WO2013143277A1 - 区域调光显示图像的方法、装置及系统 - Google Patents

区域调光显示图像的方法、装置及系统 Download PDF

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Publication number
WO2013143277A1
WO2013143277A1 PCT/CN2012/083329 CN2012083329W WO2013143277A1 WO 2013143277 A1 WO2013143277 A1 WO 2013143277A1 CN 2012083329 W CN2012083329 W CN 2012083329W WO 2013143277 A1 WO2013143277 A1 WO 2013143277A1
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Prior art keywords
image
bright
area
region
black
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PCT/CN2012/083329
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English (en)
French (fr)
Inventor
周珊珊
田正牧
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京东方科技集团股份有限公司
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Publication of WO2013143277A1 publication Critical patent/WO2013143277A1/zh

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Classifications

    • 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
    • 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
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • 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
    • G09G2320/0238—Improving the black level
    • 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
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • 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

Definitions

  • Embodiments of the present invention provide a method, apparatus, and system for area dimming display images. Background technique
  • Liquid crystal displays have the advantages of light weight, low radiation, and portability, and are therefore widely used as displays for terminals such as televisions and computers.
  • This area dimming technique first divides the image into a plurality of image units in a matrix, then calculates the average brightness of each image unit in the displayed image, independently controls the brightness of each image unit, and improves the contrast of the image.
  • the liquid crystal display using the area dimming technology displays an image
  • the brightness of an image unit in the image is high, and the rest is a non-light area, and the backlight does not output light to the non-light area
  • the bright area is The difference in brightness between the non-bright areas and the non-bright areas is relatively large, causing the image elements in the bright areas to leak light into the non-bright areas, which reduces the contrast of the image and reduces the display quality of the image.
  • Embodiments of the present invention provide a method, apparatus, and system for area dimming display images, which are used to solve the problem that a liquid crystal display of a regional dimming in the prior art is prone to light leakage and poor image quality when displaying an image.
  • An aspect of the present invention provides a method for area dimming display image, comprising: receiving an image signal of a frame image; parsing the image signal, and acquiring a backlight control signal corresponding to a bright region and a black insertion region of the image; Controlling, by the backlight control signal, the backlight to output bright light to the bright region and black insertion of the black insertion region to display the image.
  • the controlling the backlight to output bright light to the bright region and the black insertion of the black insertion region according to the backlight control signal include: displaying a frame period of one frame Before the first preset time, the bright area remains black; after the first preset time, the backlight outputs bright light to the bright area.
  • the black insertion area remains in a black insertion state.
  • the controlling the backlight to output bright light to the bright region and the black insertion of the black insertion region according to the backlight control signal include: displaying a second pre-in a frame period of one frame When the time is set, the image signal of the next frame image is received.
  • the black insertion area includes: an image unit that is connected to the bright light area.
  • Another aspect of the present invention provides an apparatus for area dimming display image, comprising: a receiving module, configured to receive an image signal of a frame image; a parsing module, configured to parse the image signal, and obtain the image And a backlight control signal corresponding to the black area; the control module is configured to control the backlight to output bright light to the bright area according to the backlight control signal, and insert black to the black insertion area to display Said image.
  • control module is further configured to: before the displaying the first preset time in a frame period of the image, control the bright region to remain black-plugged; after the first preset time, the control device The backlight outputs bright light to the bright region.
  • control module is further configured to: control the black insertion area to remain in a black insertion state during a period in which one frame of image is displayed.
  • the receiving module is further configured to: receive an image signal of an image of a next frame when displaying a second preset time in a frame period of one frame.
  • Still another aspect of the present invention provides a system for area dimming display image, comprising any of the above-described areas for dimming display images.
  • the method for displaying an image by region dimming according to an embodiment of the present invention, by acquiring a bright region of an image and a black insertion region around the bright region, outputting a bright light to a bright region of the image, and inserting a black area around the bright region. Avoid light leakage to the surrounding non-light areas, reduce or eliminate the smear phenomenon when displaying images, increase the sharpness of the image, and improve the display quality of the image.
  • DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .
  • FIG. 1 is a flow chart of a first embodiment of a method for spatially dimming an image display according to the present invention
  • FIG. 2 is a schematic structural view of a second embodiment of a method for spatially dimming an image display according to the present invention
  • FIG. 3 is a view showing a distribution of a bright region and a black insertion region of an image in a second embodiment of the method for dimming and displaying an image according to the present invention
  • FIG. 4 is a timing diagram of a method for spatially dimming an image in a second embodiment of a method for spatially dimming an image display according to the present invention
  • FIG. 5 is a schematic structural diagram of an apparatus for displaying a region dimming display image according to the present invention. detailed description
  • FIG. 1 is a flow chart of a first embodiment of a method for spatially dimming an image display according to the present invention. As shown in FIG. 1, the flow of the method for area dimming display image in this embodiment includes the following steps.
  • Step 101 Receive an image signal of one frame of image.
  • a liquid crystal display using a regional dimming technology is taken as an example to introduce a technical solution.
  • the display area of the screen of the liquid crystal display is divided into one image unit in a matrix form.
  • a flat display area of a 70 inch liquid crystal display can be divided into 16 x 12 image units.
  • Step 102 Analyze the image signal, and obtain a backlight control signal corresponding to the bright region and the black insertion region of the image.
  • the image signal is analyzed to obtain information such as image brightness, image color, and the like in the received image signal. Then, based on the matrix area divided into two image units in the display area, the bright area and the black insertion area of the image are obtained, and the bright image unit where the bright area is located and the black insertion image unit where the black insertion area is located are obtained.
  • the average brightness of an image unit is higher than a certain preset threshold, it is defined as a bright image unit; if the average brightness of one image unit is lower than the threshold or lower than another smaller preset For a value of B, it is defined as a black image unit.
  • the preset threshold A is, for example, 80% of the highest display brightness value; and the threshold B is, for example, 20% of the highest display brightness value.
  • One or more bright image units adjacent to each other constitute a bright area, and one or more black-out image units adjacent to each other constitute a black insertion area.
  • the image to be displayed may include one or more bright areas, or one or more black areas.
  • all the image units in the non-light area may be blackened, or the image unit adjacent to the bright area in the non-light area may be blackened to prevent the bright area from leaking light to the surrounding area.
  • the black insertion area is described by taking, for example, an image unit adjacent to the bright area as an example.
  • the backlight control signal of the backlight when the image is displayed is calculated, and then proceeds to step 103.
  • Step 103 Control the backlight to output bright light to the bright area according to the backlight control signal, and insert black to the black insertion area to display an image at the same time.
  • the display used in this embodiment is a liquid crystal display including a liquid crystal panel and a backlight.
  • the backlight is disposed on the back (or rear side) of the liquid crystal panel to provide the liquid crystal panel with light required for display.
  • the backlight is, for example, a direct type backlight, and includes a plurality of light emitting units (light sources) arranged side by side with each other. Corresponds to the display area of the screen of the liquid crystal panel. These light emitting units are, for example, cold cathode fluorescent lamps
  • CCFL CCFL
  • LED light emitting diode
  • These light sources can be independently controlled, such as turning on or off, or modulating the intensity of illumination, or can be controlled based on region division.
  • the switching state of each of the light-emitting units in the backlight and the brightness thereof are controlled according to the backlight control signal, and the bright light region of the image is outputted, and the black-out image unit where the black-black region is located is blackened, for example, Inserting the light-emitting units in the backlight corresponding to the black areas or reducing the brightness of the light-emitting units; when the backlight reduces the brightness in the black-encapsulated area, for example, the brightness may be made less than 50% of the maximum brightness, for example, 20%. This can avoid image quality degradation due to light leakage of the bright light image unit to the image unit in the non-light area of the periphery, thereby increasing the sharpness and contrast of the image and improving the quality of the image.
