201003611 九、發明說明： • 【發明所屬之技術領域】 本發明係有關於一種背光模組之驅動方法及應用，特 別是有關於用以減少色偏影響之背光模組的驅動方法及在 顯示裝置上的應用。 【先前技術】 隨著資訊、通信產業不斷地推陳出新，帶動了液晶顯 示器（Liquid Crystal Display ; LCD)市場的蓬勃發展。液晶 顯示器具有高畫質、體積小、重量輕、低驅動訊號、與低 消耗功率等優點’因此被廣泛應用於個人數位助理 (Personal Digital Assistant; PDA)、行動電話、攝錄放影機、 筆記型電腦、桌上型顯示器、車用顯示器、及投影電視等 消費性通訊或電子產品。加上積體電路（Integrated Circuit ; 1C)產業與液晶顯示器製造技術的突飛猛進，這些消費性通 訊或電子產品亦朝向輕、薄、短、小的趨勢發展。尤其是 在電腦產品方面，除了高性能、高速度之桌上型電腦外， 攜帶方便的筆記型電腦更是受到極大的注意與重視。 目前市場上常見之液晶顯示器大部分為背光型液晶顯 示器’這類的液晶顯示器一般主要係由前端之液晶顯示面 板以及後端之背光模組所組成。因此，背光模組為液晶顯 不器中相當關鍵之零組件之一。背光模組可依照光源入射 4置的不同77成側光式入光（Edge Lighting)與直下式入光 (Bottom Lighting)兩種，通常係運用於各種資訊、通訊、消 5 201003611 費產品之中，藉以提供上述產品的液晶顯示器一面光源。 習知的背光模組常使用之光源例如有：冷陰極螢光燈 管（Cold Cathode Fluorescent Lamp; CCFL)、熱陰極螢光燈 (Hot Cathode Fluorescent Lamp ; HCFL)、發光二極體 (Light-Emitting Diode ; LED)、平面螢光燈（Flat Fluorescent Lamp ; FFL)或電激發光元件（Electro-Luminescence ; EL) 等，由於冷陰極螢光燈管及熱陰極螢光燈等線光源之體積 較大，因此一般的手持示電子產品遂採用體積較小的發光 二極體、電激發光元件等點光源作為液晶顯示器的自發性 的光源。 然而，當使用上述光源來應用於液晶顯示器時，背光 模組的發光容易隨著使用時間而產生色偏的情形，此色偏 情形主要係背光模組在剛啟動時之背光的色度明顯不同於 背光模組在使用一段時間後的色度，亦即背光模組背光的 色度在啟動時和使用穩定後具有不一致的情形。以LED的 背光光源為例，近來的研究發現，LED的色度與其内部的 接面溫度（Junction Temperature)有大的相關性，且由於LED 在剛啟動時與穩定後的介面溫度分別不同，造成LED光源 的色度在剛啟動時與穩定後具有色偏情形。 因此，在背光模組使用一段時間後，使用者可明顯地 感受到液晶顯示器具有明顯的前後色度不一致，而嚴重影 響液晶顯示器的顯示效果和品質。 【發明内容】 6 201003611 因此，本發明之一方面係在於提供一種背光模組的驅 動方法及其應用，藉以縮短背光模組其色偏的歷程時間， 因而可降低人眼料色偏的感知情形，減少、色偏對於顯示 效果的影響’並確保顯示效果和品質。 根據本發明之實施例，此背光模組之驅動方法至少包 含：提供驅動訊號，其中驅動訊號具有驅動波形，且驅動 波形至少包含點燈區間和工作區間。點燈區間係用以允許201003611 IX. Description of the invention: • Technical field of the invention The present invention relates to a driving method and application of a backlight module, and more particularly to a driving method for a backlight module for reducing the influence of color shift and a display device Application on. [Prior Art] With the continuous innovation of the information and communication industry, the market for liquid crystal display (LCD) has been booming. LCD monitors have the advantages of high image quality, small size, light weight, low drive signal, and low power consumption. Therefore, they are widely used in Personal Digital Assistant (PDA), mobile phones, video recorders, and notes. Consumer communications or electronic products such as computers, desktop displays, automotive displays, and projection televisions. Coupled with the rapid advancement of the integrated circuit (1C) industry and liquid crystal display manufacturing technology, these consumer communications or electronic products are also moving toward light, thin, short and small trends. Especially in computer products, in addition to high-performance, high-speed desktop computers, portable notebooks are greatly concerned and valued. Most of the liquid crystal displays currently on the market are backlight type liquid crystal displays. Liquid crystal displays such as the liquid crystal display panels of the front end are generally composed of a liquid crystal display panel at the front end and a backlight module at the rear end. Therefore, the backlight module is one of the most critical components in the liquid crystal display. The backlight module can be used according to different angles of the light source incident, such as Edge Lighting and Bottom Lighting. It is usually used in various information, communication, and consumer products. To provide a light source for the liquid crystal display of the above products. Commonly used light sources for backlight modules are, for example, Cold Cathode Fluorescent Lamp (CCFL), Hot Cathode Fluorescent Lamp (HCFL), and