TW202037231A - Color temperature and luminance tunable light-emitting diode device - Google Patents

Abstract

A color temperature and luminance tunable light-emitting diode device includes a driver, a dimmer connected to the driver, a first light-emitting diode set emitting a light with a first color temperature, a second light-emitting diode set emitting a light with a second color temperature which is different form the first color temperature, a first transistor and a second transistor connected to the driver and controlling the emission of the first light-emitting diode set and the second light-emitting diode set respectively.

Description

Light-emitting diode device with adjustable color temperature and brightness

The present invention relates to a light-emitting diode device with adjustable color temperature and brightness, in particular through the configuration of a driver and a dimmer and the control of a first switching transistor and a second switching transistor to adjust two different color temperatures or colors. A light-emitting diode device with adjustable color temperature and brightness to achieve color temperature and brightness adjustment.

Generally speaking, TRIAC (TRIode for Alternating Current semiconductor switch) or a 0-10V dimmer is usually used to adjust the brightness of the light-emitting diode. TRIAC's dimming method is actually suitable for tungsten filament lamps rather than light-emitting diodes. Therefore, if it is forced to be used for light-emitting diode dimming, the driving circuit is quite complicated, high cost, poor efficiency and poor stability. And many other shortcomings. The 0~10V dimmer actively or passively sends out an analog voltage signal to the driver, and the driver sends a corresponding output current to the LED according to the intensity of the analog voltage signal to adjust the brightness of the LED. However, the aforementioned two configurations only control the light of a single color temperature, and fail to set the color temperature of the light-emitting diode to achieve the effect of multiple colors.

The previous patent of Taiwan Announcement No. I475927 is based on the calculation of the current and the driving of at least two different current drivers respectively, so that the light-emitting diodes with two different phosphors emit different brightness, and the two color temperatures are different. Other brightness, and then accurately mix a variety of color temperatures between these two phosphors, but the multi-current driver is expensive, and most users only need three color temperatures instead of precise color temperatures to meet their needs. There is no description of how to expand the 0~10V dimmer that can only dimming into a technology with both color temperature and brightness adjustment.

In view of the foregoing, the inventor of the present invention considered and designed a light-emitting diode dimmable color system with a 0~10V dimmer or a 1~10V dimmer, in order to improve the lack of conventional technology, and further improve Implementation and utilization in industry.

In view of the above-mentioned conventional problems, the purpose of the present invention is to provide a light-emitting diode device with adjustable color temperature and brightness to solve the problems faced by the conventional technology.

Based on the above objective, the present invention provides a light emitting diode device with adjustable color temperature and brightness, which includes: a power supply terminal, a dimming terminal, a current output terminal, a first control terminal, a second control terminal, and a switch common contact Driver, and the power terminal of the driver is connected to AC power; the gate electrode is connected to the first switching transistor of the first control terminal; the gate electrode is connected to the second switching transistor of the second control terminal; and the dimming terminal of the driver is connected to provide dimming Signal to the driver's dimmer, the driver analyzes the dimming signal and sends an appropriate drive current through the current output terminal, and sends the appropriate first switch control signal and second switch control from the first control terminal and the second control terminal, respectively Signal to the first switching transistor and the second switching transistor; connected between the current output terminal and the first switching transistor, so that the driving current flows out of the first driving current, and based on the first driving current, the first color temperature The first light emitting diode group of light; and is connected between the current output terminal and the second switching transistor, so that the driving current is divided into the second driving current, and based on the second driving current, the first color temperature is different from the first The second light emitting diode group of light of two color temperature, wherein the first switching transistor is connected between the first light emitting diode group and the common contact point of the switch, and the second switching transistor is connected to the second light emitting diode Between the group and the switch common node, and the sum of the first driving current and the second driving current is equal to the driving current.

Preferably, the first switch control signal and the second switch control signal can be digital signals of logic 1 or 0 to control on and off, and the first switch control signal and the second switch control signal can be the same or different .

Preferably, the first light-emitting diode group may have one or more first light-emitting diodes, and the second light-emitting diode group may have one or more second light-emitting diodes.

Preferably, the light emitting diode device with adjustable color temperature and brightness can be selected from the first color temperature, the second color temperature, the first color temperature and the second color temperature through the first switch control signal and the second switch control signal. The light of at least two color temperatures in the group formed by the mixed third color temperature is switched, and the color temperature is switched and the brightness of the color temperature after the switching can be adjusted through a dimmer.

