200841292 九、發明說明： 【發明所屬之技術領域】 • 本發明係關於一種顯示裝置。 【先前技術】 通常，顯示裝置係需要使用者利 之開關狀態進行手動控制。然，卷使用本开1 電源 時，叙常来田使用者有緊急事務離開 不必要之電能浪費。 ％原進仃關閉，由此造成200841292 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention relates to a display device. [Prior Art] Generally, the display device requires manual control of the user's switching state. However, when the volume uses the power of the first power supply, the users of the regular field have an urgent need to leave unnecessary power waste. % original 仃 closed, resulting in
為解決上述問題，目前業界提供—種利則貞測 測使用者是否離開，進而根據使用者之狀 狀態進行控制之顯示裝置。 ’、 哥 請參閱圖1，係-種先前技術利用偵測裝置實現節 =供電之顯示裝置之結構方框圖。該顯示裝置⑽包括依次 :“ ί -二一路110、一控制電路120' 一電源電路i40 及一顯不核組13〇。其中，該控制電路12〇用 電 電路140對該顯示模組13〇之供電。 制該包源 該偵測電路110包括-紅外線镇測器。由於人體本身合 放射出-定波長之紅外線，若該紅外線仙⑸貞測到來^ 該顯不裝置100前方之人體發出之紅外線，即該顯示裝置 100之使用者在位時，其便向該控制電路12〇發出一控制訊 號乂： ’該控制電路120在該控制訊號V1作用下，控ς該電 源電路140對該顯示模組13G進行供電，使該顯示裝置謂 處於正常工作狀態。若該紅外線偵卿未能偵測到來自該 顯示裝置100前方之人體發出之紅外線，即該顯示裝置⑺^ 7 200841292 之使用者離位時，其便向該控制電路120發出另一控制訊號 V2,該控制電路12〇在該控制訊號％作用下，關閉該電源 1路140對該顯示模組13〇之供電，使該顯示裝置1〇〇進入關 閉狀態。由此該顯示裝置100實現當使用者離開時自動關閉 電源供電’避免造成不必要之電能浪費。 然，由於通常該顯示裝置100周圍環境之其他物體，如 曰光燈、書本等也會發出一定波長之紅外線而導致該偵測 電路110產生干擾訊號，該干擾訊號進入該控制電路12〇 後，容易導致當使用者離開時該顯示裝置100未能很好地實 現電源供電之自動關閉，使得該顯示裝置iQQ自動關機之可 靠性較低，因此該顯示裝置100仍會帶來不必要之電能浪 費。 【發明内容】 有鑑於此’有必要提供一種消除干擾訊號，提高自動 關機可靠性之顯示裝置。 一種顯示裝置，其包括一顯示模組、一電源電路、一 用於偵測該顯示裝置使用者之狀態之摘測電路、一用於濾 除該偵測電路產生之干擾訊號之抗干擾電路及一控制該電 源電路對該顯示模組供電之控制電路，該偵測電路、該抗 干擾電路、該控制電路、該電源電路及該顯示模組依次連 接’該偵測電路及該抗干擾電路偵測該顯示裝置使用者之 狀態並根據其狀態向該控制電路輸出一控制訊號，該控制 電路根據該控制訊號，控制該電源電路對該顯示模組之供 電。 8 200841292 相較於先前技術，本發明 該控制電路之間增加了一抗干=:衣：於該该測電路與 •面遽除該顯示裝置之侦測電：^:該抗干擾電路-方 方二方面濾除由於人體於該顯示裝置前 :裝置自動關機之可靠性，使得該顯示裝置::吏= 日寸該顯不裝置能準確地控制其 幵1 〇供电:現电源供電之自動關閉，節省電能。且，本發 之^衣置糟由該偵測電路及該抗干擾電路仙其使用 者之狀怨’進而根據使用去夕此自t _^丄 ㈣…㈣ 猎由該控制電路控制該 路㈣顯不额之供電，由此實現#使 :時該顯示裝置自動開機，而當使用者離開座位時該顯； 、置自動關機’使得該顯示裝置使用起來簡單方便。 【實施方式】 請參閱圖2,係本發明顯示裳置一較佳實施方式所揭示 之電路結構圖。該顯示裝置細包括一偵測電路21〇、 干擾私路250、一控制電路22〇、一電源電路24〇及一顯示模 組230。其中，該谓測電路21〇、該抗干擾電路25〇、該控制 電路220、該f源電路24〇及該顯示模組23〇依次連接，餘 制電路220用於控制該電源電路24〇對該顯示模組之 電。 八 該偵測電路210包括一紅外線偵測器211、一第一電阻 212及一第一電容213及一第二電容214。該紅外線偵測器 211可以為一量子型紅外線偵測器或一焦熱型紅外線偵測 200841292 器’其包括一紅外線接收端218、一電源端215、一接地端 216及一訊號輸出端217。該紅外線接收端218用於接收該紅 外線偵測器211周圍之紅外線，該電源端215藉由該第一電 阻212連接至直流電源Vcc，並藉由該相互並聯之第一電容 213及弟一電谷214接地，該接地端216直接接地。當該紅外 線偵測器211偵測到該顯示裝置200前方一定範圍内存在一 疋強度之紅外線k ’其將該紅外線轉換成一對應之電壓訊 號VIR並藉由該訊號輸出端217輪出至該抗干擾電路250。 該抗干擾電路250包括一由一高通濾波電路（High pass Filter Circuit)260 及一低通濾波電路（l〇w pass Filter Circuit)27。連接而成之帶通濾波電路（Band pass Filter Circuit)(未標示）、一比較電路280及一積分電路290。該帶 通濾波電路、該比較電路280及該積分電路29〇依次連接於 該"[貞測電路210及該控制電路22〇之間。 該焉通濾、波電路260包括一第一集成運算放大器 (Integrated Operational Amplifier，i〇a)261、一第三電容 262、一第二電阻263、一第三電阻264及一第四電阻265。 該弟一集成運异放大器261採用負反饋（Negative Feedback) 方式連接以降低其輸出電阻，其反相輸入端藉由該第三電 阻264連接至其輸出端，其同相輪入端藉由相互串聯之該第 四電阻265及該第二電容262連接至該紅外線偵測器211之 訊號輸出端217，同時藉由該第二電阻263接地。當由該偵 測電路210發出之電壓訊號vIR輪出到該高通濾波電路260 時’由於低頻狀態下電容之容抗很大，而高頻狀態下電容 200841292 之容抗很小，因此該訊號之低頻部份將被該第三電容262 )艮好地衰減，而其高頻部份基本上不受該第三電容262之影 響。該咼通滤、波電路260便滤·除該電壓訊號Vir之低頻訊 號，其低頻截止頻率虼可由fi^l/(27rRC)得到，其中R係該 第四電阻265與該第二電阻263相互串聯所得到之電阻值， C係該第三電容262之電容值。藉由選擇大小合適之該第二 電阻263、該第四電阻265及該第三電容262，便可控制該低 頻截止頻率fL之大小。該高通濾波電路260便可實現濾除該 •電壓訊號VIR中頻率低於fL之訊號而讓頻率高於fL之訊號作 為輸出訊號Vhp順利通過。 該低通濾波電路270包括一第二集成運算放大器271、 一第五電阻272、一第四電容273及一第六電阻274。該第二 集成運算放大器271亦採用負反饋方式連接以降低其輸出 電阻，其反相輸入端藉由該第六電阻274連接至其輸出端， 其同相輸入端藉由該第五電阻272連接至該第一集成運算 放大器261之輸出端，同時藉由該第四電容273接地。由於 春該第四電容273連接於接地端與該第二集成運算放大器271 之同相輸入端之間，因此當由該高通濾波電路260輸出之電 壓訊號VHP輸出至該低通濾波電路270時，其中頻率較高之 部份將由於經該第四電容273流向接地端而迅速衰減，而頻 率較低之部份基本不受該第四電容273之影響。該低通濾波 電路270之高頻截止頻率fH亦可由fH = l/(2;rRC)得到，其中 R係該第五電阻272之電阻值，C係該第四電容273之電容 值。藉由選擇合適之該第五電阻272及該第四電容273使該 11 200841292 高頻截止頻率fH大於該低頻截止頻率fL，該低通濾波電路 ’270便實現-遽除該電壓訊號Vfjp中頻率南於fη之訊號而讓頻 •率低於fH之訊號作為輸出訊號VBP順利通過。因此，由該偵 測電路210發出之電壓訊號Vir經過該帶通遽波電路時’其 中頻率大於該低頻截止頻率fL而小於該高頻截止頻率fH之 訊號幾乎能全部通過，而頻率大於該高頻截止頻率fH及小 於該低頻截止頻率fL之訊號便被大量衰減。