200923554 九、發明說明： 【發明所屬之技術領域】 種投影機及其過 本發明涉及一種投影機，特別涉及一 熱保護方法。 【先前技術】 為了保證投影機之正常工作，儘量延長投影機壽命，㈣機 散:裝置已經成為一種必要裝置’並且已經被廣泛應用，：隨之 而來之其他問題也在不斷產生，如在投影機散純程巾 投 影機使用時間過長，或者散熱效果不好等，後 ’’ 熱，而損壞投影機。 〜易造成投影機過 在先前技術中，投影機過熱時往往通過增加風扇轉速 來達到快速散熱之效果，當此方法無致後自 s動關機。這樣 就造成當投影機過熱時很容易就關機了， ^ ± 也就是說，關機 頻率比較高，給日常之工作帶來很大不便。 【發明内容】 有#於此’有必要提供-種在投影機過熱時減少關機 頻率之投影機及其過熱保護方法。 一種投影機’其内有兩種工作模式，即省電模式、正 常模式。該投影機包括·溫度感測器’其用於感二影機 内部之溫度。記憶體，其存儲有第一溫度範圍之上限值、 下限值和第二溫度值，第一溫度範圍之下限值大於第二溫 度值。處理單元，其用於判斷感測到之溫度值與第一溫度 範圍和第二溫度值之間之關係，當感測到之溫度值處於第 一溫度範圍内時’投影機進入劣電模式，當感測到之溫度 7 200923554 值處於第二溫度值以下時，投影機進入正常模式，當感測 到的溫度值處於第一溫度範圍之上限值以上時，投影機直 接關機。 一種投影機過熱保護方法，該投影機包括溫度感測 器、記憶體、處理單元。記憶體存儲有第一溫度範圍之上 限值、下限值和第二溫度值，第一溫度範圍之下限值大於 第二溫度值，所述投影機有兩種工作模式，即省電模式、 正常模式，所述投影機過熱保護方法包括以下步驟： 獲取記憶體中第一溫度範圍之上限值、第一溫度範圍 之下限值以及第二溫度值； 感測投影機内部之溫度值； 獲取所述感測到之溫度值； 判斷感測到之溫度值與第一溫度範圍和第二溫度值之 間之關係，使投影機進入相應之工作模式，當所述感測到 之溫度值處於所述第一溫度範圍内時，投影機進入省電模 式，當所述感測到之溫度值處於所述第二溫度值以下時， 投影機進入正常模式，當所述感測到之溫度值處於第一溫 度範圍之上限值以上時，投影機直接關機。 上述投影機及其過熱保護方法，當投影機過熱提高風 扇轉速無效後，因為有多段緩衝設計，即投影機可以進入 不同之工作模式，這樣就可以對投影機内部溫度進行調 節，所以減少了發生關機之頻率。 【實施方式】 為了對本發明之投影機及其過熱保護方法做進一步之 8 200923554 說明，舉以下實施方式並配合附圖進行詳細說明如下。 請一併參閱圖1和圖2,為本發明提供之一種投影機， 其包括服度感測器1〇、處理單元2〇、記憶體3〇、風扇4〇。 溫度感測器10設置於投影機内部，感測投影機内部之 溫度，該感測到之溫度值為D。 s己憶體30存儲有第一溫度範圍A、第二溫度值B以及 第三溫度值C。第一溫度範圍A有—下限值八工和上限值 A2’其上限值A2大於下限值A1，另外，第—溫度範圍之 :限值A1大於第三溫度值c，並且第三溫度值c又大於 第二温度值B’也就係說，第一溫度範圍之上限值A2最大。 處理單元20分別與溫度感測器1()200923554 IX. Description of the Invention: BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a projector, and more particularly to a thermal protection method. [Prior Art] In order to ensure the normal operation of the projector, extend the life of the projector as much as possible, (4) Machine dispersion: the device has become a necessary device' and has been widely used, and other problems that come with it are also constantly generated, such as The projector is used for a long time, or the heat dissipation effect is not good, and the ''heat' is damaged, and the projector is damaged. ~ Easy to cause the projector to pass In the prior art, when the projector overheated, it often increased the fan speed to achieve the effect of rapid heat dissipation. When this method is not used, it will be turned off automatically. This makes it easy to shut down when the projector overheats. ^ ± That is to say, the shutdown frequency is relatively high, which brings great inconvenience to daily work. SUMMARY OF THE INVENTION It is necessary to provide a projector that reduces the frequency of shutdown when the projector is overheated and its overheat protection method. A projector ' has two modes of operation, namely a power saving mode and a normal mode. The projector includes a temperature sensor 'for sensing the temperature inside the two cameras. The memory stores a first temperature range upper limit value, a lower limit value, and a second temperature value, and the first temperature range lower limit value is greater than the second temperature value. a processing unit, configured to determine a relationship between the sensed temperature value and the first temperature range and the second temperature value, and when the sensed temperature value is within the first temperature range, the projector enters the inferior mode, When the sensed temperature 7 200923554 is below the second temperature value, the projector enters the normal mode, and when the sensed temperature value is above the upper limit of the first temperature range, the projector directly shuts down. A projector overheat protection method includes a temperature