Light-Emitting (Light-Emitting). Diode; LED), Flat Fluorescent Lamp (FFL) or Electro-Luminescence (EL), etc., due to the large volume of line sources such as cold cathode fluorescent tubes and hot cathode fluorescent lamps Therefore, a general hand-held display electronic product uses a small-sized light source such as a light-emitting diode or an electroluminescence element as a spontaneous light source of the liquid crystal display. However, when the above-mentioned light source is used for the liquid crystal display, the illumination of the backlight module is prone to color shift with the use time. This color shift is mainly caused by the fact that the backlight of the backlight module is significantly different when it is just started. The chromaticity of the backlight module after being used for a period of time, that is, the chromaticity of the backlight of the backlight module is inconsistent at the time of startup and after the use is stabilized. Taking the backlight source of LED as an example, recent studies have found that the chromaticity of the LED has a large correlation with its internal junction temperature, and since the LED is different at the start-up and the stable interface temperature, The chromaticity of the LED light source has a color shift when it is started and stabilized. Therefore, after the backlight module is used for a period of time, the user can clearly feel that the liquid crystal display has obvious inconsistency in color before and after, which seriously affects the display effect and quality of the liquid crystal display. SUMMARY OF THE INVENTION 6 201003611 Therefore, an aspect of the present invention is to provide a driving method of a backlight module and an application thereof, thereby shortening the process time of the color shift of the backlight module, thereby reducing the perception of the color shift of the human eye. , reduce the effect of color shift on the display effect 'and ensure the display effect and quality. According to an embodiment of the invention, the driving method of the backlight module at least includes: providing a driving signal, wherein the driving signal has a driving waveform, and the driving waveform includes at least a lighting interval and a working interval. Lighting interval is allowed
背光模組開始點亮。工作區間係用以維持背光模組進行發 光，其中在點燈區間内之驅動訊號的準位或工作週期（加^The backlight module starts to light up. The working area is used to maintain the backlight module to emit light, and the driving signal level or duty cycle in the lighting interval (plus ^
Cycle)# H質馬於在卫作區間内之驅動訊號的準位或工作 週d，以及使用驅動讯號來驅動背光模組進行運作。 又，根據本發明之實施例，此背光模組的驅動訊號具 有驅動波形，其中驅動波形至少包含點燈區間和工作區 間。點燈區間係用以允許背光模組開始點亮。工作區間係 用以維持背光模組進行發光，其中在點燈區間内之驅動訊 就的準位或工作週期係實質高於在卫作區間内之驅動訊號 的準位或工作週期。 t據本發明之實施例，此背光模組之驅動方法至 3 S供驅動Λ號來驅動背光模組；在點燈區間中， 提升驅動訊號的準位或 ^ , 飞作週期，以允許背光模組開始點 免，以及當驅動旬缺山, 0 、 ° 點燈區間進入工作區間時，降低驅 動訊號的準位或工作调 ' 下巧/月，以維持背光模組進行發光。 又，根據本發明之眘 曰— Μ / 只知例，上述背光模組係設置於液 晶顯不模組的下方，藓 稽u形成一液晶顯示裝置。 7 201003611 因此本發明之背光模紐之驅動方法及其應用可在在短 時間内迅速地提升光源的溫度至穩定的工作溫度，以減少 背光模組在使用中前後色度不一致的情形，因而減少色偏 對於顯示效果的影響。 【實施方式】 請參照第1圖和第2圖，第1圖係繪示依照本發明之 第一實施例之背光模組之驅動方法的驅動波形示意圖，第2 圖係繪示依照本發明第一實施例之背光模組和液晶顯示模 組的正面示意圖。本實施例之背光模組的驅動方法係利用 一具有驅動波形100的驅動訊號來驅動背光模組200進行 運作，本實施例之背光模組200可為側光式入光（Edge Lighting)與直下式入光（Bottom Lighting)背光模組，其相對 於液晶顯示模組300設置，藉以提供光線201至液晶顯示 模組300 ’並形成一液晶顯示裝置（Liquid Crystal Display ; LCD)。其中背光模組200的光源（未繪示）例如為：冷陰極 螢光燈管（Cold Cathode Fluorescent Lamp ; CCFL)、熱陰極 螢光燈（Hot Cathode Fluorescent Lamp ; HCFL)、發光二極 體（Light-Emitting Diode ; LED)、有機發光二極體（Organic Light Emitting Diode ; OLED)、電激發光元件 (Electro-Luminescence ; EL)或平面螢光燈（Flat Fluorescent Lamp ; FFL)。 