藉由調整該第 二電阻263、該第四電阻265、該第五電阻272、該第三電容 _ 262及該第四電容273之大小，便可控制該帶通濾波電路之 頻帶寬度。 該比較電路280包括一電壓比較器281、一第七電阻282 及一第八電阻283。該電壓比較器281之同相輸入端連接至 該第二集成運算放大器271之輸出端，其反相輸入端藉由該 第七電阻282連接至該直流電源Vcc，同時藉由該第八電阻 283接地，其輸出端連接至該積分電路290。該第七電阻282 及該第八電阻283對該直流電源Vcc進行分壓從而確定一基 ⑩準電壓Vrei，該電壓比較器281對其同相輸入端接收到之電 壓訊號vBP與其反相輸入端接收到之該基準電壓vref進行 比較，得到一開關訊號Vst並輸出至該積分電路290。 該積分電路290係一包括一第九電阻291及一第五電容 292之電阻電容（RC)積分電路，該第九電阻291之一端作為 該積分電路290之輸入端並連接至該電壓比較器281之輸出 端，其另一端作為該積分電路290之輸出端並藉由該第五電 容292接地。該開關訊號Vst經過該積分電路290時，將對該 12 200841292 第五電容292進行充電，該第五電容292兩端之電壓Vc滿足 Vc=Vst(l-e-t/RC)，其中，t係充電時間，r係該第九電阻291 -之電阻值，C係該第五電容292之電容值。當充電時間t達到 該RC積分電路290之時間常數r =RC以後，該第五電容292 兩端電壓Vc上升到該開關電壓訊號Vst之大小；而當該開關 訊號vst很短暫時，該第五電容292兩端電壓vc上升到一定 程度時便開始衰減，直至該開關訊號Vst之下一個脈衝之到 來。該第五電容292兩端之電壓作為控制訊號輸出至 _該控制電路220。 該控制電路220包括一微控制器228。該微控制器228 包括一第一端口 221、一第二端口 223，且該第一端口 221 及該第二端口 223均為輸入/輸出（I/O)端口，其分別連接至 該積分電路280之輸出端及該電源電路240。當來自該積分 電路290之控制訊號Vc輸出至該第一端口 221時，若該控制 訊號Vc達到該微控制器228之門限電壓vs時，該微控制器 228控制該電源電路240向該顯示模組230進行供電，使該顯 春示裝置200處於正常工作狀態；若該控制訊號vc小於該微 控制器228之門限電壓Vs時，該微控制器228便關閉該電源 電路240對該顯示模組230之供電，使該顯示裝置200進入關 閉狀態。且，該顯示模組230可以包括一液晶顯示面板 (Liquid Crystal Display Panel，LCD Panel)、一電致發光顯 示面板（Electroluminescent Panel，EL Panel)或一 有機電致In order to solve the above problems, the industry currently provides a display device that measures whether the user leaves or not, and then controls according to the state of the user. </ br> Referring to FIG. 1 , a block diagram of a prior art display device using a detection device to implement a node-powered display device is shown. The display device (10) includes a sequence of: ί-二一路110, a control circuit 120', a power supply circuit i40, and a display core group 13A. The control circuit 12 is used by the control circuit 12 to the display module 13 The detection source circuit 110 includes an infrared ray detector. Since the human body emits a certain wavelength of infrared rays, if the infrared scent (5) is detected, the human body in front of the display device 100 is emitted. Infrared, that is, when the user of the display device 100 is in position, it sends a control signal to the control circuit 12: 'The control circuit 120 controls the power circuit 140 under the control signal V1. The display module 13G supplies power to make the display device be in a normal working state. If the infrared detector fails to detect infrared rays emitted from a human body in front of the display device 100, the user of the display device (7)^7 200841292 When it is out of position, it sends another control signal V2 to the control circuit 120, and the control circuit 12 turns off the power supply 1 to 140 to power the display module 13 under the action of the control signal %. The display device 1 is brought into a closed state. Thus, the display device 100 realizes automatic power-off when the user leaves, 'avoiding unnecessary waste of electric energy. However, since other objects in the environment surrounding the display device 100, such as 曰, are usually The light source, the book, and the like also emit infrared rays of a certain wavelength, and the detecting circuit 110 generates an interference signal. After the interference signal enters the control circuit 12, the display device 100 is not good when the user leaves. The automatic shutdown of the power supply is realized, so that the reliability of the automatic shutdown of the display device iQQ is low, so the display device 100 still brings unnecessary waste of electric energy. [Invention] In view of this, it is necessary to provide an interference cancellation. A display device for improving the reliability of automatic shutdown. A display device includes a display module, a power