WO2019200896A1 - 背光调节方法、背光调节装置、显示设备和存储介质 - Google Patents

背光调节方法、背光调节装置、显示设备和存储介质 Download PDF

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Publication number
WO2019200896A1
WO2019200896A1 PCT/CN2018/114553 CN2018114553W WO2019200896A1 WO 2019200896 A1 WO2019200896 A1 WO 2019200896A1 CN 2018114553 W CN2018114553 W CN 2018114553W WO 2019200896 A1 WO2019200896 A1 WO 2019200896A1
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Prior art keywords
backlight
interest
state
region
flag
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PCT/CN2018/114553
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English (en)
French (fr)
Inventor
孙剑
郭子强
唐贞
林琳
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京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US16/480,445 priority Critical patent/US10885876B2/en
Publication of WO2019200896A1 publication Critical patent/WO2019200896A1/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
    • G09G3/36—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 using liquid crystals
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3265—Power saving in display device
    • 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
    • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G06F3/013—Eye tracking input arrangements
    • 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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • 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
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • 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 display technology.
  • the present disclosure relates to a backlight adjustment method, a backlight adjustment device, a display device, and a storage medium.
  • the backlight brightness adjustment technology only the backlight area corresponding to the visual attention area of the user on the displayed image is adjusted, and the backlight area corresponding to the non-attention area is less adjusted.
  • the brightness characteristics of non-interest areas can affect the user's viewing experience.
  • a backlight adjustment method including:
  • the backlight brightness of the region of interest is adjusted with a first precision, and the backlight brightness of the non-region of interest is adjusted with a second accuracy.
  • the backlight adjustment method further includes dynamically determining the point of interest by an eyeball tracking algorithm or a gaze point tracking algorithm.
  • the backlight adjustment method further includes: before determining the attention and non-interest area of the display image according to a point of interest on the display image by the user,
  • Determining whether to acquire a point of interest of the user on the displayed image in response to determining that the point of interest is not acquired, determining a region of interest and a region of non-attention of the displayed image according to a preset position on the displayed image, or The display image is described as a region of interest.
  • the adjusting the backlight brightness of the region of interest with a first precision includes:
  • the current value applied to the plurality of backlight structural units corresponding to the region of interest is adjusted with a first precision.
  • Adjusting the backlight brightness of the non-interest area with the second precision includes:
  • the current value applied to the plurality of backlight structural units corresponding to the non-interest area is adjusted with a second precision.
  • the adjusting, by the first precision, the current value applied to the plurality of backlight structural units corresponding to the region of interest comprises: adjusting, for each backlight structure unit corresponding to the region of interest, the storage in the first cascade register
  • the backlight structure unit has a register value and outputs the adjusted register value.
  • the adjusting the current value of the plurality of backlight structural units corresponding to the non-interest area by the second precision comprises: adjusting, for each backlight structural unit corresponding to the non-interest area, the storage output in the second cascade register The register value of the backlight structure unit, and outputs the adjusted register value.
  • the first cascade register includes a number of base registers greater than the number of base registers included in the second cascade register.
  • the backlight adjustment method further includes:
  • the actual number of cascaded registers is a first number, and the first number of base registers are cascaded according to a variable corresponding to the preset maximum number of cascades, the bit width, and the actual number of cascades of the base register.
  • the second number of base register levels is determined according to a preset maximum number of cascades of the base registers, a bit width, and a macro variable corresponding to the actual number of cascades. Join the second cascade register.
  • the backlight adjustment method further includes: setting the first flag bit to the first state in response to determining the point of interest;
  • the plurality of backlight structure units located in the non-attention area behind the attention area are sequentially traversed until the third flag is set to the first state.
  • the backlight adjustment method further includes:
  • controlling the third counter In response to the second flag changing from the first state to the second state, controlling the third counter to start counting until the third counter of the third counter reaches the third threshold, ending the counting, and setting the third flag to the first status.
  • an embodiment of the present disclosure further provides a backlight adjustment apparatus, including:
  • a region determining unit configured to determine a region of interest and a non-region of interest of the display image according to a point of interest of the user on the displayed image
  • a backlight adjustment unit configured to adjust a backlight brightness of the region of interest determined by the region determining unit with a first precision, and adjust a backlight luminance of the non-region of interest determined by the region determining unit with a second precision.
  • the backlight adjustment unit is further configured to:
  • a current value applied to the plurality of backlight structural units corresponding to the non-interest area is adjusted with a second precision in response to scanning to the non-interest area.
  • the backlight adjustment unit is further configured to perform sequential traversal scanning on the plurality of backlight structural units in the non-attention area located before the attention area, in response to the first flag changing from the first state to the second state, until The second flag bit is set to the first state; when the second flag bit is set to the first state, the plurality of backlight structure units in the region of interest are sequentially traversed until the second flag bit changes from the first state a second state; in response to the second flag changing from the first state to the second state, performing sequential traversal scanning on the plurality of backlight structural units in the non-attention region located behind the attention region until the third flag bit Set to the first state.
  • a backlight adjustment apparatus including:
  • a memory configured to store computer executable instructions; and at least one processor configured to execute the computer executable instructions to perform the steps of any of the backlight adjustment methods described in this disclosure.
  • a display device including an electrically connected display device, a backlight device, and a backlight adjustment computing device according to an embodiment of the present disclosure.
  • the backlight device includes a plurality of backlight structure units, and at least a portion of the backlight structure unit is disposed at an edge region of the backlight device.
  • a computer readable storage medium storing a computer program that, when executed, implements the steps of any one of the backlight adjustment methods described in the embodiments of the present disclosure.
  • FIG. 1 is a schematic flow chart of a backlight adjustment method according to an embodiment of the present disclosure
  • FIG. 2 is a waveform diagram of a flag bit transition in a backlight adjustment method according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flow chart showing an example of scanning a region of interest and a region of non-attention in a backlight adjustment method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural view of a backlight adjusting device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
  • each backlight partition can be separately controlled and adjusted as a minimum adjustment unit (or referred to as a minimum backlight structure unit).
  • Aij represents the brightness of the minimum backlight structural unit, where i represents the number of rows, 1 ⁇ i ⁇ m; j represents the number of columns, 1 ⁇ j ⁇ n; Aij represents the minimum of the i-th row and the j-th column in the backlight region.
  • the brightness of the backlight structure unit, the value of Aij can be adjusted according to the actual demand of the user for the brightness of the displayed image. Then the entire backlight area can be represented by the following luminance matrix (hereinafter referred to as "first matrix”):
  • the visual attention area (the core area of human eye observation) in the display image, and the visual attention area is usually fixed.
  • the visual attention area may be a rectangular area formed by the (m 1 +1)th to the (m 1 +m 2 )th rows and the 1st to nth columns. Therefore, the adjustment of the visual attention area is usually also performed.
  • the introduction of the lens causes distortion.
  • the distortion phenomenon is particularly serious in the edge region of the displayed image, and as the magnification of the lens is larger, the distortion phenomenon is more severe.
  • Embodiments of the present disclosure propose a backlight adjustment method, a backlight adjustment device, a display device, and a storage medium. According to an embodiment of the present disclosure, backlight brightness adjustment for a non-interest area can be achieved and finer adjustment of the dynamic attention area can be achieved while the distortion phenomenon can be reduced.
  • Embodiments of the present disclosure provide a backlight adjustment method. As shown in FIG. 1, a backlight adjustment method according to an embodiment of the present disclosure may include the following steps.
  • the attention area and the non-attention area of the display image are determined according to the point of interest of the user on the image.
