1362659 [0001] [0002] [0003] [0004] [0005] 095144694 100年10月26日核正替换頁 發明說明： 【發明所屬之技術領域】 本發明涉及一種光碟驅動器，尤其涉及一種光碟驅動器 的光學讀取頭的傾角調整方法和裝置。 【先前技術】 基於光碟存儲量大、保存方便等特性，光碟機及光碟被 廣泛的應用於人們的工作生活當中。 光碟機係藉由其内部的光學讀取頭來讀取光碟上的資訊 或將資訊燒錄到光碟上。通常，光碟機包括有帶動光碟 旋轉之主軸馬達，及帶動光學讀取頭沿著光碟的徑向方 向移動之步進馬達，以對光碟進行讀/寫操作。 光碟機的光學讀取頭的主要組件包括：雷射二極體、物 鏡、光檢測器、致動器等。以讀取光碟上的資訊為例， 雷射二極體發出之光束藉由物鏡聚焦到光碟之資訊層上 ，光檢測器則接收從光碟上反射回來之光束，並對反射 光束進行分析處理，得到光碟上之資訊。 由於光碟上之資訊轨道十分緊密，光束聚焦到資訊執道 上之精度要求很高，通常要求光學讀取頭在讀取過程中 與光碟之距離應當保持不變，並且光束應當保持與光碟 表面垂直。光學讀取頭係被安裝在二平行滑轨上，藉由 馬達的牽引而沿滑轨方向移動。然而，在光碟機之生產 過程中，由於滑軌等機構件的尺寸誤差以及光學讀取頭 中光學元件之偏差，使光學讀取頭的移動方向與光碟表 面形成一定的傾斜角度，從而導致光學讀取頭髮出的光 束不能垂直射到光碟表面，影響讀碟品質。為此，光碟 表單编號A0101 第4頁/共23頁 1003397670-0 1362059 100年.10月26日修正替换頁 [0006] [0007] [0008] [0009] [0010] [0011] 095144694 機在出廠前需要進行光學讀取頭的傾角調試。傳統的傾 角調試係藉由對平整玻璃片進行讀取，並根據讀取時產 生誤差資訊機械的調整所述滑軌某一端之高低，使光學 讀取頭能夠相對光碟平行移動，以保證讀取品質。 然而，普通用戶的光碟來源複雜，由於光碟本身之品質 問題或老化都可能使得光碟表面之平整度降低，出現翹 曲現象，並且不同光碟發生之翹曲程度也不盡相同。如 此，原先調整好之光學讀取頭的傾角就不再適合此類光 碟，從而導致讀碟品質下降，甚至無法讀取。 【發明内容】 有鑒於此，有必要提供一種能適用多種光碟之光學讀取 頭之傾角調整方法。 還有必要提供一種能適用多種光碟之光學讀取頭之傾角 調整裝置。 一種光學讀取頭傾角調整方法，包括如下步驟： 記錄光學讀取頭從光碟内圈到外圈所產生之當前聚焦誤 差訊號； 根據該當前聚焦誤差訊號和預設的初始傾角調整參數， 生成實際傾角調整參數，其中該初始傾角調整參數係在 光碟機出廠前，藉由讀取平整玻璃片，記錄光學讀取頭 從該平整玻璃片最内圈到最外圈所產生之初始聚焦誤差 訊號，再根據該初始聚焦誤差訊號生成並存儲於該光碟 機之存儲單元中； 存儲該實際傾角調整參數； 表單編號A0101 第5頁/共23頁 1003397670-0 [0012] 1362659 _ 100年10月26日修正替換頁 [0013] 在讀取該光碟上的資訊或寫入資訊到該光碟上時，根據 該實際傾角調整參數調整該光學讀取頭的傾斜角度。 [0014] 一種光學讀取頭傾角調整裝置包括記憶體、接收單元、 處理單元、暫存器和發送單元。該記憶體用於存儲預設 之初始傾角調整參數，其中該初始傾角調整參數係在光 碟機出廠前，藉由讀取平整玻璃片，記錄光學讀取頭從 該平整玻璃片最内圈到最外圈所產生之初始聚焦誤差訊 號，再根據該初始聚焦誤差訊號生成並存儲於該光碟機 之存儲單元中。該接收單元用於接收光學讀取頭讀取光 碟所生成之當前聚焦誤差訊號。該處理單元用於根據該 初始傾角調整參數和該當前聚焦誤差訊號，生成實際傾 角調整參數。暫存器用於暫存該處理單元產生之該實際 傾角調整參數。該發送單元用於在該光學讀取頭讀取該 光碟上的資訊時，發送該暫存器中之該實際傾角調整參 數給該光學讀取頭，以調整該光學讀取頭髮出的雷射光 束之角度。 [0015] 藉由上述學讀取頭傾角調整方法及裝置，光學讀取頭的 傾角調整參數在正式讀取光碟上的資訊之前就已經確定 ，且光學讀取頭的實際傾斜調整參數隨著放入光碟的不 同而對應改變。因此，光碟機可高品質的讀取各種不同 扭曲的光碟上的資訊，增強讀碟能力，提高讀碟品質。 【實施方式】 [0016] 請參閱圖1，其為較佳實施例之光碟機的架構圖，光碟機 10包括光學讀取頭100、馬達120、馬達控制器140和傾 角調整裝置160。其中，光學讀取頭100用於藉由光束的 095144694 表單编號A0101 第6頁/共23頁 1003397670-0 1362659 100年10月26日核正替換頁 發射和接收讀取光碟200上的資訊，同時還藉由檢測接收 之光束之變化生成聚焦誤差訊號（Focus Error)。馬 達120用於帶動光學讀取頭10 0沿光碟20 0之徑向方向移 動，以使光學讀取頭100讀取光碟200上不同轨道的資訊 。馬達控制器140用於控制馬達120的轉動，進而控制光 學讀取頭100在光碟200的徑向方向上的移動速度和方向 。傾角調整裝置160用於接收光學讀取頭100產生的聚焦 誤差訊號，生成傾角調整訊號並發送至光學讀取頭100。 光學讀取頭1〇〇在讀取過程中，根據該傾角調整訊號調整 光束的發射角度。 [0017] 上述聚焦誤差訊號可以係藉由光學讀取頭100中的四象儀 接收反射光束，在該四象儀的四個象限會分別輸出相對 於其所接收光強度的電流訊號，再將該電流訊號轉換成 電壓訊號來計算出聚焦誤差訊號。由於光碟200表面不同 區域的平整度有所不同，所以在讀取光碟200上之資訊期 間會產生複數不同的聚焦誤差訊號。光碟機10將光碟劃 分成複數等份，在讀取光碟200上的資訊之前，先藉由光 學讀取頭100檢測在讀取光碟20 0各個等份中分別產生之 聚焦誤差訊號，然後根據該聚焦誤差訊號計算出光碟200 各等份中光學讀取頭100應該傾斜的角度之複數傾角調整 參數。當光碟機10讀取該光碟200時，光學讀取頭100根 據當前所讀取的光碟200之等份，調用傾角調整裝置160 在先存儲之對應的傾角調整參數，調整光學讀取頭100之 傾斜角度，以提高光碟機10之讀碟品質，增強讀取能力 095144694 表單編號A0101 第7頁/共23頁 1003397670-0 ^0/()59 [0018] [0019] [0020] [0021] [0022] [0023] 1100年 10月 26 凊同時參閱圖2 ,其為一較佳實施例之光學讀取頭loo傾 角調整方法的流程圖’包括如下步驟： 步驟S307，記錄光學讀取頭1〇〇從光碟2〇〇最内圈到最外 圈所產生的當前聚焦誤差訊號。此過程並不讀取光碟2〇〇 上的資訊，而係藉由馬達120帶動光學讀取頭1〇〇從光磲 200最内圈到最外圈移動，將光碟2〇〇劃分成複數等份， 並選擇各等份中特定之採樣點進行檢測。 步驟S309，根據所述當前聚焦誤差訊號，生成當前傾角 調整參數。 步驟S311，根據所述當前傾角調整參數和預設之初始傾 - 角調整參數，生成實際傾角調整參數。所述初始傾角調 整參數為在光碟機10出廠前，藉由讀取平整玻璃片，纪 錄光學讀取頭100從該平整玻璃片最内圈到最外圈所產生 之初始聚焦誤差訊號，再根據該初始聚焦誤差訊號生成 之初始傾角調整參數，並存儲於光碟機10中之存儲單元 中*讀取平整玻璃片與讀取光碟200之方式相同，該初始 傾角調整參數用於補償光碟機1〇的機構件之傾斜誤差。 由於出廠後的光碟機10係採用默認初始傾角調整參數對 光學讀取頭100進行傾角調整後再進行資訊讀取。所以， 光碟機10在讀取光碟200時測得之當前傾角調整參數係在 初始傾角調整參數基礎上進—步需要調整之參數。因此 ，實際需要調整的傾斜角度係初始傾角調整參數和告前 傾角調整參數之結合。 步驟S313，存儲所述實際傾角調整參數。 095144694 表單编號A0101 第8頁/共23頁 1003397670-0 I36Z659 100年.10月26日梭正替換頁 [0024] 步驟S315，光碟機1〇讀取光碟2〇〇上之資訊時根據所 述實際傾角調整參數調整光學讀取頭1〇〇的傾斜角度以 更好的讀取光碟2〇〇上之資訊。 [0025] 在記錄光學讀取頭100從平整玻璃片或光碟200最内圈到 最外圈所產生的聚焦誤差訊號之步驟中，為了減少聚焦 誤差訊號的資訊量以及縮短該步驟所需要之時間，本實 施例將平整玻璃片和光碟200從最内圈到最外圈平均分成 五份，即從内到外選擇六個採樣點（如圖丨所示）。後續 根據這六個聚焦誤差訊號生成六個傾角調整參數，再採 用疊代運算法將這六個傾角調整參數換算成二十二個傾 角調整參數，即將光碟分成二十二個區域，以使二十二 個傾角調整參數分別適用光碟上二十二個不同區域。所 述疊代運算法的具體步驟如下所示，並同時參閱圖3和圖 4。圖3中光碟200、平整玻璃片3〇〇和絕對水平線5〇〇形 成一定夾角，且具有共同起點，該起點即為光碟之内圈 邊緣。 [0026] 假設讀取平整玻璃片300所產生的六個初始傾角調整參數 為tmp[i] ， i=〇~5 〇 [0027] 假設測量光碟200所產生的六個聚焦誤差參數，經計算生 成的六個當前傾角調整參數為Fdo[i]，i = 〇~5，則： F[0]=Fdo[0]-trap[0] t_da[0]=F[0]-F[0] F[1]=Fdo[1]-trap[1] t_da[l]=F[l]-F[0] F[2]=Fdo[2]-tmp[2 ] t_da[2]=F[2]-F[0] F[3]=Fdo[3]-tmp[3] t_da[3]=F[3]-F[0] 表單編號A0101 第9頁/共23頁 1003397670-0 095144694 1362659 100年10月26日修正替換頁 F[4]=Fdo[4]-tmp[4] t_da[4]:F[4]-F[0 ] F[5]=Fdo[5]-tmp[5] t_da[5]=F[5]-F[0] 上述F[i]，i=0~5，表示_間參數，t_da[ i ]表示光碟 200之水平參數。根據當前傾角調整參數換算得到之換算 係數ra=(sigma*( Fdo[5]-Fdo[0]))/1 000，其中， sigma為實驗所得的微調參數值，除以1000係為了後續 的計算精度。請參閱圖4,中間參數dac_[ j](卜0~4)為 [0029] dac_[0]= (t_da[1]-t_da[0])木（5*sigma)+(m木1000) [0030] dac_[l] = (t_da[2]-t_da[l])木 (5*sigma)+(m*1000) [0031] dac_[2] = (t_da [ 3 ] - t_da [ 2 ] ) * (5木sigma)+(m木1000) [0032] dac_[3] = (t—da[4]-t 一 da[3])木 (5*sigma)+(m*1000) [0033] dac_[4] = (t_da[5]-t_da[4] )* (5木sigma)+(m*1000) [0034] 疊代參數kn = (dac_[n + l ]-dac_[n])/4，（n = 0〜3)其中 除以4表示根據每個kn計算出四個傾角調整參數。採用疊 代運算法換算後之二十二個實際傾角調整參數TILT[P]， p = 0〜21如下所示： [0035] TILT[0]~TILT[3] = 095144694 表單编號A0101 第10頁/共23頁 1003397670-0 I36Z659 [0036] [0037] [0038] [0039] [0040] [0041] [0042] [0043] [0044] [0045] [0046] [0047] [0048] 100年10月26日梭正替換頁 (((t_da[l]-t_da[0])*(5*sigma)+(ra*l000))+500) /1000; TILT[4]=(dac_[0]+500)/1000; TILT[5]=((k〇*l+dac_[01)+500)/1000; TILT[6]=((k〇*2+dac_[0])+500)/1000; TILT[7]=((k〇*3+dac_[0])+500)/1000; TILT[8]=(dac_[l]+500)/1000； TILT[9]=((k1*l+dac_[l])+500)/1000； TILT[10]=((k1*2+dac_[1])+500)/1000； TILT[11]=((k1*3+dac_[l])+500)/1〇〇〇； TILT[19] = ((k3*3 + dac_[3]) + 500 )/ 1 〇〇〇 ; TILT[20]~TILT[21 ]= ((t_da[5]-t一da[4])木（5*sigma)+(m*i〇〇〇)+5〇〇)/工 000; 如上式所述及圖4所示，疊代運算法得出之每四個傾角調 整參數均需由其前後的當前傾角調整參數換算得出則 二十二個實際傾角調整參數中的前四個以及最後的二個 未採用疊代運算法計算。 光碟機10讀取光碟200上的資訊時，則係_取到某個區 域時’則該區域對應的實際傾肖難參數進行傾角 095144694 表單編號A0101 第11頁/共23頁 1003397670-0 1362659 ___ 100年10月26日修正替换頁 調節。使得光學讀取頭100的傾角調整參數在正式讀取資 訊之前就已經確定，且光學讀取頭100的實際傾斜調整參 數隨著放入光碟200不同而對應改變。因此，光碟機10可 高品質地讀取各種不同扭曲之光碟200上的資訊。又因為 上述傾角調整方法藉由測量的六點傾角調整參數，再利 用疊代運算將其換算成二十二個實際傾角調整參數，使 光碟機10即可以短時間的完成檢測工作，又能精確的調 節光學讀取頭100之傾斜角度。其中，採樣點之數量以及 換算後的傾角調整參數之數量可以變化，採樣點之數量 通常為3~10個，換算後之傾角調整參數之數量大於所述 採樣點之數量。 [0049] 請參閱圖5，其為光碟機10的功能框圖，光碟機10包括光 學讀取頭100、馬達120、馬達控制器140和傾角調整裝 置160。其各自的功能已在前面進行了介紹，不再贅述。 [0050] 光學讀取頭100包括物鏡102、致動器104和誤差檢測器 106。其中，物鏡102用於將雷射光束聚焦到光碟200的 資訊層上。致動器104用於帶動物鏡102移動，進而控制 雷射光束與光碟200表面之相對角度。誤差檢測器106用 於接收從光碟200表面反射回來之光束，產生光束在光碟 20 0表面之當前聚焦誤差訊號。 [0051] 傾角調整裝置160包括記憶體162、移動訊號發生單元 164、接收單元166、處理單元168、暫存器170和發送單 元172。記憶體162用於存儲出廠前光碟機10讀取平整玻 璃片300所記錄的六個初始傾角調整參數。移動訊號發生 單元164用於在光碟機10讀取光碟200上資訊之前，發送 095144694 表單编號A0101 第12頁/共23頁 1003397670-0 1362659 100年10月26日核正替换頁 移動訊號給馬達控制器140，馬達控制器140接收該移動 訊號後控制馬達120轉動，從而帶動光學讀取頭100沿光 碟200之徑向方向在預設的六個採樣點上移動，以獲取對 應之六個聚焦誤差資訊。接收單元166用於接收光學讀取 頭100之誤差檢測器106產生六個當前聚焦誤差訊號，並 傳送給處理單元168。處理單元168根據記憶體162中之 六個初始傾角調整參數以及接收的六個當前聚焦誤差訊 號，生成二十二個實際傾角調整參數，並傳送至暫存器 170。 [0052] 處理單元168包括訊號處理模組180、參數計算模組182 和換算模組184。訊號處理模組180用於根據所述當前聚 焦誤差訊號，生成當前傾角調整參數，並傳送給參數計 算模組182。參數計算模組182用於根據記憶體162中的 六個初始參數調整參數和六個所述當前傾角調整參數， 生成六個實際傾角調整參數，並傳送給換算模組184。換 算模組1 84用於根據疊代運算法將該六個實際傾角調整參 數換算成二十二個實際傾角調整參數，並發送給暫存器 170，具體換算方式及過程如前所述，不再贅述。 [0053] 暫存器170用於暫存所述二十二個實際傾角調整參數，該 二十二個實際傾角調整參數係適合當前光碟200之表面平 整特性之傾角調整參數，若更換光碟200，則重新進行上 述測試存儲過程，並以新的傾角調整參數覆蓋暫存器170 内之傾角調整參數。發送單元172用於發送暫存器170内 之實際傾角調整參數給光學讀取頭100之致動器104，以 控制物鏡102之轉動，使得光束總能垂直之入射在光碟 095144694 表單編號A0101 第13頁/共23頁 1003397670-0 1362659 _ 100年Ϊ0月26日核正替換頁 2 0 0表面。 [0054] 上述光碟機10欲讀取光碟200上的資訊時，將光碟200視 為二十二等份之環狀區域，在讀取之前就先藉由傾角調 整裝置160確定光碟200適合之傾角調整參數，當光學讀 取頭100讀取到某個區域時，調用該區域對應之傾角調整 參數進行傾角調節。因此，光碟機10可高品質的讀取各 種不同扭曲之光碟200上的資訊。又因為上述光碟機10藉 由測量的六點傾角調整參數，再利用疊代運算將其換算 成二十二個實際傾角調整參數，使光碟機1 〇既可以短時 間完成檢測工作，又能精確的調節光學讀取頭100之傾斜 角度。上述傾角調整方法和傾角調整裝置不僅僅適用於 光碟之讀取，同樣還適合光碟之寫入。其中，採樣點之 數量以及換算後的傾角調整參數的數量可以變化，採樣 點之數量通常為3〜10個，換算後之傾角調整參數的數量 大於所述採樣點之數量，以適用光碟200上的不同區域。 【圖式簡單說明】 [0055] 圖1為一較佳實施例之光碟機的架構圖。 [0056] 圖2為一較佳實施例之光學讀取頭傾角調整方法流程圖。 [0057] 圖3為疊代運算法中光碟與平整玻璃片參數示意圖。 [0058] 圖4為疊代運算法中光碟採樣點示意圖。 [0059] 圖5為圖1所示的光碟機之功能框圖。 