supply circuit, a sampling circuit for detecting a state of the user of the display device, and a filter for filtering the detection An anti-jamming circuit for detecting an interference signal generated by the circuit and a control circuit for controlling the power supply circuit to supply the display module The detection circuit, the anti-interference circuit, the control circuit, the power supply circuit and the display module are sequentially connected to the detection circuit and the anti-interference circuit to detect the state of the display device user and according to the state thereof The control circuit outputs a control signal, and the control circuit controls the power supply circuit to supply power to the display module according to the control signal. 8 200841292 Compared with the prior art, the control circuit adds an anti-dry between the control circuits =: Clothing: in addition to the detection circuit of the display device and the surface of the display device: ^: the anti-interference circuit - square side of the two aspects of filtering the human body in front of the display device: the device automatically shuts down the reliability, so that Display device:: 吏 = day inch The display device can accurately control its 幵1 〇 power supply: the power supply is automatically turned off to save power. Moreover, the hairdressing device of the present invention is controlled by the detecting circuit and the anti-jamming circuit, and the user's grievances are further in accordance with the use of the eve of the _^丄(4)... (4) Hunting is controlled by the control circuit (4) The power supply is not displayed, thereby realizing that the display device is automatically turned on, and when the user leaves the seat, the automatic shutdown is set to make the display device simple and convenient to use. [Embodiment] Referring to Figure 2, there is shown a circuit configuration diagram of a preferred embodiment of the present invention. The display device includes a detection circuit 21A, an interference private path 250, a control circuit 22A, a power supply circuit 24A, and a display module 230. The pre-measure circuit 21A, the anti-interference circuit 25A, the control circuit 220, the f-source circuit 24A and the display module 23A are sequentially connected, and the residual circuit 220 is used to control the power circuit 24 The power of the display module. The detection circuit 210 includes an infrared detector 211, a first resistor 212, a first capacitor 213 and a second capacitor 214. The infrared detector 211 can be a quantum infrared detector or a pyroelectric infrared detection device. The device includes an infrared receiving end 218, a power terminal 215, a ground terminal 216 and a signal output terminal 217. The infrared receiving end 218 is configured to receive infrared rays around the infrared detector 211. The power terminal 215 is connected to the DC power source Vcc by the first resistor 212, and the first capacitor 213 and the other one are connected in parallel with each other. The valley 214 is grounded and the ground terminal 216 is directly grounded. When the infrared detector 211 detects a certain range of infrared light in front of the display device 200, the infrared light is converted into a corresponding voltage signal VIR and is rotated by the signal output terminal 217 to the anti-interference. Circuit 250. The anti-interference circuit 250 includes a high pass filter circuit 260 and a low pass filter circuit 27 . A connected Band pass Filter Circuit (not shown), a comparison circuit 280 and an integration circuit 290. The band pass filter circuit, the comparison circuit 