WO2018171112A1 - 视角切换方法及装置 - Google Patents

视角切换方法及装置 Download PDF

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Publication number
WO2018171112A1
WO2018171112A1 PCT/CN2017/097885 CN2017097885W WO2018171112A1 WO 2018171112 A1 WO2018171112 A1 WO 2018171112A1 CN 2017097885 W CN2017097885 W CN 2017097885W WO 2018171112 A1 WO2018171112 A1 WO 2018171112A1
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WO
WIPO (PCT)
Prior art keywords
viewing angle
image
value
gray value
display screen
Prior art date
Application number
PCT/CN2017/097885
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English (en)
French (fr)
Inventor
李国盛
Original Assignee
北京小米移动软件有限公司
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Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to JP2017554499A priority Critical patent/JP2019514031A/ja
Priority to RU2018122701A priority patent/RU2689440C1/ru
Publication of WO2018171112A1 publication Critical patent/WO2018171112A1/zh

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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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
    • 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
    • G09G2340/14—Solving problems related to the presentation of information to be displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user

Definitions

  • the present disclosure relates to the field of electronic technologies, and in particular, to a viewing angle switching method and apparatus.
  • the display is one of the most common input and output devices on electronic devices and can be used to display text, images, videos, and more.
  • the display screen is often switched between a small viewing angle and a wide viewing angle.
  • the small viewing angle is the viewing angle when the display screen uses the collimated backlight
  • the wide viewing angle is the viewing angle when the display screen uses the divergent backlight.
  • the viewing angle of the display screen at a small viewing angle is smaller than the viewing angle of the display screen at a wide viewing angle.
  • the display screen uses a collimated backlight at a small viewing angle and a divergent backlight at a wide viewing angle
  • the screen brightness at a small viewing angle is greater than the screen brightness at a wide viewing angle in the case where the image gradation of the displayed image is the same.
  • the brightness of the screen changes after the viewing angle is switched, which results in a decrease in display performance. Therefore, there is a need for a viewing angle switching method that can improve display performance.
  • the present disclosure provides a viewing angle switching method and apparatus.
  • a viewing angle switching method comprising:
  • the angle of view switching instruction is used to indicate that the display screen is switched between a small angle of view and a wide angle of view when the angle of view switching instruction is detected
  • the display screen uses a collimated backlight when the viewing angle is small, and the divergent backlight is used when the display screen is at a wide viewing angle;
  • the target gray value being capable of obtaining a screen brightness value that is the same as a screen brightness value before switching after the switched viewing angle grayscale value
  • the display screen is switched between a small viewing angle and a wide viewing angle, and the image gradation of the image is set to the target gradation value.
  • the determining the target gray value based on the current viewing angle of the display screen and the gray value of the image includes:
  • the method before the determining the target gray value by using the preset adjustment curve based on the current viewing angle of the display screen and the gray value of the image, the method further includes:
  • the first preset The brightness curve is used to indicate the relationship between the image gradation and the screen brightness at the small viewing angle
  • the second preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at the wide viewing angle.
  • the determining, according to the current viewing angle of the display screen and the gray value of the image, determining a target gray value by using a preset adjustment curve includes:
  • the image gradation value is an independent variable, acquiring an ordinate of a point on the preset adjustment curve whose abscissa is the gradation value of the image, and determining the obtained ordinate as the target gradation value;
  • an abscissa of a point whose ordinate is the gradation value of the image on the preset adjustment curve is acquired, and the acquired abscissa is determined as the target gradation value.
  • the determining the target gray value based on the current viewing angle of the display screen and the gray value of the image includes:
  • a target gray value by using a first preset brightness curve and a second preset brightness curve based on a current viewing angle of the display screen and the image gray value, the first preset brightness curve being used to indicate the small The relationship between the image gradation and the screen brightness under the viewing angle, and the second preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at the wide viewing angle.
  • the determining, according to the current viewing angle of the display screen and the gray value of the image, the target gray value by using the first preset brightness curve and the second preset brightness curve including:
  • the image gradation value corresponding to the luminance value is used as the target gradation value.
  • a viewing angle switching device comprising:
  • an acquiring module configured to determine a current viewing angle of the display screen when acquiring the viewing angle switching instruction, and obtain a current image grayscale value of the displayed image, where the viewing angle switching instruction is used to indicate that the display screen is in a small viewing angle and a wide angle Switching between viewing angles, using a collimated backlight when the display is at a small viewing angle, and using a divergent backlight when the display is at a wide viewing angle;
  • a determining module configured to determine a target gray value based on a current viewing angle of the display screen and the image gray value, the target gray value being the same as a screen brightness value before switching after the switched viewing angle Gray value of the screen brightness value;
  • a switching module configured to switch the display screen between a small viewing angle and a wide viewing angle, and set an image gray level of the image to the target gray value.
  • the determining module includes:
  • a first determining submodule configured to determine, according to a current viewing angle of the display screen and the gray value of the image, a target grayscale value by using a preset adjustment curve, where the preset adjustment curve is used to indicate that the screen brightness is the same.
  • the determining module further includes:
  • generating a submodule configured to generate the preset adjustment curve based on the first preset brightness curve and the second preset brightness curve, where the first preset brightness curve is used to indicate image gray level and the screen in the small angle of view The relationship between the brightness, the second preset brightness curve is used to indicate the relationship between the image gray level and the screen brightness at the wide viewing angle.
  • the first determining submodule is configured to:
  • the image gradation value is an independent variable, acquiring an ordinate of a point on the preset adjustment curve whose abscissa is the gradation value of the image, and determining the obtained ordinate as the target gradation value;
  • an abscissa of a point whose ordinate is the gradation value of the image on the preset adjustment curve is acquired, and the acquired abscissa is determined as the target gradation value.
  • the determining module includes:
  • a second determining submodule configured to determine a target gray value by using a first preset brightness curve and a second preset brightness curve based on a current viewing angle of the display screen and the image gray value, the first preset The brightness curve is used to indicate the relationship between the image gradation and the screen brightness at the small viewing angle, and the second preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at the wide viewing angle.
  • the second determining submodule is configured to:
  • the image gradation value corresponding to the luminance value is used as the target gradation value.
  • a viewing angle switching device comprising:
  • a memory for storing processor executable instructions
  • processor is configured to:
  • the angle of view switching instruction is used to indicate that the display screen is switched between a small angle of view and a wide angle of view when the angle of view switching instruction is detected
  • the display screen uses a collimated backlight when the viewing angle is small, and the divergent backlight is used when the display screen is at a wide viewing angle;
  • the target gray value being The gray value of the screen brightness value which is the same as the screen brightness value before the switching can be obtained from the perspective of the switching;
  • the display screen is switched between a small viewing angle and a wide viewing angle, and the image gradation of the image is set to the target gradation value.
