Illuminating device

Abstract

A illuminating device comprising: a first light tube device configured to illuminate according to a voltage level of a first node; a first driver coupled to the first node, configured to provide power to the first light tube device; a first feedback circuit configured to measure a first node signal of the first node, and generating a first feedback signal according to the first node signal; and a controller configured to determine whether the first light tube device is malfunction according to the first feedback signal.

Description

[Technical Field]

[0001] This disclosure relates to a light-emitting device, and more particularly to a light-emitting device having a feedback circuit. [Previous Technology]

[0002] In current lighting devices, the power driver is typically used to provide current and voltage to start or stop the lamps. However, most lighting devices used in industrial plants have a large number of lamps. In this case, existing technology cannot integrate individual lamps into an automated control system for such a large number of lamp configurations. Therefore, further design and improvement of the driver circuitry are needed to address the lamp configuration in lighting devices, the monitoring of individual lamps, and troubleshooting. [Summary of the Invention]

[0003] This disclosure includes a light-emitting device, comprising a first lamp device for emitting light according to the voltage level of a first node; a first driver coupled to the first node and used to supply power to the first lamp device; a first feedback circuit for measuring a first node signal of the first node and generating a first feedback signal based on the first node signal; and a controller for determining whether the first lamp device has malfunctioned based on the first feedback signal.

[0004] This disclosure includes a light-emitting device comprising a plurality of lamp devices, each used to emit light according to a voltage level of a node; a plurality of drivers, each coupled to a node and used to power the lamp devices; a plurality of feedback circuits, each coupled to a lamp device, the feedback circuits comprising: a plurality of switches, each used to measure a node signal and generate a feedback signal based on the node signal; and a controller, used to determine whether a lamp device has malfunctioned based on the feedback signal, wherein when a first node signal of the node signal has a first voltage level, the controller determines that the first lamp of the plurality of lamp devices has malfunctioned, and when the node signal has a second voltage level, the controller determines that the plurality of lamp devices are operating normally, and wherein the first voltage level is greater than the second voltage level.

Implementation Method

[0005] The following disclosure provides numerous different embodiments or examples for implementing various features of the provided subject matter. Specific examples of components and configurations are described below to simplify this disclosure. Of course, these components and configurations are merely examples and are not intended to be limiting. For example, in the following description, forming a first feature on or on a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which an additional feature may be formed between the first and second features so that the first and second features are not in direct contact. Additionally, reference numerals and / or letters may be repeated in various instances of this disclosure. This repetition is for simplicity and clarity and does not in itself determine the relationship between the various embodiments and / or configurations discussed.

[0006] Additionally, for ease of description, spatial relative terms such as "below," "under," "lower," "above," "upper," "top," "bottom," and similar terms may be used herein to describe the relationship between one element or feature illustrated in the figures and one or more other elements or features. Besides the orientation depicted in the figures, the spatial relative terms are intended to cover different orientations of elements in use or operation. Devices may be oriented in other ways (rotated 90 degrees or otherwise), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0007] Figure 1 is a schematic diagram of a light-emitting device 100 according to some embodiments of the present disclosure. As shown in Figure 1, the light-emitting device 100 includes a feedback circuit 101, a driver 110, a lamp assembly 120, and a controller 130.

[0008] In some embodiments, the driver 110 is coupled to each of the lamp assembly 120 and the feedback circuit 101. The feedback circuit 101 is coupled to the lamp assembly 120. The feedback circuit 101 is further coupled to the controller 130 for transmitting signals to each other.

[0009] In some embodiments, the driver 110 provides an input voltage VDD and an input current I to the lamp device 120 to power the lamp device 120. The feedback circuit 101 receives the node signal VA generated by the driver 110 and the lamp device 120. The feedback circuit 101 further generates a feedback signal V_FAULT based on the node signal VA and transmits the feedback signal V_FAULT to the controller 130. The controller 130 determines whether the lamp device 120 has malfunctioned based on the feedback signal V_FAULT. The specific generation methods of the node signal VA and the feedback signal V_FAULT, as well as the operational details of the feedback circuit 101, will be described in detail in Figures 2A and 3 and the corresponding paragraphs.

