TWI701975B - Lamp failure detection device - Google Patents

Lamp failure detection device Download PDF

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TWI701975B
TWI701975B TW108134214A TW108134214A TWI701975B TW I701975 B TWI701975 B TW I701975B TW 108134214 A TW108134214 A TW 108134214A TW 108134214 A TW108134214 A TW 108134214A TW I701975 B TWI701975 B TW I701975B
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voltage
electrically connected
circuit
input
input terminal
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TW108134214A
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TW202114472A (en
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許益銘
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璨揚企業股份有限公司
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Priority to PCT/US2020/020677 priority patent/WO2021061187A1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel array of LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/24—Circuit arrangements for protecting against overvoltage

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一種燈具故障偵測裝置包含：一接收一輸入電壓的輸入端；一定電流產生電路，根據來自該輸入端之該輸入電壓產生一定電流以驅動N個燈具；N個電壓偵測電路，分別偵測該N個燈具的跨壓以分別產生N個偵測電壓；一控制電路，根據該N個偵測電壓及一預定電壓值判斷是否有燈具故障並產生一控制信號；一接收來自該輸入端之該輸入電壓的負載電路；及一開關電路，接收來自該控制電路的該控制信號，並根據該控制信號而導通或不導通，當該開關電路導通時，一相關於該輸入電壓的輸入電流經由該負載電路與該開關電路流入地。A lamp failure detection device includes: an input terminal that receives an input voltage; a certain current generation circuit, which generates a certain current according to the input voltage from the input terminal to drive N lamps; N voltage detection circuits, respectively detect The cross voltages of the N lamps are used to generate N detection voltages respectively; a control circuit determines whether there is a lamp failure according to the N detection voltages and a predetermined voltage value and generates a control signal; a control signal is received from the input terminal The load circuit of the input voltage; and a switch circuit that receives the control signal from the control circuit and is turned on or off according to the control signal. When the switch circuit is turned on, an input current related to the input voltage passes through The load circuit and the switch circuit flow into the ground.

Description

燈具故障偵測裝置Lamp failure detection device

本發明是有關於一種偵測裝置，特別是指一種燈具故障偵測裝置。The invention relates to a detection device, in particular to a lamp failure detection device.

現有燈具故障偵測裝置是藉由偵測流入所有燈具(例如，車用方向燈)的一總電流，以判斷燈具是否故障。詳細來說，當現有燈具故障偵測裝置偵測出該總電流趨近於零時(即，所有燈具皆故障)，其才能判斷出燈具發生故障並通知使用者。也就是說，若非所有燈具皆故障，則現有燈具故障偵測裝置無法判斷出有燈具發生故障，導致現有燈具故障偵測裝置具有較差的偵測靈敏度。因此，現有燈具故障偵測裝置仍有改進的空間。The existing lamp failure detection device detects a total current flowing into all lamps (for example, vehicle direction lamps) to determine whether the lamps are malfunctioning. In detail, when the existing lamp failure detection device detects that the total current approaches zero (that is, all lamps are faulty), it can determine that the lamp is malfunctioning and notify the user. That is to say, if not all lamps are faulty, the existing lamp failure detection device cannot determine that there is a lamp failure, resulting in poor detection sensitivity of the existing lamp failure detection device. Therefore, there is still room for improvement in the existing lamp failure detection device.

因此，本發明之目的，即在提供一種可提升偵測靈敏度的燈具故障偵測裝置。Therefore, the purpose of the present invention is to provide a lamp failure detection device that can improve the detection sensitivity.

於是，本發明燈具故障偵測裝置適用於偵測N個燈具，N≧1，N為正整數，該燈具故障偵測裝置包含一輸入端、一定電流產生電路、N個電壓偵測電路、一控制電路、一負載電路，及一開關電路。Therefore, the lamp failure detection device of the present invention is suitable for detecting N lamps, N≧1, and N is a positive integer. The lamp failure detection device includes an input terminal, a certain current generation circuit, N voltage detection circuits, and a Control circuit, a load circuit, and a switch circuit.

該輸入端用於接收一輸入電壓。The input terminal is used to receive an input voltage.

該定電流產生電路電連接在該輸入端與該N個燈具之間，接收來自該輸入端之該輸入電壓，並根據該輸入電壓產生一定電流以驅動該N個燈具。The constant current generating circuit is electrically connected between the input terminal and the N lamps, receives the input voltage from the input terminal, and generates a certain current according to the input voltage to drive the N lamps.

