CN1310206C - Multiple light-source driver, liquid crystal displaying device and driving method thereof - Google Patents

Multiple light-source driver, liquid crystal displaying device and driving method thereof Download PDF

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CN1310206C
CN1310206C CN 03120422 CN03120422A CN1310206C CN 1310206 C CN1310206 C CN 1310206C CN 03120422 CN03120422 CN 03120422 CN 03120422 A CN03120422 A CN 03120422A CN 1310206 C CN1310206 C CN 1310206C
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light emitting
liquid crystal
crystal display
according
emitting unit
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CN1530917A (en )
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赵元任
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启萌科技有限公司
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Abstract

一种液晶显示器的驱动方法包含一第一亮度调整步骤、及一第二亮度调整步骤。 A method for driving a liquid crystal display comprising a first step brightness adjustment, brightness adjustment, and a second step. 于第一亮度调整步骤中,调整多个发光单元间的相对亮度,以使这些发光单元于液晶显示器的显示板的显示画面上的亮度分布呈现一暗带(dark zone),该暗带涵盖一被驱动的扫描线所在位置;于第二亮度调整步骤中,当经过一定时序后,重新调整这些发光单元间的相对亮度,使该暗带产生位移,以确保被驱动的另一扫描线所在位置位于该暗带中。 The first step in the brightness adjustment, the adjustment of the relative luminance between the plurality of light emitting units, so that the light emitting elements in the luminance distribution on the display screen of the display panel of a liquid crystal display exhibits a dark band (dark zone), which covers a dark band position of the scanning line to be driven is located; the second luminance adjusting step, when after a certain timing, re-adjust the relative luminance between the light emitting elements, so that the dark band is displaced to ensure that another scan line is driven by the location of It located in the obscuration band. 另外,本发明亦提供一种液晶显示器及一多光源驱动器。 Further, the present invention also provides a liquid crystal display, and more than one light source driver.

Description

多光源驱动器、液晶显示器及其驱动方法 Multi light source driver, a liquid crystal display and a driving method

技术领域 FIELD

本发明关于一种多光源驱动器、液晶显示器及其驱动方法,特别是指一种可在液晶显示器的显示画面上产生一依序移动的暗带(darkzone)的多光源驱动器、液晶显示器及其驱动方法。 The present invention relates to a multi-light source driver, a liquid crystal display and a driving method, particularly to a mobile may generate a sequence of multi-source drive dark bands (darkzone) on a display screen of a liquid crystal display, liquid crystal display and a driving method.

背景技术 Background technique

目前液晶显示器(以下简称LCD)被广泛地运用于计算机等电子产品中,而随着LCD的技术发展,LCD的显示品质越来越高且其尺寸也不断地增大,近年来更朝向应用来作为电视的显示屏幕。 Currently liquid crystal display (hereinafter abbreviated LCD) is widely used in computers and other electronic products, and with the technology of LCD, the LCD display quality and increasing the size thereof is also constantly increasing in recent years toward more applications to as the display-screen TV. 然而,由于电视所播放的影像大多为动画影像(moving picture images),因此当选用LCD来作为显示屏幕时,往往会因为LCD的影像显示方式造成视觉暂留现象,进而产生显示画面模糊(image blurring)等问题。 However, since the television broadcast images mostly animated images (moving picture images), when using the LCD as the display screen therefore elected, often because the image LCD display mode caused by persistence of vision phenomenon, thereby creating display blurring (image blurring )And other issues. 此一问题乃限制LCD在电视显示上的应用,因为传统电视屏幕并不会产生上述问题。 This issue is the application of restrictions on the LCD TV display, because the traditional TV screen and will not have the problems described above.

传统电视屏幕一般采用CRT(cathode ray tube),而CRT的影像显示方式属于脉冲型显示(impulse-type display)方式,因此对于人所产生的视觉效果而言并不会因视觉暂留而产生画面模糊现象。 Generally use traditional TV screen CRT (cathode ray tube), and CRT image display belong to impulse-type display (impulse-type display) mode, so for people to produce visual effects and persistence of vision will not produce the picture Vagueness. 反观,已知的LCD影像显示方式属于持续型显示(hold-type display)方式,该种显示方式在显示动画时,会导致前一画面视觉暂留,进而造成显示画面模糊现象。 In contrast, the known LCD video display of a continuing display (hold-type display) mode, the kind of display when displaying animation, will lead to the previous screen persistence of vision, thus causing display blurring.

有鉴于上述问题,近来乃有业者提出利用闪光(blink)技术来解决画面模糊问题。 In view of the above problems, the industry has made recently is the use of flash (blink) technology to solve the problem of blurred pictures. 闪光技术将作为液晶显示器背光源的多个发光单元间隔性地进行开、关,以使LCD背光源具有闪光效果,据以仿真脉冲型显示(impulse-type display)方式,以达到消除画面模糊的功效。 The flash unit technology intermittently carried out as a plurality of light emitting LCD backlight on and off, so that the LCD backlight includes a glittering effect, been shown (impulse-type display) to simulate a pulse-type manner, in order to eliminate blurring efficacy. 然而,就该种闪光技术而言,由于其不断地将发光单元进行开、关,因此在显示画面的亮度变化幅度很大,此一现象将因此导致出现视觉上的闪烁(flicker)现象。 However, for that type of flash technology, since it will continue to be the light emitting element on and off, thus displaying the magnitude of a large change in luminance of the screen, this phenomenon will thus result in flicker (Flicker) visual phenomena. 再者,不断地将发光单元进行开、关,也会使画面整体亮度下降,进而影响到显示画面的品质。 Further, the light emitting unit constantly opening and closing, will also decrease the overall screen brightness, thereby affecting the quality of the display screen. 除此之外,由于发光单元点灭再点亮时,作为发光单元的灯管的电流变化会经过一段瞬态响应区间(transient),于此区间内将不易精确控制灯管电流及亮度,同时亦不易确保各发光单元间的亮度均匀性。 In addition, due to re-lighting the light emitting unit blinking, changes in the lamp current as a light emitting element will after a period of transient response interval (transient), this interval is not easy to precisely control the lamp current and brightness while also difficult to ensure uniformity of luminance between the respective light emitting units.

承上所述,如何提供一种能在维持一定亮度下,消除模糊现象且避免闪烁现象发生的液晶显示器及其驱动方法实为一重要课题。 The bearing, how to provide a constant luminance while maintaining eliminate blurring and prevent flicker and a driving method of the liquid crystal display phenomenon occurs is indeed a significant problem. 此外,如何提供一种可以在维持一定亮度下,使液晶显示器能消除模糊现象且避免闪烁现象发生的多光源驱动器亦为另一重要课题。 In addition, how to provide a constant luminance can be maintained, the liquid crystal display to eliminate blurring and prevent flicker multi-source drive also another important topic occurs.

发明内容 SUMMARY

有鉴于上述课题,本发明的目的为提供一种可消除模糊现象且避免闪烁现象发生,同时又兼顾亮度的液晶显示器及其驱动方法。 In view of the above problems, an object of the present invention is to provide a blur eliminating and avoiding flicker phenomenon, while taking into account the brightness of a liquid crystal display and a driving method of.

