TWI406262B - Liquid crystal display and method and apparatus for controlling backlight module thereof - Google Patents

A liquid crystal display (LCD) and a method and an apparatus for controlling a backlight module thereof are disclosed. The method includes the following steps. Firstly, detecting and obtaining the state of pixels within an LCD panel. Afterwards, regulating the originally intensity of face light source supplied by the backlight module so as to make the decided target gray level of the pixels fast at least achieving according to a brightness compensation value, which is corresponding to a pixel owned the highest target gray level in the pixels, looked up by a compensation lookup table when the liquid crystal of the pixel(s) is/are situated in a first transient state.

液晶顯示器及其背光模組控制方法與裝置Liquid crystal display and backlight module control method and device thereof

本發明是有關於一種液晶顯示器及其背光模組控制裝置與方法，且特別是有關於一種液晶顯示器及其不需加大畫素跨壓而能致使畫素之目標灰階提早達到的背光模組控制裝置與方法。The invention relates to a liquid crystal display and a backlight module control device and method thereof, and particularly relates to a liquid crystal display and a backlight module capable of causing an early gray scale of a pixel to be achieved without increasing the cross-pressure of a pixel. Group control device and method.

隨著光電與半導體技術的演進，所以帶動了平面顯示器之蓬勃發展，而在諸多平面顯示器中，液晶顯示器因具有高空間利用效率、低消耗功率、無輻射以及低電磁干擾等優越特性，隨即已成為市場之主流。液晶顯示器一般包括面板與背光模組，而由於面板本身並不具備自發光的特性，因此必須將背光模組配置在面板下方，藉以提供面板所需之面光源，如此液晶顯示器才能顯示影像給使用者觀看。With the evolution of optoelectronics and semiconductor technology, the development of flat panel displays has been promoted. In many flat panel displays, liquid crystal displays have superior characteristics such as high space utilization efficiency, low power consumption, no radiation and low electromagnetic interference. Become the mainstream of the market. The liquid crystal display generally includes a panel and a backlight module. Since the panel itself does not have self-illuminating characteristics, the backlight module must be disposed under the panel to provide a surface light source required for the panel, so that the liquid crystal display can display images for use. Watch.

然而，由於現今面板之畫素的液晶分子之反應速度皆不夠快之緣故，所以當畫素之液晶分子未達到穩態之前(亦即畫素之液晶分子未轉到其所對應之畫素電壓的角度)就點亮背光模組的話，此時便會造成液晶顯示器所顯示的影像畫面產生拖影(motion blur)。也亦因如此，習知為了要解決此現象，一般都會在畫素之液晶分子達到穩態之時，才會將背光模組點亮來藉以提供面板所需的面光源，但如此一來便會壓縮背光模組於一畫面期間被點亮的時間，進而衍生出液晶顯示器所顯示的影像畫面之亮度不足 的問題。However, since the reaction speed of the liquid crystal molecules of the panel of the current panel is not fast enough, when the liquid crystal molecules of the pixels do not reach the steady state (that is, the liquid crystal molecules of the pixels are not transferred to their corresponding pixel voltages. If the backlight module is lit, the image blur displayed on the liquid crystal display will cause motion blur. For this reason, in order to solve this phenomenon, in general, when the liquid crystal molecules of the pixels reach the steady state, the backlight module is illuminated to provide the surface light source required for the panel, but this is the case. The time during which the backlight module is illuminated during one screen is compressed, thereby deriving the insufficient brightness of the image displayed by the liquid crystal display The problem.

故基於上述，若要同時解決上述影像畫面之拖曳與亮度不足之問題的話，習知技術已發展出一種過驅動(over driving)的方法來驅動面板的各畫素，藉以來同時解決上述影像畫面之拖曳與亮度不足的問題。而簡單來說，習知過驅動的方法就是加大畫素跨壓(亦即縮短畫素之液晶分子的反應時間)，藉以致使畫素之目標灰階提早達到的一種技術。Therefore, based on the above, in order to simultaneously solve the problem of the drag and the lack of brightness of the above-mentioned image picture, the prior art has developed an over-driving method to drive each pixel of the panel, thereby simultaneously solving the above-mentioned image picture. The problem of dragging and insufficient brightness. To put it simply, the conventional method of driving is to increase the pixel cross-pressure (that is, to shorten the reaction time of the liquid crystal molecules of the pixels), so that the target gray scale of the pixel is reached early.

然而，雖然習知過驅動的方法可以同時解決上述影像畫面之拖曳與亮度不足的問題，但由於現今每一種類之液晶分子(例如：OCB、TN...等)的光電特性並不一致，所以針對不同種類之液晶分子的畫素所設計的過驅動方法也會隨之不同。舉例來說，針對OCB型之液晶分子的畫素所設計的過驅動方法並不能適用於針對TN型或其他類型之液晶分子的畫素所設計的過驅動方法，而此等因素便會喪失設計全面適用性之目的。However, although the conventional driving method can simultaneously solve the problem of dragging and insufficient brightness of the above-mentioned image picture, since the photoelectric characteristics of each type of liquid crystal molecules (for example, OCB, TN, etc.) are not uniform, The overdrive method designed for the pixels of different kinds of liquid crystal molecules will also be different. For example, the overdrive method designed for the pixels of OCB type liquid crystal molecules cannot be applied to the overdrive method designed for the pixels of TN type or other types of liquid crystal molecules, and these factors will lose the design. The purpose of full applicability.