  • the bright region of the image and the black insertion region around the bright region are first acquired, and then, when the image is displayed, the backlight is controlled to output bright light to the bright region of the image, and the black insertion region around the bright region is blackened. Therefore, the light-emitting area is prevented from leaking light to the non-light-emitting area of the periphery, and the smear phenomenon which occurs when the image is displayed is reduced or eliminated, the sharpness of the image is increased, and the display quality of the image is improved.
  • FIG. 2 is a schematic structural view of a second embodiment of a method for spatially dimming an image display according to the present invention
  • FIG. 3 is a distribution diagram of a bright region and a black insertion region of an image in a second embodiment of the method for dimming and displaying an image according to the present invention
  • Step 201 Receive an image signal of one frame of image.
  • the liquid crystal display using the area dimming technology is taken as an example to introduce the technical solution.
  • the display frequency of the image is 60 frames/second, and the display period T of each frame image is l/60s, which is about 16 ms.
  • the image signal of the frame image to be displayed is first received, and the image signal includes information such as brightness, color, and the like of each pixel of the image, and then proceeds to step 202.
  • Step 202 Analyze the image signal, and obtain a backlight control signal corresponding to the bright region and the black insertion region of the image.
  • the image signal is parsed to obtain a bright area and a black insertion area of the image.
  • the bright image unit and the black image unit are determined in a similar manner to the above step 102, thereby obtaining a bright area and a black insertion area.
  • the black image where the black area is inserted The unit 301 is distributed around the bright image unit 302 where the bright area is located, and the remaining area 303 is not specifically defined.
  • the backlight control signal of the backlight when the image is displayed is calculated, and then proceeds to step 203.
  • Step 203 The period of displaying the image of one frame, before the first preset time, the bright area and the black insertion area are kept black.
  • the black insertion area remains in the black insertion state, and before the first preset time t1 in the period T of displaying one frame image, the bright area is Also, the black insertion state is maintained, for example, the illumination unit corresponding to the black insertion area and the bright area of the backlight is controlled to be turned off or the brightness is lowered; when the backlight reduces the brightness in the black insertion area, for example, the brightness can be made. Less than 50% of the maximum brightness, for example 20%.
  • the process proceeds to step 204.
  • the period T of displaying one frame of image is 16 ms
  • the first preset time t1 can be set, for example, to 1/180 s, and tl is about 5.6 ms; in the first 5.6 ms of displaying a frame period of 16 ms, the light is bright. The area also remains black. By inserting black into the bright area, the effect of increasing the total number of frames of the displayed image is achieved, and the smear phenomenon during image display is reduced or eliminated, and the picture quality is improved.
  • Step 204 During the period of displaying one frame of image, after the first preset time, the light is output to the bright area to display an image, and the black insertion area continues to remain black.
  • the light emitting units of the backlight are controlled, thereby outputting bright light to the respective bright light image units 301 in the bright light area to be displayed on the display screen.
  • the image, while still inserting the black image unit 302 in the black insertion area remains black.
  • the light image unit 301 can be prevented from leaking light to the black image unit 302, and the sharpness and contrast of the displayed image are increased, thereby improving the picture quality.
  • the backlight can output light for display, for example, in a normal state.
  • the image signal of the next frame image may be received, so that the brightness, color, and the like of the image of the next frame are parsed in time.
  • FIG. 5 is a schematic structural diagram of an apparatus for displaying a region dimming display image according to an embodiment of the present invention. As shown in FIG. 5, the apparatus for dimming and displaying an image in the embodiment includes: a receiving module 501, a parsing module 502, and a control module 503.
  • the receiving module 501 is configured to receive an image signal of a frame image; the parsing module 502 is configured to parse the image signal, and obtain a backlight control signal corresponding to the bright region and the black insertion region of the image; and the control module 503 is configured to control the backlight according to the backlight control signal Outputting bright light to the bright area and blackening the black insertion area when displaying the one-frame image, or black insertion of the black insertion area and the bright area before the first predetermined time in the display period of the one-frame image
  • the state after the first predetermined time, outputs bright light to the bright area and blacks out the blackened area to display a clear image.
