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六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種投影機，特別涉及一種投影機及其過熱 保護方法。 [先前技術】 [0002] 為了保證投影機之正常工作，儘量延長投影機壽命，投 影機散熱裝置已經成為一種必要裝置，並且已經被廣泛 應用，惟隨之而來之其他問題也在不斷產生，如在投影 機散熱過程中，因為投影機使用時過長，或者散熱效 果不好等’很容易造成投影機過熱，而損壞投影機。 [_在先前技術中，鄕機過熱時往往通過增加風扇轉速來 達到快速散熱之效果’當此方法無效後自動關機。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’給日常之工作帶來彼大不便。 【發明内容】 [_有砂此’有必要提供-種在投影_師減少關機頻 率之投影機及其過熱保護方法。 [0005] 096144501 -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，其用於感測投影機 内部之溫度。記憶體’其存儲有[溫度範圍之上限值 '下限值和第：溫度值，第—溫度賴之下限值大於第 二溫度值。處理單元，其用於判斷感測到之溫度值與第 -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，投影機進入省電模式，當感 測到之溫度值處於第二溫度值以下時’投影::入：常 表單编號Α0101 第4頁/共14頁 1003458263-0 1362559 [0006] [0007] [0008] [0009] [0010] [0011] [0012] 096144501 . 100年.12月09日修正替換頁 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，因為有多段缓衝設計，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說 明，舉以下實施方式並配合附圖進行詳細說明如下。 表單編號A0101 第5頁/共14頁 1003458263-0 1362559 1100年吻 〇9日 [0013] 請一併參閱圖1和圖2，為本發明提供之一種投影機，其 包括溫度感測器10、處理單元20、記憶體30、風扇40。 [0014] 溫度感測器1〇設置於投影機内部，感測投影機内部之溫 度’該感測到之溫度值為D。 [0015] 記憶體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有一下限值A1和上限值A2，其 上限值A2大於下限值A1，另外，第一溫度範圍之下限值 A1大於第三溫度值c，並且第三溫度值C又大於第二溫度 值B，也就係說，第一溫度範圍之上限值A2最大。 [0016] 處理單元20分別與溫度感測器1〇和記憶體3〇電連接，其 包括以下模塊：獲取模塊21〇，其用於獲取記憶體3〇存儲 之第一溫度範園A之下限值A1、上限值A2、第二溫度值b 、第二溫度值C以及溫度感測器1 〇感測到之溫度值d ;比 較模塊220，其用於比較溫度感測器10感測到之溫度值卩 與第一溫度範圍A之下限值A1、上限值A2、第二溫度值b 及第三溫度值C之間之關係；執行模塊23〇 ,其包括兩種 工作模式，分別係正常模式、省電模式。其申，投影機 具有-可以保證其正常工作之最低功帛，省電模式就係 在該最低功率下工作之一種模式，其在感測到之溫度值D 升高到第-溫度範®A内時開始啟動。正常模式係投影機 正常工作之-種模式，其在感測到之溫度值])降低到第二 溫度值B以下開始啟動。另外’當感測到之溫度值D大於 第-溫度範圍A之上限值A2時投影機就直接關機。根據比 較模塊220輸出之比較縣，然後輪入執行模塊23〇根據 此結果判斷並進入對應之工作模式或者關機。 096144501 表單编號A0101 第6頁/共14頁 1003458263-0 1362559 [0017] 風扇40，位於投影機内部，與處理單元20電連接，^ 機處於工作狀態時，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1作模式 〇 [0018] 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： [0019] 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。 [0020] 步驟S20 :感測投影機内之溫度值D。 [0021] 步驟S30 :獲取感測到之溫度值D。 [0022] 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2 2 0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： [0023] 步驟S41 :當D2C時’提高風扇4〇之轉速，來加快散熱 ，若仍無效，進入步驟S43。 [0024] 步驟S43 ·若溫度繼續升尚，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，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 \ 096144501 表單編號A0101 第7頁/共14頁 1003458263-0 [0025] [0026] [0027] [0028] [0029] [0030] [0031] 096144501 loo年ιέ月〇9日後正替換頁 溫度衝漸下降。 步驟S45 :當溫度下降到])$β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。 當感洌到之溫度值D小於第一溫度範圍Α之下限值Α1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2〇重新感測投影機内部之溫度，進入步 驟30、步驟4〇。 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 3〇、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’-般地，投影機可以進人正常使用 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’進人執行模塊23()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-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 ，直到度下降到第一溫度值以下為止。 表單编號A0101 第8頁/共14頁 1003458263-0 1362559 . · 100年.12月09日按正替換π [0032] 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 〇 [0033] 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。 【圖式簡單說明】 [0034] 圖1係本發明投影機之功能模塊圖。 [0035] 圖2係圖1中控制單元之功能模塊圖。 [0036] 圖3係本發明投影機過熱保護方法流程圖。 [0037] 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】 [0038] 溫度感測器：10 [0039] 處理單元：20 [0040] 記憶體：30 [0041] 風扇：40 [0042] 獲取模塊：210 [0043] 比較模塊：220 [0044] 執行模塊：230 096144501 表單編號Α0101 第9頁/共14頁 1003458263-06. Description of the Invention: [Technical Field] The present invention relates to a projector, and more particularly to a projector and an overheat protection method thereof. [Prior Art] [0002] In order to ensure the normal operation of the projector and extend the life of the projector as much as possible, the projector heat sink has become a necessary device and has been widely used, but other problems have arisen with it. For example, during the heat dissipation process of the projector, because the projector is used too long, or the heat dissipation effect is not good, etc., it is easy to cause the projector to overheat and damage the projector. [_In the