sensor, a memory, and a processing unit. The memory stores a first temperature range upper limit value, a lower limit value, and a second temperature value. The first temperature range lower limit value is greater than the second temperature value, and the projector has two working modes, that is, the power saving mode. In the normal mode, the projector overheat protection method includes the following steps: acquiring a first temperature range upper limit value, a first temperature range lower limit value, and a second temperature value in the memory; sensing a temperature value inside the projector Obtaining the sensed temperature value; determining a relationship between the sensed temperature value and the first temperature range and the second temperature value, so that the projector enters a corresponding working mode, when the sensed temperature When the value is within the first temperature range, the projector enters a power saving mode, and when the sensed temperature value is below the second temperature value, the projector enters a normal mode when the sensing When the temperature value is above the upper limit of the first temperature range, the projector is directly turned off. The above projector and its overheat protection method, when the projector is overheated and the fan speed is invalid, because the multi-stage buffer design, that is, the projector can enter different working modes, the internal temperature of the projector can be adjusted, so the occurrence is reduced. The frequency of shutdown. [Embodiment] In order to further explain the projector of the present invention and its overheat protection method, the following embodiments will be described in detail below with reference to the accompanying drawings. Please refer to FIG. 1 and FIG. 2 together, which is a projector provided by the present invention, which includes a service sensor 1 , a processing unit 2 , a memory 3 , and a fan 4 . The temperature sensor 10 is disposed inside the projector and senses the temperature inside the projector, and the sensed temperature value is D. The suffix body 30 stores a first temperature range A, a second temperature value B, and a third temperature value C. The first temperature range A has a lower limit eighty and an upper limit A2' whose upper limit A2 is greater than the lower limit A1, and in addition, the first temperature range: the limit A1 is greater than the third temperature value c, and the third The temperature value c is again greater than the second temperature value B'. In other words, the upper limit A2 is the largest above the first temperature range. Processing unit 20 and temperature sensor 1 ()
接，其包括以下齡獲取模塊21Q，其用 30存儲之第一溫度範圍A之下限值A1、上限值A2、第二 溫度值B、第三溫度值C以及溫度感測器1〇感測到之溫； 值D，比較杈塊220，其用於比較溫度感測器1〇感測到之 溫度值D與第一溫度範圍A之下限值A1、上限值八]、第 二溫度值B及第三溫度值C之間之關係；執行模塊现， 其包括兩種工作模式，分別係正常模<、省電模式。其中， 投影機具有一可以保證其正常工作之最低功率，省電模 就係在該最低功率下：ϋ作之-種模式，其在感測到之溫^ 值D升高到第一溫度範圍Α内時開始啟動。正常模式^ = 影機正常工作之一種模式，其在感測到之溫度值〇^ =杈 第二溫度值B以下開始啟動。另外，當感测到之溫声 大於第-溫度範圍A之上限值A2時投影機就直接&機D 200923554 根據比較模塊220輸出之比較結果，然後輸入執行模塊 根據此結果判斷並進入對應之工作模式或者關機。 風扇40，位於投影機内部，與處理單元2〇電連接， 投影機處於工作狀悲時，可提高此風扇40之轉速，當提高 風扇40轉速後溫度仍升高時，投影機進入對應之工作模 式。 請一併參閱圖3和圖4，為本發明提供之一種投影機 過熱保護方法，步驟如下： 步驟S10 :獲取第一溫度範圍a之下限值A1、上限 值A2、第二溫度值B以及第三溫度值c。 步驟S20 :感測投影機内之溫度值d。 步驟S30 :獲取感測到之溫度值d。 步驟S40 :將步驟S30中獲取之感測到之溫度值d以 及步驟S20中獲取之第一溫度範圍a之下限值A1、上限 值A2、第二溫度值B、第三溫度值C輸入到比較模塊220， 比較模塊220將感測到之溫度值D分別與第一溫度範圍A 之下限值A1、上限值A2、第二溫度值B以及第三溫度值 C進行比較’然後，執行模塊230根據比較結果使投影機 進入對應工作模式。其中步驟S40具體包括以下步驟： 步驟S41 :當D2C時，提高風扇40之轉速，來加快 散熱，若仍無效，進入步驟S43。 