又,本发明的另一目的为提供一种可使液晶显示器消除模糊现象且避免闪烁现象发生,同时又兼顾亮度的多光源驱动器。 Another object of the present invention is to provide a liquid crystal display can eliminate blurring and prevent flicker phenomenon, while taking into account a multi-light source driver luminance.

本发明的一特征是调整作为一液晶显示器背光源的多个发光单元间的相对亮度,以于液晶显示屏幕的显示面上呈现一暗带,并使该暗带涵盖一被驱动的扫描线所在位置;而在经过一定时序后,重新调整所述的发光单元间的相对亮度,以使暗带产生位移,以确保被驱动的另一扫描线所在位置位于该暗带中。 A feature of the present invention is the relative luminance between the plurality of light emitting units as a liquid crystal display to adjust the backlight to the display surface of the liquid crystal display screen presents a dark band, and covered by a dark band in the scan line where the driven position; and after a certain timing, re-adjust the relative luminance between the light emitting unit so that the dark band displacement, is driven to ensure that the location of another scan line located in the obscuration band.

本发明的另一特征是利用一数字控制回路分别产生一组相位可调、占空周期可调的数字切换信号Pia、Pib至一振荡升压回路,以分别控制各振荡升压回路,使各振荡升压回路产生一交流信号,并依据交流信号的电流大小(current level of AC signal)来调整电连接于所述的振荡升压回路的发光单元(冷阴极萤光灯管)的亮度。 Another feature of the invention is the use of a digital control loop generate a set of phase adjustable, variable duty cycle digital switching signals Pia, Pib to an oscillation booster circuit, to control the booster circuit of the oscillation, each oscillation booster circuit generates an AC signal, and based on the current size (current level of AC signal) alternating current signal to adjust the brightness of the light emitting cells is electrically connected to an oscillation booster circuit (cold cathode fluorescent tube).

由此,为达上述目的,依本发明的液晶显示器驱动方法包含一第一亮度调整步骤、及一第二亮度调整步骤。 Accordingly, in order to achieve the above object, a liquid crystal display driving method under this invention comprises a first step of the brightness adjustment, brightness adjustment, and a second step. 于该第一亮度调整步骤中,调整多个发光单元间的相对亮度,以使所述的发光单元于该液晶显示器的显示画面上的亮度分布呈现一暗带,该暗带涵盖一被驱动的扫描线所在位置;于该第二亮度调整步骤中,当经过一定时序后,重新调整所述的发光单元间的相对亮度,使该暗带产生位移,以确保被驱动的另一扫描线所在位置位于该暗带中。 The first step in the brightness adjustment, the adjustment of the relative luminance between the plurality of light emitting unit to the light emitting unit according to the brightness on the display screen of the liquid crystal display distribution presents a dark band, which covers a dark band is driven a scan line location; brightness adjustment in the second step, when after a certain timing, re-adjust the relative luminance between the light emitting unit according to the displacement of the dark band, to ensure that another scan line is driven by the location of It located in the obscuration band.

此外,依本发明的液晶显示器包含一显示板、一显示系统电路、一背光模块、及一多光源驱动器。 Further, the liquid crystal display under this invention comprises a display panel, a display system circuit, a backlight module, and more than one light source driver. 该显示板具有多条扫描线;该显示系统电路与该显示板电连接,其用以控制该显示板,并产生一系统时序信号;该背光模块设于该显示板之后,其具有多个发光单元;而,该多光源驱动器与该背光模块电连接,其产生多个交流信号,所述的交流信号用以分别驱动各发光单元,该多光源驱动器依据该显示系统电路的该系统时序信号来依序调整所述的交流信号的电流大小,而使所述的发光单元的亮度依序变化,以使所述的发光单元于该显示板的显示画面上的亮度分布呈现一涵盖一被驱动的扫描线的暗带。 The display panel has a plurality of scanning lines; the display system connected to the display circuit board, which is used to control the display panel and generating a system timing signal; after the backlight module disposed on the display panel having a plurality of light emitting unit; and, the multi-light source driver electrically connected to the backlight module, that generates a plurality of AC signal to said AC signal drives each light emitting unit, the light source driver according to the multi-system timing signal to the display system circuit sequentially adjusting the magnitude of the alternating current signal, the luminance of the light-emitting unit sequentially changes to cause the light emitting unit according to the brightness on the display screen of the display panel exhibits a distribution of a cover to be driven dark band scan line.

由于依本发明的液晶显示器及其驱动方法于扫描线被驱动时产生一暗带,并使该暗带涵盖该被驱动的扫描线所在位置,因此可以避免因视觉暂留所造成的画面模糊现象。 Because the screen produces a dark band when the liquid crystal display and a driving method under this invention is driven in the scanning line, and the position of the scanning lines dark bands where the cover is driven, due to persistence of vision can be avoided caused blurring . 此外,由于本发明的液晶显示器及其驱动方法在产生暗带时并未完全将亮度降为0,因此可以确保画面亮度不会过低。 Further, since the liquid crystal display and a driving method of the present invention, when a dark band luminance not completely reduced to zero, thereby ensuring that the screen luminance is not low. 另外,由于本发明的液晶显示器及其驱动方法在产生暗带时并非由全亮至全灭,因此亮度变化可以控制在适当的范围内,故不会有闪烁现象产生。 Further, since the liquid crystal display and a driving method of the present invention is not to completely destroyed by the full-band light when a dark, the luminance variation can be controlled within an appropriate range, it will not produce flicker.

此外,依本发明的多光源驱动器包含多个振荡升压回路、及一数字控制回路。 In addition, multiple light sources under this invention comprises a plurality of drive oscillation booster circuit, and a digital control loop. 各振荡升压回路分别产生一交流信号。 Of the oscillation booster circuit generates an alternating current signal, respectively. 该数字控制回路分别与所述的振荡升压回路电连接,并分别产生一组相位可调、占空周期可调的数字切换信号Pia、Pib至各振荡升压回路中,该组数字切换信号Pia、Pib的相位与占空周期由该数字控制回路所控制,各振荡升压回路所产生的交流信号的电流大小依据所输入的该组数字切换信号来调整。 The digital control circuit is connected electrically to the oscillation booster circuit and generate a set of variable phase, variable duty cycle digital switching signals Pia, Pib booster circuit to each of the oscillation, the set of digital switching signal Pia, Pib and the duty cycle of the phase control loop is controlled by this number, the group number based on the size of the input alternating current signal generated by each of the oscillation booster circuit to adjust the switching signal.

由于依本发明的多光源驱动器以数字方式控制来产生复数组相位可调、占空周期可调的数字切换信号,因此,可轻易地调整多个发光单元的相对亮度,以使所述的发光单元于液晶显示屏幕的显示面上的亮度分布呈现一暗带。 Since under this invention is a multi-light source driver to generate a plurality of sets of phase-adjustable, variable duty cycle digital signal digitally controlled switch, thus, can easily adjust the relative brightness of a plurality of light emitting unit to said light emitting luminance distribution in the liquid crystal display unit display surface of the screen presents a dark band. 换言之,利用本发明的多光源驱动器即可产生一涵盖被驱动的扫描线所在位置的暗带,因此可以避免因LCD影像显示方式所造成的画面模糊。 In other words, the present invention is the use of a multi-light source driver to a position of dark band covers the scanning line to be driven is located, so the screen can be avoided by the LCD display image blur caused. 另外,由于本发明的多光源驱动器于驱动时,可以控制发光单元的亮度变化在适当的范围内,故不会有闪烁现象产生。 Further, since the multi-light source driver to drive according to the present invention, the light emitting unit may control the luminance variation is within an appropriate range, it will not produce flicker.