[0010] In some embodiments, the driver 110 may be used to convert a higher voltage level AC voltage (e.g., 120 volts) in a socket power supply to a lower voltage level DC voltage (e.g., 3.5 volts or 7 volts), but this disclosure is not limited to this voltage conversion form.

[0011] In some embodiments, the controller 130 may be implemented by a programmable logic controller (PLC), but this disclosure is not limited to this type of controller.

[0012] In some embodiments, the lamp device 120 may be composed of a plurality of lamps. The plurality of lamps may be light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), active matrix organic light-emitting diodes (AMOLEDs) or similar light-emitting elements, but the present disclosure is not limited thereto.

[0013] In some implementations, a driver used in a light-emitting device can provide sufficient current and voltage to make the diode lamps in the device emit light. However, in light-emitting devices consisting of a large number of lamps, when one or more lamps fail, the faulty lamp cannot be detected and identified in a timely manner due to the lack of a feedback mechanism. In some technologies, this problem can be solved by applying an automated control system to a device consisting of multiple lamps. Although the automated control system can control each lamp individually in the light-emitting device, this method is practically limited by the number of lamps. For light-emitting devices with a large number of lamps, the automated control system still cannot solve the problem of detecting the faulty lamp among multiple lamps.

[0014] In the embodiments disclosed herein, the light-emitting device 100 can be connected to the lamp device 120 via a feedback circuit 101. The feedback circuit 101 can generate a feedback signal V_FAULT based on the node signal VA in the lamp device 120, and transmit the feedback signal V_FAULT to the controller 130 to determine whether a lamp in the lamp device 120 has malfunctioned. Therefore, the light-emitting device 100 can effectively detect malfunctioning lamps by using the feedback circuit 101. In a light-emitting device 100 consisting of multiple lamps, the above-mentioned effect can be achieved by connecting multiple feedback circuits 101 to multiple lamp devices 120 respectively. The application of multiple lamps will be illustrated in Figure 4 and the corresponding paragraph.

[0015] Figure 2A is a circuit diagram illustrating a light-emitting device 200 according to some embodiments of the present disclosure. In some embodiments, the light-emitting device 200 is a configuration of the light-emitting device 100 in Figure 1; however, the present disclosure is not limited to this configuration. As shown in Figure 2A, the light-emitting device 200 includes the elements of the light-emitting device 100, wherein the feedback circuit 101 includes a switch 201, resistors R1 and R2.

[0016] In some embodiments, switch 201 may be implemented using a metal oxide semiconductor field-effect transistor (MOSFET), but this disclosure is not limited to this type of transistor. In the embodiments disclosed herein, switch 201 may be implemented using an N-type MOSFET.

[0017] In some embodiments, one end of resistor R1 is coupled to each of driver 110 and lamp assembly 120 at node N1. The other end of resistor R1 is coupled to one end of resistor R2 at node N2. The other end of resistor R2 is used to receive a reference voltage GND, wherein the reference voltage GND has a ground voltage level. The gate terminal of switch 201 is coupled to resistors R1 and R2 at node N2. The source terminal of switch 201 is used to receive input voltage VIN, and the drain terminal of switch 201 is coupled to controller 130 to transmit feedback signal V_FAULT.

[0018] In some embodiments, when the light-emitting device 100 is operating normally, the driver 110 provides an input voltage VDD and an input current I to power the lamp device 120 and generates a node signal VA at node N1. At this time, the switch 201 is turned off and the feedback circuit 101 is disabled.

[0019] In other embodiments, when the lamp assembly 120 malfunctions, such as an open circuit, the resistance value of the equivalent resistance RL of the lamp assembly 120 rises to a value greater than the resistance values ​​of resistors R1 and R2. In response to the equivalent resistance RL being greater than the resistance values ​​of resistors R1 and R2, the voltage level of the node signal VA of node N1 rises. In response to the rise in the voltage level of the node signal VA, switch 201 is turned on to enable the feedback circuit 101, causing the input voltage VIN to be input from the source terminal of switch 201 and generating a voltage signal V_FAULT at the drain terminal of switch 201. Controller 130 receives the voltage signal V_FAULT and determines whether the lamp assembly 120 has malfunctioned based on the voltage signal V_FAULT.

[0020] In some embodiments, when the number of lamps in the lamp assembly 120 increases, the resistance value of the equivalent resistance RL increases. When the number of lamps in the lamp assembly 120 decreases, the resistance value of the equivalent resistance RL decreases.