本發明的目的就是提供一種液晶顯示器及其背光模組控制裝置與方法，其藉由特殊的調節機制來控制背光模組，並且於畫素之液晶分子尚處於暫態時就點亮背光模組，如此即可達到同時解決液晶顯示器所顯示之影像畫面的拖曳與亮度不足之問題的目的，且更具設計全面適用性。The object of the present invention is to provide a liquid crystal display and a backlight module control device and method thereof, which control a backlight module by a special adjustment mechanism, and illuminate the backlight module when the liquid crystal molecules of the pixel are still in a transient state. In this way, the problem of at the same time solving the problem of insufficient drag and brightness of the image displayed by the liquid crystal display can be achieved, and the design is fully applicable.

基於上述及其所欲達成之目的，本發明提出一種背光模組控制方法，其包括下列步驟：首先，檢知一面板之畫 素的狀態。接著，當所述畫素的液晶分子處於第一暫態時，依據所述畫素中擁有最高之目標灰階者，而於一補償查找表中查找出其所對應的亮度補償值，並據以來調節背光模組原先供應至面板的面光源強度，藉以致使所述畫素快速達到既定的目標灰階。Based on the foregoing and the objects to be achieved, the present invention provides a backlight module control method, which includes the following steps: First, detecting a picture of a panel The state of prime. Then, when the liquid crystal molecules of the pixel are in the first transient state, according to the pixel having the highest target gray scale, the corresponding brightness compensation value is found in a compensation lookup table, and according to The intensity of the surface light source originally supplied to the panel by the backlight module has been adjusted, so that the pixel quickly reaches a predetermined target gray level.

於本發明的一實施例中，本發明所提出的背光模組控制方法更包括下列步驟：當所述畫素的液晶分子處於穩態時，將背光模組供應至面板的面光源強度恢復至其原先供應的狀態。In an embodiment of the present invention, the backlight module control method of the present invention further includes the following steps: when the liquid crystal molecules of the pixel are in a steady state, the surface light source intensity of the backlight module supplied to the panel is restored to The state of its original supply.

於本發明的一實施例中，本發明所提出的背光模組控制方法更包括下列步驟：當所述畫素的液晶分子處於第二暫態之前，致使背光模組不供應任何面光源給面板。In an embodiment of the present invention, the backlight module control method of the present invention further includes the following steps: when the liquid crystal molecules of the pixels are in a second transient state, the backlight module does not supply any surface light source to the panel. .

於本發明的一實施例中，檢知面板之畫素的狀態之步驟包括：透過查找一狀態查找表來得知所述畫素的狀態，其中此狀態查找表係依據所述畫素之液晶分子的特性與其目標灰階間的關係而建立。In an embodiment of the invention, the step of detecting the state of the pixel of the panel comprises: knowing the state of the pixel by searching a state lookup table, wherein the state lookup table is based on the liquid crystal molecule of the pixel The relationship between its characteristics and its target grayscale is established.

從另一觀點來看，本發明提供一種背光模組控制裝置，其包括檢知單元與控制單元。其中，檢知單元用以檢知面板之畫素的狀態。控制單元耦接檢知單元與背光模組，用以當檢知單元檢知所述畫素的液晶分子處於第一暫態時，控制單元會依據所述畫素中擁有最高之目標灰階者，而於一補償查找表中查找出其所對應的亮度補償值，並據以來調節背光模組原先供應至面板的面光源強度，藉以致使所述畫素至少達到既定的目標灰階。From another point of view, the present invention provides a backlight module control device including a detection unit and a control unit. The detecting unit is configured to detect the state of the pixels of the panel. The control unit is coupled to the detecting unit and the backlight module, and when the detecting unit detects that the liquid crystal molecules of the pixel are in the first transient state, the control unit may have the highest target gray scale according to the pixel. And finding a corresponding brightness compensation value in a compensation look-up table, and adjusting the intensity of the surface light source originally supplied to the panel by the backlight module, so that the pixel reaches at least a predetermined target gray level.

於本發明的一實施例中，當檢知單元檢知所述畫素的液晶分子處於穩態時，控制單元會將背光模組供應至面板的面光源強度恢復至其原先供應的狀態。In an embodiment of the invention, when the detecting unit detects that the liquid crystal molecules of the pixel are in a steady state, the control unit restores the intensity of the surface light source supplied to the panel by the backlight module to the state of its original supply.