附图说明 BRIEF DESCRIPTION

图1为本发明较佳实施例的液晶显示器驱动方法的方块流程图。 The method of driving a liquid crystal display block preferred embodiment of the present invention. FIG 1 to FIG.

图2为本发明的液晶显示器的扫描线驱动时序与发光单元的亮度的关系说明图。 Relationship between the scanning lines of the liquid crystal display of the present invention, FIG. 2 and the timing of driving the light emitting luminance of the unit described in FIG.

图3为本发明的液晶显示器的扫描线驱动时序与发光单元的亮度的关系的另一说明图。 Another scanning line in FIG. 3 the liquid crystal display of the present invention with the drive timing relationship between the brightness of the light emitting unit described in FIG.

图4为本发明的液晶显示器的方块示意图。 The liquid crystal display of the present invention. FIG. 4 is a block schematic diagram.

图5为本发明较佳实施例的液晶显示器的多光源驱动器的方块示意图。 Multi light source driver preferred embodiment of a liquid crystal display of the present invention. FIG. 5 is a block schematic diagram.

图6为本发明的液晶显示器的多光源驱动器的振荡升压回路的说明图。 FIG 6 is an explanatory view of multi-source oscillation booster circuit drive a liquid crystal display of the invention.

图7(a)及图7(b)为本发明的液晶显示器的多光源驱动器的数字控制回路所产生的数字切换信号的时序说明图。 Multi-series digital light source driver liquid crystal display of FIG. 7 (a) and FIG. 7 (b) of the present invention, the control circuit generated by a digital switching signal described in FIG.

图8为本发明较佳实施例的液晶显示器的多光源驱动器的另一方块示意图。 Is another block schematic diagram of a multi-light source driver preferred embodiment of a liquid crystal display of FIG. 8 of the present invention.

图中符号说明 DESCRIPTION OF REFERENCE NUMERALS

S01 第一亮度调整步骤S02 第二亮度调整步骤S1第1条扫描线Sm第m条扫描线Sn第n条扫描线Li第i个发光单元1 显示板2 显示系统电路3 多光源驱动器31 振荡升压回路311 切换单元312 谐振升压单元3121 变压器3122 电容器32 数字控制回路321 数字切换信号产生回路322 多路反馈控制运算回路4 背光模块9 冷阴极萤光灯管具体实施方式以下将参照相关附图,说明依本发明的液晶显示器驱动方法的较佳实施例。 A first step S02, S01 second brightness adjusting brightness adjustment step S1 first scanning line Sm m-th scan line Sn n-th scan line Li of the i-th unit light-emitting display panel 2 display system 1 over three light source driver circuit 31 liters oscillation pressure circuit 311 the switching unit 312 the resonant step-transformer unit 3121 3122 321 capacitor 32 digital control loop switching signal generating circuit 322 for the digital multiplexed feedback control calculation circuit 4 backlight module 9 cold cathode fluorescent lamps DETAILED eMBODIMENTS hereinafter with reference to the related drawings , a liquid crystal display driving method of the invention under this preferred embodiment. 此在要特别说明的是,在本实施例中,该液晶显示器包含一背光模块、一显示板、及一多光源驱动器(device),该背光模块具有多个发光单元,每一发光单元至少包含一支灯管,亦即每一发光单元可包含两支灯管以上。 This is in particular note, in the present embodiment, the liquid crystal display device comprises a backlight module, a display panel, and more than one light source driver (Device), the backlight module having a plurality of light emitting units, each of the light emitting unit comprises at least a tube, i.e. each light emitting unit may comprise two or more lamps. 而,灯管可为冷阴极萤光灯管(CCFL)。 And, the lamp may be a cold cathode fluorescent tube (CCFL). 该显示板具有多条扫描线。 The display panel has a plurality of scan lines. 此外,于本实施例中,该液晶显示器为TFT-LCD,其背光源为直接式背光源(direct back-light unit)。 Further, in the present embodiment, the liquid crystal display is a TFT-LCD, a direct backlight which backlights (direct back-light unit).

如图1所示,液晶显示器驱动方法包含一第一亮度调整步骤S01、及一第二亮度调整步骤S02。 1, a liquid crystal display driving method comprises a first step S01 brightness adjustment, brightness adjustment, and a second step S02.

于该第一亮度调整步骤S01中,通过一多光源驱动器来调整所述的发光单元间的相对亮度,以使所述的发光单元于该液晶显示器的显示板的显示画面上的亮度分布呈现一暗带(dark zone),该暗带涵盖一被驱动的扫描线所在位置。 In the first brightness adjustment step S01, to adjust the relative luminance between the light emitting unit of the light source by more than one driver, the light emitting unit according to the brightness distribution on the display screen of the liquid crystal display panel exhibits a dark bands (dark zone), the dark band covers a position where the scanning lines are driven. 于本实施例中,在进行该第一亮度调整步骤S01时,可调暗所述的发光单元中的至少一发光单元的亮度,调暗范围介于该发光单元原先亮度的90%以下至0之间,或是介于该发光单元相邻的发光单元亮度的90%以下至0之间。 In the present embodiment, the first performing the brightness adjustment step S01, the luminance of the at least one light emitting unit, the dimming range from the light emitting unit dimmed in 90% of the original brightness of the light emitting unit to the 0 between 90% or between the adjacent light emitting unit to the light emitting unit luminance 0. 该发光单元的亮度调暗可以渐次降低方式调暗,或是以阶梯降低方式调暗。 Adjust the brightness of the light unit may gradually reduce dark dimmed manner or in a stepwise manner to reduce dimmed. 而就该暗带的亮度而言,其至少为该暗带以外区域的亮度的10%者为佳。 For luminance and dark bands in respect of which preferably at least 10% of those for the regions other than the luminance of the dark bands.

于该第二亮度调整步骤S02中,当经过一定时序后,重新调整所述的发光单元间的相对亮度,以使该暗带产生位移,以确保被驱动的另一扫描线所在位置位于该暗带中。 In the second brightness adjustment step S02, the timing when after a certain re-adjust the relative luminance between the light emitting unit, so that the dark bands displaced to ensure that the position of the another scan line to be driven is located where the dark band. 于该第二亮度调整步骤S02中,所谓经一定时序例如依序驱动多条扫描线所需时间。 In the second brightness adjustment step S02, the so-called after a certain timing, for example, a plurality of scanning lines are sequentially driven time required. 而,于该第二亮度调整步骤S02中可将该第一亮度调整步骤中的该发光单元的亮度调亮至原来亮度,并至少调暗所述的发光单元中的另一发光单元的亮度,以使所述的发光单元于该显示板的显示面上的亮度分布呈现位移的暗带。 And, in step S02, the second luminance adjusting the brightness of the light emitting unit may be a first step of adjusting the luminance in the luminance modulation light to the original, and at least another dims the light emitting unit in the light emitting unit, in the light emitting unit in the luminance of the display surface of the display panel displacement distribution presents a dark band. 于本实施例中,该暗带的移动方向与扫描线的扫描位置移动方向一致。 In this embodiment, the same scanning position moving direction of the scanning line direction of the dark bands. 此外,于该第二亮度调整步骤S02中,另一发光单元的亮度调暗范围可介于该发光单元原先亮度的90%以下至0之间,或是介于该发光单元相邻的发光单元亮度的90%以下至0之间。 Further, in the second brightness adjustment step S02, the luminance range dimming another light emitting cell may be 90% between the light emitting unit to the original luminance between 0, or between the light emitting unit of the adjacent light emitting unit brightness of 90% or less to 0. 而就该暗带的亮度而言,其至少为该暗带以外区域的亮度的10%者为佳。 For luminance and dark bands in respect of which preferably at least 10% of those for the regions other than the luminance of the dark bands. 该发光单元的亮度调暗可以渐次降低方式调暗,或是以阶梯降低方式调暗。 Adjust the brightness of the light unit may gradually reduce dark dimmed manner or in a stepwise manner to reduce dimmed.