[0021] In some embodiments, the lamp device 120 has an equivalent resistance RL inside, and the resistance value of the equivalent resistance RL is less than the resistance values ​​of the resistors R1 and R2 in the feedback circuit 101.

[0022] In some embodiments, the equivalent resistance RL may have a resistance value of 3.3 ohms or 6.6 ohms, but this disclosure is not limited to this resistance value.

[0023] In some embodiments, resistor R1 may have a resistance value of 22 kΩ and resistor R2 may have a resistance value of 100 kΩ, but the present disclosure is not limited to these resistance values.

[0024] In some embodiments, when the light-emitting device 100 is operating normally, the node signal VA has a voltage level VL. When the light-emitting device 100 malfunctions, the node signal VA has a voltage level VH. In some embodiments, the voltage level VH is greater than the voltage level VL.

[0025] In some embodiments, when the lamp device 120 is operating normally, the lamp device 120 can emit light normally, and the lamp device 120 operates within a preset operating temperature range. In some embodiments, when the lamp device 120 malfunctions, the lamp device 120 cannot emit light normally. At this time, the lamp device 120 is open-circuited, or the lamp device 120 is operating at a temperature exceeding the aforementioned preset operating temperature range.

[0026] Figure 2B is a circuit diagram illustrating a lamp tube device 120 according to some embodiments of the present disclosure. In some embodiments, Figure 2B shows one embodiment of the lamp tube device 120 in the light-emitting device 200. As shown in Figure 2B, the lamp tube device 120 includes a plurality of lamps L_A1 to L_A8.

[0027] In some embodiments, the anode of lamp L_A1 is coupled to the cathode of lamp L_A2. The anode of lamp L_A2 is coupled to the cathode of lamp L_A3. The anode of lamp L_A3 is coupled to the cathode of lamp L_A4. The anode of lamp L_A4 is coupled to the cathode of lamp L_A5. The anode of lamp L_A5 is coupled to the cathode of lamp L_A6. The anode of lamp L_A6 is coupled to the cathode of lamp L_A7. The anode of lamp L_A7 is coupled to the cathode of lamp L_A8. The anode of lamp L_A8 is coupled to node N1 to receive the input voltage VDD and generate the node voltage VA. The cathode of lamp L_A1 is used to receive a reference voltage VSS, wherein the reference voltage VSS has a ground voltage level.

[0028] In some embodiments, the lamp device 120 can be used to emit ultraviolet light (UVA) with a wavelength of 320-400 micrometers. In the embodiment of Figure 2B, the lamp device 120 has eight lamps; however, this disclosure is not limited to this number of lamps.

[0029] Figure 2C is a circuit diagram illustrating a lamp holder 120 according to some embodiments of the present disclosure. In some embodiments, Figure 2C shows another embodiment of the lamp holder 120 in the light-emitting device 200. As shown in Figure 2C, the lamp holder 120 includes a plurality of lamps L_B1 to L_B5.

[0030] In some embodiments, the anode of lamp L_B1 is coupled to the cathode of lamp L_B2. The anode of lamp L_B2 is coupled to the cathode of lamp L_B3. The anode of lamp L_B3 is coupled to the cathode of lamp L_B4. The anode of lamp L_B4 is coupled to the cathode of lamp L_B5. The anode of lamp L_B5 is coupled to node N1 to receive the input voltage VDD and generate the node voltage VA. The cathode of lamp L_B1 is used to receive a reference voltage VSS, wherein the reference voltage VSS has a ground voltage level.

[0031] In some embodiments, the lamp device 120 having five lamps L_B1 to L_B5 can be used to emit ultraviolet light (UVB) with a wavelength of 290 to 320 micrometers. In the embodiment of Figure 2C, the lamp device 120 has five lamps; however, this disclosure is not limited to this number of lamps.

[0032] In some embodiments, the lamp device 120 with eight lamps can be used to emit UVA ultraviolet light, and the wavelength is greater than that of the lamp device 120 with five lamps to increase the penetrating power of the light. For example, the lamp device 120 with eight lamps can be used for mineral identification and stage decoration, but the present disclosure is not limited thereto.

