200826089 九、發明說明： 【發明所屬之技術領域】 π本發明涉及-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、 =鏡、光檢測器、致動器等。以讀取光碟上的資訊為例， :射一極體發出之光束藉由物鏡聚焦到光碟之資訊層上， 光檢測盗則接收從柄上反射回來之光束，並對反射光 進仃分析處理，得到光碟上之資訊。 由於光碟上之資訊執道十分緊密，光束聚焦到資訊執 ^之精度要求很高’通常要求光學讀取頭在讀取過程中 之距離應當保持不變，並且光束應當保持與光碟表 。&學讀取頭係被安裝在二平行滑執上，藉由馬達 出牽引而沿滑執方向移動。然而，在光碟機之生產過程中， ^執等機構件的尺寸誤差以及光學讀取頭中光學元件 傾斜❹使光學讀取頭的移動方向與光碟表面形成一定的 卜又，從而導致光學讀取頭髮出的光束不能垂直射到 5 200826089 光碟表面，影響頃碟品質。 杆本與^ 、 光碟機在出廠前需要造 玻璃片進行讀取，並根據讀取時產生係精由對平整 某 咼低，使光學讀取頭能夠相對光碟平扞 移動，以保證讀取。 順U碟千仃 然而，普通用戶的光碟來源複雜， 質問題或老化都可能使得先碟本身之品 曲現象，平整度降低，出現龜 肩先發生之輕曲程度也不盡相同。如此， 而導致讀碟品質下降，甚至紐讀取。 砰攸 【發明内容】 有鑒於此，有必要提供一種能適用多種光碟之光 取頭之傾角調整方法。 貝 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： 吕己錄光學讀取頭從光碟内圈到外圈所產生之當前聚隹 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表 數，生成實際傾角調整參數； ^ 存儲該實際傾角調整參數； 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。 一種光學讀取頭傾角調整裝置包括記憶體、接收單 200826089 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。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。 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】 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100沿光碟200之徑向方向移 動，以使光學讀取頭100讀取光碟200上不同執道的資訊。 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。 7 200826089 ‘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100在讀取過程中，根據該傾角調整訊號調整光 . 束的發射角度。 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200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。 請同時參閱圖2,其為一較佳實施例之光學讀取頭100 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100從光碟200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 200上的資訊，而係藉由馬達120帶動光學讀取頭1〇〇從 光碟200最内圈到最外圈移動，將光碟200劃分成複數等 8 200826089 -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，記錄 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10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一步需要調整之參數。因 此，實際需要調整的傾斜角度係初始傾角調整參數和當前 傾角調整參數之結合。 步驟S313，存儲所述實際傾角調整參數。 步驟S315，光碟機10讀取光碟200上之資訊時，根 據所述實際傾角調整參數調整光學讀取頭100的傾斜角 度，以更好的讀取光碟200上之資訊。 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 9 200826089 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（如圖工所示）。後續根 據运六個聚焦系差訊·5虎生成六個傾角調整參數，再採用最 代運异法將這六個傾角調整參數換算成二十二個傾角調敕 參數’即將光碟分成二十二個區域，以使二十二個傾角, 整參數分別適用光碟上二十二個不同區域。所述疊代運管 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300和絕對水平線500形成一定夹 角’且具有共同起點，該起點即為光碟之内圈邊緣。 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=0〜5。 假設測量光碟200所產生的六個聚焦誤差參數，經計 鼻生成的六個當前傾角調整參數為Fdo[i]，i=0〜5，則： F[0]=Fdo[0]-tmp[0] F[l]=Fdo[l]-tmp[l] F[2]=Fdo[2]-tmp[2] F[3]=Fdo[3]-tmp[3] F[4]=Fdo[4]-tmp[4] F[5]=Fdo[5]-tmp[5] t—da[0]=F[0]-F[0] t—da[l]=F[l]-F[0] t—da[2]=F[2]-F[0] t^da[3] = F[3]-F[0] t—da[4] = F[4]-F[0] t—da[5]=F[5]-F[0] 上述F[i]，i=0〜5，表示中間參數，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 m===(signia*( Fdo[5]-Fdo[0]))/1000，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dacjj](j=〇〜4)為： 200826089 • dac 一 [0] = (t 一 da[l]-t 一 da[0])*(5*sigma) + (m*1000) dac—[l] = (t一da[2]-t一da[l])* (5*sigma) + (m*1000) 一 dac」2] = (t一da[3]-t一da[2])* (5*sigma) + (m*1000) . dac一[3] = (t一da[4]-t一da[3])* (5*sigma) + (m*1000) dac一[4] = (t—da[5]-t—da[4])* (5*sigma) + (m*1000) 疊代參數1 = (3&(^[11 + 1]-(13(^[11])/4，（11 = 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： TILT[0 卜 TILT[3] = (((t_da[l]-t 一 da[0])*(5*sigma) + (m*l 000))+500)/1000; TILT[4] = (dac 一 [0]+500)/1000; TILT[5] = ((k〇*l + dac__[0])+500)/1000; TILT[6] = ((k〇*2 + dac 一 [0])+500)/1000; TILT[7] = ((k〇*3 + dac 一 [0])+500)/1000; TILT[8] = (dac 一 [1] + 500)/1000; TILT[9] = ((k!*l + dac^[l])+500)/1000; TILT[10] = ((ki*2 + dac_[l])+500)/1000; TILT[ll] = ((k1*3 + dac_[l])+500)/1000; TILT[19] = ((k3*3 + dac—[3])+500)/1000; TILT[20]〜TILT[21] = ((t 一 da[5]-t 一 da[4])*(5*sigma) + (m* 1000) + 500)/1000; 如上式所述及圖4所示，疊代運算法得出之每四個傾 11 200826089 ^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00讀取到 某個區域時，則調用該區域對應的實際傾角調整參數進行 傾角調節。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。 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。 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 12 200826089 •用於接收從光碟200表面反射回來之光束，產生光束在光 碟200表面之當前聚焦誤差訊號。 