  • an eye tracking algorithm or a gaze tracking algorithm may be employed to dynamically determine the point of interest and calculate the point of interest coordinates (x, y). By determining the focus of interest dynamically, the identified concerns can be made more accurate.
  • the radius of the region is further determined centering on the coordinates of the point of interest (x, y), thereby obtaining a region of interest formed by the center and the radius of the region.
  • Other display areas outside the attention area may be non-attention areas, and the attention area and the non-attention area each have a plurality of backlight structural units.
  • One or more non-interest areas may exist depending on the location of the region of interest.
  • the radius of the radius of the region is the same in each direction, so that the region of interest is a circular region with the focal point coordinates as the center and the same radius as the region radius.
  • the radius of the region may include a first distance value ⁇ x in the first direction and a second distance value ⁇ y in the second direction.
  • the first distance value ⁇ x represents the distance between the row of the point of interest coordinate and the row of the region boundary of the first direction
  • the second distance value ⁇ y represents the column of the coordinates of the point of interest.
  • the formed attention area is a rectangular area formed by the area boundary of the first direction and the area boundary of the second direction with the focus point coordinates as the center of the area.
  • the area boundary of the first direction may be determined according to the center of the area and the first distance value ⁇ x
  • the area boundary of the second direction may be determined according to the center of the area and the second distance value ⁇ y .
  • the brightness matrix corresponding to the rectangular area (hereinafter referred to as "second matrix") is as follows:
  • x, y, ⁇ x and ⁇ y are all positive integers, 1 ⁇ 2 ⁇ x +1 ⁇ m, 1 ⁇ 2 ⁇ y +1 ⁇ n, that is, the region of interest does not exceed the range of the entire backlight region, The subsequent steps will be further illustrated by taking this case as an example.
  • step S102 the backlight luminance for the region of interest is adjusted with the first precision, and the backlight luminance for the non-region of interest is adjusted with the second precision.
  • the current value of the backlight structure unit corresponding to the non-interest area is adjusted with a second precision in response to scanning the backlight structure unit corresponding to the non-interest area.
  • a plurality of backlight structural units corresponding to each of the attention area and the non-attention area may be scanned based on the flag bit, including:
  • the first flag bit is set to the first state; and in response to the first flag bit changing from the first state to the second state, sequentially traversing the backlight structure unit corresponding to the non-region of interest located before the region of interest Until the second flag is set to the first state.
  • the backlight structure unit corresponding to the non-attention region located behind the region of interest is sequentially traversed until the third flag is set to the first state.
  • controlling the first counter in response to the first flag changing from the first state to the second state, controlling the first counter to start counting until the first count value of the first counter reaches the first threshold, ending the counting, and setting the second flag bit to First state.
  • controlling the second counter in response to the second flag being in the first state, controlling the second counter to start counting until the second counter of the second counter reaches the second threshold, ending the counting, and changing the second flag from the first state to the second state .
  • the third counter in response to the first flag changing from the first state to the second state, the third counter is controlled to start counting until the third counter of the third counter reaches the third threshold, the control ends counting, and the third flag bit is skipped. Becomes the first state.
  • the brightness adjustment of the backlight region can be realized by adjusting the current value applied to the backlight structure unit, so that each backlight region can be performed in units of the backlight structure unit. More precise brightness control.
  • the register value Reg_extension of the backlight structure unit stored in the first cascade register may be adjusted, and the adjusted register value Reg_extension_Adjusted may be output.
  • the adjusted register value Reg_extension_Adjusted may be applied as a current value to the backlight structure unit.
  • the first cascade register can be formed in the following manner.
  • the first number of base registers are cascaded to form the first cascade register according to the preset maximum number of cascades of the base register, the bit width, and the variable corresponding to the first quantity. . ?
  • the default maximum number of cascades of the underlying registers can be defined as the variable Nreg, and the initial values of Nreg are set as follows:
  • Nreg m ⁇ n+ ⁇ 2 ⁇ [max( ⁇ x )]+1 ⁇ 2 ⁇ [max( ⁇ y )]+1 ⁇
  • ⁇ x and ⁇ y can be defined by the variable define and stored in the glbl.v file.
  • the define can be assigned according to the application scenario, image preprocessing, raw data (Raw Data) and other factors.
  • the default base bit width of the base register is defined as the variable Wreg and stored in the glbl.v file.
  • the value of Wreg can be 4, 8, 12 or 16 bits, and the specific setting value depends on the accuracy requirement in the actual adjustment.
  • the actual number of cascades of the underlying registers is defined as the variable k and stored in the glbl.v file, and the k-specific settings are based on the accuracy requirements in the actual adjustment.
  • the first precision is 2 (k ⁇ Wreg) .
  • the register value Reg_base of the backlight structure unit stored in the second cascade register is adjusted, and the adjusted register value Reg_base_Adjusted is output.
  • the adjusted register value Reg_base_Adjusted may be applied as a current value to a backlight structure unit corresponding to the non-interest area.
  • the second cascade register can be formed in the following manner.
  • the second number of base registers are cascaded into the second cascade registers according to the preset maximum number of cascades of the base registers, the bit widths, and the variables corresponding to the second number. .
  • the preset maximum number of cascades of the base registers is defined by the macro variable Nreg, and the initial value of Nreg is set according to the above formula (1).
  • ⁇ x and ⁇ y can be defined as variable definitions and stored in the glbl.v file.
  • the define can be assigned according to the application scenario, image preprocessing, raw data (Raw Data) and other factors.
  • the default base bit width of the base register can be defined as the variable Wreg and stored in the glbl.v file.
  • the value of Wreg can be 4, 8, 12 or 16.
  • the specific setting value depends on the accuracy requirement in the actual adjustment.
  • the second quantity may be 1, and the second precision may be 2 Wreg .
  • the embodiment of the present disclosure completes the parameter setting of the basic register based on the variable, and can satisfy different application scenarios by modifying the variable, without changing the underlying program, and without recompiling the code, thereby shortening the development cycle.
  • the first cascade register contains a greater number of base registers than the second cascade register contains, ie, the first number is greater than the second number.
  • the second number is 1, the variable k is greater than one.
  • the first precision 2 (k ⁇ Wreg) for the region of interest is much larger than the second precision 2 Wreg for the non-interest region, thereby improving the visual experience of the user in the region of interest.
  • the processing is performed on the non-interest area with lower precision without affecting the user's viewing, which helps to reduce power consumption.
  • the current values of the backlight structure units applied to different regions can be adjusted with different precision by outputting register values of different cascade registers. Adjustments of the different levels of accuracy described above can be implemented more simply with different cascaded registers. For example, the precision is improved by cascading or splicing of the basic registers, and the accuracy can be increased by 2 Wreg for each additional level of register.
  • a method of scanning a plurality of backlight structural units each corresponding to a region of interest and a non-interest region based on a flag bit according to an embodiment of the present disclosure will be described in detail.
  • the backlight area corresponding to the first matrix described above is taken as an example for description.
  • the method can include a pre-processing step and a scanning step.
  • the display area corresponding to the backlight partition of the (m 1 + m 2 ) line is taken as the attention area, and the (m 1 + m 2 +1) line in the first matrix is to the (m 1 + m 2 + m 3 )
  • the display area corresponding to the backlight partition of the line (ie, the mth line) serves as the second non-interest area (ie, the non-attention area located behind the attention area).
  • At least one counter is used for counting, by controlling the counter counting.
  • the value, and thus the state switching of the control flag bits can convert complex multiple sets of timing into combination logic (LUT) and timing resource (REG), further simplifying the process and reducing path delay while ensuring program convergence.
