CN101888726A - Adaptive stepping-control system and method of dynamic backlight control - Google Patents

Adaptive stepping-control system and method of dynamic backlight control Download PDF

Info

Publication number
CN101888726A
CN101888726A CN2009101429013A CN200910142901A CN101888726A CN 101888726 A CN101888726 A CN 101888726A CN 2009101429013 A CN2009101429013 A CN 2009101429013A CN 200910142901 A CN200910142901 A CN 200910142901A CN 101888726 A CN101888726 A CN 101888726A
Authority
CN
China
Prior art keywords
backlight
control
adaptive
dynamic
content
Prior art date
Application number
CN2009101429013A
Other languages
Chinese (zh)
Inventor
沈国良
陈星嘉
Original Assignee
承景科技股份有限公司;奇景光电股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 承景科技股份有限公司;奇景光电股份有限公司 filed Critical 承景科技股份有限公司;奇景光电股份有限公司
Priority to CN2009101429013A priority Critical patent/CN101888726A/en
Publication of CN101888726A publication Critical patent/CN101888726A/en

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/40Control techniques providing energy savings
    • Y02B20/42Control techniques providing energy savings based on timing means or schedule

Abstract

The invention relates to adaptive stepping-control system and method of dynamic backlight control (DBLC). A stepping-control unit regulates the output of a backlight control device to ensure that illumination of backlight generated by the backlight unit is slowly changed, wherein the illumination change amount (i.e. stepping rate) of the backlight in per unit time is changed according to the content of image data.

Description

动态背光控制的适应性步进控制系统及方法 Stepping adaptive control system and method of dynamic backlight control

技术领域 FIELD

[0001] 本发明涉及一种动态背光控制,特别是涉及一种动态背光控制的适应性步进控制(adaptive stepping—control)系统及方法。 [0001] The present invention relates to a dynamic backlight control, and more particularly to adaptive step control of a dynamic backlight control (adaptive stepping-control) systems and methods.

背景技术 Background technique

[0002] 背光(backlight)是用以从背面或侧面来照亮平面显示器(例如液晶显示器)的一种技术。 [0002] The backlight (Backlight) is a technique used to illuminate the back or side of the flat panel display (e.g., liquid crystal display). 光源可以是冷阴极管(CCFL)、发光二极管(LED)或其他光源。 The light source may be a cold cathode tube (CCFL), a light emitting diode (LED) or other light sources.

[0003] 固定式背光(constant backlight)不管影像数据或周边光线如何变化都会提供稳定固定的光线。 [0003] The backlight fixed (constant backlight) regardless of the ambient light or image data change is to provide a stable fixing light. 固定式背光的缺点之一为,当显示黑阶(“0”)时会有漏光(light leakage)现象,因而造成不良的动态对比特性。 One disadvantage of the backlight is fixed, when displaying the black level ( "0") have a light leakage (light leakage) phenomenon, resulting in poor dynamic contrast characteristic.

[0004] 为了增加其对比,必须使用动态背光(dynamic backlight,DBL)技术,其动态地或适应性地(adaptively)根据影像数据的分布情形或周边光线以调整整体或特定部分的背光亮度。 [0004] In order to increase the contrast, the backlight must be dynamically (dynamic backlight, DBL) technology, which dynamically or adaptively (Adaptively) or according to the distribution of the ambient light to adjust the overall video data or a specific part of the backlight luminance. 例如,当显示亮影像时,背光会输出高亮度;当显示暗影像时,则减弱背光的输出亮度,因而可以减少漏光。 For example, when displaying a bright image, a high brightness of the backlight is output; when displaying dark images, the backlight output luminance decrease, thus reducing leakage of light. 藉此,动态背光比固定式背光具有较高的动态对比。 Accordingly, the dynamic backlight having high dynamic contrast than the fixed type backlight. 再者,与固定式背光相较之下,动态背光还可以减少功率的消耗。 Moreover, compared with a backlight under stationary, dynamic backlight power consumption may be reduced further.