[0033] In some embodiments, the lamp device 120 with five lamps can be used to emit UVB ultraviolet light, and the wavelength is smaller than that of the lamp device 120 with eight lamps to increase the energy of the light emission. For example, the lamp device 120 with five lamps can be used for lighting plant growth or for sterilization and mold removal.

[0034] Figure 3 is a timing waveform diagram of the light-emitting device 100 according to some embodiments of the present disclosure. Referring also to Figure 3, Figure 2A and Figure 1, Figure 3 illustrates the change of the node signal VA with respect to time of the light-emitting device 100 during the period from time T0 to T2. In some embodiments, Figure 3 also illustrates the change of the node signal VA with respect to time when the light-emitting device 200 is operating.

[0035] At time T0, the lamp device 120 is operating normally. At this time, the node signal VA has a voltage level VL, and the feedback circuit 101 is deactivated.

[0036] During the period between time T0 and T1, the lamp assembly 120 maintains normal operation. At this time, the node signal VA maintains a voltage level VL. When the lamp assembly 120 maintains normal operation, the resistance value of the equivalent resistor RL is less than the resistance value of the resistor R1. The input current I flows from the driver 110 through node N1 to the lamp assembly 120 to supply power to the lamp assembly 120. In response to the fact that the resistance value of the equivalent resistor RL is less than the resistance value of the resistor R1, the switch 201 remains off and the feedback circuit 101 remains disabled.

[0037] In some embodiments, when the feedback circuit 101 is deactivated, the feedback signal V_FAULT has a logic low voltage level. In some embodiments, the logic low voltage level may have a 0-volt voltage level.

[0038] At time T1, the node signal VA switches from voltage level VL to voltage level VH, and the controller 130 determines that the lamp device 120 has malfunctioned.

[0039] Specifically, when the node signal VA measured at node N1 has a voltage level VH, the resistance value of the equivalent resistance RL is greater than the resistance value of the resistor R1. At this time, in response to the equivalent resistance RL being greater than the resistance value of the resistor R1, the input current I flows from the driver 110 through node N1, through resistor R1 to node N2, and from node N2 to the gate terminal of switch 201. In response to the input current I flowing to the gate terminal of switch 201, switch 201 is turned on and the feedback circuit 101 is enabled.

[0040] In some embodiments, when the feedback circuit 101 is enabled, the input voltage VIN is supplied from the source terminal of the switch 201 and a feedback signal V_FAULT is generated at the drain terminal of the switch 201 to be transmitted to the controller 130. When the controller 130 receives the feedback signal V_FAULT, the controller 130 determines that the lamp device 120 has malfunctioned.

[0041] During the period between time T1 and T2, the lamp device 120 remains faulty, and the node signal VA continues to have a voltage level VH.

[0042] In some embodiments, when the lamp assembly 120 fails, the node signal VA of node N1 may have a voltage level of 19 volts, but this disclosure is not limited thereto.

[0043] In some embodiments, when the feedback circuit 101 is enabled, the feedback signal V_FAULT has a logic high voltage level. In some embodiments, the logic high voltage level may have the same voltage level as the input voltage VIN.

[0044] In some embodiments, when the lamp device 120 resumes normal operation, the node signal VA switches from voltage level VH to voltage level VL. At this time, the feedback circuit 101 is deactivated, and the driver 110 is used to provide input voltage VDD and input current I to the lamp device 120 to power the lamp device 120.

[0045] Figure 4 is a circuit diagram of a light-emitting device 400 according to some embodiments of the present disclosure. In some embodiments, the light-emitting device 400 is another embodiment of the light-emitting device 200 of Figure 2A, and the light-emitting device 400 has three sets of lamp devices 120, 421, and 422 identical to the lamp devices 120 of the light-emitting device 200. As shown in Figure 4, the light-emitting device 400 includes all the elements of the light-emitting device 100, and the light-emitting device 400 further includes feedback circuits 401 and 402, drivers 411 and 412, lamp devices 421 and 422, switches 431 and 432, and a controller 430.

[0046] In some embodiments, each of switches 201, 431, and 432 may be implemented using a metal-oxide-semiconductor field-effect transistor (MOSFET), but this disclosure is not limited to this type of transistor. In the embodiments disclosed herein, each of switches 201, 431, and 432 may be implemented using an N-type MOSFET.

