/ου 玖、發明說明： 【優先權主張】 本申請案係以f 35號美國法典第119條第 n9(e)),^ 年 月11曰申請之美國臨時專利申笮 7453,528號，名稱為「具有增進錢之光學拾訊單'元及 雷：驅動器」以及於簡年3月12曰申請之美國臨時專 1申凊案第60/45UU號，名稱為「具有增進功能之光學 拾訊單元及雷射驅動器」。該每一美國申請案係併 ，供說明參考。 【發明所屬之技術領域】 本發明係關於光學拾訊單元及雷射驅動器，其可用於 各種不同型式之資訊記錄/複製設備，諸如(但不限於)_ 及CD驅動器、DVD攝錄影機、以及DVD錄影機。 【先前技術】/ου 发明, invention description: [Priority claim] This application is the United States Provisional Patent Application No. 7453, 528, filed under US Patent Code 119, n9(e)) For the "Optical Pickup List with the Enhanced Money" and the Ray: Drive" and the US Provisional Patent Application No. 60/45UU, which was filed on March 12th of the Jane Year, is entitled "Optical Pickup with Improved Features" Unit and laser driver". Each of the US applications is for reference. BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to optical pickup units and laser drivers that can be used in a variety of different types of information recording/copying devices such as, but not limited to, _ and CD drives, DVD camcorders, There is also a DVD recorder. [Prior Art]
,雷射驅動器係用於驅動於各種不同型式之資訊記錄/複 製設備（諸如DVD及CD驅動器、DVD攝錄影機、以及MD 錄影機）内之雷射二極體。一般而言，一雷射驅動器係提 供一電流至一雷射二極體，導致該雷射二極體輸出一光訊 號。於該光訊號傳至一光碟媒體之前，該光訊號係藉由一 光學系統（例如包括透鏡、稜鏡及分束器）而適當地聚焦。 由該雷射驅動器（控制該雷射二極體之輸出功率）所提供之 電流大小可依是否該雷射二極體係用於從該光碟媒體讀取 寊料或寫入資料至該光碟媒體而改變。此外，該電流之大 丄 M5780 :、亦可依特定之光碟媒體、DVD或CD標準、及/或讀取資 料及寫入資料之速度而定。 。％境之變動（例如溫度之變動）以及雷射二極體之老化 可影響該雷射二極體之特性（例如門捏電流及斜率效率卜 因此’便有需要精確地控制雷射二極體之功率，以補償該 雷射二極體特性之改變。 』以傳統之方式而t，一雷射驅動器係❺置於一光學拾 λ裝置之上，其係經由一撓性電纜而連接至一主要電路板 ，該撓性電纔可允許該主要電路板與雷射驅動器之間之類 比式連通。一般而言，執行自動功率控制（APC)及運行光學 功率控制⑽PC)之晶片係設置於該主要電路板上。因此， 包含自動功率控制及運行光學功率控制之晶片—般必須經 由撓性電纜傳送及接收串列訊號，以便與該雷射二極體連 通並控制該f射二極體1該等訊號必須於該撓性電禮雙 向來回相當長距離傳送時，該等訊號通常會拾取雜訊或於 到達其目的地前失真。應針對該習知系統加以改I，以便 克服一些上述缺點’而最好是克服所有之上述缺點。 【發明内容】 本發明實施例係關於雷射驅動器及其他相關電路及功 能。根據本發明之-實施例，一驅動一個或更多雷射二極 體之雷射驅動器積體電路⑽C)係包含一自動 (APC)、一運行光學功率控制器⑽pc)以及一寫入策：產： 器觸。該自動功率控制器(Apc)係控制該雷射二極體之 一輸出，以便補償該雷射二極體特性之改變。該運行光學 1345780 功率控制器（R〇PC)係控制該雷射二極體之輸出，以便補償 光學媒體之變化。該寫入策略產生器（ws產生器）係實施二 適當之寫入策略。該雷射驅動器積體電路（LDIC)係設置於 光學拾訊單7L (0PU)上，其係經由一撓性電纜與—主要電 路板連通。根據本發明之一實施例，該自動功率控制器 (APC)與運行光學功率控制器“卯⑺各包含自有之專用偏移 、增盈及取樣保持電路，藉以降低經由撓性電纜傳送於該 光學拾訊單元（0PU)與一主要電路板間之類比訊號之數量。 該雷射驅動器積體電路（UHC)可為一晶片組之部分， 其係設置於一光學拾訊單元（〇Ρϋ)上，該光學拾訊單元可經 由一撓性電纜而與主要電路板上之元件連通。根據本發明 之一實施例，該晶片組亦包含：一功率監視器積體電路 (PMIC)，用以監視該雷射二極體；以及一光偵測器積體電 路（PDIC) ’用以於光線已被光學媒體反射之後偵測由該雷 射二極體所產生之該光線。根據本發明之一實施例，該功 率監視器積體電路（PM 1C)以及該光偵測器積體電路（pd ic) 各包含自有之專用偏移、增益及取樣保持電路。 藉由以下之詳細說明、圖式及申請專利範圍，可更加 了解進一步實施例、本發明之特性、觀點及優點 【實施方式】 圖1係表示根據本發明一實施例之資訊記錄/複製設備 之部分，其包含一主要電路板102、一撓性電纜104以及 一光學拾訊單元（OPU)1〇6。該主要電路板102包含一控制 器108及一類比前端（AFE)llO。該光學拾訊單元（OPU)106 1345780 包含一雷射驅動器積體晶片（LDIC)l 12、一功率監視器積體 晶片（PMIC)114以及該光偵測器積體晶片（PDIC)116。 該雷射驅動器積體晶片（LDIC)112控制至雷射二極體 130及132之電流，導致該雷射二極體體130或132其中 之一輸出一光訊號’該光訊號係被一光學系統（未示出）適 當地聚焦後傳輸至一光碟媒體（未示出）。由該雷射驅動器 積體晶片（LDIC) 112(控制該雷射二極體130或132之輸出 功率）所提供之電流大小可依是否該雷射二極體係用於從 該光碟媒體讀取資料或寫入資料至該光碟媒體而改變。此 外’該電流之大小亦可依特定之光碟媒體、DVD或CD標準 、及/或讀取資料及寫入資料之速度而定。 傳統上，功率控制係於該主要電路板處執行，這需要 於功率控制處理能發生之前經由撓性電纟覽從一光學拾訊單 元傳送高帶寬監視及資訊訊號至該主要電路板。當該等訊 號被傳送至該撓性電纜時，該等訊號會受破壞。根據本發 明一實施例’該雷射驅動器積體晶片（LDIC)112包含一自 動功率控制（APC)部分120、一運行光學功率控制（R〇pc)部 刀122以·及一寫入策略產生器124。因此，就不需要於功 率控制處理能發生之前經由撓性電纜1〇4傳送高帶寬訊號 。進而如以下所詳細說明者，該監視及資訊訊號係於該光 學拾訊單元（0 P U) 1 0 6上產生及受處理（至少用於功率控制） ，以致免除了經由撓性電纜i 〇4連通之需求❶ 圖中所示之雷射驅動器積體晶片（LDIC)112係可驅動 兩個不同之雷射二極體13〇及132。例如，其中一個二極 1345780 體輸出:約78〇nm之波長，其係用於CD技術，且另一雷射 -極體係輸出一約655nm之波長，其係用於議技術。因 =田射驅動器積體晶片（LDIC)U2可被用於CD及/或別D 型式裝置。當然，如果該雷射驅動器積體晶片（LDIC)係僅 配合其中—種型式使用的話，則可使用一單一雷射二極體 。