  • the technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: in the embodiment of the present disclosure, when the view switching instruction is detected, the current viewing angle of the display screen may be determined, and the current image gray value of the displayed image may be acquired. And determining the target gray value based on the current viewing angle of the display screen and the gray value of the image. Since the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching, the display screen can be displayed at a small angle and wide after determining the target gray value. Switching between the angles of view, and setting the image gray level of the image to the target gray value while switching, the screen brightness is unchanged before and after the angle switching, thereby avoiding the screen being bright or dimmed when the angle of view is switched. The situation improves display performance.
  • FIG. 1 is a flowchart of a view switching method according to an exemplary embodiment.
  • FIG. 2A is a flowchart of another perspective switching method according to an exemplary embodiment.
  • FIG. 2B is a schematic diagram of a preset adjustment curve according to an exemplary embodiment.
  • FIG. 2C is a schematic diagram showing a first preset brightness curve and a second preset brightness curve according to an exemplary embodiment.
  • FIG. 3 is a block diagram of a view switching device according to an exemplary embodiment.
  • FIG. 4 is a block diagram of another view switching device according to an exemplary embodiment.
  • the embodiments of the present disclosure provide A viewing angle switching method is provided to improve display performance when the viewing angle is switched.
  • FIG. 1 is a flowchart of a method for switching a view, which is applied to a terminal, according to an exemplary embodiment. As shown in Figure 1, the method includes the following steps.
  • step 101 when a view angle switching instruction is detected, determining a current angle of view of the display screen, and acquiring a current image gray value of the displayed image, the angle of view switching instruction is for indicating that the display screen is between the small angle of view and the wide angle of view.
  • the display uses a collimated backlight at a small viewing angle, and the divergent backlight is used when the display is at a wide viewing angle.
  • step 102 based on the current viewing angle of the display screen and the image gray value, the target gray value is determined, and the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching. Degree value.
  • step 103 the display screen is switched between a small viewing angle and a wide viewing angle, and the image gradation of the image is set to the target gradation value.
  • the current viewing angle of the display screen may be determined, and the current image gray value of the displayed image may be obtained, and then based on the current viewing angle of the display screen and the gray value of the image.
  • Determine the target gray value Since the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching, the display screen can be displayed at a small angle and wide after determining the target gray value. Switching between the angles of view, and setting the image gray level of the image to the target gray value while switching, the screen brightness is unchanged before and after the angle switching, thereby avoiding the screen being bright or dimmed when the angle of view is switched. The situation improves display performance.
  • determining the target gray value based on the current viewing angle of the display screen and the image gray value including:
  • the target gray value is determined by a preset adjustment curve based on the current viewing angle of the display screen and the image gray value.
  • the preset adjustment curve is used to indicate the gray level of the image at a small viewing angle and the gray level of the image at a wide viewing angle when the screen brightness is the same. Relationship between.
  • the method before determining the target gray value by using the preset adjustment curve based on the current viewing angle of the display screen and the image gray value, the method further includes:
  • the first preset brightness curve is used to indicate a relationship between image gray level and screen brightness at a small angle of view
  • the second preset brightness curve Used to indicate the relationship between image grayscale and screen brightness at a wide viewing angle
  • determining the target gray value by using the preset adjustment curve based on the current viewing angle of the display screen and the image gray value including:
  • the ordinate of the point whose abscissa is the gray value of the image on the preset adjustment curve is obtained, and the obtained ordinate is determined as the target gray value;
  • the abscissa of the point whose ordinate is the image gradation value on the preset adjustment curve is acquired, and the acquired abscissa is determined as the target gradation value.
  • determining the target gray value based on the current viewing angle of the display screen and the image gray value including:
  • the first preset brightness curve and the second preset brightness curve are determined Determining the target gray value, the first preset brightness curve is used to indicate the relationship between the image gray level and the screen brightness at a small viewing angle, and the second preset brightness curve is used to indicate the image gray level and the screen brightness between the wide viewing angles. relationship.
  • determining the target gray value by using the first preset brightness curve and the second preset brightness curve based on the current viewing angle of the display screen and the image gray value including:
  • the screen brightness value corresponding to the image gray value is obtained from the first preset brightness curve, and the image gray value corresponding to the screen brightness value is obtained as the target from the second preset brightness curve.
  • grayscale value
  • the screen brightness value corresponding to the image gray value is obtained from the second preset brightness curve, and the image gray value corresponding to the screen brightness value is obtained as the target from the first preset brightness curve. grayscale value.
  • FIG. 2A is a flowchart of a view switching method, which is applied to a terminal, according to an exemplary embodiment. As shown in FIG. 2A, the method includes the following steps.
  • step 201 when the view angle switching instruction is detected, the current angle of view of the display screen is determined, and the current image gray value of the displayed image is acquired.
  • the view switching instruction is used to instruct to switch the display screen between a small viewing angle and a wide viewing angle.
  • the viewing angle switching instruction may be used to indicate that the viewing angle of the display screen is switched to a wide viewing angle; when the current viewing angle of the display screen is a wide viewing angle, the viewing angle switching instruction may be used to indicate Switch the viewing angle of the display to a small viewing angle.
  • the view switching instruction may be triggered by the user, and the user may trigger by specifying the operation, and the specified operation may be a click operation, a double-click operation, a voice operation, or the like.
  • the view switching instruction can also be automatically triggered by the terminal, which is not limited by the embodiment of the disclosure.
  • a collimated backlight can be used when the display is at a small viewing angle
  • a divergent backlight can be used when the display is at a wide viewing angle.
  • the backlight is collimated, the light of the backlight is emitted perpendicular to the display screen, and the light of the backlight is oblique to the display when the backlight is diverged.
  • the operation of determining the current viewing angle of the display may be: determining whether the currently used collimated backlight or the divergent backlight; when the current use is collimation When backlighting, it is determined that the current viewing angle of the display screen is a small viewing angle; when the divergent backlight is currently used, it is determined that the current viewing angle of the display screen is a wide viewing angle.
  • the operation of obtaining the current image gray value of the displayed image is similar to the operation of acquiring the image gray value of the image in the related art, which is not elaborated in the embodiment of the present disclosure.
  • a target gray value is determined based on the current viewing angle of the display screen and the grayscale value of the image.
  • the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching, and the screen brightness value before the switching is the image gray value is displayed.
  • the viewing angle before switching is a wide viewing angle
  • the switched viewing angle is a small viewing angle
  • the target gray value is The screen brightness value obtained at a small viewing angle is the same as the screen brightness value obtained at a wide viewing angle of the image gray value.