280, and the integrating circuit 29 are sequentially connected between the "[measurement circuit 210] and the control circuit 22?. The pass filter circuit 260 includes a first integrated operational amplifier (I) 261, a third capacitor 262, a second resistor 263, a third resistor 264, and a fourth resistor 265. The integrated transmission amplifier 261 is connected in a negative feedback manner to reduce its output resistance, and its inverting input terminal is connected to its output terminal through the third resistor 264, and its in-phase wheel terminal is connected in series with each other. The fourth resistor 265 and the second capacitor 262 are connected to the signal output end 217 of the infrared detector 211 while being grounded by the second resistor 263. When the voltage signal vIR sent by the detecting circuit 210 is rotated to the high-pass filter circuit 260, 'the capacitance of the capacitor is high due to the low frequency state, and the capacitance of the capacitor 200841292 is small in the high frequency state, so the signal is The low frequency portion will be attenuated by the third capacitor 262), and the high frequency portion thereof is substantially unaffected by the third capacitor 262. The 咼 filter and wave circuit 260 filters and removes the low frequency signal of the voltage signal Vir, and the low frequency cutoff frequency 虼 can be obtained by fi^l/(27rRC), wherein R is the fourth resistor 265 and the second resistor 263 The resistance value obtained in series, and C is the capacitance value of the third capacitor 262. The magnitude of the low frequency cutoff frequency fL can be controlled by selecting the second resistor 263, the fourth resistor 265, and the third capacitor 262 of suitable size. The high-pass filter circuit 260 can filter out the signal whose frequency is lower than fL in the voltage signal VIR and let the signal with the frequency higher than fL pass through as the output signal Vhp. The low pass filter circuit 270 includes a second integrated operational amplifier 271, a fifth resistor 272, a fourth capacitor 273, and a sixth resistor 274. The second integrated operational amplifier 271 is also connected in a negative feedback manner to reduce its output resistance. The inverting input terminal is connected to the output terminal thereof through the sixth resistor 274, and the non-inverting input terminal is connected to the fifth resistor 272 through the fifth resistor 272. The output of the first integrated operational amplifier 261 is simultaneously grounded by the fourth capacitor 273. Since the fourth capacitor 273 is connected between the ground terminal and the non-inverting input terminal of the second integrated operational amplifier 271, when the voltage signal VHP outputted by the high-pass filter circuit 260 is output to the low-pass filter circuit 270, The higher frequency portion will be rapidly attenuated due to the fourth capacitor 273 flowing to the ground, and the lower frequency portion is substantially unaffected by the fourth capacitor 273. The high-frequency cutoff frequency fH of the low-pass filter circuit 270 can also be obtained by fH = l/(2; rRC), where R is the resistance value of the fifth resistor 272, and C is the capacitance value of the fourth capacitor 273. By selecting the appropriate fifth resistor 272 and the fourth capacitor 273 such that the high frequency cutoff frequency fH of the 11 200841292 is greater than the low frequency cutoff frequency fL, the low pass filter circuit '270 implements - removes the frequency in the voltage signal Vfjp The signal of the south frequency of fη and the frequency of the frequency