【主要元件符號說明】 [0060] 光碟機：10 095144694 表單编號Α0101 第14頁/共23頁 1003397670-0 I36Z659 [0061] 接收單元：166 [0062] 光學讀取頭：1〇〇 [0063] 處理單元：168 [0064] 物鏡：102 [0065] 暫存器：170 [0066] 致動器：104 [0067] 發送單元：172 [0068] 誤差檢測器：106 [0069] 訊號處理模組：180 [0070] 馬達：120 [0071] 參數計算模組：182 [0072] 馬達控制器：140 [0073] 換算模組：184 [0074] 傾角調整裝置：160 [0075] 光碟：200 [0076] 存儲器：162 [0077] 平整玻璃片：300 [0078] 移動訊號發生單元：164 [0079] 絕對水平：500 095144694 表單编號A0101 第15頁/共23頁 100年10月26日梭正替换頁 1003397670-0 1362659 100年10月26日核正替換頁 [0080] 光學讀取頭傾角調整方法流程步驟：S307-S315 095144694 表單编號A0101 第16頁/共23頁 1003397670-0BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc drive, and more particularly to an optical disc drive. A method and apparatus for adjusting the inclination of an optical pickup. [Prior Art] Based on the characteristics of large storage capacity and convenient storage of optical discs, optical disc drives and optical discs are widely used in people's work and life. The CD player reads the information on the disc or burns the information onto the disc by its internal optical pickup. Generally, the optical disk drive includes a spindle motor that drives the rotation of the optical disk, and a stepping motor that drives the optical pickup to move in the radial direction of the optical disk to perform a read/write operation on the optical disk. The main components of the optical pickup of the optical disk drive include: a laser diode, an objective lens, a photodetector, an actuator, and the like. Taking the information on the optical disc as an example, the light beam emitted by the laser diode is focused by the objective lens onto the information layer of the optical disc, and the photodetector receives the light beam reflected from the optical disc and analyzes the reflected light beam. Get the information on the disc. Since the information track on the optical disc is very tight, the accuracy of the beam focusing on the information track is very high. It is usually required that the distance between the optical pickup and the optical disc should remain constant during the reading process, and the light beam should remain perpendicular to the surface of the optical disc. The optical pickup is mounted on two parallel slides that are moved in the direction of the slide by the traction of the motor. However, in the production process of the optical disc drive, due to the dimensional error of the slide member and the optical component and the deviation of the optical component in the optical pickup, the moving direction of the optical pickup is inclined to a certain angle with the surface of the optical disc, thereby causing optical The beam from the read hair cannot be directed perpendicularly to the surface of the disc, affecting the quality of the disc. To this end, the disc form number A0101 page 4/23 pages 1003397670-0 1362059 100 years. October 26th revised replacement page [0006] [0007] [0009] [0010] [0011] 095144694 The tilting of the optical pickup is required before leaving the factory. The traditional tilting angle adjustment enables the optical pickup to move parallel to the optical disc by reading the flat glass sheet and adjusting the height of one end of the slide rail according to the error information generated during reading. quality. However, the source of the ordinary user's optical disc is complicated. Due to the quality problem or aging of the optical disc itself, the flatness of the surface of the optical disc may be lowered, the warpage may occur, and the degree of warpage of different optical discs may be different. As a result, the tilt angle of the originally adjusted optical pickup is no longer suitable for such a disc, resulting in a deterioration in the quality of the reading disc or even reading. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a tilt adjustment method for an optical pickup that can be applied to a plurality of optical discs. It is also necessary to provide a tilt adjustment device for an optical pickup that can be used with a variety of optical discs. An optical read head tilt adjustment method includes the following steps: recording a current focus error signal generated by an optical pickup from an inner ring to an outer ring of the optical disc; generating an actual according to the current focus error signal and a preset initial tilt adjustment parameter The tilt adjustment parameter, wherein the