 1.5 seconds to complete.
  • Scenario 2 Currently in the sun, the brightness of the screen backlight is 255. If the brightness of the ambient light is 4001ux, the brightness of the screen backlight will drop to 80. The gradual process (from initial brightness 255 to target brightness 80) is shown in Figure 8, which takes 7.5 seconds to complete.
  • Scenario 3 At the current indoor lighting environment, the brightness of the screen backlight is 80. If the light is turned off at this time, the brightness of the ambient light is llux, and the brightness of the screen backlight will drop to 6. The gradual process at this time (from the initial brightness of 80 to the target brightness of 6) is as shown in Fig. 9, which takes about 90 seconds to complete.
  • Scenario 4 Currently in the indoor lighting environment, the brightness of the screen backlight at this time is 6, if the brightness of the ambient light becomes 4001ux in the indoor lighting environment, the brightness of the screen backlight will rise to 80.
  • the gradual change process (from the initial brightness of 6 to the target brightness of 80) is shown in Figure 10 and takes 3.4 seconds to complete.
  • the fall time under the darkroom is guaranteed to be long, and the fall time in other environments will be longer.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change in the brightness of the screen during the adjustment of the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight is changed more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • Scenario 1 At the current indoor lighting environment, the brightness of the screen backlight at this time is 80. If the brightness of the ambient light is 100OOlux under outdoor sunlight, the brightness of the screen backlight will rise to 255. The gradual process at this time (from the initial brightness of 80 to the target brightness of 255) is as shown in Figure 11, which takes only 0.5 seconds to complete. Since only the ambient light brightness is considered, the rising and falling speed of the brightness can be controlled, but the curve is a diagonal line, which is not a curve closer to the characteristics of the human eye.
  • Scenario 2 Currently in the sun, the brightness of the screen backlight is 255. If the brightness of the ambient light is 4001ux, the brightness of the screen backlight will drop to 80. The gradual process (from initial brightness 255 to target brightness 80) is shown in Figure 12 and takes 1 second to complete.
  • Scenario 3 At the current indoor lighting environment, the brightness of the screen backlight is 80. If the light is turned off at this time, the brightness of the ambient light is l lux, and the brightness of the screen backlight will drop to 6. The gradual process (from the initial brightness of 80 to the target brightness of 6) is shown in Figure 13. It takes about 90 seconds to complete.
  • Scenario 4 Currently in the indoor lighting environment, the brightness of the screen backlight is 6 at this time. If the brightness of the ambient light is 4001ux in the indoor lighting environment, the brightness of the screen backlight will rise to 80. The gradual process at this time (from the initial brightness of 6 to the target brightness of 80) is as shown in Fig. 14, which takes 0.4 seconds to complete.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change in the brightness of the screen during the adjustment of the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight is changed more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • the device 150 includes a first determining unit 151 and a first adjusting unit 152. among them:
  • the first determining unit 151 is configured to determine an initial value and a target value of the brightness of the screen backlight.
  • the first adjusting unit 152 is configured to adjust the brightness of the screen backlight of the next frame according to the amount of change in brightness of the screen backlight brightness of the next frame from the brightness of the screen backlight of the current frame until the brightness of the screen backlight is made Adjusting from the initial value to the target value, wherein the amount of change in brightness of the screen backlight brightness of the current frame to the screen backlight brightness of the next frame is related to one or a combination of the following factors: Screen backlight brightness and ambient light brightness of the current frame.
  • the first adjusting unit 152 includes a first determining module 1521 and a second determining module. 1522, as shown in Figure 16. among them:
  • the first determining module 1521 is configured to determine, according to the screen backlight brightness of the current frame and/or the ambient light brightness, a change in brightness when the screen backlight brightness of the current frame changes to the brightness of the screen backlight of the next frame. the amount.
  • the second determining module 1522 is configured to determine a screen backlight brightness of the next frame based on the screen backlight brightness of the current frame and the brightness change amount, until the screen backlight brightness is adjusted from the initial value to the Target value.
  • the second determining module 1522 is configured to: when the target value is greater than the initial value, when determining the screen backlight brightness of the nth frame and the screen backlight brightness from the nth frame to the n+1th frame Determining, by a target value of the brightness of the screen backlight, that the screen backlight brightness of the (n+1)th frame is a target value of the screen backlight brightness, wherein the screen of the nth frame is The backlight brightness is the screen backlight brightness of the current frame, the screen backlight brightness of the n+1th frame is the screen backlight brightness of the next frame; or when the target value is greater than the initial value, when determining the nth Determining the n+th when the sum of the screen backlight brightness of the frame and the brightness change amount when the screen backlight brightness of the nth frame changes to the screen backlight brightness of the n+1th frame is smaller than the target value of the screen backlight brightness
  • the screen backlight brightness of one frame is the sum of the screen backlight brightness of the nth
  • the second determining module 1522 is configured to: when the target value is smaller than the initial value, when determining the screen backlight brightness of the nth frame and the screen backlight brightness from the nth frame to the n+1th frame Determining, by the sum of the amount of change in brightness, the target value of the brightness of the screen backlight, determining that the screen backlight brightness of the (n+1)th frame is the sum of the screen backlight brightness of the nth frame and the brightness change amount.
  • the screen backlight brightness of the nth frame is the screen backlight brightness of the current frame, the screen backlight brightness of the n+1th frame is the screen backlight brightness of the next frame; or when the target value is less than The initial value, when determining that the screen backlight brightness of the nth frame and the brightness of the screen backlight from the nth frame change to the screen backlight brightness of the n+1th frame are smaller than the screen backlight a target value of the brightness, determining a screen backlight brightness of the (n+1)th frame as a target value of the screen backlight brightness, wherein a screen backlight brightness of the nth frame is a screen backlight brightness of the current frame, the The screen backlight brightness of the n+1 frame is the screen backlight brightness of the next frame.
  • the first determining module 1521 is configured to determine the brightness change amount according to the screen backlight brightness of the current frame; or determine the brightness change amount according to the ambient light brightness; or according to the current frame of the screen backlight The brightness and the ambient light brightness determine the amount of change in brightness.
  • the first determining module 1521 is configured to: when the target value B is greater than the initial value A, the determining according to the screen backlight brightness ⁇ ⁇ of the current frame and the ambient light brightness L,
  • N/C1 is between 0. 01-1 and the range of M/C2 is between 0. 005-0.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change of the brightness of the screen during the process of adjusting the brightness of the screen.
  • embodiments of the present invention use different gradual processes for different screen backlight brightness and/or ambient light brightness, which The brightness of the screen backlight is changed more smoothly, which is beneficial to the human eye to smoothly adapt to different brightness and different sensitivity.
  • FIG. 17 is a block diagram showing the structure of a terminal according to an embodiment of the present invention.
  • the terminal 170 includes a detecting device 171, a control device 172, and a driving device 173. among them:
  • the detecting device 171 is configured to determine the brightness of the screen backlight of the current frame
  • the control device 172 is configured to determine, according to the screen backlight brightness and/or the ambient light brightness of the current frame, a brightness change amount when the screen backlight brightness of the current frame changes to a screen backlight brightness of the next frame;
  • the driving device 173 is configured to adjust the screen backlight brightness of the current frame to the screen backlight brightness of the next frame according to the screen backlight brightness of the current frame and the brightness change amount.
  • control device 172 is configured to determine the brightness change amount according to the screen backlight brightness of the current frame; or determine the brightness change amount according to the ambient light brightness; or according to the current frame of the screen backlight The brightness and the ambient light brightness determine the amount of change in brightness.
  • the driving device 173 is configured to: when the target value of the screen backlight brightness is greater than an initial value, determine a screen backlight brightness of the current frame and a screen backlight brightness from the current frame to a screen of the next frame When the sum of the brightness change amounts when the backlight brightness changes is greater than or equal to the target value of the screen backlight brightness, according to the difference between the target value and the screen backlight brightness of the current frame, from the screen of the current frame The brightness of the backlight is adjusted to the brightness of the screen backlight of the next frame; or when the target value of the brightness of the screen backlight is greater than the initial value, determining the brightness of the screen backlight of the current frame and the brightness of the screen backlight from the current frame In the case where the sum of the brightness change amounts when the screen backlight brightness of the next frame is changed is smaller than the target value of the screen backlight brightness, the screen backlight brightness of the current frame is adjusted to the lower according to the brightness change amount. The brightness of the screen backlight of one frame.