[0005] 然而,当相邻影像讯框(以下简称“讯框”)的亮度差异很大时(例如,10%亮度的讯框跟随着一个90%亮度的讯框),不可骤然改变背光的输出照度,否则,观者会感觉到闪烁。 [0005] However, when the adjacent image information blocks (hereinafter referred to as "frame information") of differing brightness (e.g., 10% of the luminance information frame followed by a 90% luminance information frame), can not suddenly change the backlight output illumination, otherwise, the audience will feel flashes. 为了避免此问题,需要以和缓的方式来改变背光的输出照度。 To avoid this problem, in a gentle manner required to change the output of the illumination of the backlight. 图1显示一种和缓改变背光照度的传统技术。 1 shows one kind of gentle change of the conventional art backlight illumination. 在图式中,背光的照度从原照度值(V)以步进方式(stepwise)逐渐改变至目标照度值(V+4)。 In the drawings, the backlight illumination from an original luminance value (V) in a stepwise manner (StepWise) is gradually changed to the target luminance value (V + 4). 如图所示,背光照度并非从原照度值(V)骤然变为目标照度值(V+4),而是在每一时间增加一些背光照度。 As shown, not Zhou Ranbian backlight illumination from an original luminance value (V) as a target illuminance value (V + 4), but the increase in the number of backlight illumination each time. 特别的是,在每一单位时间增加一单位的背光照度。 In particular, a unit increase in backlight illumination per unit time. 换句话说,图1所示的传统作法中,其照度改变具有固定的步进率(st印ping rate), 或称为调光率(dimming rate)。 In other words, the conventional approach shown in FIG. 1, which has a fixed illuminance change rate step (st printing ping rate), otherwise known as the dimming ratio (dimming rate).

[0006] 上述的传统技术于某些应用中的效果尚可接受,例如当相邻讯框具有类似的亮度时(例如,显示于电脑显示器的图形使用者介面(GUI))。 [0006] The conventional technology in certain applications the effect is acceptable, for example, when the neighboring block have similar luminance information (e.g., computer monitor to display a graphical user interface (GUI)). 然而,当相邻讯框的亮度差异很大时,例如动画或电影,此种传统技术所产生的效果并不佳。 However, when the adjacent block information of a large difference in brightness, for example, movie or animation effects, such conventional techniques, and the resulting poor. 举例而言,当背光照度正以图1所示的上升步进增加时,此时如果突然从亮讯框变为暗讯框,则背光照度将立即改以下降步进,因而造成前一讯框的目标照度值(V+4)根本无法达到。 For example, when the backlight illumination is increasing at rising step shown in FIG. 1, at this time if the block suddenly becomes dark from light information inquiry frame, the backlight illumination will be diverted immediately lowered step, resulting in the previous hearing target illuminance values ​​box (V + 4) simply can not achieve.

[0007] 由此可见,传统背光控制无法跟上影像的改变,显然仍存在有不便与缺陷,而亟待加以进一步改进。 [0007] Thus, the conventional backlight control can not keep up with the changing image, it is clear there are still problems and disadvantages, and the urgent need to be further improved. 为了解决上述存在的问题,相关厂商莫不费尽心思来谋求解决之道,但长久以来一直未见适用的设计被发展完成,而一般产品及方法又没有适切的结构及方法能够解决上述问题,此显然是相关业者急欲解决的问题。 In order to solve the above problems, the firms did not dare to think hard and to seek a solution, but has long been seen to be applicable to the design of the development is complete, and general product and the method nor the relevance of the structures and methods can solve the above problems, this is obviously related businesses eager to solve the problem. 因此如何能创设一种有效的机制,用以适应性控制背光照度的步进率(或调光率),使得背光不但能和缓改变其照度,也能快速跟上影像的改变,实属当前重要研发课题之一,亦成为当前业界极需改进的目标。 So how can create an effective mechanism for controlling the step rate adaptive backlight illumination (or dimming rate), so that not only can gentle changes its backlight illumination can be changed quickly to keep up with the image, it is important current one research topics, has become the current industry in dire need of improvement goals. 发明内容 SUMMARY

[0008] 本发明的目的在于,提出一种用于动态背光的适应性步进控制,用以达到和缓的显示及良好的对比特性,非常适于实用。 [0008] The object of the present invention is to propose a method for dynamic adaptive step control of the backlight to achieve gentle contrast and good display characteristics, very suitable for practical use.

[0009] 本发明的目的及解决其技术问题是采用以下技术方案来实现的。 [0009] objects and to solve the technical problem of the invention is achieved by the following technical solutions. 依据本发明提出的一种动态背光控制的适应性步进控制(adaptivest印ping-control)系统,包含:一动态背光控制装置,用以动态调整背光照度;以及一步进控制单元,用以调整该背光控制装置的输出,使得一背光单元所产生的背光照度得以和缓改变;其中,每单位时间的背光照度改变量是根据影像数据的内容作改变。 Based on a dynamic adaptive step control of the present invention proposed a backlight control (adaptivest printed ping-control) system, comprising: a dynamic backlight control means for dynamically adjusting the backlight illumination; and stepping control means to adjust output the backlight control device, a backlight unit such that the backlight illumination is generated mild change; wherein the backlight illumination change amount per unit time is changed according to the content for the video data.