值得注意的是，當使用背光模組200來提供背光源時， 背光模組200之光源的溫度變化會影響背光模組200的光 8 201003611 色欠化因此，隨著背光模組200之使用時間的增加，背 光模組鳩本身的溫度㈣之提高，導致背光模組200產 ^色偏情形’亦即背光模組的色度在啟動時和使用穩 定時（亦即在啟動-特定時間後，背光模組的溫度趨於 穩定）具有不一致的情形。以白光LED來應用於背光模組 200為例，由於LED的色度與其内部的接面溫度（juncti〇n Temperature)有大的相關性，當白光lED逐漸使用穩定時， 隨著白光LED的接面溫度的提升，白光LED會產生藍移現 象，亦即白光LED的光色偏藍。而本實施例之背光模組2〇〇 可藉由具有驅動波形1〇〇的驅動訊號來驅動背光模組 200，藉以在背光模組200剛啟動時迅速地提升背光模組 200之光源的溫度至一穩定的工作溫度，以使背光模組2〇〇 之光源的溫度變化不玖於過大，因而可確保背光模組2〇〇 之色度的一致性。 如第1圖所示，本實施例之驅動訊號可為驅動電流或 驅動電壓，其驅動波形1 〇〇中至少包含有點燈區間110和 工作區間120。點燈區間110係用以允許背光模組200開始 點亮’而工作區間120係用以維持背光模組200進行發光， 亦即在工作區間内之驅動訊號的準位或工作週期（Duty Cycle)係用以正常維持背光模組200工作，其中在點燈區間 110内之驅動訊號的準位或工作週期係實質高於在工作區 間120内之驅動訊號的準位或工作週期。而點燈區間110 的時間長短係對應於在點燈區間110内之驅動訊號的準位 或工作週期，當點燈區間110内之驅動訊號的準位或工作 9 201003611 :::愈㈣，則點燈區間110的所需時間可愈短，亦即背 光模組綱之光源的溫度可愈快達到穩定的工作溫度，而 愈快减少背光模組2〇〇的色偏對於顯示效果的影響。 以物理意羲來作說明，本實施例之背光模組的驅動方 法係包含:提升驅動訊號來驅動背光模組2〇〇;在點燈區門 ⑽中，提升驅動訊號的準位或工作週期，以允許 _開始點亮·’接著’當驅動訊號由點燈區間ιι〇進入工作 區間12" ’降低驅動訊號的準位或工作週期，以維持背 光模組200進行發光。Cycle) # H Quality is used to drive the backlight module to operate in the driving signal level or working week in the guard zone. Moreover, according to an embodiment of the invention, the driving signal of the backlight module has a driving waveform, wherein the driving waveform includes at least a lighting interval and a working area. The lighting interval is used to allow the backlight module to start lighting. The working area is used to maintain the backlight module to emit light. The level or duty cycle of the driving signal in the lighting interval is substantially higher than the driving signal level or duty cycle in the guarding interval. According to an embodiment of the present invention, the driving method of the backlight module is to drive the backlight module to drive the backlight module to the 3 S; in the lighting interval, the driving signal is raised or the fly cycle is allowed to allow the backlight. The module starts to be exempted, and when the driving is lacking, and the 0, ° lighting interval enters the working area, the driving signal level or the working adjustment is lowered to keep the backlight module to emit light. Further, according to the invention of the present invention, the backlight module is disposed below the liquid crystal display module, and a liquid crystal display device is formed. 7 201003611 Therefore, the driving method and application of the backlight module of the present invention can rapidly raise the temperature of the light source to a stable operating temperature in a short time, so as to reduce the inconsistency of the backlight module before and after use, thereby reducing The effect of color cast on the display effect. [Embodiment] Please refer to FIG. 1 and FIG. 2, and FIG. 1 is a schematic diagram showing driving waveforms of a driving method of a backlight module according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a driving waveform according to the present invention. A front view of a backlight module and a liquid crystal display module of an embodiment. The driving method of the backlight module of the present embodiment uses a driving signal having a driving waveform 100 to drive the backlight module 200 to operate. The backlight module 200 of the embodiment can be edge lighting and straight down. The Bottom Lighting backlight module is disposed relative to the liquid crystal display module 300 to provide light 201 to the liquid crystal display module 300' and form a liquid crystal display (LCD). The light source (not shown) of the backlight module 200 is, for example, a Cold Cathode Fluorescent Lamp (CCFL), a Hot Cathode Fluorescent Lamp (HCFL), or a Light Emitting Diode (Light). -Emitting Diode; LED), Organic Light Emitting Diode (OLED), Electro-Luminescence (EL) or Flat Fluorescent Lamp (FFL). It should be noted that when the backlight module 200 is used to provide the backlight, the temperature change of the light source of the backlight module 200 affects the light of the backlight module 200. 