1259035 mi?學式時，請揭示最能顯示發明特 .九、發明說明： 【發明所屬之技術領域】 ㈢本發明是有關於一種光學模組（Light Module)，且特 別是有關一種具有輝度控制之光學模組及其輝度調整的 方法’該光學模組可以是一背光源模組，並可應用於平 面顯示器中。 【先前技術】 近來’顯示器科技進展快速，而平面顯示器，如液 晶顯示器，不同於傳統之陰極射線管顯示器，更是被成 功的發展問世。液晶顯示器通常需要一個光學模組，例 如背光源模組，以作爲顯示器之光源，如此，每一影像 Φ 畫素便能產生所需的彩色光而形成一全彩的畫面。 一傳統之液晶顯示器，如第1圖所示，包括一框架 1 02以及被框架所固持的液晶顯示面板之組立1 04以顯示 影像。其中，又包括其他代表性之元件，如塑膠框架1 0 6， 一光學膜片及擴散板108，燈管固定裝置110a與110b， 一燈管模組112，一反射片114，以及一背後外殻116相 繼組合而成一液晶顯示器1〇〇,至於位置118是訊號輸入 處。 在第1圖中，燈管模組1 1 2是由複數組燈管所組成， 例如冷陰極螢光管（CCFLs)。所有的燈管皆整合在一起以 6/20 1259035 形成=ϊ管i組了若^^；^=燈管受損而需要被更換， 就必須置換整顏燈管摸組，這將會造成維護上之高成 本，爲了解決此問題，有另一燈管模組設計可讓任一單 組燈管個別地被控制而因此可被單獨地置換。 _ 第2圖所繪示爲習知另一具複數組置換燈管之背光 源模組液晶顯示器的示意圖。圖中顯示框架1 02以及液 • 晶顯示面板104 ;然而，背光源模組是由複數組燈管200 所構成，且每一燈管可被電源個別的控制與個別的置換。 # 然而，第2圖之設計仍有其缺點，因爲每一燈管皆可 個別置換的情形下，就不需更換整組背光源模組，因此， 隨著燈管使用時間增加其輝度也因此降低的情況，新置 換之燈管其輝度勢必會比其餘組燈管要大許多。 上述現象將於第3圖中描述，在顯示區域300中， 有一新燈管302取代了原來舊燈管之位置304,其燈管輝 度之分佈如圖右側，如一般人所見，其燈管輝度於位置 3 04之區域最強，在實際顯示的影像中，將會出現特別明 亮突出之長條影像，代表新置換之燈管輝度與其餘舊燈 •管輝度有明顯之落差，造成輝度不均之影像顯示品質。 【發明内容】 因此，本發明的主要目的在提供一光學模組，可作 爲一平面顯示器之背光源模組。該光學模組可以任意更 換一組新的發光源，例如是一燈管，且該新置換的發光 源可以自動或手動調整使其輝度均勻。 根據本發明之上述目地，本發明提供一光學模組，可作 爲一顯示器之背光源。此光學模組，例如是一背光源模組， 包括複數個發光源單兀，例如是燈管單元；一控制單元， 7/20 1259035 包含一發光源輝度相對其使用時間的一第一關係對照表 以及該發光源輝度對應一控制電流的一第二關係對照 表；以及一計時裝置，當上述光學模組一打開便開始累 計一時間値；一電源供應單元，連結控制單元並個別供 應一控制電流給複數個發光源單元之其一；其中，對於一 • 個別置換的發光源單元，依據使用時間、第一關係對照表 以及第二關係對照表，上述電源供應單元會調整一個別 ' 的控制電流以產生一大致與其他發光源單元相等的輝度。 另一方面，前述的電源供應單元包括了一自動輝度 W 調整裝置，連結該控制單元。又有一電源轉換器，連結 於上述複數個發光源與自動輝度調整裝置之間用以個別 供應一控制電流給每一個發光源。 並且，上述電源供應單元更包括一手動調整輝度裝 置以使一使用者可以手動調整發光源輝度。 本發明的另一目的在提供一輝度調整裝置，依據燈管 預期總共使用的時間以自動調整燈管輝度，而該輝度調 整裝置包括一儲存記憶單元，儲存一燈管輝度與一使用 # 時間的第一關係對照表以及該燈管輝度與一控制電流的 第二關係對照表；一輸入單元，以輸入一燈管預期的總 共使用時間；一電源供應單元，連結上述儲存記憶單元 與輸入單元以決定該支燈管所需的控制電流，以產生一 所要的燈管輝度。 本發明的又一目的是提供一種調整背光源模組輝度的 方法，其中此背光源模組包括複數個燈管組，而每一燈管 組接受個別的控制電流’此調整背光源模組輝度的方法 包括取得一燈管輝度相對其使用時間的一第一關係對照 表以及該燈管輝度對應一操作中之控制電流的一第二關 8/20 1259035 係對照表。接著，累計該背光源模組的一總共使用時間， 其中該些燈管Ψ元具有一現存的輝度，依據第一關係對 照表中之上述總共使用時間決定一所需的燈管輝度，再 依據第二關係對照表中之所需的燈管輝度決定一所需的 控制電流，再者，施予該所需的控制電流至上述燈管組 . 中之一組特定的燈管。最後，使該組特定的燈管是一組 新置換的燈管，以至於使該組特定的燈管具有與上述現 * 存的輝度大致相等的燈管輝度。 爲讓本發明之上述和其他目的、特徵、和優點能更 W 明顯易懂，下文特舉一較佳實施例，並配合所附圖示， 作詳細說明如下。 【實施方式】 如第3圖所示，在顯示器領域，傳統的光學模組中若要 置換一組新的發光源，較佳如燈管，通常會有輝度不均的 問題。而本發明爲要解決此問題係提出一種新的光學模組 之設計，並以一較佳實施例揭露如下，然其並非用以限定 本發明。 基本上，本發明之光學模組包括複數個發光源，較佳 如燈管以及一控制結構。首先，複數組燈管例如第2圖所 示，然而，每一組燈管可以是單支燈管或具有不同形狀設 計的複數支燈管。至於控制結構，依據本發明一較佳實施 例，此控制結構係以如第4圖所示之不同的功能性方塊以 控制燈管。此控制結構包括一電源供應單元406，連結一 控制單元407並個別供應一控制電流給上述複數燈管組 之其一。 此控制單元407，係模擬一實驗數値關於一燈管輝度 9/20 1259035 相對其使用時間的一第一關係對照表408以及該燈管輝 度對應一控㈣電流的一第二關係對照表410,而上述關係 數値對照表408與410將於第5圖及第6圖中再述。爲了 得知該光學模組之總共使用時間，當光學模組電源一打 開，一具有計時訊號之計時裝置412便開始計時，接著 • 依據第一關係數値對照表408使該光學模組在目前的時 間相對於該總共使用時間具有一預期的燈管輝度；再 著，再依據第二關係數値對照表410中上述所預期的燈 管輝度以決定該所需的控制電流。因此，控制單元407 φ 的作用係將上述第一及第二關係數値對照表408與4 1 0， 以及前述總共使用時間分別提供給電源供應單元406，然 後，電源供應單元406便可供應一控制電流給特定的燈 管，例如是一新置換的燈管。而前述控制單元407中主 要包含的三個部分分別是第一及第二關係數値對照表 408，410與計時裝置412，個別的可置於光學模組中適 當的位置，例如，控制單元407可倂入電源供應單元406 中；且第一及第二關係數値對照表408，410可儲存於一 記憶儲存器中，例如是一記憶體（memory);且計時裝置 4 1 2可以爲一置放光學模組中任意適當位置的計時器亦 ^ 可依據實際上的設計作適當調整。 以上爲有關第4圖中控制結構的描述，而對於第5圖 及第6圖中關係數値對照表408與410的詳細描述如下。 第5圖係爲一光學模組，例如是一背光源模組，在不同供 應電流的情況下，其燈管輝度與使用時間的關係圖，而 第6圖係以6 mA的操作電流爲例，其燈管輝度的變化率 隨著施予該燈管之電流而變化的關係圖。第5圖中之曲線 是依據對照表形式的複數個數値點所描繪而出，而其他 圖中未顯示的點亦可由內插法或數學上的方法獲得。在 一較佳實施例中，一開始的燈管輝度設定爲1 〇〇%，而當 10/20 1259035 供應ίϋ爲5 m A且該燈管組正常運作超過1 〇 〇 〇 〇小時， 其燈管輝度將可預期爲80%，至於另一條6 mA供應電流 的曲線，如上述在10000小時後之燈管輝度約77% ;換 句話說，當光學模組正常操作1 0000小時並施予一 5 mA 的控制電流時，其個別燈管的輝度將可預期爲80%。然 、 而，若新置換一組燈管，其燈管輝度仍維持在100%，這 時如第3圖所示之輝度不均的現象將會出現。因此，本發 * 明以計時裝置4 1 2提供該光學模組在目前之使用時間 下，並藉由如第5圖之關係數値對照表即可決定目前的燈 φ管輝度。 接著，在第6圖中，係以6 mA的操作電流爲例，其 燈管輝度的變化率隨著施予該燈管之電流量而變化。