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 ° 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184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 13 200826089 '170,具體換算方式及過程如前所述，不再贅述。 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200表面。 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10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】 14 200826089 圖1為一較佳實施例之光碟機的架構圖。 圖2為一較佳實施例之光學讀取頭傾角調整方法流程 . 圖。 β 圖3為疊代運算法中光碟與平整玻璃片參數示意圖。 圖4為疊代運算法中光碟採樣點示意圖。 圖5為圖1所示的光碟機之功能框圖。 【主要元件符號說明】 光碟機 10 接收單元 166 光學讀取頭 100 處理單元 168 物鏡 102 暫存器 170 致動器 104 發送單元 172 誤差檢測器 106 訊號處理模組 180 馬達 120 參數計算模組 182 馬達控制器 140 換算模組 184 傾角調整裝置 160 光碟 200 存儲器 162 平整玻璃片 300 移動訊號發生單元 164 絕對水平 500 光學讀取頭傾角調整方法流程步驟 S307f - S315 15200826089 IX. Description of the Invention: [Technical Field] The present invention relates to a disc drive, and more particularly to a method and apparatus for adjusting the tilt angle of an optical pickup of an optical disc drive. [Prior Art] 'Based on the large storage capacity of optical discs and convenient storage, CD players 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, a mirror, a photodetector, an actuator, and the like. Taking the information on the optical disc as an example, the light beam emitted by the polar body is focused on the information layer of the optical disc by the objective lens, and the light detecting theft receives the light beam reflected from the handle, and analyzes and processes the reflected light. Get the information on the disc. Since the information on the disc is very tight, the accuracy of the beam focusing on the information is very high. It is usually required that the distance of the optical pickup during reading should remain the same, and the beam should remain on the disc table. The & read head system is mounted on the two parallel slides and is moved in the sliding direction by the motor pulling. However, in the production process of the optical disc drive, the dimensional error of the optical component and the tilting of the optical component in the optical pickup cause the moving direction of the optical pickup to form a certain amount with the surface of the optical disc, thereby causing optical reading. The beam of hair can't be shot perpendicularly to the surface of the 5 200826089 disc, which affects the quality of the disc. The rod and the optical disc machine need to be made of glass for reading before leaving the factory, and the optical pickup can be moved flat relative to the optical disc according to the generation of the essence, so that the optical pickup can be moved relative to the optical disc to ensure reading. However, the source of the ordinary user's disc is complicated, and the quality problem or aging may cause the quality of the first disc itself to be reduced, and the degree of flatness is reduced. In this way, the quality of the reading disc is degraded, and even the new reading.砰攸 [Summary of the Invention] In view of the above, it is necessary to provide a tilt adjustment method for a light take-up head 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. The method for adjusting the tilt angle of the optical pickup comprises the following steps: the current convergence error signal generated by the optical read head of the optical recording head from the inner ring to the outer ring of the optical disc; adjusting according to the current focus error signal and the preset initial tilt angle The number of tables, the actual tilt adjustment parameter is generated; ^ the actual tilt adjustment parameter is stored; when the information on the optical disc is read or the information is written onto the optical disc, the tilt angle of the optical read head is adjusted according to the actual tilt adjustment parameter . An optical pickup tilt adjustment device includes a memory, a receiving unit 200826089, a processing unit, a register, and a transmitting unit. This memory is used to store the preset initial tilt adjustment parameters. 