CN109475025B - lighting device - Google Patents

Abstract

A lighting device includes a first light emitting region, a second light emitting region, a color temperature controller, and a balancing circuit. The first light emitting region includes a first light emitting array connected in series and outputs light of a first color temperature. The second light emitting region includes a second light emitting array connected in series, the second light emitting region being connected in parallel to the first light emitting region. The second light emitting array outputs light of a second color temperature different from the first color temperature. The color temperature controller is selectively connected to at least one of an input node of the first light emitting region and an input node of the second light emitting region. The color temperature controller determines on/off states of the first light emitting region and the second light emitting region. The balancing circuit is connected in series to at least one of the first light emitting region and the second light emitting region.

Description

lighting device

Cross-references to related applications

Korean Patent Application No. 10-2017-0114964, titled "Lighting Equipment", was submitted to the Korean Intellectual Property Office on September 8, 2017, and Korean Patent Application No. was submitted to the Korean Intellectual Property Office on July 25, 2018. The entire contents of 10-2018-0086709 are incorporated herein by reference.

Technical field

One or more embodiments described herein relate to lighting devices.

Background technique

Compared with other types of light-emitting elements, semiconductor light-emitting elements, such as light-emitting diodes (LEDs), have low power consumption, high brightness, and long lifespan. Some semiconductor light-emitting elements output light of different color temperatures and are therefore suitable for use in lighting equipment. However, these types of semiconductor light emitting elements may encounter various problems. For example, the brightness of the light produced by these elements may change or vary each time the user makes adjustments to the color temperature.

Contents of the invention

According to one or more embodiments, a lighting device includes: a first light-emitting area including a plurality of first light-emitting arrays connected in series, the first light-emitting arrays outputting light of a first color temperature; a second light-emitting area including a series-connected A plurality of connected second light-emitting arrays, the second light-emitting area is connected in parallel with the first light-emitting area, the second light-emitting array outputs light with a second color temperature different from the first color temperature; a color temperature controller, It is selectively connected to at least one of the input node of the first light-emitting area and the input node of the second light-emitting area, and the color temperature controller determines the color temperature of the first light-emitting area and the second light-emitting area. an on/off state; and a balancing circuit connected in series to at least one of the first light-emitting area and the second light-emitting area.

According to one or more other embodiments, a lighting device includes: a substrate; a first lighting area including a plurality of first LEDs mounted on the substrate; and a second lighting area including a plurality of first LEDs mounted on the substrate. a second LED, the plurality of second LEDs outputting light with a color temperature higher than that of the plurality of first LEDs; a color temperature controller including a user-operable switch, the color temperature controller operates through the switch determining an on/off state of each of the first light-emitting area and the second light-emitting area; and a balancing circuit connected between the second light-emitting area and the color temperature controller.

According to one or more other embodiments, a lighting device includes: a first lighting area including a plurality of first LEDs outputting light of a first color temperature, the first lighting area including a first input node and a second input node; a second light-emitting area including a plurality of second LEDs outputting light of a second color temperature higher than the first color temperature, the second light-emitting area including a third input node and a fourth input node; a power supply that inputs driving power to at least a portion of the first input node to the fourth input node; and a switch that connects at least a portion of the first input node to the fourth input node to each other and regulates the The color temperature of the light output by the first light-emitting area and the second light-emitting area.

Description of the drawings

Features will become apparent to those skilled in the art by describing exemplary embodiments in detail with reference to the accompanying drawings, in which:

Figure 1 shows an embodiment of a lighting device;

Figure 2 shows another type of lighting device;

Figure 3 shows another embodiment of a lighting device;

Figure 4 shows a circuit embodiment of a lighting device;

Figure 5 shows another embodiment of a lighting device;

Figure 6 shows an embodiment of an operating lighting device;

Figures 7 to 9 illustrate additional circuit embodiments of lighting devices;

Figures 10 to 15 illustrate further circuit embodiments of lighting devices; and

Figure 16 shows another circuit embodiment of a lighting device.

Detailed ways

FIG. 1 shows an embodiment of a lighting device 1 , which may include a substrate 2 , a first light-emitting area 3 , a second light-emitting area 4 , a driving circuit 5 , a color temperature controller 6 , a connector 7 and a terminal 8 . The first light emitting area 3 may include a plurality of first LEDs mounted on the substrate 2 . The second light emitting area 4 may include a plurality of second LEDs mounted on the substrate 2 . The plurality of first LEDs and the plurality of second LEDs may output light of different color temperatures. In example embodiments, the first LED may output light at a first color temperature, and the second LED may output light at a second color temperature higher than the first color temperature.