  • LUT combination logic
  • REG timing resource
  • At least one counter may adopt a forward increasing type counting (ie, a cumulative type counting), and may also adopt a reverse decreasing type counting manner, and when more than one counter is involved, different counters may be employed.
  • a forward increasing type counting ie, a cumulative type counting
  • a reverse decreasing type counting manner when more than one counter is involved, different counters may be employed.
  • the same counting method or different counting methods are used respectively.
  • the first counter, the second counter, and the third counter are employed to control the corresponding flag bit.
  • the first counter adopts a descending type counting manner, that is, every time the clock CLK (Clock) takes effect, cnt1 is decremented by one.
  • the second counter and the third counter adopt an incremental counting manner, that is, each time CLK is valid, both cnt2 and cnt3 are incremented by one. At the same time, each time CLK is validated, scanning of a backlight structure unit is completed.
  • the embodiment of the present disclosure sets a first flag bit Flag_start, a second flag bit Flag_ins, and a third flag bit Flag_end to control the direction and order of scanning.
  • Each of the three flag bits has two states, a first state and a second state, the first state can be represented by 1, and the second state can be represented by 0.
  • the first flag Flag_start is an enable signal for controlling the opening of the entire scan
  • the third flag Flag_end is an end signal for controlling the end of the entire scan
  • the second flag Flag_ins is an enable signal of the attention area, Control the scanning of the area of interest.
  • a method of scanning a plurality of backlight structural units of the attention area and the non-attention area based on the flag bit will be described below.
  • a method of performing scanning according to an embodiment of the present disclosure may include the following steps.
  • step S301 in response to the first flag bit Flag_start being in the first state, the effective time of the second flag bit Flag_ins is calculated according to the region radius of the region of interest, and the current value and register required for each backlight structure unit are calculated according to the requirements of the display image. Value; in response to the completion of the calculation, the first flag bit Flag_start is changed to the second state.
  • step S302 it is determined whether the first flag bit Flag_start is in the second state, and if so, step S303 is performed, and if no, step S301 is performed.
  • step S303 sequential traversal scanning is performed on a plurality of backlight structural units of the first non-interest area located before the attention area, and the first counter is controlled to start counting;
  • step S304 it is determined whether the first count value cnt1 of the first counter reaches the first threshold. If yes, step S305 is performed, and if no, step S303 is performed.
  • the absolute value of the difference between the initial value of cnt1 and the first threshold ie, the total count of the first counter
  • cnt1 reaches the first threshold, it indicates that the scanning of the first non-interest area is completed.
  • the first threshold can be set to zero.
  • step S305 the counting is ended, and the second flag bit Flag_ins is set to the first state, for example 0, to stop the current traversal scan.
  • the sequential traversal scanning of the plurality of backlight structural units in the region of interest is started, and the second counter is controlled to start counting.
  • step S306 it is determined whether the second count value cnt2 of the second counter reaches the second threshold. If yes, step S307 is performed, and if no, step S305 is performed.
  • the absolute value of the difference between the initial value of the count of cnt2 and the second threshold (that is, the total count of the second counter) is equal to the number of backlight structural units corresponding to the region of interest m 2 ⁇ n, and if the region of interest is the second matrix
  • the second threshold may be (2 ⁇ x +1) ⁇ (2 ⁇ y +1).
  • step S307 the second counter ends counting, and the second flag bit Flag_ins is changed from the first state to the second state, and the current traversal scan is stopped.
  • a sequential traversal scan is started on a plurality of backlight structural units in the second non-interest area located behind the region of interest, and the third counter is controlled to start counting.
  • step S308 it is determined whether the third count value cnt3 of the third counter reaches the third threshold. If yes, step S309 is performed, and if no, step S307 is performed.
  • the absolute value of the difference between the initial value of the count of cnt3 and the third threshold (that is, the total count of the third counter) is equal to the entire image region (including the first non-interest region, the region of interest, and the second non-region of interest).
  • the number of all backlight structural units, ie m ⁇ n is equal to the entire image region (including the first non-interest region, the region of interest, and the second non-region of interest).
  • the number of all backlight structural units, ie m ⁇ n When the third count value of the third counter reaches the third threshold, it indicates that the scanning of the second non-interest area is completed.
  • the third threshold can be set equal to m x n.
  • step S309 the third counter ends counting, sets the third flag Flag_end to the first state, and enters the frame buffer state.
  • Flag_end changes from the first state to the second state, ending the current traversal scan.
  • Each of the backlight structural units of each region in the embodiment of the present disclosure may be sequentially arranged regardless of visual pixel rows and columns. During the scanning process, it is not necessary to add the traditional line and frame flag bits, and only the transition of several flag bits can control the start and end of scanning for different areas, which can realize accurate and simple scanning control. In addition, parallel operation can be simplified to serial operation, simplifying timing.
  • the backlight adjustment method may further include: before step S101, determining whether a point of interest of the user on the display image is acquired; and in response to determining that the point of interest is not acquired, according to the preset on the display image
  • the position determination displays the region of interest and the non-interest region of the image, or uses the entire image as the region of interest.
  • the method of adjusting the attention area and the non-attention area determined by this method can be referred to the above example.
  • the preset position is a golden section of the displayed image.
  • the preset position can also be set to other positions according to actual needs.
  • the attention area and the non-attention area can be determined regardless of whether the point of interest is acquired, so that the backlight brightness adjustment of the entire backlight area can be continuously performed to avoid the interruption of the adjustment caused by the error of the tracking algorithm.
  • Embodiments of the present disclosure also provide a backlight adjustment device.
  • the backlight adjusting device may include a region determining unit 401 and a backlight adjusting unit 402.
  • the area determining unit 401 is configured to determine the attention area and the non-attention area of the image according to the point of interest of the user on the image.
  • the backlight adjustment unit 402 is configured to adjust the backlight brightness with the first precision for the attention area determined by the area determining unit, and adjust the backlight brightness with the second precision for the non-attention area determined by the area determining unit.
  • the area determining unit 401 is further configured to dynamically determine the above-mentioned point of interest by an eye tracking algorithm or a gaze point tracking algorithm.
  • the area determining unit 401 is further configured to: determine whether to acquire a point of interest of the user on the display image, and in response to determining that the point of interest is not acquired, determine the attention area and the non-attention area of the display image according to the preset position on the display image, Or use the entire image as the area of interest.
  • the backlight adjustment unit 402 can also be configured to scan a plurality of backlight structural units corresponding to each of the attention area and the non-attention area according to the set direction. For example, when the first flag bit changes from the first state to the second state, the plurality of backlight structure units in the non-attention area located before the attention area are sequentially traversed until the second flag is set to the first state.
  • the sequential traversal scan is performed on the plurality of backlight structure units in the region of interest until the second flag bit changes from the first state to the second state; when the second flag bit is from When the first state is changed to the second state, the plurality of backlight structure units located in the non-attention area behind the attention area are sequentially traversed until the third flag is set to the first state.
  • the backlight adjustment unit 402 can also be configured to adjust a current value applied to the plurality of backlight structural units corresponding to the attention area with a first precision when the scanning unit scans to the attention area.
  • the backlight adjustment unit 402 can also be configured to adjust the current value applied to the plurality of backlight structural units corresponding to the non-interest area with the second precision when the scanning unit scans to the non-interest area.
  • the backlight adjustment unit 402 can also be used to:
  • the third counter is controlled to start counting until the third count value reaches the third threshold, the control ends counting, and the third flag bit is set to the first state.
  • the backlight adjustment device provided by the embodiment of the present disclosure can refer to the backlight adjustment method.