於本發明的一實施例中，當檢知單元檢知所述畫素的液晶分子處於第二暫態之前，控制單元會致使背光模組不供應任何面光源給面板。In an embodiment of the invention, the control unit causes the backlight module to not supply any surface light source to the panel before the detecting unit detects that the liquid crystal molecules of the pixel are in the second transient state.

於本發明的一實施例中，檢知單元會透過查找一狀態查找表來得知所述畫素的狀態，其中此狀態查找表係依據所述畫素之液晶分子的特性與其目標灰階間的關係而建立。In an embodiment of the invention, the detecting unit knows the state of the pixel by searching a state lookup table, wherein the state lookup table is based on the characteristics of the liquid crystal molecules of the pixel and the target gray scale. Established by relationship.

於上述本發明的一實施例中，所述補償查找表用以紀錄每一畫素之目標灰階值所對應的亮度補償值，且調節背光模組原先供應至面板的面光源強度之方式為增強背光模組原先供應至面板的面光源強度。In an embodiment of the present invention, the compensation lookup table is configured to record a brightness compensation value corresponding to a target grayscale value of each pixel, and adjust a surface light source intensity originally supplied to the panel by the backlight module. Enhance the intensity of the surface light source that the backlight module originally supplied to the panel.

再從另一觀點來看，本發明提供一種液晶顯示器，其包括用以顯示影像畫面的面板、用以提供面板所需之面光源的背光模組，以及本發明用以控制背光模組的控制裝置於其中。From another point of view, the present invention provides a liquid crystal display including a panel for displaying an image frame, a backlight module for providing a surface light source required for the panel, and the control of the backlight module of the present invention. The device is in it.

本發明所提出的背光模組控制裝置與方法主要是藉由當施加畫素電壓至畫素之液晶分子，且此畫素之液晶分子還處於暫態時就點亮背光模組，並且以增強背光模組所供應之面光源強度的方式來致使畫素之目標灰階提早達到。藉此，本發明所提出的背光模組控制裝置與方法不但可以有效地解決液晶顯示器所顯示之影像畫面的拖曳，且更不 需考慮畫素之液晶分子的種類，所以可以達到設計全面適用性之目的。The backlight module control device and method proposed by the invention mainly illuminate the backlight module by applying a pixel voltage to the liquid crystal molecules of the pixel, and the liquid crystal molecules of the pixel are still in a transient state, and are enhanced The intensity of the surface light source supplied by the backlight module is such that the target gray scale of the pixel is reached early. Therefore, the backlight module control device and method provided by the present invention can effectively solve the dragging of the image displayed by the liquid crystal display, and It is necessary to consider the types of liquid crystal molecules of the pixels, so that the purpose of design comprehensive applicability can be achieved.

再者，由於背光模組於畫素之液晶分子還處於暫態時就被點亮，所以背光模組於一畫面期間被點亮的時間就會比較足夠，如此本發明所提供的液晶顯示器之影像畫面的亮度就會足夠於傳統需於畫素之液晶分子處於穩態後才點亮背光模組的液晶顯示器之影像畫面的亮度。Furthermore, since the backlight module is illuminated when the liquid crystal molecules of the pixel are still in a transient state, the backlight module is illuminated during a picture period, so that the liquid crystal display provided by the present invention is The brightness of the image frame is sufficient to illuminate the brightness of the image of the liquid crystal display of the backlight module after the liquid crystal molecules of the pixel are in a steady state.

為讓本發明之上述和其他目的、特徵和優點能更明顯易懂，下文特舉幾個實施例，並配合所附圖式，作詳細說明如下。The above and other objects, features, and advantages of the present invention will become more apparent and understood.

本發明所欲達成的技術目的就是為了要同時解決液晶顯示器所顯示之影像畫面的拖曳(motion blur)與亮度不足之問題，進而達到設計全面適用性之目的，但所實行的技術手段並非以傳統過驅動之方法來實現之。而以下內容將係針對本案之技術特徵來做一詳加描述，藉以提供給本發明相關領域之技術人員參詳。The technical aim of the present invention is to solve the problem of motion blur and insufficient brightness of the image displayed on the liquid crystal display, thereby achieving the overall applicability of the design, but the technical means implemented are not conventional. Overdrive method to achieve it. The following content will be described in detail for the technical features of the present invention, and will be provided to those skilled in the related art of the present invention.

