TW201813445A - Light source driving apparatus and light source switching apparatus thereof, and lighting apparatus adopting the light source driving apparatus - Google Patents

Abstract

A light source driving apparatus, a light source switching apparatus, and a lighting apparatus are provided. The light source driving apparatus comprises a rectifier circuit, a voltage conversion circuit, a first switching circuit, a second switching circuit, a voltage detecting circuit and a controlling circuit. The rectifier circuit is electrically connected to an input power through a switch. The voltage conversion circuit is electrically connected to an output of the rectifier circuit. The first switching circuit is electrically connected to a first light source and an output of the voltage conversion circuit. The second switching circuit is electrically connected to a second light source and the output of the voltage conversion circuit. The voltage detecting circuit is electrically connected to the output of the voltage conversion circuit. The controlling circuit controls a switching circuit corresponding to a stored setting result to transfer the output of the voltage conversion circuit to a corresponding light source, and determines how many times the switch has been re-switched on according to a voltage variation of a detecting voltage for further determining whether to switch to another light source.

Description

 Light source driving device and light source switching device thereof, and lighting device using light source driving device  

The present invention relates to related art in the field of illumination, and more particularly to a light source driving device and a light source switching device thereof, and a lighting device using the light source driving device.

In modern society, lighting devices play an increasingly important role, and they can be seen anywhere. According to its purpose of use, it can be divided into general lighting, architectural lighting, road lighting, advertising signs, accent lighting, stage lighting, biochemical lighting, medical lighting, plant cultivation lighting, residential lighting and so on.

However, as people's demand for lighting has evolved, people have gradually been unable to satisfy the lighting device with only a single light source. Therefore, how to meet such a demand is an urgent problem to be solved.

It is an object of the present invention to provide a light source driving apparatus that can control the operation of two or more light sources using a single switch.

Another object of the present invention is to provide an illumination device using the above-described light source driving device.

Still another object of the present invention is to provide a light source switching device that can control the operation of two or more light sources using a single switch.

The invention provides a light source driving device, which comprises a rectifying circuit, a voltage converting circuit and a light source switching device. The light source switching device further comprises a first switching circuit, a second switching circuit, a voltage detecting circuit and a control circuit. The rectifier circuit is electrically coupled to the input power source through the switch, and the voltage conversion circuit is electrically coupled to the output of the rectifier circuit. The first switch circuit is electrically coupled to the output of the voltage conversion circuit and the first light source, and the second switch circuit is electrically coupled. The output of the voltage conversion circuit is connected to the second light source, and the voltage detection circuit is electrically coupled to the output of the voltage conversion circuit, and the detection voltage is generated whenever the voltage received by the voltage is greater than zero. The control circuit is electrically coupled to the voltage detecting circuit, the first switching circuit and the second switching circuit for controlling the corresponding switching circuit according to the memory result to provide the output of the voltage converting circuit to the corresponding light source, and is used for The voltage change of the voltage is detected to determine the number of restarts of the switch to determine whether to switch to another switch circuit to provide the output of the voltage conversion circuit to the corresponding light source.

The invention further provides a lighting device comprising a first light source, a second light source and the aforementioned light source driving device.

The invention further provides a light source switching device, which comprises a first switch circuit, a second switch circuit, a voltage detecting circuit and a control circuit in the light source driving device.

The light source driving device of the present invention can illuminate the corresponding light source according to the memory result, and can determine the number of restarts of the switch according to the voltage change of the detected voltage to determine whether to switch to another light source, so the light source driving device of the present invention can A single switch is used to control the operation of more than two light sources.