lower than fH is passed as the output signal VBP. Therefore, when the voltage signal Vir sent by the detecting circuit 210 passes through the band pass chopper circuit, the signal whose frequency is greater than the low frequency cutoff frequency fL and smaller than the high frequency cutoff frequency fH can pass almost all, and the frequency is greater than the high. The frequency cutoff frequency fH and the signal smaller than the low frequency cutoff frequency fL are largely attenuated. By adjusting the size of the second resistor 263, the fourth resistor 265, the fifth resistor 272, the third capacitor 262, and the fourth capacitor 273, the bandwidth of the band pass filter circuit can be controlled. The comparison circuit 280 includes a voltage comparator 281, a seventh resistor 282, and an eighth resistor 283. The non-inverting input terminal of the voltage comparator 281 is connected to the output end of the second integrated operational amplifier 271, and the inverting input terminal is connected to the DC power source Vcc via the seventh resistor 282, and is grounded by the eighth resistor 283. Its output is connected to the integration circuit 290. The seventh resistor 282 and the eighth resistor 283 divide the DC power source Vcc to determine a base 10 quasi-voltage Vrei, and the voltage comparator 281 receives the voltage signal vBP received at the non-inverting input terminal thereof and the inverting input terminal thereof. The reference voltage vref is compared to obtain a switching signal Vst and output to the integrating circuit 290. The integrating circuit 290 is a resistor-capacitor (RC) integrating circuit including a ninth resistor 291 and a fifth capacitor 292. One end of the ninth resistor 291 serves as an input terminal of the integrating circuit 290 and is connected to the voltage comparator 281. The other end of the output terminal serves as the output of the integrating circuit 290 and is grounded by the fifth capacitor 292. When the switching signal Vst passes through the integrating circuit 290, the 12200841292 fifth capacitor 292 is charged, and the voltage Vc across the fifth capacitor 292 satisfies Vc=Vst(let/RC), where t is the charging time. r is the resistance value of the ninth resistor 291 -, and C is the capacitance value of the fifth capacitor 292. After the charging time t reaches the time constant r = RC of the RC integrating circuit 290, the voltage Vc across the fifth capacitor 292 rises to the magnitude of the switching voltage signal Vst; and when the switching signal vst is short, the fifth When the voltage vc across the capacitor 292 rises to a certain degree, it begins to attenuate until a pulse follows the switching signal Vst. The voltage across the fifth capacitor 292 is output as a control signal to the control circuit 220. The control circuit 220 includes a microcontroller 228. The microcontroller 228 includes a first port 221 and a second port 223, and the first port 221 and the second port 223 are input/output (I/O) ports respectively connected to the integrating circuit 280. The output terminal and the power circuit 240. When the control signal Vc from the integrating circuit 290 is output to the first port 221, if the control signal Vc reaches the threshold voltage vs of the microcontroller 228, the microcontroller 228 controls the power circuit 240 to the display mode. The group 230 performs power supply to make the display device 200 in a normal working state; if the control signal vc is smaller than the threshold voltage Vs of the microcontroller 228, the microcontroller 228 turns off the power circuit 240 to the display module. The power supply of 230 causes the display device 200 to enter a closed state. Moreover, the display module 230 can include a liquid crystal display panel (LCD panel), an electroluminescent panel (EL Panel), or an organic electro-luminescence panel.