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. 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 on the optical disc. Different and corresponding changes. Therefore, the optical disc player can read information on various differently twisted discs with high quality, enhance the ability to read discs, and improve the quality of reading discs. [Embodiment] 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. The optical pickup 100 is used to read information on the optical disc 200 by transmitting and receiving the light beam, and also generates a focus error signal by detecting a change in the received light beam. The motor 120 is used to drive the optical pickup 100 to move in the radial direction of the optical disc 200, so that the optical pickup 100 reads different information on the optical disc 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. 7 200826089 ‘The tilt adjustment device 160 is configured to receive the focus error signal generated by the optical pickup 100, generate a tilt adjustment signal, and transmit it to the optical pickup 100. The light-learning read head 100 adjusts the emission angle of the light beam according to the tilt angle adjustment signal during reading. The focus error signal may be received 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 signals are respectively output. Converted into a voltage signal to calculate the 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 respective aliquots of the read optical disc 200, and then according to the focus. The error signal calculates a plurality of dip adjustment parameters for 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 previously stored by the reclining device 160 according to the aliquot of the currently read optical disc 200, and adjusts the optical pickup 100. The tilt angle is used to improve the reading quality of the optical disc drive 10 and enhance the reading capability. Please refer to FIG. 2 , which is a flowchart of a method for adjusting the tilt angle of the optical pickup 100 according to a preferred embodiment, including the following steps: Step S307 , recording the optical pickup 100 from the innermost circumference to the outermost circumference of the optical disc 200 The current focus error signal produced. The process does not read the information on the optical disc 200, but the optical pickup head 1 is driven by the motor 120 to move from the innermost circumference to the outermost circumference of the optical disc 200, and the optical disc 200 is divided into a plurality of 2008 2008089-parts. And select specific sampling points in each aliquot for testing. Step S309, generating a current tilt-angle adjustment parameter according to the current focus error signal. Step S311: Generate an actual tilt adjustment parameter according to the current tilt adjustment parameter and the preset initial tilt 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, and then according to The initial tilt adjustment signal generated by the initial focus error signal is stored in a memory unit in the optical disk drive 10. The flat glass sheet is read in the same manner as the optical disc 200, and the initial tilt adjustment parameter is used to compensate for the tilt error of the mechanism of the optical disc drive 10. Since the optical disc drive 10 after the factory adopts the default initial tilt adjustment parameter, the optical pickup 100 is tilt-adjusted and then information is read. Therefore, the current tilt adjustment parameter measured by the optical disc drive 10 when the optical disc 200 is read is a parameter that needs further adjustment 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 current tilt adjustment parameter. Step S313, storing the actual tilt adjustment parameter. In step S315, when the optical disc drive 10 reads the information on the optical disc 200, the tilt angle of the optical pickup 100 is adjusted according