  • the image signal is parsed by the parsing module to obtain a bright region of the image and a black insertion region around the bright region, and the control module outputs bright light to the bright region of the image according to the backlight control signal, and inserts the periphery of the bright region.
  • the black area is blackened to prevent the bright image unit with high brightness from leaking light to the surrounding non-light areas, reducing or eliminating the smear phenomenon when the image is displayed, increasing the contrast and sharpness of the image, and improving the display quality of the image.
  • control module 503 is further configured to control the bright light area to remain black-plugged before displaying the first preset time in the one-frame image period, and after the first preset time, control the backlight to output the bright light to the bright light area, In the display of one frame of image period, the control black insertion area remains black. Moreover, upon displaying the second preset time in one frame of image period, the receiving module 501 receives the image signal of the next frame image.
  • the display device of this embodiment is, for example, a liquid crystal display device.
  • Another embodiment of the present invention further provides a system for area dimming display image, comprising any of the above-mentioned regional dimming display images, to prevent high brightness image unit from leaking light to surrounding black image unit. Reduce or eliminate the smear phenomenon that occurs when displaying images, increasing the sharpness of the image and improving the display quality of the image.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种区域调光显示图像的方法、装置及系统。所述方法包括：接收一帧图像的图像信号；解析所述图像信号，获取与所述图像的亮光区域和插黑区域对应的背光控制信号；根据所述背光控制信号控制背光源对所述亮光区域输出亮光和对所述插黑区域进行插黑，以显示所述图像。这用于避免亮光区域向周边的非亮光区域漏光，降低或消除显示图像时出现的拖影现象，增加了图像的清晰度，提高了图像的显示质量。