100‧‧‧Light source drive

101‧‧‧Light source switching device

102‧‧‧Rectifier circuit

104‧‧‧Voltage conversion circuit

106, 108‧‧‧Switch circuit

110‧‧‧Voltage detection circuit

110-1‧‧‧voltage circuit

110-2, 110-3, 110-7‧‧‧ impedance

110-4‧‧‧Operational Amplifier

110-5‧‧‧First transistor

110-6‧‧‧Second transistor

112‧‧‧Control circuit

114‧‧‧Operating power supply circuit

120‧‧‧ switch

130, 140‧‧‧ light source

Vin‧‧‧Input power supply

CS1, CS2‧‧‧ control signals

DV‧‧‧Detection voltage

VCC, VDD‧‧‧ operating power supply

VSS, Vref‧‧‧ reference potential

V1‧‧‧ output of rectifier circuit

V2‧‧‧ output of voltage conversion circuit

t‧‧‧Time

P‧‧‧Preset time

S702~S710‧‧‧Steps

1 is a circuit block diagram of a light source driving device according to an embodiment of the present invention; FIG. 2 is one implementation of a voltage detecting circuit; FIG. 3 is another implementation of a voltage detecting circuit; Another implementation manner of the measuring circuit; FIG. 5 is still another implementation manner of the voltage detecting circuit; FIG. 6 is another implementation manner of the voltage detecting circuit; FIG. 7 is a flow chart of one of the operating modes of the control circuit; FIG. 8 is a schematic diagram showing that the voltage level of the detection voltage does not change; FIG. 9 is a schematic diagram showing a change in the voltage level of the detection voltage; FIG. 10 is a schematic diagram for explaining one of the restart times of the switch; FIG. Another way to determine the number of restarts of the switch.

1 is a circuit block diagram of a light source driving device in accordance with an embodiment of the present invention. Referring to FIG. 1 , the light source driving device 100 of the present invention is electrically coupled to the input power source Vin through the switch 120 and used to drive the light sources 130 and 140 . In this example, the input power source Vin is an AC power source. In addition, in this example, the light source 130 is configured to emit light of a first color, for example, to emit white light having a higher brightness, and the light source 140 is used to emit light of a second color, for example, a yellow light for emitting a warm color. This is not intended to limit the invention. The light sources 130 and 140 can each be realized by a light-emitting diode string, and each light-emitting diode string is composed of a plurality of serially connected light-emitting diodes, which is not intended to limit the present invention.

As shown in FIG. 1 , the light source driving device 100 includes a rectifier circuit 102 , a voltage conversion circuit 104 , and a light source switching device 101 . The light source switching device 101 further includes a switch circuit 106 , a switch circuit 108 , a voltage detection circuit 110 , and a control circuit . 112 and operating power supply circuit 114. In this example, the switch circuit 106 is configured to determine whether to receive the received input signal to the light source 130 according to the control signal CS1, thereby illuminating the light source 130; and the switch circuit 108 is configured to determine whether the control signal CS2 is used according to the control signal CS2. The input signal it receives is supplied to the light source 140, thereby illuminating the light source 140. In addition, the voltage conversion circuit 104 can be a boost circuit, a buck circuit, or a buck-boost circuit, and the circuit to be used depends on the actual design requirements. The rectifier circuit 102 is electrically coupled to the input power source Vin through the switch 120. The rectifier circuit 102 can be implemented, for example, by a bridge rectifier. In addition, the voltage conversion circuit 104 is electrically coupled to the output V1 of the rectifier circuit 102, the switch circuit 106 is electrically coupled to the output V2 of the voltage conversion circuit 104 and the light source 130, and the switch circuit 108 is electrically coupled to the output V2 of the voltage conversion circuit 104. And the light source 140.

In addition, the voltage detecting circuit 110 is electrically coupled to the output V2 of the voltage converting circuit 104, and generates a detecting voltage DV whenever the received voltage is greater than zero. FIG. 2 is one implementation of the voltage detection circuit 110. As shown in FIG. 2, the voltage detecting circuit 110 is implemented by a voltage dividing circuit 110-1, and the voltage dividing circuit 110-1 is implemented by impedances 110-2 and 110-3, wherein the impedance 110-2 is 110-3 can each be a resistor. One end of the impedance 110-2 is electrically coupled to the output V2 of the voltage conversion circuit 104, the switch circuit 106 and the switch circuit 108, and one end of the impedance 110-3 is electrically coupled to the other end of the impedance 110-2, and is used to generate a partial voltage. The voltage is used as the detection voltage DV, and the other end of the impedance 110-3 is electrically coupled to the reference potential VSS, which is, for example, a ground potential.