[0010] 本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。 [0010] objects and solve the technical problem of the present invention can also be further achieved by the following technical measures.

[0011] 前述的动态背光控制的适应性步进控制系统,其中上述的背光单元受控于该步进控制单元,以步进方式(st印wise)改变照度。 [0011] The adaptive stepper control system of the dynamic backlight control, the backlight unit wherein said control unit is controlled by the step, in a stepwise manner (st printing Wise) change illumination.

[0012] 前述的动态背光控制的适应性步进控制系统,其中上述的步进控制单元产生脉宽调变(PWM)信号,其工作周期(duty)与该背光照度成比例。 [0012] The adaptive stepper control system of the dynamic backlight control, wherein said control means generates stepping pulse width modulation (PWM) signal whose duty cycle (duty) is proportional to the illuminance of the backlight.

[0013] 前述的动态背光控制的适应性步进控制系统,其更包含一内容变化率估算装置, 其接收及分析该影像数据的内容,以估算该影像数据的内容变化率。 [0013] The adaptive stepper control system of the dynamic backlight control, further comprising a content change rate estimating means, which receive and analyze the content of the image data to estimate the rate of change of the content of the video data.

[0014] 前述的动态背光控制的适应性步进控制系统,其中上述的内容为一影像讯框的平均亮度。 [0014] The adaptive stepper control system of the dynamic backlight control, wherein said content is a video information frame average luminance.

[0015] 本发明的目的及解决其技术问题还采用以下技术方案来实现。 [0015] objects and solve the technical problem of the invention is also achieved by the following technical solution. 依据本发明提出的一种动态背光控制的适应性步进控制(adaptivest印ping-control)方法,包含:根据影像数据以产生背光控制信号;以及调整该背光控制信号,使得一背光单元所产生的背光照度得以和缓改变; Based on the adaptive step control (adaptivest printed ping-control) method of the present invention proposed dynamic backlight control, comprising: a backlight according to the image data to generate a control signal; and adjusting the backlight control signal, a backlight unit such that the generated backlight illumination change is gentle;

[0016] 其中,每单位时间的背光照度改变量根据该影像数据的内容作改变。 [0016] wherein backlight illumination change amount per unit time be changed according to the content of the video data.

[0017] 本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。 Objects and solve the technical problem [0017] The present invention may also be further achieved by the following technical measures.

[0018] 前述的动态背光控制的适应性步进控制方法,其中上述的背光单元受控于该调整后的背光控制信号,以步进方式(stepwise)改变照度。 [0018] The adaptive control method of the stepping dynamic backlight control, the backlight wherein the backlight unit described above is controlled by the adjusted control signal in a stepwise manner (StepWise) change illumination.

[0019] 前述的动态背光控制的适应性步进控制方法,其中上述调整后的背光控制信号为脉宽调变(PWM)信号,其工作周期(duty)与该背光照度成比例。 [0019] The adaptive control method of the stepping dynamic backlight control, the backlight wherein the adjustment signal is a pulse width modulation control (PWM) signal whose duty cycle (duty) is proportional to the illuminance of the backlight.

[0020] 前述的动态背光控制的适应性步进控制方法,其中上述调整后的背光控制信号为脉宽调变(PWM)信号,其工作周期(duty)与该背光照度成比例。 [0020] The adaptive control method of the stepping dynamic backlight control, the backlight wherein the adjustment signal is a pulse width modulation control (PWM) signal whose duty cycle (duty) is proportional to the illuminance of the backlight.

[0021] 前述的动态背光控制的适应性步进控制方法,其中上述的内容为一影像讯框的平均亮度。 [0021] The adaptive control method of the stepping dynamic backlight control, wherein said content information is the average luminance of an image frame.

[0022] 借由上述技术方案,本发明动态背光控制的适应性步进控制系统及方法至少具有下列优点及有益效果:本发明背光步进控制可根据讯框的内容变化率而适应性地改变。 [0022] By the above aspect, the adaptive stepper dynamic backlight control system and method of the present invention, the control has at least the following advantages and beneficial effects: a backlight control step of the present invention may be adaptively changed according to the rate of change of the content of the information frame . 藉此,讯框可和缓地显示且不具闪烁,另外,背光也可快速地反应至目标照度,因而得以获得良好的动态对比。 Accordingly, the information frame can not be displayed with blinking gently, Further, the backlight can react quickly to the target illuminance, thereby to obtain a good dynamic contrast.