to the actual tilt adjustment parameter to better read the information on the optical disc 200. In the step of recording the focus error signal generated by the optical pickup 100 from the flattened glass sheet or the innermost loop to the outermost loop 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, 9 200826089 The example divides the flat glass and disc 200 from the innermost circle to the outermost circle into five equal parts, that is, six sampling points are selected from the inside to the outside (as shown in the figure). According to the six focus system, the 5 tigers generate six inclination adjustment parameters, and then use the most different method to convert the six inclination adjustment parameters into twenty-two inclination parameters. The area is such that twenty-two dip angles and the entire parameters are applied to twenty-two different areas on the disc. The specific steps of the iterative transport method are as follows, and see also Figures 3 and 4. In Fig. 3, the optical disc 200, the flat glass sheet 300, and the absolute horizontal line 500 form a certain angle ' and have a common starting point, which is the inner ring edge of the optical disc. It is assumed that the six initial tilt adjustment parameters produced by reading the flat glass sheet 300 are tmp[i], i = 0 to 5. Assuming that the six focus error parameters generated by the optical disc 200 are measured, the six current tilt adjustment parameters generated by the counterfeit are Fdo[i], i=0~5, then: F[0]=Fdo[0]-tmp[ 0] F[l]=Fdo[l]-tmp[l] F[2]=Fdo[2]-tmp[2] F[3]=Fdo[3]-tmp[3] F[4]=Fdo [4]-tmp[4] F[5]=Fdo[5]-tmp[5] t-da[0]=F[0]-F[0] t-da[l]=F[l]- F[0] t—da[2]=F[2]-F[0] t^da[3] = F[3]-F[0] t—da[4] = F[4]-F[ 0] t_da[5]=F[5]-F[0] The above F[i], i=0~5, represents the intermediate parameter, and t_da[i] represents the horizontal parameter of the optical disc 200. According to the current inclination adjustment parameter conversion conversion coefficient m ===(signia*( Fdo[5]-Fdo[0]))/1000, where sigma is the experimentally obtained fine tuning parameter value, divided by 1000 series for subsequent calculation accuracy. Referring to Figure 4, the intermediate parameter dacjj](j=〇~4) is: 200826089 • dac a[0] = (t a da[l]-t a da[0])*(5*sigma) + (m *1000) dac—[l] = (t_da[2]-t一da[l])* (5*sigma) + (m*1000) a dac”2] = (t_da[3]- t一da[2])* (5*sigma) + (m*1000) . dac一[3] = (t一da[4]-t一da[3])* (5*sigma) + (m *1000) dac_[4] = (t-da[5]-t-da[4])* (5*sigma) + (m*1000) iterative parameter 1 = (3&(^[11 + 1 ]-(13(^[11])/4,(11 = 0~3) where dividing by 4 means that four inclination adjustment parameters are calculated according to each kn. Twenty-two actual conversions by the iterative algorithm The tilt adjustment parameter TILT[p], p=0~21 is as follows: TILT[0 卜TILT[3] = (((t_da[l]-t a da[0])*(5*sigma) + (m *l 000))+500)/1000; TILT[4] = (dac -[0]+500)/1000; TILT[5] = ((k〇*l + dac__[0])+500)/1000 ; TILT[6] = ((k〇*2 + dac a[0])+500)/1000; TILT[7] = ((k〇*3 + dac a[0])+500)/1000; TILT [8] = (dac -[1] + 500)/1000; TILT[9] = ((k!*l + dac^[l])+500)/1000; TILT[10] = ((ki*2 + dac_[l])+500)/1000; TILT[ll] = ((k1*3 + dac_[l])+500)/1000; TILT[ 19] = ((k3*3 + dac-[3])+500)/1000; TILT[20]~TILT[21] = ((t ada[5]-t a da[4])*(5 *sigma) + (m* 1000) + 500)/1000; as shown in the above formula and shown in Figure 4, every four tilts obtained by the iterative algorithm 11 200826089 ^ angular adjustment parameters are required from the current tilt angle If the adjustment parameters are converted, the first four and the last two of the twenty-two actual inclination adjustment parameters are not calculated by the iterative algorithm. When the optical disc drive 10 reads the information on the optical disc 200, when the system 00 reads an area, the actual tilt adjustment parameter corresponding to the area is called to adjust the tilt angle. 