initial tilt adjustment parameter is an initial focus error signal generated by the optical pickup from the innermost circumference to the outermost circumference of the flat glass sheet by reading the flat glass sheet before the optical disc drive leaves the factory. And generating and storing in the storage unit of the optical disc drive according to the initial focus error signal; storing the actual tilt adjustment parameter; Form No. A0101 Page 5 of 23, 1003397670-0 [0012] 1362659 _ October 26, 100 Correcting Replacement Page [0013] When reading information on the optical disc or writing information onto the optical disc, the tilt angle of the optical pickup is adjusted according to the actual tilt adjustment parameter. [0014] An optical pickup tilt adjustment apparatus includes a memory, a receiving unit, a processing unit, a register, and a transmitting unit. The memory is used for storing a preset initial tilt adjustment parameter, wherein the initial tilt adjustment parameter is recorded from the innermost circle of the flat glass sheet by reading the flat glass sheet before the optical disc drive leaves the factory. The initial focus error signal generated by the outer ring is generated according to the initial focus error signal and stored in the storage unit of the optical disk drive. The receiving unit is configured to receive a current focus error signal generated by the optical pickup to read the optical disc. The processing unit is configured to generate an actual tilt adjustment parameter according to the initial tilt adjustment parameter and the current focus error signal. The register is used to temporarily store the actual tilt adjustment parameter generated by the processing unit. The transmitting unit is configured to send the actual tilt adjustment parameter in the register to the optical pickup when the optical pickup reads the information on the optical disc to adjust the laser of the optical reading hair The angle of the beam. [0015] With the above-described read head tilt adjustment method and apparatus, the tilt adjustment parameter of the optical pickup is determined before the information on the optical disc is officially read, and the actual tilt adjustment parameter of the optical pickup is placed along with The corresponding change to the disc is changed. Therefore, the optical disc player can read information on various distorted discs with high quality, enhance the ability to read discs, and improve the quality of reading discs. [Embodiment] [0016] Please refer to FIG. 1, which is a structural diagram of an optical disk drive of a preferred embodiment. The optical disk drive 10 includes an optical pickup 100, a motor 120, a motor controller 140, and a tilt adjustment device 160. Wherein, the optical pickup 100 is used to transmit and receive the information on the reading disc 200 by the light beam of 095144694 Form No. A0101, Page 6 of 23, 1003397670-0 1362659, October 26, 100. At the same time, a focus error signal is generated by detecting a change in the received beam. The motor 120 is used to drive the optical pickup 10 to move in the radial direction of the optical disk 20 to enable the optical pickup 100 to read information of different tracks on the optical disk 200. The motor controller 140 is for controlling the rotation of the motor 120, thereby controlling the moving speed and direction of the optical pickup 100 in the radial direction of the optical disc 200. The tilt adjusting device 160 is configured to receive the focus error signal generated by the optical pickup 100, generate a tilt adjustment signal, and transmit the tilt adjustment signal to the optical pickup 100. The optical pickup 1 adjusts the emission angle of the beam according to the tilt angle during reading. [0017] The focus error signal may receive the reflected beam by the four-imager in the optical pickup 100, and the four quadrants of the four-imager respectively output current signals relative to the