[0023] 数据数据综上所述,本发明一种动态背光控制(DBLC)的适应性步进控制(adaptive stepping-control)系统及方法。 [0023] The data above, the present invention is a dynamic backlight control (the DBLC) step adaptive control (adaptive stepping-control) systems and methods. 步进控制单元调整背光控制装置的输出,使得背光单元所产生的背光照度得以和缓改变。 Stepping the control unit adjusts the output of the backlight control device, the backlight unit such that the backlight illumination is generated by gentle change. 其中,每单位时间的背光照度改变量(亦即,步进率)是根据影像数据的内容作改变的。 Wherein the backlight illumination change amount (i.e., step rate) per unit time is changed according to the content for the video data. 本发明在技术上有显著的进步,并具有明显的积极效果,诚为一新颖、进步、实用的新设计。 The present invention is technically significant progress, and have a significant positive effect - for a novel, progressive and practical new design.

[0024] 上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段, 而可依照说明书的内容予以实施,并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂,以下特举较佳实施例,并配合附图,详细说明如下。 [0024] The above description is only an overview of the technical solution of the present invention, in order to more fully understood from the present invention, but may be implemented in accordance with the contents of the specification, and in order to make the aforementioned and other objects, features and advantages of the present invention can be more apparent from the following Patent cited preferred embodiments accompanied with figures are described in detail below.

附图说明 BRIEF DESCRIPTION

[0025] 图1显示一种和缓改变背光照度的传统技术示意图。 [0025] FIG. 1 shows a schematic view of a conventional backlight illumination technique of gentle change.

[0026] 图2显示本发明实施例的动态背光控制(DBLC)的适应性步进率控制系统及方法示意图。 [0026] Figure 2 shows an example of a dynamic backlight control (the DBLC) step rate adaptation system and method for controlling a schematic embodiment of the present invention.

[0027] 图3例示一慢速内容改变的讯框序列及步进控制期间的相对应背光照度示意图。 [0027] corresponding to the backlight illumination schematic diagram illustrating a slow change of the content information during a frame sequence of three cases and stepping control.

[0028] 图4例示一快速内容改变的讯框序列及步进控制期间的相对应背光照度示意图。 [0028] corresponding to the backlight illumination period schematic FIG. 4 illustrates a rapid change of the content information and the frame sequence control step.

[0029] 200 :适应性步进率控制系统及方法 [0029] 200: step rate adaptive control system and method

[0030] 20 :动态背光控制(DBLC)装置22 :步进控制单元 [0030] 20: Dynamic Backlight Control (the DBLC) means 22: step-control unit

[0031] 24:背光单元 26:内容变化率估算装置 [0031] 24: Backlight unit 26: content rate change estimation means

具体实施方式 Detailed ways

[0032] 为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例,对依据本发明提出的动态背光控制的适应性步进控制系统及方法其具体实施方式、结构、方法、步骤、特征及其功效,详细说明如后。 [0032] To further elaborate the technical means and effects the present invention is predetermined to achieve the object of the invention taken in conjunction with the accompanying drawings and the following preferred embodiments, the adaptive control system and method for a stepping dynamic backlight control according to the present invention provides a specific embodiments, structures, methods, steps, characteristics and efficacy, as will be described in detail.

[0033] 有关本发明的前述及其他技术内容、特点及功效,在以下配合参考图式的较佳实施例的详细说明中将可清楚呈现。 [0033] For the aforementioned and other technical contents, characteristics and effects of the present invention, it can be clearly presented in the detailed description of the preferred embodiment with reference to the drawings in the following. 通过具体实施方式的说明,当可对本发明为达成预定目的所采取的技术手段及功效得一更加深入且具体的了解,然而所附图式仅是提供参考与说明之用,并非用来对本发明加以限制。 By way of illustration specific embodiments, when the can of the present invention to achieve the intended purpose of the technical means and effects to give a thoroughly and concretely understood, however, that the appended drawings are merely provided for reference and illustration, and is not used to the present invention be limited.

[0034] 图2显示本发明实施例的动态背光控制(dynamic backlight control, DBLC)的适应性步进率(或调光率)控制系统及方法200。 [0034] Figure 2 shows the dynamic backlight control (dynamic backlight control, DBLC) embodiment of the present invention adaptive step rate (or dimming rate) control system and method 200. 在本实施例中,动态背光控制(DBLC)装置20可动态地根据影像数据的分布情形以调整整体或特定部分的背光亮度。 In the present embodiment, dynamic backlight control (the DBLC) apparatus 20 according to the distribution of dynamically to adjust the overall video data or a specific part of the backlight luminance. 例如,当显示亮影像时,背光会输出高亮度;当显示暗影像时,则减弱背光的输出亮度。 For example, when displaying a bright image, a high brightness of the backlight is output; when displaying dark images, the reduced brightness of the backlight output. 在其他实施例中, 动态背光控制(DBLC)装置20可动态地根据周边光线以调整整体或特定部分的背光亮度。 In other embodiments, dynamic backlight control (the DBLC) apparatus 20 may be dynamically adjusted according to the overall ambient light or a specific part of the backlight luminance.