配 合第5圖的結果，當光學模組的操作時間約爲1 0000小 時，如果所要的亮度爲原始的77%，則應該施加約4.3 mA 的電流給光學模組。換句話說，原本舊的已被操作有 1 0000小時的那些燈管被施加6 mA的電流，而新置換的 燈管則被施加約4.3 mA。其結果，光學模組的所有的燈 管大致都會有一樣的輝度。這就是本發明調整燈管輝度 Φ 的機制，一些類似第6圖但在不同操作電流下的曲線會被 個別建立成另一關係對照表。 一般而言，第5圖及第6圖中之關係數値可儲存於一 g己憶儲存器中，並放置在光學模組中任意適當位置亦或 外接式的儲存位置，並可依據實際上的設計作調整。 再回到第4圖，電源供應單元406連結控制單元407 並取得一組上述關係數値以決定所需的控制電流給特定 的一組燈管，例如是一組新置換的燈管。電源供應單元 406包括一個與控制單元407連結的自動輝度調整裝置 11/20 1259035 402 ’以及一連結於複數組燈管（第4圖未顯示）與自動輝 度調整裝置4G2之間的電源轉換器400,且該電源轉換器 400是在自動輝度調整裝置402的控制之下以供應一所需 的控制電流給複數組燈管之其一。對於特定一組置換燈 管而言，必須供應一特定的控制電流；然而，該控制電 流是指一操作電壓對應產生的電流以滿足所需的燈管輝 度。基於本發明所描述之設計原理，熟悉該項技藝人士 可依實際需求稍作改變，例如，上述自動輝度調整裝置 402與控制單元407可整合在一起。 此外，電源供應單元406更包括一手動輝度調整裝 置404以使一使用者可以手動調整其輝度。使用者是經 由一燈管選擇器414, 一輝度手調選擇器416,以及一界 面418。其中，使用者可藉由燈管選擇器414選擇一特定 之燈管，並藉由輝度手調選擇器416選擇調整輝度大小 (增加或減少），以控制該被選定之燈管的控制電流大小。 總之，本發明在實施上有自動及手動二種模式。 依據本發明自動輝度調整模式下之一較佳實施例，並 在第4圖之基本架構下提供如第7圖所示之邏輯功能方塊 圖，在第7圖中，一燈管電壓控制裝置700包括電源控制 器406以及上述二關係數値對照表408與4 1 0，而計時的訊 號702輸入至燈管電壓控制裝置700,此燈管電壓控制裝置 700接受到此訊號後決定所需的電壓並輸出此計時的訊號 702給電壓調整單元710,而電壓調整單元710包括一切換 器704以調整燈管電壓增加或減少，在第7圖中以706與 708表示，該增加或減少之電壓有其相對應之電流供應至燈 管712。此外，可選擇性的裝置一輝度感應器714以感應一 局部輝度並回饋該局部輝度給該燈管電壓控制裝置700作 爲參考以作進一步輝度的調整。値得注意的是，第7圖的 12/20 1259035 架構僅爲一以第4圖之設計原理作爲基礎之例子。 接著，請參照手動控制模式之第8圖，液晶顯示器面 板800可利用其介面上或外接式的區域選擇器802及輝度 手調選擇器804，以局部增加或減少燈管輝度。 • 最後，第9圖仍爲一手動控制模式下之輝度調整功能 性方塊圖，其中方塊900，908及910類似於第7圖中之方 塊700，710與712，且電壓調整單元908也包括一切換器 903以調整燈管電壓增加或減少，在第9圖中以906與904 φ表示，該增加或減少之電壓有其相對應之電流供應至燈管 910。然而，不同的是該訊號輸入的模式是以手動的方式， 較佳是以顯示器控制介面軟體設定一標準影像圖912,使用 者以目視的方式並以手動選擇914,而燈管之選擇乃藉由燈 管選擇器916並輸入訊號至燈管電壓控制裝置900以改變 控制電流之大小，間接達成燈管輝度均勻的目的。 本發明亦提供一種調整背光源模組輝度的方法，其 中該背光源模組包括複數組燈管，而每一組燈管接受個 別的控制電流，該方法包括取得一燈管輝度相對其使用 • 時間的一第一關係對照表以及該燈管輝度對應一控制電 流的一第二關係對照表；接著，累計該背光源模組的一 總共使用時間，而其中該些燈管單元具有一現存的輝 度；再依據第一關係對照表中之總共使用時間決定一所 需的燈管輝度，當然，可利用數學上之內插法求得我們 需要的數値；接著，依據第二關係對照表中之該所需的 燈管輝度決定一所需的控制電流；最後，施予該所需的 控制電流至一特定的燈管，且通常爲一組新置換的燈管。 雖然本發明已以較佳實施例揭露如上，然其並非用 Μ限定本發明，任何熟習此技藝者，在不脫離本發明之 13/20 1259035 I冑 ΙΨ ^ ^ ^ ^ ^ ^ ^ ^ 之保護範圍甞視後附之申請專利範圍所界定者爲準、 明 說 單 簡 式 圖 第1圖所繪示爲習知液晶顯示器模組各代表元件的示意 - 圖。 • 第2圖所繪示爲習知另一具置換燈管背光源模組之液晶 顯示器的示意圖。 #第3圖所繪示爲第2圖習知液晶顯示器出現輝度不均的 示意圖。 第4圖所繪示爲本發明較佳實施例之一種控制燈管組的 功能方塊圖。 第5圖所繪示爲本發明之燈管輝度對應其使用時間的關 係圖。 第6圖所繪示爲本發明之燈管輝度改變率對應其控制電 B 流的關係圖。 第7圖所繪示爲本發明較佳實施例之一種自動輝度調整 模式下之功能方塊圖。 第8圖所繪示爲本發明較佳實施例之一種手動輝度調整 模式下之槪略示意圖。 第9圖所繪示爲本發明較佳實施例之一種手動輝度調整 模式下之功能方塊圖。 14/20 1259035 【主要元件符號說明】 1〇〇 :液晶顯示器 102 :框架1259035 mi? When learning, please reveal the best indication of invention. 9. Invention: [Technical field of invention] (3) The present invention relates to an optical module, and particularly to a brightness control Optical module and method for adjusting the brightness thereof The optical module can be a backlight module and can be applied to a flat panel display. [Prior Art] Recently, display technology has advanced rapidly, and flat-panel displays, such as liquid crystal displays, are different from conventional cathode ray tube displays, and have been successfully developed. Liquid crystal displays typically require an optical module, such as a backlight module, to act as a light source for the display, such that each image Φ pixel produces the desired colored light to form a full color picture. A conventional liquid crystal display, as shown in Fig. 1, includes a frame 102 and a liquid crystal display panel held by the frame to form an image 104. Among them, other representative components, such as plastic frame 106, an optical film and diffusion plate 108, lamp fixing devices 110a and 110b, a lamp module 112, a reflection sheet 114, and a back surface The shells 116 are successively combined to form a liquid