[0047] In some embodiments, one end of resistor R1 is coupled to each of driver 110 and lamp assembly 120 at node N1. The other end of resistor R1 is coupled to one end of resistor R2 at node N2. The other end of resistor R2 is used to receive reference voltage GND. The gate terminal of switch 201 is coupled to resistors R1 and R2 at node N2. The source terminal of switch 201 is used to receive input voltage VIN, and the drain terminal of switch 201 is coupled to controller 430 to transmit feedback signal V_FAULT.

[0048] In some embodiments, one end of resistor R3 is coupled to each of driver 411 and lamp assembly 421 at node N3. The other end of resistor R3 is coupled to one end of resistor R4 at node N4. The other end of resistor R4 is used to receive reference voltage GND. The gate terminal of switch 431 is coupled to resistors R3 and R4 at node N4. The source terminal of switch 431 is used to receive input voltage VIN, and the drain terminal of switch 431 is coupled to controller 430 to transmit feedback signal V_FB.

[0049] In some embodiments, one end of resistor R5 is coupled to each of driver 412 and lamp assembly 422 at node N5. The other end of resistor R5 is coupled to one end of resistor R6 at node N6. The other end of resistor R6 is used to receive reference voltage GND. The gate terminal of switch 432 is coupled to resistors R5 and R6 at node N6. The source terminal of switch 432 is used to receive input voltage VIN, and the drain terminal of switch 432 is coupled to controller 430 to transmit feedback signal V_FC.

[0050] In some embodiments, the operation of the light-emitting device 400 is similar to that of the light-emitting device 100 in Figure 1. For the sake of brevity, the similarities between the light-emitting device 400 and 100 will not be repeated.

[0051] In some embodiments, when the light-emitting device 400 is operating normally, drivers 110, 411, and 412 are respectively used to generate input voltage VDD and input current I, and respectively power lamp devices 120, 421, and 422. In response to drivers 110, 411, and 412 powering lamp devices 120, 421, and 422, nodes N1, N3, and N5 generate node signals VA, VB, and VC, respectively. At this time, each of switches 201, 431, and 432 is turned off, and each of feedback circuits 101, 401, and 402 is deactivated.

[0052] In other embodiments, when any or more of the lamp assemblies 120, 421, and 422 fail, the voltage levels of the corresponding node signals VA, VB, and VC rise to activate the corresponding feedback circuits 101, 401, and / or 402. The controller 430 receives feedback signals V_FAULT, V_FB, and V_FC, and determines whether the lamp assemblies 120, 421, and 422 have failed based on the feedback signals V_FAULT, V_FB, and V_FC. Operational details of the feedback circuits 101, 401, and 402 will be described in detail in Figure 5 and the corresponding paragraphs.

[0053] In some embodiments, the lamp tube devices 421 and 422 respectively have equivalent resistors RL2 and RL3. The resistance value of the equivalent resistor RL2 is less than the resistance value of each of resistors R3 and R4, and the resistance value of the equivalent resistor RL3 is less than the resistance value of each of resistors R5 and R6.

[0054] In some embodiments, each of the equivalent resistors RL2 and RL3 may have a resistance value of 3.3 ohms or 6.6 ohms, but this disclosure is not limited to this resistance value.

[0055] In some embodiments, resistors R3 and R5 may have a resistance value of 22 kΩ, and resistors R4 and R6 may have a resistance value of 100 kΩ, but this disclosure is not limited to these resistance values.

[0056] In some embodiments, when the light-emitting device 400 is operating normally, each of the node signals VA, VB, and VC has a voltage level VL. When the lamp devices 120, 421, and / or 422 in the light-emitting device 400 malfunctions, the node signals VA, VB, and VC corresponding to the malfunctioning lamp devices 120, 421, and / or 422 have a voltage level VH.

[0057] Figure 5 is a timing waveform diagram of a light-emitting device 400 according to some embodiments of the present disclosure. As shown in Figure 5, the timing waveform diagram illustrates the operation of the light-emitting device 400 during the period from time T0 to T3. Referring also to Figures 5 and 4, Figure 5 illustrates the changes of node signals VA, VB, and VC over time.

[0058] At time T0, each of the lamp devices 120, 421 and 422 is operating normally. At this time, each of the node signals VA, VB and VC has a voltage level VL, and each of the feedback circuits 101, 401 and 402 is deactivated.