prior art, when the machine is overheated, the effect of rapid heat dissipation is often achieved by increasing the fan speed.] When this method is invalid, it automatically shuts down. This makes it easy to turn off the projector when it overheats, which means that the shutdown frequency is 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 and its overheat protection method. [0005] 096144501 - A projector that 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 projector. The memory ' stores the [temperature range upper limit value] lower limit value and the first: temperature value, and the first temperature 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. When the sensed temperature value is within the first temperature range, the projector enters a power saving mode. When the sensed temperature value is below the second temperature value, 'Projection:: In: Normal Form Number Α 0101 Page 4 / Total 14 Pages 1003458263-0 1362559 [0006] [0007] [0008] [0009] [0010 [0012] [0012] 096144501. 100 years. December 09 revised replacement page mode, 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 reduction is reduced. The frequency at which shutdown occurs. [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 with reference to the accompanying drawings. Form No. A0101 Page 5 of 14 1003458263-0 1362559 1100 Kiss Kiss 9 [0013] Please refer to FIG. 1 and FIG. 2 together, which is a projector provided with a temperature sensor 10, Processing unit 20, memory 30, and fan 40. [0014] The temperature sensor 1 is disposed inside the projector and senses the temperature inside the projector'. The sensed temperature value is D. [0015] The memory 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 value A1 and an upper limit value A2, and the upper limit value A2 is greater than the lower limit value A1. In addition, the first temperature range lower limit value A1 is greater than the third temperature value c, and the third temperature value is C is again greater than the second temperature value B, that is, the upper limit A2 is the largest above the first temperature range. [0016] The processing unit 20 is electrically connected to the temperature sensor 1A and the memory 3〇, respectively, and includes the following module: an acquisition module 21〇, which is used to obtain the first temperature stored in the memory 3〇 The limit value A1, the upper limit value A2, the second temperature value b, the second temperature value C, and the temperature value d sensed by the temperature sensor 1 ;; the comparison module 220 is configured to compare the temperature sensor 10 for sensing The relationship between the temperature value 到 and 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; the execution module 23A includes two working modes, They are normal mode and power saving mode. The projector has a minimum function that can guarantee its normal operation, and the power saving mode is a mode of operation at the lowest power, and the sensed temperature value D rises to the first temperature range®A. Start inside. The normal mode is the mode in which the projector operates normally, and starts to start after the sensed temperature value]) is lowered below the second temperature value B. In addition, the projector is directly turned off when the sensed temperature value D is greater than the upper limit A2 of the first temperature range A. According to the comparison county outputted by the comparison module 220, the execution module 23 is then determined according to the result and enters the corresponding working mode or shuts down. 096144501 Form No. A0101 Page 6 of 14 1003458263-0 1362559 [0017] The fan 40, located inside the projector, is electrically connected to the processing unit 20, and when the machine is in operation, the speed of the fan 40 can be increased. When the temperature of the fan 40 is increased, the temperature of the fan is still rising, the projector enters the corresponding mode 〇 [0018] Please refer to FIG. 3 and FIG. 4 together for the projector overheat protection method, the steps are as