步驟S43 :若溫度繼續升高，當感測到之溫度值D處 於第一溫度範圍A之下限值A1到上限值A2内時，投影機 進入省電模式，因為投影機在省電模式這種工作狀態下， 10 200923554 使用之功率係比正常工作時之功率低，所以此時投影機内 部溫度漸漸下降。 步驟S45 :當溫度下降到DSB時，進入正常模式， 此時功率比省電模式要高，所以溫度漸漸升高。 當感測到之溫度值D小於第一溫度範圍A之下限值 A1時，如圖4所示，若當時係省電模式則保持省電模式不 變，同樣，若當時係正常模式則保持正常模式不變，並且 如圖3所示返回到步驟20重新感測投影機内部之溫度，進 入步驟30、步驟40。 當感測到之溫度值D在第二溫度值B和第三溫度值C 之間時，如圖4所示，也同樣保持當前模式不變，並且如 圖3所示返回到步驟20重新感測投影機内部之溫度，進入 步驟30、步驟40。 其中，步驟S20〜S40可以反復複數次執行，經過這樣 多段緩衝對溫度之調整，一般地，投影機可以進入正常使 用狀態。 若複數次執行步驟S20〜S40後溫度仍繼續升高，則進 入步驟S47。 步驟S47 :當D>A2時，進入執行模塊230後投影機 直接關機。 上述步驟中兩種工作模式持續之時間係由溫度上升、 下降之具體情況而定，例如：當溫度升高到第一溫度範圍 内時，外界環境溫度也高，·則省電模式持續之時間就長， 直到溫度下降到第二溫度值以下為止。 11 200923554 . 當投影機過熱提高風扇轉速無效後，因為有多段緩衝 設計，即投影機可以進入不同之工作模式，這樣就可以對 投影機内部溫度進行調節，所以減少了發生關機之頻率。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技藝 之人士援依本發明之精神所作之等效修飾或變化，皆應涵 蓋於以下申請專利範圍内。 f 【圖式簡單說明】 圖1係本發明投影機之功能模塊圖。 圖2係圖1中控制單元之功能模塊圖。 圖3係本發明投影機過熱保護方法流程圖。 圖4係本發明投影機過熱保護方法之溫度-模式關係 圖。 【主要元件符號說明】 溫度感測器 10 處理單元 20 記憶體 30 風扇 40 獲取模塊 210 比較模塊 220 執行模塊 230 12Connected, it includes a following age acquisition module 21Q, which stores the first temperature range A, the lower limit value A1, the upper limit value A2, the second temperature value B, the third temperature value C, and the temperature sensor 1 sense The measured temperature; the value D, the comparison block 220, which is used to compare the temperature sensor D sensed by the temperature sensor 1 and the first temperature range A, the lower limit value A1, the upper limit value eight], the second The relationship between the temperature value B and the third temperature value C; the execution module now includes two working modes, namely a normal mode <, a power saving mode. Wherein, the projector has a minimum power that can ensure its normal operation, and the power saving mode is at the lowest power: the mode of the operation, the temperature value D rises to the first temperature range after sensing Start up when you are inside. Normal mode ^ = A mode in which the camera is operating normally, starting at the sensed temperature value 〇^ = 杈 second temperature value B. In addition, when the sensed temperature sound is greater than the upper limit value A2 of the first temperature range A, the projector directly & machine D 200923554 according to the comparison result output by the comparison module 220, and then the input execution module judges according to the result and enters the corresponding The working mode or shutdown. The fan 40 is located inside the projector and is electrically connected to the processing unit 2〇. When the projector is in a working condition, the speed of the fan 40 can be increased. When the temperature of the fan 40 is increased, the temperature of the fan 40 is increased, and the projector enters the corresponding work. mode. Please refer to FIG. 3 and FIG. 4 together, which is a projector overheat protection method provided by the present invention. The steps are as follows: Step S10: Obtain a first temperature range a lower limit value A1, an upper limit value A2, and a second temperature value B And a third temperature value c. Step S20: Sensing the temperature value d in the projector. Step S30: Acquire the sensed temperature value d. Step S40: input the sensed temperature value d obtained in step S30 and the first temperature range a, the lower limit value A1, the upper limit value A2, the second temperature value B, and the third temperature value C obtained in step S20. To the comparison module 220, the comparison module 220 compares the sensed