  • the beneficial effects of the backlight adjustment device provided by the embodiment of the present disclosure are the same as those of the backlight adjustment method, and are not described herein again.
  • the embodiment of the present disclosure further provides a display device.
  • the schematic structure of the display device is as shown in FIG. 5 , and includes an electrically connected display device 510 , a backlight device 520 , and a backlight adjustment computing device 530 .
  • the display device 510 is configured to display an image;
  • the backlight device 520 is configured to provide a backlight source of the display device 510.
  • the backlight adjustment computing device 530 is configured to perform any of the backlight adjustment methods provided by embodiments of the present disclosure.
  • the backlight device 520 may include a plurality of backlight structure units, and at least a portion of the backlight structure unit is disposed at an edge region of the backlight device 520.
  • the edge region includes at least a backlight region corresponding to the first row, the first column, the mth row, and the nth column in the first matrix.
  • the contrast value of the edge region and other regions can be reduced by configuring the current value applied to the backlight structure unit in the edge region, and the upper layer SDK (Software Development Kit) can jointly optimize the anti-distortion. operating.
  • the display device is applied to a VR or AR system, it is also possible to reduce or even eliminate a problem area formed by lens enlargement caused by a conventional process error by adjusting a current value applied to the backlight structure unit in the edge region to improve the product. Yield.
  • the backlight adjustment computing device 530 can include at least one processor 531 and a memory 532, each of which is electrically coupled to the memory 532.
  • the memory 532 is configured to store at least one executable instruction
  • the at least one processor 531 is configured to execute the at least one executable instruction to perform a backlight adjustment method in accordance with an embodiment of the present disclosure.
  • the processor 531 may be a DSP (Digital Signal Processor), an FPGA (Field-Programmable Gate Array), or other devices with logic processing capability, such as an MCU (Microcontroller Unit). , CPU (Central Process Unit).
  • DSP Digital Signal Processor
  • FPGA Field-Programmable Gate Array
  • MCU Microcontroller Unit
  • CPU Central Process Unit
  • Embodiments of the present disclosure also provide a computer readable storage medium storing a computer program that, when executed, implements a backlight adjustment method in accordance with an embodiment of the present disclosure.
  • the computer readable storage medium includes but is not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM (Read-Only Memory), RAM ( Random Access Memory, EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), Flash Memory, Magnetic Card or light card. That is, a readable storage medium includes any medium that is stored or transmitted by a device (eg, a computer) in a readable form.
  • the brightness adjustment of the backlight area can cover the edge area of the backlight area, which can reduce the probability of distortion and improve product quality.
  • each block of the block diagrams and/or block diagrams and/or flow diagrams and combinations of blocks in the block diagrams and/or block diagrams and/or flow diagrams can be implemented by computer program instructions. .
  • these computer program instructions can be implemented by a general purpose computer, a professional computer, or a processor of other programmable data processing methods, such that the processor is executed by a computer or other programmable data processing method.