Preferably, the third color temperature can have multiple changes according to the light-emitting ratio of the first light-emitting diode group and the second light-emitting diode group, and the difference between the first light-emitting diode group and the second light-emitting diode group The light-emitting ratio can be adjusted by controlling the conduction time of the first switch transistor and the second switch transistor by the first switch control signal and the second switch control signal.

Preferably, the light-emitting diode device with adjustable color temperature and brightness can switch between at least two color temperatures of the third color temperature with multiple changes through the first switch control signal and the second switch control signal, and the color temperature can be switched And the brightness of the color temperature after switching can be adjusted through the dimmer.

Preferably, a plurality of first light emitting diodes are connected in series or parallel with each other, and a plurality of second light emitting diodes are connected in series or parallel with each other.

Preferably, when the first light-emitting diode group has a plurality of first light-emitting diodes, the plurality of first light-emitting diodes are connected in series and then connected in parallel, and when the second light-emitting diode group has a plurality of second light-emitting diodes, In the case of light emitting diodes, a plurality of second light emitting diodes are connected in series and then connected in parallel.

Preferably, when the first light-emitting diode group has a plurality of first light-emitting diodes, the plurality of first light-emitting diodes are connected in parallel and then connected in series, and when the second light-emitting diode group has a plurality of first light-emitting diodes, In the case of two light emitting diodes, a plurality of second light emitting diodes are connected in parallel and then connected in series.

Preferably, the dimmer can be a 0-10V dimmer or a 1-10V dimmer.

Preferably, the dimmer can be designed to provide a dimming signal by adjusting the variable resistor by rotating or sliding, or by adjusting the voltage level by pressing the button.

Preferably, the first switching transistor and the second switching transistor may both be MOSFETs.

The advantages, features, and technical methods of the present invention will be described in more detail with reference to exemplary embodiments and the accompanying drawings to make it easier to understand, and the present invention can be implemented in different forms, so it should not be understood to be limited to what is here. The stated embodiments, on the contrary, for those with ordinary knowledge in the technical field, the provided embodiments will make this disclosure more thorough, comprehensive and complete to convey the scope of the present invention, and the present invention will only be additional Defined by the scope of the patent application.

Please refer to FIG. 1, which is a block diagram of a light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. As shown in FIG. 1, the light-emitting diode device 1 with adjustable color temperature and brightness according to the embodiment of the present invention includes a driver 10, a dimmer 20, and a light-emitting element 30. When the light-emitting diode device 1 with adjustable color temperature and brightness of the embodiment of the present invention is connected to an external AC power source to provide power to the driver 10, the dimmer 20 can be transmitted by adjusting the resistance included therein or by adjusting the voltage level. The dimming signal DIM with the required voltage is sent to the driver 10. After the driver 10 receives the dimming signal DIM from the dimmer 20, it analyzes the dimming signal DIM and sends the driving current I _drive , the first switch control signal CN1, and The second switch control signal CN2 is sent to the light emitting element 30, the first switching transistor 50 and the second switching transistor 60, so that the light emitting element 30 emits desired light. The AC power supply is an AC power supply with a voltage between 80V and 300V and a frequency between 45Hz and 66Hz. When the AC power supply is connected, the drive 10 may further include an AC-DC conversion circuit to convert the AC power supply into an appropriate DC power supply. The light emitting element 30 is driven. The dimmer 20 can be a conventional 0~10V or 1~10V dimmer, and the dimmer 20 can be designed according to an appropriate human-machine interface (UI), such as rotating or sliding a variable resistor or various buttons to adjust the adjustment The voltage level between 0V and 10V is used as the dimming signal DIM. In one embodiment, the dimmer 20 can be adjusted as needed to generate a dimming signal DIM with a range of 0V to 10V.