[0059] During the period between time T0 and T1, each of the lamp devices 120, 421, and 422 maintains normal operation. At this time, each of the node signals VA, VB, and VC maintains a voltage level VL. When the lamp devices 120, 421, and 422 maintain normal operation, the resistance values ​​of the equivalent resistors RL, RL2, and RL3 are respectively less than the resistance values ​​of resistors R1, R3, and R5. Drivers 110, 411, and 412 generate input currents I1, I2, and I3, respectively, and these input currents flow through nodes N1, N3, and N5 to power the lamp devices 120, 421, and 422. In response to the fact that the resistance values ​​of the equivalent resistors RL, RL2, and RL3 are respectively less than the resistance values ​​of resistors R1, R3, and R5, each of the switches 201, 431, and 432 remains off, and each of the feedback circuits 101, 401, and 402 remains disabled.

[0060] In some embodiments, when each of the feedback circuits 101, 401 and 402 is deactivated, each of the feedback signals V_FAULT, V_FB and V_FC has a logic low voltage level.

[0061] At time T1, node signal VA switches from voltage level VL to voltage level VH, and controller 430 determines that lamp device 120 has malfunctioned. Each of node signals VB and VC maintains voltage level VL, and controller 430 determines that lamp devices 421 and 422 are operating normally.

[0062] Specifically, when the node signal VA measured at node N1 has a voltage level VH, the resistance value of the equivalent resistance RL is greater than the resistance value of the resistor R1. At this time, in response to the equivalent resistance RL being greater than the resistance value of the resistor R1, the input current I1 flows from the driver 110 through node N1, through resistor R1 to node N2, and from node N2 to the gate terminal of switch 201. In response to the input current I1 flowing to the gate terminal of switch 201, switch 201 is turned on, and feedback circuit 101 is enabled.

[0063] In some embodiments, when the feedback circuit 101 is enabled, the input voltage VIN is supplied from the source terminal of the switch 201 and a feedback signal V_FAULT is generated at the drain terminal of the switch 201 to be transmitted to the controller 430. When the controller 430 receives the feedback signal V_FAULT, the controller 430 determines that the lamp device 120 has malfunctioned.

[0064] During the period between time T1 and T2, lamp assembly 120 remains faulty, and node signal VA continues to have voltage level VH. Lamp assemblies 421 and 422 remain in normal operation, and node signals VB and VC continue to have voltage level VL.

[0065] At time T2, node signal VC switches from voltage level VL to voltage level VH, and controller 430 determines that lamp device 422 has malfunctioned. Node signal VA maintains voltage level VH, and controller 430 determines that lamp device 120 continues to malfunction. Node signal VB maintains voltage level VL, and controller 430 determines that lamp device 421 continues to operate normally.

[0066] Specifically, when the node signal VC measured at node N5 has a voltage level VH, the resistance value of the equivalent resistor RL2 is greater than the resistance value of resistor R5. In response to the equivalent resistor RL2 being greater than the resistance value of resistor R5, the input current I3 flows from driver 412 through node N5, through resistor R5 to node N6, and from node N6 to the gate terminal of switch 432. In response to the input current I3 flowing to the gate terminal of switch 432, switch 432 is turned on, and feedback circuit 402 is enabled.

[0067] In some embodiments, when the feedback circuit 402 is enabled, the input voltage VIN is supplied from the source terminal of the switch 432, and a feedback signal V_FC is generated at the drain terminal of the switch 432 to be transmitted to the controller 430. When the controller 430 receives the feedback signal V_FC, the controller 430 determines that the lamp device 422 has malfunctioned.

[0068] During the period between time T2 and T3, each of the lamp devices 120 and 422 remains faulty, and each of the node signals VA and VC maintains a voltage level VH. The lamp device 421 remains in normal operation, and the node signal VB maintains a voltage level VL.

[0069] In some embodiments, when feedback circuits 101 and 402 are enabled, the feedback signals V_FAULT and V_FC have logic high voltage levels. In some embodiments, the logic high voltage level may have the same voltage level as the input voltage VIN.

[0070] In some embodiments, when the lamp device 120 resumes normal operation, the node signal VA switches from voltage level VH to voltage level VL. At this time, the feedback circuit 101 is deactivated, and the driver 110 is used to provide input voltage VDD and input current I1 to the lamp device 120 to power the lamp device 120.