FIG. 3 is another implementation of the voltage detection circuit 110. As shown in FIG. 3, voltage detection circuit 110 is implemented by operational amplifier 110-4. The operating amplifier 110-4 is electrically coupled to the operating power supply VDD and the reference potential VSS, and the positive input terminal thereof is electrically coupled to the output V2 of the voltage converting circuit 104, the switching circuit 106 and the switching circuit 108, and the negative input terminal thereof is electrically coupled. The reference potential Vref is used to output the detection voltage DV. The above-described operation power source VDD may be the operation power source VCC output from the operation power supply circuit 114, and the reference potential VSS is, for example, a ground potential.

FIG. 4 is still another implementation of the voltage detection circuit 110. As shown in FIG. 4, the voltage detecting circuit 110 is composed of a voltage dividing circuit 110-1 and an operating amplifier 110-4. In this example, voltage divider circuit 110-1 is used to generate a divided voltage to the positive input of operational amplifier 110-4.

FIG. 5 is yet another implementation of the voltage detection circuit 110. As shown in FIG. 5, the voltage detecting circuit 110 is composed of a first transistor 110-5, a second transistor 110-6, and an impedance 110-7. The first transistor 110-5 has a first end, a second end and a first control end, and the first end thereof is electrically coupled to the operating power supply VDD through the impedance 110-7. The second transistor 110-6 has a third end, a fourth end, and a second control end, and the third end is electrically coupled to the second end of the first transistor 110-5, and is configured to output a detection voltage DV. The fourth terminal of the second transistor 110-6 is electrically coupled to the reference potential VSS, and the second control terminal thereof is electrically coupled to the output of the first control terminal, the switch circuit 106, the switch circuit 108, and the voltage conversion circuit 104. . The above-described operation power source VDD may be the operation power source VCC output from the operation power supply circuit 114, and the reference potential VSS is, for example, a ground potential. In addition, the impedance 110-7 can be realized by using a resistor, and the user can decide whether to use the impedance 110-7 according to the actual design requirements. In addition, the first transistor 110-5 and the second transistor 110-6 can be implemented, for example, by using an NPN-type bipolar transistor and a PNP-type bipolar transistor, respectively, or for example, N-type gold-oxygen half-field effect can be used respectively. The transistor is implemented with a P-type gold oxide half field effect transistor.

FIG. 6 is another implementation of the voltage detection circuit 110. As shown in FIG. 6, the voltage detecting circuit 110 is composed of a voltage dividing circuit 110-1, a first transistor 110-5, a second transistor 110-6, and an impedance 110-7.

Referring to FIG. 1 again, the operation power supply circuit 114 is electrically coupled to the output V2 of the voltage conversion circuit 104, and accordingly generates an operation power supply VCC to the control circuit 112. The operation power supply circuit 114 is internally provided with an energy storage component, for example, a capacitor is provided, so that after the switch 120 is switched from short to open, the operation power supply VCC is continuously supplied to the control circuit 112 for a short period of time. .