received light intensity, and then The current signal is converted into a voltage signal to calculate a focus error signal. Since the flatness of different areas of the surface of the optical disc 200 is different, a plurality of different focus error signals are generated during the reading of the information on the optical disc 200. The optical disc drive 10 divides the optical disc into a plurality of equal parts. Before reading the information on the optical disc 200, the optical read head 100 detects the focus error signals respectively generated in the aliquots of the read optical discs 20, and then according to the The focus error signal calculates a plurality of tilt adjustment parameters of the angle at which the optical pickup 100 should be tilted in each of the discs 200. When the optical disc drive 10 reads the optical disc 200, the optical pickup 100 adjusts the corresponding tilt adjustment parameter stored by the tilt adjustment device 160 according to the aliquot of the currently read optical disc 200, and adjusts the optical pickup 100. Tilt angle to improve the quality of the disc of the disc player 10, enhance the reading ability 095144694 Form No. A0101 Page 7 / Total 23 Page 1003397670-0 ^0 / () 59 [0018] [0019] [0020] [0021] [0023] [0023] October 26, 1100, while referring to FIG. 2, a flow chart of a method for adjusting the tilt angle of the optical pickup loo according to a preferred embodiment includes the following steps: Step S307, recording the optical pickup 1〇当前 The current focus error signal generated from the innermost circle to the outermost circle of the disc 2〇〇. This process does not read the information on the optical disc 2, but drives the optical pickup 1 by the motor 120 to move from the innermost circumference to the outermost circumference of the aperture 200, and divides the optical disc 2 into plural numbers. And select the specific sampling points in each aliquot for testing. Step S309, generating a current tilt adjustment parameter according to the current focus error signal. Step S311, generating an actual tilt adjustment parameter according to the current tilt adjustment parameter and a preset initial tilt-angle adjustment parameter. The initial tilt adjustment parameter is an initial focus error signal generated by the optical pickup 100 from the innermost circumference to the outermost circumference of the flat glass sheet by reading the flat glass sheet before the optical disc drive 10 is shipped from the factory. The initial tilt adjustment signal generated by the initial focus error signal is stored in the storage unit in the optical disc drive 10. * The flat glass sheet is read in the same manner as the read optical disc 200. The initial tilt adjustment parameter is used to compensate the optical disc drive. Tilt error of the machine component. Since the optical disc drive 10 after the factory performs the tilt adjustment of the optical pickup 100 using the default initial tilt adjustment parameter, information reading is performed. Therefore, the current tilt adjustment parameter measured by the optical disc drive 10 when reading the optical disc 200 is a parameter that needs to be adjusted based on the initial tilt adjustment parameter. Therefore, the actual tilt angle to be adjusted is a combination of the initial tilt adjustment parameter and the pre-tilt adjustment parameter. Step S313, storing the actual tilt adjustment parameter. 