該N個電壓偵測電路分別與該N個燈具並聯連接，且分別偵測該N個燈具的跨壓，以分別產生N個偵測電壓。The N voltage detection circuits are respectively connected in parallel with the N lamps, and respectively detect the cross voltages of the N lamps to generate N detection voltages respectively.

該控制電路電連接該N個電壓偵測電路以接收該N個偵測電壓，且根據該N個偵測電壓及一預定電壓值判斷是否有燈具故障並產生一控制信號。The control circuit is electrically connected to the N voltage detection circuits to receive the N detection voltages, and based on the N detection voltages and a predetermined voltage value, determines whether there is a lamp failure and generates a control signal.

該負載電路具有一電連接該輸入端以接收該輸入電壓的第一端，及一第二端。The load circuit has a first terminal electrically connected to the input terminal to receive the input voltage, and a second terminal.

該開關電路電連接該負載電路的該第二端、該控制電路及地，接收來自該控制電路的該控制信號，並根據該控制信號而導通或不導通，當該開關電路導通時，一相關於該輸入電壓的輸入電流經由該負載電路與該開關電路流入地。The switch circuit is electrically connected to the second end of the load circuit, the control circuit and the ground, receives the control signal from the control circuit, and is turned on or off according to the control signal. When the switch circuit is turned on, a related The input current at the input voltage flows into the ground through the load circuit and the switch circuit.

本發明之功效在於：利用該控制電路根據該N個電壓偵測電路所產生的該N個偵測電壓進行燈具故障偵測判斷，可提升本發明燈具故障偵測裝置的偵測靈敏度。The effect of the present invention is that the control circuit is used to perform lamp failure detection judgment based on the N detection voltages generated by the N voltage detection circuits, which can improve the detection sensitivity of the lamp failure detection device of the present invention.

參閱圖1，本發明燈具故障偵測裝置的一實施例適用於安裝在一載具(圖未示)中，以偵測該載具中的N個燈具10是否故障，N≧1，N為正整數。需說明的是，該載具可以是純電動車或複合(hybrid)電動車，且可以呈例如機車、汽車或巴士的形式，但不限於此。Referring to Figure 1, an embodiment of the lamp failure detection device of the present invention is suitable for being installed in a carrier (not shown) to detect whether N lamps 10 in the carrier are faulty, N≧1, N is Positive integer. It should be noted that the vehicle may be a pure electric vehicle or a hybrid electric vehicle, and may be in the form of, for example, a locomotive, automobile, or bus, but is not limited thereto.

在本實施例中，該燈具故障偵測裝置包含一用於接收一輸入電壓Vi的輸入端Q1、一突波保護元件1、一定電流產生電路2、N個電壓偵測電路3、一控制電路4、一電源供應電路5、一負載電路6、一開關電路7，及一行車電腦8。以下舉N=2為例進行說明，但不限於此。In this embodiment, the lamp failure detection device includes an input terminal Q1 for receiving an input voltage Vi, a surge protection element 1, a certain current generation circuit 2, N voltage detection circuits 3, and a control circuit 4. A power supply circuit 5, a load circuit 6, a switch circuit 7, and a car computer 8. The following takes N=2 as an example for description, but it is not limited to this.

該突波保護元件1電連接在該輸入端Q1與地之間。在本實施例中，該突波保護元件1包括一瞬態電壓抑制二極體11，電連接在該輸入端Q1與地之間。The surge protection element 1 is electrically connected between the input terminal Q1 and the ground. In this embodiment, the surge protection element 1 includes a transient voltage suppression diode 11 electrically connected between the input terminal Q1 and the ground.

該定電流產生電路2電連接在該輸入端Q1與該二(N=2)個燈具10之間，接收來自該輸入端Q1之該輸入電壓Vi，並根據該輸入電壓Vi產生一定電流Io以驅動該N個燈具10。進一步參閱圖2，在本實施例中，該定電流產生電路2包括一二極體21、第一及第二電容22、26、一穩壓晶片23，及第一至第三電阻24、25、27。The constant current generating circuit 2 is electrically connected between the input terminal Q1 and the two (N=2) lamps 10, receives the input voltage Vi from the input terminal Q1, and generates a constant current Io according to the input voltage Vi. Drive the N lamps 10. Further referring to FIG. 2, in this embodiment, the constant current generating circuit 2 includes a diode 21, first and second capacitors 22, 26, a voltage stabilizing chip 23, and first to third resistors 24, 25 , 27.