由雷射二極體130及132所輸出之另一實例波長輸出係 為具有約4〇5nm波長之藍-紫光，其係用於藍光（Blu_ray) 技術。該雷射驅動器積體晶片（LDIC)112亦可驅動兩個以 上之雷射二極體。例如，雷射驅動器積體晶片（ldic)ii2 能夠驅動輸出波長為780nm之第一雷射二極體、輸出波長 為655mn之第二雷射二極體以及輸出波長為4〇5nm之第三 田射一極體。當然，該等雷射二極體可輸出其它波長之光 訊號。 §亥寫入策略產生器124係實施一適當寫入策略，其可 依媒體、DVD或CD標準、及/或所支援之速度而定。運行 光學功率控制器（R〇PC)122使用（例如調變）自動功率控制 (APC)訊號，以補償光學媒體之變化。自動功率控制（Αρ〇） 部分12 0控制雷射二極體，以便補償雷射二極體特性的改 變。以下將更詳細地討論該等部分。 在雷射二極體130或132所輸出之光學訊號抵達該光 學媒體之前，一光偵測器134便偵測該訊號，其並提供一 代表所偵測到之強度之訊號給功率監視器積體晶片 (PMIC) 114。比較之下，多重光偵測器136係偵測已從光學 媒體（例如DVD或CD媒體）反射之光學訊號。由光债測器 1345780 136所產生之資訊訊號包括使用者資料（例如回應一主機之 讀取需求而被提供給該主機）、伺服資料（例如用於伺服控 制）以及振幅資訊。由該光偵測器積體晶片（PDIC)U6所產 生之資訊訊號振幅樣本係提供給運行光學功率控制器 (R〇PC)122，其調整自動功率控制（apc)部分中之功率訊號 及電流訊號，以補償該媒體之變化，如以下所討論者。比 較之下，由光偵測器134所產生之訊號樣本係被自動功率 控制（APC)部分1 20所使用，以補償環境之變化及雷射二極 體130及132之老化。 傳統上’具有功率監視及光偵測功能之取樣保持及迴 路補償電路係設置於一主要電路板上，於類比訊號在該主 要電路板上受放大及取樣之前，需要經由一撓性電纜而傳 送該類比訊號。一般而言，於取樣之前，該撓性電纜會使 該等類比訊號失真。如圖1所示，根據本發明之一實施例 ’ s玄功率監視器積體晶片（pMIC)丨丨4及該光偵測器積體晶 片（PDIC)l 16係各包含自己專有之偏移、增益及取樣保持（ 增益/SH)電路126及128。這使得該功率監視器積體晶片 (PMIC)114能放大及取樣由光偵測器134所產生之類比監 視訊號°這亦使得該光偵測器積體晶片（pDIC)1〗6能放大 及取樣由光偵測器丨36所產生之類比資訊訊號。藉由做到 極精微及控制良好之取樣’這種在光學拾訊單元（〇pu)丨〇6 上之放大及取樣工作增加了保真度。此外，由於在取樣之 後該等訊號（經由撓性電纜1 〇4所驅動）係相對上較慢（驅動 慢δίΐ號比驅動一快訊號花費較少之功率），因此便減少 12 1345780 了功率消耗。 由該光偵測器積體晶片（PDIC)U6所產生之資訊訊號 之樣本係經由撓性電纜104而傳送至類比前端（AFE)u〇, 其實施前端訊號處理，諸如轉換類比資料成為數位資料， 並控制聚焦及追蹤伺服迴路。如圖丨所示，該類比前端 110係提供一數位訊號給控制器108。該控制器1〇8可（直 接或經由一或更多之界面電路）與一主電腦及一伺服控制 器連通。 設置於一主要電路板上之習知控制器係傳送一電流控 制訊號給設置於一光學拾訊裝置上之雷射驅動器。根據本 發明之一實施例，控制器i08係經由撓性電纜104傳送功 率控制汛號（而非電流控制訊號）給雷射驅動器積體晶片 112。运是可能的，部份係由於自動功率控制（Apc)部分 120及運行光學功率控制（R〇pc)部分122設置於雷射驅動 器積體晶片（LDIC)l 12之内。當該雷射驅動器積體晶片 (LDIC) 112接收該功率控制訊號時，該自動功率控制部分 及運行光學功率控制部分允許雷射驅動器積體晶片 (LDIC)112決定用於本身之所需電流，以驅動雷射二極體 130 或 132 。 傳統上，由該自動功率控制部分及運行光學功率控制 部分所產生之訊號必須經由一撓性電纜傳送，而於訊號處 理之前，該訊號於該撓性電纜處會受破壞。藉由將該自動 功率控制部分（APC) 120及運行光學功率控制部分 (ROPC)122移至雷射驅動器積體晶片（LDIC)U2之内，訊號 13 1345780 受破壞之情況明顯降低了。 ^境變動（諸如溫度變動）及雷射二極體丨3〇及132之 老化可能會影響雷射二極體130及132之特性（例如斜率效 率）°該自動功率控制部分（APC)12〇準確地控制雷射二極 體130及！ 32之輸出，以補償雷射二極體特性之變化。根 據本發明之一實施例，該自動功率控制部分（APC) 120包含 本身專有之偏移、增益、取樣保持及迴路補償電路（圖未 示出）。 該運行光學功率控制（R0PC)部分122監視由該光偵測 益積體晶片（PDIC)116所產生之訊號，以便特意地修改該 雷射—極體13〇及/或132之功率，以補償媒體中之變化/ 巧染（例如由指印及類似物所引起的）。換言之，如果傳送 至媒體之光線其反射回來與所期望係不同的話，該運行光 于力率控制（ROPC)部分122會調整該功率，以補償媒體中 之變化（而非保持功率不變）。根據本發明之一實施例，該 運打光學功率控制（R0PC)部分122可使用本身專有之偏移 、增益、取樣保持及迴路補償電路（圖未示出）來完成此 工作。 ^根據本發明之一實施例，一寫入策略產生器（亦即寫入 朿略產生胃124)係僅設置於拾訊頭124内，不需寫入策略 f生器亦設置於主要電路板1〇2《上。通常寫入策略產生 益係須要設置於主要電路板之上，因為取樣 係產生於主要電路板之上。如以上所討論，本發明之^ J已、' 里將取樣保持功能移往拾訊頭上，進而省去將寫入策 14 1345780 略產生器設置於主要電路板110上之需求 取樣保持電路及寫入策略產 於以上說明之實施例中 板移往光學拾訊單元 但亦可將取樣保持電路 器生器係設於主要電路 2所示。於該實施例中 生器電路兩者係皆由主要電路 (0PIO106。雖然這是較佳之配置， 移至拾訊頭之上，同時寫入策略產 板102上之控制器108之内，如圖 ，取樣保持時序訊號會經由撓性電纜由主要電路板上之寫 入策略產生器224被送至功率監視器積體晶片（pmic)1h 及光偵測器積體晶片（PDIC)116之取樣保持電路126及128 本發明貫施例可配合各種不同型式之資訊記錄/複製設 備使用。範例設備包含（但不限於）DVD驅動器、DVD攝錄影 機及DVD錄影機。本發明實施例亦可用於對於控制發光功 率非常重要之光纖應用或光藕合器應用。本發明實施例僅 為例示一些範例應用，不在於限制本發明。 以上說明内容係為本發明較佳實施例。這些實施例目 地在於例舉與說明，並不在於舉盡所有之實施例或限制本 發明於特定實施例。熟習本項技術人士將易於了解許多變 化及修改。選擇及說明之實施例係在於以最佳之方式說明 本發明之原理及其實際應用，藉以使熟習本項技術人士了 解本發明。本發明之範疇係由申請專利範圍及其同等物所 界定。 【圓式簡單說明】 (一）圖式部分 15 1345780 圖1係表示根據本發明一實施例之資訊記錄/複製設備 之部分。 圖2係表示根據本發明另一實施例之資訊記錄/複製設 備之部分。 (二）元件代表符號 102 主要電路板 104 撓性電纜 106 光學拾訊半元 108 控制器 110 類比前端 112 雷射驅動積體晶片 114 功率監視器積體晶片 116 光偵測器積體晶片 120 自動功率控制部分 122 運行光學功率控制部分 124 寫入策略產生器 126 取樣保持電路 128 取樣保持電路 130 雷射二極體體 132 雷射二極體體 ’ 134 光偵測器 136 光偵測器 224 寫入策略產生器 16Laser drivers are used to drive laser diodes in a variety of different types of information recording/reproducing devices such as DVD and CD drives, DVD camcorders, and MD video recorders. In general, a laser driver provides a current to a laser diode that causes the laser diode to output an optical signal. Before the optical signal is transmitted to a disc medium, the optical signal is appropriately focused by an optical system (for example, including a lens, a beam, and a beam splitter). The magnitude of the current provided by the laser driver (controlling the output power of the laser diode) may be based on whether the laser diode system is used to read or write data from the optical disc medium to the optical disc medium. change. In addition, the current 丄 M5780 : can also be based on the specific disc media, DVD or CD standard, and / or the speed of reading and writing data. . Changes in the % environment (such as temperature changes) and the aging of the laser diode can affect the characteristics of the laser diode (such as gate pinch current and slope efficiency), so there is a need to accurately control the laser diode The power is used to compensate for the change in the characteristics of the laser diode. In a conventional manner, a laser driver system is placed on an optical pickup device connected to a flexible cable. The main circuit board, the flexible power allows for analog communication between the main circuit board and the laser driver. In general, a chip system that performs automatic power control (APC) and operates optical power control (10) PC is provided. On the main circuit board. Therefore, a chip including automatic power control and running optical power control must generally transmit and receive a serial signal via a flexible cable to communicate with the laser diode and control the f-diode 1 such signals must be When the flexible gift is transmitted over a long distance in both directions, the signals typically pick up noise or are distorted before reaching their destination. This conventional system should be modified to overcome some of the above disadvantages and it is preferable to overcome all of the above disadvantages. SUMMARY OF THE INVENTION Embodiments of the present invention relate to laser drivers and other related circuits and functions. In accordance with an embodiment of the present invention, a laser driver integrated circuit (10) C) for driving one or more laser diodes includes an automatic (APC), an operational optical power controller (10) pc, and a write strategy: Production: Touch. The automatic power controller (Apc) controls an output of the laser diode to compensate for changes in the characteristics of the laser diode. The operational optics 1345780 power controller (R〇PC) controls the output of the laser diode to compensate for changes in the optical medium. The write strategy generator (ws generator) implements a suitable write strategy. The laser driver integrated circuit (LDIC) is disposed on an optical pickup 7L (0PU) which is in communication with the main circuit board via a flexible cable. According to an embodiment of the invention, the automatic power controller (APC) and the operational optical power controller "卯(7) each include its own dedicated offset, gain and sample-and-hold circuit to reduce transmission over the flexible cable. The number of analog signals between the optical pickup unit (0PU) and a main circuit board. The laser driver integrated