1309349 九、發明說明： ,【發明所屬之技術領域】 本發明係關於一種具有省電模式之傳送單元、電腦系 統及晝面資料顯示方法，特別關於在省電模式下，可降低 耗電量之傳送單元、電腦系統及畫面資料顯示方法。 【先前技術】 當今電腦系統都具備電源，且當電腦系統配置週邊設 ^ 備後，電腦系統之耗電量亦隨之增加，因此如何降低電腦 系統之耗電量，乃為電腦系統之重要考量。 一般而言，電腦系統為求省電，均具有省電模式。在 作業系統(os)得知電腦系統處於閒置狀態，並且閒置時間 達到一預設值時，會要求電源管理器（Power Management Unit，PMU)控制電腦系統進入省電模式，以達省電之功 效。當進入省電模式後，電腦系統之部分元件的電源會被 φ 切斷，以節省耗電量，但是顯示單元（例如螢幕）仍會顯示 -晝面（例如螢幕保護晝面），此時繪圖引擎必須持續傳送晝 ~面（refresh)至顯示單元以顯示晝面，因此繪圖引擎的電源 並未被切斷，所以仍會消耗電源。 【發明内容】 本發明提供一種可降低耗電量之傳送單元、電腦系統 及晝面資料顯示方法。 本發明之傳送單元係連結於一顯示單元，用以傳送該 6 1309349 顯示單元所顯示之晝面資料，其中傳送單元包含一螢幕捕 ，捉模組、一記憶模組及一螢幕控制模組。螢幕捕捉模組連 接至顯示單元，用以當一電腦系統進入省電模式時擷取顯 示單元正在顯示之晝面資料；記憶模組用以儲存螢幕捕捉 模組擷取之晝面資料；以及螢幕控制模組用以當電腦系統 位於省電模式時，將記憶模組所儲存的畫面資料持續傳送 到顯示單元。 本發明之電腦系統包含一繪圖引擎，用以進行圖形之 ® 運算並產生影像訊號作為顯示之晝面資料；一傳送單元， 連結至繪圖引擎，用以接收晝面資料；以及一顯示單元， 連接至傳送單元，用以顯示傳送單元所傳送的晝面資料。 其中，當電腦系統進入省電模式時，傳送單元擷取顯示單 元正在顯示之晝面資料，在省電模式的期間顯示單元持續 顯示擷取的畫面資料。 另外，本發明之晝面資料顯示方法，適用於一電腦系 Φ 統中，電腦系統包含一顯示單元用以顯示晝面資料，晝面 '資料顯示方法包含有：當電腦系統進入省電模式時擷取顯 -示單元正在顯示的晝面資料；以及當電腦系統於省電模式 期間，持續顯示所擷取之晝面資料。 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之電 腦系統。 圖1為一電腦系統100之示意圖。電腦系統100包含 7 1309349 一中央處理器1G、-北橋單元2G、—系統記憶體3〇與一 、顯不單元40。其中顯示單元40例如為一液晶(lc曜幕或 .一陰極管（CRT)螢幕。 如圖2所示為本發明北橋單元2〇之示意圖。在本發 =一較佳實關中，北橋單元2G包含有—、㈣引擎22及 一傳送單元24,並與顯示單元40電連接。繪圖引擎22用 以進行圖形運算與產生影像訊號，並透過傳送單元24將 鲁影像訊號送至顯示單元4〇,以驅動顯示單元4〇顯示影像。 圖3為本發明-較佳實施例之傳送單元24示意圖，其包 含一螢幕捕捉模組241、一記憶模組242、一螢幕控制掇 組243與一記憶控制模組244。此外，本發明之傳^單元 24更包含有一接收介面245以及一傳迸介面246。 在本發明中，螢幕捕捉模組241會在電腦系統進 入一省電模式時，擷取顯示單元4〇所顯示之晝面資料， 並將所摘取之晝面資料儲存於記憶模纟且242中。另外，當 _電腦系、统100進入省電模式後，螢幕控制模组243持續將 &己憶模組242所儲存之晝面資料經由傳送介面模組246傳 ‘送至顯示單元40。 本實施例之接收介面245與傳送介面246分別可為一 數位視訊介面(Digital Visual Interface，DVI)，一高清晰度 數位多媒體介面（High Definition Multimedia Interface, HDMI)，一低電壓差動訊號(l〇w Voltage Differential Signaling, LVDS)介面或一最小化傳輸差分訊號(Transition Minimized Differential Signaling，TMDS)介面，其係可以 1309349 依據不同使用需求設計之。 、 如上述，本實施例之電腦系統100之晝面資料顯示方 法如下：當電腦系統100處於正常工作模式（意即未進入省 電模式）時，接收介面245接收來自繪圖引擎22之顯示資 料，並且透過傳送介面246將顯示資料傳送至顯示單元 40，以供顯示單元40顯示。反之，當電腦系統100閒置 一預定時間後，則進入省電模式。而當電腦系統100於一 第一時間I(如圖4所示）進入省電模式時，螢幕捕捉模組 • 241擷取於第一時間乃時，顯示單元40所顯示之晝面資 料，並將所擷取之晝面資料儲存於記憶模組242，並且在 電腦系統100進入省電模式的期間，螢幕控制模組243持 續透過記憶控制模組244將記憶模組242所儲存之晝面資 料經由傳送介面246傳送至顯示單元40,以便顯示單元 40在省電模式下持續顯示所擷取之晝面資料。 請參閱圖4所示，為本實施例之電腦系統100作動時 φ 序圖。為了使本發明更容易被理解，以圖4所示之時序圖 '說明電腦系統100之作動狀態。圖4中之曲線91用以表 ^示電腦系統100之運作狀態，當曲線91為高位準時，表 示電腦系統100進入省電模式，而曲線91為低位準時， 表示電腦系統100為正常工作模式。曲線92用以表示螢 幕捕捉模組241之致能信號，當曲線91由低位準轉為高 位準時，曲線92產生一脈衝，此時螢幕捕捉模組241被 致能以擷取目前顯示單元40所顯示之晝面資料。當曲線 93為低位準時，表示顯示單元40顯示電腦系統100為正 9 1309349 常輸出的影像訊號，而當曲線93為高位準時，表示顯示 、單元40顯示螢幕捕捉模組241所擷取之晝面資料，另外， A〜Η表示複數個顯示資料。 由圖4中可知，當電腦系統100未進入省電模式時， 傳送單元24所接收顯示資料依序為A、B、C、D，且將顯 示資料A、B、C、D送至顯示單元40。而當電腦系統1〇〇 在第一時間進入省電模式時，此時螢幕捕捉模組241 致能並擷取目前顯示單元40所顯示之顯示資料E作為晝 • 面資料，並且將顯示資料E儲存於記憶模組242内。在省 電模式下，傳送單元24持續送出顯示資料E至顯示單元 40，以便顯示單元40持續顯示此顯示資料E。 如上述可知，本實施例之電腦系統100在省電模式 下，所提供之晝面資料不需要經由繪圖引擎22產生，只 需由傳送單元24提供即可，因此包括繪圖引擎22在内的 其他電腦元件等皆可以切斷電源，以達到更進一步降低電 鲁 腦系統100之耗電量。 ' 承上所述，因依本發明之電腦系統在進入省電模式 -時，會藉由螢幕捕捉模組或螢幕捕捉器擷取當時的晝面資 料，並將所擷取之晝面資料儲存於記憶模組或記憶體中， 而且在電腦系統進入省電模式的期間，傳送單元或傳送模 組持續將所儲存之晝面資料傳送至顯示單元，以便顯示單 元持續顯示晝面資料。與習知技術相比較，本發明之電腦 系統在省電模式下，所提供之畫面資料不需要經由繪圖引 擎產生，只需由傳送單元提供即可，因此包括繪圖引擎在 1309349 2的其他電社件’如··主控龍組、記,_控制模組、 、中央處理單元、祕記憶體、南橋單元及周邊元件（圖中未 ，^)...等，可以關閉電源，進而有效地降低電腦系统之耗 上述提到本發明一實施例之電腦系統其中繪圖引擎 =送單㈣合於北橋單元中，如此可以減少1309349 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a transmission unit having a power saving mode, a computer system, and a method for displaying a facet data, in particular, in a power saving mode, the power consumption can be reduced. Transfer unit, computer system and screen data display method. [Prior Art] Today's computer systems have power supplies, and when the computer system is configured with peripheral devices, the power consumption of the computer system also increases. Therefore, how to reduce the power consumption of the computer