crystal display 1 〇〇, and the position 118 is a signal input. In Fig. 1, the lamp module 1 12 is composed of a plurality of array lamps, such as cold cathode fluorescent tubes (CCFLs). All the lamps are integrated to form 6/20 1259035 = ϊ tube i group if ^^; ^= lamp is damaged and needs to be replaced, it is necessary to replace the whole tube lamp group, which will cause maintenance In order to solve this problem, another lamp module design allows any single group of lamps to be individually controlled and thus can be replaced separately. _ Figure 2 is a schematic diagram showing another conventional backlight module liquid crystal display with a complex array of replacement lamps. The frame 102 and the liquid crystal display panel 104 are shown; however, the backlight module is composed of a plurality of array lamps 200, and each of the lamps can be individually controlled and individually replaced by a power source. # However, the design of Figure 2 still has its shortcomings. Because each lamp can be replaced individually, it is not necessary to replace the entire set of backlight modules. Therefore, as the lamp usage time increases its brightness, In the case of a decrease, the brightness of the newly replaced lamp is bound to be much larger than that of the other group of lamps. The above phenomenon will be described in FIG. 3. In the display area 300, a new lamp 302 replaces the position 304 of the old lamp, and the distribution of the brightness of the lamp is as shown on the right side. As seen by the average person, the brightness of the lamp is The area of position 3 04 is the strongest. In the actual displayed image, there will be a particularly bright and long image, which represents the difference between the brightness of the new replacement lamp and the remaining old lamp and tube brightness, resulting in uneven brightness. Display quality. SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an optical module that can be used as a backlight module for a flat panel display. The optical module can be arbitrarily replaced with a new set of illumination sources, such as a tube, and the newly replaced illumination source can be adjusted automatically or manually to achieve uniform brightness. In accordance with the above objects of the present invention, the present invention provides an optical module that can be used as a backlight for a display. The optical module is, for example, a backlight module, comprising a plurality of illumination source units, such as a lamp unit; and a control unit, 7/20 1259035, comprising a first relationship comparison of the luminance of the illumination source with respect to its use time. a second relationship table corresponding to a control current of the illumination source; and a timing device for accumulating a time period when the optical module is turned on; a power supply unit, connecting the control unit and individually supplying a control The current supply to one of the plurality of illumination source units; wherein, for an individually replaced illumination source unit, the power supply unit adjusts a different control according to the usage time, the first relationship comparison table, and the second relationship comparison table. The current is generated to produce a luminance substantially equal to that of the other illumination source cells. On the other hand, the aforementioned power supply unit includes an automatic luminance W adjusting device that is coupled to the control