circuit (UHC) can be part of a chip set, which is disposed in an optical pickup unit (〇Ρϋ) The optical pickup unit can be connected to the components on the main circuit board via a flexible cable. According to an embodiment of the invention, the chip set further comprises: a power monitor integrated circuit (PMIC) for Monitoring the laser diode; and a photodetector integrated circuit (PDIC) for detecting the light generated by the laser diode after the light has been reflected by the optical medium. According to the present invention In one embodiment, the power monitor integrated circuit (PM 1C) and the photodetector integrated circuit (pd ic) each include their own dedicated offset, gain, and sample and hold circuits. Schema and patent application BRIEF DESCRIPTION OF THE DRAWINGS [0009] FIG. 1 is a diagram showing a portion of an information recording/reproducing apparatus including a main circuit board 102 and a flexible device according to an embodiment of the present invention. The optical cable 104 and an optical pickup unit (OPU) 1-6. The main circuit board 102 includes a controller 108 and an analog front end (AFE) 110. The optical pickup unit (OPU) 106 1345780 includes a laser driver A integrated wafer (LDIC) 12, a power monitor integrated wafer (PMIC) 114, and a photodetector integrated wafer (PDIC) 116. The laser driver integrated wafer (LDIC) 112 is controlled to a laser II The currents of the polar bodies 130 and 132 cause one of the laser diode bodies 130 or 132 to output an optical signal. The optical signal is appropriately focused by an optical system (not shown) and transmitted to a disc medium ( Not shown. The magnitude of the current provided by the laser driver integrated chip (LDIC) 112 (controlling the output power of the laser diode 130 or 132) may be used depending on whether the laser diode system is used Disc media read or write The data is changed to the disc medium. In addition, the current can be determined by the specific disc medium, DVD or CD standard, and/or the speed at which data is read and written. Traditionally, power control is used in this Execution at the main board, which requires high-bandwidth monitoring and information signals to be transmitted from an optical pickup unit to the main board via a flexible power trace before the power control process can occur. When the signals are transmitted to the flexible circuit In the case of a cable, the signals may be damaged. According to an embodiment of the invention, the laser driver integrated chip (LDIC) 112 includes an automatic power control (APC) portion 120 and an operational optical power control (R〇pc) portion. The knife 122 is written to and/or written to the strategy generator 124. Therefore, it is not necessary to transmit a high bandwidth signal via the flexible cable 1〇4 before the power control process can occur. Further, as explained in detail below, the monitoring and information signals are generated and processed (at least for power control) on the optical pickup unit (0 PU) 106, so that the flexible cable i 〇 4 is eliminated. Requirements for Connectivity 雷 The Laser Driver Integrated Chip (LDIC) 112 shown in the figure can drive two different laser diodes 13 and 132. For example, one of the two poles 1345780 has a body output: a wavelength of about 78 〇 nm, which is used for CD