  • the driving device 173 is configured to: when the target value of the screen backlight brightness is less than an initial value, determine a screen backlight brightness of the current frame and a screen backlight brightness from the current frame to a screen backlight brightness of the next frame In the case where the sum of the amount of change in luminance at the time of change is greater than or equal to the target value of the brightness of the screen backlight, the brightness of the screen backlight from the current frame is adjusted according to the amount of change in brightness a screen backlight brightness of the next frame; or when the target value of the screen backlight brightness is less than an initial value, determining a screen backlight brightness of the current frame and a screen backlight brightness from the current frame to the next In a case where the sum of the amount of change in luminance when the brightness of the screen backlight of the frame is smaller than the target value of the brightness of the screen backlight, the difference between the target value and the brightness of the screen backlight of the current frame, from the current frame The screen backlight brightness is adjusted to the screen backlight brightness of the next
  • the detecting device 171 can be implemented by various photosensitive sensors, or other devices capable of detecting the intensity of light; the control device 172 can be implemented by a device having computing power, such as a central processing unit CPU.
  • the driving device 173 is realized by a device having a backlight source driving capability, such as a backlight driver or the like.
  • the embodiment of the present invention considers the brightness of the screen backlight and/or the brightness of the ambient light, so that the human eye may not feel the change in the brightness of the screen during the adjustment of the brightness of the screen.
  • the embodiment of the present invention uses different gradual processes for different screen backlight brightness and/or ambient light brightness, so that the brightness of the screen backlight is changed more smoothly, thereby facilitating the smooth adaptation of the human eye to different brightnesses and different sensitivities.
  • the disclosed apparatus and method can In other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the components displayed for the unit may or may not be physical units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, Random Acce ss Memory), a magnetic disk or an optical disk, and the like, which can store program codes. medium.

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Abstract

本发明涉及调整屏幕亮度的方法和装置以及终端。其中,所述调整屏幕亮度的方法包括:确定所述屏幕背光亮度的初始值和目标值;根据从当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量,对所述下一帧的屏幕背光亮度进行调整,直到使所述屏幕背光亮度从所述初始值调整为所述目标值,其中,所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量与以下因素之一或其组合有关:所述当前帧的屏幕背光亮度和环境光亮度。从而,本发明实施例在调整屏幕背光亮度的过程中考虑了屏幕背光亮度和/或环境光亮度,使得屏幕背光亮度的变化更加平滑,这样人眼可能不会感觉到屏幕背光亮度的变化。

Description

调整屏幕背光亮度的方法和装置以及终端 本申请要求于 201 3 年 6 月 17 日提交中国专利局, 申请号为 201 31 0239852. 发明名称为 "调整屏幕背光亮度的方法和装置以及终端" 的中国专利申请, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 特别地, 涉及调整屏幕背光亮度的方法和装置以 及终端。
背景技术
在电子工业中, 背光是一种照明的形式, 常被用于液晶显示屏上。 液晶 显示屏本身是不发光, 需要在液晶显示屏背后设置背光灯源, 于是液晶显示 屏通过屏幕上均勾排列的细小的液晶颗粒通过 "阻断" 和 "打开" 背光灯源 发出的光线来达到还原画面的。 因此, 屏幕背光亮度会直接影响屏幕的亮度。
目前, 移动终端的屏幕背光亮度均可以实现自动调整。 例如, 手机在自 动调整屏幕背光亮度时, 通常釆用渐变的方式, 并且调整的速度是固定的。
例如, 屏幕背光的初始亮度为 C , 目标亮度为 D , 那么每次屏幕刷新时, 屏幕背光亮度就会变化一个单位亮度。 具体而言, 当屏幕背光亮度需要从 C升 至 D时, 屏幕按照一定频率刷新, 每刷新一次, 屏幕背光亮度就递增一个单位 亮度, 直到从初始亮度 C升至目标亮度 D , 屏幕背光亮度的变化才停止; 或者, 当屏幕背光亮度需要从初始亮度 E降至目标亮度 F时, 屏幕按照一定频率刷新, 每刷新一次, 屏幕背光亮度就递减一个单位亮度, 直到从初始亮度 E降至目标 亮度 F , 屏幕背光亮度的变化才停止。 由此可见, 屏幕背光亮度的调整速度是 固定的。
但是, 人眼在不同亮度下的适应性和敏感度是不同的。 例如, 人眼对暗 环境的适应时间较长, 而对亮环境的适应时间较短。 当亮度较暗时, 人眼的 敏感度较高, 比较容易捕捉到亮度的微小变化, 而随着亮度的提升, 人眼的 敏感度随之下降。 那么, 在现有的屏幕亮度渐变的情况下, 某些场景下人眼 可能会感觉到屏幕亮度的变化。 发明内容
本发明实施例提供了调整屏幕背光亮度的方法和装置以及终端, 在调整 屏幕背光亮度的过程中, 人眼可能不会感觉到屏幕背光亮度的变化。
第一方面, 提出了一种调整屏幕背光亮度的方法, 包括: 确定所述屏幕 背光亮度的初始值和目标值; 根据从当前帧的屏幕背光亮度向下一帧的屏幕 背光亮度变化时的亮度变化量, 对所述下一帧的屏幕背光亮度进行调整, 直 到使所述屏幕背光亮度从所述初始值调整为所述目标值, 其中, 所述当前帧 的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量与以下因 素之一或其组合有关: 所述当前帧的屏幕背光亮度和环境光亮度。
结合第一方面, 在第一方面的第一实施方式中, 所述根据从当前帧的屏 幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量, 对所述下一帧的 屏幕背光亮度进行调整, 直到使所述屏幕背光亮度从所述初始值调整为所述 目标值, 包括: 根据所述当前帧的屏幕背光亮度和 /或所述环境光亮度, 确定 从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变 化量; 基于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所述下一 帧的屏幕背光亮度, 直到使所述屏幕背光亮度从所述初始值调整为所述目标 值。
结合第一方面的第一实施方式, 在第一方面的第二实施方式中, 所述基 于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所述下一帧的屏幕 背光亮度, 包括: 当所述目标值大于所述初始值, 当确定第 n 帧的屏幕背光 亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述屏幕背光亮度的目标值, 其中所述第 n 帧的屏幕背光亮 度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一 帧的屏幕背光亮度; 或者当所述目标值大于所述初始值, 当确定第 n 帧的屏 幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化 时的亮度变化量的和小于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所 述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏 幕背光亮度为所述下一帧的屏幕背光亮度。
结合第一方面的第一实施方式, 在第一方面的第三实施方式中, 所述基 于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所述下一帧的屏幕 背光亮度, 包括: 当所述目标值小于所述初始值, 当确定第 n 帧的屏幕背光 亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所 述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏 幕背光亮度为所述下一帧的屏幕背光亮度; 或者当所述目标值小于所述初始 值, 当确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标 值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏幕背光亮度的目标值, 其中 所述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1帧的 屏幕背光亮度为所述下一帧的屏幕背光亮度。
