TWI382662B - Pir detector and control method thereof - Google Patents
Pir detector and control method thereof Download PDFInfo
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本案是關於一種焦電型紅外線偵測器，特別是關於焦電型紅外線偵測器的控制電路。This case is about a pyroelectric type infrared detector, especially the control circuit of the pyroelectric type infrared detector.
有鑑於目前環保意識抬頭，對於講求節能的感測裝置之需求亦日益強烈。目前市面上最常見的燈源自動控制裝置是以諸如焦電型紅外線偵測器(Pyroelectric Infrared Sensor,PIR)居多；此裝置普遍適用於居家、辦公室、公用場所等，而焦電型紅外線偵測器本身是用來偵測人體紅外線，進而觸發燈具或保安系統。In view of the current awareness of environmental protection, the demand for energy-saving sensing devices is also growing. At present, the most common light source automatic control device on the market is such as Pyroelectric Infrared Sensor (PIR); this device is generally suitable for home, office, public places, etc., and the focus type infrared detection The device itself is used to detect infrared light from the human body, which in turn triggers the luminaire or security system.
一般來說，焦電型紅外線偵測器所架設的位置通常處於高處或是無市電供應處，而偵測器所使用的電源常為電池，因此偵測器本身的耗電性便相對重要。焦電型紅外線偵測器的控制IC所需的平均耗電量一般為100uA～500uA不等，若以電池的平均每顆耗電量為1A/h來計算，在平均耗電量為100uA的待機狀態下可使用約1年的時間。由此可看出，若可減少控制IC的平均耗電量，則將可為使用者帶來更長久的使用時間。In general, the position of the pyroelectric infrared detector is usually at a high position or no mains supply, and the power used by the detector is often a battery, so the power consumption of the detector itself is relatively important. . The average power consumption required for the control IC of the pyroelectric type infrared detector is generally 100uA to 500uA. If the average power consumption per battery is 1A/h, the average power consumption is 100uA. It can be used for about 1 year in standby mode. It can be seen that if the average power consumption of the control IC can be reduced, the user can be brought longer.
另一方面，焦電型紅外線偵測器的控制IC本身若需進行多重偵測功能(諸如：亮度偵測或低電壓偵測)，則目前現有的焦電型紅外線偵測器的控制IC的所需封裝腳位之數量將變得相當多。因此，其在IC設計與封裝上的成本亦隨之提高，相對的也將提高電路的設計面積。On the other hand, if the control IC of the pyroelectric type infrared detector itself needs to perform multiple detection functions (such as brightness detection or low voltage detection), the control IC of the existing pyroelectric type infrared detector is currently available. The number of required package pins will become quite large. Therefore, the cost of IC design and packaging will also increase, and the circuit design area will be increased.
如第一圖所示，其為一種習用焦電型紅外線偵測器的電路方塊圖。如第一圖所示，焦電型紅外線偵測器1主要是由控制積體電路(IC)10、光敏(CDS)偵測電路11、低電壓偵測電路12以及蜂鳴器13所構成。焦電型紅外線偵測器1是利用CDS偵測電路11對環境進行偵測，以判別周圍現在是白天或是晚上；當偵測到現在是白天時，控制IC10會自動關閉焦電型紅外線偵測器1內的數位電路架構以求省電，但其中的類比放大器與窗型比較器(未顯示)並不會被關閉。這是因為若是焦電型紅外線偵測器在保持類比放大器與窗型比較器於開啟的狀態下，若偵測到現在是晚上時才可立即反應出信號是否正確或有效。相反地，若是將類比放大器與窗型比較器關閉，則焦電型紅外線偵測器便需要較長時間方能將類比放大器重新起動。As shown in the first figure, it is a circuit block diagram of a conventional pyroelectric type infrared detector. As shown in the first figure, the pyroelectric type infrared detector 1 is mainly composed of a control integrated circuit (IC) 10, a photosensitive (CDS) detecting circuit 11, a low voltage detecting circuit 12, and a buzzer 13. The pyroelectric type infrared detector 1 uses the CDS detection circuit 11 to detect the environment to determine whether the surroundings are day or night. When it is detected that it is daytime, the control IC 10 automatically turns off the focus type infrared detection. The digital circuit architecture in the detector 1 is designed to save power, but the analog amplifier and window comparator (not shown) are not turned off. This is because if the pyroelectric type infrared detector maintains the analog amplifier and the window type comparator in the open state, it can immediately reflect whether the signal is correct or valid if it is detected at night. Conversely, if the analog amplifier and the window comparator are turned off, the pyroelectric infrared detector takes a long time to restart the analog amplifier.