Description

区域调光显示图像的方法、 装置及系统 技术领域
本发明的实施例一种区域调光显示图像的方法、 装置及系统。 背景技术
液晶显示器具有重量轻、 低辐射和便于携带等优点， 因此广泛用作电视 机和电脑等终端的显示器。
为了降低液晶显示器中背光源的能耗， 提高液晶显示器显示图像的质 量， 人们已经开发出区域调光（Local Dimming )技术。 这种区域调光技术首 先将图像的按照矩阵式分成若干个图像单元， 然后计算所显示图像中的每个 图像单元的平均亮度， 独立控制各个图像单元的亮度， 提高图像画面的对比 度。
然而， 釆用区域调光技术的液晶显示器在显示图像时， 如果图像中的某 个图像单元的亮度高， 而其余部分为非亮光区域， 背光源不向非亮光区域输 出亮光， 则由于亮光区域和非亮光区域之间的亮度相差比较大， 导致亮光区 域中的图像单元向非亮光区域漏光， 使得图像对比度减小， 降低了图像的显 示质量。 发明内容
本发明的实施例提供一种区域调光显示图像的方法、 装置及系统， 用于 解决现有技术中区域调光的液晶显示器在显示图像时容易发生漏光现象、 图 像质量差的问题。
本发明的一个方面提供一种区域调光显示图像的方法， 包括： 接收一帧 图像的图像信号； 解析所述图像信号， 获取与所述图像的亮光区域和插黑区 域对应的背光控制信号； 根据所述背光控制信号控制所述背光源对所述亮光 区域输出亮光和对所述插黑区域进行插黑， 以显示所述图像。
在该方法中， 例如， 所述才艮据背光控制信号控制所述背光源对所述亮光 区域输出亮光以及对所述插黑区域进行插黑包括： 在显示一帧图像周期中的 第一预设时间之前， 所述亮光区域保持插黑状态； 在第一预设时间之后， 所 述背光源对所述亮光区域输出亮光。
在该方法中， 例如， 在显示一帧图像的周期中， 所述插黑区域保持插黑 状态。
在该方法中， 例如， 所述才艮据背光控制信号控制所述背光源对所述亮光 区域输出亮光以及对所述插黑区域进行插黑包括： 在显示一帧图像周期中的 第二预设时间时， 接收下一帧图像的图像信号。
在该方法中， 例如， 所述插黑区域包括： 与所述亮光区域部接的图像单 元。
本发明的另一个方面还提供了一种区域调光显示图像的装置， 包括： 接 收模块，用于接收一帧图像的图像信号； 解析模块， 用于解析所述图像信号， 获取与所述图像的亮光区域和插黑区域对应的背光控制信号； 控制模块， 用 于根据所述背光控制信号控制所述背光源对所述亮光区域输出亮光和对所 述插黑区域进行插黑， 以显示所述图像。
在该装置中， 例如， 所述控制模块还用于： 在显示一帧图像周期中的第 一预设时间之前， 控制所述亮光区域保持插黑状态； 在第一预设时间之后， 控制所述背光源对所述亮光区域输出亮光。
在该装置中， 例如， 所述控制模块还用于： 在显示一帧图像的周期中， 控制所述插黑区域保持插黑状态。
在该装置中， 例如， 所述接收模块还用于： 在显示一帧图像周期中的第 二预设时间时， 接收下一帧图像的图像信号。
本发明的再一个方面还提供一种区域调光显示图像的系统， 包括上述的 任意一种区域调光显示图像的装置。
本发明实施例提供的区域调光显示图像的方法， 通过获取图像的亮光区 域和亮光区域周边的插黑区域， 以对图像的亮光区域输出亮光， 对亮光区域 周边的插黑区域进行插黑， 避免亮光区域向周边的非亮光区域漏光， 降低或 消除显示图像时出现的拖影现象， 增加了图像的清晰度， 提高了图像的显示 质量。 附图说明 为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为本发明区域调光显示图像的方法第一实施例的流程图；
图 2为本发明区域调光显示图像的方法第二实施例的结构示意图； 图 3为本发明区域调光显示图像的方法第二实施例中图像的亮光区域和 插黑区域分布图；