  • the target gray value when determining the target gray value, may be determined by the preset adjustment curve based on the current viewing angle of the display screen and the gray value of the image. The determination efficiency and determination accuracy of the gray value are high.
  • the preset adjustment curve may be set in advance, and the preset adjustment curve is used to indicate the relationship between the image gradation at a small viewing angle and the image gradation at a wide viewing angle when the screen brightness is the same. That is, for each point on the preset adjustment curve, the screen brightness of the point obtained at the corresponding angle of view is the same as the screen brightness obtained at the corresponding angle of view of the point.
  • the preset adjustment curve is curve l
  • the independent variable of the preset adjustment curve l is the image gradation at a wide viewing angle
  • the dependent variable is the image gradation at a small angle of view.
  • the operation of determining the target gray value by using the preset adjustment curve based on the current viewing angle of the display screen and the gray value of the image may be: determining the gray value of the image in the preset adjustment curve based on the current viewing angle of the display screen.
  • the independent variable is also a dependent variable; when the gray value of the image is an independent variable, the ordinate of the point whose abscissa is the gray value of the image on the preset adjustment curve is obtained, and the obtained ordinate is determined as the target gray value;
  • the abscissa of the point whose ordinate is the gray value of the image on the preset adjustment curve is acquired, and the acquired abscissa is determined as the target gray value.
  • the preset adjustment curve is curve l
  • the independent variable of the preset adjustment curve l is the image gradation at a wide viewing angle
  • the dependent variable is the image gradation at a small angle of view.
  • the gray value of the image is a dependent variable in the preset adjustment curve l; if the gray value of the image is b, the vertical coordinate on the preset adjustment curve l can be obtained.
  • the abscissa a of the point Q of b is determined as the target gradation value.
  • the preset adjustment curve may be generated based on the first preset brightness curve and the second preset brightness curve.
  • both the first preset brightness curve and the second preset brightness curve may be preset, and the first preset brightness curve is used to indicate the relationship between the image gray level and the screen brightness in the small viewing angle, and second The preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at a wide viewing angle.
  • the first preset brightness curve is the curve m
  • the second preset brightness curve is the curve n
  • the independent variables of the first preset brightness curve m and the second preset brightness curve n are image gray.
  • the dependent variable is the screen brightness.
  • P1(c, d) on the first preset brightness curve m it indicates that the screen brightness obtained by the image gray level c at a small angle of view is d.
  • P2(e, f) on the second preset luminance curve n it indicates that the screen luminance e obtained at a wide viewing angle is f.
  • the operation of generating the preset adjustment curve based on the first preset brightness curve and the second preset brightness curve may be: when the screen brightness in the first preset brightness curve and the screen brightness in the second preset brightness curve are At the same time, determine the first pre- Setting a relationship between the image gray level in the brightness curve and the image gray level in the second preset brightness curve; according to the image gray level in the first preset brightness curve and the image gray level in the second preset brightness curve The relationship between the two, generates a preset adjustment curve.
  • y1 is the screen brightness at a small angle of view
  • x1 is an image at a small angle of view.
  • Grayscale y2 is the screen brightness at a wide viewing angle
  • x2 is the image gradation at a wide viewing angle.
  • x1 0.5x2.
  • the first preset brightness may also be adopted based on the current viewing angle of the display screen and the gray value of the image.
  • the curve and the second predetermined brightness curve determine the target gray value.
  • the screen brightness value corresponding to the gray value of the image may be obtained from the first preset brightness curve, and then the screen brightness value is obtained from the second preset brightness curve.
  • Corresponding image gray value is used as the target gray value; when the current viewing angle of the display screen is a wide viewing angle, the screen brightness value corresponding to the gray value of the image may be obtained from the second preset brightness curve, and then from the first pre- The image gray value corresponding to the screen brightness value is obtained as the target gray value in the brightness curve.
  • the first preset brightness curve is the curve m
  • the second preset brightness curve is the curve n
  • the independent variables of the first preset brightness curve m and the second preset brightness curve n are image gray.
  • the dependent variable is the screen brightness.
  • the screen brightness value d corresponding to the gray value c of the image may be obtained from the first preset brightness curve m, and then from the second preset.
  • the image gradation value g corresponding to the screen brightness value d is obtained as the target gradation value in the luminance curve n.
  • the screen brightness value f corresponding to the gray value e of the image may be obtained from the second preset brightness curve n, and then from the first preset.
  • the image gradation value h corresponding to the screen brightness value f is obtained as the target gradation value in the brightness curve m.
  • step 203 the display screen is switched between a small viewing angle and a wide viewing angle, and the image gradation of the image is set to the target gradation value.
  • the screen brightness value obtained by the target gray value is the same as the screen brightness value before the switching, the image gray level of the image is set while the display screen is switched.
  • the brightness of the screen before and after the switching of the angle of view can be ensured, that is, the screen does not appear bright or dim when the angle of view is switched, thereby improving the display performance and improving the viewing experience of the user.
  • the operation of switching the display screen between the small viewing angle and the wide viewing angle may be: when the display screen is switched from the small viewing angle to the wide viewing angle, the collimated backlight used is adjusted to be a divergent backlight; when the display screen is viewed from a wide viewing angle When switching to a small viewing angle, the divergent backlight used is adjusted to collimate the backlight.
  • the operation of setting the image gradation of the image to the target gradation value is similar to the operation of setting the image gradation of a certain image to a certain gradation value in the related art, which is not elaborated in this embodiment of the present disclosure. .
  • the current viewing angle of the display screen may be determined, and the current image gray value of the displayed image may be obtained, and then based on the current viewing angle of the display screen and the gray value of the image.
  • Determine the target grayscale value Since the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching, the display screen can be displayed at a small angle and wide after determining the target gray value. Switching between the angles of view, and setting the image gray level of the image to the target gray value while switching, the screen brightness is unchanged before and after the angle switching, thereby avoiding the screen being bright or dimmed when the angle of view is switched. The situation improves display performance.
  • FIG. 3 is a block diagram of a view switching device according to an exemplary embodiment.
  • the apparatus includes an acquisition module 301, a determination module 302, and a switching module 303.
  • the obtaining module 301 is configured to determine a current viewing angle of the display screen when the viewing angle switching instruction is detected, and obtain a current image gray value of the displayed image, where the viewing angle switching instruction is used to indicate that the display screen is between the small viewing angle and the wide viewing angle To switch, use a collimated backlight when the display is at a small viewing angle, and use a divergent backlight when the display is at a wide viewing angle;
  • the determining module 302 is configured to determine a target gray value based on a current viewing angle of the display screen and an image gray value, and the target gray value is a screen brightness value that is the same as the screen brightness value before the switching. grayscale value;
  • the switching module 303 is configured to switch the display screen between the small viewing angle and the wide viewing angle, and set the image gray level of the image to the target gray value.