temperature value D with the first temperature range A lower limit value A1, the upper limit value A2, the second temperature value B, and the third temperature value C, respectively. The execution module 230 causes the projector to enter a corresponding working mode according to the comparison result. Step S40 specifically includes the following steps: Step S41: When D2C, the rotation speed of the fan 40 is increased to speed up the heat dissipation, and if it is still invalid, the process proceeds to step S43. Step S43: If the temperature continues to rise, when the sensed temperature value D is within the first temperature range A below the upper limit value A1 to the upper limit value A2, the projector enters the power saving mode because the projector is in the power saving mode. Under this working condition, the power used by 10 200923554 is lower than that during normal operation, so the internal temperature of the projector gradually drops. Step S45: When the temperature drops to the DSB, the normal mode is entered, and the power is higher than the power saving mode, so the temperature gradually increases. When the sensed temperature value D is less than the lower limit value A1 of the first temperature range A, as shown in FIG. 4, if the power saving mode is in the current state, the power saving mode is maintained, and if the normal mode is maintained at the time, The normal mode is unchanged, and returns to step 20 as shown in FIG. 3 to re-sensing the temperature inside the projector, and proceeds to step 30 and step 40. When the sensed temperature value D is between the second temperature value B and the third temperature value C, as shown in FIG. 4, the current mode is also kept unchanged, and returns to step 20 as shown in FIG. The temperature inside the projector is measured, and the process proceeds to step 30 and step 40. The steps S20 to S40 can be performed repeatedly and repeatedly. After the multi-stage buffer adjusts the temperature, generally, the projector can enter the normal use state. If the temperature continues to rise after performing steps S20 to S40 in plural, the process proceeds to step S47. Step S47: When D>A2, the projector is directly turned off after entering the execution module 230. The duration of the two operating modes in the above steps depends on the specific conditions of temperature rise and fall. For example, when the temperature rises to the first temperature range, the ambient temperature is also high, and the power saving mode continues. It is long until the temperature drops below the second temperature value. 11 200923554 . When the projector overheats and the fan speed is invalid, because the multi-stage buffer design, that is, the projector can enter different working modes, the internal temperature of the projector can be adjusted, thus reducing the frequency of shutdown. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. f [Simple description of the drawings] Fig. 1 is a functional block diagram of the projector of the present invention. Figure 2 is a functional block diagram of the control unit of Figure 1. 3 is a flow chart of a method for overheating the projector of the present invention. Fig. 4 is a temperature-mode relationship diagram of the projector overheat protection method of the present invention. [Description of main component symbols] Temperature sensor 10 Processing unit 20 Memory 30 Fan 40 Acquisition module 210 Comparison module 220 Execution module 230 12