unit. There is a power converter coupled between the plurality of illumination sources and the automatic luminance adjustment device for individually supplying a control current to each of the illumination sources. Moreover, the power supply unit further includes a manual adjustment brightness device to enable a user to manually adjust the luminance of the illumination source. Another object of the present invention is to provide a brightness adjusting device for automatically adjusting the brightness of the lamp according to the expected total time of use of the lamp, and the brightness adjusting device comprises a storage memory unit for storing a lamp brightness and a time using a first relationship comparison table and a second relationship table between the brightness of the lamp and a control current; an input unit for inputting a total usage time expected by a lamp; and a power supply unit connecting the storage memory unit and the input unit The control current required for the lamp is determined to produce a desired lamp brightness. Another object of the present invention is to provide a method for adjusting the brightness of a backlight module, wherein the backlight module includes a plurality of lamp groups, and each tube group receives an individual control current 'this adjusts the brightness of the backlight module. The method includes obtaining a first relationship comparison table of lamp brightness with respect to its use time and a second level 8/20 1259035 comparison table of the lamp tube brightness corresponding to the control current in an operation. And accumulating a total usage time of the backlight module, wherein the lamp units have an existing luminance, and determining a required lamp brightness according to the total usage time in the first relationship comparison table, and then The required lamp brightness in the second relationship table determines a required control current, and further, the required control current is applied to one of the lamp groups. Finally, the particular set of lamps is a set of newly replaced lamps such that the particular set of lamps has a lamp brightness that is substantially equal to the brightness of the present invention. The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims. [Embodiment] As shown in Fig. 3, in the field of displays, in a conventional optical module, if a new set of light sources is to be replaced, preferably as a lamp, there is usually a problem of uneven brightness. While the present invention is directed to solving the problem, a new optical module design is proposed and disclosed in a preferred embodiment, which is not intended to limit the present invention. Basically, the optical module of the present invention includes a plurality of illumination sources, such as a tube and a control structure. First, the complex array of lamps is shown in Fig. 2, however, each group of lamps may be a single tube or a plurality of tubes having different shapes. As for the control structure, in accordance with a preferred embodiment of the present invention, the control structure is controlled by a different functional block as shown in Figure 4 to control the lamp. The control structure includes a power supply unit 406 coupled to a control unit 407 and individually supplying a control current to one of the plurality of lamp groups. The control unit 407 simulates an experimental number 一 a first relationship comparison table 408 about a lamp brightness 9/20 1259035 with