該二極體21具有一電連接該輸入端Q1以接收該輸入電壓Vi的陽極，及一陰極。該第一電容22電連接在該二極體21的該陰極與地之間。該穩壓晶片23具有一電連接該二極體21的該陰極的第一端、一第二端，及一第三端。該第一電阻24具有一電連接該穩壓晶片23之該第二端的第一端，及一電連接該穩壓晶片23之該第三端的第二端。該第二電阻25電連接在該第一電阻24的該等第一及第二端之間。該第二電容26電連接在該第一電阻24的該第二端與地之間。該第三電阻27具有一電連接該第一電阻24的該第二端的第一端，及一提供該定電流Io的第二端。在本實施例中，該穩壓晶片23是一型號為LM317的穩壓晶片。該穩壓晶片23的規格及連接方式可參閱此型號的數據手冊(datasheet)，故於此不贅述。The diode 21 has an anode electrically connected to the input terminal Q1 to receive the input voltage Vi, and a cathode. The first capacitor 22 is electrically connected between the cathode of the diode 21 and the ground. The voltage stabilizing chip 23 has a first end electrically connected to the cathode of the diode 21, a second end, and a third end. The first resistor 24 has a first end electrically connected to the second end of the voltage stabilizing chip 23 and a second end electrically connected to the third end of the stabilizing chip 23. The second resistor 25 is electrically connected between the first and second ends of the first resistor 24. The second capacitor 26 is electrically connected between the second end of the first resistor 24 and the ground. The third resistor 27 has a first end electrically connected to the second end of the first resistor 24, and a second end that provides the constant current Io. In this embodiment, the voltage stabilizer chip 23 is a voltage stabilizer chip LM317. The specifications and connection methods of the voltage regulator chip 23 can be found in the datasheet of this model, so it will not be repeated here.

該二個電壓偵測電路3分別與該二個燈具10並聯連接，且分別偵測該二個燈具10的跨壓，以分別產生二個偵測電壓Vd1、Vd2。The two voltage detection circuits 3 are respectively connected to the two lamps 10 in parallel, and respectively detect the cross voltage of the two lamps 10 to generate two detection voltages Vd1 and Vd2 respectively.

該控制電路4電連接該二個電壓偵測電路3以接收該二個偵測電壓Vd1、Vd2，且根據該二個偵測電壓Vd1、Vd2及一預定電壓值判斷是否有燈具故障並產生一控制信號Cs。在本實施例中，該控制電路4包括有一型號為PIC12F1501的控制晶片(圖未示)及其它必要元件(圖未示)。該控制晶片的規格及連接方式可參閱此型號的數據手冊(datasheet)，故於此不贅述。The control circuit 4 is electrically connected to the two voltage detection circuits 3 to receive the two detection voltages Vd1, Vd2, and based on the two detection voltages Vd1, Vd2 and a predetermined voltage value, it determines whether there is a lamp failure and generates a Control signal Cs. In this embodiment, the control circuit 4 includes a control chip (not shown) with a model of PIC12F1501 and other necessary components (not shown). The specification and connection method of the control chip can be found in the datasheet of this model, so I will not repeat it here.

該電源供應電路5電連接在該輸入端Q1與該控制電路4之間，接收來自該輸入端Q1之該輸入電壓Vi，並根據該輸入電壓Vi產生一電源Ps予該控制電路4。The power supply circuit 5 is electrically connected between the input terminal Q1 and the control circuit 4, receives the input voltage Vi from the input terminal Q1, and generates a power supply Ps to the control circuit 4 according to the input voltage Vi.

該負載電路6具有一電連接該輸入端Q1以接收該輸入電壓Vi的第一端，及一第二端。The load circuit 6 has a first terminal electrically connected to the input terminal Q1 to receive the input voltage Vi, and a second terminal.

該開關電路7電連接該負載電路6的該第二端、該控制電路4及地，接收來自該控制電路4的該控制信號Cs，並根據該控制信號Cs而導通或不導通。當該開關電路7導通時，一相關於該輸入電壓Vi的輸入電流Ii經由該負載電路6與該開關電路7流入地。The switch circuit 7 is electrically connected to the second end of the load circuit 6, the control circuit 4 and the ground, receives the control signal Cs from the control circuit 4, and is turned on or off according to the control signal Cs. When the switch circuit 7 is turned on, an input current Ii related to the input voltage Vi flows into the ground through the load circuit 6 and the switch circuit 7.