system is an important consideration for the computer system. In general, computer systems have a power-saving mode in order to save power. When the operating system (os) knows that the computer system is idle and the idle time reaches a preset value, the power management unit (PMU) is required to control the computer system to enter the power saving mode to achieve the power saving effect. . When entering the power saving mode, the power of some components of the computer system will be cut off by φ to save power consumption, but the display unit (such as the screen) will still display the - surface (such as the screen protection surface), then draw The engine must continue to deliver the refresh to the display unit to display the surface, so the power to the graphics engine is not cut off, so power is still consumed. SUMMARY OF THE INVENTION The present invention provides a transmission unit, a computer system, and a face data display method capable of reducing power consumption. The transmission unit of the present invention is coupled to a display unit for transmitting the information displayed on the display unit of the 6 1309349. The transmission unit includes a screen capture module, a memory module and a screen control module. The screen capture module is connected to the display unit for capturing the data displayed by the display unit when the computer system enters the power saving mode; the memory module is configured to store the face data captured by the screen capture module; and the screen The control module is configured to continuously transmit the screen data stored by the memory module to the display unit when the computer system is in the power saving mode. The computer system of the present invention comprises a drawing engine for performing the operation of the graphic and generating the image signal as the displayed face data; a transfer unit connected to the drawing engine for receiving the face data; and a display unit, the connection To the transfer unit for displaying the face data transmitted by the transfer unit. Wherein, when the computer system enters the power saving mode, the transmitting unit captures the face data that the display unit is displaying, and the display unit continuously displays the captured picture data during the power saving mode. In addition, the method for displaying the face data of the present invention is applicable to a computer system, wherein the computer system includes a display unit for displaying the face data, and the method of displaying the data includes: when the computer system enters the power saving mode. The data displayed by the display unit is displayed; and the captured data is continuously displayed while the computer system is in the power saving mode. [Embodiment] A computer system according to a preferred embodiment of the present invention will be described below with reference to the related drawings. 1 is a schematic diagram of a computer system 100. The computer system 100 includes a central processing unit 1G, a north bridge unit 2G, a system memory unit 3, and a display unit 40. The display unit 40 is, for example, a liquid crystal (lc screen or a cathode tube (CRT) screen. As shown in FIG. 2 is a schematic diagram of the north bridge unit 2 of the present invention. In the present invention, the north bridge unit 2G The engine 22 and the transmission unit 24 are electrically connected to the display unit 40. The graphics engine 22 is configured to perform graphics operations and generate video signals, and send the Lu video signals to the display unit 4 through the transmitting unit 24. The display unit 4 is driven to display an image. FIG. 3 