The first light-emitting area 3 and the second light-emitting area 4 can be operated by external power through the connector 7 . In an example embodiment, commercial alternating current (AC) power may be input through connector 7 . The driving circuit 5 may include a power supply to supply driving power to the first and second light emitting areas 3 and 4 using commercial AC power. In example embodiments, the power supply may include a rectifier that rectifies commercial AC power to generate driving power.

In one embodiment, the driving circuit 5 may include a driver and a power supply that control the on/off states of a plurality of first LEDs and a plurality of second LEDs. For example, the driver may detect the magnitude of the driving power and control the on/off states of the plurality of first LEDs and the plurality of second LEDs based on the detected magnitude of the driving power. The lighting device 1 can therefore be operated by receiving commercial AC without the need for a separate constant current converter circuit.

In an example embodiment, the color temperature controller 6 may adjust the color temperature of the light output by the lighting device 1 . The color temperature controller 6 can adjust the color temperature of the light output by the lighting device between the first color temperature (corresponding to the light output by the first light-emitting area 3) and the second color temperature (corresponding to the light output by the second light-emitting area 4). In an example embodiment, when the first color temperature is 3000K and the second color temperature is 5000K, the color temperature of the light output by the lighting device 1 may be adjusted by the color temperature controller 6 to be in the range of 3000K to 5000K. In another embodiment, these values may be different.

The color temperature controller 6 may be connected to a user-adjustable mechanical switch or an electronic switch, or may be connected to another electronic device through wired/wireless communication. The user can operate a mechanical switch or an electronic switch to increase or decrease the color temperature. In one embodiment, an electronic device (eg, an application on a mobile device) connected to be able to communicate with the color temperature controller 6 can be executed by a user, and the color temperature of the light output by the lighting device 1 can be adjusted in the application.

Terminals 8 may be included in substrate 2 and connected to one or more additional circuit elements (eg, bypass capacitors, filters or other elements). In one embodiment, the terminals 8 may be connected to circuit patterns inside the substrate 2 and/or in the upper and lower surfaces of the substrate 2 .

Figure 2 shows another type of lighting device 10, which may include a power supply 12 that receives commercial AC power 11 and generates driving power, a light emitting area 13 having a plurality of LEDs, and a driver 14. The lighting device 10 may not have a color temperature adjustment function, and multiple LEDs in the light emitting area 13 may operate simultaneously.

Figure 3 shows another embodiment of a lighting device 20, which may include a power supply 22 that receives commercial AC power 21 and generates driving power, a light emitting area 23 having a plurality of LEDs, and a color temperature controller 25. The light-emitting area 23 may include a first light-emitting area having a plurality of first LEDs outputting light of a first color temperature and a second light-emitting area having a plurality of second LEDs outputting light of a second color temperature different from the light of the first color temperature. . The first light emitting area and the second light emitting area may be connected in parallel with each other.

The driver 24 detects the magnitude of the driving power output by the power supply 22 and adjusts the number of LEDs that have been turned on in each of the first and second light-emitting areas. The color temperature controller 25 may include a switching element to selectively apply driving power to at least one of the input node of the first light-emitting area and the input node of the second light-emitting area. Based on the operation of the switch in the color temperature controller 25, the first light-emitting area and the second light-emitting area may be turned on at the same time, or only one of the first light-emitting area and the second light-emitting area may be turned on.

The operation controller 27 can control the operation of the switch in the color temperature controller 25 . In an example embodiment, the operation controller 27 may be a mechanical operation device or an electronic operation device connected to the color temperature controller 25 . When the user operates the operating device of the operating controller 27, the color temperature of the light output by the lighting device 20 can be changed by the switch in the color temperature controller 25. Therefore, unlike the lighting device 10 of Figure 2, the user can intentionally change the color temperature of the light.

The balancing circuit 26 may be between the color temperature controller 25 and the light emitting area 23 . The balancing circuit 26 may include a resistor, a diode, and/or another element connected in series to only one or both of the first and second light emitting regions. The balancing circuit 26 can enable the color temperature, brightness and/or other parameters of the light output from the light-emitting area 23 to be finely adjusted.

FIG. 4 shows a circuit embodiment of the lighting device 100, which may include a power supply 110, a light emitting area 120, a color temperature controller 130, and a driver 140. Power supply 110 may receive AC power VAC and generate driving power VIN. The light emitting area 120 may include a first light emitting area 120A and a second light emitting area 120B that receive the driving power VIN. The first light emitting area 120A may include a plurality of first light emitting arrays 121A to 124A, and the second light emitting area 120B may include a plurality of second light emitting arrays 121B to 124B.