follows: [0019 Step S10: Acquire a first temperature range A lower limit value A1, an upper limit value A2, a second temperature value B, and a third temperature value C. [0020] Step S20: sensing the temperature value D in the projector. [0021] Step S30: Acquire the sensed temperature value D. [0022] Step S40: the sensed temperature value d obtained in step S30 and the first temperature range A obtained in step S20, the lower limit value A1, the upper limit value A2, the second temperature value B, and the third temperature The value C is input to the comparison module 220, and the comparison module 220 generates the sensed temperature value D with 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, respectively. For comparison, the execution module 230 then causes the projector to enter the corresponding operational mode based on the comparison. Step S40 specifically includes the following steps: [0023] Step S41: When D2C, the speed of the fan 4 is increased to speed up the heat dissipation, and if it is still invalid, the process proceeds to step S43. [0024] Step S43: If the temperature continues to rise, when the sensed temperature value D is within the lower limit value A1 of the first temperature range A to the upper limit value A2, the projector enters the power saving mode because the projector is at Power saving mode In this working state, the power used is lower than the power during normal operation, so at this time the projector internal 096144501 Form No. A0101 Page 7 / 14 pages 1003458263-0 [0025] [0026] [0027 [0028] [0030] [0031] [0031] 096144501 loo years ιέ月〇 After 9 days, the replacement page temperature is gradually decreasing. Step S45: When the temperature drops to ])$β, the normal mode is entered, and the power is higher than the power saving mode, so the temperature gradually rises. When the sensed temperature value D is less than the first temperature range Α lower limit value Α1, as shown in Fig. 4, if the power saving mode is maintained at the same time, the power saving mode remains unchanged, and if it is in the normal mode, it remains normal. The mode is unchanged, and as shown in FIG. 3, return to step 2, re-sensing the temperature inside the projector, and proceed to step 30, step 4〇. 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. Measure the temperature inside the projector and proceed to step 3〇 and step 40. Steps S20 to S40 can be performed repeatedly and repeatedly, and the temperature can be adjusted through such a plurality of buffers. In general, the projector can be put into normal use. 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 enters the execution module 23(), the projector is directly turned off. The duration of the two modes of operation 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. Long until the degree drops below the first temperature value. Form No. A0101 Page 8 of 14 1003458263-0 1362559 . · 100 years. December 09 is replaced by positive π [0032] When the projector overheats and the fan speed is invalid, because there is a multi-stage buffer design, that is, the projector It can enter different working modes, so that the internal temperature of the projector can be adjusted, so the frequency of shutdown is reduced. [0033] In summary, the invention complies with the invention patent requirements, and patent application is filed 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. BRIEF DESCRIPTION OF THE DRAWINGS [0034] FIG. 1 is a functional block diagram of a projector of the present invention. 2 is a functional block diagram of the control unit of FIG. 1. 3 is a flow chart of a method for overheating a projector according to the present invention. 4 is a temperature-mode relationship diagram of a projector overheat protection method of the present invention. [Main component symbol description] [0038] Temperature sensor: 10 [0039] Processing unit: 20 [0040] Memory: 30 [0041] Fan: 40 [0042] Acquisition module: 210 [0043] Comparison module: 220 [ 0044] Execution module: 230 096144501 Form number Α 0101 Page 9 / Total 14 pages 1003458263-0