  • the determining module 302 includes a determining sub-module.
  • a first determining sub-module configured to determine a target gray value by using a preset adjustment curve based on a current viewing angle of the display screen and an image gray value, wherein the preset adjustment curve is used to indicate an image gray level and a small viewing angle when the screen brightness is the same The relationship between image gray levels at a wide viewing angle.
  • the determining module further comprises a generating submodule.
  • Generating a submodule configured to generate a preset adjustment curve based on the first preset brightness curve and the second preset brightness curve, where the first preset brightness curve is used to indicate a relationship between image gray level and screen brightness at a small angle of view, The second preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at a wide viewing angle.
  • the first determining submodule is configured to:
  • the ordinate of the point whose abscissa is the gray value of the image on the preset adjustment curve is obtained, and the obtained ordinate is determined as the target gray value;
  • the abscissa of the point whose ordinate is the image gradation value on the preset adjustment curve is acquired, and the acquired abscissa is determined as the target gradation value.
  • the determining module 302 includes a second determining sub-module.
  • a second determining submodule configured to determine a target gray value by using a first preset brightness curve and a second preset brightness curve based on a current viewing angle and an image gray value of the display screen, where the first preset brightness curve is used to indicate small The relationship between the image gradation and the screen brightness at the viewing angle, and the second preset brightness curve is used to indicate the relationship between the image gradation and the screen brightness at a wide viewing angle.
  • the second determining submodule is configured to:
  • the screen corresponding to the gray value of the image is obtained from the first preset brightness curve. a brightness value, and obtaining an image gray value corresponding to the screen brightness value from the second preset brightness curve as the target gray value;
  • the screen brightness value corresponding to the image gray value is obtained from the second preset brightness curve, and the image gray value corresponding to the screen brightness value is obtained as the target from the first preset brightness curve. grayscale value.
  • the current viewing angle of the display screen may be determined, and the current image gray value of the displayed image may be obtained, and then based on the current viewing angle of the display screen and the gray value of the image.
  • Determine the target gray value Since the target gray value is a gray value that can obtain the same screen brightness value as the screen brightness value before the switching, the display screen can be displayed at a small angle and wide after determining the target gray value. Switching between the angles of view, and setting the image gray level of the image to the target gray value while switching, the screen brightness is unchanged before and after the angle switching, thereby avoiding the screen being bright or dimmed when the angle of view is switched. The situation improves display performance.
  • FIG. 4 is a block diagram of a viewing angle switching device 400, according to an exemplary embodiment.
  • device 400 can be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a gaming console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.
  • apparatus 400 can include one or more of the following components: processing component 402, memory 404, power component 406, multimedia component 408, audio component 410, input/output (I/O) interface 412, sensor component 414, And a communication component 416.
  • Processing component 402 typically controls the overall operation of device 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • Processing component 402 can include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above.
  • processing component 402 can include one or more modules to facilitate interaction between component 402 and other components.
  • processing component 402 can include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.
  • Memory 404 is configured to store various types of data to support operation at device 400. Examples of such data include instructions for any application or method operating on device 400, contact data, phone book data, messages, pictures, videos, and the like. Memory 404 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable. Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Disk Disk or Optical Disk.
  • Power component 406 provides power to various components of device 400.
  • Power component 406 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 400.
  • the multimedia component 408 includes a screen between the device 400 and the user that provides an output interface.
  • the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can sense not only touch or slide The boundaries are made, and the duration and pressure associated with the touch or slide operation are also detected.
  • the multimedia component 408 includes a front camera and/or a rear camera. When the device 400 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 410 is configured to output and/or input an audio signal.
  • audio component 410 includes a microphone (MIC) that is configured to receive an external audio signal when device 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode.
  • the received audio signal may be further stored in memory 404 or transmitted via communication component 416.
  • audio component 410 also includes a speaker for outputting an audio signal.
  • the I/O interface 412 provides an interface between the processing component 402 and the peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to, a home button, a volume button, a start button, and a lock button.
  • Sensor assembly 414 includes one or more sensors for providing status assessment of various aspects to device 400.
  • sensor assembly 414 can detect an open/closed state of device 400, a relative positioning of components, such as the display and keypad of device 400, and sensor component 414 can also detect a change in position of one component of device 400 or device 400. The presence or absence of user contact with device 400, device 400 orientation or acceleration/deceleration, and temperature variation of device 400.
  • Sensor assembly 414 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact.
  • Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 414 can also include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • Communication component 416 is configured to facilitate wired or wireless communication between device 400 and other devices.
  • the device 400 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
  • communication component 416 receives broadcast signals or broadcast associated information from an external broadcast management system via a broadcast channel.
  • the communication component 416 also includes a near field communication (NFC) module to facilitate short range communication.
  • NFC near field communication
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • device 400 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor, or other electronic component implementation for performing the above methods.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor, or other electronic component implementation for performing the above methods.
  • non-transitory computer readable storage medium comprising instructions, such as a memory 404 comprising instructions executable by processor 420 of apparatus 400 to perform the above method.
  • the non-transitory computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.
  • a non-transitory computer readable storage medium wherein instructions in the storage medium are executed by a processor of a terminal
  • the terminal is enabled to perform the view switching method provided by the embodiment of FIG. 1 above.