结合第一方面的第一、 第二或第三实施方式, 在第一方面的第四实施方 式中, 所述根据所述当前帧的屏幕背光亮度和 /或所述环境光亮度, 确定从所 述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化 量, 包括: 根据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者根 据所述环境光亮度, 确定所述亮度变化量; 或者根据所述当前帧的屏幕背光 亮度和所述环境光亮度, 确定所述亮度变化量。 结合第一方面的第四实施方式, 在第一方面的第五实施方式中, 当所述 目标值 B大于所述初始值 A , 所述根据所述当前帧的所述屏幕背光亮度 Χπ, 确 定所述亮度变化量 Fn为: Fn=N * (Xn/d); 当所述目标值 B' 小于所述初始值 A' , 所述根据所述当前帧的所述屏幕背光亮度 Χπ' , 确定所述亮度变化量 Fn, 为: Fn' =_Μ * (Χη' /C2) ; 其中, N和 M均为正数, 和 均为正整数。
结合第一方面的第四实施方式, 在第一方面的第六实施方式中, 当所述 目标值 B大于所述初始值 A , 所述根据所述环境光亮度 L , 确定所述亮度变化 量 Fn为: Fn=N * (I DJ ; 当所述目标值 B' 小于所述初始值 Α' , 所述才艮据所 述环境光亮度 L' , 确定所述亮度变化量 Fn, 为: Fn' =-M * (L' AD2) ; 其中, N和 M均为正数, D^。D2均大于 0且小于 1。
结合第一方面的第四实施方式, 在第一方面的第七实施方式中, 当所述 目标值 B大于所述初始值 A ,所述根据所述当前帧的所述屏幕背光亮度 Χπ和所 述环境光亮度 L , 确定所述亮度变化量 Fn为: Fn=N * (Xn/d) * (I DJ ; 当所 述目标值 B, 小于所述初始值 A,, 所述根据所述当前帧的所述屏幕背光亮度 Χ„' 和所述环境光亮度 L' , 确定当前帧的亮度变化量 Fn, 为: Fn' =-M * (Χη' /C2) * , AD2) ; 其中, N和 M均为正数, 和 均为正整数, D^。D2均大于 0且小于 1。
结合第一方面的第五或第七实施方式, 在第一方面的第八实施方式中, N/C 々范围在 0. 01-1之间, M/C2的范围在 0. 005-0. 1之间。
第二方面, 提出了一种调整屏幕背光亮度的方法, 包括: 确定当前帧的 屏幕背光亮度; 根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从所 述当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量; 根 据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光 亮度调整为所述下一帧的屏幕背光亮度。
结合第二方面, 在第二方面的第一实施方式中, 所述根据所述当前帧的 屏幕背光亮度和 /或环境光亮度, 确定从所述当前帧的屏幕背光亮度向下一帧 的屏幕背光亮度变化时的亮度变化量, 包括: 根据所述当前帧的屏幕背光亮 度, 确定所述亮度变化量; 或者根据所述环境光亮度, 确定所述亮度变化量; 或者根据所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化 量。
结合第二方面或其第一实施方式, 在第二方面的第二实施方式中, 根据 所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光亮 度调整为所述下一帧的屏幕背光亮度, 包括: 当所述屏幕背光亮度的目标值 大于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光 亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量的和大于或等于所述 屏幕背光亮度的目标值的情况下, 按照所述目标值与所述当前帧的屏幕背光 亮度的差值, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮 度; 或者当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏 幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变 化时的亮度变化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述 亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮 度。
结合第二方面的第一或第二实施方式, 在第二方面的第三实施方式中, 所述根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏 幕背光亮度调整为所述下一帧的屏幕背光亮度, 包括: 当所述屏幕背光亮度 的目标值小于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当前帧的 屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量的和大于或 等于所述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当 前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或者当所述屏幕背 光亮度的目标值小于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当 前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量的和 小于所述屏幕背光亮度的目标值的情况下, 按照所述目标值与所述当前帧的 屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏 幕背光亮度。
第三方面, 提出了一种调整屏幕背光亮度的装置, 包括: 第一确定单元, 用于确定所述屏幕背光亮度的初始值和目标值; 第一调整单元, 用于根据从 当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量, 对所 述下一帧的屏幕背光亮度进行调整, 直到使所述屏幕背光亮度从所述初始值 调整为所述目标值, 其中, 所述当前帧的屏幕背光亮度向所述下一帧的屏幕 背光亮度变化时的亮度变化量与以下因素之一或其组合有关: 所述当前帧的 屏幕背光亮度和环境光亮度。
结合第三方面, 在第三方面的第一实施方式中, 所述第一调整单元包括: 第一确定模块, 用于根据所述当前帧的屏幕背光亮度和 /或所述环境光亮度, 确定从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量; 第二确定模块, 用于基于所述当前帧的屏幕背光亮度以及所述亮 度变化量, 确定所述下一帧的屏幕背光亮度, 直到使所述屏幕背光亮度从所 述初始值调整为所述目标值。
结合第三方面的第一实施方式, 在第三方面的第二实施方式中, 所述第 二确定模块用于: 当所述目标值大于所述初始值, 当确定第 n 帧的屏幕背光 亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述屏幕背光亮度的目标值, 其中所述第 n 帧的屏幕背光亮 度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一 帧的屏幕背光亮度; 或者当所述目标值大于所述初始值, 当确定第 n 帧的屏 幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化 时的亮度变化量的和小于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所 述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏 幕背光亮度为所述下一帧的屏幕背光亮度。
结合第三方面的第一实施方式, 在第三方面的第三实施方式中, 所述第 二确定模块用于: 当所述目标值小于所述初始值, 当确定第 n 帧的屏幕背光 亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的 屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所 述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏 幕背光亮度为所述下一帧的屏幕背光亮度; 或者当所述目标值小于所述初始 值, 当确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标 值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏幕背光亮度的目标值, 其中 所述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1帧的 屏幕背光亮度为所述下一帧的屏幕背光亮度。
结合第三方面的第一、 第二或第三实施方式, 在第三方面的第四实施方 式中, 所述第一确定模块用于: 根据所述当前帧的屏幕背光亮度, 确定所述 亮度变化量; 或者根据所述环境光亮度, 确定所述亮度变化量; 或者根据所 述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
结合第三方面的第四实施方式, 在第三方面的第五实施方式中, 第一确 定模块具体用于: 当所述目标值 B大于所述初始值 A, 所述根据所述当前帧的 所述屏幕背光亮度 Χπ, 确定所述亮度变化量 Fn为: Fn=N * (Xn/d) ; 当所述目 标值 B, 小于所述初始值 Α,, 所述根据所述当前帧的所述屏幕背光亮度 Χπ,, 确定所述亮度变化量 Fn, 为: Fn, =-Μ * (Χη' /C2) ; 其中, N和 M均为正数, C o C2均为正整数。
结合第三方面的第四实施方式, 在第三方面的第六实施方式中, 第一确 定模块具体用于: 当所述目标值 B大于所述初始值 A, 所述根据所述环境光亮 度 L, 确定所述亮度变化量 Fn为: Fn=N * (I DJ ; 当所述目标值 B' 小于所述 初始值 Α' , 所述根据所述环境光亮度 L' , 确定所述亮度变化量 Fn' 为: Fn' =-M * (L, AD2); 其中, N和 M均为正数, D^。D2均大于 0且小于 1。
结合第三方面的第四实施方式, 在第三方面的第七实施方式中, 第一确 定模块具体用于: 当所述目标值 B大于所述初始值 A , 所述根据所述当前帧的 所述屏幕背光亮度 Χπ和所述环境光亮度 L , 确定所述亮度变化量 Fn为: Fn=N * (Xn/d) * O DJ ; 当所述目标值 B' 小于所述初始值 A' , 所述根据所述当前 帧的所述屏幕背光亮度 Χπ, 和所述环境光亮度 L' , 确定当前帧的亮度变化量 Fn' 为: Fn, =_Μ * (Χη' /C2) * (L, AD2) ; 其中, N和 M均为正数, 和(2均 为正整数, D^。D2均大于 0且小于 1。
结合第三方面的第五或第七实施方式, 在第三方面的第八实施方式中, N/C 々范围在 0. 01-1之间, M/C2的范围在 0. 005-0. 1之间。
第四方面, 提出了一种终端, 包括: 检测设备, 用于确定当前帧的屏幕 背光亮度;控制设备,用于根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从所述当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变 化量; 驱动设备, 用于根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