該行車電腦8電連接該輸入端Q1，並偵測來自該輸入端Q1的一總輸入電流是否小於一預定電流值。The trip computer 8 is electrically connected to the input terminal Q1, and detects whether a total input current from the input terminal Q1 is less than a predetermined current value.

詳細來說，操作時，該控制電路4判斷該二個偵測電壓Vd1、Vd2中的至少一者的電壓值是否小於該預定電壓值。當判斷結果為否時，表示沒有燈具發生故障，該控制電路4所產生之該控制信號Cs持續使該開關電路7導通，以致該輸入電流Ii經由該負載電路6與該開關電路7流入地。此時，該行車電腦8偵測到該總輸入電流(包括該輸入電流Ii及該定電流Io)大於該預定電流值，該行車電腦8無須發出一用於指示有燈具發生故障的警示信號As以利監控。當判斷結果為是時(即，判斷出該二個偵測電壓Vd1、Vd2中的至少一者的電壓值小於該預定電壓值)，表示該控制電路4判斷出有燈具發生故障，並調整其所產生之該控制信號Cs，使得該開關電路7根據該控制信號Cs而不導通，以致沒有電流經由該負載電路6與該開關電路7流入地。此時，該行車電腦8偵測到該總輸入電流(僅包括該定電流Io)小於該預定電流值，並發出該用於指示有燈具發生故障的警示信號As以利監控。需說明的是，在此實施例中，該行車電腦8是將該警示信號As傳送至一車用儀表板(圖未示)的一警示燈(圖未示)，以致該警示燈根據該警示信號As而快閃，以通知使用者有燈具發生故障，但不限於此。In detail, during operation, the control circuit 4 determines whether the voltage value of at least one of the two detection voltages Vd1 and Vd2 is less than the predetermined voltage value. When the judgment result is negative, it means that no lamp has malfunctioned, and the control signal Cs generated by the control circuit 4 continues to turn on the switch circuit 7 so that the input current Ii flows into the ground through the load circuit 6 and the switch circuit 7. At this time, the trip computer 8 detects that the total input current (including the input current Ii and the constant current Io) is greater than the predetermined current value, and the trip computer 8 does not need to send out a warning signal As for indicating that a lamp has failed. To facilitate monitoring. When the judgment result is yes (that is, it is judged that the voltage value of at least one of the two detection voltages Vd1 and Vd2 is less than the predetermined voltage value), it means that the control circuit 4 judges that a lamp is malfunctioning and adjusts it. The generated control signal Cs makes the switch circuit 7 non-conductive according to the control signal Cs, so that no current flows into the ground through the load circuit 6 and the switch circuit 7. At this time, the trip computer 8 detects that the total input current (only the constant current Io) is less than the predetermined current value, and sends out the warning signal As for indicating that a lamp has malfunctioned to facilitate monitoring. It should be noted that in this embodiment, the trip computer 8 transmits the warning signal As to a warning light (not shown) on a vehicle dashboard (not shown), so that the warning light is based on the warning The signal As flashes quickly to notify the user that the lamp is malfunctioning, but it is not limited to this.

綜上所述，本發明燈具故障偵測裝置之該控制電路4利用該二個電壓偵測電路3所產生的該二個偵測電壓Vd1、Vd2進行燈具故障偵測判斷，並於該二個偵測電壓Vd1、Vd2中的至少一者的電壓值小於該預定電壓值即可判斷出有燈具發生故障。如此，可提升本發明燈具故障偵測裝置的偵測靈敏度。此外，該控制電路4判斷出有燈具發生故障時會對應調整該控制信號Cs使該開關電路7不導通，以致該行車電腦8發出該警示信號As以利監控，進而可快速提醒使用者進行燈具維修，以提升行車安全等特點。In summary, the control circuit 4 of the lamp failure detection device of the present invention uses the two detection voltages Vd1 and Vd2 generated by the two voltage detection circuits 3 to perform lamp failure detection and judgment, and perform lamp failure detection and judgment on the two voltage detection circuits. By detecting that the voltage value of at least one of the detected voltages Vd1 and Vd2 is less than the predetermined voltage value, it can be determined that the lamp is malfunctioning. In this way, the detection sensitivity of the lamp failure detection device of the present invention can be improved. In addition, when the control circuit 4 determines that there is a lamp failure, it will adjust the control signal Cs to make the switch circuit 7 non-conducting, so that the trip computer 8 sends out the warning signal As to facilitate monitoring, and can quickly remind the user to perform the lamp Maintenance to improve driving safety and other features.