  • the disclosed block diagrams and/or block diagrams and/or schemes of the flow diagrams or blocks are specified in a plurality of blocks.

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Abstract

一种背光调节方法、背光调节装置、计算设备、显示设备和存储介质。背光调节方法包括：根据用户在显示图像上的关注点确定显示图像的关注区域及非关注区域（S101）；以第一精度调节关注区域的背光亮度进行第一精度的调节，以第二精度调节非关注区域的背光亮度（S102）。

Description

背光调节方法、背光调节装置、显示设备和存储介质
本申请要求于2018年4月20日提交的、申请号为201810362454.1的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域。具体地，本公开涉及一种背光调节方法、背光调节装置、显示设备和存储介质。
背景技术
背光亮度调节技术中，仅针对用户在显示的图像上的视觉关注区域对应的背光区域进行调节，而对非关注区域对应的背光区域较少进行调节。但是非关注区域的亮度特性会影响用户的观看体验。
发明内容
根据本公开实施例的一个方面，提供了一种背光调节方法，包括：
根据用户在显示图像上的关注点确定所述显示图像的关注区域及非关注区域；
以第一精度调节所述关注区域的背光亮度，以第二精度调节所述非关注区域的背光亮度。
例如，所述背光调节方法还包括：通过眼球跟踪算法或注视点跟踪算法动态地确定所述关注点。
例如，所述背光调节方法还包括：在所述根据用户在显示图像上的关注点确定所述显示图像的关注及非关注区域之前，
确定是否获取用户在显示图像上的关注点；响应于确定未获取所述关注点时，根据所述显示图像上的预设位置确定所述显示图像的关注区域及非关注区域，或将整个所述显示图像作为关注区域。
例如，所述以第一精度调节所述关注区域的背光亮度包括：
按照设定方向对所述关注区域对应的多个背光结构单元进行扫描；以及
以第一精度调节施加到所述关注区域对应的多个背光结构单元的电流值。
所述以第二精度调节所述非关注区域的背光亮度包括：
按照设定方向对所述非关注区域对应的多个背光结构单元进行扫描；
以第二精度调节施加到所述非关注区域对应的多个背光结构单元的电流值。
例如，所述以第一精度调节施加到所述关注区域对应的多个背光结构单元的电流值包括：针对所述关注区域对应的每个背光结构单元，调节存储在第一级联寄存器中的该背光结构单元的寄存器值，并输出调节后的该寄存器值。
例如，所述以第二精度调节所述非关注区域对应的多个背光结构单元的电流值包括：针对所述非关注区域对应的每个背光结构单元，调节存储输出在第二级联寄存器中的该背光结构单元的寄存器值，并输出调节后的该寄存器值。
其中，第一级联寄存器包含的基础寄存器的数量大于第二级联寄存器包含的基础寄存器的数量。
所述背光调节方法还包括：
所述基础寄存器的实际级联数量为第一数量，根据与所述基础寄存器的预设最大级联数量、位宽和实际级联数量对应的变量，将第一数量的基础寄存器级联成第一级联寄存器；
当所述基础寄存器的实际级联数量为第二数量时，根据预设的所述基础寄存器的最大级联数量、位宽和实际级联数量对应的宏变量，将第二数量的基础寄存器级联成第二级联寄存器。
所述背光调节方法还包括：响应于确定所述关注点，将第一标志位设置为第一状态；以及
响应于第一标志位从第一状态变为第二状态，对位于所述关注区域之前的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位跳变为第一状态；
响应于第二标志位设置为第一状态，对所述关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；
响应于第二标志位从第一状态变为第二状态，对位于所述关注区域之后的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第三标志位设置为第一状态。
所述背光调节方法还包括：
响应于第一标志位从第一状态变为第二状态，控制第一计数器开始计数，直到第一计数器的第一计数值达到第一阈值时结束计数，并将第二标志位设置为第一状 态；
响应于第二标志位设置为第一状态时，控制第二计数器开始计数，直到第二计数器的第二计数值达到第二阈值时结束计数，并将第二标志位从第一状态变为第二状态；以及
响应于第二标志位从第一状态变为第二状态，控制第三计数器开始计数，直到第三计数器的第三计数值达到第三阈值时结束计数，并将第三标志位设置为第一状态。
本公开的实施例根据另一个方面，还提供了一种背光调节装置，包括：
区域确定单元，用于根据用户在显示图像上的关注点确定所述显示图像的关注区域及非关注区域；
背光调节单元，用于以第一精度调节所述区域确定单元确定的关注区域的背光亮度，以第二精度调节所述区域确定单元确定的非关注区域的背光亮度。
例如，所述背光调节单元还用于：
按照设定方向对所述关注区域和所述非关注区域各自对应的多个背光结构单元进行扫描；
响应于扫描到所述关注区域，以第一精度调节施加到对所述关注区域对应的多个背光结构单元的电流值；
响应于扫描到所述非关注区域，以第二精度调节施加到对所述非关注区域对应的多个背光结构单元的电流值。
例如，所述背光调节单元还用于响应于第一标志位从第一状态变为第二状态，对位于所述关注区域之前的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位设置为第一状态；响应于第二标志位设置为第一状态时，对所述关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；响应于第二标志位从第一状态变为第二状态时，对位于所述关注区域之后的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第三标志位设置为第一状态。
根据本公开实施例的另一个方面，提供了一种背光调节设备，包括：
存储器，被配置用于存储计算机可执行指令；和至少一个处理器，被配置用来执行所述计算机可执行指令，从而执行本公开实施所述的任意一种背光调节方法的 步骤。
根据本公开实施例的又一个方面，提供了一种显示设备，包括电连接的显示装置、背光装置、以及本公开实施例所述的背光调节计算设备。
例如，所述背光装置包括多个背光结构单元，至少部分背光结构单元设置于所述背光装置的边缘区域。
根据本公开的实施例的再一个方面，提供了一种计算机可读存储介质，存储有计算机程序，该计算机程序被执行时实现本公开实施例所述的任意一种背光调节方法的步骤。
附图说明
本公开上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1为根据本公开实施例的背光调节方法的流程示意图；
图2为根据本公开实施例的背光调节方法中标志位跳变的波形示意图；
图3为根据本公开实施例的背光调节方法中对关注区域及非关注区域进行扫描的示例流程示意图；
图4为根据本公开实施例的背光调节装置的结构示意图；以及
图5为根据本公开实施例的显示设备的结构示意图。
具体实施方式
本公开的发明人经过研究发现，可以将整个背光区域划分为m×n(m和n均为正整数)个相互独立的背光分区，每个背光分区对应一个或数个LED(Light-Emitting Diode，发光二极管)。可以将每个背光分区作为最小调节单元(或称作最小背光结构单元)分别进行控制和调节。
假定Aij表示最小背光结构单元的亮度，其中i表示行数，1＜＜i＜＜m；j表示列数，1＜＜j＜＜n；Aij表示背光区域中第i行第j列的最小背光结构单元的亮度，Aij的值可根据用户对显示的图像亮度的实际需求进行调节。则整个背光区域可用如下的亮度矩阵(下称“第一矩阵”)来表示：
Figure PCTCN2018114553-appb-000001
其中，m＝m 1+m 2+m 3。
在一种显示图像背光处理中，只针对用户在显示图像中的视觉关注区域(人眼观测的核心区域)进行背光处理，并且该视觉关注区域通常是固定的。以上述亮度矩阵对应的图像为例，视觉关注区域可以为由第(m 1+1)行至第(m 1+m 2)行、第1列至第n列形成的矩形区域。因此，通常也针对该视觉关注区域进行调节。
在实际使用过程中，用户的视觉关注点是不断变化的，导致视觉关注区域动态变化。因此，需要针对变化的视觉关注区域执行背光处理。
此外，当显示设备应用于VR(Virtual Reality，虚拟现实)或AR(Augmented Reality，增强现实)系统中时，透镜的引入导致产生畸变现象。畸变现象在显示图像的边缘区域尤其严重，且随着透镜的放大倍数越大，导致的畸变现象越严重。
本公开实施例提出了一种背光调节方法、背光调节装置、显示设备和存储介质。根据本公开实施例，可实现对非关注区域的背光亮度调节并且实现对动态关注区域的更精细化调节，同时可减少畸变现象。
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通 过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能解释为对本公开的限制。