结合第四方面, 在第四方面的第一实施方式中, 所述控制设备用于: 根 据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者根据所述环境光 亮度, 确定所述亮度变化量; 或者根据所述当前帧的屏幕背光亮度和所述环 境光亮度, 确定所述亮度变化量。
结合第四方面或其第一实施方式, 在第四方面的第二实施方式中, 所述 驱动设备用于: 当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前 帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光 亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值的情况 下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从所述当前帧的 屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或者当所述屏幕背光亮度 的目标值大于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当前帧的 屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量的和小于所 述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当前帧的 屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
结合第四方面或其第一实施方式, 在第四方面的第三实施方式中, 所述 驱动设备用于: 当所述屏幕背光亮度的目标值小于初始值, 在确定所述当前 帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光 亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值的情况 下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧 的屏幕背光亮度; 或者当所述屏幕背光亮度的目标值小于初始值, 在确定所 述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏 幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标值的情况 下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从所述当前帧的 屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
本发明实施例在调整屏幕背光亮度的过程中考虑了屏幕背光亮度和 /或 环境光亮度, 使得屏幕背光亮度的变化更加平滑, 这样人眼可能不会感觉到 屏幕背光亮度的变化。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例中 所需要使用的附图作简单地介绍, 显而易见地, 下面所描述的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的 前提下, 还可以根据这些附图获得其他的附图。
图 1是根据本发明一个实施例的调整屏幕亮度的方法的流程图。
图 2是根据本发明另一实施例的调整屏幕亮度的方法的流程图。
图 3是根据本发明第一实施方式的场景一的效果图。 图 4是根据本发明第一实施方式的场景二的效果图。
图 5是根据本发明第一实施方式的场景三的效果图。
图 6是根据本发明第一实施方式的场景四的效果图。
图 7是根据本发明第二实施方式的场景一的效果图。
图 8是根据本发明第二实施方式的场景二的效果图。
图 9是根据本发明第二实施方式的场景三的效果图。
图 10是根据本发明第二实施方式的场景四的效果图。
图 11是根据本发明第三实施方式的场景一的效果图。
图 12是根据本发明第三实施方式的场景二的效果图。
图 1 3是根据本发明第三实施方式的场景三的效果图。
图 14是根据本发明第三实施方式的场景四的效果图。
图 15是根据本发明一个实施例的调整屏幕亮度的装置的结构示意图。 图 16是根据本发明一个实施例的调整屏幕亮度的装置中第一调整单元的 结构示意图。
图 17是根据本发明一个实施例的终端的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创 造性劳动的前提下所获得的所有其他实施例, 都应属于本发明保护的范围。
为了解决现有技术中屏幕背光亮度的调整速度是固定的, 人眼在不同的 亮度下的敏感度不同, 在某些场景下, 人眼可能会感觉到屏幕背光亮度的变 化的问题。 本发明实施例基于屏幕背光的亮度以及环境光的亮度、 屏幕背光 的亮度或环境光的亮度, 来调整屏幕背光亮度的渐变过程, 这样人眼可能不 会感觉到屏幕背光亮度的变化。
图 1 示出了根据本发明一个实施例的一种调整屏幕背光亮度的方法。 如 图 1所示, 该方法包括:
11 , 确定屏幕背光亮度的初始值和目标值。
例如, 可以通过感光传感器 (l ight sensor ) 的检测环境光的亮度, 从 而确定所述屏幕背光亮度的初始值, 例如可以根据环境光的亮度与屏幕背光 亮度的对应关系, 得到环境光的亮度对应的屏幕背光亮度; 或者, 还可以根 据环境光亮度, 确定所述屏幕背光亮度的目标值。 其中, 环境光的亮度与屏 幕背光亮度的对应关系可以由不同的算法确定, 或也可以通过查表确定。 其 中, 这里的算法可以参考 CIE1976 标准中的算法, 当然也可以釆用现有技术 中的其他算法, 本发明实施例对此并不限定。
对于不同的带有屏幕的设备, 其屏幕背光亮度的可调范围是不同的。 例 如, 有的屏幕背光亮度的可调范围为 0-255 , 共 256阶; 或者, 有的屏幕背光 亮度的可调范围为 0-127 , 共 128阶。
以下实施例均以 256 阶的屏幕背光亮度的可调范围为例。 其中, 如果到 室外阳光下, 环境光亮度为 l OOOOlux, 对应的屏幕背光亮度为 255。 环境光 亮度为 4001ux, 对应的屏幕背光亮度为 80。 环境光亮度为 l lux , 对应的屏幕 背光亮度为 6。 这里, 勒克司是亮度单位, 即距离一个光强为 1坎德拉(cd ) 的光源在 1米处所能接受的照明强度。
此外, 在确定屏幕背光亮度的初始值和目标值之前, 该方法还可以包括: 检测所述环境光亮度。
12 , 根据从当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮 度变化量, 对下一帧的屏幕背光亮度进行调整, 直到使所述屏幕背光亮度从 所述初始值调整为所述目标值, 其中当前帧的屏幕背光亮度向下一帧的屏幕 背光亮度变化时的亮度变化量与以下因素之一或其组合有关: 当前帧的屏幕 背光亮度和环境光亮度。 在本发明各实施例中,帧是指液晶显示器(LCD, Liquid Crys ta l Di splay ) 刷新频率的导数。例如, 帧可以由 n表示, n为大于或等于 1的正整数。 于是, 当 LCD每刷新一次, n增加 1。
其中, 当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变 化量与以下因素之一或其组合有关: 当前帧的屏幕背光亮度和环境光亮度, 是指: 亮度变化量与当前帧的屏幕背光亮度有关、 亮度变化量与环境光亮度 有关、 或亮度变化量与当前帧的屏幕背光亮度和环境光亮度均有关。
具体而言,首先,根据所述当前帧的屏幕背光亮度和 /或所述环境光亮度, 确定从当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变 化量; 然后, 基于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所 述下一帧的屏幕背光亮度, 直到使所述屏幕背光亮度从所述初始值调整为所 述目标值。 也就是, 在当前帧的屏幕背光亮度的基础上, 确定下一帧的屏幕 背光亮度, 从而逐帧地调整屏幕背光亮度。
为了方便描述, 以下利用所述第 n 帧的屏幕背光亮度表述所述当前帧的 屏幕背光亮度, 以所述第 n+1 帧的屏幕背光亮度表述所述下一帧的屏幕背光 亮度。
例如, 当目标值 B大于初始值 A时, 如果确定第 n帧的屏幕背光亮度与 从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度变化 量的和大于或等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的屏幕背 光亮度为所述屏幕背光亮度的目标值; 或者如果确定第 n 帧的屏幕背光亮度 与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度变 化量的和小于所述屏幕背光亮度的目标值, 确定第 n+1 帧的屏幕背光亮度为 所述第 n帧的屏幕背光亮度与所述亮度变化量的和。
可选地, 例如, 当目标值 B, 小于初始值 A, 时, 如果确定第 n帧的屏幕 背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时 的亮度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定第 n+1 帧的 屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和; 或者, 如果确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧 的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标值, 确定所述第 n+1帧的屏幕背光亮度为所述屏幕背光亮度的目标值。
此外,可以通过以下方式确定从所述第 n帧的屏幕背光亮度向所述第 n+1 帧的屏幕背光亮度变化时的亮度变化量: 根据所述第 n 帧的屏幕背光亮度; 或者, 根据所述环境光亮度; 或者, 根据所述第 n 帧的屏幕背光亮度和所述 环境光亮度。
当所述屏幕背光亮度的目标值 B大于所述屏幕背光亮度的初始值 A,所述 根据所述第 n帧的屏幕背光亮度 Χπ, 确定从所述第 η帧的屏幕背光亮度向所 述第 n+1帧的屏幕背光亮度变化时的亮度变化量 Fn为: Fn=N * (Xn/d); 所述 屏幕背光亮度的目标值 B, 小于所述屏幕背光亮度的初始值 Α,, 所述根据所 述第 n帧的屏幕背光亮度 Χπ,,确定从所述第 η帧的屏幕背光亮度向所述第 n+1 帧的屏幕背光亮度变化时的亮度变化量 Fn, 为: Fn' =-Μ * (Χη' /C2) ; 其中, N和 M均为正数, 和 均为正整数。
或者,当所述屏幕背光亮度的目标值 B大于所述屏幕背光亮度的初始值 A, 所述根据所述环境光亮度 L, 确定从所述第 n帧的屏幕背光亮度向所述第 n+1 帧的屏幕背光亮度变化时的亮度变化量 Fn为: Fn=N * 0 DJ ; 所述屏幕背光 亮度的目标值 B, 小于所述屏幕背光亮度的初始值 Α,, 所述根据所述环境光 亮度 L,, 确定从所述第 n帧的屏幕背光亮度向所述第 n+1帧的屏幕背光亮度 变化时的亮度变化量 Fn,: Fn' =-M * (L, AD2) ; 其中, N和 M 均为正数, 和 D2均大于 0且小于 1。 比如, 当感光传感器检测到环境光的亮度很大时, 可 以将屏幕背光亮度的变化速度调到最高。