In the example embodiment of FIG. 4 , operations of the first light emitting arrays 121A to 124A and the second light emitting arrays 121B to 124B may be controlled by the driver 140 . For example, the driver 140 may detect the magnitude of the driving power VIN and control the on/off states of the LEDs in the first light emitting arrays 121A to 124A and the second light emitting arrays 121B to 124B, thereby driving the light emitting area 120 . An example of the operation of driver 140 is provided with reference to FIG. 5 .

In the example embodiment of FIG. 4 , the input nodes 121 to 124 of the first and second light-emitting areas 120A and 120B may be selectively connected to the output node 111 of the power supply 110 through the color temperature controller 130 . The color temperature controller 130 of FIG. 4 may include a switching element, and at least one of the first and second light emitting areas 120A and 120B may receive the driving power VIN for operation through the color temperature controller 130.

As described above, the first light emitting area 120A may output light of a first color temperature, and the second light emitting area 120B may output light of a second color temperature different from the first color temperature. Therefore, according to the operation of the color temperature controller 130, the color temperature of the light output by the light emitting area 120 may be determined to be between the first color temperature and the second color temperature.

In example embodiments, an operating device for controlling the color temperature controller 130 may be provided to a user. Operating devices may include, for example, jog shuttles, slide switches, buttons, and/or other devices. The user uses the operating device to control the color temperature controller 130 so as to set the color temperature of the light output by the lighting device 100 to a desired value.

The diode block 150 may be between the driver 140 and the light emitting area 120 . The diode block 150 may be connected to nodes NA1 to NA3 between the first light emitting arrays 121A to 124A, and to nodes NB1 to NB3 between the second light emitting arrays 121B to 124B. The diode block 150 may operate to block electrical current such that electrical current cannot flow from the driver 140 to the light emitting area 120 .

Figure 5 shows another circuit embodiment of a lighting device, in which the driver 140 includes a switch controller 141 and a plurality of internal switches SW1 to SW3. In an example embodiment, the plurality of internal switches SW1 to SW3 may be respectively connected to the nodes NA1 to NA3 between the first light emitting arrays 121A to 124A through the diode block 150 and to the nodes NA1 to NA3 between the second light emitting arrays 121B to 124B, respectively. Nodes NB1 to NB3. For example, the first internal switch SW1 may be connected to the first nodes NA1 and NB1 through the diode pair DA1 and DB1 of the first block. The first internal switch SW2 may be connected to the second nodes NA2 and NB2 through the diode pair DA2 and DB2 of the second block. The third internal switch SW3 may be connected to the third nodes NA3 and NB3 through the diode pair DA3 and DB3 of the third block.

The switch controller 141 may control operations of the plurality of internal switches SW1 to SW3 according to the magnitude of the voltage of the driving power VIN to determine a path for current to flow into the light-emitting area 120 . The driving power VIN may have a voltage waveform generated by full-wave rectified AC power. The switch controller 141 may adjust the number of the light emitting arrays 121A to 124A and 121B to 124B that receive the driving power VIN based on the magnitude of the voltage change in the driving power VIN. An example will be described with reference to FIG. 6 .

Figure 6 shows a graph corresponding to the operation of the lighting device. Referring to FIG. 6 , the driving power VIN input to the light emitting area 120 may have a waveform repeated every predetermined period. In an example embodiment, the driving power VIN is generated from full-wave rectified commercial AC power of 220V-60Hz, and thus may have a peak voltage of 220V and a frequency of 120Hz.

In one period T1, the driving power VIN may be divided into a predetermined number (for example, 9) of periods t1 to t9. During the first period t1 and the ninth period t9 , the magnitude of the voltage of the driving power VIN is relatively small, and therefore a voltage sufficient to operate the light emitting area 120 may not be supplied. Therefore, the light emitting area 120 may not be turned on during the first period t1 and the ninth period t9.

In the second period t2 and the eighth period t8, the current I1 may be supplied to the light emitting area 120 by the driving power VIN. During the second period t2 and the eighth period t8, the voltage of the driving power VIN is sufficient to drive the primary light-emitting arrays 121A and 121B, but may not be sufficient to simultaneously drive the primary light-emitting arrays 121A and 121B and the secondary light-emitting arrays 122A and 122B. Therefore, the switch controller 141 allows only the first internal switch SW1 of the plurality of internal switches SW1 to SW3 to be turned on, and thus can cause the current I1 to flow through the primary light emitting arrays 121A and 121B, the diode pairs DA1 and DB1 of the first block, and First internal switch SW1. Therefore, during the second period t2 and the eighth period t8, only the primary light emitting arrays 121A and 121B operate. The remaining light emitting arrays 122A to 124A and 122B to 124B may not operate.