201003611 Color under-reduction Therefore, with the use time of the backlight module 200 The increase of the temperature (4) of the backlight module itself causes the backlight module 200 to produce a color shifting situation, that is, the chromaticity of the backlight module is stable at startup and after use (ie, after startup-specific time, The temperature of the backlight module tends to be stable) with inconsistent conditions. For example, when the white LED is applied to the backlight module 200, since the chromaticity of the LED has a large correlation with the internal junction temperature (juncti〇n Temperature), when the white light lED is gradually used stably, the white LED is connected. When the surface temperature is increased, the white LED will produce a blue shift phenomenon, that is, the light color of the white LED is blue. The backlight module 2 of the embodiment can drive the backlight module 200 by driving signals having a driving waveform of 1〇〇, thereby rapidly increasing the temperature of the light source of the backlight module 200 when the backlight module 200 is just activated. The stable operating temperature is such that the temperature of the light source of the backlight module 2 is not excessively large, thereby ensuring the uniformity of the chromaticity of the backlight module 2. As shown in FIG. 1 , the driving signal of the embodiment may be a driving current or a driving voltage, and the driving waveform 1 至少 includes at least a light section 110 and a working section 120. The lighting section 110 is used to allow the backlight module 200 to start to illuminate, and the working section 120 is used to maintain the backlight module 200 to emit light, that is, the driving signal level or duty cycle in the working section (Duty Cycle) The operation of the backlight module 200 is normally maintained. The level or duty cycle of the driving signal in the lighting section 110 is substantially higher than the level or duty cycle of the driving signal in the working section 120. The length of the lighting section 110 corresponds to the level or duty cycle of the driving signal in the lighting section 110. When the driving signal level in the lighting section 110 is level or work 9 201003611::: (four), then The shorter the required time of the lighting section 110 can be, that is, the temperature of the light source of the backlight module can reach a stable working temperature, and the effect of the color shift of the backlight module 2 对于 on the display effect is reduced. The driving method of the backlight module of the embodiment includes: raising the driving signal to drive the backlight module 2; in the lighting area door (10), raising the level or working period of the driving signal. In order to allow _ to start lighting, 'then' when the driving signal is moved from the lighting interval to the working area 12" 'lower the driving signal level or duty cycle to maintain the backlight module 200 to emit light.