發光顯示面板（Organic Light Emitting Display Panel，OLEDOrganic Light Emitting Display Panel (OLED)
Panel)等。 13 200841292 自然界所有溫度高於絕對零度（-273°C)之物體均會發 ‘出紅外線，而由於物體本身之種類及溫度不同，導致其 發出之紅外線波長不同。通常人體之體溫係35°C〜37°C，人 體放射出波長為9000nm〜lOOOOnm之遠紅外線；而一般物體 若加熱至400°C〜700°C，會發出波長3000nm〜5000nm之紅外 線。因此，該顯示裝置200中，合理調整該帶通濾波電路中 該第二電阻263、該第四電阻265、該第五電阻272、該第三 電容262及該第四電容273之大小，控制該低頻截止頻率fL ⑩及該高頻截止頻率fH，便可實現該帶通濾波電路之通帶限 定為3 X 1013Ήζ〜3·3 X 1013Hz之間，即僅由波長為 9000nm〜lOOOOnm間之紅外線轉換成之電壓訊號可以順利 通過該帶通濾波電路，由此使得該顯示裝置200前方一定範 圍内僅係人體發出之紅外線可影響到該顯示裝置200之電 源電路240對其顯示模組230之供電情況。 該顯示裝置200工作時，該紅外線偵測器211偵測談顯 示裝置200前方一定範圍内之紅外線情況，並藉由其訊號輸 鲁出端217向該抗干擾電路250發出一電壓訊號VIR。此時，由 於該顯示裝置200之使用者不同之工作狀態，會出現下列三 種情況： 若該顯示裝置200之使用者在位時，由該紅外線偵測器 211之訊號輸出端217輸出之電壓訊號VIR中包含由人體發 出之紅外線引起的成份，因此該電壓訊號VIR中含有3 χ 1013Ήζ〜3·3χ1013Ηζ之頻率成份，其經過該帶通濾波電路 時，該頻率段之訊號順利通過，因此，經過濾波後之電壓 14 200841292 訊號VBP經過該比較電路280與該基準電壓Vref比較後輸出 之訊號為一南電平’該南電平輸出至該積分電路2 9 0時經該 葛五電容292充電所需之等待時間后，進入該控制電路 220，由於該高電平大於該微控制器228之門限電壓Vs，此 時該微控制器228檢測到其第一端口 221之電平後，便控制 該電源電路240對該顯示模組230進行供電，使該顯示裝置 200處於正常工作狀態。 若該顯示裝置200之使用者離位時，其前方沒有人體存 ⑩在’即該電壓訊號Vir係由周圍環境其他物體’如曰光燈、 書本或其他電子設備等引起的，該電壓訊號VIR中不含3x 1013Hz〜3·3χ1013Ηζ間之頻率成份，因此，該電壓訊號VIR 經過該帶通濾波電路之後被迅速衰減，再經過該比較電路 280與該基準電壓Vref比較後輸出之訊號為一低電平，該低 電平經該積分電路290後進入該控制電路220，由於該低電 平小於該微控制器228之門限電壓Vs，此時該微控制器228 檢測到其第一端口 221之電平後，便關閉該電源電路24Ό對 ®該顯示模組230之供電，使該顯示裝置220進入關閉狀態。 若該顯示裝置200之使用者離位，但出現其他人體於該 顯示裝置200前方經過時，該人體發出之紅外線仍會如以上 第一種情況所述導致該比較電路280輸出之訊號為一高電 平。該高電平經過該積分電路290時開始對該第五電容292 進行充電，藉由正確選擇該第五電容292及該第九電阻291 以控制該積分電路290之時間常數r，可實現控制該第五電 容292之充電速度，進而使得在人體完全於該顯示裝置200 15 200841292 前方穿過時，該第五電容292兩端之電壓仍未達到該該微控 扃器228之門限電壓Vs，因此，此時該微控制器228檢測到 其第一端口 221之電平後，該顯示裝置220繼續處於關閉狀 態。 相較於先前技術，本發明之顯示裝置200,其在該偵測 電路210及該控制電路220之間增加了該抗干擾電路250, 一 方面，該抗干擾電路250之帶通濾波電路可濾除該顯示裝置 200周圍環境其他物體發出之紅外線而引起之干擾訊號，提 籲高該顯示裝置200自動關機之可靠性，使得該顯示裝置200 之使用者離開時能準確地實現電源供電之自動關閉，節省 電能。另一方面，該抗干擾電路250藉由該積分電路290中 該第五電容292之充電，使得該控制電路220需要經過一定 等待時間再開啟該電源電路240對該顯示模組230之供電， 碟备由於人賴經過贫顧彔验罟7ΠΠ益古吝座之不ϋί?德 —^w % , i 厂gu/- ，I UcdL* ，>4 ' '4 —L— I ^ V//〇 導致該顯示裝置200產生誤動作，進一步提高該顯示裝置 200自動關機之可靠性，使得該顯示裝置200之電源供電自 鲁動關閉之功能更加準確，節省電能。且，本發明之顯示裝 置200藉由該偵測電路210及該抗干擾電路250偵測其使用 者之狀態，進而根據使用者之狀態藉由該控制電路220控制 該電源電路240對該顯示模組230之供電，由此實現當使用 者進入座位時該顯示裝置200自動開機，而當使用者離開座 位時該顯示裝置200自動關機，使得該顯示裝置200使用起 來簡單方便。 惟，本發明顯示裝置200並不限於以上實施方式所描 16 200841292 述。如，該微控制器228還可以將其另一輸入/輸出端口採 、一機械開關串接接地實現手動控制該顯示裝置200之開/ 機狀態。當本發明應用於液晶顯示裝置時，該微控制器 228還可以採用液晶顯示裝置本身之縮放控制器（Scaler)來 實現等。 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，在援依本案發明精神所作之等效修飾或變化，皆 應包含於以下申請專利範圍内。 17 200841292 【圖式簡單說明】 圖1係一種先前技術顯示裝置之結構方框圖。 圖2係本發明顯示裝置一種較佳實施方式所揭示之電路結 構圖。 【主要元件符號說明】 顯示裝置 200 偵測電路 210 控制電路 220 鲁顯示模組 230 電源電路 240 抗干擾電路 250 南通遽波電路260 低通濾波電路270 比較電路 280 積分電路 290 電容 213、214、 ® 262、273、 292 紅外線偵測器 211 電源端 215 接地端 216 訊號輸出端 217 紅外線接收端 218 第一端口 221 第二端口 223 微控制器 228 集成運算放大器 9^1 > 971 JL· Jmd s JU 比較器 281 電阻 212 、 263 、 264 、 265 、 272 、 274 〜 282 、 283 、 291 18Panel) and so on. 13 200841292 All objects in the natural world above the absolute zero (-273 °C) will emit 'infrared rays,' and the infrared wavelengths emitted by the objects vary depending on the type and temperature of the object itself. Generally, the body temperature of the human body is 35 ° C to 37 ° C, and the human body emits far infrared rays having a wavelength of 9000 nm to 1000 nm; and if the general object is heated to 400 ° C to 700 ° C, infrared rays having a wavelength of 3000 nm to 5000 nm are emitted. Therefore, in the display device 200, the size of the second resistor 263, the fourth resistor 265, the fifth resistor 272, the third