In the third period t3 and the seventh period t7, the voltage of the driving power VIN may be a voltage sufficient to drive the primary light emitting arrays 121A and 121B and the secondary light emitting arrays 122A and 122B. Therefore, in the third period t3 and the seventh period t7, the switch controller 141 may allow only the second internal switch SW2 to be turned on and may allow the remaining internal switches SW1 and SW3 to be turned off. Finally, in the third period t3 and the seventh period t7, the path of the current I2 supplied to the light-emitting area 120 may be defined to pass through the primary light-emitting arrays 121A and 121B and the secondary light-emitting arrays 122A and 122B, the diode pair DA2 of the second block and DB2 and the path of the second internal switch SW2. Therefore, in the third period t3 and the seventh period t7, only the primary light emitting arrays 121A and 121B and the secondary light emitting arrays 122A and 122B may be turned on.

Similarly, in the fourth period t4 and the sixth period t6, the voltage of the driving power VIN may be sufficient to drive the primary light-emitting arrays 121A and 121B to the third-level light-emitting arrays 123A and 123B. However, during the fourth period t4 and the sixth period t6, the voltage of the driving power VIN may not be sufficient to drive all the light emitting arrays 121A to 124A and 121B to 124B. Therefore, during the fourth period t4 and the sixth period t6, the switch controller 141 only allows the third internal switch SW3 to be turned on, and thus can control the current I3 to only flow through the primary light-emitting arrays 121A and 121B to the third-level light-emitting arrays 123 and 121B. 123B.

In the fifth period t5, the voltage of the driving power VIN may be sufficient to drive all the light emitting arrays 121A to 124A and 121B to 124B. Therefore, in the fifth period t5, the switch controller 141 allows all the internal switches SW1 to SW3 to be turned off, and thus all the light emitting arrays 121A to 124A and 121B to 124B can be set to be operated by the current I4.

As described before, the current ILED flowing into the light emitting region 120 may flow toward the inside of the driver 140 during at least a part of one cycle of the driving power VIN. In the example embodiment, the diode block 150 is between the driver 140 and the light emitting area 120 and thus can prevent the current ILED from flowing from the driver 140 to the light emitting area 120 .

Figures 7-9 illustrate additional circuit embodiments for operating lighting devices. In the example embodiments shown in FIGS. 7 to 9 , the light-emitting area 120 may include a first light-emitting area 120A that outputs light with a first color temperature, and a second light-emitting area 120B. Light with a second color temperature is output. The second color temperature may be higher than the first color temperature. For example, when the first light-emitting area 120A and the second light-emitting area 120B output white light, the first light-emitting area 120A may be a warm white light source, and the second light-emitting area 120B may be a cool white light source.

First, in the example embodiment of FIG. 7 , the color temperature controller 130 may allow the first input node 121 and the second input node 122 of the first light emitting area 120A to be connected to the output node 111 of the power supply 110 . In addition, the third input node 123 and the fourth input node 124 of the second light emitting area 120B may be separated from the output node 111 of the power supply 110 . Therefore, only the first light emitting area 120A receives the driving power VIN to operate. In this case, the operation of the first light emitting area 120A may be similar to the operation described with reference to FIGS. 5 and 6 . Therefore, in the example embodiment of FIG. 7, lighting device 100A may output light having a first color temperature.

Next, referring to FIG. 8 , the color temperature controller 130 may allow the second input node 122 of the first light-emitting area 120A and the third input node 123 of the second light-emitting area 120B to be connected to the output node 111 of the power supply 110 . In addition, the first input node 121 of the first light emitting area 120A and the fourth input node 124 of the second light emitting area 120B may be separated from the output node 111 of the power supply 110 . Therefore, in the example embodiment of FIG. 8 , the first and second light emitting areas 120A, 120B of the lighting device 100B may be turned on. As a result, the light output by the lighting device 100B may have a color temperature higher than the first color temperature and lower than the second color temperature.

Referring to FIG. 9 , the color temperature controller 130 may allow the third and fourth input nodes 123 and 124 of the second light emitting area 120B to be connected to the output node 111 of the power supply 110 . At the same time, the first input node 121 and the second input node 122 of the first light emitting area 120A may be separated from the output node 111 of the power supply 110 . In the example embodiment of FIG. 9 , only the second light emitting area 120B of the lighting device 100C is turned on and light having the second color temperature may be output.