[0071] In some embodiments, when the lamp device 422 resumes normal operation, the node signal VC switches from voltage level VH to voltage level VL. At this time, the feedback circuit 402 is deactivated, and the driver 412 is used to provide input voltage VDD and input current I3 to the lamp device 422 to power the lamp device 422.

[0072] Figure 6 is a flowchart illustrating an operation method 600 of a light-emitting device 100 according to some embodiments of the present disclosure. As shown in Figure 6, the operation method 600 includes operations 601 to 605. In some embodiments, the operation method 600 can also be applied to the operation of the light-emitting device 200 of Figure 2A and the light-emitting device 400 of Figure 4.

[0073] In some embodiments, the operation methods of the feedback circuits 401 and 402 in the light-emitting device 400 are similar to those of the feedback circuit 101 in the light-emitting device 200. The operation method 600 will be described below using the light-emitting device 200 as an example.

[0074] In operation 601, driver 110 provides input voltage VDD to lamp assembly 120 to power lamp assembly 120.

[0075] Specifically, driver 110 generates an input voltage VDD to node N1 and an input current I. The input current I flows from node N1 to lamp assembly 120 to supply power to lamp assembly 120. At this time, the resistance value of the equalization resistor RL of lamp assembly 120 is greater than the resistance value of resistor R1. After completing operation 601, light-emitting device 200 performs operation 602.

[0076] In operation 602, the controller 130 determines whether the lamp device 120 is faulty.

[0077] Specifically, the controller 130 determines whether the lamp device has malfunctioned based on the feedback signal V_FAULT. When the controller 130 determines that the lamp device 120 is operating normally, the light-emitting device 200 performs operation 605 after completing operation 602. When the controller 130 determines that the lamp device 120 has malfunctioned, the light-emitting device 200 performs operation 603 after completing operation 602.

[0078] In operation 603, when the controller 130 determines that the lamp device 120 has failed, the feedback circuit 101 is activated, and the node signal VA of node N1 has a voltage level VH.

[0079] Specifically, when the lamp assembly 120 malfunctions, the resistance value of the equalization resistor RL of the lamp assembly 120 is greater than the resistance value of the resistor R1, causing the voltage level of the node signal VA to rise to the voltage level VH. When the node signal VA has the voltage level VH, the switch 201 is turned on to enable the feedback circuit 101. The light-emitting device 200 performs operation 604 after completing operation 603.

[0080] In operation 604, when the feedback circuit 101 is activated, the feedback circuit 101 transmits a feedback signal V_FAULT to the controller 130 through the switch 201. In response to the controller 130 receiving the feedback signal V_FAULT, the controller 130 determines that the lamp device 120 has malfunctioned.

[0081] Specifically, when switch 201 is turned on, feedback circuit 101 is activated. At this time, input voltage VIN is transmitted from the source terminal of switch 201 to the drain terminal of switch 201, and a feedback signal V_FAULT is generated at the drain terminal. The feedback signal V_FAULT is transmitted to controller 130 via switch 201. After the light-emitting device 200 completes operation 604, controller 130 determines that lamp device 120 has malfunctioned and completes operation method 600.

[0082] In operation 605, when the controller 130 determines that the lamp device 120 is operating normally, the feedback circuit 101 is deactivated, and the node signal VA of node N1 has a voltage level VH. At this time, the driver 110 maintains the supply of input voltage VDD to the lamp device 120 to power the lamp 120. After the light-emitting device 200 completes operation 605, the controller 130 determines that the lamp device 120 is operating normally and completes operation method 600.

[0083] The foregoing summarizes the features of several embodiments to enable those skilled in the art to better understand the nature of this disclosure. Those skilled in the art should understand that they can readily use this disclosure as the basis for designing or modifying other processes and structures for implementing the same purpose and / or achieving the advantages of the embodiments described herein. Those skilled in the art should also recognize that such equivalent constructions do not depart from the spirit and scope of this disclosure, and that various changes, substitutions, and modifications can be made herein without departing from the spirit and scope of this disclosure. [Simplified Explanation of the Diagram]