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本公开的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本公开所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与现有技术的上下文中的意义一致的意义，并且除非像这里一样被特定定义，否则不会用理想化或过于正式的含义来解释。
本公开实施例提供了一种背光调节方法。如图1所示，根据本公开实施例的背光调节方法可以包括以下步骤。
在S101，根据用户在图像上的关注点确定显示图像的关注区域及非关注区域。
例如，可以采用眼球跟踪(eye tracking)算法或注视点跟踪(gaze tracking)算法来动态地确定该关注点，并计算关注点坐标(x，y)。通过动态确定关注点，可使确定的关注点更加准确。
例如，根据确定的关注点的坐标(x，y)，以关注点坐标(x，y)为中心，进一步确定区域半径，进而得到由中心和区域半径形成的关注区域。关注区域之外的其它显示区域可以为非关注区域，关注区域和非关注区域均对应有多个背光结构单元。根据关注区域所处位置的不同，可以存在一个或更多个非关注区域。
例如，该区域半径在每个方向上的半径值均相同，从而形成的关注区域为以关注点坐标为圆心，以该相同的半径值为区域半径的圆形区域。
例如，该区域半径可以包括第一方向的第一距离值σ x和第二方向的第二距离值 σ y。以前述的整体背光区域的亮度矩阵为例，第一距离值σ x表示关注点坐标所在行与第一方向的区域边界所在行之间的距离，第二距离值σ y表示关注点坐标所在列与第二方向的区域边界所在列之间的距离。此时，形成的关注区域为以关注点坐标为区域中心，由第一方向的区域边界和第二方向的区域边界形成的矩形区域。其中，第一方向的区域边界可根据该区域中心和第一距离值σ x来确定，第二方向的区域边界可根据该区域中心和第二距离值σ y来确定。该矩形区域对应的亮度矩阵(下称“第二矩阵”)如下：
Figure PCTCN2018114553-appb-000002
其中，x、y、σ x和σ y均为正整数，1＜＜2σ x+1＜＜m，1＜＜2σ y+1＜＜n，即该关注区域不超过整体背光区域的范围，后续步骤将以此种情况为例作进一步说明。
接下来，在步骤S102，以第一精度调节针对关注区域的背光亮度，以第二精度调节针对非关注区域的背光亮度。
例如，按照设定方向对关注区域和非关注区域各自对应的多个背光结构单元进行扫描；响应于扫描关注区域对应的背光结构单元，以第一精度调节关注区域对应的背光结构单元的电流值。响应于扫描非关注区域对应的背光结构单元，以第二精度调节非关注区域对应的背光结构单元的电流值。
根据本公开实施例，可以基于标志位对关注区域和非关注区域各自对应的多个背光结构单元进行扫描，包括：
响应于确定关注点，第一标志位设置为第一状态；响应于第一标志位从第一状态变为第二状态，对位于关注区域之前的非关注区域对应的背光结构单元进行顺序遍历扫描，直到第二标志位被设置为第一状态。
响应于第二标志位为第一状态，对关注区域对应的背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；
响应于第二标志位从第一状态变为第二状态，对位于关注区域之后的非关注区域对应的背光结构单元进行顺序遍历扫描，直到第三标志位设置为第一状态。
例如，响应于第一标志位从第一状态变为第二状态，控制第一计数器开始计数，直到第一计数器的第一计数值达到第一阈值时结束计数，并将第二标志位设置为第一状态。响应于第二标志位为第一状态，控制第二计数器开始计数，直到第二计数器的第二计数值达到第二阈值时结束计数，并使第二标志位从第一状态变为第二状态。此外，响应于第一标志位从第一状态变为第二状态，控制第三计数器开始计数，直到第三计数器的第三计数值达到第三阈值时控制结束计数，并将第三标志位跳变为第一状态。
例如，当每扫描到一个背光区域的背光结构单元时，可以通过调节施加到该背光结构单元的电流值来实现对该背光区域的亮度调节，从而能够以背光结构单元为单位对各背光区域进行更加精确的亮度控制。
例如，响应于扫描关注区域对应的每个背光结构单元，可以调节存储在第一级联寄存器中的该背光结构单元的寄存器值Reg_extension，并输出调节后的寄存器值Reg_extension_Adjusted。根据本公开实施例，可以将调节后的寄存器值Reg_extension_Adjusted作为电流值施加到该背光结构单元。
例如，根据本公开实施例，可通过以下方式形成第一级联寄存器。当基础寄存器的实际级联数量为第一数量时，根据基础寄存器的预设最大级联数量、位宽和第一数量对应的变量，将第一数量的基础寄存器级联形成第一级联寄存器。？
例如，基础寄存器的预设最大级联数量可以定义为变量Nreg，并设置Nreg的初始值如下：
Nreg＝m×n+{2×[max(σ x)]+1}×{2×[max(σ y)]+1}
(1)
以上公式(1)中，σ x和σ y可由变量define来定义，并存入glbl.v文件中。可以根据应用场景、图像预处理、原始数据(Raw Data)等因素对define进行赋值。
例如，基础寄存器的预设基础位宽定义为变量Wreg，并存入glbl.v文件中。Wreg的值可以是4、8、12或16比特，具体设置值根据实际调节中的精度需求而定。
例如，基础寄存器的实际级联数量定义为变量k，并存入glbl.v文件中，k具体 设置值根据实际调节中的精度需求而定。
本公开实施例中，所述第一精度为2 (k×Wreg)。
例如，响应于扫描非关注区域对应的背光结构单元，调节存储在第二级联寄存器中的该背光结构单元的寄存器值Reg_base，并输出调节后的寄存器值Reg_base_Adjusted。根据本公开实施例，可以将调节后的寄存器值Reg_base_Adjusted作为电流值施加到该非关注区域对应的背光结构单元。
例如，根据本公开实施例，可通过以下方式形成第二级联寄存器。当基础寄存器的实际级联数量为第二数量时，根据基础寄存器的预设最大级联数量、位宽和第二数量对应的变量，将第二数量的基础寄存器级联成第二级联寄存器。
例如，基础寄存器的预设最大级联数量采用宏变量Nreg来定义，并根据上述公式(1)设置Nreg的初始值。
公式(1)中，σ x和σ y可定义为变量define，并存入glbl.v文件中。可以根据应用场景、图像预处理、原始数据(Raw Data)等因素对define进行赋值。
基础寄存器的预设基础位宽可以定义为变量Wreg，并存入glbl.v文件中，Wreg的值可以是4、8、12或16，具体设置值根据实际调节中的精度需求而定。
本公开实施例中，第二数量可以为1，此时第二精度可以为2 Wreg。
本公开实施例基于变量完成基础寄存器的参数设置，通过修改变量即可满足不同的应用场景，不需更改底层程序，无需重新编译代码，从而缩短开发周期。
例如，第一级联寄存器包含的基础寄存器的数量大于第二级联寄存器包含的基础寄存器的数量，即第一数量大于第二数量。当第二数量为1时，变量k大于1。
因此，经过运算后，针对关注区域的第一精度2 (k×Wreg)远大于针对非关注区域的第二精度2 Wreg，从而提升了用户在关注区域的视觉体验。同时在不影响用户观看的情况下，以较低精度针对非关注区域执行处理，有助于降低功耗。
此外，根据本公开实施例，在背光调节处理中，通过输出不同的级联寄存器的寄存器值，可对施加到不同区域的背光结构单元的电流值进行不同精度的调节。利用不同的级联寄存器可以更简单地实现上述不同精度等级的调节。例如，通过基础寄存器的级联或拼接实现精度提高，每增加一级寄存器，精度可提升2 Wreg。
接下来将详细描述根据本公开实施例基于标志位对关注区域和非关注区域各 自对应的多个背光结构单元进行扫描的方法。以下示例中，以上述第一矩阵对应的背光区域为例进行描述。该方法可以包括预处理步骤和扫描步骤。
首先，描述扫描前的预处理步骤。
将第一矩阵中第1行至第m 1行的背光分区对应的显示区域作为第一非关注区域(即位于关注区域之前的非关注区域)，将第一矩阵中第(m 1+1)行至第(m 1+m 2)行的背光分区对应的显示区域作为关注区域，将第一矩阵中第(m 1+m 2+1)行至第(m 1+m 2+m 3)行(即第m行)的背光分区对应的显示区域作为第二非关注区域(即位于关注区域之后的非关注区域)。
例如，在对整个背光区域进行扫描的过程中，取代传统的V-SYNC(vertical synchronization，垂直同步)和H-SYNC(horizonal synchronization，水平同步)，采用至少一个计数器进行计数，通过控制计数器的计数值，进而控制标志位的状态切换，可以将复杂的多组时序转换为组合逻辑(LUT)和时序资源(REG)结合，在保证程序收敛的基础上，进一步简化了流程，同时减少路径延时，降低算法复杂度，降低功耗和散热压力，并为函数调用和后续算法的添加预留了时序余量，易于进行程序维护。