The control circuit 112 is electrically coupled to the voltage detecting circuit 110, the operating power supply circuit 114, the switching circuit 106, and the switching circuit 108. The control circuit 112 is configured to control the corresponding switch circuit to provide the output V2 of the voltage conversion circuit 104 to the corresponding light source according to the stored memory result (described later), and to determine the switch according to the voltage change of the detection voltage DV. The number of restarts (i.e., re-switched on or re-turned on) 120 determines whether to switch to another switch circuit to provide the output V2 of voltage conversion circuit 104 to the corresponding source. That is to say, the control circuit 112 can illuminate the light source of the corresponding color according to the memory result, and can determine the number of restarts of the switch 120 according to the voltage change of the detection voltage DV to determine whether to switch to illuminate the light source of another color. In one of the practical methods, the memory result is that the recording control circuit 112 outputs the control signal CS1 to control the switch circuit 106 to provide the output V2 of the voltage conversion circuit 104 to the light source 130, or to output the control signal CS2 to control. The switch circuit 108 provides the output V2 of the voltage conversion circuit 104 to the light source 140. The mode of operation of the control circuit 112 will be described in further detail below.

Assuming that the user switches the switch 120 from the open circuit to the short circuit to activate the light source driving device 100, the rectifier circuit 102 generates and outputs V1 according to the input power source Vin, and the voltage conversion circuit 104 also generates the output V1 according to the output of the rectifier circuit 102. And outputting V2, so that the operating power supply circuit 114 can generate the operating power supply VCC to the control circuit 112 according to the output V2 of the voltage converting circuit 104, and the voltage detecting circuit 110 can also generate the detecting voltage according to the output V2 of the voltage converting circuit 104. DV.

If the light source driving device 100 is activated for the first time after the completion of the manufacturing, the user has not recorded any user settings in the memory result stored by the control circuit 112 at this time, that is, the user has not recorded the memory result. The control circuit 112 is configured to output the control signal CS1 or CS2, so the control circuit 112 outputs the control signal CS1 or CS2 according to the original setting of the light source driving device 100 at the time of manufacture to control the presets in the switch circuits 106 and 108. The switching circuit supplies the output V2 of the voltage conversion circuit 104 to the corresponding source and records this setting in the memory result as the user's setting. Assuming that the original setting is to output the control signal CS1, the control circuit 112 generates a control signal CS1 to the switch circuit 106 to further illuminate the light source 130. On the contrary, assuming that the original setting is to output the control signal CS2, the control circuit 112 generates a control signal CS2 to the switch circuit 108 to further illuminate the light source 140. In other words, in the case where the light source driving device 100 is activated for the first time, the control circuit 112 directly illuminates the light source of the preset color.

On the other hand, if the light source driving device 100 is not activated for the first time, the control circuit 112 can operate in the manner shown in FIG. Figure 7 is a flow diagram of one of the modes of operation of control circuit 112. Referring to FIG. 1 and FIG. 7 simultaneously, since the light source driving device 100 is not activated for the first time, the control circuit 112 controls the corresponding switching circuit according to the memory result to provide the output V2 of the voltage converting circuit 104 to the corresponding light source. (as shown in step S702). In other words, as soon as the user activates the light source driving device 100, and the light source driving device 100 is not activated for the first time, the control circuit 112 directly lights up the light source of the color corresponding to the memory result.

Assuming that the current memory result is to output the control signal CS1, the control circuit 112 generates a control signal CS1 to control the switch circuit 106 to supply the output V2 of the voltage conversion circuit 104 to the light source 130, thereby illuminating the light source 130. Similarly, assuming that the current memory result is to output the control signal CS2, the control circuit 112 generates a control signal CS2 to control the switch circuit 108 to provide the output V2 of the voltage conversion circuit 104 to the light source 140, thereby illuminating the light source 140. .

Next, the control circuit 112 determines whether the switch 120 has restarted according to the voltage change of the detection voltage DV (as shown in step S704). If the switch 120 is not restarted, indicating that the switch 120 has not been switched, the voltage of the detection voltage DV will not change. As shown in FIG. 8, FIG. 8 shows that the voltage of the detection voltage DV does not change. Schematic diagram. Conversely, if the switch 120 is restarted, indicating that the switch 120 is switched, the voltage of the detection voltage DV will vary, as illustrated by FIG. FIG. 9 is a schematic diagram showing a change in the magnitude of the voltage of the detection voltage DV. It can be seen from the voltage change shown in FIG. 9 that the switch 120 is switched from the short circuit to the open circuit after the light source driving device 100 is started, and then switched from the open circuit to the short circuit, so that the switch 120 can be judged to be restarted once.