另一方面，由第一圖還可看出，習用的焦電型紅外線偵測器在用於電源偵測的低電壓偵測電路12中，大都採用電阻分壓的方法來對電池電力Vcc進行檢測；然而，電阻阻抗大時雖然比較省電，但信號容易受到干擾，導致低電壓偵測電路12很容易被誤啟動。On the other hand, it can be seen from the first figure that the conventional pyroelectric type infrared detector uses the resistor voltage division method for the battery power Vcc in the low voltage detecting circuit 12 for power source detection. Detection; however, although the resistance is relatively large, although the power is relatively low, the signal is susceptible to interference, and the low voltage detection circuit 12 is easily accidentally activated.
因此，有必要構思一種焦電型紅外線偵測器，最好只需要使用控制IC的三隻接腳即可完成CDS偵測、低電壓偵測及蜂鳴器呼叫等功能(傳統作法如第一圖所示般最少需要四隻接腳)，並且希望能耗費比傳統作法更少的電力。Therefore, it is necessary to conceive a pyroelectric type infrared detector. It is best to use only the three pins of the control IC to perform functions such as CDS detection, low voltage detection and buzzer call (traditional practice such as first As shown in the figure, at least four pins are required, and it is desirable to consume less electricity than conventional methods.
根據上述構想，本案一方面提出一種焦電型紅外線偵測器，受控於一電池電力，包括：一控制積體電路(IC)，內部具有至少一類比放大器，該控制積體電路具有一第一端、一第二端及一第三端；一光敏(CDS)偵測電路，由至少一個光敏電阻及一個電阻彼此串聯所構成，該光敏偵測電路的一端受控於該電池電力，另一端電連接於該控制積體電路的該第一端，用以偵測該焦電型紅外線偵測器所處的環境是否為白天；一低電壓偵測電路，由至少二個電阻彼此串聯所構成，該低電壓偵測電路的一端受控於該電池電力，另一端電連接於該光敏偵測電路與該控制積體電路互相電連接的那一端，用以偵測該電池電力是否過低；及一蜂鳴器，一端經由該光敏偵測電路中的一串聯分壓節點而電連接於該控制積體電路的該第二端，另一端經由該低電壓偵測電路中的一串聯分壓節點而電連接於該控制積體電路的該第三端；其中，當該光敏偵測電路偵測到該焦電型紅外線偵測器所處的環境是白天時，該控制積體電路關閉該類比放大器以節省該電池電力，當該光敏偵測電路偵測到該焦電型紅外線偵測器所處的環境不是白天時，該控制積體電路開啟該類比放大器，而當該低電壓偵測電路偵測到該電池電力過低時，該控制積體電路開啟該蜂鳴器以通知使用者。According to the above concept, the present invention proposes a pyroelectric type infrared detector controlled by a battery power, comprising: a control integrated circuit (IC) having at least one analog amplifier therein, the control integrated circuit having a first One end, a second end and a third end; a photosensitive (CDS) detecting circuit, wherein at least one photoresistor and a resistor are connected in series with each other, one end of the photo detecting circuit is controlled by the battery power, and One end is electrically connected to the first end of the control integrated circuit for detecting whether the environment in which the pyroelectric infrared detector is located is daylight; and a low voltage detecting circuit is connected in series by at least two resistors The one end of the low voltage detecting circuit is controlled by the battery power, and the other end is electrically connected to the end of the photo detecting circuit and the control integrated circuit electrically connected to detect whether the battery power is too low. And a buzzer, one end is electrically connected to the second end of the control integrated circuit via a series voltage dividing node in the photosensitive detecting circuit, and the other end is connected through a series in the low voltage detecting circuit The node is electrically connected to the third end of the control integrated circuit; wherein, when the photosensitive detecting circuit detects that the environment in which the pyroelectric infrared detector is located is daytime, the control integrated circuit turns off the Analog amplifier to save the battery power, when the photodetection circuit detects that the environment of the pyroelectric infrared detector is not daytime, the control integrated circuit turns on the analog amplifier, and when the low voltage detection When the circuit detects that the battery power is too low, the control integrated circuit turns on the buzzer to notify the user.