圖1繪示為本發明一實施例之液晶顯示器100的系統方塊圖。請參照圖1，液晶顯示器100包括用以顯示影像畫面的面板(panel)101、用以提供面光源給面板101的背光模組(backlight module)103、背光模組控制裝置105、時序控制器(timing controller,T－con)107、閘極驅動器(gate driver)109，以及源極驅動器(source driver)111。其中，閘極驅動器109受控於時序控制器107，藉以輸出掃描訊 號(scan signal)來逐一開啟面板101內的每一列畫素(未繪示)FIG. 1 is a block diagram of a system of a liquid crystal display 100 according to an embodiment of the invention. Referring to FIG. 1 , the liquid crystal display 100 includes a panel 101 for displaying an image frame, a backlight module 103 for providing a surface light source to the panel 101 , a backlight module control device 105 , and a timing controller ( Timing controller, T-con) 107, gate driver 109, and source driver 111. Wherein, the gate driver 109 is controlled by the timing controller 107 for outputting the scan signal. Scan signal to open each column of pixels in panel 101 one by one (not shown)

源極驅動器111亦受控於時序控制器107，藉以提供對應的畫素電壓(或謂資料電壓)給面板101內被閘極驅動器109開啟的列畫素。背光模組控制裝置105耦接背光模組103，用以控制背光模組103的點亮與否，且此背光模組控制裝置105包括檢知單元105a與控制單元105b，其中檢知單元105a用以檢知面板101之畫素的狀態。The source driver 111 is also controlled by the timing controller 107 to provide a corresponding pixel voltage (or data voltage) to the column pixels in the panel 101 that are turned on by the gate driver 109. The backlight module control device 105 is coupled to the backlight module 103 for controlling the lighting of the backlight module 103. The backlight module control device 105 includes a detecting unit 105a and a control unit 105b, wherein the detecting unit 105a is used. The state of the pixels of the panel 101 is detected.

一般而言，面板101之畫素於一畫面期間的狀態大致可分為三種狀態。其一為第一暫態，也就是當源極驅動器111提供畫素電壓至面板101之畫素時，面板101之畫素的液晶分子開始轉動但並未轉到其該有之角度的狀態；其二為穩態，也就是面板101之畫素的液晶分子大致已轉到其該有之角度的狀態；其三為第二暫態，也就是面板101之畫素的液晶分子欲回復至其關閉之狀態。In general, the state of the pixels of the panel 101 during a picture can be roughly divided into three states. The first transient state, that is, when the source driver 111 supplies the pixel voltage to the pixel of the panel 101, the liquid crystal molecules of the pixels of the panel 101 start to rotate but do not go to the angled state thereof; The second is steady state, that is, the liquid crystal molecules of the pixels of the panel 101 have roughly turned to their angled state; the third is the second transient state, that is, the liquid crystal molecules of the pixels of the panel 101 are intended to be restored to The status of the shutdown.

於本實施例中，檢知單元105a會透過查找一狀態查找表(未繪示)來得知面板101之畫素的狀態，其中此狀態查找表主要是依據面板101內畫素之液晶分子的特性與其目標灰階間的關係而建立。更清楚來說，假設面板101之畫素的最高灰階解析度為8位元(亦即面板101之畫素可以呈現0~255灰階，但不限制於此)，且面板101之畫素的液晶分子為OCB型液晶分子(不限制於此類型的液晶分子)的話，本實施例可以透過實驗的方式先將每一目標灰階施加至具有OCB型液晶分子之畫素經過多少時間所 呈現的各種狀態予以記錄之，如此即可建立上述的狀態查找表。In this embodiment, the detecting unit 105a knows the state of the pixel of the panel 101 by searching a state lookup table (not shown), wherein the state lookup table is mainly based on the characteristics of the liquid crystal molecules of the pixels in the panel 101. The relationship between the target gray levels is established. More specifically, it is assumed that the highest grayscale resolution of the pixels of the panel 101 is 8 bits (that is, the pixels of the panel 101 can exhibit 0 to 255 gray scales, but are not limited thereto), and the pixels of the panel 101 are If the liquid crystal molecules are OCB type liquid crystal molecules (not limited to this type of liquid crystal molecules), this embodiment can experimentally apply each target gray scale to the pixels having OCB type liquid crystal molecules. The various states of the presentation are recorded so that the state lookup table described above can be established.

也亦因如此，當時序控制器107依據其所接收的影像資料(image data)而控制源極驅動器111提供畫素電壓至面板101之畫素的同時，時序控制器107亦會提供相應的資訊給檢知單元105a知曉，所以檢知單元105a才能據以於事先所建立的狀態查找表查找並得知面板101之畫素的狀態。於本實施例中，上述狀態查找表可以儲存在檢知單元105a的內部，或者獨立於液晶顯示器100的系統當中，但皆不限制於此。Also, when the timing controller 107 controls the source driver 111 to provide the pixel voltage to the pixels of the panel 101 according to the received image data, the timing controller 107 also provides corresponding information. It is known to the detecting unit 105a, so that the detecting unit 105a can find and know the state of the pixels of the panel 101 based on the state lookup table established in advance. In the embodiment, the state lookup table may be stored in the inside of the detecting unit 105a or in a system independent of the liquid crystal display 100, but is not limited thereto.