In the present invention, there are two methods for determining the number of restarts of the switch 120. FIG. 10 is a diagram for explaining one of the ways of determining the number of restarts of the switch 120. As shown in FIG. 10, when the control circuit 112 determines that the switch 120 is switched to be open, the control circuit 112 counts the preset time P and determines the number of restarts of the switch 120 during the preset time P. As shown in FIG. 10, it can be seen that the switch 120 is restarted twice in the preset time P. Of course, in this determination mode, the period of time during which the operating power supply circuit 114 continues to supply the operating power supply VCC to the control circuit 112 after the power is turned off must be greater than or equal to the preset time P.

FIG. 11 is another way of explaining the number of restarts of the judgment switch 120. Taking the example shown in FIG. 11 as an example, when the control circuit 112 determines that the switch 120 is switched to an open circuit, the control circuit 112 counts the preset time P, and whenever it is determined that the switch 120 is switched to the open circuit again within the preset time P, The preset time P is counted again. The control circuit 112 also counts a total of several preset times P to count the summed result as the number of restarts of the switch 120. As shown in FIG. 11, since the control circuit 112 counts the second preset time P in total, it can be seen that the switch 120 is restarted twice in the preset time P. Of course, in this judgment mode, the operation power supply circuit 114 must continue to provide the operation power supply VCC to the control circuit 112 after the power is turned off, and must be at least twice the preset time P.

Referring to FIG. 1 and FIG. 7 simultaneously, in step S704, if the determination result of the control circuit 112 is NO, the control circuit 112 re-executes the operation shown in step S704. On the other hand, in step S704, if the result of the determination by the control circuit 112 is YES, the control circuit 112 determines whether the number of restarts of the switch 120 is equal to or greater than twice (as shown in step S706).

In step S706, if the determination result of the control circuit 112 is negative, the control circuit 112 switches to another switching circuit to supply the output V2 of the voltage conversion circuit 104 to the corresponding light source, and records the setting, thereby updating. The result of the memory is as shown in step S708. In other words, if the user only restarts the switch 120 once, the control circuit 112 changes to light sources of different colors to achieve the purpose of switching the color of the lamp. In detail, if the original memory result is the output control signal CS1, after the step S208 is executed, the memory result is updated to output the control signal CS2. Similarly, if the original memory result is to output the control signal CS2, after the step S208 is performed, the memory result is updated to output the control signal CS1. The time point at which the memory result is updated may be set after the last preset time P is counted. Of course, if only the preset time P is counted once, the memory result may be updated after the preset time P is counted. After the step S708 is performed, the control circuit 112 returns to the operation shown in step S704.

On the other hand, in step S706, if the result of the determination by the control circuit 112 is YES, the control circuit 112 controls the preset switching circuits of the switch circuits 106 and 108 to supply the output V2 of the voltage conversion circuit 104 to the corresponding light source, and This setting is recorded to update the memory result (as shown in step S710). In other words, if the user restarts the switch 120 for two or more times, the control circuit 112 also directly illuminates the light source of the preset color. Similarly, the time point at which the memory result is updated may be set after the last preset time P is counted. Of course, if only the preset time P is counted once, the memory result may be updated after the preset time P is counted. After the step S710 is performed, the control circuit 112 returns to the operation shown in step S704.

It is worth mentioning that, although in step S706 of FIG. 7, the control circuit 112 determines whether the number of restarts of the switch 120 is greater than or equal to two times, the number of times is not intended to limit the present invention, and those skilled in the art may The actual design requirements are changed, for example, to determine whether the number of restarts of the switch 120 is greater than or equal to three times. In addition, as can be seen from the above description, the light source driving circuit 100 of the present invention can remember the light source of the color preferred by the user, and eliminates the need for the user to switch back to the light source of the preferred color each time the user uses the light source driving device 100. Troubled.