is a schematic diagram of a transmission unit 24 according to the preferred embodiment of the present invention, which includes a screen capture module 241, a memory module 242, a screen control unit 243 and a memory control. The module 244 further includes a receiving interface 245 and a transmission interface 246. In the present invention, the screen capture module 241 captures the display when the computer system enters a power saving mode. The unit 4 displays the displayed face data, and stores the extracted face data in the memory module 242. In addition, when the computer system 100 enters the power saving mode, the screen control module 243 continues to & recall module The 512 stored data is sent to the display unit 40 via the interface module 246. The receiving interface 245 and the transmission interface 246 of the embodiment can be a digital visual interface (DVI), respectively. High Definition Multimedia Interface (HDMI), a low voltage differential signal (LVDS) interface or a Transition Minimized Differential Signaling (TMDS) interface. 1309349 is designed according to different usage requirements. As described above, the method for displaying the data of the computer system 100 of the embodiment is as follows: when the computer system 100 is in the normal working mode (ie, does not enter the power saving mode), the receiving interface 245 receives The display data from the drawing engine 22 is transmitted to the display unit 40 through the transfer interface 246 for display by the display unit 40. Conversely, when the computer system 100 is idle for a predetermined period of time, it enters the power saving mode. When the system 100 enters the power saving mode at a first time I (as shown in FIG. 4), The screen capture module • 241 captures the face data displayed by the display unit 40 at the first time, and stores the captured face data in the memory module 242, and enters the power saving mode in the computer system 100. The screen control module 243 continuously transmits the data stored in the memory module 242 to the display unit 40 via the transmission interface 246 through the memory control module 244, so that the display unit 40 continuously displays the captured data in the power saving mode. After the information. Please refer to FIG. 4, which is a φ sequence diagram when the computer system 100 of the embodiment is activated. In order to make the present invention easier to understand, the operation state of the computer system 100 will be described with the timing chart shown in FIG. The curve 91 in FIG. 4 is used to indicate the operating state of the computer system 100. When the curve 91 is at a high level, the computer system 100 is in the power saving mode, and the curve 91 is in the low level, indicating that the computer system 100 is in the normal working mode. The curve 92 is used to indicate the enable signal of the screen capture module 241. When the curve 91 is changed from the low level to the high level, the curve 92 generates a pulse. At this time, the screen capture module 241 is enabled to capture the current display unit 40. Display the face data. When the curve 93 is at a low level, the display unit 40 displays the image signal that the computer system 100 is normally 9 1309349, and when the curve 93 is at the high level, the display unit 40 displays the screen captured by the screen capture module 241. In addition, A~Η indicates a plurality of display materials. As can be seen from FIG. 4, when the computer system 100 does not enter the power saving mode, the display data received by the transmitting unit 24 is sequentially A, B, C, and D, and the display materials A, B, C, and D are sent