[0035] 动态背光控制(DBLC)装置20的输出藉由步进控制单元22以提供控制信号给背光单元(BLU) 24。 [0035] Dynamic Backlight Control (the DBLC) outputted by the stepping of the control unit 20 to provide control signals to the backlight unit (BLU) 24 22. 在一实施例中,动态背光控制(DBLC)装置20藉由步进控制单元22以提供脉宽调变(PWM)信号,其工作周期(duty)与背光照度成比例。 In one embodiment, dynamic backlight control (the DBLC) by stepping the control unit 20 to provide pulse width modulation (PWM) signal 22, which is the duty cycle (duty) is proportional to the backlight illumination. 步进控制单元22(其可以为一电路)是用以调整动态背光控制(DBLC)装置20的输出,使得背光单元(BLU)24所产生的背光照度能以和缓方式来改变。 Stepping the control unit 22 (which may be a circuit) is used to adjust the dynamic backlight control (the DBLC) output device 20, the backlight unit (BLU) 24 backlight illumination can be varied to produce gentle manner. 在本实施例中,背光单元(BLU) 24的照度中以步进方式(stepwise)从原照度值改变为目标照度值,而非骤然从原照度值直接变为目标照度值, 因而可以改善闪烁的问题。 In the present embodiment, a backlight unit (BLU) 24 in the illuminance in a stepwise manner (StepWise) is changed from the luminance value of the original luminance value of the target, rather than from the original luminance value suddenly becomes the target luminance value directly, it is possible to improve flicker The problem.

[0036] 在本实施例中,每一单位时间的背光亮度改变量(或步距)是根据影像数据的内容来改变的。 [0036] In the present embodiment, the backlight luminance change amount per unit time (or pitches) is based on the content of the video data is changed. 换句话说,步进率(或调光率)一般来说并非是固定值。 In other words, the step rate (or dimming rate) does not generally a fixed value. 输入至步进控制单元22的可变步进率是由内容变化率估算(content change-rate estimation)装置26来决定,其接收并分析影像数据以估算影像数据的内容变化率。 Variable step input to the control unit 22 of the step is to estimate the rate of change of the content (content change-rate estimation) unit 26 determines that receives and analyzes the image data to estimate the rate of change of the content of the video data. [0037] 图3例示一慢速内容改变的讯框序列及步进控制期间的相对应背光照度。 Corresponding to the backlight illumination diagram illustrating a slow change of the content information during a frame sequence of three cases and controls stepping [0037]. 如图所示,亮讯框Fl至F3的平均亮度分别对应至90%背光照度。 As shown, light information frame Fl to F3 average luminance respectively correspond to 90% of the backlight illumination. 接下来,暗讯框F4至Fll的平均亮度分别对应至10%背光照度。 Next, the average luminance of the dark frame F4 to Fll information correspond respectively to 10% backlight illumination. 根据图式,由于暗讯框F4至Fll的数量很大(例如大于一预设值),因此,内容变化率估算装置26判定讯框序列Fl至Fll为慢速内容改变。 According to the drawings, since the number of dark information frame F4 to Fll is large (e.g. larger than a predetermined value), therefore, the content change rate estimating means 26 determines the sequence information frame Fl to Fll content change is slow. 因此, 内容变化率估算装置26即提供较小的照度步进率(例如-10% )给予背光单元(BLU) 24。 Thus, the content change rate estimating means 26 providing a small illumination step rate (e.g. 10%) to give a backlight unit (BLU) 24. 换句话说,背光单元(BLU) 24每一单位时间会减少10%照度。 In other words, a backlight unit (BLU) 24 per unit time will be reduced by 10% illumination.