respect to its use time, and a second relationship table 410 corresponding to the control tube (four) current of the lamp brightness. The above relationship numbers 408 and 410 will be described again in FIGS. 5 and 6. In order to know the total usage time of the optical module, when the optical module power is turned on, a timing device 412 having a timing signal starts to count, and then • according to the first relationship 値 comparison table 408, the optical module is currently The time has an expected lamp brightness with respect to the total usage time; and then, according to the second relationship number, the above-mentioned expected lamp brightness in the table 410 is used to determine the required control current. Therefore, the control unit 407 φ acts to supply the first and second relationship numbers 値 and 407, and the total usage time to the power supply unit 406, respectively, and then the power supply unit 406 can supply one. The current is controlled to a specific lamp, such as a newly replaced lamp. The three main components included in the control unit 407 are the first and second relationship numbers 408, 410 and the timing device 412, and the individual can be placed in an appropriate position in the optical module, for example, the control unit 407. The first and second relationship numbers 408, 410 can be stored in a memory, such as a memory; and the timing device 4 1 2 can be a The timer for any suitable position in the optical module can also be adjusted according to the actual design. The above is a description of the control structure in Fig. 4, and the detailed description of the relationship number tables 408 and 410 in Figs. 5 and 6 is as follows. Figure 5 is an optical module, for example, a backlight module, the relationship between the brightness of the lamp and the time of use in the case of different current supply, and the sixth figure is an example of the operating current of 6 mA. The relationship between the rate of change of the brightness of the tube and the current applied to the tube. The curve in Fig. 5 is drawn based on a plurality of numbers in the form of a look-up table, and points not shown in other figures can also be obtained by interpolation or mathematical methods. In a preferred embodiment, the initial lamp brightness is set to 1 〇〇%, and when the 10/20 1259035 supply is 5 m A and the lamp group is operating normally for more than 1 〇〇〇〇 hours, the lamp The tube brightness will be expected to be 80%. As for the other 6 mA supply current curve, the lamp brightness after 10000 hours is about 77%; in other words, when the optical module is operating normally for 10,000 hours and is given a The brightness of individual lamps will be expected to be 80% when the current is controlled at 5 mA. However, if a new lamp is replaced, the brightness of the lamp is maintained at 100%, and the phenomenon of uneven brightness as shown in Fig. 3 will appear. Therefore, the present invention provides the current module φ tube luminance by using the timing device 4 1 2 to provide the optical module at the current usage time and by using the relationship number table as shown in FIG. Next, in Fig. 6, an operation current of 6 mA is taken as an example, and the rate of change in the brightness of the lamp varies with the amount of current applied to the lamp. In conjunction with the results of Figure 5, when the operating time of the optical module is approximately 100,000 hours, if the desired brightness is 