根据本公开实施例，至少一个计数器可采用正向递增型计数(即，累积型计数)的方式，也可采用反向递减型计数的方式，且涉及一个以上的计数器时，不同的计数器可采用同一种计数方式或分别采用不同的计数方式。
例如，采用第一计数器、第二计数器和第三计数器来控制相应的标志位。第一计数器的第一计数值、第二计数器的第二计数值和第三计数器的第三计数值可以分别用计数变量cnt1、cnt2和cnt3来表示，其初始值分别设置如下：将cnt1的初始值设置为第一非关注区域中背光结构单元的数量，即cnt1的初始值＝m 1×n；cnt2和cnt3的初始值均设置为0。第一计数器采用递减型计数的方式，即时钟CLK(Clock)每生效一次，cnt1减1。第二计数器和第三计数器采用递增型计数的方式，即CLK每生效一次，cnt2和cnt3均加1。同时CLK每生效一次，完成对一个背光结构单元的扫描。
参照图2，本公开实施例设置了第一标志位Flag_start、第二标志位Flag_ins和第三标志位Flag_end来控制扫描的方向和顺序。三个标志位均具有两个状态，分别为第一状态和第二状态，第一状态可用1来表示，第二状态可用0来表示。其中， 第一标志位Flag_start为开启信号，用于控制整个扫描的开启，第三标志位Flag_end为结束信号，用于控制整个扫描的结束；第二标志位Flag_ins为关注区域的使能信号，用于控制对关注区域的扫描。
根据本公开实施例，将设置第一标志位Flag_start的初始状态为第二状态，响应于确定关注点，发出触发信号，将第一标志位Flag_start设置为第一状态，即Flag_start＝1，此后开始扫描过程。
下面介绍基于标志位对关注区域和非关注区域各自的多个背光结构单元进行扫描的方法。如图3所示，根据本公开实施例进行扫描的方法可以包括下述步骤。
在步骤S301，响应于第一标志位Flag_start处于第一状态，根据关注区域的区域半径计算第二标志位Flag_ins的有效时间，并根据显示图像的要求计算各个背光结构单元所需的电流值和寄存器值；响应于计算完成，将第一标志位Flag_start变为第二状态。
在步骤S302，确定第一标志位Flag_start是否为第二状态，若是，则执行步骤S303，若否，则执行步骤S301。
在步骤S303，对位于关注区域之前的第一非关注区域的多个背光结构单元进行顺序遍历扫描，并控制第一计数器开始计数；
在步骤S304，确定第一计数器的第一计数值cnt1是否达到第一阈值，若是，则执行步骤S305，若否，则执行步骤S303。cnt1的初始值与第一阈值的差值的绝对值(即第一计数器的计数总量)等于第一非关注区域对应的背光结构单元的数量m 1×n。当cnt1达到第一阈值时，表示对第一非关注区域的扫描全部完成。例如，可以将第一阈值设置为0。
在步骤S305，结束计数，将第二标志位Flag_ins设置为第一状态，例如0，停止当前的遍历扫描。开始对关注区域中的多个背光结构单元进行顺序遍历扫描，并控制第二计数器开始计数。
在步骤S306，确定第二计数器的第二计数值cnt2是否达到第二阈值，若是，则执行步骤S307，若否，则执行步骤S305。其中，cnt2的计数初始值与第二阈值的差值的绝对值(即第二计数器的计数总量)等于关注区域对应的背光结构单元的数量m 2×n，若关注区域为第二矩阵对应的背光区域，则该第二阈值可以为(2σ x+1)×(2σ y+1)。当cnt2达到第二阈值时，表示对关注区域的扫描全部完成。
在步骤S307，第二计数器结束计数，将第二标志位Flag_ins由第一状态变为第二状态，停止当前的遍历扫描。开始对位于关注区域之后的第二非关注区域中的多个背光结构单元进行顺序遍历扫描，并控制第三计数器开始计数。
在步骤S308，确定第三计数器的第三计数值cnt3是否达到第三阈值，若是，则执行步骤S309，若否，则执行步骤S307。其中，cnt3的计数初始值与第三阈值的差值的绝对值(即第三计数器的计数总量)等于整个图像区域(包括上述第一非关注区域、关注区域及第二非关注区域)对应的全部背光结构单元的数量，即m×n。当第三计数器的第三计数值达到第三阈值时，表示对第二非关注区域的扫描全部完成。例如，可以将第三阈值设置为等于m×n。
在步骤S309，第三计数器结束计数，将第三标志位Flag_end设置为第一状态，并进入帧缓冲状态。当接收到缓冲结束信号时，Flag_end由第一状态变为第二状态，结束当前的遍历扫描。
本公开实施例中各区域的各背光结构单元可以是顺序排列的，与视觉上的像素行和列无关。在扫描过程中，无需添加传统的行、帧标志位，仅通过几个标志位的跳变，就可以控制对不同区域的扫描的开始和结束，可实现精确且更简便的扫描控制。此外可将并行操作简化为串行操作，简化时序。
根据本公开实施例的背光调节方法，还可以包括：在步骤S101之前，确定是否获取到用户在显示图像上的关注点；响应于确定未获取到所述关注点，根据显示图像上的预设位置确定显示图像的关注区域及非关注区域，或将整个图像作为关注区域。对通过该方式确定的关注区域及非关注区域进行调节的方法可参照上述示例。
根据本公开实施例中，该预设位置为显示图像的黄金分割点。根据实际需求，也可以将预设位置设置于其它位置。
根据本公开实施例，无论是否获取关注点，均可确定关注区域及非关注区域，可使得对整体背光区域的背光亮度调节可以连续进行，避免因跟踪算法出现错误引起的调节的中断。
本公开实施例还提供了一种背光调节装置。如图4所示，该背光调节装置可以包括区域确定单元401和背光调节单元402。
区域确定单元401用于根据用户在图像上的关注点确定图像的关注区域及非关注区域。
背光调节单元402，用于针对区域确定单元确定的关注区域，以第一精度调节背光亮度，针对区域确定单元确定的非关注区域，以第二精度调节背光亮度。
区域确定单元401还用于通过眼球跟踪算法或注视点跟踪算法动态地确定上述关注点。
区域确定单元401还可用于：确定是否获取用户在显示图像上的关注点，响应于确定未获取到该关注点时，根据显示图像上的预设位置确定显示图像的关注区域及非关注区域，或将整个图像作为关注区域。
背光调节单元402还可以用于按照设定方向对关注区域和非关注区域各自对应的多个背光结构单元进行扫描。例如，当第一标志位从第一状态变为第二状态时，对位于关注区域之前的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位被设置为第一状态；当第二标志位被设置为第一状态时，对关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；当第二标志位从第一状态变为第二状态时，对位于关注区域之后的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第三标志位被设置为第一状态。
背光调节单元402还可以用于当扫描单元扫描到关注区域时，以第一精度调节施加到关注区域对应的多个背光结构单元的电流值。
背光调节单元402还可以用于当扫描单元扫描到非关注区域时，以第二精度调节施加到非关注区域对应的多个背光结构单元的电流值。
背光调节单元402还可以用于：
当第一标志位从第一状态变为第二状态时，控制第一计数器开始计数，直到第一计数值达到第一阈值时控制结束计数，并将第二标志位设置为第一状态；
当第二标志位设置为第一状态时，控制第二计数器开始计数，直到第二计数值达到第二阈值时控制结束计数，并将第二标志位从第一状态变为第二状态；
当第一标志位从第一状态变为第二状态时，控制第三计数器开始计数，直到第三计数值达到第三阈值时控制结束计数，并将第三标志位设置为第一状态。
本公开实施例提供的背光调节装置中未详述的内容，可参照上述背光调节方法，本公开实施例提供的背光调节装置能够达到的有益效果与上述背光调节方法相同， 在此不再赘述。
本公开实施例还提供了一种显示设备，该显示设备的结构示意图如图5所示，包括电连接的显示装置510、背光装置520、以及背光调节计算设备530。其中，显示装置510配置为显示图像；背光装置520配置为提供显示装置510的背光光源。背光调节计算设备530配置为执行本公开实施例提供的任意一种背光调节方法。
背光装置520可以包括多个背光结构单元，至少部分背光结构单元设置于背光装置520的边缘区域。该边缘区域至少包括第一矩阵中第一行、第一列、第m行和第n列对应的背光区域。
当边缘区域产生畸变效应时，通过配置施加到边缘区域内背光结构单元的电流值，可降低边缘区域与其它区域的对比度，配合上层SDK(Software Development Kit，软件开发工具包)可共同优化反畸变操作。当显示设备应用于VR或AR系统中时，还可通过调节施加到边缘区域内背光结构单元的电流值，减小甚至消除由常规工艺误差引起的透镜放大后形成的问题区域，以提高产品的成品率。
本公开实施例中配置边缘区域内背光结构单元的电流值的方法，可参照上述背光调节方法。
背光调节计算设备530可以包括至少一个处理器531和存储器532，至少一个处理器531均与存储器532电连接。存储器532被配置为存储有至少一个可执行指令，至少一个处理器531被配置为执行该至少一个可执行指令，从而执行根据本公开实施例的背光调节方法。