095144694 Form No. A0101 Page 8 of 23 1003397670-0 I36Z659 100 years. October 26th Shuttle Replacement Page [0024] Step S315, when the disc player 1〇 reads the information on the disc 2 The actual tilt adjustment parameter adjusts the tilt angle of the optical pickup 1〇〇 to better read the information on the disc 2〇〇. [0025] In the step of recording the focus error signal generated by the optical pickup 100 from the flattened glass sheet or the innermost circumference to the outermost circumference of the optical disc 200, in order to reduce the amount of information of the focus error signal and shorten the time required for the step In this embodiment, the flat glass sheet and the optical disc 200 are equally divided into five parts from the innermost circumference to the outermost circle, that is, six sampling points are selected from the inside to the outside (as shown in FIG. Subsequent generation of six inclination adjustment parameters according to the six focus error signals, and then using the iterative algorithm to convert the six inclination adjustment parameters into twenty-two inclination adjustment parameters, that is, dividing the optical disc into twenty-two regions, so that two Twelve dip adjustment parameters apply to twenty-two different areas on the disc. The specific steps of the iterative algorithm are as follows, and see also Figures 3 and 4. In Fig. 3, the optical disc 200, the flat glass sheet 3〇〇 and the absolute horizontal line 5〇〇 form a certain angle and have a common starting point, which is the inner ring edge of the optical disc. [0026] It is assumed that the six initial tilt adjustment parameters generated by reading the flat glass sheet 300 are tmp[i], i=〇~5 〇[0027] It is assumed that the six focus error parameters generated by the optical disc 200 are calculated and generated. The six current dip adjustment parameters are Fdo[i], i = 〇~5, then: F[0]=Fdo[0]-trap[0] t_da[0]=F[0]-F[0] F [1]=Fdo[1]-trap[1] t_da[l]=F[l]-F[0] F[2]=Fdo[2]-tmp[2 ] t_da[2]=F[2] -F[0] F[3]=Fdo[3]-tmp[3] t_da[3]=F[3]-F[0] Form No. A0101 Page 9 of 23 1003397670-0 095144694 1362659 100 years Correction replacement page F[4]=Fdo[4]-tmp[4] t_da[4]:F[4]-F[0 ]F[5]=Fdo[5]-tmp[5] t_da [5]=F[5]-F[0] The above F[i], i=0~5, represents the _ parameter, and t_da[i] represents the horizontal parameter of the optical disc 200. The conversion factor ra=(sigma*( Fdo[5]-Fdo[0]))/1 000 according to the current inclination adjustment parameter conversion, where sigma is the experimentally obtained fine adjustment parameter value, divided by 1000 series for subsequent calculation Precision. Referring to Figure 4, the intermediate parameter dac_[ j] (Bu 0~4) is [0029] dac_[0]= (t_da[1]-t_da[0]) wood (5*sigma)+(m wood 1000) [ 0030] dac_[l] = (t_da[2]-t_da[l]) wood (5*sigma)+(m*1000) [0031] dac_[2] = (t_da [ 3 ] - t_da [ 2 ] ) * (5 wood sigma) + (m wood 1000) [0032] dac_[3] = (t-da[4]-t a da[3]) wood (5*sigma)+(m*1000) [0033] dac_ [4] = (t_da[5]-t_da[4] )* (5 wood sigma)+(m*1000) [0034] Iterative parameter kn = (dac_[n + l ]-dac_[n])/4 , (n = 0 to 3) where dividing by 4 means that four inclination adjustment parameters are calculated from each kn. Twenty-two actual tilt adjustment parameters TILT[P] converted by the iterative algorithm, p = 0~21 are as follows: [0035] TILT[0]~TILT[3] = 095144694 Form No. A0101 No. 10 [0048] [0048] [0048] [0048] [0048] [0048] [0048] [0048] [0048] [0048] [0048] [0048] On October 26th, the shuttle is replacing the page (((t_da[l]-t_da[0])*(5*sigma)+(ra*l000))+500) /1000; TILT[4]=(dac_[0] +500)/1000; TILT[5]=((k〇*l+dac_[01)+500)/1000; TILT[6]=((k〇*2+dac_[0])+500)/1000 ; TILT[7]=((k〇*3+dac_[0])+500)/1000; TILT[8]=(dac_[l]+500)/1000; TILT[9]=((k1*l +dac_[l])+500)/1000; TILT[10]=((k1*2+dac_[1])+500)/1000; TILT[11]=((k1*3+dac_[l]) +500)/1〇〇〇; TILT[19] = ((k3*3 + dac_[3]) + 500 )/ 1 〇〇〇; TILT[20]~TILT[21 ]= ((t_da[5] -t a da [4]) wood (5 * sigma) + (m * i 〇〇〇) + 5 〇〇) / work 000; as described above and shown in Figure 4, the iterative algorithm The four inclination adjustment parameters need to be converted from the current inclination adjustment parameters before and after, and the first four of the twenty-two actual inclination adjustment parameters. And the last two are not calculated using iterative algorithms. When the optical disc drive 10 reads the information on the optical disc 200, the system _ takes a certain area, then the actual tilting parameter corresponding to the area is tilted 095144694. Form number A0101 page 11/23 pages 