根據上述構想，本案另一方面提出一種焦電型紅外線偵測器的控制方法，該焦電型紅外線偵測器至少包括一電池、一光敏(CDS)偵測電路及一低電壓偵測電路，該控制方法包括步驟如下：當該光敏偵測電路偵測到該焦電型紅外線偵測器所處的環境是白天時，節省該焦電型紅外線偵測器受控於該電池的電力；當該低電壓偵測電路偵測到該電池的電力過低時，通知該焦電型紅外線偵測器的使用者；且當該光敏偵測電路進行偵測或當該低電壓偵測電路進行偵測時，停止該焦電型紅外線偵測器進行紅外線偵測。本案得藉由下列圖式及詳細說明，俾得更深入之了解：According to the above concept, another aspect of the present invention provides a control method for a pyroelectric type infrared detector, the focus type infrared detector comprising at least a battery, a photosensitive (CDS) detecting circuit and a low voltage detecting circuit. The control method includes the following steps: when the photodetection circuit detects that the environment in which the pyroelectric infrared detector is located is daytime, saving the power of the pyroelectric type infrared detector controlled by the battery; The low voltage detecting circuit notifies the user of the pyroelectric type infrared detector when the power of the battery is too low; and when the light detecting circuit detects or when the low voltage detecting circuit detects During the measurement, the pyroelectric infrared detector is stopped for infrared detection. This case can be further understood by the following diagrams and detailed explanations:
請參閱第二圖，其為本案所提出之焦電型紅外線偵測器一較佳實施例的電路方塊圖。在第二圖中，焦電型紅外線偵測器2是受控於一電池電力Vcc，焦電型紅外線偵測器2主要是由一控制積體電路(IC)20、一光敏(CDS)偵測電路21、一低電壓(LVD)偵測電路22及一蜂鳴器23所構成。Please refer to the second figure, which is a circuit block diagram of a preferred embodiment of the pyroelectric type infrared detector proposed in the present application. In the second figure, the pyroelectric type infrared detector 2 is controlled by a battery power Vcc, and the pyroelectric type infrared detector 2 is mainly controlled by a control integrated circuit (IC) 20 and a photosensitive (CDS). The measuring circuit 21, a low voltage (LVD) detecting circuit 22 and a buzzer 23 are formed.
控制積體電路(IC)20的內部具有至少一類比放大器(未圖示)，控制積體電路20具有一第一端T1、一第二端T2及一第三端T3。以下分別敘述三個端點的連接方法。The control integrated circuit (IC) 20 has at least one analog amplifier (not shown) therein, and the control integrated circuit 20 has a first terminal T1, a second terminal T2 and a third terminal T3. The following describes the connection method of the three endpoints separately.
光敏(CDS)偵測電路21是由至少一個光敏電阻及一個電阻彼此串聯所構成，光敏偵測電路21的一端受控於電池電力Vcc，另一端電連接於控制積體電路20的該第一端T1，用以偵測焦電型紅外線偵測器2所處的環境是否為白天。The photosensitive (CDS) detecting circuit 21 is composed of at least one photoresistor and a resistor connected in series with each other. One end of the photo detecting circuit 21 is controlled by the battery power Vcc, and the other end is electrically connected to the first of the control integrated circuit 20. The terminal T1 is configured to detect whether the environment in which the pyroelectric infrared detector 2 is located is daytime.
低電壓偵測電路22是由至少二個電阻彼此串聯所構成，低電壓偵測電路22的一端受控於電池電力Vcc，另一端電連接於光敏偵測電路21與控制積體電路20互相電連接的那一端，用以偵測電池電力Vcc是否過低。The low voltage detecting circuit 22 is formed by connecting at least two resistors in series. One end of the low voltage detecting circuit 22 is controlled by the battery power Vcc, and the other end is electrically connected to the photosensitive detecting circuit 21 and the control integrated circuit 20 to be electrically connected to each other. The connected end is used to detect whether the battery power Vcc is too low.
蜂鳴器23的一端經由光敏偵測電路21中的一串聯分壓節點而電連接於控制積體電路20的該第二端CDS/BUZB，另一端經由該低電壓偵測電路中的一串聯分壓節點而電連接於該控制積體電路的該第三端LVD/BUZ。One end of the buzzer 23 is electrically connected to the second end CDS/BUZB of the control integrated circuit 20 via a series voltage dividing node in the photosensitive detecting circuit 21, and the other end is connected in series through the low voltage detecting circuit. The voltage dividing node is electrically connected to the third end LVD/BUZ of the control integrated circuit.