The light-emitting element 30 of the light-emitting diode device with adjustable color temperature and brightness according to the embodiment of the present invention may include at least two sets of light-emitting diodes. For ease of explanation, the following embodiments are based on the color temperature that only includes two sets of light-emitting diodes. And the light-emitting diode device with adjustable brightness will be explained. FIG. 2 is an enlarged view of the light-emitting element 30 of the light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. As shown in Figure 2, the light-emitting element 30 includes a first light-emitting diode group composed of one or more first light-emitting diodes 301 connected in series or in parallel, and one or more second light-emitting diodes 302 A second group of light-emitting diodes formed in series or in parallel with each other, and these light-emitting diodes (LEDs) can be laid out regularly or irregularly according to the actual needs and soldered on various substrates, and use the substrate The metal traces are electrically connected to each other. For example, when the first light-emitting diode group has a plurality of first light-emitting diodes 301, the first light-emitting diodes 301 can be connected in parallel and then connected in series, and when the second light-emitting diode group has When there are multiple second light emitting diodes 302, the multiple second light emitting diodes 302 may be connected in parallel and then connected in series. When the light-emitting element 30 receives the driving current I _drive , the first light-emitting diode group can emit light with the first color temperature according to the first driving current I _drive1 shunted from the driving current I _drive , and the second light-emitting diode group can be according to The second driving current I _drive2 shunted from the driving current I _drive emits light having a second color temperature, and the light emitting element 30 can emit light having a second color temperature based on the light emitted by the first light emitting diode group and the second light emitting diode group. The light having the third color temperature is generated by mixing the light having the first color temperature and the light having the second color temperature.

In this embodiment, the first color temperature is different from the second color temperature. The third color temperature may have various changes according to the first driving current I _drive1 and the second driving current I _drive2 , and may be different from the first color temperature or the second color temperature. In detail, when the first driving current I _drive1 and the driving current I _{drive are} substantially the same, the second driving current I _drive2 is substantially 0. At this time, the second light-emitting diode group does not emit light and the light-emitting element 30 emits light. Light of the first color temperature; when the second drive current I _drive2 and the drive current I _{drive are} substantially the same, the first drive current I _drive1 is substantially 0, and the first light-emitting diode group does not emit light at this time, and the light-emitting element 30 emits Light having a second color temperature; and when the first driving current I _drive1 and the second driving current I _{drive2 are} substantially different from the driving current I _drive , the first light emitting diode group emits light having the first color temperature, The two light emitting diode groups emit light having a second color temperature, and the light emitting element 30 emits light having a third color temperature generated by mixing light having the first color temperature and light having the second color temperature. The first driving current I _drive1 and the second driving current I _drive2 can be adjusted according to the first switch control signal CN1 and the second switch control signal CN2. The detailed description is described below with reference to FIG. 3.

Figure 3 is a schematic diagram of a light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. As shown in FIG. 3, the light-emitting diode dimmable color system of the present invention includes a driver 10, a dimmer 20, and a light-emitting element 30. The light emitting element 30 includes a first light emitting diode group composed of one or more first light emitting diodes 301, a second light emitting diode group composed of one or more second light emitting diodes 302, and a second light emitting diode group composed of one or more second light emitting diodes 302. A switching transistor 50 and a second switching transistor 60. The driver 10 has a power terminal 11, a dimming terminal 12, a current output terminal 13, a first control terminal 14, a second control terminal 15, and a switch common contact 16, wherein the power terminal 11 is connected to an AC power source, and the dimming terminal 12 is connected to dimming The current output terminal 13 is connected to the first light emitting diode group and the second light emitting diode group, the first control terminal 14 is connected to the gate electrode of the first switching transistor 50, and the second control terminal 15 is connected to the second switch The gate electrode of the transistor 60 and the switch common contact 16 are respectively connected to the first light emitting diode group and the second light emitting diode group through the first switching transistor 50 and the second switching transistor 60. The first switching transistor 50 and the second switching transistor 60 may be the same MOSFETs. In one embodiment, the first switching transistor 50 and the second switching transistor 60 may have extremely high current gain values so as to be used as switches.

When the AC power supply provides power to the driver 10, the driver 10 receives the dimming signal DIM from the dimming terminal 12, and then analyzes the dimming signal DIM, and sends an appropriate driving current I _drive through the current output terminal 13 respectively, and from the first control The terminal 14 and the second control terminal 15 send the appropriate first switching control signal CN1 and the second switching control signal CN2 to the first switching transistor 50 and the second switching transistor 60. In one embodiment, the first switch control signal CN1 and the second switch control signal CN2 may be digital signals of logic 1 or 0. When the first switch control signal CN1 of logic 1 is transmitted to the first switching transistor 50, The first switching transistor 50 is turned on, and when the first switching control signal CN1 with logic 0 is transmitted to the first switching transistor 50, the first switching transistor 50 is not turned on. Similarly, when the second switching control signal CN2 with logic 1 is transmitted to the second switching transistor 60, the second switching transistor 60 is turned on, and when the logic is 0, the second switching control signal CN2 is transmitted to the second switching transistor 60. When the crystal 60 is used, the second switching transistor 60 is not conductive.