77% of the original, approximately 4.3 mA of current should be applied to the optical module. In other words, the old tubes that had been operated for 100,000 hours were subjected to a current of 6 mA, while the newly replaced tubes were applied with about 4.3 mA. As a result, all of the lamps of the optical module will have approximately the same brightness. This is the mechanism by which the present invention adjusts the brightness Φ of the lamp. Some curves similar to Figure 6 but at different operating currents are individually set up as another relationship table. In general, the relationship numbers in Figures 5 and 6 can be stored in a memory and placed in any suitable location in the optical module or in an external storage location, and can be The design is adjusted. Returning to Fig. 4, power supply unit 406 is coupled to control unit 407 and takes a set of said relationship numbers to determine the desired control current for a particular group of lamps, such as a new set of replaced lamps. The power supply unit 406 includes an automatic brightness adjustment device 11/20 1259035 402 ' coupled to the control unit 407 and a power converter 400 coupled between the complex array lamp (not shown in FIG. 4) and the automatic brightness adjustment device 4G2. And the power converter 400 is under the control of the automatic brightness adjustment device 402 to supply a required control current to one of the plurality of array lamps. For a particular set of replacement lamps, a particular control current must be supplied; however, the control current is the current produced by an operating voltage to meet the desired lamp lumen. Based on the design principles described in the present invention, those skilled in the art can make minor changes according to actual needs. For example, the automatic brightness adjustment device 402 and the control unit 407 can be integrated. In addition, the power supply unit 406 further includes a manual brightness adjustment device 404 to allow a user to manually adjust the brightness thereof. The user is via a lamp selector 414, a luminance hand selector 416, and an interface 418. The user can select a specific lamp by the lamp selector 414, and select the brightness (increase or decrease) by the brightness hand selector 416 to control the control current of the selected tube. . In summary, the present invention has two modes of implementation, automatic and manual. According to a preferred embodiment of the automatic luminance adjustment mode of the present invention, and in the basic architecture of FIG. 4, a logic function block diagram as shown in FIG. 7 is provided. In FIG. 7, a lamp voltage control device 700 is provided. The power controller 406 and the two relationship data tables 408 and 401 are included, and the timed signal 702 is input to the lamp voltage control device 700. The lamp voltage control device 700 receives the signal and determines the required voltage. The timing signal 702 is output to the voltage adjustment unit 710, and the voltage adjustment unit 710 includes a switch 704 to adjust the lamp voltage increase or decrease, which is represented by 706 and 708 in FIG. 7, and the voltage is increased or decreased. Its corresponding current is supplied to the lamp tube 712. In addition, a luminance sensor 714 can be selectively applied to sense a local luminance and feedback the local luminance to the lamp voltage control device 700 for further brightness adjustment. It is worth noting