technology, and another laser-pole system outputs a wavelength of about 655 nm, which is used for the discussion technique. The = Field Transducer Integrated Chip (LDIC) U2 can be used for CD and/or other D-type devices. Of course, if the laser driver integrated wafer (LDIC) is used in conjunction with only one of the types, a single laser diode can be used. Another example wavelength output output by laser diodes 130 and 132 is blue-violet light having a wavelength of about 4 〇 5 nm, which is used in Blu-ray technology. The laser driver integrated wafer (LDIC) 112 can also drive more than two laser diodes. For example, a laser driver integrated chip (ldic) ii2 can drive a first laser diode having an output wavelength of 780 nm, a second laser diode having an output wavelength of 655 nm, and a third field having an output wavelength of 4 to 5 nm. Shoot a polar body. Of course, the laser diodes can output optical signals of other wavelengths. The Hi-Write Policy Generator 124 implements an appropriate write strategy that can be based on media, DVD or CD standards, and/or speeds supported. Operation The Optical Power Controller (R〇PC) 122 uses (e.g., modulates) an Automatic Power Control (APC) signal to compensate for changes in the optical media. The automatic power control (Αρ〇) section 120 controls the laser diode to compensate for changes in the characteristics of the laser diode. These sections are discussed in more detail below. Before the optical signal output by the laser diode 130 or 132 reaches the optical medium, a photodetector 134 detects the signal and provides a signal representative of the detected intensity to the power monitor product. Body Wafer (PMIC) 114. In contrast, multiple photodetector 136 detects optical signals that have been reflected from optical media, such as DVD or CD media. The information signals generated by the optical debt detector 1345780 136 include user data (e.g., provided to the host in response to a host's read demand), servo data (e.g., for servo control), and amplitude information. The information signal amplitude sample generated by the photodetector integrated chip (PDIC) U6 is supplied to a running optical power controller (R〇PC) 122, which adjusts the power signal and current in the automatic power control (apc) portion. Signals to compensate for changes in the media, as discussed below. In contrast, the signal samples generated by photodetector 134 are used by automatic power control (APC) portion 120 to compensate for environmental variations and aging of laser diodes 130 and 132. Traditionally, the sample-and-hold and loop compensation circuits with power monitoring and light detection functions are provided on a main circuit board. Before the analog signal is amplified and sampled on the main circuit board, it needs to be transmitted via a flexible cable. The analog signal. In general, the flexible cable distort the analog signals prior to sampling. As shown in FIG. 1, a sinus power monitor integrated chip (pMIC) 丨丨 4 and a photodetector integrated chip (PDIC) 16 each contain their own proprietary biases according to an embodiment of the present invention. Shift, gain and sample hold (gain/SH) circuits 126 and 128. This enables the power monitor integrated chip (PMIC) 114 to amplify and sample the analog monitor signal generated by the photodetector 