When the first switching transistor 50 is not conducting, the circuit is disconnected at the first switching transistor 50 to form an open circuit, so that the first driving current I _drive1 is substantially zero, and the second driving current I _drive2 and the driving current I _{drive are} substantially zero. The above is the same, the first light-emitting diode group does not emit light, and the light-emitting element 30 emits light having the second color temperature. When the second switching transistor 60 is not conducting, the circuit is disconnected at the second switching transistor 60 to form an open circuit, so that the second driving current I _drive2 is substantially zero, and the first driving current I _drive1 and the driving current I _{drive are} substantially zero. The above is the same, the second light emitting diode group does not emit light, and the light emitting element 30 emits light having the first color temperature. When the first switching transistor 50 and the second switching transistor 60 are both turned on, the driving current I _{drive is} divided into a first driving current I _drive1 and a second driving current I _drive2 , the first light-emitting diode group and the second light-emitting diode The polar body sets respectively emit light having a first color temperature and a second color temperature according to the first driving current I _drive1 and the second driving current I _drive2, and the light-emitting element 30 emits light generated by a mixture of light having the first color temperature and the second color temperature. Light with a third color temperature.

In one embodiment, the light-emitting ratio between the first light-emitting diode group and the second light-emitting diode group can be changed by adjusting the conduction time of the first switching transistor 50 and the second switching transistor 60. For example, by adjusting the length of time the first switch control signal CN1 with logic 1 is transmitted to the first switching transistor 50 and the length of time the second switch control signal CN2 with logic 1 is transmitted to the second switching transistor 60, The first switching transistor 50 and the conduction time of the second switching transistor 60 can be adjusted, so as to change the light-emitting ratio between the first light-emitting diode group and the second light-emitting diode group.

In another embodiment, when the first light emitting diode group includes a plurality of first light emitting diodes and the second light emitting diode group includes a plurality of second light emitting diodes, the first light emitting diode group The light-emitting ratio between the second light-emitting diode group and the second light-emitting diode group can be changed by adjusting the light-emitting quantity ratio between the first light-emitting diode and the second light-emitting diode. For example, when the first light emitting diode group includes 10 first light emitting diodes and the second light emitting diode group includes 10 second light emitting diodes, the 10 first light emitting diodes can be Body and 5 second light-emitting diodes, or make 3 first light-emitting diodes and 5 second light-emitting diodes emit light, etc. to adjust the first light-emitting diode group and the second light-emitting diode group to each other The luminous ratio between.

Since the first color temperature is different from the second color temperature, when the light emitting ratio between the first light emitting diode group emitting light having the first color temperature and the second light emitting diode group emitting light having the second color temperature changes with each other , The light of the third color temperature will have many changes with the change of the luminous ratio. In other words, the third color temperature can be further divided into the first light-emitting diode group and the second light-emitting diode group according to the light-emitting ratio between the first light-emitting diode group and the second light-emitting diode group. The luminous ratio is 1:1, the first type of third color temperature, the first light-emitting diode group and the second light-emitting diode group have a luminous ratio of 3:2, the second type, third color temperature... etc. Color temperature.

Accordingly, the light-emitting diode device with adjustable color temperature and brightness of the present invention can emit light with at least two color temperatures. In one embodiment, the light-emitting diode device with adjustable color temperature and brightness of the present invention can emit a first color temperature, a second color temperature, a first third color temperature, a second third color temperature, and a third third color temperature. Wait for six colors of light. In another embodiment, the light-emitting diode device with adjustable color temperature and brightness of the present invention can emit light of three colors: the first color temperature, the second color temperature, and the first third color temperature. In yet another embodiment, the light-emitting diode device with adjustable color temperature and brightness of the present invention can emit light of two colors, the first third color temperature and the second third color temperature. In yet another embodiment, the light emitting diode device with adjustable color temperature and brightness of the present invention can emit light of two colors, the first color temperature and the first third color temperature. After the color temperature is switched and the brightness of the color temperature can be adjusted by a dimmer, according to this, the light emitting diode device with adjustable color temperature and brightness of the present invention can provide light of at least two color temperatures, and each color temperature The brightness can be adjusted.