惟以上所述者，僅為本發明之實施例而已，當不能以此限定本發明實施之範圍，凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

10:燈具 1:突波保護元件 11:瞬態電壓抑制二極體 2:定電流產生電路 21:二極體 22、26:第一及第二電容 23:穩壓晶片 24、25:第一及第二電阻 27:第三電阻 3:電壓偵測電路 4:控制電路 5:電源供應電路 6:負載電路 7:開關電路 8:行車電腦 As:警示信號 Cs:控制信號 Ii:輸入電流 Io:定電流 Ps:電源 Q1:輸入端 Vi:輸入電壓 Vd1:偵測電壓 Vd2:偵測電壓 10: lamps 1: Surge protection component 11: Transient voltage suppression diode 2: Constant current generating circuit 21: Diode 22, 26: the first and second capacitors 23: voltage regulator chip 24, 25: first and second resistors 27: third resistor 3: Voltage detection circuit 4: Control circuit 5: Power supply circuit 6: Load circuit 7: Switch circuit 8: Trip computer As: warning signal Cs: control signal Ii: input current Io: constant current Ps: Power Q1: Input terminal Vi: input voltage Vd1: Detection voltage Vd2: Detection voltage

本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中： 圖1是一電路方塊圖，說明本發明燈具故障偵測裝置之一實施例；及 圖2是一電路方塊圖，說明該實施例之一定電流產生電路。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a circuit block diagram illustrating an embodiment of the lamp failure detection device of the present invention; and Fig. 2 is a circuit block diagram illustrating the certain current generating circuit of this embodiment.

10:燈具 10: lamps

1:突波保護元件 1: Surge protection component

11:瞬態電壓抑制二極體 11: Transient voltage suppression diode

2:定電流產生電路 2: Constant current generating circuit

3:電壓偵測電路 3: Voltage detection circuit

4:控制電路 4: Control circuit

5:電源供應電路 5: Power supply circuit

6:負載電路 6: Load circuit

7:開關電路 7: Switch circuit

8:行車電腦 8: Trip computer

As:警示信號 As: warning signal

Cs:控制信號 Cs: control signal

Ii:輸入電流 Ii: input current

Io:定電流 Io: constant current

Ps:電源 Ps: Power

Q1:輸入端 Q1: Input terminal

Vi:輸入電壓 Vi: input voltage

Vd1:偵測電壓 Vd1: Detection voltage

Vd2:偵測電壓 Vd2: Detection voltage

Claims (7)