In the example embodiments of FIGS. 7 to 9 , one or more nodes connected to the output node 111 of the power supply 110 using the color temperature controller 130 among the first to fourth input nodes 121 to 124 may be determined by the user. The color temperature controller 130 may be implemented as a switching element. An operating device may be provided to a user to operate or control the connection status of the color temperature controller 130 . The operating device can be implemented in various ways, including but not limited to a sliding switch, a button, a touch screen, an application on a mobile device, or a push button. The user uses the operating device to operate the color temperature controller 130, so the color temperature of the light output by the light-emitting area 120 can be adjusted between the first color temperature and the second color temperature.

10 to 15 show additional circuit diagrams of the lighting device, which may include a power supply 210, a light emitting area 220, a color temperature controller 230, a driver 240, and a diode block 250. The light emitting area 220 may include a first light emitting device receiving driving power VIN. The first light-emitting area 220A may include a plurality of first light-emitting arrays 221A to 224A, and the second light-emitting area 220B may include a plurality of second light-emitting arrays 221B to 224B. In the example embodiments of FIGS. 10 to 15 , the light emitting area 220 may receive the driving power VIN generated by the power supply 210 to operate. The light emitting area 220 may include a first light emitting area 220A having a plurality of first LEDs outputting light of a first color temperature and a second light emitting area 220B having a plurality of second LEDs outputting light of a second color temperature. In example embodiments, the second color temperature may be higher than the first color temperature, the first light emitting area 220A may be a warm white light source, and the second light emitting area 220B may be a cool white light source.

The first light emitting area 220A may be connected to the first input node 221 and the second input node 222. The second light emitting area 220B may be connected to the third input node 223 and the fourth input node 224. At least part of the first to fourth input nodes 221 to 224 may be connected to the output node 211 of the power supply 210 through the color temperature controller 230 . The color temperature controller 230 may be implemented as a switching element, for example, and at least one of the first and second light emitting areas 220A and 220B may receive the driving power VIN through the color temperature controller 130 to operate. Therefore, the user can use the color temperature controller 230 to adjust the color temperature of the light output by the light-emitting area 220 between the first color temperature and the second color temperature.

The lighting devices 200A, 200B, 200C, 200D, 200E, and 200F of Figures 10-15 may include balancing circuits 260A, 260B, 260C, 260D, 260E, and 260F, respectively. The balancing circuits 260A, 260B, 260C, 260D, 260E, and 260F may include at least one of resistors, rectifier diodes, and light emitting diodes.

First, referring to Figure 10, lighting device 200A may include balancing circuit 260A. The balancing circuit 260A may include a resistor R1 and may be connected only to the second light emitting region 220B.

When the color temperature controller 230 is connected to the first input node 221 and the second input node 222, only the first light emitting area 220A is turned on. As a result, light having the first color temperature can be output. When the color temperature controller 230 is connected to the third input node 223 and the fourth input node 224, only the second light emitting area 220B is turned on. As a result, light having the second color temperature can be output. When the user operates the color temperature controller 230 and changes the color temperature of the light output by the light emitting area 220, then, in one embodiment, if possible, only the color temperature of the light is changed while the brightness of the light remains unchanged.

In other types of devices that have been proposed, an LED that outputs cool white light may output brighter light, assuming the same amount of current is supplied compared to an LED that outputs warm white light. Therefore, in the example embodiment of FIG. 10 , in order to significantly reduce the brightness deviation of the light-emitting area 220 due to the operation of the color temperature controller 230 , the balancing circuit 260A may be connected only to the second light-emitting area 220B that outputs cool white light. The balancing circuit 260A can reduce the voltage supplied to the LEDs in the second light-emitting area 220B, and therefore, the brightness deviation of the first light-emitting area 220A and the second light-emitting area 220B can be significantly reduced.

Next, referring to FIG. 11 , the balancing circuit 260B may include a first resistor R1 and a second resistor R2. The first resistor R1 may be connected between the second input node 222 and the first light emitting area 220A. The second resistor R2 may be connected between the third input node 223 and the second light emitting area 220B.

In the example embodiment of FIG. 11 , when the user desires to obtain light having a color temperature corresponding to an intermediate value between the first color temperature and the second color temperature, light having the color temperature desired by the user can be accurately provided. When the user requires the color temperature controller 230 to allow the output node 211 of the power supply 210 to be connected to the second input node 222 and the third input node 223, light having a color temperature corresponding to an intermediate value between the first color temperature and the second color temperature can be obtained . When the first light-emitting area 220A and the second light-emitting area 220B are turned on simultaneously, each of the first resistor R1 and the second resistor R2 may be selected to have a function that allows each of the first light-emitting area 220A and the second light-emitting area 220B to A resistor value that outputs light of the same brightness.