如第1圖所示，以白光LED來作為背光模組2〇〇的光 源為例’白光LED可藉由驅動電流來作為驅動訊號，並例 如係以脈寬調變(PWM)的方式來進行驅動，此時，在點燈 區間110内的驅動電流的工作週期係實質高於在工作區門 ⑽内之驅動電流的工作週期，藉以在背光模組200剛ϋ 的短時間内迅速地提升背純組2⑽之光源的溫度至穩定 的工作度，以減少色偏對於顯示效果的影響。As shown in FIG. 1 , a white light LED is used as a light source of the backlight module 2 ' as an example. A white light LED can be used as a driving signal by driving current, and is, for example, pulse width modulation (PWM). Driving, at this time, the duty cycle of the driving current in the lighting section 110 is substantially higher than the duty cycle of the driving current in the working area door (10), thereby rapidly raising the back in the short time of the backlight module 200. The temperature of the light source of the pure group 2 (10) is stable to the working degree to reduce the influence of the color shift on the display effect.
因此’本實施例之背光模組的驅動方法係在點燈區間 ㈣時提高驅動減的準位或工作週期，藉以在短時間内迅 速地提升背光模組200之光源的溫度至穩定的工作溫度， 以減少色偏對於顯示效果的影響。 X 請參照第3圖，其繪示依照本發明之第二實施例之背 光模組之驅動方法的驅動波形示意圖。相較於第一實施 例，第二實施例之背光模組（例如為LED背光模組）的驅動 方法係藉由驅動電流來作為驅動訊號，並例如係以直流電 201003611 流（DC)模式來進行驅動， 雪、的淮a过也 ’，在點燈區間110a内的驅動 電抓的準位係實質高於在工 期 位，藉以減少色偏對㈣g-a内之驅動電流的準 11〇 、、.'不效果的影響。舉例來說，當點 ^間：驅動電流的準位例如係實質高於偏’ 20mA^ '間12如内之驅動電流的準位例如實質低於 時’此點燈區間⑽的時間可實質少於120秒。Therefore, the driving method of the backlight module of the present embodiment increases the driving reduction level or the duty cycle in the lighting interval (four), thereby rapidly increasing the temperature of the light source of the backlight module 200 to a stable operating temperature in a short time. To reduce the effect of color cast on the display. X Please refer to FIG. 3, which is a schematic diagram showing driving waveforms of a driving method of a backlight module according to a second embodiment of the present invention. Compared with the first embodiment, the driving method of the backlight module (for example, an LED backlight module) of the second embodiment is driven by a driving current as a driving signal, and is, for example, a direct current 201003611 flow (DC) mode. Drive, snow, Huai a too, 'the driving electric grip in the lighting section 110a is substantially higher than the working period, so as to reduce the color shift to (4) the driving current in g-a, . 'The effect of no effect. For example, when the level of the driving current is, for example, substantially higher than the level of the driving current of 12 within the range of '20 mA^', for example, the timing of the lighting interval (10) may be substantially less. In 120 seconds.