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Abstract

一种视角切换方法及装置，属于电子技术领域。所述方法包括：当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换（101）；基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值（102）；将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值（103）。本方法可以使得视角切换前后屏幕亮度不变，从而避免了视角切换时屏幕出现骤亮或者骤暗的情况，提高了显示性能。

Description

视角切换方法及装置
本申请基于申请号为201710183809.6、申请日为2017年3月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及电子技术领域，尤其涉及一种视角切换方法及装置。
背景技术
显示屏是电子设备上最常见的输入输出设备之一，可以用于显示文字、图像、视频等。目前，为了满足用户不同的观看需求，往往会将显示屏在小视角与广视角之间进行切换，小视角为显示屏使用准直背光时的视角，广视角为显示屏使用发散背光时的视角，且小视角时显示屏的可视角度小于广视角时显示屏的可视角度。然而，由于显示屏处于小视角时使用准直背光，处于广视角时使用发散背光，所以在显示的图像的图像灰度相同的情况下，小视角下的屏幕亮度大于广视角下的屏幕亮度，此时显示屏在视角切换后屏幕亮度会发生变化，从而造成显示性能的降低，因此，亟需一种可以提高显示性能的视角切换方法。
发明内容
为提高视角切换时的显示性能，本公开提供一种视角切换方法及装置。
根据本公开实施例的第一方面，提供一种视角切换方法，所述方法包括：
当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
可选地，所述基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，包括：
基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，所述预设调整曲线用于指示屏幕亮度相同时所述小视角下的图像灰度与所述广视角下的图像灰度之间的关系。
可选地，所述基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值之前，还包括：
基于第一预设亮度曲线和第二预设亮度曲线，生成所述预设调整曲线，所述第一预设 亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
可选地，所述基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，包括：
基于所述显示屏当前的视角，判断所述图像灰度值在所述预设调整曲线中为自变量还是因变量；
当所述图像灰度值为自变量时，获取在所述预设调整曲线上横坐标为所述图像灰度值的点的纵坐标，将获取的纵坐标确定为所述目标灰度值；
当所述图像灰度值为因变量时，获取在所述预设调整曲线上纵坐标为所述图像灰度值的点的横坐标，将获取的横坐标确定为所述目标灰度值。
可选地，所述基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，包括：
基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
可选地，所述基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，包括：
当所述显示屏当前的视角为小视角时，从所述第一预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第二预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值；
当所述显示屏当前的视角为广视角时，从所述第二预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第一预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值。
根据本公开实施例的第二方面，提供一种视角切换装置，所述装置包括：
获取模块，用于当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
确定模块，用于基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
切换模块，用于将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
可选地，所述确定模块包括：
第一确定子模块，用于基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，所述预设调整曲线用于指示屏幕亮度相同时所述小视角下的图像灰度与所述广视角下的图像灰度之间的关系。
可选地，所述确定模块还包括：
生成子模块，用于基于第一预设亮度曲线和第二预设亮度曲线，生成所述预设调整曲线，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
可选地，所述第一确定子模块用于：
基于所述显示屏当前的视角，判断所述图像灰度值在所述预设调整曲线中为自变量还是因变量；
当所述图像灰度值为自变量时，获取在所述预设调整曲线上横坐标为所述图像灰度值的点的纵坐标，将获取的纵坐标确定为所述目标灰度值；
当所述图像灰度值为因变量时，获取在所述预设调整曲线上纵坐标为所述图像灰度值的点的横坐标，将获取的横坐标确定为所述目标灰度值。
可选地，所述确定模块包括：
第二确定子模块，用于基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
可选地，所述第二确定子模块用于：
当所述显示屏当前的视角为小视角时，从所述第一预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第二预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值；
当所述显示屏当前的视角为广视角时，从所述第二预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第一预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值。
根据本公开实施例的第三方面，提供一种视角切换装置，所述装置包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为：
当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为 在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
本公开的实施例提供的技术方案可以包括以下有益效果：在本公开实施例中，当检测到视角切换指令时，可以先确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，再基于显示屏当前的视角和该图像灰度值，确定目标灰度值。由于目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值，因此，在确定目标灰度值之后，可以将显示屏在小视角与广视角之间进行切换，并在切换的同时，将该图像的图像灰度设置为目标灰度值，此时视角切换前后屏幕亮度不变，从而避免了视角切换时屏幕出现骤亮或者骤暗的情况，提高了显示性能。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明的实施例，并与说明书一起用于解释本发明的原理。
图1是根据一示例性实施例示出的一种视角切换方法的流程图。
图2A是根据一示例性实施例示出的另一种视角切换方法的流程图。
图2B是根据一示例性实施例示出的一种预设调整曲线的示意图。
图2C是根据一示例性实施例示出的一种第一预设亮度曲线和第二预设亮度曲线的示意图。
图3是根据一示例性实施例示出的一种视角切换装置的框图。
图4是根据一示例性实施例示出的另一种视角切换装置的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本发明的一些方面相一致的装置和方法的例子。
在对本公开实施例进行详细地解释说明之前，先对本公开实施例的应用场景予以说明。由于显示屏处于小视角时一般使用准直背光，处于广视角时一般使用发散背光，所以在显示的图像的图像灰度相同的情况下，小视角下的屏幕亮度会大于广视角下的屏幕亮度。因此，当显示屏在小视角与广视角之间进行切换时，屏幕亮度会发生变化，如当显示屏从小视角切换到广视角时屏幕亮度会减小，当显示屏从广视角切换到小视角时屏幕亮度会增大，从而造成显示性能的降低，且造成用户观看体验的降低。为此，本公开实施例提 供了一种视角切换方法，来提高视角切换时的显示性能。