capacitor 262, and the fourth capacitor 273 in the band pass filter circuit are appropriately adjusted, and the The low frequency cutoff frequency fL 10 and the high frequency cutoff frequency fH can realize that the pass band of the band pass filter circuit is limited to between 3 X 1013 Ήζ~3·3 X 1013 Hz, that is, only the infrared conversion between the wavelengths of 9000 nm and 100000 nm. The voltage signal can pass through the band pass filter circuit, so that only the infrared rays emitted by the human body in a certain range in front of the display device 200 can affect the power supply circuit 240 of the display device 200 to the display module 230. . When the display device 200 is in operation, the infrared detector 211 detects a certain range of infrared rays in front of the display device 200, and sends a voltage signal VIR to the anti-interference circuit 250 by the signal output terminal 217. At this time, due to the different working states of the user of the display device 200, the following three situations may occur: If the user of the display device 200 is in position, the voltage signal output by the signal output terminal 217 of the infrared detector 211 The VIR contains components caused by infrared rays emitted by the human body. Therefore, the voltage signal VIR contains a frequency component of 3 χ 1013 Ήζ 3 3 χ 1013 ,. When the band pass filter circuit passes, the signal of the frequency segment passes smoothly, so The filtered voltage 14 200841292 The signal VBP is compared with the reference voltage Vref by the comparison circuit 280, and the output signal is a south level. When the south level is output to the integrating circuit 2900, the battery is charged by the Gewu capacitor 292. After the waiting time is required, the control circuit 220 is entered. Since the high level is greater than the threshold voltage Vs of the microcontroller 228, after the microcontroller 228 detects the level of the first port 221, the microcontroller 228 controls the level. The power circuit 240 supplies power to the display module 230 to put the display device 200 in a normal working state. If the user of the display device 200 is out of position, there is no human body 10 in front of it, that is, the voltage signal Vir is caused by other objects in the surrounding environment, such as a neon light, a book or other electronic device, etc., the voltage signal The frequency component of 3x 1013 Hz~3·3χ1013Ηζ is not included in the VIR. Therefore, the voltage signal VIR is rapidly attenuated after passing through the band pass filter circuit, and then the signal outputted by the comparison circuit 280 is compared with the reference voltage Vref. Low level, the low level enters the control circuit 220 after the integration circuit 290. Since the low level is less than the threshold voltage Vs of the microcontroller 228, the microcontroller 228 detects the first port 221 at this time. After the level is turned off, the power supply circuit 24 is turned off to supply power to the display module 230, and the display device 220 is brought into a closed state. If the user of the display device 200 is out of position, but other human body passes in front of the display device 200, the infrared rays emitted by the human body will still cause the output signal of the comparison circuit 280 to be high as described in the first case above. Level. When the high level passes through the integrating circuit 290, the fifth capacitor 292 is charged. By correctly selecting the fifth capacitor 292 and the ninth resistor 291 to control the time constant r of the integrating circuit 290, the control can be realized. The