[0038] 图4例示一快速内容改变的讯框序列及步进控制期间的相对应背光照度。 [0038] The backlight illumination period corresponding to FIG. 4 illustrates a rapid change of the content information and the frame sequence control step. 如图所示,亮讯框Fl至F2的平均亮度分别对应至90%背光照度。 As illustrated, the light luminance information to an average frame Fl and F2 respectively corresponding to 90% of the backlight illumination. 接下来,暗讯框F3至F4的平均亮度分别对应至10%背光照度。 Next, the dark frame average luminance information F3 to F4 corresponding to 10% of the backlight illumination. 再者,亮讯框F5至F6的平均亮度分别对应至90%背光照度。 Furthermore, light block average luminance information F5 to F6 correspond to 90% of the backlight illumination. 最后,暗讯框F7跟在F6之后。 Finally, after dark with the news box F7 F6. 根据图式,由于暗讯框F3至F4的数量很小(例如小于一预设值),因此,内容变化率估算装置26判定讯框序列在F4之前为快速内容改变。 According to the drawings, since the small number of dark information frame F3 to F4 (e.g. less than a predetermined value), therefore, the content change rate estimating means 26 determines the frame sequence information is quickly changed content before F4. 因此, 内容变化率估算装置26即提供较大的照度步进率(例如-40% )给予背光单元(BLU) 24。 Thus, the content change rate estimating means 26 providing greater illumination step rate (e.g. 40%) to give a backlight unit (BLU) 24. 换句话说,背光单元(BLU) 24每一单位时间会减少40%照度。 In other words, a backlight unit (BLU) 24 per unit time will be reduced by 40% illumination. 接着,影像又从暗讯框F3-F4 转变为亮讯框F5-F6。 Subsequently, the image information block and from dark to light transition F3-F4 inquiry frame F5-F6. 由于亮讯框F5至F6的数量很小(例如小于一预设值),因此,内容变化率估算装置26判定讯框序列于F5之后亦为快速内容改变。 Since the light information frame F5 to F6, a small number (e.g. less than a predetermined value), therefore, the content change rate estimating means 26 determines the frame sequence information to a content change after F5 is also fast. 因此,内容变化率估算装置26即提供较大的照度步进率(例如+40% )给予背光单元(BLU) 24。 Thus, the content change rate estimating means 26 providing greater illumination step rate (e.g. + 40%) to give a backlight unit (BLU) 24. 换句话说,背光单元(BLU) 24每一单位时间会增加40%照度。 In other words, a backlight unit (BLU) 24 per unit time increases by 40% illumination.

[0039] 根据上述实施例,背光步进控制可根据讯框的内容变化率而适应性地改变。 [0039] According to the above embodiment, the backlight control step may be adaptively changed according to the rate of change of the content of the information frame. 藉此, 讯框可和缓地显示且不具闪烁,另外,背光也可快速地反应至目标照度,因而得以获得良好的动态对比。 Accordingly, the information frame can not be displayed with blinking gently, Further, the backlight can react quickly to the target illuminance, thereby to obtain a good dynamic contrast.

[0040] 以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的方法及技术内容作出些许的更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。 [0040] The above are only preferred embodiments of the present invention only, not limitation of the present invention in any form, although the invention has been disclosed above by the preferred embodiments, but not intended to limit the present invention, anyone familiar with Those skilled in the art, without departing from the scope of the technical solution of the present invention, when the method disclosed above can be utilized to make various omissions, substitutions and the technical contents of the embodiment is a modification or equivalent change in the equivalent, but all without departing from the aspect of the present invention content, according to the technical spirit of the present invention, any simple modification of the above embodiment made equivalent modifications and variations, provided they fall within the scope of the present invention.

Claims (10)