請繼續參照圖1，控制單元105b會耦接至檢知單元105a與背光模組103，用以當檢知單元105a檢知面板101之畫素的液晶分子處於第一暫態時，依據面板101之畫素中擁有最高之目標灰階者，而於一補償查找表中查找出其所對應的亮度補償值，並據以來調節背光模組103原先供應至面板101的面光源強度，藉以致使面板101之畫素至少達到既定的目標灰階。Continuing to refer to FIG. 1 , the control unit 105 b is coupled to the detecting unit 105 a and the backlight module 103 for detecting the liquid crystal molecules of the pixels of the panel 101 in the first transient state according to the panel 101 when the detecting unit 105 a detects that the liquid crystal molecules of the pixels of the panel 101 are in the first transient state. The pixel has the highest target gray scale, and finds the corresponding brightness compensation value in a compensation lookup table, and adjusts the intensity of the surface light source originally supplied to the panel 101 by the backlight module 103, thereby causing the panel The pixels of 101 at least reach the established target gray level.

於本實施例中，所述補償查找表主要是用以紀錄每一畫素之目標灰階值所對應的亮度補償值，且控制單元105b調節背光模組103原先供應至面板101的面光源強度之方式為增強背光模組103原先供應至面板101的面光源強度。於此先值得一提的是，由於畫素之液晶分子處於第一暫態時，其並未轉到其該有的角度，所以此時若背光模組103還是供應原有面光源強度時，可輕易推知的是，畫素 並不會達到其所欲呈現的目標灰階之亮度。In the embodiment, the compensation lookup table is mainly used to record the brightness compensation value corresponding to the target gray level value of each pixel, and the control unit 105b adjusts the intensity of the surface light source originally supplied to the panel 101 by the backlight module 103. The way is to enhance the intensity of the surface light source originally supplied to the panel 101 by the backlight module 103. It is worth mentioning that, since the liquid crystal molecules of the pixels are in the first transient state, they are not turned to their angles. Therefore, if the backlight module 103 supplies the intensity of the original surface light source, It can be easily inferred that the pixel It does not reach the brightness of the target gray level that it wants to present.

也亦因如此，本實施例可透過實驗的方式先將每一目標灰階值於其畫素之液晶分子處於第一暫態之期間需提升多少背光模組103之面光源強度的大小才能致使其畫素呈現既定之目標灰階的亮度予以記錄之，並據以來當作其所對應的亮度補償值，如此即可建立上述的補償查找表，且此補償查找表亦可儲存在控制單元105b的內部，或者獨立於液晶顯示器100的系統當中，但皆不限制於此。For this reason, in this embodiment, the amount of the light source intensity of the backlight module 103 can be increased by the amount of the light source of each of the target gray scales during the first transient state. The pixel is recorded as the brightness of the target gray level, and is regarded as the corresponding brightness compensation value, so that the above compensation lookup table can be established, and the compensation lookup table can also be stored in the control unit 105b. The inside is either independent of the system of the liquid crystal display 100, but is not limited thereto.

舉例來說，當某一畫素欲呈現50灰階之亮度時，此畫素之液晶分子於其第一暫態所轉動的角度必定不會轉到其該有的角度。換言之，畫素之液晶分子於其第一暫態所轉動的角度可能落於0~49灰階的轉動角度，所以當畫素之液晶分子於其第一暫態所轉動的角度例如為0灰階的轉動角度時，此時背光模組103所提升的面光源強度應該為最大，藉以致使背光模組103提升過後的面光源強度搭配0灰階的轉動角度之等效灰階即可達到50灰階。For example, when a certain pixel wants to exhibit a brightness of 50 gray levels, the angle at which the liquid crystal molecules of the pixel rotate in their first transient state must not go to their respective angles. In other words, the angle at which the liquid crystal molecules of the pixels rotate in their first transient state may fall at a rotation angle of 0 to 49 gray scales, so that the angle at which the liquid crystal molecules of the pixels rotate in their first transient state is, for example, 0 gray. At the rotation angle of the step, the intensity of the surface light source raised by the backlight module 103 should be the maximum, so that the intensity of the surface light source after the backlight module 103 is lifted can be matched with the equivalent gray scale of the rotation angle of the 0 gray scale to reach 50. Grayscale.

類推之，當畫素之液晶分子於其第一暫態所轉動的角度例如為30灰階的轉動角度時，此時背光模組103所提升的面光源強度就不需強於0灰階之轉動角度所提升的面光源強度，但背光模組103提升過後的面光源強度搭配30灰階的轉動角度之等效灰階依然可以達到50灰階。再者，當畫素之液晶分子於其第一暫態所轉動的角度例如為49灰階的轉動角度時，此時背光模組103所提升的面光源強度就不需強於30灰階之轉動角度所提升的面光源強度，但 背光模組103提升過後的面光源強度搭配49灰階的轉動角度之等效灰階仍然可以達到50灰階。Similarly, when the angle of the liquid crystal molecules of the pixel in the first transient state is, for example, a rotation angle of 30 gray scales, the intensity of the surface light source raised by the backlight module 103 does not need to be stronger than the gray scale. The intensity of the surface light source increased by the rotation angle, but the equivalent gray scale of the backlight source 103 after the lifted surface light source intensity and the rotation angle of the 30 gray scale can still reach 50 gray scale. Furthermore, when the angle of rotation of the liquid crystal molecules of the pixel in the first transient state is, for example, a rotation angle of 49 gray scales, the intensity of the surface light source raised by the backlight module 103 is not required to be stronger than 30 gray scales. The angle of light is increased by the angle of rotation, but The equivalent gray scale of the brightness of the surface light source after the backlight module 103 is upgraded with the gray angle of the 49 gray scale can still reach 50 gray scale.