在此,值得一提的是,当该液晶显示器激活后,则可不断重复该第二亮度调整步骤S02以使该暗带产生位移,以确保正在被驱动的另一扫描线所在位置一直位于该暗带中。 Here, it is worth mentioning that, when the liquid crystal display activation may be repeated the second step S02 to adjust the brightness of the dark band displaced so as to ensure that the location is being driven by another scanning line has been located dark band.

以下将以图2及图3来进一步说明依本发明的液晶显示器驱动方法。 The following FIGS. 2 and 3 will be further described method of driving a liquid crystal display under this invention. 图2及图3中S1~Sn+1表示该液晶显示器的显示板中的部分条扫描线,Li及Li+1分别表示复数发光单元中的两相邻的发光单元。 2 and 3 in S1 ~ Sn + 1 denotes a display panel in the liquid crystal display part of scanning lines, Li and Li + 1 respectively two adjacent light emitting cells in the plurality of light emitting cells.

图2表示该发光单元的亮度调暗以阶梯降低方式调暗的示意图。 Figure 2 shows the brightness of the light emitting unit is adjusted to reduce a schematic manner a stepwise dimmed dark. 图3表示该发光单元的亮度调暗以渐次降低方式调暗的示意图。 Figure 3 shows the luminance of the light emitting unit is adjusted in a schematic manner dimmed gradually decreased dark. 如图2或图3所示,当第1条扫描线S1被驱动前,该发光单元Li的亮度则开始调暗,并在第(1+m)/2条扫描线被驱动前调暗至亮度最低,直至接近第m条扫描线时,该发光单元Li的亮度又开始调亮,此时,即是进入该第二亮度调整步骤S02。 2 or FIG. 3, when the article before the first scan line S1 is driven, Li luminance of the light emitting unit starts dimming, dimming and prior to the first (1 + m) / 2 scanning lines are driven minimum brightness, until near the m-th scanning line, the luminance of the light emitting element Li began to lighten, this time, that is, step S02 enters the second brightness adjustment. 当该发光单元Li的亮度开始调亮时,该发光单元Li+1的亮度则开始调暗,亦即在第m条扫描线被驱动前,该发光单元Li+1的亮度开始调暗。 When the luminance of the light emitting unit starts brighten Li, Li + brightness of the light unit 1 is started dimming, i.e. prior to the m-th scanning line is driven, the luminance of the light emitting element Li + 1 starts dimming. 此时,在画面中的该暗带将会产生位移。 At this time, a dark band on the screen will be displaced. 在此,要特别说明的是,于上述该第二亮度调整步骤S02中,所谓经一定时序例如第1条扫描线S1至第1+q条扫描线的时间,其中1+q≤m,q>0。 Here, to be particularly noted that, in the above-described second brightness adjustment step S02, a so-called timing after a certain time, for example, first scanning lines S1 to the first scan line 1 + q, wherein 1 + q≤m, q > 0.

承上所述,由于本发明的液晶显示器驱动方法于扫描线被驱动时产生一暗带,并使该暗带涵盖该被驱动的扫描线所在位置,因此可以避免因LCD影像显示方式所造成的画面模糊。 Said bearing to produce a dark bands due to the liquid crystal display driving method of the present invention is driven in the scanning line, and the dark band covers positions where the scanning lines are driven can be avoided due to the LCD display image caused by fuzzy picture. 此外,由于本发明的液晶显示器驱动方法在产生暗带时并未完全将亮度降为0,因此可以确保画面亮度不会过低。 Further, since the liquid crystal display driving method according to the present invention, when a dark band luminance not completely reduced to zero, thereby ensuring that the screen luminance is not low. 另外,由于本发明的液晶显示器驱动方法在产生暗带时并非由全亮至全灭,因此亮度变化可以控制在适当的范围内,故不会有闪烁现象产生。 Further, since the liquid crystal display driving method according to the invention is not completely destroyed by the full-band light when a dark, the luminance variation can be controlled within an appropriate range, it will not produce flicker.

以下将依图4~图8来具体说明依本发明的液晶显示器的较佳实施例。 4 to 8 the liquid crystal display will be specifically described below under this invention will depend on the preferred embodiment of FIG.

如图4所示,本发明的液晶显示器包含一显示板1、一显示系统电路2、一多光源驱动器3、及一背光模块4。 4, the liquid crystal display of the present invention comprises a display panel 1, a display system circuit 2, more than one light source driver 3, 4, and a backlight module.

该显示板1具有多条扫描线,在此要特别说明的是,于本实施例中,该显示板1包含有一数据线驱动回路及一扫描线驱动回路(未表示于图中)。 The display panel 1 has a plurality of scanning lines, to be particularly described herein is that, in the present embodiment, the display panel 1 includes a data line driving circuit and a scanning line driving circuit (not shown in the drawing). 显示系统电路2与该显示板1电连接,用以控制该显示板,并产生一系统时序信号至该多光源驱动器3中。 Display system circuit 2 electrically connected to the display panel 1, for controlling the display panel, and generating a system timing signal to the plurality of light source driver 3. 该背光模块4设于该显示板1之后,其具有多个发光单元,于本实施例中,图5所示的冷阴极萤光灯管9即是上述发光单元。 After the module 4 is disposed on the backlight of the display panel 1, having a plurality of light emitting units, in the present embodiment, the cold cathode fluorescent lamp shown in FIG. 5 that is the light emitting means 9. 在此要特别说明的是,图5所示该发光单元由一支灯管构成的情况。 In this particular note, as shown in the case of this light emitting unit constituted by a tube 5 in FIG.

该多光源驱动器3与该背光模块4电连接,其用以产生多个交流信号,所述的交流信号用以分别驱动各发光单元(冷阴极萤光灯管9),该多光源驱动器依据该显示系统电路的该系统时序信号来依序调整所述的交流信号的电流大小(current level of AC signal),而使所述的发光单元的亮度依序变化,以使所述的发光单元于该显示板的显示画面上的亮度分布呈现一涵盖一被驱动的扫描线的暗带。 The multi-light source driver 3 is electrically connected to the backlight module 4, which is for generating a plurality of AC signal to said AC signal drives each light emitting unit (cold cathode fluorescent tubes 9), the multi-light source driver according to the magnitude of the current (current level of AC signal) the system timing signal to sequentially display system circuit of the AC signal is adjusted, the brightness of the light-emitting unit sequentially changes to cause the light emitting unit according to the brightness on the display screen of the display panel with a dark covering distribution presents a scanning line to be driven. 又,如图5所示,本发明的液晶显示器的多光源驱动器3包含多个振荡升压回路31、及一数字控制回路32。 Further, as shown in Figure 5, a multi-light source driver of the liquid crystal display of the present invention 3 comprises a plurality of oscillation booster circuit 31, and a digital control circuit 32.