134. This also allows the photodetector integrated wafer (pDIC) 1 to be amplified and The analog information signal generated by the photodetector 丨36 is sampled. The fidelity of the optical pickup unit (丨〇pu)丨〇6 is increased by performing extremely fine and well-controlled sampling. In addition, since the signals (driven via the flexible cable 1 〇 4) are relatively slow after sampling (the slow δίΐ drive takes less power than driving a fast signal), the power consumption is reduced by 12 1345780. . A sample of the information signal generated by the photodetector integrated chip (PDIC) U6 is transmitted to the analog front end (AFE) via the flexible cable 104, and performs front-end signal processing, such as converting analog data into digital data. And control the focus and track the servo loop. As shown in Figure ,, the analog front end 110 provides a digital signal to the controller 108. The controller 1 8 can be in communication with a host computer and a servo controller (directly or via one or more interface circuits). A conventional controller disposed on a primary circuit board transmits a current control signal to a laser driver disposed on an optical pickup device. In accordance with an embodiment of the present invention, controller i08 transmits a power control nickname (rather than a current control signal) to laser driver integrated wafer 112 via flexible cable 104. This is possible, in part because the automatic power control (Apc) portion 120 and the operational optical power control (R〇pc) portion 122 are disposed within the laser driver integrated chip (LDIC) 12. When the laser driver integrated chip (LDIC) 112 receives the power control signal, the automatic power control portion and the operational optical power control portion allow the laser driver integrated chip (LDIC) 112 to determine the current required for itself. To drive the laser diode 130 or 132. Traditionally, the signal generated by the automatic power control portion and the operating optical power control portion must be transmitted via a flexible cable that is damaged at the flexible cable prior to signal processing. By moving the automatic power control portion (APC) 120 and the operational optical power control portion (ROPC) 122 into the laser driver integrated chip (LDIC) U2, the signal 13 1345780 is significantly degraded. The environmental changes (such as temperature variations) and the aging of the laser diodes 〇3 and 132 may affect the characteristics of the laser diodes 130 and 132 (e.g., slope efficiency). The automatic power control section (APC) 12〇 Accurately control the laser diode 130 and! The output of 32 to compensate for changes in the characteristics of the laser diode. In accordance with an embodiment of the present invention, the automatic power control portion (APC) 120 includes its own proprietary offset, gain, sample hold, and loop compensation circuits (not shown). The operational optical power control (R0PC) portion 122 monitors signals generated by the photodetection accumulator chip (PDIC) 116 to intentionally modify the power of the laser-poles 13 and/or 132 to compensate Changes in the media / coincidence (eg caused by fingerprints and the like). In other words, if the light transmitted to the medium is reflected back differently than desired, the operational light rate control (ROPC) portion 122 will adjust the power to compensate for changes in the medium (rather than maintaining power constant). In accordance with an embodiment of the present invention, the operational optical power control (ROPC) portion 122 can accomplish this by using its own proprietary offset, gain, sample hold, and loop compensation circuits (not shown). According to an embodiment of the present invention, a write strategy generator (ie, a write strategy 124) is provided only in the pickup 124, and the write strategy is not required to be set on the main board. 1〇2"上. The usual write strategy generation needs to be placed on top of the main board because the sampling is generated on top of the main board. As discussed above, the present invention moves the sample-and-hold function to the pick-up head, thereby eliminating the need for the write-and-hold circuit and write of the write controller 14 1345780 to the main board 110. The input strategy is produced in the embodiment described above, and the board is moved to the optical pickup unit, but the sample-and-hold circuit generator can also be disposed in the main circuit 2. In this embodiment, both of the generator circuits are composed of the main circuit (0PIO106. Although this is a preferred configuration, it is moved over the pickup head and simultaneously written into the controller 108 on the strategy board 102, as shown in the figure. The sample and hold timing signal is sent to the power monitor integrated chip (pmic) 1h and the photodetector integrated chip (PDIC) 116 by the write strategy generator 224 on the main circuit board via the flexible cable. Circuits 126 and 128 The present invention can be used with a variety of different types of information recording/copying devices. Example devices include, but are not limited to, DVD drives, DVD camcorders, and DVD recorders. The present invention is merely illustrative of some exemplary applications and is not intended to limit the present invention. The above description is based on the preferred embodiments of the present invention. The present invention is not to be construed as limited or limited by the details of the embodiments. The embodiments are described in order to best explain the principles of the invention and the application of the invention, and the invention will be understood by those skilled in the art. The scope of the invention is defined by the scope of the claims and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS (1) Drawing portion 15 1345780 Fig. 1 is a view showing a part of an information recording/reproducing apparatus according to an embodiment of the present invention. Fig. 2 is a view showing a part of an information recording/reproducing apparatus according to another embodiment of the present invention. (2) Component Representation Symbol 102 Main Circuit Board 104 Flexible Cable 106 Optical Pickup Half Element 108 Controller 110 Analog Front End 112 Laser Drive Integrated Chip 114 Power Monitor Integrated Chip 116 Photo Detector Integrated Chip 120 The automatic power control portion 122 operates the optical power control portion 124 to write the strategy generator 126 the sample hold circuit 128 the sample hold circuit 130 the laser diode body 132 the laser diode body 134 the light detector 136 the light detector 224 Write strategy generator 16