to the display unit. 40. When the computer system 1 enters the power saving mode at the first time, the screen capture module 241 enables and captures the display data E displayed by the current display unit 40 as the surface data, and displays the data E. Stored in the memory module 242. In the power saving mode, the transmitting unit 24 continuously sends the display material E to the display unit 40 so that the display unit 40 continuously displays the display material E. As can be seen from the above, in the power saving mode of the computer system 100 of the embodiment, the provided face data does not need to be generated by the drawing engine 22, and only needs to be provided by the transmitting unit 24, and thus includes the drawing engine 22 and the like. The computer components and the like can cut off the power supply to further reduce the power consumption of the electric brain system 100. According to the above, when the computer system according to the present invention enters the power saving mode, the screen capture module or the screen capture device is used to capture the current face data, and the captured face data is stored. In the memory module or the memory, and during the time when the computer system enters the power saving mode, the transmitting unit or the transmitting module continuously transmits the stored face data to the display unit, so that the display unit continuously displays the face data. Compared with the prior art, the computer system of the present invention does not need to be generated by the drawing engine in the power saving mode, and only needs to be provided by the transmitting unit, and thus includes other drawing companies of the drawing engine at 1309349 2 The pieces 'such as the main control dragon group, remember, _ control module, central processing unit, secret memory, south bridge unit and peripheral components (not shown in the figure, ^), etc., can turn off the power, and thus effectively Reducing the consumption of the computer system. The above mentioned computer system according to an embodiment of the present invention, wherein the drawing engine = the delivery order (four) is integrated into the north bridge unit, so that the reduction can be reduced.
元之外;此外傳送單於北橋單 哥早70亦可獨立於北橋單元之外。因此以 所述僅為舉例性，而非為限制性者。任何来脫離本發明 之精神與料’㈣其進行之等效修改或變更，均應包含 於後附之申請專利範圍中。 【圖式簡單說明】 圖1為本發明〜實施例之電腦系統之示意圖； 圖2為本發明一實施例之北橋單元斧意圖； φ 圖3為本發明〜實施例之傳送單元之斧意圖，以及 圖4為本發明之電腦系統之作動時序圖。 元件符號說明： 100-電腦系統 10-中央處理單元 20-北橋單元 30-系統記憶體 40-顯示單元 11 1309349 22-繪圖引擎 24-傳送單元 241- 螢幕捕捉模組 242- 記憶模組 243- 螢幕控制模組 244- 記憶控制模組 245- 接收介面 246- 傳送介面 _ —第一時間 91〜93-曲線 A〜H-資料In addition to the yuan; in addition to the transmission of the North Bridge, the brother of the early 70 can also be independent of the North Bridge unit. It is therefore intended to be illustrative, and not restrictive. Any equivalent modifications or alterations made by the spirit of the invention may be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a computer system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a north axle unit axe according to an embodiment of the present invention; FIG. 3 is an axe intention of a transmission unit according to the embodiment of the present invention. And FIG. 4 is a timing chart of the operation of the computer system of the present invention. Component symbol description: 100-computer system 10 - central processing unit 20 - north bridge unit 30 - system memory 40 - display unit 11 1309349 22 - graphics engine 24 - transmission unit 241 - screen capture module 242 - memory module 243 - screen Control Module 244 - Memory Control Module 245 - Receive Interface 246 - Transfer Interface _ - First Time 91~93 - Curve A~H- Data