所述的振荡升压回路31分别产生一交流信号,且分别与该背光模块4的发光单元电连接,该交流信号用以驱动所述的发光单元的一发光单元,并控制该发光单元的亮度。 The oscillation booster circuit 31 generates an AC signal, respectively, and connected electrically to the light emitting unit of the backlight module 4 of the alternating-current signal to a light-emitting unit of the drive unit and controls the brightness of the light emitting unit .

该数字控制回路32分别与所述的振荡升压回路31电连接,并分别产生一组相位可调、占空周期可调的数字切换信号Pia、Pib至各振荡升压回路31中(请参考图6所示),该组数字切换信号Pia、Pib的相位与占空周期由该数字控制回路32所控制。 The digital control circuit 32 respectively of the oscillation boosting circuit 31 is electrically connected, and generate a set of variable phase, variable duty cycle digital switching signals Pia, Pib to each of the oscillation booster circuit 31 (refer to as shown in FIG. 6), the set of digital switching signals Pia, Pib and phase is controlled by the duty cycle of the digital circuit 32 is controlled. 又由图5可知,于本实施例中,该数字控制回路32共输出N组数字切换信号(P1a、P1b~PNa、PNb),且该数字控制回路32依据由该显示系统电路所输入的该系统时序信号来调整各组数字切换信号Pia、Pib的占空周期。 And 5 shows that, in the present embodiment, the digital control circuit 32 common output N sets of digital switching signals (P1a, P1b ~ PNa, PNb), and the digital control circuit of the 32 basis by the display system circuit input the system timing signals to adjust the set of digital switching signals Pia, Pib duty cycle.

如图6所示,各振荡升压回路31包含一切换单元311、及一谐振升压单元312。 6, each of the oscillation booster circuit 31 comprises a switch unit 311, unit 312, and a resonant step. 于本发明的实施例中,该切换单元(switching unit)311包含两极晶体管、及两电阻,其中所述的电阻的一端分别电连接于所述的晶体管的基极,所述的电阻的另一端分别与该数字控制回路32电连接。 In the embodiment of the present invention, the switching unit (switching unit) 311 comprises bipolar transistors and two resistors, wherein said one end of the resistor are electrically connected to the base of the transistor, the other end of the resistor are respectively electrically connected to the digital control circuit 32. 该谐振升压单元312主要由一变压器3121及一电容器3122所构成,其中该电容器3122的两端分别与该切换单元311的两晶体管的集电极电连接,此外,该谐振升压单元312可至少与一冷阴极萤光灯管9(光源)电连接。 The resonant boosting unit 312 is mainly constituted by a transformer 3121 and a capacitor 3122, wherein both ends of the capacitor 3122 are electrically connected to the collector of both transistors of the switching unit 311, in addition, the resonant boosting unit 312 may be at least (light source) is electrically connected to a cold cathode fluorescent tube 9. 在此,值得一提的是,该切换单元311亦可单由两MOS晶体管构成(未示于图),此时,该数字控制回路32所输出的数字切换信号Pia、Pib用以控制这些MOS晶体管的栅极。 Here, it is worth mentioning that, the switch unit 311 may also be composed of two single MOS transistor (not shown in FIG.) In this case, the digital control circuit 32 output a digital switch signal Pia, Pib for controlling the MOS the gate of the transistor.

如图7所示,当本发明的液晶显示器应用上述液晶显示器驱动方法来驱动该冷阴极萤光灯管9时,为使某一冷阴极萤光灯管9的亮度调暗,则可将该数字控制回路32所产生的一组数字切换信号Pia、Pib的占空周期从图7(a)所示的占空周期调整成为图7(b)所示的占空周期。 As shown, when the liquid crystal display of the present invention is applied to the above-described driving method for driving a liquid crystal display 0900 is that the brightness of a cold cathode fluorescent lamp dimming the cold cathode fluorescent tubes 7 tube 9 may be the digital control circuit 32 generates a set of digital switching signals Pia, Pib duty cycle from FIG. 7 (a) adjusting the duty cycle becomes FIG. 7 (b) the duty cycle as shown in FIG. 如此,即可获致图2所示中的发光单元Li的亮度调暗效果。 Thus, to get the effect of dimming the brightness of the light emitting unit 2 shown in FIG actuation of Li. 当然,若欲将图2所示中的发光单元Li的亮度调亮时,则可将该数字控制回路32所产生的一组数字切换信号Pia、Pib的占空周期从图7(b)所示的占空周期调整成为图7(a)所示的占空周期即可。 Of course, when the light emitting element Li To convert from luminance brighten in FIG. 2, the digital control can be a set of numbers generated by the switching circuit 32 signals Pia, Pib duty cycle (b) of FIG. 7 adjusting the duty cycle becomes shown in FIG. 7 (a) can be represented by the duty cycle. 此时,发光单元Li+1的亮度调整亦同样可由另一组数字切换信号P(i+1)a、P(i+1)b来进行。 At this time, the light emitting element Li + 1 is equally luminance adjustment by another set of digital switching signal P (i + 1) a, P (i + 1) b is performed. 此外,如图8所示,该数字控制回路32包含一数字切换信号产生回路321、及一多路反馈控制运算回路322。 Further, as shown in FIG. 8, the digital control circuit 32 comprises a digital switching signal generating circuit 321, and a multiplexer circuit 322 for feedback control calculation.

该数字切换信号产生回路321与各振荡升压回路31电连接,其用以分别产生一组输入各振荡升压回路31中的数字切换信号Pia、Pib。 The digital switching signal generating circuit 321 with an oscillation booster circuit 31 is electrically connected, which is set to generate a digital input of the oscillation boosting circuit 31 in a switching signal Pia, Pib. 该多路反馈控制运算回路322用以控制该数字切换信号产生回路321,并依据各冷阴极萤光灯管9所产生的反馈信号来控制该数字切换信号产生回路321所产生的数字切换信号的占空周期。 The multiplexed feedback control loop 322 to control operation of the digital switching signal generating circuit 321, and a feedback signal according to the respective cold cathode fluorescent tubes 9 generated by the digital control circuit 321 generates a switching signal generated by a digital switching signal duty cycle. 于本实施例中,各冷阴极萤光灯管9的所产生的反馈信号可为电流信号或是电压信号。 Feedback signal generated in the present embodiment, the cold cathode fluorescent tube 9 may be a current signal or voltage signal.