或者,当所述屏幕背光亮度的目标值 B大于所述屏幕背光亮度的初始值 A, 所述根据所述第 n帧的屏幕背光亮度 Χπ和所述环境光亮度 L,确定从所述第 η 帧的屏幕背光亮度向所述第 n+1帧的屏幕背光亮度变化时的亮度变化量 Fn为: Fn=N * (Xn/d) * O DJ ; 所述屏幕背光亮度的目标值 B, 小于所述屏幕背光 亮度的初始值 A,, 所述根据所述第 n帧的屏幕背光亮度 Χπ, 和所述环境光亮 度 L,, 确定从所述第 n帧的屏幕背光亮度向所述第 n+1帧的屏幕背光亮度变 化时的亮度变化量 Fn, 为: Fn' =-Μ * (Χη' /C2) * (L' AD2) ; 其中, N和 M均 为正数, 和 均为正整数, D^。D2均大于 0且小于 1。 比如, 感光传感器检 测到环境光的亮度和当前帧的屏幕背光亮度都很小时, 此时如果需要自动更 改屏幕背光亮度, 则调整速度变成很慢的速度, 以确保人眼感觉不到屏幕背 光亮度的闪烁。
以上, N/Ci的范围可以在 0. 01-1之间, M/C2的范围可以在 0. 005-0. 1之 间。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
以上结合图 1 描述了调整屏幕亮度的流程, 上面实施例的执行主体可以 为带屏幕的终端, 例如手机、 平板电脑、 便携机、 台式电脑、 带有屏幕的无 线路由器或调制解调器 ( modem )。
下面, 将结合图 2说明终端如何调整屏幕背光亮度。 其中, 在各个帧中 实现的调整屏幕背光亮度的方法可以包括:
21 , 确定当前帧的屏幕背光亮度。
例如, 确定第 n帧的屏幕背光亮度, 其中 n为大于或等于 1的正整数; 于是, 确定所述屏幕背光亮度的初始值为检测到的第一帧的屏幕背光亮度。
22 , 根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从所述当前 帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量。
具体而言, 根据所述当前帧的所述屏幕背光亮度, 确定所述亮度变化量; 或者根据所述环境光亮度, 确定所述亮度变化量; 或者根据所述当前帧的所 述屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
例如, 根据第 n帧的屏幕背光亮度, 确定从所述第 n帧的屏幕背光亮度 向第 n+1 帧的屏幕背光亮度变化时的亮度变化量; 或者, 根据环境光亮度, 确定从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度 变化量; 或者, 根据第 n 帧的屏幕背光亮度和环境光亮度, 确定从所述第 n 帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度变化量。
具体地, 当所述屏幕背光亮度的目标值 B 大于所述屏幕背光亮度的初始 值 A, 所述根据所述第 n帧的屏幕背光亮度 Χπ, 确定从第 η帧的屏幕背光亮度 向第 n+1帧的屏幕背光亮度变化时的亮度变化量 Fn为: Fn=N * (Xn/d) ; 当所 述屏幕背光亮度的目标值 B, 小于所述屏幕背光亮度的初始值 Α,, 所述根据 所述第 n帧的屏幕背光亮度 Χπ,, 确定从第 η帧的屏幕背光亮度向第 n+1帧的 屏幕背光亮度变化时的亮度变化量 Fn, 为: Fn' =-Μ * (Χη' /C2) ; 其中, N和 M均为正数, 和 均为正整数。
或者,当所述屏幕背光亮度的目标值 B大于所述屏幕背光亮度的初始值 A, 所述根据所述环境光亮度 L ,确定从第 n帧的屏幕背光亮度向第 n+1帧的屏幕 背光亮度变化时的亮度变化量 Fn为: Fn=N * (I DJ ; 当所述屏幕背光亮度的 目标值 B, 小于所述屏幕背光亮度的初始值 Α,, 所述根据所述环境光亮度 L, , 确定从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度变化 量 Fn,: Fn' =-M * , AD2) ; 其中, N和 M均为正数, D^。D2均大于 0且小于 1。
或者,当所述屏幕背光亮度的目标值 B大于所述屏幕背光亮度的初始值 A, 所述根据所述第 n帧的屏幕背光亮度 Χπ和所述环境光亮度 L ,确定从第 η帧的 屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量 Fn为: Fn=N * (Xn/Cj * O DJ ; 当所述屏幕背光亮度的目标值 B, 小于所述屏幕背光亮度 的初始值 Α,,所述根据所述第 n帧的屏幕背光亮度 Χπ,和所述环境光亮度 L, , 确定从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮度变化 量 Fn, 为: Fn, =-Μ * (Χη' /C2) * (L, AD2) ; 其中, N和 M均为正数, d ^ C2 均为正整数, D^。D2均大于 0且小于 1。
23 , 根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧 的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
可选地, 例如, 当所述屏幕背光亮度的目标值大于初始值, 在确定所述 当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕 背光亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值的 情况下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从所述当前 帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或者当所述屏幕背光 亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当前 帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量的和小 于所述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当前 帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
可选地, 例如, 当所述屏幕背光亮度的目标值小于初始值, 在确定所述 当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕 背光亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值的 情况下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下 一帧的屏幕背光亮度; 或者当所述屏幕背光亮度的目标值小于初始值, 在确 定所述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一帧 的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标值的 情况下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从所述当前 帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
此外, 在根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从所述 当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量之前, 还可以检测所述环境光亮度。 由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
下面结合本发明的一个具体实施例, 说明根据本发明实施例的调整屏幕 亮度的方法。
容易理解, 初始值是开始调整屏幕背光亮度的当前值, 即第一帧的屏幕 背光亮度, 而目标值可以根据环境光亮度确定, 也可以是系统设置的一个值。
在第一种情况中, 屏幕背光亮度需要由初始值 A升到目标值 B。
首先将初始值 A赋值给第一帧的屏幕背光亮度 X1 然后对后续的屏幕背 光亮度 Χπ+1进行迭代运算:
Xn+1 = Min (Xn+N *f (χη) * f (L) , B); 这里, N为定值且为正数, n大于 等于 1。
这里, 从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn为: N *f (χη) * f )。
以上, Χπ代表屏幕的第 η帧的屏幕背光亮度; L代表环境光亮度。
其中, f (Xn) = Xn/C , 其中 C是固定值, 例如 C可以取 255 , 或其他值。 其中, f OJ = LA (D) , 其中 D是一个大于零且小于 1的分数, 例如 D可 以为 1 /4或其他值。
在第二种情况中, 屏幕背光亮度需要由初始值 A, 降到目标值 B,。
首先将初始值 A, 赋值给第一帧的屏幕背光亮度 Xi,, 然后对后续的屏幕 背光亮度 , 进行迭代运算:
Χη+1' = Max (Χη' - Μ * f (Χη' ) * f (L, ), Β, ); 这里, Μ为定值且为正 数, η大于等于 1。
这里, 从第 η帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn, 为: _M *f (χη' ) * f (L' ;)。
以上, Χπ, 代表屏幕的第 η帧的屏幕背光亮度; L, 代表环境光亮度。 其中, f (Xn, ) = Χη' /C , 其中 C是固定值, 例如 C可以取 255 , 或其他 值。
其中, f O ) = L, A (D) , 其中 D是一个大于零且小于 1的分数, 例如 D 可以为 1/4或其他值。
对于以上列举的两种情况, 均考虑了当前亮度和环境光亮度的因素。 本 领域技术人员可以理解, 对于不同的应用场景, 可以只考虑其中的一个因素。
例如, 只考虑当前亮度因素:
当屏幕背光亮度由初始值 A升到目标值 B,屏幕背光亮度的调整参照 Χπ+1 = Min (Xn+N *f (χη) , B) ; 这里, N为定值且为正数, n大于等于 1。
这里, 从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn为: N *f (χη) o
以上, Χπ代表屏幕的第 n帧的屏幕背光亮度。
其中, f (Xn) = Xn/C, 其中 C是固定值, 例如 C可以取 255 , 或其他值。 当屏幕背光亮度需要由初始值 A, 降到目标值 B,, 屏幕背光亮度的调整 参照 Xn+1, = Min (Χη' -M *f (χη' ) , Β' ); 这里, Μ为定值且为正数, η大 于等于 1。
这里, 从第 η帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn, 为: _M *f (χη' )。
以上, Χπ, 代表屏幕的第 η帧的屏幕背光亮度。
其中, f (Xn, ) = Χη' /C , 其中 C是固定值, 例如 C可以取 255 , 或其他 值。
可以理解, 只有当前帧的屏幕背光亮度因素的话, 屏幕背光亮度的渐变 步调是符合人眼敏感性变化的。 因为渐变步调为 N *f (Xj或 -M *f (χη' ) , 由 于 Χπ或 Χπ, 是逐帧变化的, 因此使得渐变步调更符合人眼敏感性的变化。 再例如: 只考虑环境光亮度因素:
当屏幕背光亮度需要由初始值 A升到目标值 B,屏幕背光亮度的调整参照 Xn+1 = Min (Xn+N *f (L) , B) ; 这里, N为定值且为正数, n大于等于 1。
这里, 从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn为: N * f (L)。
以上, L代表环境光亮度。
其中, f OJ = LA (D) , 其中 D是一个大于零且小于 1的分数, 例如 D可 以为 1 /4或其他值。
当屏幕背光亮度需要由初始值 A, 降到目标值 B,, 屏幕背光亮度的调整 参照 Xn+1, = Min (Χη' _M *f (L, ), B, ); 这里, M为定值且为正数, n大于 等于 1。
这里, 从第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮度变化时的亮 度变化量 Fn' 为: _M * f (L, ;)。
以上, L, 代表环境光亮度。