处理器531可以是DSP(Digital Signal Processor，数字信号处理器)、FPGA(Field-Programmable Gate Array，现场可编程门阵列)或者其它具有逻辑处理能力的器件，如MCU(Microcontroller Unit，微控制单元)、CPU(Central Process Unit，中央处理器)。
本公开实施例还提供了一种计算机可读存储介质，存储有计算机程序，该计算机程序被执行时实现根据本公开实施例的背光调节方法。
本公开实施例提供的计算机可读存储介质包括但不限于任何类型的盘(包括软盘、硬盘、光盘、CD-ROM、和磁光盘)、ROM(Read-Only Memory，只读存储器)、 RAM(Random Access Memory，随即存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦可编程只读存储器)、闪存、磁性卡片或光线卡片。也就是，可读存储介质包括由设备(例如，计算机)以能够读的形式存储或传输信息的任何介质。
根据本公开实施例的技术方案，至少具有如下有益效果：
1)根据用户在图像上的实际关注点确定用户的实际关注区域，而不仅针对固定关注区域，更符合实际应用中用户的关注情况，提升了用户的视觉体验；
2)以不同的精度调节施加到关注区域和非关注区域的背光结构单元的电流值，使得关注区域的图像对比度保持较大，图像画面的亮度呈现更加细腻、生动；同时使得非关注区域的图像对比度保持较小，减少相关参数的计算量和控制量，简化控制过程，在满足用户需求的情况下降低控制所需的功耗；
3)通过不同数目基础寄存器的级联，可更简便地调节精度等级，实现背光的精度管理，且可兼容多种背光结构；
4)采用变量来管理代码，针对不同的应用场景，仅需修改变量即可，无需修改底层程序，大大缩短了开发周期；
5)采用标志位和计数变量控制扫描过程，可简化操作，减少路径延时，降低算法复杂度，保证低功耗散热，也为函数调用和新算法的添加预留了时序余量，易于进行程序维护；
6)对背光区域的亮度调节可覆盖至背光区域的边缘区域，能够降低出现畸变的概率，提高产品质量。
本技术领域技术人员可以理解，可以用计算机程序指令来实现这些结构图和/或框图和/或流图中的每个框以及这些结构图和/或框图和/或流图中的框的组合。本技术领域技术人员可以理解，可以将这些计算机程序指令提供给通用计算机、专业计算机或其他可编程数据处理方法的处理器来实现，从而通过计算机或其他可编程数据处理方法的处理器来执行本公开公开的结构图和/或框图和/或流图的框或多个框中指定的方案。
本技术领域技术人员可以理解，本公开中已经讨论过的各种操作、方法、流程中的步骤、措施、方案可以被交替、更改、组合或删除。进一步地，具有本公开中已经讨论过的各种操作、方法、流程中的其他步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。进一步地，现有技术中的具有与本公开中公开的各种操作、方法、流程中的步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。
以上所述仅是本公开的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (15)

  1. 一种背光调节方法，包括：
    根据用户在显示图像上的关注点确定所述显示图像的关注区域及非关注区域；
    以第一精度调节所述关注区域的背光亮度；以及
    以第二精度调节所述非关注区域的背光亮度。
  2. 根据权利要求1所述的方法，还包括：通过眼球跟踪算法或注视点跟踪算法动态地确定所述关注点。
  3. 根据权利要求1所述的方法，还包括：在所述根据用户在显示图像上的关注点确定所述显示图像的关注及非关注区域之前，
    确定是否获取用户在显示图像上的关注点；响应于确定未获取所述关注点时，根据所述显示图像上的预设位置确定所述显示图像的关注区域及非关注区域，或将整个所述显示图像作为关注区域。
  4. 根据权利要求2或3所述的方法，其中，所述以第一精度调节所述关注区域的背光亮度包括：
    按照设定方向对所述关注区域对应的多个背光结构单元进行扫描；
    以第一精度调节施加到所述关注区域对应的多个背光结构单元的电流值。
    所述以第二精度调节所述非关注区域的背光亮度包括：
    按照设定方向对所述非关注区域对应的多个背光结构单元进行扫描；以及
    以第二精度调节施加到所述非关注区域对应的多个背光结构单元的电流值。
  5. 根据权利要求4所述的方法，其中，所述以第一精度调节施加到所述关注区域对应的多个背光结构单元的电流值包括：对所述关注区域对应的每个背光结构单元，调节对应存储在第一级联寄存器中的该背光结构单元的寄存器值，并输出调节后的该寄存值；
    其中，所述第二精度调节施加到所述非关注区域对应的多个背光结构单元的电流值包括：针对所述非关注区域对应的每个背光结构单元，调节存储输出在第二级联寄存器中的该背光结构单元的寄存器值，并输出调节后的该寄存器值；
    其中，第一级联寄存器包含的基础寄存器的数量大于第二级联寄存器包含的基础寄存器的数量。
  6. 根据权利要求5所述的方法，还包括：
    响应于所述基础寄存器的实际级联数量为第一数量，根据与所述基础寄存器的预设最大级联数量、位宽和实际级联数量对应的变量，将第一数量的基础寄存器级联成第一级联寄存器；以及
    响应于所述基础寄存器的实际级联数量为第二数量，根据与所述基础寄存器的预设最大级联数量、位宽和实际级联数量对应的宏变量，将第二数量的基础寄存器级联成第二级联寄存器。
  7. 根据权利要求1所述的方法，还包括：响应于确定所述关注点，将第一标志位设置为第一状态；以及
    响应于第一标志位从第一状态变为第二状态，对位于所述关注区域之前的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位设置为第一状态；
    响应于第二标志位设置为第一状态，对所述关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；以及
    响应于第二标志位从第一状态变为第二状态，对位于所述关注区域之后的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第三标志位设置为第一状态。
  8. 根据权利要求7所述的方法，还包括：
    响应于第一标志位从第一状态变为第二状态，控制第一计数器开始计数，直到第一计数器的第一计数值达到第一阈值时结束计数，并将第二标志位设置为第一状态；
    响应于第二标志位设置为第一状态，控制第二计数器开始计数，直到第二计数器的第二计数值达到第二阈值时结束计数，并将第二标志位从第一状态变为第二状态；
    响应于第二标志位从第一状态变为第二状态，控制第三计数器开始计数，直到达到第三阈值时控制结束计数，并将第三标志位跳变为第一状态。
  9. 一种背光调节装置，包括：
    区域确定单元，用于根据用户在显示图像上的关注点确定所述图像的关注区域及非关注区域；以及
    背光调节单元，用于以第一精度调节所述区域确定单元确定的关注区域的背光亮度，以第二精度调节所述区域确定单元确定的非关注区域的背光亮度。
  10. 根据权利要求9所述的装置，其中，所述背光调节单元还用于：
    按照设定方向对所述关注区域和所述非关注区域各自对应的多个背光结构单元进行扫描；
    响应于所述扫描单元扫描到所述关注区域，以第一精度调节施加到所述关注区域对应的多个背光结构单元的电流值；以及
    响应于所述扫描单元扫描到所述非关注区域，以第二精度调节所述非关注区域对应的多个背光结构单元的电流值。
  11. 根据权利要求10所述的装置，其中，所述背光调节单元还用于
    响应于第一标志位从第一状态变为第二状态，对位于所述关注区域之前的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位设置为第一状态；
    响应于第二标志位设置为第一状态，对所述关注区域中的多个背光结构单元进行顺序遍历扫描，直到第二标志位从第一状态变为第二状态；以及
    响应于第二标志位从第一状态变为第二状态，对位于所述关注区域之后的非关注区域中的多个背光结构单元进行顺序遍历扫描，直到第三标志位设置为第一状态。
  12. 一种背光调节计算设备，包括：
    存储器，被配置用于存储计算机可执行指令；和
    至少一个处理器，被配置用来执行所述计算机可执行指令，从而执行如权利要求1-8中任一项所述的背光调节方法的步骤。
  13. 一种显示设备，包括电连接的显示装置、背光装置、以及如权利要求12所述的背光调节计算设备。
  14. 根据权利要求13所述的设备，其中，所述背光装置包括多个背光结构单元，至少部分背光结构单元设置于所述背光装置的边缘区域。
  15. 一种计算机可读存储介质，存储有计算机程序，该计算机程序被执行时实 现如权利要求1-8中任一项所述的背光调节方法的步骤。
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