故基於上述可知，面板101之畫素的液晶分子處於其第一暫態時，控制單元105b調節背光模組103原先供應至面板101的面光源強度之方式即為增強背光模組103原先供應至面板101的面光源強度，但背光模組103所增強的面光源強度會逐漸遞減之。另外，為了要讓面板101之畫素的液晶分子可以在於其處於第一暫態時就至少達到既定的目標灰階，控制單元105b就必須以面板101之畫素中擁有最高之目標灰階者為依據，如此才能達到此目的。Therefore, based on the above, when the liquid crystal molecules of the pixels of the panel 101 are in their first transient state, the control unit 105b adjusts the intensity of the surface light source originally supplied to the panel 101 by the backlight module 103, that is, the original backlight module 103 is supplied to the enhanced backlight module 103. The surface light source intensity of the panel 101, but the intensity of the surface light source enhanced by the backlight module 103 is gradually reduced. In addition, in order for the liquid crystal molecules of the pixels of the panel 101 to reach at least a predetermined target gray level when they are in the first transient state, the control unit 105b must have the highest target gray scale among the pixels of the panel 101. Based on this, this can be achieved.

除此之外，當檢知單元105a檢知面板101之畫素的液晶分子處於穩態時(亦即面板101之畫素的液晶分子大致已轉到該有的角度)，此時控制單元105b就會將背光模組103供應至面板101的面光源強度恢復至其原先供應的狀態。再者，當檢知單元105a檢知面板101之畫素的液晶分子處於第二暫態之前(亦即面板101之畫素的液晶分子欲回復至其關閉之狀態)，控制單元105b即便會致使背光模組103不供應任何面光源給面板101。In addition, when the detecting unit 105a detects that the liquid crystal molecules of the pixels of the panel 101 are in a steady state (that is, the liquid crystal molecules of the pixels of the panel 101 have substantially turned to the angle), the control unit 105b at this time. The surface light source supplied to the panel 101 by the backlight module 103 is restored to its original supply state. Furthermore, when the detecting unit 105a detects that the liquid crystal molecules of the pixels of the panel 101 are in the second transient state (that is, the liquid crystal molecules of the pixels of the panel 101 are to be returned to the closed state), the control unit 105b may cause even The backlight module 103 does not supply any surface light source to the panel 101.

圖2繪示為本發明一實施例之背光模組103所供應之面光源強度與面板101之畫素的液晶分子間的對應示意圖。請合併參照圖1及圖2，當閘極驅動器109輸出掃描訊號至面板101時，源極驅動器111會提供畫素電壓給相應的畫素，從而使得接收畫素電壓之畫素的液晶分子於一畫面期間便會經歷第一暫態、穩態以及第二暫態的三種狀 態。FIG. 2 is a schematic diagram showing the correspondence between the intensity of the surface light source supplied by the backlight module 103 and the liquid crystal molecules of the pixels of the panel 101 according to an embodiment of the present invention. Referring to FIG. 1 and FIG. 2, when the gate driver 109 outputs a scan signal to the panel 101, the source driver 111 supplies a pixel voltage to the corresponding pixel, so that the liquid crystal molecules receiving the pixel voltage of the pixel are During the picture period, it will experience three kinds of first transient, steady state and second transient. state.

從圖2所揭露的圖示應可輕易看出，當畫素之液晶分子於其第一暫態的期間，背光模組103供應至面板101的面光源強度會增強，且增強的面光源強度會逐漸遞減之，直到畫素之液晶分子於其穩態的期間時，背光模組103供應至面板101的面光源強度才會恢復至其原先供應的狀態。It can be easily seen from the illustration disclosed in FIG. 2 that the intensity of the surface light source supplied to the panel 101 by the backlight module 103 is enhanced while the liquid crystal molecules of the pixels are in their first transient state, and the intensity of the surface light source is enhanced. It will gradually decrease until the liquid crystal molecules of the pixels are in their steady state period, and the intensity of the surface light source supplied to the panel 101 by the backlight module 103 will return to its original supply state.

最後，當畫素之液晶分子於其第二暫態之前的期間，背光模組103就不供應任何面光源給面板101，如此即可使得面板101每於兩個畫面期間就顯示一個黑畫面，而此動作亦等效於現今畫面插黑的技術，藉此即可更有效率地趨緩液晶顯示器100所顯示之影像的拖曳(motion blur)現象。Finally, when the liquid crystal molecules of the pixels are in front of the second transient state, the backlight module 103 does not supply any surface light source to the panel 101, so that the panel 101 displays a black screen every two frames. This action is also equivalent to the technique of black insertion of the current picture, whereby the motion blur phenomenon of the image displayed by the liquid crystal display 100 can be more effectively slowed down.