1003397670-0 1362659 ___ Corrected replacement page adjustment on October 26, 100. The tilt adjustment parameter of the optical pickup 100 is determined prior to the official reading of the information, and the actual tilt adjustment parameter of the optical pickup 100 changes correspondingly as it is placed in the disc 200. Therefore, the optical disk drive 10 can read information on various distorted optical discs 200 with high quality. Moreover, since the tilt angle adjustment method adjusts the parameter by the measured six-point tilt angle, and converts it into twenty-two actual tilt angle adjustment parameters by using the iterative operation, the optical disc drive 10 can complete the detection work in a short time, and can accurately Adjusting the tilt angle of the optical pickup 100. The number of sampling points and the number of converted inclination adjustment parameters may vary, and the number of sampling points is usually 3 to 10, and the number of converted inclination adjustment parameters is greater than the number of sampling points. Referring to FIG. 5, which is a functional block diagram of the optical disc drive 10, the optical disc drive 10 includes an optical pickup 100, a motor 120, a motor controller 140, and a tilt adjustment device 160. Their respective functions have been introduced in the previous section and will not be described again. [0050] The optical pickup 100 includes an objective lens 102, an actuator 104, and an error detector 106. The objective lens 102 is used to focus the laser beam onto the information layer of the optical disc 200. Actuator 104 is used to move with the animal mirror 102 to control the relative angle of the laser beam to the surface of the disc 200. The error detector 106 is operative to receive a beam reflected from the surface of the disc 200 to produce a current focus error signal of the beam on the surface of the disc 20. [0051] The reclining device 160 includes a memory 162, a mobile signal generating unit 164, a receiving unit 166, a processing unit 168, a register 170, and a transmitting unit 172. The memory 162 is used to store the six initial tilt adjustment parameters recorded by the CD player 10 before reading the flat glass sheet 300. The mobile signal generating unit 164 is configured to send the 095144694 form number A0101, page 12 of 23, 1003397670-0 1362659, on October 26, 100, before the CD player 10 reads the information on the optical disc 200, and replaces the mobile signal to the motor. The controller 140 controls the motor 120 to rotate after receiving the movement signal, thereby driving the optical pickup 100 to move along the radial direction of the optical disc 200 at preset six sampling points to obtain corresponding six focusing points. Error information. The receiving unit 166 receives the error detector 106 of the optical pickup 100 to generate six current focus error signals and transmits them to the processing unit 168. The processing unit 168 generates twenty-two actual tilt adjustment parameters based on the six initial tilt adjustment parameters and the six received current focus error signals in the memory 162, and transmits them to the register 170. [0052] The processing unit 168 includes a signal processing module 180, a parameter calculation module 182, and a scaling module 184. The signal processing module 180 is configured to generate a current tilt adjustment parameter according to the current focus error signal, and transmit the current tilt adjustment parameter to the parameter calculation module 182. The parameter calculation module 182 is configured to generate six actual tilt adjustment parameters according to the six initial parameter adjustment parameters and the six current tilt adjustment parameters in the memory 162, and transmit the parameters to the conversion module 184. The conversion module 1 84 is configured to convert the six actual inclination adjustment parameters into twenty-two actual inclination