Although the input power source Vin is an AC power source in the above embodiment, it is not intended to limit the present invention. It is known to those skilled in the art that the input power source Vin can also be a DC power source. In addition, the user can also determine whether to use the rectifier circuit 102 and the voltage conversion circuit 104 in the light source driving device 100 according to actual design requirements. In addition, taking a flashlight having two different color light sources and a switch as an example, since the input power source Vin is a DC power source provided by the battery in the flashlight, the user can directly use the light source switching device 101 to electrically couple the light source. Between the two light sources of the flashlight and the switch of the flashlight, the purpose of switching the color of the lamp is achieved. Of course, if the voltage of the operating power supply VCC required by the control circuit 112 is equal to the voltage of the DC power supply, the operating power supply circuit 114 may not be used in the light source switching device 101, and only the operating power of the control circuit 112 is required. The input terminal is also electrically coupled to the battery through the switch of the flashlight.

In addition, by the above description, those skilled in the art can construct a lighting device by using the light source driving device 100, the light source 130 and the light source 140 of the present invention.

In summary, the light source driving device of the present invention can illuminate the corresponding light source according to the memory result, and can determine the number of restarts of the switch according to the voltage change of the detected voltage to determine whether to switch to another light source, so the present invention The light source driving device can control the operation of two or more light sources by using a single switch.

Claims (42)