基於上述所揭示的內容可知，本實施例所述及的背光模組控制裝置105不但可以有效地解決液晶顯示器100所顯示之影像的拖曳現象，且其更可以克服傳統需於畫素之液晶分子處於穩態後才點亮背光模組的液晶顯示器之影像畫面亮度不足的問題。據此，本實施例即能同時解決傳統液晶顯示器所顯示之影像畫面的拖曳(motion blur)與亮度不足之問題，且解決的技術手段並非以傳統過驅動之方法來達到。因此，本實施例所提出的解決方式更可以達到設計全面適用性的目的。Based on the above disclosure, the backlight module control device 105 of the present embodiment can effectively solve the drag phenomenon of the image displayed by the liquid crystal display 100, and can overcome the traditional liquid crystal molecules required for pixels. The problem that the brightness of the image of the liquid crystal display that illuminates the backlight module is insufficient after being in a steady state. Accordingly, the present embodiment can simultaneously solve the problem of motion blur and insufficient brightness of the image displayed by the conventional liquid crystal display, and the technical solution is not achieved by the conventional overdrive method. Therefore, the solution proposed by the embodiment can achieve the purpose of comprehensive design applicability.

再者，依據上述實施例所揭露的內容，以下將彙整出一種背光模組控制方法給本發明領域具有通識者參詳。圖 3繪示為本發明一實施例之背光模組控制方法的流程圖。請參照圖3，本實施例之背光模組控制方法包括下列步驟：首先，如步驟S301所述，檢知一面板之畫素的狀態。於本實施例中，檢知面板之畫素的狀態主要是透過查找一狀態查找表來得知所述畫素的狀態，其中此狀態查找表係依據所述畫素之液晶分子的特性與其目標灰階間的關係而建立。Furthermore, in accordance with the disclosure of the above embodiments, a backlight module control method will be summarized below for the general knowledge of the field of the invention. Figure 3 is a flow chart showing a method for controlling a backlight module according to an embodiment of the present invention. Referring to FIG. 3, the backlight module control method of this embodiment includes the following steps: First, as described in step S301, the state of a panel of a panel is detected. In this embodiment, the state of the pixel of the panel is detected mainly by searching a state lookup table, wherein the state lookup table is based on the characteristics of the liquid crystal molecules of the pixel and its target gray. Established by the relationship between the steps.

更清楚來說，假設面板之畫素的最高灰階解析度為8位元(亦即面板之畫素可以呈現0~255灰階，但不限制於此)，且面板之畫素的液晶分子為TN型液晶分子(不限制於此類型的液晶分子)的話，本實施例可以透過實驗的方式先將每一目標灰階施加至具有TN型液晶分子之畫素經過多少時間所呈現的各種狀態予以記錄之，如此即可建立上述的狀態查找表。More specifically, it is assumed that the highest grayscale resolution of the panel's pixels is 8 bits (that is, the panel's pixels can represent 0 to 255 grayscale, but not limited to this), and the panel's pixel liquid crystal molecules In the case of a TN type liquid crystal molecule (not limited to this type of liquid crystal molecule), the present embodiment can experimentally apply each target gray scale to various states exhibited by the pixel having the TN type liquid crystal molecule. Record it so that the above state lookup table can be established.

緊接著，如步驟S303所述，當所述畫素的液晶分子處於第一暫態時，依據所述畫素中擁有最高之目標灰階者，而於一補償查找表中查找出其所對應的亮度補償值，並據以來調節背光模組原先供應至面板的面光源強度，藉以致使所述畫素至少達到既定的目標灰階。於本實施例中，所述補償查找表用以紀錄每一畫素之目標灰階值所對應的亮度補償值，且調節背光模組原先供應至面板的面光源強度之方式為增強背光模組原先供應至面板的面光源強度。Then, as described in step S303, when the liquid crystal molecules of the pixel are in the first transient state, according to the highest target gray scale in the pixel, the corresponding lookup table is found in the compensation lookup table. The brightness compensation value, and the intensity of the surface light source originally supplied to the panel by the backlight module is adjusted accordingly, so that the pixel reaches at least a predetermined target gray level. In this embodiment, the compensation lookup table is used to record the brightness compensation value corresponding to the target grayscale value of each pixel, and the method for adjusting the intensity of the surface light source originally supplied to the panel by the backlight module is the enhanced backlight module. The intensity of the surface source originally supplied to the panel.