焦電型紅外線偵測器2的作動為，當光敏偵測電路21偵測到焦電型紅外線偵測器2所處的環境是白天時，控制積體電路20關閉該類比放大器以節省電池電力Vcc，當該光敏偵測電路偵測到該焦電型紅外線偵測器所處的環境不是白天時，該控制積體電路開啟該類比放大器。而當該低電壓偵測電路偵測到該電池電力過低時，該控制積體電路開啟該蜂鳴器以通知使用者。The operation of the pyroelectric type infrared detector 2 is such that when the photosensitive detecting circuit 21 detects that the environment in which the pyroelectric type infrared detector 2 is located is daytime, the control integrated circuit 20 turns off the analog amplifier to save battery power. Vcc, when the photodetection circuit detects that the environment of the pyroelectric type infrared detector is not daytime, the control integrated circuit turns on the analog amplifier. When the low voltage detecting circuit detects that the battery power is too low, the control integrated circuit turns on the buzzer to notify the user.
當然，蜂鳴器23更可額外電連接於發光二極體(LED)，以配合23蜂鳴器來通知使用者。Of course, the buzzer 23 can be additionally electrically connected to the light emitting diode (LED) to cooperate with the 23 buzzer to notify the user.
本發明基本上是在控制IC中僅利用三端接腳便可進行低電壓(LVD)偵測與CDS偵測，並且還包括了蜂鳴器的警告功能，而在該三端的偵測上採用分時偵測；亦即，第二端T2的CDS偵測及第三端T3的LVD偵測是與第一端T1的紅外線(PIR)偵測採取分時判斷。也就是說，當進行第二端T2的CDS偵測及第三端T3的LVD偵測時，則停止第一端T1的PIR偵測；而當進行第一端T1的PIR偵測時，則停止第二端T2的CDS偵測及第三端T3的LVD偵測。The invention basically performs low voltage (LVD) detection and CDS detection by using only three-terminal pins in the control IC, and also includes a buzzer warning function, and adopts the three-terminal detection. Time-series detection; that is, the CDS detection of the second end T2 and the LVD detection of the third end T3 are determined by using the infrared ray (PIR) detection of the first end T1. That is, when the CDS detection of the second end T2 and the LVD detection of the third end T3 are performed, the PIR detection of the first end T1 is stopped; and when the PIR detection of the first end T1 is performed, Stop the CDS detection of the second end T2 and the LVD detection of the third end T3.
因此，不但可大幅降低耗電並兼顧信號穩定性，還可達到系統在環境變化下依然兼顧省電與效能的優點。此外，本發明更在一固定時間內進行低電壓偵測，使得耗電量僅是傳統低電壓偵測方法的1/50；而當要驅動蜂鳴器時，因不會影響外部的CDS與LVD電阻電路，因此可以確實反映出警告聲而不被影響。Therefore, not only can the power consumption be greatly reduced, but also the signal stability can be considered, and the system can still achieve the advantages of power saving and efficiency under environmental changes. In addition, the present invention performs low voltage detection in a fixed time period, so that the power consumption is only 1/50 of the conventional low voltage detection method; and when the buzzer is to be driven, it does not affect the external CDS and The LVD resistor circuit can therefore accurately reflect the warning sound without being affected.
請參閱第三圖，其為應用於本案之焦電型紅外線偵測器之控制IC的一種實施例的電路方塊圖。在第三圖中，控制IC30更包含了一紅外線偵測電路40，用以偵測使用者的出現。在本圖中，控制IC30主要是利用三端接腳31、32及34來進行CDS偵測、低電壓偵測及蜂鳴器呼叫等功能。Please refer to the third figure, which is a circuit block diagram of an embodiment of a control IC applied to the pyroelectric type infrared detector of the present invention. In the third figure, the control IC 30 further includes an infrared detecting circuit 40 for detecting the presence of the user. In the figure, the control IC 30 mainly uses the three-terminal pins 31, 32 and 34 for CDS detection, low voltage detection and buzzer call.