Next, referring to FIG. 12 , the balancing circuit 260C may include a first resistor R1 , a second resistor R2 , a first diode D1 and a second diode D2 . The first resistor R1 and the first diode D1 may be connected in series with each other and may be connected between the second input node 222 and the first light emitting region 220A. The second resistor R2 and the second diode D2 may be connected in series with each other and may be connected between the third input node 223 and the second light emitting region 220B. When the color temperature controller 230 is connected to the second input node 222 and the third input node 223, the components R1, R2, D1 and D2 in the balancing circuit 260C can set the color temperature of the light output by the light emitting area 220 to have the first color temperature. The intermediate value between the second color temperatures.

In the embodiment shown in FIG. 13 , the balancing circuit 260D includes a light emitting diode LED, which may be connected only to the second light emitting area 220B. As mentioned above, through the color temperature controller 230, only the first light-emitting area 220A or only the second light-emitting area 220B can be turned on, or the first light-emitting area 220A and the second light-emitting area 220B can be turned on at the same time. When the user changes the color temperature of the light output by the light emitting area 220 using the color temperature controller 230, it may be preferable to change only the color temperature of the light while maintaining the brightness of the light as much as possible.

Assuming that only the color temperature is changed and the voltage/current supplied to the light-emitting area 220 remains unchanged, the second light-emitting area 220B outputting cool white light can be brighter compared to the first light-emitting area 220A outputting warm white light. In the example embodiment of FIG. 13 , in order to reduce the brightness deviation of the light-emitting area 220 due to color temperature changes, the light-emitting diode LED may be connected to the second light-emitting area 220B as a balancing circuit 260D. The light emitting diode LED may output the same cool white light as the second light emitting area 220B. The forward voltage supplied to each light-emitting diode included in the second light-emitting area 220B can be reduced by the light-emitting diode LED, and therefore, the brightness deviation of the first light-emitting area 220A and the second light-emitting area 220B caused by the color temperature change can be minimized. change. Moreover, compared with the case of using components such as resistors, the heat generation of the balancing circuit 260D can be reduced, the size of the balancing circuit 260D can be reduced, and the circuit operating efficiency can be improved at the same time. According to embodiments, the balancing circuit 260D may also include a plurality of light emitting diodes LED.

Next, referring to FIG. 14 , the balancing circuit 260E may include a first light emitting diode LED1 and a second light emitting diode LED2. The first light emitting diode LED1 may be connected between the second input node 222 and the first light emitting area 220A, and the second light emitting diode LED2 may be connected between the third input node 223 and the second light emitting area 220B.

In the example embodiment of FIG. 14 , when the user desires to obtain light having a color temperature corresponding to an intermediate value between the first color temperature and the second color temperature, light having the color temperature desired by the user can be accurately provided. The user can operate the color temperature controller 230 to connect the output node 211 of the power supply 210 to the second input node 222 and the third input node 223 to obtain light having a color temperature corresponding to an intermediate value between the first color temperature and the second color temperature. . The first light-emitting diode LED1 and the second light-emitting diode LED2 may respectively output light with the same color temperature as the light-emitting diodes respectively included in the first light-emitting area 220A and the second light-emitting area 220B. If necessary, when the output node 211 of the power supply 210 is connected to the second input node 222 and the third input node 223, in order to make the first light-emitting area 220A and the second light-emitting area 220B respectively output light with almost the same brightness, the first light-emitting diode LED1 The number of second light-emitting diodes LED2 can be changed.

Next, referring to FIG. 15 , the balancing circuit 260F may include a first resistor R1 , a second resistor R2 , a first light emitting diode LED1 and a second light emitting diode LED2 . The first resistor R1 and the first light emitting diode LED1 may be connected in series with each other and may be connected between the second input node 222 and the first light emitting region 220A. The second resistor R2 and the second light emitting diode LED2 may be connected in series with each other and may be connected between the third input node 223 and the second light emitting region 220B. When the color temperature controller 230 is connected to the second input node 222 and the third input node 223, the elements R1, R2, LED1 and LED2 included in the balancing circuit 260F may be used to adjust the color temperature of the light output from the light emitting area 220 to have An element with an intermediate value between the first color temperature and the second color temperature. Similar to the embodiment described above with reference to FIG. 14 , the number of the first light emitting diode LED1 and the second light emitting diode LED2 may be changed.

Figure 16 shows another circuit embodiment of a lighting device 300, which may include a power supply 310, a light emitting area 320, a color temperature controller 330, a driver 340, a diode block 350, a balancing circuit 360, and a dimming controller 370.