图1是根据一示例性实施例示出的一种视角切换方法的流程图，该方法应用于终端。如图1所示，该方法包括以下步骤。
在步骤101中，当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，视角切换指令用于指示将显示屏在小视角与广视角之间进行切换，显示屏处于小视角时使用准直背光，显示屏处于广视角时使用发散背光。
在步骤102中，基于显示屏当前的视角和图像灰度值，确定目标灰度值，目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值。
在步骤103中，将显示屏在小视角与广视角之间进行切换，并将图像的图像灰度设置为目标灰度值。
在本公开实施例中，当检测到视角切换指令时，可以先确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，再基于显示屏当前的视角和该图像灰度值，确定目标灰度值。由于目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值，因此，在确定目标灰度值之后，可以将显示屏在小视角与广视角之间进行切换，并在切换的同时，将该图像的图像灰度设置为目标灰度值，此时视角切换前后屏幕亮度不变，从而避免了视角切换时屏幕出现骤亮或者骤暗的情况，提高了显示性能。
可选地，基于显示屏当前的视角和图像灰度值，确定目标灰度值，包括：
基于显示屏当前的视角和图像灰度值，通过预设调整曲线确定目标灰度值，预设调整曲线用于指示屏幕亮度相同时小视角下的图像灰度与广视角下的图像灰度之间的关系。
可选地，基于显示屏当前的视角和图像灰度值，通过预设调整曲线确定目标灰度值之前，还包括：
基于第一预设亮度曲线和第二预设亮度曲线，生成预设调整曲线，第一预设亮度曲线用于指示小视角下图像灰度与屏幕亮度之间的关系，第二预设亮度曲线用于指示广视角下图像灰度与屏幕亮度之间的关系。
可选地，基于显示屏当前的视角和图像灰度值，通过预设调整曲线确定目标灰度值，包括：
基于显示屏当前的视角，判断图像灰度值在预设调整曲线中为自变量还是因变量；
当图像灰度值为自变量时，获取在预设调整曲线上横坐标为图像灰度值的点的纵坐标，将获取的纵坐标确定为目标灰度值；
当图像灰度值为因变量时，获取在预设调整曲线上纵坐标为图像灰度值的点的横坐标，将获取的横坐标确定为目标灰度值。
可选地，基于显示屏当前的视角和图像灰度值，确定目标灰度值，包括：
基于显示屏当前的视角和图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确 定目标灰度值，第一预设亮度曲线用于指示小视角下图像灰度与屏幕亮度之间的关系，第二预设亮度曲线用于指示广视角下图像灰度与屏幕亮度之间的关系。
可选地，基于显示屏当前的视角和图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，包括：
当显示屏当前的视角为小视角时，从第一预设亮度曲线中获取图像灰度值对应的屏幕亮度值，从第二预设亮度曲线中获取屏幕亮度值对应的图像灰度值作为目标灰度值；
当显示屏当前的视角为广视角时，从第二预设亮度曲线中获取图像灰度值对应的屏幕亮度值，从第一预设亮度曲线中获取屏幕亮度值对应的图像灰度值作为目标灰度值。
上述所有可选技术方案，均可按照任意结合形成本公开的可选实施例，本公开实施例对此不再一一赘述。
图2A是根据一示例性实施例示出的一种视角切换方法的流程图，该方法应用于终端。如图2A所示，该方法包括以下步骤。
在步骤201中，当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值。
需要说明的是，视角切换指令用于指示将显示屏在小视角与广视角之间进行切换。例如，当显示屏当前的视角为小视角时，该视角切换指令可以用于指示将显示屏的视角切换到广视角；当显示屏当前的视角为广视角时，该视角切换指令可以用于指示将显示屏的视角切换到小视角。
另外，该视角切换指令可以由用户触发，且用户可以通过指定操作触发，指定操作可以为单击操作、双击操作、语音操作等。当然，该视角切换指令也可以由终端自动触发，本公开实施例对此不作限定。
再者，显示屏处于小视角时可以使用准直背光，显示屏处于广视角时可以使用发散背光。准直背光时背光源的光线垂直于显示屏射出，发散背光时背光源的光线倾斜于显示屏射出。
其中，由于显示屏处于小视角和处于广视角时使用的背光不同，因此，确定显示屏当前的视角的操作可以为：判断当前使用的是准直背光还是发散背光；当当前使用的是准直背光时，确定显示屏当前的视角为小视角；当当前使用的是发散背光时，确定显示屏当前的视角为广视角。
其中，获取显示的图像当前的图像灰度值的操作与相关技术中获取某个图像的图像灰度值的操作类似，本公开实施例对此不进行详细阐述。
在步骤202中，基于显示屏当前的视角和该图像灰度值，确定目标灰度值。
需要说明的是，目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值，切换前的屏幕亮度值即为该图像灰度值在显示屏当前的视角下得到的屏幕亮度值。例如，切换前的视角为广视角，切换后的视角为小视角，则目标灰度值 在小视角下得到的屏幕亮度值与该图像灰度值在广视角下得到的屏幕亮度值相同。
其中，基于显示屏当前的视角和该图像灰度值，确定目标灰度值时，可以基于显示屏当前的视角和该图像灰度值，通过预设调整曲线确定目标灰度值，此时目标灰度值的确定效率以及确定准确度均较高。
需要说明的是，预设调整曲线可以预先进行设置，且预设调整曲线用于指示屏幕亮度相同时小视角下的图像灰度与广视角下的图像灰度之间的关系。也即是，对于预设调整曲线上的每个点，该点的横坐标在对应的视角下得到的屏幕亮度与该点的纵坐标在对应的视角下得到的屏幕亮度相同。
例如，如图2B所示，预设调整曲线为曲线l，预设调整曲线l的自变量为广视角下的图像灰度，因变量为小视角下的图像灰度。假设预设调整曲线上存在点Q(a,b)，则表明图像灰度a在广视角下得到的屏幕亮度与图像灰度b在小视角下得到的屏幕亮度相同。
其中，基于显示屏当前的视角和该图像灰度值，通过预设调整曲线确定目标灰度值的操作可以为：基于显示屏当前的视角，判断该图像灰度值在预设调整曲线中为自变量还是因变量；当该图像灰度值为自变量时，获取在预设调整曲线上横坐标为该图像灰度值的点的纵坐标，将获取的纵坐标确定为目标灰度值；当该图像灰度值为因变量时，获取在预设调整曲线上纵坐标为该图像灰度值的点的横坐标，将获取的横坐标确定为目标灰度值。
例如，如图2B所示，预设调整曲线为曲线l，预设调整曲线l的自变量为广视角下的图像灰度，因变量为小视角下的图像灰度。假设显示屏当前的视角为广视角，则可以确定该图像灰度值在预设调整曲线l中为自变量；假设该图像灰度值为a，则可以获取在预设调整曲线l上横坐标为a的点Q的纵坐标b，将获取的纵坐标b确定为目标灰度值。假设显示屏当前的视角为小视角，则可以确定该图像灰度值在预设调整曲线l中为因变量；假设该图像灰度值为b，则可以获取在预设调整曲线l上纵坐标为b的点Q的横坐标a，将获取的横坐标a确定为目标灰度值。
进一步地，基于显示屏当前的视角和该图像灰度值，通过预设调整曲线确定目标灰度值之前，还可以基于第一预设亮度曲线和第二预设亮度曲线，生成预设调整曲线。
需要说明的是，第一预设亮度曲线和第二预设亮度曲线均可以预先进行设置，且第一预设亮度曲线用于指示小视角下图像灰度与屏幕亮度之间的关系，第二预设亮度曲线用于指示广视角下图像灰度与屏幕亮度之间的关系。
例如，如图2C所示，第一预设亮度曲线为曲线m，第二预设亮度曲线为曲线n，第一预设亮度曲线m和第二预设亮度曲线n的自变量均为图像灰度，因变量均为屏幕亮度。假设第一预设亮度曲线m上存在点P1(c,d)，则表明图像灰度c在小视角下得到的屏幕亮度为d。假设第二预设亮度曲线n上存在点P2(e,f)，则表明图像灰度e在广视角下得到的屏幕亮度为f。
其中，基于第一预设亮度曲线和第二预设亮度曲线，生成预设调整曲线的操作可以为：当第一预设亮度曲线中的屏幕亮度和第二预设亮度曲线中的屏幕亮度相同时，确定第一预 设亮度曲线中的图像灰度与第二预设亮度曲线中的图像灰度之间的关系；按照第一预设亮度曲线中的图像灰度与第二预设亮度曲线中的图像灰度之间的关系，生成预设调整曲线。
例如，第一预设亮度曲线的函数表达式为y1＝4x1，第二预设亮度曲线的函数表达式为y2＝2x2，其中，y1为小视角下的屏幕亮度，x1为小视角下的图像灰度，y2为广视角下的屏幕亮度，x2为广视角下的图像灰度。当第一预设亮度曲线中的屏幕亮度和第二预设亮度曲线中的屏幕亮度相同时，即当y1＝y2时，可以确定第一预设亮度曲线中的图像灰度与第二预设亮度曲线中的图像灰度之间的关系，即x1与x2之间的关系为x1＝0.5x2。之后，可以基于x1＝0.5x2生成预设调整曲线，x1＝0.5x2为预设调整曲线的函数表达式。