當控制IC30進行CDS偵測及低電壓偵測時，會將第一端34的電位拉低，使得低電壓偵測端LVD/BUZ與CDS偵測端CDS/BUZB測得目前分壓電阻後的電壓準位。詳言之，若CDS/BUZ電位低於設定準位VL，則焦電型紅外線偵測器會得知外部環境為白天，此時控制IC30會關閉類比放大器38與39，讓焦電型紅外線偵測器擁有更低的耗電；另一方面，若低電壓偵測端LVD/BUZ的電位低於設定準位VH，則焦電型紅外線偵測器將會測知低電壓，此時控制IC會透過蜂鳴器驅動器33以利用蜂鳴器(未圖示)來告知使用者該換電池。When the control IC 30 performs CDS detection and low voltage detection, the potential of the first terminal 34 is pulled low, so that the low voltage detection terminal LVD/BUZ and the CDS detection terminal CDS/BUZB measure the current voltage dividing resistor. Voltage level. In detail, if the CDS/BUZ potential is lower than the set level VL, the pyroelectric type infrared detector will know that the external environment is daytime. At this time, the control IC30 will turn off the analog amplifiers 38 and 39 to allow the pyroelectric type infrared detector. The detector has lower power consumption; on the other hand, if the potential of the low voltage detection terminal LVD/BUZ is lower than the set level VH, the pyroelectric type infrared detector will detect the low voltage, and the control IC The buzzer (not shown) is used to inform the user through the buzzer driver 33 to change the battery.
關於前面所提到的分時偵測機制，在第三圖的控制IC30中，是利用開關S1～S4來達成第二端的CDS偵測及第三端的LVD偵測與紅外線偵測電路40之間的分時偵測。詳言之，當欲進行第二端31的CDS偵測及第三端32的LVD偵測時，開關S3與S4會被切換成使得第一端34與比較器35、36之間斷開，而能夠停止第一端34的PIR偵測；而當欲進行紅外線偵測電路40的PIR偵測時，開關S3與S4會被切換成使得第二端31與比較器35之間斷開、且第三端32與比較器36之間斷開，而能夠停止第二端T2的CDS偵測及第三端T3的LVD偵測。Regarding the time-sharing detection mechanism mentioned above, in the control IC 30 of the third figure, the switches S1 to S4 are used to achieve the second-end CDS detection and the third-end LVD detection and the infrared detection circuit 40. Time-sharing detection. In detail, when the CDS detection of the second end 31 and the LVD detection of the third end 32 are to be performed, the switches S3 and S4 are switched such that the first end 34 is disconnected from the comparators 35, 36, and The PIR detection of the first end 34 can be stopped; and when the PIR detection of the infrared detection circuit 40 is to be performed, the switches S3 and S4 are switched such that the second end 31 and the comparator 35 are disconnected, and the third The terminal 32 is disconnected from the comparator 36, and the CDS detection of the second terminal T2 and the LVD detection of the third terminal T3 can be stopped.
請參閱第四圖，其為本案所提出之焦電型紅外線偵測器之控制方法一較佳實施例的流程圖。如第四圖所示，在電源啟動後，系統隨即進入焦電型紅外線(PIR)快速熱機啟動，在進行紅外線偵測時，主要分為光敏(CDS)偵測與低電壓(LVD)偵測二種。Please refer to the fourth figure, which is a flow chart of a preferred embodiment of the control method of the pyroelectric type infrared detector proposed in the present application. As shown in the fourth figure, after the power is turned on, the system then enters the pyroelectric infrared (PIR) fast heat engine to start. When performing infrared detection, it is mainly divided into photosensitive (CDS) detection and low voltage (LVD) detection. Two kinds.
在進行光敏偵測時，當光敏偵測電路偵測到所處環境是白天時，控制IC隨即關閉低頻放大器；相反地，當光敏偵測電路偵測到所處環境不是白天時，控制IC隨即開啟低頻放大器。When performing photo-sensing detection, when the photo-sensing circuit detects that the environment is daytime, the control IC then turns off the low-frequency amplifier; conversely, when the photo-sensing circuit detects that the environment is not daytime, the control IC immediately Turn on the low frequency amplifier.
另一方面，在進行低電壓偵測時，當偵測到電池電力低於標準時，此時控制IC啟動低電壓供給，並啟動蜂鳴器(或發光二極體)以通知使用者更換電池。On the other hand, when low voltage detection is performed, when the battery power is detected to be lower than the standard, the control IC starts the low voltage supply and activates the buzzer (or the light emitting diode) to notify the user to replace the battery.
綜上所述，本發明主要提出一種焦電型紅外線偵測器，只需要使用控制IC的三隻接腳即可完成CDS偵測、低電壓偵測及蜂鳴器呼叫等功能，能耗費比傳統作法更少的電力。In summary, the present invention mainly proposes a pyroelectric type infrared detector, which only needs to use the three pins of the control IC to complete functions such as CDS detection, low voltage detection and buzzer call, and energy consumption ratio. Traditionally, less electricity is available.