其中, f , ) = L, A (D) , 其中 D是一个大于零且小于 1的分数, 例如 D 可以为 1 /4或其他值。
可以理解, 只有环境光因素的话, 整体速度是随环境光变化而变化, 但 是亮度渐变的步调是固定的。 因为渐变步调为 N * f (L)或 -M * f (L, ) , 由于 L或 L, 是不变的, 因此使得渐变步调是固定不变的。
以下结合具体实施例分别描述根据本发明实施例的调整屏幕背光亮度的 实施方式。 在以下具体实施例中, 4叚设屏幕背光亮度的可调范围为 0-255 , 共 分 256阶。
第一实施方式: 同时考虑当前帧的屏幕背光亮度和环境光亮度。
设 N=0. 0167* 200 , M=0. 0167 *40 , 其中, 0. 0167为在 60赫兹( HZ )频率 下每帧的时间。 可以理解, 当屏幕的频率变化时, 每帧的时间也随之变化; 而 200和 40是经验系数, 随着频率等参数的变化, 可以是 10-1000中的某个 数, 由此可以得出迭代公式为:
对于亮度提高的过程:
Figure imgf000022_0001
(Xn+0.0167 * 200 * Xn/255 * 1/(1/4) , B) , 每帧算一次, 当 ΧΠ+1=Β时停止。
对于亮度降低的过程: X„+i' =Max (Χη' -0.0167 * 40 * Χη' /255 * L, Λ (1/4) , Β' ) , 每帧算一次, 当 Χπ+1, =Β' 时停止。
情景一: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80, 如果到室 外阳光下, 环境光亮度变为 lOOOOlux, 屏幕背光亮度会上升至 255。 此时的 渐变过程(从初始亮度 80升至目标亮度 255 )如图 3所示, 只需要 0.2秒就 可以完成。
在不同的环境光下, 人眼的敏感性是不同的。 例如, 在阳光下, 人眼敏 感度下降, 此时希望亮度尽快变亮, 所以屏幕背光亮度会在很短的时间内达 到需要的目标亮度, 不影响用户使用。
情景二: 当前在阳光下, 此时的屏幕背光亮度为 255, 如果到室内开灯环 境下, 环境光的亮度变为 4001ux, 屏幕背光亮度会下降成 80。 此时的渐变过 程(从初始亮度 255降至目标亮度 80)如图 4所示, 需要 1.7秒就可以完成。
由于考虑了环境光亮度的因素, 所以虽然情景二和情景一是互逆的过程, 但是由于当前环境的环境光亮度不同, 所以在渐变的持续时间上是不同的。 同时与人眼特性及用户体验相匹配。
情景三: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80, 如果此时 关闭灯光, 环境光的亮度为 llux, 屏幕背光亮度会下降为 6。 此时的渐变过程 (从初始亮度 80降至目标亮度 6 )如图 5所示, 需要 90秒左右才完成。
一般而言, 关灯之后, 人眼需要 10分钟以上时间才能完全适应暗环境。 所以屏幕背光亮度的渐变过程也是需要持续较长的时间。 一方面与人眼的适 应过程匹配, 另一方面以人眼不能察觉的速度下降, 可以实现平滑过渡。
情景四: 当前在室内关灯环境, 此时的屏幕背光亮度为 6, 如果到室内开 灯环境下, 环境光的亮度变为 4001ux, 屏幕背光亮度会上升为 80。 此时的渐 变过程(从初始亮度 6升至目标亮度 80 )如图 6所示, 需要 0. 8秒就可以完成。 由于考虑了环境光亮度, 所以虽然情景四和情景三是互逆的过程, 但是 持续时间上是不同的。 同时与人眼特性及用户体验相匹配。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
第二实施方式: 只考虑当前帧的屏幕背光亮度。
设 N=0. 0167*200 , M=0. 0167*40可以得出迭代公式为:
对于亮度提高的过程: Xn+1=Min (Xn+0. 0167 * 200 * Xn/255 , B) , 每帧算 一次, 当 ΧΠ+1=Β时停止。
对于亮度降低的过程: X„+i' =Max (Χη' -0. 0167 * 40 * Χη' /255 , Β, ) , 每帧算一次, 当 Χπ+1, =Β' 时停止。
情景一: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80 , 如果到室 外阳光下, 环境光的亮度为 l OOOOlux , 屏幕背光亮度会上升为 255。 此时的渐 变过程(从初始亮度 80升至目标亮度 255 )如图 7所示, 只需要 1. 5秒就可以完 成。
只考虑当前帧的屏幕背光亮度可以使屏幕背光亮度的变化曲线更符合人 眼的适应特性, 但是由于没有环境光亮度来提升变化速度, 因此在阳光下上 升的速度较慢。
情景二: 当前在阳光下, 此时的屏幕背光亮度为 255 , 如果到室内开灯环 境下, 环境光的亮度为 4001ux , 屏幕背光亮度会下降为 80。 此时的渐变过程 (从初始亮度 255降至目标亮度 80 )如图 8所示, 需要 7. 5秒就可以完成。
由于没有考虑环境光亮度, 因此保证暗室下的下降时间比较长, 同样在 其他环境下的下降时间也会比较长。 情景三: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80, 如果此时 关闭灯光, 环境光的亮度为 llux, 屏幕背光亮度会下降为 6。 此时的渐变过程 (从初始亮度 80降至目标亮度 6 )如图 9所示, 需要 90秒左右才完成。
一般而言, 关灯之后, 人眼需要 10分钟以上时间才能完全适应暗环境。 所以屏幕背光亮度的渐变过程也是需要持续较长的时间。 一方面与人眼的适 应过程匹配, 另一方面以人眼不能察觉的速度下降, 可以实现平滑过渡。
情景四: 当前在室内关灯环境, 此时的屏幕背光亮度为 6, 如果到室内开 灯环境下, 环境光的亮度变为 4001ux, 屏幕背光亮度会上升为 80。 此时的渐 变过程(从初始亮度 6升至目标亮度 80)如图 10所示, 需要 3.4秒就可以完成。
由于没有考虑环境光亮度, 因此保证暗室下的下降时间比较长, 其他环 境下的下降时间也会比较长。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
第三实施方式: 只考虑环境光亮度。
设 N=0.0167*40, M=0.0167*10可以得出迭代公式为:
对于亮度提高的过程: Xn+1=Min(Xn+0.0167 * 200 * 1/(1/4) , B) , 每帧 算一次, 当 +1=8时停止。
对于亮度降低的过程: X„+i' =Max (Χη' -0.0167 * 40 *V Λ (1/4) , Β' ) , 每帧算一次, 当 Χπ+1, =Β' 时停止。
情景一: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80, 如果到室 外阳光下, 环境光的亮度为 lOOOOlux, 屏幕背光亮度会上升为 255。 此时的渐 变过程(从初始亮度 80升至目标亮度 255 )如图 11所示, 只需要 0.5秒就可以 完成。 由于只考虑环境光亮度, 可以控制亮度的上升下降速度, 但是曲线是斜 线, 不是与人眼特性更接近的曲线。
情景二: 当前在阳光下, 此时的屏幕背光亮度为 255 , 如果到室内开灯环 境下, 环境光的亮度为 4001ux , 屏幕背光亮度会下降为 80。 此时的渐变过程 (从初始亮度 255降至目标亮度 80 )如图 12所示, 需要 1秒就可以完成。
情景三: 当前在室内开灯环境下, 此时的屏幕背光亮度为 80 , 如果此时 关闭灯光, 环境光的亮度为 l lux , 屏幕背光亮度会下降为 6。 此时的渐变过程 (从初始亮度 80降至目标亮度 6 )如图 1 3所示, 需要 90秒左右才完成。
情景四: 当前在室内关灯环境, 此时的屏幕背光亮度为 6 , 如果到室内开 灯环境下, 环境光的亮度为 4001ux , 屏幕背光亮度会上升为 80。 此时的渐变 过程(从初始亮度 6升至目标亮度 80 )如图 14所示, 需要 0. 4秒就可以完成。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
图 15和图 16示出了根据本发明实施例的调整屏幕亮度的装置的结构示 意图。 如图 15所示, 装置 150包括第一确定单元 151和第一调整单元 152。 其中:
第一确定单元 151用于确定所述屏幕背光亮度的初始值和目标值。
第一调整单元 152 用于根据从当前帧的屏幕背光亮度向下一帧的屏幕背 光亮度变化时的亮度变化量, 对所述下一帧的屏幕背光亮度进行调整, 直到 使所述屏幕背光亮度从所述初始值调整为所述目标值, 其中, 所述当前帧的 屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量与以下因素 之一或其组合有关: 所述当前帧的屏幕背光亮度和环境光亮度。
进一步地, 第一调整单元 152 包括第一确定模块 1521 和第二确定模块 1522 , 如图 16所示。 其中:
第一确定模块 1521 用于根据所述当前帧的屏幕背光亮度和 /或所述环境 光亮度, 确定从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变 化时的亮度变化量。
第二确定模块 1522用于基于所述当前帧的屏幕背光亮度以及所述亮度变 化量, 确定所述下一帧的屏幕背光亮度, 直到使所述屏幕背光亮度从所述初 始值调整为所述目标值。
或者, 第二确定模块 1522用于当所述目标值大于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮 度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所 述第 n+1帧的屏幕背光亮度为所述屏幕背光亮度的目标值, 其中所述第 n帧 的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮 度为所述下一帧的屏幕背光亮度; 或者当所述目标值大于所述初始值, 当确 定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕 背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的目标值, 确定所 述第 n+1帧的屏幕背光亮度为所述第 n帧的屏幕背光亮度与所述亮度变化量 的和, 其中所述第 n 帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述 第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度。
或者, 第二确定模块 1522用于当所述目标值小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光亮度向第 n+1帧的屏幕背光亮 度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的目标值, 确定所 述第 n+1帧的屏幕背光亮度为所述第 n帧的屏幕背光亮度与所述亮度变化量 的和, 其中所述第 n 帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述 第 n+1 帧的屏幕背光亮度为所述下一帧的屏幕背光亮度; 或者当所述目标值 小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n帧的屏幕背光 亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光 亮度的目标值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏幕背光亮度的目 标值, 其中所述第 n 帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述 第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度。