图 4为本发明区域调光显示图像的方法第二实施例中区域调光显示图像 的方法的时序图；
图 5为本发明区域调光显示图像的装置实施例的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一"、 "第二" 以及类似的词语并不表示任何顺序、 数 量或者重要性， 而只是用来区分不同的组成部分。 同样， "一个" 或者 "一" 等类似词语也不表示数量限制， 而是表示存在至少一个。 "连接" 或者 "相 连" 等类似的词语并非限定于物理的或者机械的连接， 而是可以包括电性的 连接， 不管是直接的还是间接的。 "上"、 "下"、 "左"、 "右" 等仅用于表示 相对位置关系， 当被描述对象的绝对位置改变后， 则该相对位置关系也相应 地改变。
图 1为本发明区域调光显示图像的方法第一实施例的流程图。 如图 1所 示， 本实施例中的区域调光显示图像的方法的流程包括如下步骤。
步骤 101、 接收一帧图像的图像信号。
本实施例中， 以釆用区域调光技术的液晶显示器为例来介绍技术方案， 液晶显示器的屏幕的显示区域按照矩阵形式划分成 ΜχΝ个图像单元。例如， 70英寸的液晶显示器的平面的显示区域可以划分为 16x12个图像单元。在要 显示一帧图像时， 首先， 显示装置首先接收到所要显示的这一帧图像的图像 信号。 图像信号中包括图像的各个像素的亮度、 颜色等信息。 然后， 进入步 骤 102。
步骤 102、 解析图像信号， 获取与图像的亮光区域和插黑区域对应的背 光控制信号。
在本步骤中， 解析图像信号， 得到接收到的图像信号中的图像亮度、 图 像颜色等信息。 然后， 基于显示区域中按照矩阵形式划分成 ΜχΝ个图像单 元， 获取图像的亮光区域和插黑区域， 得到亮光区域所在的亮光图像单元和 插黑区域所在的插黑图像单元。
例如， 如果一个图像单元平均亮度高于某个预设阔值 Α, 则将其定义为 亮光图像单元；如果一个图像单元的平均亮度低于该阔值 Α或低于另一个较 小的预设阔值 B, 则将其定义为插黑图像单元。 预设阔值 A例如为最高显示 亮度值的 80%; 而阔值 B例如为最高显示亮度值的 20%。一个或多个彼此相 邻的亮光图像单元构成亮光区域， 一个或多个彼此相邻的插黑图像单元构成 插黑区域。 所要显示的图像可以包括一个或多个亮光区域， 或者一个或多个 插黑区域。
或者， 例如， 可以将非亮光区域中的全部图像单元进行插黑， 或者将非 亮光区域中与亮光区域相邻接的图像单元进行插黑， 以避免亮光区域向周边 区域漏光。
本实施例中， 插黑区域例如以只包括与亮光区域邻接的图像单元为例来 介绍技术方案。
然后， 根据图像的亮光区域和插黑区域， 计算出显示该图像时背光源的 背光控制信号， 然后进入步骤 103。
步骤 103、 根据背光控制信号控制背光源对亮光区域输出亮光以及对插 黑区域进行插黑， 同时显示图像。
本实施例所釆用的显示器为液晶显示器， 其包括液晶面板和背光源。 该 背光源设置在液晶面板的背面 （或后侧）， 为液晶面板提供显示所需的光。 该背光源例如为直下式背光源， 包括多个彼此并排设置的发光单元（光源）， 与液晶面板的屏幕的显示区域相对应。 这些发光单元例如为冷阴极荧光灯
( CCFL )或者发光二极管（ LED ) ,优选为 LED。这些光源可以被独立控制， 例如开启或关闭， 或者调解发光强度等， 或者可以基于区域划分进行控制。
在本步骤中 , 根据背光控制信号控制背光源中各个发光单元的开关状态 及其亮度等， 对图像的亮光区域输出亮光， 对插黑区域所在的插黑图像单元 进行插黑， 例如， 关闭与插黑区域对应的背光源中的发光单元或者降低这些 发光单元的亮度； 在背光源降低插黑区域中的亮度时， 则例如可以使得该亮 度小于最高亮度的 50%, 例如 20%。 这可以避免由于亮度高的亮光图像单元 向周边的非亮光区域中的图像单元漏光而导致的图像质量下降， 从而可以增 加图像的清晰度和对比度， 提高图像的质量。
在本实施例中， 首先获取图像的亮光区域和亮光区域周边的插黑区域， 其次在显示图像时， 通过控制背光源对图像的亮光区域输出亮光， 对亮光区 域周边的插黑区域进行插黑， 由此避免亮光区域向周边的非亮光区域漏光， 降低或消除显示图像时出现的拖影现象， 增加了图像的清晰度， 提高了图像 的显示质量。