承上所述,由于依本发明的液晶显示器以数字方式控制来产生复数组相位可调、占空周期可调的数字切换信号,因此,可轻易地调整多个发光单元的相对亮度,以使所述的发光单元于该显示板的显示面上的亮度分布呈现一暗带。 The bearing, since under this invention in a liquid crystal display to generate a plurality of digitally controlled adjustable phase group, the duty cycle of the digital adjustable switching signal, therefore, can easily adjust the relative brightness of a plurality of light emitting units, such that the emission luminance of the display unit on the surface of the display panel distribution presents a dark band. 换言之,利用本发明的液晶显示器即可产生一涵盖被驱动的扫描线所在位置的暗带,因此可以避免因LCD影像显示方式所造成的画面模糊。 In other words, a liquid crystal display of the present invention can produce a dark band position covering the scanning line to be driven is located, it can be avoided due to the screen of the LCD display image blur caused. 另外,由于本发明的液晶显示器于驱动时,可以控制发光单元的亮度变化在适当的范围内,故不会有闪烁现象产生。 Further, since the liquid crystal display of the invention at the time of driving the light emitting unit may control the luminance variation is within an appropriate range, it will not produce flicker. 另外,要特别说明的是,于本实施中,本发明的液晶显示器的多光源驱动器虽以数字方式控制来产生复数组相位可调、占空周期可调的数字切换信号,然而,本发明的液晶显示器的多光源驱动器亦可利用模拟控制方式来达成。 Further, special note that, in the present embodiment, a plurality of light source driver of the liquid crystal display of the present invention, although controlled digitally adjustable phase to produce a plurality of groups, the duty cycle of the digital adjustable switching signal, however, the present invention the liquid crystal display of multi-source drive can also be achieved using analog control.

以上是有关本发明的液晶显示器及其驱动方法的详细说明。 The above is a detailed description of a liquid crystal display and a driving method of the present invention. 而,由于本发明的多光源驱动器已于上述实施例中具体说明,为避免赘述,故有关本发明的多光源驱动器详细说明予以省略。 And, since the plurality of light source driver has the above-described embodiments of the present invention is specifically described embodiment, in order to avoid repeated, it is more related to the light source driver of the present invention are not described in detail.

以上所述仅为举例性,而非为限制性者。 The foregoing is merely illustrative and not a limiting sense. 任何未脱离本发明的精神与范畴,而对其进行的等效修改或变更,均应包含于申请专利范围中。 Any without departing from the spirit and scope of the invention, and their equivalent modifications or changes made, should be included in the scope of the patent.

Claims (46)