或者, 第一确定模块 1521用于根据所述当前帧的屏幕背光亮度, 确定所 述亮度变化量; 或者根据所述环境光亮度, 确定所述亮度变化量; 或者根据 所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
具体地, 第一确定模块 1521用于: 当所述目标值 B大于所述初始值 A, 所述根据所述当前帧的所述屏幕背光亮度 Χπ,确定所述亮度变化量 Fn为: Fn=N * (Xn/d); 当所述目标值 B' 小于所述初始值 Α' , 所述根据所述当前帧的所 述屏幕背光亮度 Χπ' , 确定所述亮度变化量 Fn, 为: Fn' =-Μ * (Χη' /C2) ; 其 中, N和 M均为正数, 和 均为正整数。
或者, 具体地, 第一确定模块 1521用于: 当所述目标值 B大于所述初始 值 A, 所述根据所述环境光亮度 L , 确定所述亮度变化量 Fn为: Fn=N * (I DJ ; 当所述目标值 B' 小于所述初始值 Α' , 所述根据所述环境光亮度 L' , 确定所 述亮度变化量 Fn, 为: Fn, =_M * (L, AD2) ; 其中, N和 M均为正数, D2 均大于 0且小于 1。
或者, 具体地, 第一确定模块 1521用于: 当所述目标值 B大于所述初始 值 A, 所述根据所述当前帧的所述屏幕背光亮度 Χπ和所述环境光亮度 L , 确定 所述亮度变化量 Fn为: Fn=N * (Xn/d) * (I DJ ; 当所述目标值 B' 小于所述 初始值 A,, 所述根据所述当前帧的所述屏幕背光亮度 Χπ, 和所述环境光亮度 L' , 确定当前帧的亮度变化量 Fn, 为: Fn, =_Μ * (Χη' /C2) * (L, AD2) ; 其 中, N和 M均为正数, 和 均为正整数, D^。D2均大于 0且小于 1。
以上, N/C1的范围在 0. 01-1之间, M/C2的范围在 0. 005-0. 1之间。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
图 17示出了才艮据本发明实施例的终端的结构示意图。 如图 17所示, 终 端 170包括检测设备 171、 控制设备 172和驱动设备 173。 其中:
检测设备 171用于确定当前帧的屏幕背光亮度;
控制设备 172用于根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确 定从所述当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化 量;
驱动设备 173 用于根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
可选地, 控制设备 172 用于根据所述当前帧的屏幕背光亮度, 确定所述 亮度变化量; 或者根据所述环境光亮度, 确定所述亮度变化量; 或者根据所 述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
可选地, 驱动设备 173 用于当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下 一帧的屏幕背光亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度 的目标值的情况下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或者当所 述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光亮度与 从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变 化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
或者, 驱动设备 173 用于当所述屏幕背光亮度的目标值小于初始值, 在 确定所述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所述下一 帧的屏幕背光亮度变化时的亮度变化量的和大于或等于所述屏幕背光亮度的 目标值的情况下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整 为所述下一帧的屏幕背光亮度; 或者当所述屏幕背光亮度的目标值小于初始 值, 在确定所述当前帧的屏幕背光亮度与从所述当前帧的屏幕背光亮度向所 述下一帧的屏幕背光亮度变化时的亮度变化量的和小于所述屏幕背光亮度的 目标值的情况下, 按照所述目标值与所述当前帧的屏幕背光亮度的差值, 从 所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
本领域的技术人员容易理解, 检测设备 171可以由各种感光传感器实现, 也可以是其他能够对光的强度进行检测的装置; 控制设备 172 可以由具有计 算能力的装置实现, 例如中央处理器 CPU等; 驱动设备 173是由具有背光光 源驱动能力的装置所实现, 例如背光驱动器等。
由此可见, 本发明实施例考虑了屏幕背光亮度和 /或环境光亮度, 因此在 调整屏幕亮度的过程中, 人眼可能不会感觉到屏幕亮度的变化。 同时, 本发 明实施例针对不同的屏幕背光亮度和 /或环境光亮度釆用不同的渐变过程, 这 样屏幕背光亮度的变化更加平滑, 从而有利于人眼平滑适应不同亮度及不同 敏感度。
应理解, 本发明的每个权利要求所叙述的方案也应看做是一个实施例, 并且是权利要求中的特征是可以结合的, 如本发明中的判断步骤后的执行的 不同分支的步骤可以作为不同的实施例。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结 合来实现。 这些功能究竟以硬件还是软件方式来执行, 取决于技术方案的特 定应用和设计约束条件。 专业技术人员可以对每个特定的应用来使用不同方 法来实现所描述的功能, 但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描 述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应 过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露装置和方法, 可 以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另外 的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个系统, 或 一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或 直接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合或通信连 接, 可以是电性, 机械或其它的形式。 为单元显示的部件可以是或者也可以不是物理单元。 可以根据实际的需要选 择其中的部分或者全部单元来实现本实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单 元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用 时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的 技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可 以以软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者 网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。 而前述的 存储介质包括: U盘、 移动硬盘、 只读存储器(ROM, Read-Only Memory ), 随 机存取存储器 (RAM , Random Acce s s Memory ), 磁碟或者光盘等各种可以存 储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应所述以权利要求的保护范围为准。

Claims

权 利 要求 书
1、 一种调整屏幕背光亮度的方法, 其特征在于, 包括:
确定所述屏幕背光亮度的初始值和目标值;
根据从当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化 量, 对所述下一帧的屏幕背光亮度进行调整, 直到使所述屏幕背光亮度从所述 初始值调整为所述目标值, 其中, 所述当前帧的屏幕背光亮度向所述下一帧的 屏幕背光亮度变化时的亮度变化量与以下因素之一或其组合有关: 所述当前帧 的屏幕背光亮度和环境光亮度。
2、 根据权利要求 1所述的方法, 其特征在于, 所述根据从当前帧的屏幕背 光亮度向下一帧的屏幕背光亮度变化时的亮度变化量, 对所述下一帧的屏幕背 光亮度进行调整, 直到使所述屏幕背光亮度从所述初始值调整为所述目标值, 包括:
根据所述当前帧的屏幕背光亮度和 /或所述环境光亮度, 确定从所述当前帧 的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量;
基于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所述下一帧的 屏幕背光亮度, 直到使所述屏幕背光亮度从所述初始值调整为所述目标值。
3、 根据权利要求 2所述的方法, 其特征在于, 所述基于所述当前帧的屏幕 背光亮度以及所述亮度变化量, 确定所述下一帧的屏幕背光亮度, 包括:
当所述目标值大于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和大于或 等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏 幕背光亮度的目标值, 其中所述第 n 帧的屏幕背光亮度为所述当前帧的屏幕背 光亮度, 所述第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度; 或者 当所述目标值大于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所 述屏幕背光亮度的目标值, 确定所述第 n+1帧的屏幕背光亮度为所述第 n帧的 屏幕背光亮度与所述亮度变化量的和, 其中所述第 n 帧的屏幕背光亮度为所述 当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一帧的屏幕背 光亮度。
4、 根据权利要求 2所述的方法, 其特征在于, 所述基于所述当前帧的屏幕 背光亮度以及所述亮度变化量, 确定所述下一帧的屏幕背光亮度, 包括:
当所述目标值小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和大于或 等于所述屏幕背光亮度的目标值,确定所述第 n+1帧的屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所述第 n 帧的屏幕背光亮度为 所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一帧的屏 幕背光亮度; 或者
当所述目标值小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所 述屏幕背光亮度的目标值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏幕背光 亮度的目标值, 其中所述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度。
5、 根据权利要求 2至 4所述的方法, 其特征在于, 所述根据所述当前帧的 屏幕背光亮度和 /或所述环境光亮度, 确定从所述当前帧的屏幕背光亮度向所述 下一帧的屏幕背光亮度变化时的亮度变化量, 包括:
根据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者
根据所述环境光亮度, 确定所述亮度变化量; 或者
根据所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