The operation of the power supply 310, the light emitting area 320, the color temperature controller 330, the driver 340, and the diode block 350 may be similar to other example embodiments described previously. For example, the first light emitting area 320A in the light emitting area 320 may output light of a first color temperature, and the second light emitting area 320B may output light of a second color temperature higher than the first color temperature. The first light emitting area 320A may include a plurality of first light emitting arrays 321A to 324A, and the second light emitting area 320B may include a plurality of second light emitting arrays 321B to 324B.

In the example embodiment shown in FIG. 16 , the balancing circuit 360 may include a first resistor R1 connected to the first light-emitting area 320A and a second resistor R2 connected to the second light-emitting area 320B. The first resistor R1 and the second resistor R2 may be variable resistors, for example. The user can adjust the resistance value of each of the first resistor R1 and the second resistor R2 through the dimming controller 370 .

When the color temperature controller 330 allows the first input node 321 and the second input node 322 to be connected to the output node 311 of the power supply 310, only the first light emitting area 320A is turned on. As a result, light of the first color temperature can be output. When the user uses the dimming controller 370 to adjust the resistance of the first resistor R1, the brightness of the light with the first color temperature output by the first light-emitting area 320A can be adjusted.

When the color temperature controller 330 allows the third input node 323 and the fourth input node 324 to be connected to the output node 311 of the power supply 310, only the second light emitting area 320B is turned on. As a result, light having the second color temperature can be output. When the user uses the dimming controller 370 to adjust the resistance of the second resistor R2, the brightness of the light of the second color temperature output by the second light-emitting area 320B can be adjusted.

When the color temperature controller 330 allows the second input node 322 and the third input node 323 to be connected to the output node 311 of the power supply 310, the first light emitting area 320A and the second light emitting area 320B may be turned on at the same time. When the user uses the dimming controller 370 to adjust the resistance values of the first resistor R1 and the second resistor R2, the color temperature and brightness of the light output by the light-emitting area 320 can be adjusted. In this case, the dimming controller 370 may be used as a user device for independently adjusting the resistance value of each of the first resistor R1 and the second resistor R2.

The methods, processes, and/or operations described herein may be performed by code or instructions to be executed by a computer, processor, controller, or other signal processing device. The computer, processor, controller, or other signal processing device may be one of those described herein or one in addition to the elements described herein. Because the algorithms that form the basis of the method (or the operation of a computer, processor, controller, or other signal processing apparatus) are described in detail, the code or instructions used to implement the operations of the method embodiments may refer to the computer, processor, controller, or other signal processing device. or other signal processing device converted into a dedicated processor for executing the methods herein.

The controllers, drivers, balancing circuits, switching elements, and other signal generating features, signal providing features, and signal processing features of the embodiments disclosed herein may be implemented in non-transient logic, which may include hardware, software, or both, for example. When implemented at least partially in hardware, the controller, drivers, balancing circuits, switching elements, and other signal generating features, signal providing features, and signal processing features may be, for example, any of a variety of integrated circuits, including, but not limited to, special purpose Integrated circuit, field programmable gate array, combination of logic gates, system on chip, microprocessor, or other type of processing or control circuit.

When implemented at least in part in software, controllers, drivers, balancing circuits, switching elements, and other signal generating features, signal providing features, and signal processing features may include, for example, storage devices configured by, for example, a computer, processor, microprocessor, controller or other memory or other storage device for code or instructions to be executed by other signal processing devices. A computer, processor, microprocessor, controller, or other signal processing device may be those described herein or in addition to the elements described herein. Because the algorithms that form the basis of the method (or the operation of a computer, processor, microprocessor, controller, or other signal processing apparatus) are described in detail, the code or instructions used to implement the operations of the method embodiments may be a computer, process processor, controller or other signal processing device into a dedicated processor for performing the methods described herein.

According to one or more example embodiments, the first and second light emitting areas may be used to change the color temperature of light output by the lighting device. The first light-emitting area and the second light-emitting area may have light-emitting elements outputting light of different color temperatures. The color temperature controller may be connected to the input nodes of the first lighting zone and the second lighting zone. In addition, a balancing circuit may be included for compensating for a difference in light output generated when the same driving power is input to each of the first and second light-emitting areas. Therefore, when the user changes the color temperature, the problem of the brightness of the lighting device changing together can be solved regardless of the user's intention.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted in a generic and descriptive sense only and not for purposes of limitation. In some cases, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements of other embodiments, as will be apparent to those skilled in the art upon filing this application. , unless explicitly stated otherwise. Accordingly, various changes in form and details may be made without departing from the spirit and scope of the embodiments as set forth in the claims.