  1. 一种动态背光控制的适应性步进控制系统,其特征在于其包含:一动态背光控制装置,用以动态调整背光照度;以及一步进控制单元,用以调整该背光控制装置的输出,使得一背光单元所产生的背光照度得以和缓改变;其中,每单位时间的背光照度改变量是根据影像数据的内容作改变。 Adaptive stepper control system of a dynamic backlight control, characterized in that it comprises: a dynamic backlight control means for dynamically adjusting the backlight illumination; and stepping control means for adjusting the output of the backlight control means, such that a backlight unit backlight illumination is generated mild change; wherein the backlight illumination change amount per unit time is changed according to the content for the video data.
  2. 2.根据权利要求1所述的动态背光控制的适应性步进控制系统,其特征在于其中上述的背光单元受控于该步进控制单元,以步进方式改变照度。 The adaptive stepper control system of dynamic backlight control according to claim 1, wherein the backlight unit wherein said control unit is controlled by the stepping, illuminance change in a stepwise manner.
  3. 3.根据权利要求1所述的动态背光控制的适应性步进控制系统,其特征在于其中上述的步进控制单元产生脉宽调变信号,其工作周期与该背光照度成比例。 3. The adaptive dynamic backlight control stepper control system according to claim 1, wherein the step wherein said control unit generates a PWM signal, whose duty cycle is proportional to the illuminance of the backlight.
  4. 4.根据权利要求1所述的动态背光控制的适应性步进控制系统,其特征在于其更包含一内容变化率估算装置,其接收及分析该影像数据的内容,以估算该影像数据的内容变化率。 The adaptive stepper control system of dynamic backlight control according to claim 1, characterized in that it further comprises a content change rate estimating means, which receive and analyze the content of the image data, to estimate the content of the video data the rate of change.
  5. 5.根据权利要求4所述的动态背光控制的适应性步进控制系统,其特征在于其中上述的内容为一影像讯框的平均亮度。 The adaptive stepper control system of claim 4 dynamic backlight control as claimed in claim, characterized in that wherein the above-described content information is the average luminance of an image frame.
  6. 6. 一种动态背光控制的适应性步进控制方法,其特征在于其包含:根据影像数据以产生背光控制信号;以及调整该背光控制信号,使得一背光单元所产生的背光照度得以和缓改变;其中,每单位时间的背光照度改变量根据该影像数据的内容作改变。 Adaptive stepper control method of a dynamic backlight control, characterized in that it comprises: the backlight according to the image data to generate a control signal; and adjusting the backlight control signal, a backlight unit such that the backlight illumination is generated mild change; wherein the backlight illumination change amount per unit time be changed according to the content of the video data.
  7. 7.根据权利要求6所述的动态背光控制的适应性步进控制方法,其特征在于其中上述的背光单元受控于该调整后的背光控制信号,以步进方式改变照度。 The adaptive control method of the stepping dynamic backlight control according to claim 6, wherein wherein said backlight unit is controlled by the backlight control signal after the adjustment, the illuminance change in a stepwise manner.
  8. 8.根据权利要求6所述的动态背光控制的适应性步进控制方法,其特征在于其中上述调整后的背光控制信号为脉宽调变信号,其工作周期与该背光照度成比例。 The adaptive control method of the stepping dynamic backlight control according to claim 6, characterized in that after the adjustment of the backlight control signal to the PWM signal, the duty cycle which is proportional to the backlight illumination.
  9. 9.根据权利要求6所述的动态背光控制的适应性步进控制方法,其特征在于其更包含一步骤,用以接收及分析该影像数据的内容,以估算该影像数据的内容变化率。 9. The adaptive control method of the stepping dynamic backlight control according to claim 6, characterized in that it further comprises a step for receiving and analyzing the content of the image data to estimate the rate of change of the content of the video data.
  10. 10.根据权利要求6所述的动态背光控制的适应性步进控制方法,其特征在于其中上述的内容为一影像讯框的平均亮度。 10. The adaptive control method of the stepping dynamic backlight control according to claim 6, characterized in that wherein the above-described content information is the average luminance of an image frame.
CN2009101429013A 2009-05-13 2009-05-13 Adaptive stepping-control system and method of dynamic backlight control CN101888726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009101429013A CN101888726A (en) 2009-05-13 2009-05-13 Adaptive stepping-control system and method of dynamic backlight control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009101429013A CN101888726A (en) 2009-05-13 2009-05-13 Adaptive stepping-control system and method of dynamic backlight control

Publications (1)

Publication Number Publication Date
CN101888726A true CN101888726A (en) 2010-11-17

Family

ID=43074385

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101429013A CN101888726A (en) 2009-05-13 2009-05-13 Adaptive stepping-control system and method of dynamic backlight control

Country Status (1)

Country Link
CN (1) CN101888726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105513544A (en) * 2016-02-25 2016-04-20 广州视源电子科技股份有限公司 Dynamic backlight adjustment method and device