 A light source driving device comprising: a rectifying circuit for electrically coupling an input power source through a switch; a voltage converting circuit electrically coupled to the output of the rectifying circuit; and a light source switching device comprising: a first a switching circuit electrically coupled to the output of the voltage conversion circuit and a first light source; a second switching circuit electrically coupled to the output of the voltage conversion circuit and a second light source; a voltage detection circuit, electrical An output of the voltage conversion circuit is coupled, and a detection voltage is generated each time the received voltage is greater than zero; and a control circuit electrically coupled to the voltage detection circuit and the first switching circuit And the second switch circuit is configured to control a corresponding one of the switch circuits according to a memory result to provide the output of the voltage conversion circuit to the corresponding light source, and to determine a restart of the switch according to the voltage change of the detected voltage The number of times to decide whether to switch to another switching circuit to provide the output of the voltage conversion circuit to the corresponding light source.    The light source driving device of claim 1, wherein when the control circuit determines that the switch is switched to an open circuit, it counts a preset time, and each time the preset time is determined, the switch is switched again. When the circuit is disconnected, the preset time is re-counted, and the control circuit also counts the preset time several times in total to treat the total result as the number of restarts.    The light source driving device of claim 1, wherein when the control circuit determines that the switch is switched to an open circuit, it counts a preset time and determines the number of restarts of the switch within the preset time. .    The light source driving device of claim 1, wherein when the number of restarts is one, the control circuit switches to another switching circuit to supply the output of the voltage converting circuit to the corresponding light source.    The light source driving device of claim 1, wherein when the number of restarts is greater than or equal to two times, the control circuit controls one of the first switch circuit and the second switch circuit to preset the switch circuit. The output of the voltage conversion circuit is provided to a corresponding light source.    The light source driving device of claim 1, wherein the first light source emits a first color light and the second light source emits a second color light.    The light source driving device of claim 1, wherein the first light source and the second light source each comprise a light emitting diode string.    The light source driving device of claim 1, wherein the light source switching device further comprises an operating power supply circuit, the operating power supply circuit is electrically coupled to the output of the voltage converting circuit, and accordingly generates an operating power supply Give the control circuit.    The light source driving device of claim 1, wherein the voltage detecting circuit comprises: a voltage dividing circuit electrically coupled to the output of the voltage converting circuit for generating a divided voltage as the Detect voltage.    The light source driving device of claim 1, wherein the voltage detecting circuit comprises: an operating amplifier electrically coupled to an operating power supply and a first reference potential, and the positive input end thereof is electrically coupled to the The output of the voltage conversion circuit has a negative input terminal electrically coupled to a second reference potential, and an output terminal for outputting the detected voltage.    The light source driving device of claim 10, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled between the output of the voltage converting circuit and the positive input terminal of the operating amplifier; And used to generate a divided voltage to the positive input of the operational amplifier.    The light source driving device of claim 1, wherein the voltage detecting circuit comprises: a first transistor having a first end, a second end and a first control end, wherein the first end is electrically And a second transistor having a third end, a fourth end and a second control end, wherein the third end is electrically coupled to the second end, and is configured to output the detection The fourth terminal is electrically coupled to a reference potential, and the second control terminal is electrically coupled to the output of the first control terminal and the voltage conversion circuit.    The light source driving device of claim 12, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled between the output of the voltage converting circuit and the second control end, and used To generate a divided voltage to the second control terminal.    A lighting device comprising: a first light source; a second light source; a rectifier circuit for electrically coupling an input power source through a switch; and a voltage conversion circuit electrically coupled to the output of the rectifier circuit; A light source switching device includes: a first switching circuit electrically coupled to the output of the voltage converting circuit and the first light source; and a second switching circuit electrically coupled to the output of the voltage converting circuit and the second light source a voltage detecting circuit electrically coupled to the output of the voltage converting circuit, and generating a detecting voltage whenever the received voltage is greater than zero; and a control circuit electrically coupling the voltage The detecting circuit, the first switching circuit and the second switching circuit are configured to control a corresponding one of the switching circuits to provide an output of the voltage converting circuit to the corresponding light source according to a memory result, and to use the detected voltage according to the detected voltage The voltage change determines a number of restarts of the switch to determine whether to switch to another switch circuit to provide the output of the voltage conversion circuit to the corresponding source.    The lighting device of claim 14, wherein when the control circuit determines that the switch is switched to an open circuit, it counts a preset time, and each time the preset time is determined, the switch is switched again to When the circuit is disconnected, the preset time is re-counted, and the control circuit also counts the preset time several times in total to treat the total result as the number of restarts.    The lighting device of claim 14, wherein when the control circuit determines that the switch is switched to an open circuit, it counts a preset time and determines the number of restarts of the switch within the preset time.    The illumination device of claim 14, wherein when the number of restarts is one, the control circuit switches to another switch circuit to provide an output of the voltage conversion circuit to the corresponding light source.    The lighting device of claim 14, wherein when the number of restarts is greater than or equal to two times, the control circuit controls one of the first switch circuit and the second switch circuit to preset the switch circuit The output of the voltage conversion circuit is provided to a corresponding light source.    