[0084] The nature of this disclosure can be best understood by reading the following detailed description in conjunction with the accompanying drawings. It should be noted that, according to industry standard practice, the various features are not drawn to scale. In fact, for clarity of discussion, the dimensions of the various features may be arbitrarily increased or decreased. Figure 1 is a schematic diagram of a light-emitting device according to some embodiments of this disclosure. Figure 2A is a circuit diagram of a light-emitting device according to some embodiments of this disclosure. Figure 2B is a circuit diagram of a lamp assembly according to some embodiments of this disclosure. Figure 2C is a circuit diagram of a lamp assembly according to some embodiments of this disclosure. Figure 3 is a timing waveform diagram of a light-emitting device according to some embodiments of this disclosure. Figure 4 is a circuit diagram of a light-emitting device according to some embodiments of this disclosure. Figure 5 is a timing waveform diagram of a light-emitting device according to some embodiments of this disclosure. Figure 6 is a flowchart of an operation method of a light-emitting device according to some embodiments of this disclosure. [Biomaterial Storage]

[0086] Domestic storage information (please note in order of storage institution, date, and number): None. International storage information (please note in order of storage country, institution, date, and number): None.

Claims

1. A light-emitting device, comprising: a first lamp assembly for emitting light according to a voltage level of a first node; a first driver coupled to the first node and for supplying power to the first lamp assembly; a first feedback circuit for measuring a first node signal of the first node and generating a first feedback signal based on the first node signal; and a controller for determining whether the first lamp assembly has malfunctioned based on the first feedback signal, wherein the first feedback circuit includes a first switch, a first terminal of the first switch for receiving an input voltage to generate the first feedback signal; a second terminal of the first switch coupled to the controller for transmitting the first feedback signal to the controller; and a gate terminal of the first switch for receiving the first node signal.

2. The light-emitting device as claimed in claim 1, wherein the first feedback circuit is enabled when the first node signal has a first voltage level, and the first feedback circuit is disabled when the first node signal has a second voltage level.

3. The light-emitting device as claimed in claim 2, wherein when the first feedback circuit is enabled, the first feedback circuit transmits the first feedback signal to the controller, and the controller determines that the first lamp device has malfunctioned; and when the first feedback circuit is disabled, the first driver continuously supplies power to the first lamp device, and the controller determines that the first lamp device is operating normally.

4. The light-emitting device as claimed in claim 2, wherein the first voltage level is greater than the second voltage level.

5. The light-emitting device as claimed in claim 2, further comprising: a second lamp assembly for emitting light according to a voltage level of a second node; a second driver coupled to the second node and for supplying power to the second lamp assembly; and a second feedback circuit for measuring a second node signal of the second node and generating a second feedback signal based on the second node signal, wherein, The controller determines whether the second lamp device has malfunctioned based on the second feedback signal.

6. The light-emitting device as claimed in claim 5, wherein when the second node signal has the first voltage level, the second feedback circuit is enabled to transmit the second feedback signal to the controller, and the controller determines that the second lamp device has malfunctioned, and when the second node signal has the second voltage level, the second feedback circuit is disabled, and the second driver continuously supplies power to the second lamp device.

7. The light-emitting device as claimed in claim 5, wherein the first lamp device is used to generate ultraviolet light having a first wavelength, the second lamp device is used to generate ultraviolet light having a second wavelength, and the first wavelength is greater than the second wavelength.

8. A light-emitting device, comprising: a plurality of lamp devices, each configured to emit light according to a voltage level of a plurality of nodes; a plurality of drivers, each coupled to the nodes and configured to supply power to the lamp devices; a plurality of feedback circuits, each coupled to the lamp devices, the feedback circuits comprising: a plurality of switches, each configured to measure a plurality of node signals of the nodes and generate a plurality of feedback signals based on the node signals; and a controller, configured to determine whether the lamp devices have malfunctioned based on the feedback signals, wherein... When a first node signal of the node signals has a first voltage level, the controller determines that a first lamp of the lamp assembly has malfunctioned; when each of the node signals has a second voltage level, the controller determines that the lamp assembly is operating normally, wherein the first voltage level is greater than the second voltage level.

9. The light-emitting device as claimed in claim 8, wherein a first portion of the lamp assembly is used to generate ultraviolet light having a first wavelength, a second portion of the lamp assembly is used to generate ultraviolet light having a second wavelength, and the first wavelength is greater than the second wavelength.

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