adjustment parameters according to the iterative calculation method, and send the parameters to the temporary storage unit 170. The specific conversion method and process are as described above, Let me repeat. The temporary storage device 170 is configured to temporarily store the twenty-two actual tilt adjustment parameters, and the twenty-two actual tilt adjustment parameters are suitable for the tilt adjustment parameter of the surface flatness characteristic of the current optical disc 200, and if the optical disc 200 is replaced, Then the above test stored procedure is re-executed, and the tilt adjustment parameter in the register 170 is overwritten with the new tilt adjustment parameter. The transmitting unit 172 is configured to transmit the actual tilt adjustment parameter in the register 170 to the actuator 104 of the optical pickup 100 to control the rotation of the objective lens 102 so that the light beam can always be incident vertically on the optical disk 095144694. Form No. A0101 No. 13 Page / Total 23 pages 1003397670-0 1362659 _ 100 years Ϊ 0月26日核正 replacement page 2 0 0 surface. [0054] When the optical disc drive 10 is to read the information on the optical disc 200, the optical disc 200 is regarded as an annular region of twenty-two equal parts, and the tilting device 160 determines the suitable tilt angle of the optical disc 200 before reading. The parameter is adjusted. When the optical pickup 100 reads an area, the tilt adjustment parameter corresponding to the area is called to perform the tilt adjustment. Therefore, the optical disk drive 10 can read information on various differently distorted optical disks 200 with high quality. Moreover, since the above-mentioned optical disk drive 10 adjusts the parameters by the measured six-point tilt angle, and converts it into twenty-two actual tilt angle adjustment parameters by using the iterative operation, the optical disk drive 1 can perform the detection work in a short time and can be accurate. Adjusting the tilt angle of the optical pickup 100. The above-described tilt adjustment method and tilt adjustment device are not only suitable for reading a disc, but are also suitable for writing to a disc. The number of sampling points and the number of converted tilt adjustment parameters may vary, and the number of sampling points is usually 3 to 10, and the number of converted tilt adjustment parameters is greater than the number of sampling points to be applied to the optical disc 200. Different areas. BRIEF DESCRIPTION OF THE DRAWINGS [0055] FIG. 1 is a block diagram of an optical disk drive according to a preferred embodiment. 2 is a flow chart of a method for adjusting the tilt angle of an optical pickup according to a preferred embodiment. [0057] FIG. 3 is a schematic diagram of parameters of a disc and a flat glass sheet in an iterative algorithm. 4 is a schematic diagram of a disc sampling point in an iterative algorithm. 5 is a functional block diagram of the optical disk drive shown in FIG. 1. [Main component symbol description] [0060] Optical disk drive: 10 095144694 Form number Α 0101 Page 14 / Total 23 page 1003397670-0 I36Z659 [0061] Receiving unit: 166 [0062] Optical pickup: 1 〇〇 [0063] Processing unit: 168 [0064] Objective lens: 102 [0065] Register: 170 [0066] Actuator: 104 [0067] Transmitting unit: 172 [0068] Error detector: 106 [0069] Signal processing module: 180 [0070] Motor: 120 [0071] Parameter calculation module: 182 [0072] Motor controller: 140 [0073] Conversion module: 184 [0074] Tilt adjustment device: 160 [0075] Disc: 200 [0076] Memory: 162 [0077] Flat glass piece: 300 [0078] Mobile signal generating unit: 164 [0079] Absolute level: 500 095144694 Form number A0101 Page 15 / Total 23 pages 100 years October 26 Shuttle replacement page 1003397670-0 1362659 October 26, 100 nuclear replacement page [0080] optical read head tilt adjustment method flow steps: S307-S315 095144694 Form No. A0101 Page 16 / Total 23 1003397670-0