The illuminating device of claim 14, wherein the first light source emits a first color light and the second light source emits a second color light.    The illuminating device of claim 14, wherein the first light source and the second light source each comprise a light emitting diode string.    The illuminating device of claim 14, wherein the light source switching device further comprises an operating power supply circuit, the operating power supply circuit is electrically coupled to the output of the voltage converting circuit, and accordingly generates an operating power supply The control circuit.    The light source driving device of claim 14, wherein the voltage detecting circuit comprises: a voltage dividing circuit electrically coupled to the output of the voltage converting circuit for generating a divided voltage as the Detect voltage.    The light source driving device of claim 14, wherein the voltage detecting circuit comprises: an operating amplifier electrically coupled to an operating power source and a first reference potential, and the positive input terminal thereof is electrically coupled to the The output of the voltage conversion circuit has a negative input terminal electrically coupled to a second reference potential, and an output terminal for outputting the detected voltage.    The light source driving device of claim 23, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled between the output of the voltage converting circuit and the positive input terminal of the operating amplifier And used to generate a divided voltage to the positive input of the operational amplifier.    The light source driving device of claim 14, wherein the voltage detecting circuit comprises: a first transistor having a first end, a second end and a first control end, wherein the first end is electrically And a second transistor having a third end, a fourth end and a second control end, wherein the third end is electrically coupled to the second end, and is configured to output the detection The fourth terminal is electrically coupled to a reference potential, and the second control terminal is electrically coupled to the output of the first control terminal and the voltage conversion circuit.    The light source driving device of claim 25, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled between the output of the voltage converting circuit and the second control end, and used To generate a divided voltage to the second control terminal.    A light source switching device includes: a first switching circuit electrically coupled to a first light source; a second switching circuit electrically coupled to a second light source; and a voltage detecting circuit electrically coupled to the first a switching circuit and the second switching circuit are electrically coupled to an input power source through a switch, and each time the received voltage is greater than zero, a detection voltage is generated; and a control circuit, electrical The voltage detection circuit, the first switch circuit and the second switch circuit are coupled to control a corresponding one of the switch circuits to provide a corresponding input signal to the corresponding light source according to a memory result, and The voltage change of the voltage is detected to determine the number of restarts of the switch to determine whether to switch to another switch circuit to provide the received input signal to the corresponding light source.    The light source switching device of claim 27, wherein when the control circuit determines that the switch is switched to an open circuit, it counts a preset time, and each time the preset time is determined, the switch is switched again. When the circuit is disconnected, the preset time is re-counted, and the control circuit also counts the preset time several times in total to treat the total result as the number of restarts.    The light source switching device of claim 27, wherein when the control circuit determines that the switch is switched to be open, it counts a preset time and determines the number of restarts of the switch within the preset time. .    The light source switching device of claim 27, wherein when the number of restarts is one, the control circuit switches to another switch circuit to supply the received input signal to the corresponding light source.    The light source switching device of claim 27, wherein when the number of restarts is greater than or equal to two times, the control circuit controls one of the first switch circuit and the second switch circuit to preset the switch circuit The input signal it receives is provided to the corresponding light source.    The light source switching device of claim 27, wherein the first light source emits a first color light and the second light source emits a second color light.    The light source switching device of claim 27, wherein the first light source and the second light source each comprise a light emitting diode string.    The light source switching device of claim 27, further comprising an operating power supply circuit for generating an operating power supply to the control circuit.    The light source switching device of claim 27, wherein the voltage detecting circuit is further electrically coupled to the switch through a voltage conversion circuit.    The light source switching device of claim 27, wherein the voltage detecting circuit is electrically coupled to the switch through a rectifying circuit.    The light source switching device of claim 27, wherein the voltage detecting circuit is further electrically coupled to the switch through a voltage converting circuit and a rectifying circuit.    The light source driving device of claim 27, wherein the voltage detecting circuit comprises: a voltage dividing circuit electrically coupled to the first switching circuit and the second switching circuit, and configured to generate a partial pressure The voltage is used as the detection voltage.    The light source driving device of claim 27, wherein the voltage detecting circuit comprises: an operating amplifier electrically coupled to an operating power supply and a first reference potential, and the positive input terminal thereof is electrically coupled to the The first switching circuit and the second switching circuit have a negative input terminal electrically coupled to a second reference potential, and an output terminal for outputting the detected voltage.    The light source driving device of claim 39, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled to the first switching circuit, the second switching circuit and the operating amplifier Between the positive inputs, and used to generate a divided voltage to the positive input of the operational amplifier.    The light source driving device of claim 27, wherein the voltage detecting circuit comprises: a first transistor having a first end, a second end and a first control end, wherein the first end is electrically And a second transistor having a third end, a fourth end and a second control end, wherein the third end is electrically coupled to the second end, and is configured to output the detection The fourth terminal is electrically coupled to a reference potential, and the second control terminal is electrically coupled to the first control terminal, the first switch circuit, and the second switch circuit.    The light source driving device of claim 41, wherein the voltage detecting circuit further comprises: a voltage dividing circuit electrically coupled to the first switching circuit, the second switching circuit and the second control Between the ends, and used to generate a divided voltage to the second control terminal.