一種燈具故障偵測裝置，適用於偵測N個燈具，N≧1，N為正整數，該燈具故障偵測裝置包含：一輸入端，用於接收一輸入電壓；一定電流產生電路，電連接在該輸入端與該N個燈具之間，接收來自該輸入端之該輸入電壓，並根據該輸入電壓產生一定電流以驅動該N個燈具；N個電壓偵測電路，分別與該N個燈具並聯連接，且分別偵測該N個燈具的跨壓，以分別產生N個偵測電壓；一控制電路，電連接該N個電壓偵測電路以接收該N個偵測電壓，且根據該N個偵測電壓及一預定電壓值判斷是否有燈具故障並產生一控制信號；一負載電路，具有一電連接該輸入端以接收該輸入電壓的第一端，及一第二端；及一開關電路，電連接該負載電路的該第二端、該控制電路及地，接收來自該控制電路的該控制信號，並根據該控制信號而導通或不導通，當該開關電路導通時，一相關於該輸入電壓的輸入電流經由該負載電路與該開關電路流入地；當該N個偵測電壓中的至少一者的電壓值小於該預定電壓值時，該控制電路判斷出有燈具發生故障，並調整及產生該控制信號，以致該開關電路根據該控制信號而不導通。 A lamp failure detection device, suitable for detecting N lamps, N≧1, N is a positive integer, the lamp failure detection device includes: an input terminal for receiving an input voltage; a certain current generation circuit, electrical connection Between the input terminal and the N lamps, the input voltage from the input terminal is received, and a certain current is generated according to the input voltage to drive the N lamps; N voltage detection circuits are connected to the N lamps respectively Are connected in parallel, and respectively detect the cross voltage of the N lamps to generate N detection voltages respectively; a control circuit is electrically connected to the N voltage detection circuits to receive the N detection voltages, and according to the N A detection voltage and a predetermined voltage value determine whether there is a lamp failure and generate a control signal; a load circuit having a first terminal electrically connected to the input terminal to receive the input voltage, and a second terminal; and a switch The circuit is electrically connected to the second end of the load circuit, the control circuit and the ground, receives the control signal from the control circuit, and is turned on or off according to the control signal. When the switch circuit is turned on, a related The input current of the input voltage flows into the ground through the load circuit and the switch circuit; when the voltage value of at least one of the N detection voltages is less than the predetermined voltage value, the control circuit determines that a lamp is malfunctioning, and Adjusting and generating the control signal so that the switch circuit is not turned on according to the control signal. 如請求項1所述的燈具故障偵測裝置，還包含一行車電腦，電連接該輸入端，並偵測來自該輸入端的一總輸入電流是否小於一預定電流值，當該開關電路不導通時，該行車電腦偵測到該總輸入電流小於該預定電流值，並發出一警示信號以利監控。 The lamp failure detection device according to claim 1, further comprising a row-car computer, electrically connected to the input terminal, and detecting whether a total input current from the input terminal is less than a predetermined current value, when the switch circuit is not conducting , The trip computer detects that the total input current is less than the predetermined current value, and sends out a warning signal to facilitate monitoring. 如請求項1所述的燈具故障偵測裝置，還包含一突波保護元件，電連接在該輸入端與地之間。 The lamp failure detection device according to claim 1, further comprising a surge protection element electrically connected between the input terminal and the ground. 如請求項3所述的燈具故障偵測裝置，其中，該突波保護元件包括一瞬態電壓抑制二極體，電連接在該輸入端與地之間。 The lamp fault detection device according to claim 3, wherein the surge protection element includes a transient voltage suppression diode electrically connected between the input terminal and the ground. 如請求項1所述的燈具故障偵測裝置，還包含一電源供應電路，電連接在該輸入端與該控制電路之間，接收來自該輸入端之該輸入電壓，並根據該輸入電壓產生一電源予該控制電路。 The lamp failure detection device according to claim 1, further comprising a power supply circuit, which is electrically connected between the input terminal and the control circuit, receives the input voltage from the input terminal, and generates a power supply circuit according to the input voltage Power to the control circuit. 如請求項1所述的燈具故障偵測裝置，其中，該定電流產生電路包括一二極體，具有一電連接該輸入端以接收該輸入電壓的陽極，及一陰極，一第一電容，電連接在該二極體的該陰極與地之間，一穩壓晶片，具有一電連接該二極體的該陰極的第一端、一第二端，及一第三端，一第一電阻，具有一電連接該穩壓晶片之該第二端的第一端，及一電連接該穩壓晶片之該第三端的第二端， 一第二電阻，電連接在該第一電阻的該等第一及第二端之間，一第二電容，電連接在該第一電阻的該第二端與地之間，及一第三電阻，具有一電連接該第一電阻的該第二端的第一端，及一提供該定電流的第二端。 The lamp failure detection device according to claim 1, wherein the constant current generating circuit includes a diode having an anode electrically connected to the input terminal to receive the input voltage, a cathode, and a first capacitor, Electrically connected between the cathode of the diode and the ground, a voltage-stabilizing chip has a first end electrically connected to the cathode of the diode, a second end, and a third end, a first The resistor has a first end electrically connected to the second end of the voltage stabilizing chip, and a second end electrically connected to the third end of the voltage stabilizing chip, A second resistor is electrically connected between the first and second ends of the first resistor, a second capacitor is electrically connected between the second end of the first resistor and ground, and a third The resistor has a first end electrically connected to the second end of the first resistor, and a second end that provides the constant current. 如請求項6所述的燈具故障偵測裝置，其中，該穩壓晶片是一型號為LM317的穩壓晶片。 The lamp failure detection device according to claim 6, wherein the voltage stabilizing chip is a voltage stabilizing chip of LM317.
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