图 2为本发明区域调光显示图像的方法第二实施例的结构示意图， 图 3 为本发明区域调光显示图像的方法第二实施例中图像的亮光区域和插黑区 域分布图， 图 4为本发明区域调光显示图像的方法第二实施例中区域调光显 示图像的方法的时序图。
如图 2所示， 本实施例区域调光显示图像的方法的流程包括如下步骤。 步骤 201、 接收一帧图像的图像信号。
本实施例中， 以釆用区域调光技术的液晶显示器为例来介绍技术方案， 图像的显示频率为 60帧 /秒，每一帧图像的显示周期 T为 l/60s, 约为 16ms。 在显示一帧图像之前， 首先接收到所要显示的这一帧图像的图像信号， 图像 信号中包括图像的各个像素的亮度、 颜色等信息， 然后进入步骤 202。
步骤 202、 解析图像信号， 获取与图像的亮光区域和插黑区域对应的背 光控制信号。
在本步骤中， 解析图像信号， 获取图像的亮光区域和插黑区域。 例如， 釆用与上述步骤 102相似的方式来确定亮光图像单元、 插黑图像单元， 由此 得到亮光区域和插黑区域。 如图 3所示的示例中， 插黑区域所在的插黑图像 单元 301分布在亮光区域所在亮光图像单元 302的周边， 其余的区域 303则 没有特别定义。 根据解析得到的图像的亮光区域和插黑区域， 计算出显示该 图像时背光源的背光控制信号， 然后进入步骤 203。
步骤 203、 显示一帧图像的周期之中， 在第一预设时间之前， 亮光区域 和插黑区域均保持插黑状态。
本步骤中， 如图 4所示， 在显示一帧图像的周期 T中， 插黑区域一直保 持插黑状态， 而在显示一帧图像的周期 T中的第一预设时间 tl之前，亮光区 域同样也保持插黑状态， 例如， 控制背光源的与插黑区域和亮光区域对应的 发光单元， 将其关闭或亮度降低； 在背光源降低插黑区域中的亮度时， 则例 如可以使得该亮度小于最高亮度的 50%, 例如 20%。 等到达第一预设时间 tl 之后， 进入步骤 204。
在实际应用中， 显示一帧图像的周期 T为 16ms, 第一预设时间 tl例如 可以设定为 1/180s, tl约为 5.6ms;在显示一帧图像的周期 16ms的前 5.6ms, 亮光区域同样也保持插黑状态。 通过对亮光区域进行插黑， 以达到增加显示 图像总帧数的效果， 降低或消除图像显示时的拖影现象， 提高画面质量。
步骤 204、 显示一帧图像的周期之中， 在第一预设时间之后， 向亮光区 域输出亮光以显示图像， 插黑区域继续保持插黑状态。
本步骤中， 显示一帧图像的周期 T之中， 在第一预设时间 tl之后， 控制 背光源的发光单元， 从而向亮光区域中的各个亮光图像单元 301输出亮光， 以在显示屏幕上显示图像， 同时对于插黑区域中的插黑图像单元 302仍然保 持插黑状态。 这样既可以避免亮光图像单元 301向插黑图像单元 302漏光， 又增加了显示图像的清晰度和对比度， 提高了画面质量。 而对于除插黑区域 和亮光区域之外其他区域 303 , 背光源例如可以按照正常状态输出光以进行 显示。
例如，在显示一帧图像的周期 T中的第二预设时间 t2时，可以接收下一 帧图像的图像信号， 以便及时解析出下一帧图像的亮度、颜色等信息。例如， 第二预设时间 t2可以设定为周期 T中的最后 l/240s, l/240s约为 4.2ms, 即 在 16-4.2=11.8ms的时刻接收下一帧图像的图像信号。
在本实施例中， 通过控制背光源以对图像的亮光区域先进行插黑， 然后 再输出亮光， 以达到增加显示图像总帧数的效果， 降低或消除图像显示时的 拖影现象。 对亮光区域周边的各个插黑图像单元进行插黑， 避免亮度高的亮 光图像单元向周边的插黑图像单元漏光， 增加了图像的清晰度和对比度， 提 高了图像的显示质量。
图 5为本发明实施例的区域调光显示图像的装置实施例的结构示意图。 如图 5所示， 本实施例区域调光显示图像的装置包括： 接收模块 501、 解析模块 502和控制模块 503。