  1. 1.一种液晶显示器驱动方法,其中该液晶显示器包含一背光模块、一显示板、及一多光源驱动器,该背光模块具有多个发光单元,该显示板具有多条扫描线,其特征在于,该液晶显示器驱动方法包含:一第一亮度调整步骤,采用该多光源驱动器来调整所述的发光单元间的相对亮度,以使所述的发光单元于该显示板的显示画面上的亮度分布呈现一暗带,该暗带涵盖一被驱动的扫描线所在位置;以及一第二亮度调整步骤,当经过一定时序后,重新调整所述的发光单元间的相对亮度,使该暗带于显示画面中产生位移,以确保被驱动的另一扫描线所在位置位于该暗带中。 A method for driving a liquid crystal display, wherein the liquid crystal display device comprises a backlight module, a display panel and a multi-light source driver, the backlight module having a plurality of light emitting units, the display panel having a plurality of scan lines, wherein, the liquid crystal display driving method comprising: a first step of adjusting brightness using the multi-light source driver to adjust the relative luminance between the light emitting unit according to the light emitting unit according to the brightness distribution on the display screen of the display panel exhibits a dark band, which covers a concealed location with a scanning line to be driven; and a second luminance adjusting step, when after a certain timing, re-adjust the relative luminance between the light emitting unit, so that the dark bands on the display screen in displaced to ensure that the position of the another scan line to be driven is located where the dark zone.
  2. 2.如权利要求1所述的液晶显示器驱动方法,其特征在于,该第一亮度调整步骤中,至少调暗所述的发光单元中的一发光单元的亮度,以使所述的发光单元于该显示板的显示画面上的亮度分布呈现一暗带;而于该第二亮度调整步骤中,将该第一亮度调整步骤中的该发光单元的亮度调亮,并至少调暗所述的发光单元中的另一发光单元的亮度,以使显示画面上的暗带产生位移。 The liquid crystal display driving method according to claim 1, wherein the first luminance adjusting step, at least one dims the light emitting unit in the light emitting unit to the light emitting unit according to the brightness on the display screen of the display panel distribution presents a dark band; and in the second step of the brightness adjustment, the brightness of the light emitting unit in a first step of adjusting luminance brighten and dim the luminous least a luminance of another light emitting cell unit to cause the display on the screen with a dark displaced.
  3. 3.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元亮度的调暗范围介于该发光单元原先亮度的90%以下至0之间。 The liquid crystal display driving method according to claim 2, characterized in that the dimming range of the luminance of the light emitting unit between the light emitting unit of 90% or less to the original luminance between 0.
  4. 4.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元亮度的调暗范围介于该发光单元相邻的发光单元亮度的90%以下至0之间。 The liquid crystal display driving method according to claim 2, characterized in that the dimming range of the luminance of the light emitting unit between the light emitting unit 90 percent of adjacent light emitting cells to the luminance 0.
  5. 5.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元调暗后的亮度大于该发光单元原先亮度的10%。 The liquid crystal display driving method according to claim 2, wherein the brightness of the light emitting unit dimmed more than 10% of the original brightness of the light emitting unit.
  6. 6.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元调暗后的亮度大于相邻发光单元亮度的10%。 The liquid crystal display driving method according to claim 2, wherein the brightness of the light emitting unit is greater than the adjacent light emitting unit dimmed brightness of 10%.
  7. 7.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元的亮度调暗以渐次降低方式调暗。 The liquid crystal display driving method according to claim 2, wherein the light emitting element brightness adjustment is dark in a manner dimmed gradually decreased.
  8. 8.如权利要求2所述的液晶显示器驱动方法,其特征在于,该发光单元的亮度调暗以阶梯降低方式调暗。 8. A liquid crystal display driving method according to claim 2, wherein the dark brightness adjustment of the light emitting unit to reduce stepwise dimming manner.
  9. 9.如权利要求2所述的液晶显示器驱动方法,其特征在于,该第二亮度调整步骤中将该第一亮度调整步骤中的该发光单元的亮度调亮至原来亮度。 9. A method of driving a liquid crystal display as claimed in claim 2, characterized in that, in the second step of the brightness adjusting luminance of the light emitting unit in a first step of adjusting brightness to lighten original luminance.
  10. 10.如权利要求1所述的液晶显示器驱动方法,其特征在于,该发光单元至少包含一支灯管。 10. A liquid crystal display driving method according to claim 1, wherein the light emitting unit comprises at least one tube.
  11. 11.如权利要求10所述的液晶显示器驱动方法,其特征在于,该灯管为冷阴极萤光灯管。 11. A method of driving a liquid crystal display as claimed in claim 10, characterized in that the lamp is a cold cathode fluorescent tube.
  12. 12.如权利要求1所述的液晶显示器驱动方法,其特征在于,该暗带的亮度至少为该暗带以外区域的亮度的10%。 12. A liquid crystal display driving method according to claim 1, wherein the luminance of the dark band with at least 10% of the luminance of the dark region other than that.
  13. 13.一种液晶显示器,其包含一显示板,具有多条扫描线;一显示系统电路,与该显示板电连接,用以控制该显示板,并产生一系统时序信号;一背光模块,设于该显示板之后,其具有多个发光单元;一多光源驱动器,与该背光模块电连接,其产生多个交流信号,所述的交流信号用以分别驱动各发光单元,其特征在于,该多光源驱动器依据该显示系统电路的该系统时序信号来依序调整所述的交流信号的电流大小,而使所述的发光单元的亮度依序变化,以使所述的发光单元于该显示板的显示画面上的亮度分布呈现一涵盖一被驱动的扫描线的暗带。 A liquid crystal display comprising a display panel having a plurality of scanning lines; a display system circuit is electrically connected to the display panel, for controlling the display panel, and generating a system timing signal; a backlight module, provided later than the display panel having a plurality of light emitting units; more than one light source driver, electrically connected to the backlight module, that generates a plurality of AC signal to said AC signal drives each light emitting unit, characterized in that the multi light source driver to sequentially adjust the magnitude of the alternating current signal according to the system timing signal circuit of the display system, the brightness of the light-emitting unit sequentially changes to cause the light emitting unit according to the display panel the brightness of the display on the display screen covered with a dark distribution presents a scanning line to be driven.
  14. 14.如权利要求13所述的液晶显示器,其特征在于,该多光源驱动器先至少调整所述的交流信号中的一交流信号的电流大小,据以调整其所对应的发光单元的亮度,再经过一定时序后,将原先调整的交流信号的电流大小调亮,并将调整下一次的一交流信号的电流大小,据以调整该下一次的一交流信号所对应的发光单元的亮度,以使显示画面上的该暗带产生位移。 14. The liquid crystal display according to claim 13, wherein the multi-light source driver to adjust at least a magnitude of the current of the AC signal is an AC signal, according to adjust the brightness of its corresponding light-emitting unit, and then after a certain timing, the magnitude of the current adjustment of the original AC signal brighter, and adjusting the magnitude of the current time to an alternating current signal, the data to adjust the brightness of a light emitting unit corresponding to an AC signal, so that displayed on the screen with a dark displaced.
  15. 15.如权利要求14所述的液晶显示器,其特征在于,该发光单元亮度的调暗范围介于该发光单元原先亮度的90%以下至0之间。 15. The liquid crystal display according to claim 14, characterized in that the dimming range of the luminance of the light emitting unit between the light emitting unit of 90% or less to the original luminance between 0.
  16. 16.如权利要求14所述的液晶显示器,其特征在于,该发光单元亮度的调暗范围介于该发光单元相邻的发光单元亮度的90%以下至0之间。 16. The liquid crystal display according to claim 14, characterized in that the dimming range of the luminance of the light emitting unit of the light emitting unit is between 90% adjacent light emitting cells to the luminance between 0.
  17. 17.如权利要求14所述的液晶显示器,其特征在于,该发光单元调暗后的亮度大于该发光单元原先亮度的10%。 17. The liquid crystal display according to claim 14, characterized in that the brightness after the light emitting unit dimmed more than 10% of the original brightness of the light emitting unit.
  18. 18.如权利要求14所述的液晶显示器,其特征在于,该发光单元调暗后的亮度大于相邻发光单元亮度的10%。 18. The liquid crystal display according to claim 14, characterized in that the brightness after the light emitting unit is greater than the adjacent light emitting unit dimmed brightness of 10%.
  19. 19.如权利要求14所述的液晶显示器,其特征在于,该发光单元的亮度调暗以渐次降低方式调暗。 19. The liquid crystal display according to claim 14, wherein the light emitting element brightness adjustment gradually decreased in a dark way dimming.
  20. 20.如权利要求14所述的液晶显示器,其特征在于,该发光单元的亮度调暗以阶梯降低方式调暗。 20. The liquid crystal display according to claim 14, wherein the dark brightness adjustment of the light emitting unit to reduce stepwise dimming manner.
  21. 21.如权利要求14所述的液晶显示器,其特征在于,该发光单元的亮度调亮至原来亮度。 21. The liquid crystal display according to claim 14, wherein the brightness of the light emitting unit is adjusted to the original luminance.
  22. 22.如权利要求13所述的液晶显示器,其特征在于,该暗带的亮度至少为该暗带以外区域亮度的10%。 22. The liquid crystal display according to claim 13, characterized in that, with the brightness of the dark for at least 10% of the area other than the luminance dark bands.
  23. 23.如权利要求13所述的液晶显示器,其特征在于,该发光单元至少包含一支灯管。 23. A liquid crystal display according to claim 13, wherein the light emitting unit comprises at least one tube.