that the 12/20 1259035 architecture in Figure 7 is only an example based on the design principles of Figure 4. Next, referring to Fig. 8 of the manual control mode, the liquid crystal display panel 800 can use its interface or external type area selector 802 and the luminance manual selector 804 to locally increase or decrease the brightness of the tube. • Finally, Figure 9 is still a luminance adjustment functional block diagram in a manual control mode, wherein blocks 900, 908 and 910 are similar to blocks 700, 710 and 712 in Figure 7, and voltage adjustment unit 908 also includes a The switch 903 is used to adjust the lamp voltage increase or decrease, which is represented by 906 and 904 φ in Fig. 9, and the increased or decreased voltage has its corresponding current supplied to the lamp 910. However, the difference is that the mode of the signal input is manually. Preferably, the standard image map 912 is set by the display control interface software, and the user selects 914 by visual means and manually, and the selection of the lamp is borrowed. The lamp selector 916 inputs a signal to the lamp voltage control device 900 to change the magnitude of the control current, thereby indirectly achieving the purpose of uniform brightness of the lamp. The invention also provides a method for adjusting the brightness of a backlight module, wherein the backlight module comprises a plurality of array lamps, and each group of lamps receives an individual control current, the method comprising: obtaining a lamp brightness relative to the use thereof; a first relationship comparison table of time and a second relationship table of the control tube current corresponding to a control current; then, accumulating a total usage time of the backlight module, wherein the lamp units have an existing Brightness; then determine the required lamp brightness according to the total usage time in the first relationship table. Of course, mathematical interpolation can be used to obtain the number we need; then, according to the second relationship table The desired lamp brightness determines a desired control current; finally, the desired control current is applied to a particular lamp, and typically a new set of replaced lamps. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one skilled in the art can protect without departing from the invention by 13/20 1259035 I 胄ΙΨ ^ ^ ^ ^ ^ ^ ^ ^ The scope of the patent application is defined by the scope of the patent application, and the schematic diagram of the representative components of the conventional liquid crystal display module is shown in FIG. • Figure 2 is a schematic view of another conventional liquid crystal display with a replacement lamp backlight module. #图图图 is a schematic diagram showing the uneven brightness of the liquid crystal display in the second figure. FIG. 4 is a functional block diagram of a control lamp group according to a preferred embodiment of the present invention. Figure 5 is a diagram showing the relationship between the brightness of the lamp of the present invention and its use time. Figure 6 is a diagram showing the relationship between the brightness change rate of the lamp of the present invention and its control current B flow. FIG. 7 is a functional block diagram of an automatic luminance adjustment mode according to a preferred embodiment of the present invention. FIG. 8 is a schematic diagram of a manual brightness adjustment mode according to a preferred embodiment of the present invention. FIG. 9 is a functional block diagram of a manual luminance adjustment mode according to a preferred embodiment of the present invention. 14/20 1259035 [Explanation of main component symbols] 1〇〇: LCD monitor 102: frame