凊參照第4A圖和第4B圖，其繪示依照本發明之第三 實施例之背光模組之驅動方法的驅動波形示意圖。相較於 第一實_，第三實_之#光模线以冷陰 卿邮料絲，㈣，第三實_可藉由驅動電麼; 作為驅動訊號，在點燈區間11Qb内的驅動電壓的工作週期 或準位係實質㊉於在工作區間1 2Qb内之驅動電流的工作週 期或準位，藉以在背光模組200剛啟動的短時間内迅速地 提升背光模組200之光源的溫度至穩定的工作溫度，以減 少色偏對於顯示效果的影響。 請參照第5圖，其繪示依照本發明之第四實施例之背 光模組之驅動方法的驅動波形示意圖。相較於第一實施 例’第四實施例之背光模組的驅動方法係藉由驅動電流來 作為驅動訊號，並例如係以脈寬調變（PWM)的方式來進行 驅動，此時，在點燈區間ll〇c内之驅動電流的準位係實質 高於在工作區間120c内之驅動電流的準位，藉以減少色偏 對於顯示效果的影響。 請參照第6圖，其繪示依照本發明之第五實施例之背 光模組之驅動方法的驅動波形示意圖。相較於第一實施 11 201003611 例’第五實施例之背光模組的驅動方法可藉由驅動電流或 驅動電壓來作為驅動訊號，此時，在點燈區間11〇d内的驅 動訊號可以係脈寬調變（PWM)的方式，而在工作區間12〇d 内的驅動訊號可以係直流電（DC)模式，且在點燈區間u〇d 内之驅動訊號的準位係實質高於在工作區間12〇(1内之驅動 訊號的準位’藉以減少色偏對於顯示效果的影響。 請參照第7A圖、第7B圖及第7C圖，其繪示依照本 p 發明之第六實施例之背光模組之驅動方法的驅動波形示音 圖。相較於第-實施例，第六實施例之背光模組的^動; 法可藉由驅動電流或驅動電壓來作為驅動訊號，且在點燈 區間110e内之驅動訊號的工作週期或準位係實質高於在工 作區間120e内之驅動訊號的工作週期或準位。此時，在點 燈區間110e和工作_ 120e之間的驅動訊號係以漸進的 方式來形成變化，例如為階梯式地（如第7A圖所示）或線性 漸進式地（如第7B圖所示）來降低驅動訊號的準位，亦即當 〇 驅動訊號由點燈區間110e進入工作區間120e時，驅動訊 號係以漸進的方式來降低準位或工作週期（如第7c圖所 示），藉以減少色偏對於顯示效果的影響。 由上述本發明的實施例可知，本發明之背光模組的驅 動方法可利用具有驅動波形的驅動訊號來驅動背光模組， 藉以使背光模組在短時間内迅速地提升光源的溫度至穩定 的工作溫度，以減少背光模組在使用中前後色度不一致的 情形’因而減少色偏對於顯示效果的影響。 雖然本發明已以一較佳實施例揭露如上，然其並非用 12 201003611 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾’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。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂’所附圖式之詳細說明如下： 第1圖係繪示依照本發明之第一實施例之背光模組之 驅動方法的驅動波形示意圖。 第2圖係繪示依照本發明之第一實施例之背光模組和 液晶顯示模組的正面示意圖。 第3圖係繪示依照本發明之第二實施例之背光模組之 驅動方法的驅動波形示意圖。 第4A圖和第4B圖係繒'示依照本發明之第三實施例之 背光模組之驅動方法的驅動波形示意圖。 第5圖係繪示依照本發明之第四實施例之背光模組之 驅動方法的驅動波形示意圖。 第ό圖係繪示依照本發明之第五實施例之背光模組之 驅動方法的驅動波形示意圖。 第7Α圖至第7C圖係繪示依照本發明之第六實施例之 背光模組之驅動方法的驅動波形示意圖。 【主要元件符號說明】 100 :驅動波形 13 201003611Referring to Figs. 4A and 4B, there are shown schematic diagrams of driving waveforms of a driving method of a backlight module in accordance with a third embodiment of the present invention. Compared with the first real _, the third real _ #光模线 is the cold Yinqing mail wire, (4), the third real _ can be driven by electricity; as the driving signal, the driving in the lighting interval 11Qb The duty cycle or the level of the voltage is substantially ten times the duty cycle or the level of the driving current in the working interval 1 2Qb, thereby rapidly increasing the temperature of the light source of the backlight module 200 in a short time after the backlight module 200 is just started. To a stable operating temperature to reduce the effect of color cast on the display. Referring to FIG. 5, a schematic diagram of driving waveforms of a driving method of a backlight module according to a fourth embodiment of the present invention is shown. Compared with the driving method of the backlight module of the fourth embodiment, the driving current is used as a driving signal, and is driven by, for example, pulse width modulation (PWM). The level of the driving current in the lighting interval 11〇c is substantially higher than the level of the driving current in the operating section 120c, thereby reducing the influence of the color shift on the display effect. Referring to FIG. 6, a schematic diagram of driving waveforms of a driving method of a backlight module according to a fifth embodiment of the present invention is shown. Compared with the driving method of the backlight module of the fifth embodiment of the first embodiment 11 201003611, the driving current or the driving voltage can be used as the driving signal. At this time, the driving signal in the lighting interval 11〇d can be Pulse width modulation (PWM) mode, and the driving signal in the working