需要说明的是，实际应用中，基于显示屏当前的视角和该图像灰度值，确定目标灰度值时，也可以基于显示屏当前的视角和该图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线来确定目标灰度值。此时，当显示屏当前的视角为小视角时，可以先从第一预设亮度曲线中获取该图像灰度值对应的屏幕亮度值，再从第二预设亮度曲线中获取该屏幕亮度值对应的图像灰度值作为目标灰度值；当显示屏当前的视角为广视角时，可以先从第二预设亮度曲线中获取该图像灰度值对应的屏幕亮度值，再从第一预设亮度曲线中获取该屏幕亮度值对应的图像灰度值作为目标灰度值。
例如，如图2C所示，第一预设亮度曲线为曲线m，第二预设亮度曲线为曲线n，第一预设亮度曲线m和第二预设亮度曲线n的自变量均为图像灰度，因变量均为屏幕亮度。假设显示屏当前的视角为小视角，该图像灰度值为c，则可以先从第一预设亮度曲线m中获取该图像灰度值c对应的屏幕亮度值d，再从第二预设亮度曲线n中获取该屏幕亮度值d对应的图像灰度值g作为目标灰度值。假设显示屏当前的视角为广视角，该图像灰度值为e，则可以先从第二预设亮度曲线n中获取该图像灰度值e对应的屏幕亮度值f，再从第一预设亮度曲线m中获取该屏幕亮度值f对应的图像灰度值h作为目标灰度值。
在步骤203中，将显示屏在小视角与广视角之间进行切换，并将该图像的图像灰度设置为目标灰度值。
需要说明的是，由于目标灰度值在切换后的视角下得到的屏幕亮度值与切换前的屏幕亮度值相同，因此，在对显示屏进行视角切换的同时，将该图像的图像灰度设置为目标灰度值可以保证视角切换前后屏幕亮度不变，即视角切换时屏幕不会出现骤亮或者骤暗的情况，从而提高了显示性能，提高了用户的观看体验。
其中，将显示屏在小视角与广视角之间进行切换的操作可以为：当将显示屏从小视角切换到广视角时，将使用的准直背光调整为发散背光；当将显示屏从广视角切换到小视角时，将使用的发散背光调整为准直背光。
其中，将该图像的图像灰度设置为目标灰度值的操作与相关技术中将某个图像的图像灰度设置为某个灰度值的操作类似，本公开实施例对此不进行详细阐述。
在本公开实施例中，当检测到视角切换指令时，可以先确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，再基于显示屏当前的视角和该图像灰度值，确定目标 灰度值。由于目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值，因此，在确定目标灰度值之后，可以将显示屏在小视角与广视角之间进行切换，并在切换的同时，将该图像的图像灰度设置为目标灰度值，此时视角切换前后屏幕亮度不变，从而避免了视角切换时屏幕出现骤亮或者骤暗的情况，提高了显示性能。
图3是根据一示例性实施例示出的一种视角切换装置的框图。参照图3，该装置包括获取模块301，确定模块302和切换模块303。
获取模块301，用于当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，视角切换指令用于指示将显示屏在小视角与广视角之间进行切换，显示屏处于小视角时使用准直背光，显示屏处于广视角时使用发散背光；
确定模块302，用于基于显示屏当前的视角和图像灰度值，确定目标灰度值，目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
切换模块303，用于将显示屏在小视角与广视角之间进行切换，并将图像的图像灰度设置为目标灰度值。
可选地，确定模块302包括确定子模块。
第一确定子模块，用于基于显示屏当前的视角和图像灰度值，通过预设调整曲线确定目标灰度值，预设调整曲线用于指示屏幕亮度相同时小视角下的图像灰度与广视角下的图像灰度之间的关系。
可选地，确定模块还包括生成子模块。
生成子模块，用于基于第一预设亮度曲线和第二预设亮度曲线，生成预设调整曲线，第一预设亮度曲线用于指示小视角下图像灰度与屏幕亮度之间的关系，第二预设亮度曲线用于指示广视角下图像灰度与屏幕亮度之间的关系。
可选地，第一确定子模块用于：
基于显示屏当前的视角，判断图像灰度值在预设调整曲线中为自变量还是因变量；
当图像灰度值为自变量时，获取在预设调整曲线上横坐标为图像灰度值的点的纵坐标，将获取的纵坐标确定为目标灰度值；
当图像灰度值为因变量时，获取在预设调整曲线上纵坐标为图像灰度值的点的横坐标，将获取的横坐标确定为目标灰度值。
可选地，确定模块302包括第二确定子模块。
第二确定子模块，用于基于显示屏当前的视角和图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，第一预设亮度曲线用于指示小视角下图像灰度与屏幕亮度之间的关系，第二预设亮度曲线用于指示广视角下图像灰度与屏幕亮度之间的关系。
可选地，第二确定子模块用于：
当显示屏当前的视角为小视角时，从第一预设亮度曲线中获取图像灰度值对应的屏幕 亮度值，从第二预设亮度曲线中获取屏幕亮度值对应的图像灰度值作为目标灰度值；
当显示屏当前的视角为广视角时，从第二预设亮度曲线中获取图像灰度值对应的屏幕亮度值，从第一预设亮度曲线中获取屏幕亮度值对应的图像灰度值作为目标灰度值。
在本公开实施例中，当检测到视角切换指令时，可以先确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，再基于显示屏当前的视角和该图像灰度值，确定目标灰度值。由于目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值，因此，在确定目标灰度值之后，可以将显示屏在小视角与广视角之间进行切换，并在切换的同时，将该图像的图像灰度设置为目标灰度值，此时视角切换前后屏幕亮度不变，从而避免了视角切换时屏幕出现骤亮或者骤暗的情况，提高了显示性能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
图4是根据一示例性实施例示出的一种视角切换装置400的框图。例如，装置400可以是移动电话，计算机，数字广播终端，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图4，装置400可以包括以下一个或多个组件：处理组件402，存储器404，电源组件406，多媒体组件408，音频组件410，输入/输出(I/O)的接口412，传感器组件414，以及通信组件416。
处理组件402通常控制装置400的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件402可以包括一个或多个处理器420来执行指令，以完成上述的方法的全部或部分步骤。此外，处理组件402可以包括一个或多个模块，便于处理组件402和其他组件之间的交互。例如，处理组件402可以包括多媒体模块，以方便多媒体组件408和处理组件402之间的交互。
存储器404被配置为存储各种类型的数据以支持在装置400的操作。这些数据的示例包括用于在装置400上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器404可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件406为装置400的各种组件提供电源。电源组件406可以包括电源管理系统，一个或多个电源，及其他与为装置400生成、管理和分配电源相关联的组件。
多媒体组件408包括在所述装置400和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。所述触摸传感器可以不仅感测触摸或滑动动 作的边界，而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件408包括一个前置摄像头和/或后置摄像头。当装置400处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件410被配置为输出和/或输入音频信号。例如，音频组件410包括一个麦克风(MIC)，当装置400处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器404或经由通信组件416发送。在一些实施例中，音频组件410还包括一个扬声器，用于输出音频信号。