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060227125A1 (en) * 2005-03-29 2006-10-12 Intel Corporation Dynamic backlight control
US20070188438A1 (en) * 2006-02-14 2007-08-16 Research In Motion Limited System and method for adjusting a backlight level for a display on an electronic device
US20070279369A1 (en) * 2006-06-02 2007-12-06 Wei Yao Dynamic backlight control system
CN101131505A (en) * 2006-08-21 2008-02-27 Lg.菲利浦Lcd株式会社 Liquid crystal display and driving method thereof
US20080068328A1 (en) * 2006-09-15 2008-03-20 Au Optronics Corp. Apparatus and method for adaptively adjusting backlight
CN101169919A (en) * 2006-10-27 2008-04-30 深圳帝光电子有限公司 LED dynamic backlight control circuit
CN101271208A (en) * 2007-03-19 2008-09-24 钰瀚科技股份有限公司 Dynamic backlight control method of LCD device
US20080266236A1 (en) * 2007-04-26 2008-10-30 Vastview Technology Inc. Driving method of liquid crystal display device having dynamic backlight control unit
US20080284354A1 (en) * 2007-05-16 2008-11-20 Chi Mei Optoelectronics Corp. Light emitting diode backlight module and a driving method thereof
CN101360182A (en) * 2007-07-31 2009-02-04 深圳Tcl工业研究院有限公司 Video image processing method
CN101388178A (en) * 2007-09-11 2009-03-18 奇景光电股份有限公司 Apparatus and method for dynamic backlight-control
US20090086473A1 (en) * 2007-09-28 2009-04-02 Ben Jin Tan Systems and methods for compensating brightness uniformity of backlit image displays
CN101414440A (en) * 2007-10-19 2009-04-22 三星电子株式会社 Adaptive backlight control to reduce flicker by damp

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060227125A1 (en) * 2005-03-29 2006-10-12 Intel Corporation Dynamic backlight control
US20070188438A1 (en) * 2006-02-14 2007-08-16 Research In Motion Limited System and method for adjusting a backlight level for a display on an electronic device
US20070279369A1 (en) * 2006-06-02 2007-12-06 Wei Yao Dynamic backlight control system
CN101131505A (en) * 2006-08-21 2008-02-27 Lg.菲利浦Lcd株式会社 Liquid crystal display and driving method thereof
US20080068328A1 (en) * 2006-09-15 2008-03-20 Au Optronics Corp. Apparatus and method for adaptively adjusting backlight
CN101169919A (en) * 2006-10-27 2008-04-30 深圳帝光电子有限公司 LED dynamic backlight control circuit
CN101271208A (en) * 2007-03-19 2008-09-24 钰瀚科技股份有限公司 Dynamic backlight control method of LCD device
US20080266236A1 (en) * 2007-04-26 2008-10-30 Vastview Technology Inc. Driving method of liquid crystal display device having dynamic backlight control unit
US20080284354A1 (en) * 2007-05-16 2008-11-20 Chi Mei Optoelectronics Corp. Light emitting diode backlight module and a driving method thereof
CN101360182A (en) * 2007-07-31 2009-02-04 深圳Tcl工业研究院有限公司 Video image processing method
CN101388178A (en) * 2007-09-11 2009-03-18 奇景光电股份有限公司 Apparatus and method for dynamic backlight-control
US20090086473A1 (en) * 2007-09-28 2009-04-02 Ben Jin Tan Systems and methods for compensating brightness uniformity of backlit image displays
CN101414440A (en) * 2007-10-19 2009-04-22 三星电子株式会社 Adaptive backlight control to reduce flicker by damp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105513544A (en) * 2016-02-25 2016-04-20 广州视源电子科技股份有限公司 Dynamic backlight adjustment method and device

Similar Documents

Publication Publication Date Title
Seetzen et al. 54.2: A high dynamic range display using low and high resolution modulators
US8400396B2 (en) Liquid crystal display with modulation for colored backlight
KR101089928B1 (en) Management techniques for video playback
JP2007241253A (en) Liquid crystal display device
JP3927011B2 (en) Liquid crystal display device and its driving circuit
CN101305414B (en) Liquid crystal display device
JP4979776B2 (en) Image display device and image display method
KR100750306B1 (en) Liquid crystal display apparatus
US8395577B2 (en) Liquid crystal display with illumination control
CN100358004C (en) Image display apparatus and image display method
US20050248593A1 (en) Liquid crystal display with modulated black point
US8120569B2 (en) Apparatus and method for adaptively adjusting backlight
CN101202023B (en) The liquid crystal display having a backlight area adaptation
US7872631B2 (en) Liquid crystal display with temporal black point
CN100514134C (en) Display device and display control method
US7505018B2 (en) Liquid crystal display with reduced black level insertion
KR101093884B1 (en) Dynamic backlight adaptation
EP2357632A1 (en) Display apparatus, luminance adjusting device, backlight device, luminance adjusting method, and program
JP2006251796A (en) Image display device with reduced flickering and blur
US10199011B2 (en) Generation of tone mapping function for dynamic pixel and backlight control
JP3495362B2 (en) Way video display apparatus and a video display
WO2006060665A2 (en) Methods and systems for display-mode-dependent brightness preservation
CN101345031B (en) Liquid crystal display device and driving method thereof
CN101111882B (en) Wide color gamut displays
CN101151653A (en) Liquid crystal display apparatus

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)