  24. 24.如权利要求23所述的液晶显示器,其特征在于,该灯管为冷阴极萤光灯管。 24. A liquid crystal display according to claim 23, characterized in that the lamp is a cold cathode fluorescent tube.
  25. 25.如权利要求13所述的液晶显示器,其特征在于,该多光源驱动器包含:多个振荡升压回路,分别产生一交流信号,且分别与该背光模块的发光单元电连接;及一数字控制回路,分别与所述的振荡升压回路电连接,并分别产生一组数字切换信号至各振荡升压回路中,各组数字切换信号的相位与占空周期分别由该数字控制回路所控制,各振荡升压回路所产生的交流信号的电流大小依据所输入的该组数字切换信号来调整。 And a number; a plurality of oscillation booster circuit, generates an AC signal, respectively, and are electrically connected to the light emitting element of the backlight module: 25. The liquid crystal display according to claim 13, wherein the light source driver comprises a multi- a control circuit, connected electrically to the oscillation booster circuit and generating a switching signal to each of the set of digital oscillation booster circuit, respectively, the duty cycle of each phase of the digital sets are controlled by the switching signal of the digital loop controlled , the set of digital input alternating current signal based on the size of each of the generated oscillation booster circuit to adjust the switching signal.
  26. 26.如权利要求25所述的液晶显示器,其特征在于,该数字控制回路依据来自该显示系统电路的系统时序信号来调整各组数字切换信号的占空周期。 26. A liquid crystal display according to claim 25, wherein the digital control circuit system according to a timing signal from the display system circuitry to adjust the duty cycle of each set of digital switching signals.
  27. 27.如权利要求25所述的液晶显示器,其特征在于,该各振荡升压回路包含一切换单元、及一谐振升压单元,其中该切换单元与该数字控制回路电连接,该切换单元依据该数字控制回路所输出的该组数字切换信号来进行开关,并通过开关动作来控制该谐振升压单元。 27. A liquid crystal display according to claim 25, wherein each of the oscillation booster circuit comprises a switching unit and a resonant step-up unit, wherein the switching unit is connected electrically to the digital control circuit, according to the switch unit the digital output from the control loop of the set of digital switching signal to switch and the resonant step-up means to control switching operation.
  28. 28.如权利要求27所述的液晶显示器,其特征在于,该谐振升压单元包含一变压器及一电容器。 28. The liquid crystal display according to claim 27, wherein the resonance unit comprises a step-up transformer and a capacitor.
  29. 29.如权利要求28所述的液晶显示器,其特征在于,该切换单元包含两晶体管,所述的晶体管分别电连接于该电容器的一端,所述的晶体管分别依据该组数字切换信号来进行开、关。 29. The liquid crystal display according to claim 28, wherein the switching unit comprises two transistors, said transistors are electrically connected to one end of the capacitor, the transistors are switched according to the set of digital signals to be opened ,turn off.
  30. 30.如权利要求29所述的液晶显示器,其特征在于,该切换单元的晶体管为MOS晶体管。 30. A liquid crystal display according to claim 29, wherein the transistor switching means is a MOS transistor.
  31. 31.如权利要求29所述的液晶显示器,其特征在于,该切换单元的晶体管为双极晶体管。 31. The liquid crystal display according to claim 29, wherein the transistor switching means is a bipolar transistor.
  32. 32.如权利要求31所述的液晶显示器,其特征在于,该切换单元更包含两电阻,其中所述的电阻的一端分别电连接于各晶体管的基极,所述的电阻的另一端分别与该数字控制回路电连接。 32. A liquid crystal display according to claim 31, wherein the switching unit further comprising two resistors, wherein said one end of the resistor are electrically connected to the base of each transistor, the other end of the resistor are respectively the digital control circuit is electrically connected.
  33. 33.如权利要求25所述的液晶显示器,其特征在于,该数字控制回路包含:一数字切换信号产生回路,与各振荡升压回路电连接,其用以分别产生输入各振荡升压回路中的该组数字切换信号;及一多路反馈控制运算回路,其用以控制该数字切换信号产生回路,并依据各发光单元所产生的反馈信号来控制该数字切换信号产生回路所产生的数字切换信号的占空周期。 33. The liquid crystal display according to claim 25, wherein the digital control circuit comprises: a digital switching signal generating circuit, connected to each oscillating electric booster circuit that generates the input of the oscillation for each of the booster circuit the set of digital switching signal; and a multiple loop feedback control calculation, which is used to control the digital switching signal generating circuit, and each light unit according to a feedback signal generated to control the digital switching signal generating circuit produced a digital switch duty cycle signal.
  34. 34.如权利要求33所述的液晶显示器,其特征在于,该反馈信号为电流信号。 34. The liquid crystal display according to claim 33, wherein the feedback signal is a current signal.
  35. 35.如权利要求33所述的液晶显示器,其特征在于,该反馈信号为电压信号。 35. The liquid crystal display according to claim 33, wherein the feedback signal is a voltage signal.
  36. 36.一种多光源驱动器,用以驱动复数发光单元,并控制所述的发光单元的亮度,其特征在于,包含:多个振荡升压回路,分别产生一交流信号,该交流信号用以驱动所述的发光单元的一发光单元,并控制该发光单元的亮度;及一数字控制回路,分别与所述的振荡升压回路电连接,并分别产生一组数字切换信号至各振荡升压回路中,各组数字切换信号的相位与占空周期分别由该数字控制回路所控制,各振荡升压回路所产生的交流信号的电流大小依据所输入的该组数字切换信号来调整。 36. A multi-light source driver for driving a plurality of light emitting unit, and controls the brightness of the light emitting unit, characterized in that, comprising: a plurality of oscillation booster circuit, generate an AC signal of the AC signal to drive a light emitting unit of the light emitting unit, and controls the brightness of the light emitting element; and a digital control loop, an oscillation booster circuit is connected electrically and generating a switching signal to each of the set of digital oscillation booster circuit, respectively , each set of digital switching phase and the duty cycle of the signal are controlled by the digital loop control, the set of digital input alternating current signal based on the size of each of the generated oscillation booster circuit to adjust the switching signal.
  37. 37.如权利要求36所述的多光源驱动器,其特征在于,该数字控制回路依据来自外部的一显示系统电路的系统时序信号来调整各组数字切换信号的占空周期。 Said plurality of light source driver 36 as claimed in claim 37., wherein, the digital control loop system circuit system according to the timing signal from the outside a display to adjust the duty cycle of each set of digital switching signals.
  38. 38.如权利要求36所述的多光源驱动器,其特征在于,各振荡升压回路包含一切换单元、及一谐振升压单元,其中该切换单元与该数字控制回路电连接,该切换单元依据该数字控制回路所输出的该组数字切换信号来进行开关,并通过开关动作来控制该谐振升压单元。 38. The multi-light source driver according to claim 36, wherein each of the oscillation booster circuit comprises a switching unit and a resonant step-up unit, wherein the switching unit is connected electrically to the digital control circuit, according to the switch unit the digital output from the control loop of the set of digital switching signal to switch and the resonant step-up means to control switching operation.
  39. 39.如权利要求38所述的多光源驱动器,其特征在于,该谐振升压单元包含一变压器及一电容器。 Said plurality of light source driver 38 as claimed in claim 39., wherein the resonance unit comprises a step-up transformer and a capacitor.
  40. 40.如权利要求39所述的多光源驱动器,其特征在于,该切换单元包含两晶体管,所述的晶体管分别电连接于该电容器的一端,所述的晶体管分别依据该组数字切换信号来进行开、关。 40. The multi-light source driver according to claim 39, wherein the switching unit comprises two transistors, said transistors are electrically connected to one end of the capacitor, the transistor according to the respective set of digital signals to the switching switch.
  41. 41.如权利要求40所述的多光源驱动器,其特征在于,该切换单元的晶体管为MOS晶体管。 41. The multi-light source driver according to claim 40, wherein the transistor switching means is a MOS transistor.
  42. 42.如权利要求40所述的多光源驱动器,其特征在于,该切换单元的晶体管为双极晶体管。 42. The multi-light source driver according to claim 40, wherein the transistor switching means is a bipolar transistor.
  43. 43.如权利要求42所述的多光源驱动器,其特征在于,该切换单元更包含两电阻,其中所述的电阻的一端分别电连接于各晶体管的基极,所述的电阻的另一端分别与该数字控制回路电连接。 43. The multi-light source driver according to claim 42, wherein the switching unit further comprising two resistors, wherein said one end of the resistor are electrically connected to the base of each transistor, the other end of the resistor respectively, connected electrically to the digital control loop.
  44. 44.如权利要求36所述的多光源驱动器,其特征在于,该数字控制回路包含:一数字切换信号产生回路,与各振荡升压回路电连接,其用以分别产生输入各振荡升压回路中的该组数字切换信号;及一多路反馈控制运算回路,其用以控制该数字切换信号产生回路,并依据各发光单元所产生的反馈信号来控制该数字切换信号产生回路所产生的数字切换信号的占空周期。 44. The multi-light source driver according to claim 36, wherein the digital control circuit comprises: a digital switching signal generating circuit, connected to each oscillating electric booster circuit that generates the input for each of the oscillation booster circuit in the set of digital switching signal; and a multiple loop feedback control calculation, which is used to control the digital switching signal generating circuit, and each light unit according to a feedback signal generated to control the digital switching signal generating circuit produced a digital the duty cycle of the switching signal.
  45. 45.如权利要求44所述的多光源驱动器,其特征在于,该反馈信号为电流信号。 45. The multi-light source driver according to claim 44, wherein the feedback signal is a current signal.
  46. 46.如权利要求44所述的多光源驱动器,其特征在于,该反馈信号为电压信号。 46. ​​The multi-light source driver according to claim 44, wherein the feedback signal is a voltage signal.
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