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 the dip adjustment parameters after the conversion may vary, and the number of sampling points is usually 3 to 10, and the number of the dip adjustment parameters after conversion is greater than the number of the sampling points. Referring to FIG. 5, which is a functional block diagram of the optical disk drive 10, the optical disk 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. 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. Error Detector 106 12 200826089 • For receiving a beam reflected from the surface of the disc 200, generating a current focus error signal of the beam on the surface of the disc 200. The reclining device 160 includes a memory 162, a mobile signal generating unit, a 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 six initial tilt adjustment parameters recorded by the optical disc player 10 before reading the flat glass sheet 300. The mobile signal generating unit 164 is configured to send a mobile signal to the motor controller 140 before the optical disc drive 10 reads the information on the optical disc 200. After receiving the mobile signal, the motor controller 140 controls the motor 120 to rotate, thereby driving the optical pickup 100 along the optical pickup unit 100. The radial direction of the disc 200 is moved over six preset sampling points to obtain corresponding six focus error information. The receiving unit 166 is configured to receive the error detector 106 of the optical pickup 100 to generate six current focus error signals and transmit them to the processing unit 168. The processing unit 168 generates twenty-two actual tilt adjustment parameters according to the six initial tilt adjustment parameters and the six current focus error signals received in the memory 162, and transmits the data to the register 170. The processing unit 168 includes a signal processing module. Group 180, parameter calculation module 182 and 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 inclination adjustment parameters according to the six initial parameter adjustment parameters and the six current inclination adjustment parameters in the memory 162, and transmit the parameters to the conversion module 184. The conversion module 184 is configured to convert the six actual tilt adjustment parameters into twenty-two actual tilt adjustment parameters according to the iterative algorithm, and send the parameters to the register 13 200826089 '170, and the specific conversion method and process are as described above. ,No longer. 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. 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 perpendicularly on the surface of the optical disc 200. 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 tilt adjustment device 160 determines the suitable tilt adjustment parameter of the optical disc 200 before reading. 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 distorted optical discs 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 10 can perform the detection work in a short time and can accurately. The tilt angle of the optical pickup 100 is adjusted. 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 14 200826089 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. β Figure 3 is a schematic diagram of the parameters of the optical disc and the flat glass in the iterative algorithm. Figure 4 is a schematic diagram of a disc sampling point in the iterative algorithm. Fig. 5 is a functional block diagram of the optical disk drive shown in Fig. 1. [Description of main component symbols] Optical disk drive 10 Receiving unit 166 Optical pickup 100 Processing unit 168 Objective lens 102 Register 170 Actuator 104 Transmitting unit 172 Error detector 106 Signal processing module 180 Motor 120 Parameter calculation module 182 Motor Controller 140 conversion module 184 tilt adjustment device 160 optical disc 200 memory 162 flat glass sheet 300 mobile signal generating unit 164 absolute level 500 optical read head tilt angle adjustment method flow step S307f - S315 15