interval 12〇d can be in direct current (DC) mode, and the driving signal level in the lighting interval u〇d is substantially higher than in the working mode. The interval 12〇 (the level of the driving signal in 1) is used to reduce the influence of the color shift on the display effect. Please refer to FIG. 7A, FIG. 7B and FIG. 7C, which illustrate the sixth embodiment according to the present invention. The driving waveform diagram of the driving method of the backlight module. Compared with the first embodiment, the backlight module of the sixth embodiment can be used as a driving signal by driving current or driving voltage, and at a point The duty cycle or level of the driving signal in the lamp section 110e is substantially higher than the duty cycle or level of the driving signal in the working section 120e. At this time, the driving signal between the lighting section 110e and the working_120e Form changes in a gradual manner For example, stepwise (as shown in FIG. 7A) or linear progressively (as shown in FIG. 7B) to lower the level of the driving signal, that is, when the driving signal is entered from the lighting section 110e into the working section 120e. The driving signal is used to reduce the level or the duty cycle (as shown in FIG. 7c) in a progressive manner, thereby reducing the influence of the color shift on the display effect. As can be seen from the embodiments of the present invention described above, the backlight module of the present invention The driving method can drive the backlight module by using a driving signal with a driving waveform, so that the backlight module can quickly raise the temperature of the light source to a stable working temperature in a short time, so as to reduce the inconsistency of the backlight module before and after the use of the backlight module. The situation 'and thus the effect of the color shift on the display effect. Although the present invention has been disclosed above in a preferred embodiment, it is not intended to limit the invention, and any person skilled in the art, without departing from the spirit of the invention. In the scope of the invention, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; FIG. 2 is a front view showing a backlight module and a liquid crystal display module according to a first embodiment of the present invention. FIG. 3 is a second embodiment of the present invention. FIG. 4A and FIG. 4B are diagrams showing driving waveforms of a driving method of a backlight module according to a third embodiment of the present invention. FIG. 5 is a diagram showing a driving waveform of a driving method of a backlight module. A schematic diagram of driving waveforms of a driving method of a backlight module according to a fourth embodiment of the present invention. The drawing is a schematic diagram showing driving waveforms of a driving method of a backlight module according to a fifth embodiment of the present invention. 7 to 7C are schematic diagrams showing driving waveforms of a driving method of a backlight module according to a sixth embodiment of the present invention. [Main component symbol description] 100 : Drive waveform 13 201003611
110、110a、11 Ob、110c、110d、110e :點燈區間 120、120a、120b、120c、120d、120e :工作區間 200 :背光模組 201 :光線 3 0 0 .液晶顯不核組 14110, 110a, 11 Ob, 110c, 110d, 110e: lighting section 120, 120a, 120b, 120c, 120d, 120e: working section 200: backlight module 201: light 3 0 0. liquid crystal display core group 14