接收模块 501用于接收一帧图像的图像信号； 解析模块 502用于解析图 像信号， 获取与图像的亮光区域和插黑区域对应的背光控制信号； 控制模块 503用于根据背光控制信号控制背光源在显示该一帧图像时对亮光区域输出 亮光和对插黑区域进行插黑， 或者在该一帧图像的显示周期之中， 在第一预 定时间之前对于插黑区域和亮光区域均保持插黑状态， 而在第一预定时间之 后对亮光区域输出亮光和对插黑区域进行插黑， 以显示出清晰的图像。
在本实施例中， 通过解析模块解析出图像信号以获取图像的亮光区域和 亮光区域周边的插黑区域， 通过控制模块来根据背光控制信号对图像的亮光 区域输出亮光， 对亮光区域周边的插黑区域进行插黑， 避免亮度高的亮光图 像单元向周边的非亮光区域漏光， 降低或消除显示图像时出现的拖影现象， 增加了图像的对比度和清晰度， 提高了图像的显示质量。
例如，控制模块 503还用于在显示一帧图像周期中的第一预设时间之前， 控制亮光区域保持插黑状态， 在第一预设时间之后， 控制背光源对所述亮光 区域输出亮光，而在显示一帧图像周期中，控制插黑区域一直保持插黑状态。 而且， 在显示一帧图像周期中的第二预设时间时， 接收模块 501接收下一帧 图像的图像信号。
本实施例的显示装置例如为液晶显示装置。
本发明的另一个实施例还提供一种区域调光显示图像的系统， 包括上述 的任意一种区域调光显示图像的装置， 以避免亮度高的亮光图像单元向周边 的插黑图像单元漏光， 降低或消除显示图像时出现的拖影现象， 增加了图像 的清晰度， 提高了图像的显示质量。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1. 一种区域调光显示图像的方法， 包括：
接收一帧图像的图像信号；
解析所述图像信号， 获取与所述图像的亮光区域和插黑区域对应的背光 控制信号；
根据所述背光控制信号控制所述背光源对所述亮光区域输出亮光和对 所述插黑区域进行插黑， 以显示所述图像。
2. 根据权利要求 1所述的区域调光显示图像的方法， 其中， 所述根据背 光控制信号控制所述背光源对所述亮光区域输出亮光以及对所述插黑区域 进行插黑具体包括：
在显示一帧图像周期中的第一预设时间之前， 所述亮光区域保持插黑状 态；
在第一预设时间之后， 所述背光源对所述亮光区域输出亮光， 以显示所 述图像。
3. 根据权利要求 1或 2所述的区域调光显示图像的方法， 其中，在显示 一帧图像的周期中， 所述插黑区域保持插黑状态。
4. 根据权利要求 2所述的区域调光显示图像的方法， 其中， 所述根据背 光控制信号控制所述背光源对所述亮光区域输出亮光以及对所述插黑区域 进行插黑具体包括：
在显示一帧图像周期中的第二预设时间时， 接收下一帧图像的图像信 号。
5. 根据权利要求 1-4任意一项所述的区域调光显示图像的方法， 其中， 所述插黑区域包括：
与所述亮光区域邻接的图像单元。
6. 根据权利要求 1-5任意一项所述的区域调光显示图像的方法， 其中， 所述亮光区域为平均亮度高于一个预设阔值的区域。
7. 一种区域调光显示图像的装置， 包括：
接收模块， 用于接收一帧图像的图像信号；
解析模块， 用于解析所述图像信号， 获取与所述图像的亮光区域和插黑 区域对应的背光控制信号；
控制模块， 用于根据所述背光控制信号控制所述背光源对所述亮光区域 输出亮光和对所述插黑区域进行插黑， 以显示所述图像。
8. 根据权利要求 7所述的区域调光显示图像的装置， 其中， 所述控制模 块还用于：
在显示一帧图像周期中的第一预设时间之前， 控制所述亮光区域保持插 黑状态；
在第一预设时间之后， 控制所述背光源对所述亮光区域输出亮光。
9. 根据权利要求 7或 8所述的区域调光显示图像的装置， 其中， 所述控 制模块还用于：
在显示一帧图像的周期中 , 控制所述插黑区域保持插黑状态。
10. 根据权利要求 8所述的区域调光显示图像的装置， 其中， 所述接收 模块还用于：
在显示一帧图像周期中的第二预设时间时， 接收下一帧图像的图像信 号。
11. 一种区域调光显示图像的系统， 包括权利要求 7-10所述的任意一种 区域调光显示图像的装置。
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