charging speed of the fifth capacitor 292, so that the voltage across the fifth capacitor 292 does not reach the threshold voltage Vs of the micro-controller 228 when the human body passes completely in front of the display device 200 15 200841292, therefore, At this time, after the microcontroller 228 detects the level of its first port 221, the display device 220 continues to be in the off state. Compared with the prior art, the display device 200 of the present invention adds the anti-interference circuit 250 between the detection circuit 210 and the control circuit 220. On the one hand, the band-pass filter circuit of the anti-interference circuit 250 can filter In addition to the interference signal caused by the infrared rays emitted by other objects in the environment around the display device 200, the reliability of the automatic shutdown of the display device 200 is increased, so that the user of the display device 200 can accurately turn off the power supply automatically when the user of the display device 200 leaves. , saving energy. On the other hand, the anti-interference circuit 250 is charged by the fifth capacitor 292 in the integration circuit 290, so that the control circuit 220 needs to wait for a certain waiting time to turn on the power supply circuit 240 to supply power to the display module 230.备 由于 彔 彔 ΠΠ ΠΠ ΠΠ ΠΠ ϋ ϋ ϋ ϋ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ The display device 200 is caused to malfunction, and the reliability of the automatic shutdown of the display device 200 is further improved, so that the power supply of the display device 200 is more accurate and the power is saved. The display device 200 of the present invention detects the state of the user by the detecting circuit 210 and the anti-interference circuit 250, and controls the power module 240 to control the display mode according to the state of the user. The power supply of the group 230 is realized, so that the display device 200 is automatically turned on when the user enters the seat, and the display device 200 is automatically turned off when the user leaves the seat, so that the display device 200 is simple and convenient to use. However, the display device 200 of the present invention is not limited to the above described embodiment 16 200841292. For example, the microcontroller 228 can also manually control the on/off state of the display device 200 by connecting its other input/output port and a mechanical switch in series. When the present invention is applied to a liquid crystal display device, the microcontroller 228 can also be implemented by using a scale controller of the liquid crystal display device itself. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or changes in the spirit of the invention. All should be included in the scope of the following patent application. 17 200841292 [Simplified description of the drawings] Fig. 1 is a block diagram showing the structure of a prior art display device. Fig. 2 is a circuit diagram showing a preferred embodiment of the display device of the present invention. [Main component symbol description] Display device 200 Detection circuit 210 Control circuit 220 Lu display module 230 Power circuit 240 Anti-interference circuit 250 Nantong chopper circuit 260 Low-pass filter circuit 270 Comparison circuit 280 Integral circuit 290 Capacitors 213, 214, ® 262, 273, 292 Infrared Detector 211 Power Terminal 215 Ground Terminal 216 Signal Output 217 Infrared Receiver 218 First Port 221 Second Port 223 Microcontroller 228 Integrated Operational Amplifier 9^1 > 971 JL· Jmd s JU Comparator 281 resistors 212, 263, 264, 265, 272, 274~ 282, 283, 291 18