6、 根据权利要求 5所述的方法, 其特征在于,
当所述目标值 B大于所述初始值 A,所述才艮据所述当前帧的所述屏幕背光亮 度 Χπ, 确定所述亮度变化量 Fn为: Fn=N * (Xn/d);
当所述目标值 B, 小于所述初始值 A,, 所述才艮据所述当前帧的所述屏幕背 光亮度 Χπ' , 确定所述亮度变化量 Fn' 为: Fn' =-M * (Χη' /C2) ;
其中, N和 M均为正数, 和 均为正整数。
7、 根据权利要求 5所述的方法, 其特征在于,
当所述目标值 B大于所述初始值 A, 所述根据所述环境光亮度 L , 确定所述 亮度变化量 Fn为: Fn=N * (I DJ ;
当所述目标值 B' 小于所述初始值 Α' , 所述根据所述环境光亮度 L' , 确定 所述亮度变化量 Fn' 为: Fn' =_M * (L' AD2);
其中, N和 M均为正数, D^o D2均大于 0且小于 1。
8、 根据权利要求 5所述的方法, 其特征在于,
当所述目标值 B大于所述初始值 A,所述才艮据所述当前帧的所述屏幕背光亮 度 Χπ和所述环境光亮度 L , 确定所述亮度变化量 Fn为: Fn=N * (Xn/d) * (I DJ ; 当所述目标值 B, 小于所述初始值 A,, 所述才艮据所述当前帧的所述屏幕背 光亮度 Χπ' 和所述环境光亮度 L' , 确定当前帧的亮度变化量 Fn' 为: Fn' =-M * (Χ„' /C2) * (L, AD2) ;
其中, N和 M均为正数, 和 均为正整数, D^。D2均大于 0且小于 1。
9、 根据权利要求 6或 8所述的方法, 其特征在于, 范围在 0. 01-1 之间, M/C2的范围在 0. 005-0. 1之间。
10、 一种调整屏幕背光亮度的方法, 其特征在于, 包括:
确定当前帧的屏幕背光亮度;
根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从所述当前帧的屏 幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量;
根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕 背光亮度调整为所述下一帧的屏幕背光亮度。
11、 根据权利要求 10所述的方法, 其特征在于, 所述根据所述当前帧的屏 幕背光亮度和 /或环境光亮度, 确定从所述当前帧的屏幕背光亮度向下一帧的屏 幕背光亮度变化时的亮度变化量, 包括: 根据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者
根据所述环境光亮度, 确定所述亮度变化量; 或者
根据所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
12、 根据权利要求 10或 11所述的方法, 其特征在于, 根据所述当前帧的 屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下 一帧的屏幕背光亮度, 包括:
当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值的情况下, 按照所述目标 值与所述当前帧的屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为 所述下一帧的屏幕背光亮度; 或者
当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
13、 根据权利要求 10或 11所述的方法, 其特征在于, 所述根据所述当前 帧的屏幕背光亮度和所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所 述下一帧的屏幕背光亮度, 包括:
当所述屏幕背光亮度的目标值小于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值的情况下, 按照所述亮度 变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或 者
当所述屏幕背光亮度的目标值小于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述目标值与所 述当前帧的屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为所述下 一帧的屏幕背光亮度。
14、 一种调整屏幕背光亮度的装置, 其特征在于, 包括:
第一确定单元, 用于确定所述屏幕背光亮度的初始值和目标值;
第一调整单元, 用于根据从当前帧的屏幕背光亮度向下一帧的屏幕背光亮 度变化时的亮度变化量, 对所述下一帧的屏幕背光亮度进行调整, 直到使所述 屏幕背光亮度从所述初始值调整为所述目标值, 其中, 所述当前帧的屏幕背光 亮度向所述下一帧的屏幕背光亮度变化时的亮度变化量与以下因素之一或其组 合有关: 所述当前帧的屏幕背光亮度和环境光亮度。
15、 根据权利要求 14所述的装置, 其特征在于, 所述第一调整单元包括: 第一确定模块, 用于根据所述当前帧的屏幕背光亮度和 /或所述环境光亮 度, 确定从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的 亮度变化量;
第二确定模块, 用于基于所述当前帧的屏幕背光亮度以及所述亮度变化量, 确定所述下一帧的屏幕背光亮度, 直到使所述屏幕背光亮度从所述初始值调整 为所述目标值。
16、 根据权利要求 15所述的装置, 其特征在于, 所述第二确定模块用于: 当所述目标值大于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和大于或 等于所述屏幕背光亮度的目标值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏 幕背光亮度的目标值, 其中所述第 n 帧的屏幕背光亮度为所述当前帧的屏幕背 光亮度, 所述第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度; 或者 当所述目标值大于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所 述屏幕背光亮度的目标值, 确定所述第 n+1帧的屏幕背光亮度为所述第 n帧的 屏幕背光亮度与所述亮度变化量的和, 其中所述第 n 帧的屏幕背光亮度为所述 当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一帧的屏幕背 光亮度。
17、 根据权利要求 15所述的装置, 其特征在于, 所述第二确定模块用于: 当所述目标值小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和大于或 等于所述屏幕背光亮度的目标值,确定所述第 n+1帧的屏幕背光亮度为所述第 n 帧的屏幕背光亮度与所述亮度变化量的和, 其中所述第 n 帧的屏幕背光亮度为 所述当前帧的屏幕背光亮度, 所述第 n+1 帧的屏幕背光亮度为所述下一帧的屏 幕背光亮度; 或者
当所述目标值小于所述初始值, 当确定第 n帧的屏幕背光亮度与从所述第 n 帧的屏幕背光亮度向第 n+1 帧的屏幕背光亮度变化时的亮度变化量的和小于所 述屏幕背光亮度的目标值, 确定所述第 n+1 帧的屏幕背光亮度为所述屏幕背光 亮度的目标值, 其中所述第 n帧的屏幕背光亮度为所述当前帧的屏幕背光亮度, 所述第 n+1帧的屏幕背光亮度为所述下一帧的屏幕背光亮度。
18、 根据权利要求 15至 17 中任一项所述的装置, 其特征在于, 所述第一 确定模块用于:
根据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者
根据所述环境光亮度, 确定所述亮度变化量; 或者
根据所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
19、 根据权利要求 18所述的装置, 其特征在于, 第一确定模块具体用于: 当所述目标值 B大于所述初始值 A ,所述才艮据所述当前帧的所述屏幕背光亮 度 Χπ , 确定所述亮度变化量 Fn为: Fn=N * (Xn/d);
当所述目标值 B, 小于所述初始值 A,, 所述才艮据所述当前帧的所述屏幕背 光亮度 Χπ' , 确定所述亮度变化量 Fn' 为: Fn' =-Μ * (Χη' /C2) ;
其中, N和 M均为正数, 和 均为正整数。
20、 根据权利要求 18所述的装置, 其特征在于, 第一确定模块具体用于: 当所述目标值 B大于所述初始值 A, 所述根据所述环境光亮度 L , 确定所述 亮度变化量 Fn为: Fn=N * (I DJ ;
当所述目标值 B' 小于所述初始值 Α' , 所述根据所述环境光亮度 L' , 确定 所述亮度变化量 Fn' 为: Fn' =_M * (L' AD2);
其中, N和 M均为正数, D^o D2均大于 0且小于 1。
21、 根据权利要求 18所述的装置, 其特征在于, 第一确定模块具体用于: 当所述目标值 B大于所述初始值 A,所述才艮据所述当前帧的所述屏幕背光亮 度 Χπ和所述环境光亮度 L , 确定所述亮度变化量 Fn为: Fn=N * (Xn/d) * (I DJ ; 当所述目标值 B, 小于所述初始值 A,, 所述才艮据所述当前帧的所述屏幕背 光亮度 Χπ' 和所述环境光亮度 L' , 确定当前帧的亮度变化量 Fn' 为: Fn' =-M * (Χ„' /C2) * (L, AD2) ;
其中, N和 M均为正数, 和 均为正整数, D^。D2均大于 0且小于 1。
22、根据权利要求 19或 21所述的装置,其特征在于, 范围在 0. 01-1 之间, M/C2的范围在 0. 005-0. 1之间。
23、 一种终端, 其特征在于, 包括:
检测设备, 用于确定当前帧的屏幕背光亮度;
控制设备, 用于根据所述当前帧的屏幕背光亮度和 /或环境光亮度, 确定从 所述当前帧的屏幕背光亮度向下一帧的屏幕背光亮度变化时的亮度变化量; 驱动设备, 用于根据所述当前帧的屏幕背光亮度和所述亮度变化量, 从所 述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
24、 根据权利要求 23所述的终端, 其特征在于, 所述控制设备用于: 根据所述当前帧的屏幕背光亮度, 确定所述亮度变化量; 或者
根据所述环境光亮度, 确定所述亮度变化量; 或者
根据所述当前帧的屏幕背光亮度和所述环境光亮度, 确定所述亮度变化量。
25、 根据权利要求 23或 24所述的终端, 其特征在于, 所述驱动设备用于: 当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值的情况下, 按照所述目标 值与所述当前帧的屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为 所述下一帧的屏幕背光亮度; 或者
当所述屏幕背光亮度的目标值大于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述亮度变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度。
26、 根据权利要求 23或 24所述的终端, 其特征在于, 所述驱动设备用于: 当所述屏幕背光亮度的目标值小于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和大于或等于所述屏幕背光亮度的目标值的情况下, 按照所述亮度 变化量, 从所述当前帧的屏幕背光亮度调整为所述下一帧的屏幕背光亮度; 或 者
当所述屏幕背光亮度的目标值小于初始值, 在确定所述当前帧的屏幕背光 亮度与从所述当前帧的屏幕背光亮度向所述下一帧的屏幕背光亮度变化时的亮 度变化量的和小于所述屏幕背光亮度的目标值的情况下, 按照所述目标值与所 述当前帧的屏幕背光亮度的差值, 从所述当前帧的屏幕背光亮度调整为所述下 一帧的屏幕背光亮度。
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