Specifically, the light-emitting element 30 of the present invention can mix warm white light with a color temperature between 3000K and 6500K through the combination of a first light-emitting diode group emitting a color temperature of 3000K and a second light-emitting diode group emitting a color temperature of 6500K. For example, the first light emitting diode 301 of the first light emitting diode group can be made to emit white light, and the second light emitting diode 302 of the second light emitting diode group can emit yellow light. In the range, the light-emitting element 30 can emit warm white light by turning on the first switching transistor 50 and the second switching transistor 60, and the conduction time of the first switching transistor 50 and the second switching transistor 60 can also be fine-tuned. To adjust the color temperature ratio of the first light-emitting diode group and the second light-emitting diode group, so that the light-emitting element 30 emits warm white light with color temperature setting flexibility, for example, set any color temperature between 3000K and 6500K. Of course, it is also possible to make the light emitting element 30 emit a mixed light color such as red light, blue light or green light according to the needs of the user, but there is no limitation to only emitting white and yellow light.

The following 4 figures further illustrate the relationship between the color temperature, brightness, and dimming signal voltage of the light emitting diode device with adjustable color temperature and brightness of the present invention. Figure 4 is a diagram showing the relationship between the brightness of the three color temperatures and the dimming signal voltage of a light emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. In this embodiment, the maximum mixed total luminance that the light-emitting element 30 can emit is set as 100% luminance, and the mixed total luminance when the light-emitting element 30 does not emit light is set as 0% luminance. As shown in Figure 4, the dimmer 20 can generate a dimming signal DIM of 0-10V. When the voltage V _DIM of the dimming signal DIM generated by the dimmer 20 is 0V and 6.6V, the first light-emitting diode Neither the body group nor the second light emitting diode group emits light, and the brightness emitted by the light emitting element 30 is 0% brightness. When 0V ≤ V _DIM ＜3.3 V, the first light-emitting diode group starts to emit light and the second light-emitting diode group remains non-luminous, and the brightness emitted by the light-emitting element 30 gradually changes from 0% brightness to approximately 100% brightness. Light of the first color temperature; when V _{DIM is} slightly higher than 3.3V, the first light-emitting diode group does not emit light and the second light-emitting diode group emits light, and the light-emitting element 30 emits light with the second color temperature and the total mixed brightness is still maintained For the light close to 100% brightness, the brightness gradually decreases to 0% when 3.3V <V _DIM ≤6.6 V; and when V _{DIM is} slightly higher than 6.6V, the first light-emitting diode group and the second light-emitting diode The polar body groups all emit light, and the mixed brightness emitted by the light-emitting element 30 is close to 0% brightness. In the case of 6.6V <V _DIM ≤10 V, both the first light-emitting diode group and the second light-emitting diode group emit light. At this time, the light-emitting element 30 emits light that is different from the first color temperature and the second color temperature. The mixed brightness of the light with the same third color temperature and the light with the third color temperature emitted by the light emitting element 30 gradually increases from 0% brightness to about 100% brightness. It can be further seen from FIG. 4 that in this embodiment, the V _DIM and the percentage of the brightness of the light emitted by the light-emitting element 30 have a linear relationship. In another embodiment, the mixed brightness and dimming voltage V _DIM can also be any nonlinear curve, or there can be only two color temperature switching, and the threshold voltage of the color temperature switching V _DIM is not necessarily 3.3V or 6.6V.

Figure 5 is a diagram showing the relationship between the brightness of two color temperatures and the dimming signal voltage of a light emitting diode device with adjustable color temperature and brightness according to another embodiment of the present invention. In this embodiment, the maximum mixed total luminance that the light-emitting element 30 can emit is set as 100% luminance, and the mixed total luminance when the light-emitting element 30 does not emit light is set as 0% luminance. As shown in Figure 5, the dimmer 20 can generate a dimming signal DIM of 0-10V. When the voltage V _DIM of the dimming signal DIM generated by the dimmer 20 is 0V and 10V, the first light-emitting diode Neither the light-emitting diode group nor the second light-emitting diode group emits light, and the brightness emitted by the light-emitting element 30 is 0% brightness. When 0V ≤ V _DIM <5.5V, the first light-emitting diode group starts to emit light and the second light-emitting diode group remains non-luminous, and the mixed brightness emitted by the light-emitting element 30 gradually changes from 0% brightness to approximately 100% brightness. Under this condition, since the second light-emitting diode group does not emit light, the light-emitting element 30 emits light having the first color temperature. When V _{DIM is} slightly higher than 5.5V, the first light-emitting diode group and the second light-emitting diode group emit light at a luminous ratio of 1:1, that is to say, at this time, the light-emitting element 30 emits light with the first color temperature and The second color temperature is mixed to form the third color temperature light, and the total mixed brightness is still maintained at 100% brightness, and the brightness gradually decreases to 0 when 5.5V <V _DIM ≤ 10V.