Claims (18)

1. A lighting device, including: A first light-emitting area including a plurality of first light-emitting arrays connected in series, the plurality of first light-emitting arrays outputting light of a first color temperature; The second light-emitting area includes a plurality of second light-emitting arrays connected in series. The second light-emitting area is connected in parallel with the first light-emitting area. The plurality of second light-emitting arrays output different color temperatures from the first color temperature. Light with a second color temperature; a color temperature controller selectively connected to at least one of an input node of the first light-emitting area and an input node of the second light-emitting area, the color temperature controller determining the first light-emitting area and the second light-emitting area The on/off status of the second light-emitting area; and a balancing circuit connected in series to at least one of the first light-emitting area and the second light-emitting area, Wherein, the input node of the first light-emitting area includes a first input node and a second input node, and the input node of the second light-emitting area includes a third input node and a fourth input node. 2. The lighting device of claim 1, wherein the first color temperature is lower than the second color temperature. 3. The lighting device of claim 2, wherein the balancing circuit is connected only between the second light emitting area and the color temperature controller. 4. The lighting device of claim 1, further comprising: A power supply that receives AC power and supplies driving power to the first and second light-emitting areas. 5. The lighting device of claim 4, wherein the color temperature controller includes a switch connecting the at least one of the input node of the first lighting area and the input node of the second lighting area. to the output node of the power supply. 6. The lighting device of claim 1, wherein the balancing circuit includes: a first balancing circuit connected between the second input node and the first light emitting area, and A second balancing circuit is connected between the third input node and the second light-emitting area. 7. The lighting device of claim 6, wherein the first balancing circuit and the second balancing circuit have different impedance values. 8. The lighting device of claim 6, wherein: the first color temperature is lower than the second color temperature, and The impedance value of the first balancing circuit is greater than the impedance value of the second balancing circuit. 9. The lighting device of claim 1, further comprising: a driver that controls an on/off state of each of the plurality of first light-emitting arrays and the plurality of second light-emitting arrays; and a diode block connected to a node between the first light emitting array and a node between the second light emitting array, the diode block blocking current such that the current cannot flow from the driver to the first light-emitting area and the second light-emitting area. 10. The lighting device of claim 9, wherein: The diode block includes a first block of diodes and a second block of diodes, the first block of diodes is connected to a node between the first light emitting arrays, and the second block of diodes is connected to the second block of diodes. nodes between the emitting arrays, and The diodes of the first block and the diodes of the second block are connected in parallel to each other. 11. The lighting device according to claim 10, wherein the driver determines the plurality of first light-emitting arrays and the plurality of first light-emitting arrays according to the magnitude of the driving power input to the first light-emitting area and the second light-emitting area. The number of the light-emitting arrays that have been turned on among the plurality of second light-emitting arrays. 12. The lighting device of claim 1, wherein the balancing circuit includes at least one of a light emitting diode element, a resistor, and a rectifier diode that outputs light with the first color temperature or light with the second color temperature. one. 13. The lighting device according to claim 1, wherein the color temperature controller determines the color temperature of the light output by the first light-emitting area and the second light-emitting area to be between the first color temperature and the second light emitting area. between color temperatures. 14. A lighting device, comprising: substrate; a first light-emitting area including a plurality of first LEDs mounted on the substrate; a second light-emitting area including a plurality of second LEDs mounted on the substrate, the plurality of second LEDs outputting light with a color temperature higher than that of the plurality of first LEDs; a color temperature controller including a user-operable switch by which the color temperature controller determines an on/off state of each of the first light-emitting area and the second light-emitting area; and a balancing circuit connected between the second light-emitting area and the color temperature controller, wherein the balancing circuit includes at least one of a resistor and a diode and has an adjustable impedance value, Wherein, the input node of the first light-emitting area includes a first input node and a second input node, and the input node of the second light-emitting area includes a third input node and a fourth input node. 15. The lighting device of claim 14, further comprising: A driver installed on the substrate determines the connections of the plurality of first LEDs and the plurality of second LEDs according to the magnitude of the driving power input to the first light-emitting area and the second light-emitting area. On/off status. 16. The lighting device of claim 15, wherein the driver and balancing circuit are located in a single package. 17. A lighting device according to claim 14, wherein the balancing circuit includes means for adjusting the impedance value of the balancing circuit. 18. A lighting device, comprising: a first light-emitting area including a plurality of first LEDs outputting light of a first color temperature, the first light-emitting area including a first input node and a second input node; a second light-emitting area that includes a plurality of second LEDs that output light of a second color temperature higher than the first color temperature, the second light-emitting area including a third input node and a fourth input node; a power supply that inputs driving power to at least a portion of the first to fourth input nodes; and A switch connects at least some of the first to fourth input nodes to each other and adjusts the color temperature of the light output by the first and second light-emitting areas.