更清楚來說，本實施例可透過實驗的方式先將每一目 標灰階值於其畫素之液晶分子處於第一暫態之期間需提升多少背光模組之面光源強度的大小才能致使其畫素呈現既定之目標灰階的亮度予以記錄之，並據以來當作其所對應的亮度補償值，如此即可建立上述的補償查找表。More specifically, this embodiment can firstly use each method in an experimental manner. The gray scale value of the liquid crystal molecules in the pixel during the first transient state needs to increase the intensity of the surface light source of the backlight module in order to cause the pixel to display the brightness of the target gray scale, and since then As the corresponding brightness compensation value, the above compensation lookup table can be established.

再者，於本實施例中，當所述畫素的液晶分子處於穩態時，將背光模組供應至面板的面光源強度恢復至其原先供應的狀態，並且當所述畫素的液晶分子處於第二暫態之前，致使背光模組不供應任何面光源給面板，藉以來執行插黑畫面之技術。Furthermore, in the embodiment, when the liquid crystal molecules of the pixel are in a steady state, the intensity of the surface light source supplied to the panel of the backlight module is restored to the state of its original supply, and when the liquid crystal molecules of the pixel are Before the second transient state, the backlight module does not supply any surface light source to the panel, and the technology of inserting the black screen is performed.

綜上所述，本發明所提出的背光模組控制裝置與方法主要是藉由當施加畫素電壓至畫素之液晶分子，且此畫素之液晶分子還處於暫態時就點亮背光模組，並且以增強背光模組所供應之面光源強度的方式來致使畫素之目標灰階提早達到。藉此，本發明所提出的背光模組控制裝置與方法不但可以有效地解決液晶顯示器所顯示之影像畫面的拖曳，且更不需考慮畫素之液晶分子的種類，所以可以達到設計全面適用性之目的。In summary, the backlight module control apparatus and method proposed by the present invention mainly illuminate the backlight mode by applying a pixel voltage to the liquid crystal molecules of the pixel, and the liquid crystal molecules of the pixel are still in a transient state. The group and the enhanced intensity of the surface light source supplied by the backlight module are used to cause the target gray scale of the pixel to be reached earlier. Therefore, the backlight module control device and method provided by the invention not only can effectively solve the dragging of the image displayed by the liquid crystal display, but also does not need to consider the type of liquid crystal molecules of the pixels, so that the design comprehensive applicability can be achieved. The purpose.

再者，由於背光模組於畫素之液晶分子還處於暫態時就被點亮，所以背光模組於一畫面期間被點亮的時間就會比較足夠，如此本發明所提供的液晶顯示器之影像畫面的亮度就會足夠於傳統需於畫素之液晶分子處於穩態後才點亮背光模組的液晶顯示器之影像畫面的亮度。Furthermore, since the backlight module is illuminated when the liquid crystal molecules of the pixel are still in a transient state, the backlight module is illuminated during a picture period, so that the liquid crystal display provided by the present invention is The brightness of the image frame is sufficient to illuminate the brightness of the image of the liquid crystal display of the backlight module after the liquid crystal molecules of the pixel are in a steady state.

雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and those skilled in the art, without departing from the spirit of the invention And the scope of protection of the present invention is defined by the scope of the appended claims.

100‧‧‧液晶顯示器100‧‧‧LCD display

101‧‧‧面板101‧‧‧ panel

103‧‧‧背光模組103‧‧‧Backlight module

105‧‧‧背光模組控制裝置105‧‧‧Backlight module control device

105a‧‧‧檢知單元105a‧‧‧Detection unit

105b‧‧‧控制單元105b‧‧‧Control unit

107‧‧‧時序控制器107‧‧‧Timing controller

109‧‧‧閘極驅動器109‧‧‧gate driver

111‧‧‧源極驅動器111‧‧‧Source Driver

S301、S303‧‧‧本發明一實施例之背光模組控制方法的流程圖各步驟S301, S303‧‧‧ steps of the flow chart of the backlight module control method according to an embodiment of the present invention

圖1繪示為本發明一實施例之液晶顯示器100的系統方塊圖。FIG. 1 is a block diagram of a system of a liquid crystal display 100 according to an embodiment of the invention.

圖2繪示為本發明一實施例之背光模組103所供應之面光源強度與面板101之畫素的液晶分子間的對應示意圖。FIG. 2 is a schematic diagram showing the correspondence between the intensity of the surface light source supplied by the backlight module 103 and the liquid crystal molecules of the pixels of the panel 101 according to an embodiment of the present invention.

圖3繪示為本發明一實施例之背光模組控制方法的流程圖。3 is a flow chart of a method for controlling a backlight module according to an embodiment of the invention.

100‧‧‧液晶顯示器100‧‧‧LCD display

101‧‧‧面板101‧‧‧ panel

103‧‧‧背光模組103‧‧‧Backlight module

105‧‧‧背光模組控制裝置105‧‧‧Backlight module control device

105a‧‧‧檢知單元105a‧‧‧Detection unit

105b‧‧‧控制單元105b‧‧‧Control unit

107‧‧‧時序控制器107‧‧‧Timing controller

109‧‧‧閘極驅動器109‧‧‧gate driver

111‧‧‧源極驅動器111‧‧‧Source Driver