I/O接口412为处理组件402和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件414包括一个或多个传感器，用于为装置400提供各个方面的状态评估。例如，传感器组件414可以检测到装置400的打开/关闭状态，组件的相对定位，例如所述组件为装置400的显示器和小键盘，传感器组件414还可以检测装置400或装置400一个组件的位置改变，用户与装置400接触的存在或不存在，装置400方位或加速/减速和装置400的温度变化。传感器组件414可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件414还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件414还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件416被配置为便于装置400和其他设备之间有线或无线方式的通信。装置400可以接入基于通信标准的无线网络，如WiFi，2G或3G，或它们的组合。在一个示例性实施例中，通信组件416经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，所述通信组件416还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术，红外数据协会(IrDA)技术，超宽带(UWB)技术，蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，装置400可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器404，上述指令可由装置400的处理器420执行以完成上述方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
一种非临时性计算机可读存储介质，当所述存储介质中的指令由终端的处理器执行 时，使得终端能够执行上述图1实施例提供的视角切换方法。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本发明的其它实施方案。本申请旨在涵盖本发明的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本发明的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本发明的真正范围和精神由下面的权利要求指出。
应当理解的是，本发明并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本发明的范围仅由所附的权利要求来限制。

Claims (13)

  1. 一种视角切换方法，其特征在于，所述方法包括：
    当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
    基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
    将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
  2. 如权利要求1所述的方法，其特征在于，所述基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，包括：
    基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，所述预设调整曲线用于指示屏幕亮度相同时所述小视角下的图像灰度与所述广视角下的图像灰度之间的关系。
  3. 如权利要求2所述的方法，其特征在于，所述基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值之前，还包括：
    基于第一预设亮度曲线和第二预设亮度曲线，生成所述预设调整曲线，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
  4. 如权利要求2或3所述的方法，其特征在于，所述基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，包括：
    基于所述显示屏当前的视角，判断所述图像灰度值在所述预设调整曲线中为自变量还是因变量；
    当所述图像灰度值为自变量时，获取在所述预设调整曲线上横坐标为所述图像灰度值的点的纵坐标，将获取的纵坐标确定为所述目标灰度值；
    当所述图像灰度值为因变量时，获取在所述预设调整曲线上纵坐标为所述图像灰度值的点的横坐标，将获取的横坐标确定为所述目标灰度值。
  5. 如权利要求1所述的方法，其特征在于，所述基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，包括：
    基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮 度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
  6. 如权利要求5所述的方法，其特征在于，所述基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，包括：
    当所述显示屏当前的视角为小视角时，从所述第一预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第二预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值；
    当所述显示屏当前的视角为广视角时，从所述第二预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第一预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值。
  7. 一种视角切换装置，其特征在于，所述装置包括：
    获取模块，用于当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
    确定模块，用于基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
    切换模块，用于将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
  8. 如权利要求7所述的装置，其特征在于，所述确定模块包括：
    第一确定子模块，用于基于所述显示屏当前的视角和所述图像灰度值，通过预设调整曲线确定目标灰度值，所述预设调整曲线用于指示屏幕亮度相同时所述小视角下的图像灰度与所述广视角下的图像灰度之间的关系。
  9. 如权利要求8所述的装置，其特征在于，所述确定模块还包括：
    生成子模块，用于基于第一预设亮度曲线和第二预设亮度曲线，生成所述预设调整曲线，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
  10. 如权利要求8或9所述的装置，其特征在于，所述第一确定子模块用于：
    基于所述显示屏当前的视角，判断所述图像灰度值在所述预设调整曲线中为自变量还 是因变量；
    当所述图像灰度值为自变量时，获取在所述预设调整曲线上横坐标为所述图像灰度值的点的纵坐标，将获取的纵坐标确定为所述目标灰度值；
    当所述图像灰度值为因变量时，获取在所述预设调整曲线上纵坐标为所述图像灰度值的点的横坐标，将获取的横坐标确定为所述目标灰度值。
  11. 如权利要求7所述的方法，其特征在于，所述确定模块包括：
    第二确定子模块，用于基于所述显示屏当前的视角和所述图像灰度值，通过第一预设亮度曲线和第二预设亮度曲线确定目标灰度值，所述第一预设亮度曲线用于指示所述小视角下图像灰度与屏幕亮度之间的关系，所述第二预设亮度曲线用于指示所述广视角下图像灰度与屏幕亮度之间的关系。
  12. 如权利要求11所述的方法，其特征在于，所述第二确定子模块用于：
    当所述显示屏当前的视角为小视角时，从所述第一预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第二预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值；
    当所述显示屏当前的视角为广视角时，从所述第二预设亮度曲线中获取所述图像灰度值对应的屏幕亮度值，从所述第一预设亮度曲线中获取所述屏幕亮度值对应的图像灰度值作为目标灰度值。
  13. 一种视角切换装置，其特征在于，所述装置包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为：
    当检测到视角切换指令时，确定显示屏当前的视角，以及获取显示的图像当前的图像灰度值，所述视角切换指令用于指示将所述显示屏在小视角与广视角之间进行切换，所述显示屏处于小视角时使用准直背光，所述显示屏处于广视角时使用发散背光；
    基于所述显示屏当前的视角和所述图像灰度值，确定目标灰度值，所述目标灰度值为在切换后的视角下能够得到与切换前的屏幕亮度值相同的屏幕亮度值的灰度值；
    将所述显示屏在小视角与广视角之间进行切换，并将所述图像的图像灰度设置为所述目标灰度值。
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