本案得由熟悉本技藝之人士任施匠思而為諸般修飾，然皆不脫如附申請專利範圍所欲保護者。This case has been modified by people who are familiar with the art, but it is not intended to be protected by the scope of the patent application.
1．．．焦電型紅外線偵測器1. . . Pyroelectric infrared detector
10．．．控制IC10. . . Control IC
11．．．CDS偵測電路11. . . CDS detection circuit
12．．．低電壓偵測電路12. . . Low voltage detection circuit
13．．．蜂鳴器13. . . buzzer
2．．．焦電型紅外線偵測器2. . . Pyroelectric infrared detector
20．．．控制IC20. . . Control IC
21．．．CDS偵測電路twenty one. . . CDS detection circuit
22．．．低電壓偵測電路twenty two. . . Low voltage detection circuit
23．．．蜂鳴器twenty three. . . buzzer
30．．．控制IC30. . . Control IC
31．．．第二端31. . . Second end
32．．．第三端32. . . Third end
33．．．蜂鳴器驅動器33. . . Buzzer driver
34．．．第一端34. . . First end
35．．．比較器35. . . Comparators
36．．．比較器36. . . Comparators
37．．．信號處理器37. . . Signal processor
38．．．類比放大器38. . . Analog amplifier
39．．．類比放大器39. . . Analog amplifier
40．．．紅外線偵測電路40. . . Infrared detection circuit
T1．．．第一端T1. . . First end
T2．．．第二端T2. . . Second end
T3．．．第三端T3. . . Third end
S1～S4．．．開關S1 ~ S4. . . switch
第一圖：一種習用焦電型紅外線偵測器的電路方塊圖。The first picture: a circuit block diagram of a conventional pyroelectric type infrared detector.
第二圖：本案所提出之焦電型紅外線偵測器一較佳實施例的電路方塊圖。Second: A block diagram of a preferred embodiment of a pyroelectric infrared detector proposed in the present application.
第三圖：應用於本案之焦電型紅外線偵測器之控制IC的一種實施例的電路方塊圖。Fig. 3 is a circuit block diagram showing an embodiment of a control IC applied to the pyroelectric type infrared detector of the present invention.
第四圖：本案所提出之焦電型紅外線偵測器之控制方法一較佳實施例的流程圖。Fourth: A flow chart of a preferred embodiment of the control method of the pyroelectric type infrared detector proposed in the present application.
2．．．焦電型紅外線偵測器2. . . Pyroelectric infrared detector
20．．．控制IC20. . . Control IC
21．．．CDS偵測電路twenty one. . . CDS detection circuit
22．．．低電壓偵測電路twenty two. . . Low voltage detection circuit
23．．．蜂鳴器twenty three. . . buzzer
T1．．．第一端T1. . . First end
T2．．．第二端T2. . . Second end
T3．．．第三端T3. . . Third end
Claims (6)
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| TW98115930A TWI382662B (en) | 2009-05-13 | 2009-05-13 | Pir detector and control method thereof |
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| TW98115930A TWI382662B (en) | 2009-05-13 | 2009-05-13 | Pir detector and control method thereof |
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| TWI382662B true TWI382662B (en) | 2013-01-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419658A (en) * | 1981-04-01 | 1983-12-06 | T. J. Company | Portable combination lamp, smoke detector and power failure alarm |
| US5499016A (en) * | 1992-02-17 | 1996-03-12 | Aritech B.V. | Intrusion alarm system |
| US20020101350A1 (en) * | 2000-09-22 | 2002-08-01 | Thompson Rick L. | Method, apparatus, and system for remote baby monitoring with additional functions |
| TWM248185U (en) * | 2003-10-27 | 2004-10-21 | Everspring Ind Co Ltd | Illumination device |
-
2009
- 2009-05-13 TW TW98115930A patent/TWI382662B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419658A (en) * | 1981-04-01 | 1983-12-06 | T. J. Company | Portable combination lamp, smoke detector and power failure alarm |
| US5499016A (en) * | 1992-02-17 | 1996-03-12 | Aritech B.V. | Intrusion alarm system |
| US20020101350A1 (en) * | 2000-09-22 | 2002-08-01 | Thompson Rick L. | Method, apparatus, and system for remote baby monitoring with additional functions |
| TWM248185U (en) * | 2003-10-27 | 2004-10-21 | Everspring Ind Co Ltd | Illumination device |
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| TW201041304A (en) | 2010-11-16 |
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