1 04 :液晶顯示面板之組立 106 :塑膠框架 108 :光學膜片及擴散板 110a、110b:燈管固定裝置 I 1 2 :燈管模組 II 4 :反射片 11 6 :背後外殼 11 8 :訊號輸入處 200 :複數組燈管 300 :顯示區域 3 02 :新燈管 304:新燈管置換舊燈管之位置 400 :電源轉換器 402 :自動輝度調整裝置 404 :手動輝度調整裝置 15/20 1259035 406 :電源供應單元 407 :控制單元 408 :燈管輝度相對其使用時間的第一關係數値 4 1 0 :燈管輝度對應一控制電流的第二關係數値 4 1 2 :計時裝置1 04 : Assembly of liquid crystal display panel 106 : Plastic frame 108 : Optical film and diffusion plate 110a, 110b: Lamp fixing device I 1 2 : Lamp module II 4 : Reflecting sheet 11 6 : Back shell 11 8 : Signal Input 200: Complex array lamp 300: Display area 3 02: New lamp 304: New lamp replacement position of old lamp 400: Power converter 402: Automatic brightness adjustment device 404: Manual brightness adjustment device 15/20 1259035 406: power supply unit 407: control unit 408: first relationship of lamp brightness with respect to its use time 値 4 1 0 : lamp brightness corresponds to a second relationship of control current 値 4 1 2 : timing device
4 1 4、9 1 6 :燈管選擇器 416、804 :輝度手調選擇器 418 :界面 700、900 :燈管電壓控制裝置 702 :計時的訊號 704、903 :切換器 706、906 :燈管電壓增加 708、904 :燈管電壓減少 710、908 :電壓調整單元 7 1 2 ' 9 1 0 :燈管 7 1 4 :輝度感應器 800 :液晶顯示器面板 802 :區域選擇器 16/20 1259035 9 1 2 :標準影像圖 914 :目視與手動選擇 十、申請專利範圍·· - 1 ·一種可控制輝度之光學模組，用以作爲顯示器之光 源，該光學模組包括： 複數個發光源： φ 一控制單元，包含一發光源輝度相對一使用時尚的 一第一關係對照表以及該發光源輝度對應一控制電流的 一第二關係對照表，以及一計時裝置以計算該光學模組 之一總共使用時間；以及 一電源供應單元，連結該控制單元並個別供應一控 制電流給該些複數個發光源之其一； 其中，依據該使用時間、該第一關係對照表以及該 第二關係對照表，對於一個別置換的發光源，該電源供 φ 應單元調整一個別的控制電流以產生一大致與其他組發 光源相等的輝度。 2·如申請專利範圍第1項所述之光學模組，其中該些 發光源包括燈管。 3 .如申請專利範圍第1項所述之光學模組，其中該 電源供應單元包括： 一自動輝度調整裝置，連結該控制單元；以及 一電源轉換器，連結於該些發光源與該自動輝度調整 17/204 1 4, 9 1 6 : Light tube selector 416, 804: Brightness key selector 418: Interface 700, 900: Lamp voltage control device 702: Timed signals 704, 903: Switch 706, 906: Light tube Voltage increase 708, 904: lamp voltage reduction 710, 908: voltage adjustment unit 7 1 2 ' 9 1 0 : lamp 7 1 4: luminance sensor 800: liquid crystal display panel 802: area selector 16/20 1259035 9 1 2: Standard image map 914: Visual and manual selection X. Patent application range · · - 1 · An optical module with controllable brightness, used as a light source for the display, the optical module includes: a plurality of illumination sources: φ The control unit includes a first source comparison table of the luminance of the illumination source relative to a fashion, a second relationship table corresponding to the control current of the illumination source, and a timing device for calculating a total use of the optical module. And a power supply unit that connects the control unit and individually supplies a control current to one of the plurality of illumination sources; wherein, according to the usage time, the first relationship comparison table, and the second Table, not a replacement for the light emitting source, the power supply unit φ should be adjusted to produce a level of control current with a substantially made equal to the other groups of light sources luminance. 2. The optical module of claim 1, wherein the light sources comprise a light tube. 3. The optical module of claim 1, wherein the power supply unit comprises: an automatic brightness adjustment device coupled to the control unit; and a power converter coupled to the illumination sources and the automatic luminance Adjustment 17/20