In summary, the light-emitting diode device with adjustable color temperature and brightness of the present invention emits a first light-emitting diode group with a first color temperature and a second light-emitting diode with a second color temperature through the dimmer 20 The configuration of the body set, the first switching transistor 50 and the second switching transistor 60 is adjusted by the setting of the dimmer 20 to adjust the conduction time of the first switching transistor 50 and the second switching transistor 60 so that the flow through the The current I _{drive1 of} a light-emitting diode group is the same as or different from the current I _drive2 flowing through the second light-emitting diode group, so that the brightness of the first light-emitting diode group and the brightness of the second light-emitting diode group are the same Or different, and can produce at least two or more color temperatures, or set various colors of light.

The above description is only illustrative, and not restrictive. Any equivalent modifications or alterations that do not depart from the spirit and scope of the present invention should be included in the scope of the attached patent application.

1: Light-emitting diode device 10: Driver 11: Power supply terminal 12: Dimming terminal 13: Current output terminal 14: First control terminal 15: Second control terminal 16: Switch common contact 20: Dimmer 30: Light emitting Element 301: first light-emitting diode 302: second light-emitting diode 50: first switching transistor 60: second switching transistor CN1: first switch control signal CN2: second switch control signal I _drive : drive current I _drive1 : first drive current I _drive2 : second drive current DIM: dimming signal

Figure 1 is a block diagram of a light emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention.

FIG. 2 is a layout diagram of light-emitting elements of a light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention.

Figure 3 is a block diagram of a light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention.

FIG. 4 is a diagram showing the relationship between the brightness of the three color temperatures and the dimming signal voltage of a light emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention.

Figure 5 is a diagram showing the relationship between the brightness of two color temperatures and the dimming signal voltage of a light emitting diode device with adjustable color temperature and brightness according to another embodiment of the present invention.

1: Light-emitting diode device

10: Drive

11: Power end

12: Dimming end

13: Current output terminal

14: The first control terminal

15: second control terminal

16: Switch common contact

20: dimmer

30: Light-emitting element

301: The first light-emitting diode

302: second light emitting diode

50: The first switching transistor

60: second switching transistor

CN1: The first switch control signal

CN2: The second switch control signal

I _drive : drive current

I _drive1 : first drive current

I _drive2 : second drive current

DIM: dimming signal

Claims (10)

A light-emitting diode device with adjustable color temperature and brightness, comprising: A driver having a power terminal, a dimming terminal, a current output terminal, a first control terminal, a second control terminal and a switch common contact, and the power terminal is connected to an AC power supply; A first switching transistor, the gate electrode of which is connected to the first control terminal; A second switching transistor, the gate electrode of which is connected to the second control terminal; A dimmer is connected to the dimming terminal to provide a dimming signal to the driver. After analyzing the dimming signal, the driver sends a driving current from the current output terminal, and then respectively from the first control terminal and the The second control terminal sends a first switch control signal and a second switch control signal to the first switch transistor and the second switch transistor; A first light-emitting diode group is connected between the current output terminal and the first switching transistor, so that the driving current is divided into a first driving current, and based on the first driving current, it has a first color temperature The light; and A second light-emitting diode group is connected between the current output terminal and the second switching transistor, so that the driving current is divided into a second driving current, and based on the second driving current, it is different from the first One color temperature and one second color temperature light; The first switch transistor is connected between the first light emitting diode group and the common contact point of the switch, The second switch transistor is connected between the second group of light-emitting diodes and the common node of the switch, and The sum of the first driving current and the second driving current is equal to the driving current. For example, the light-emitting diode device with adjustable color temperature and brightness described in item 1 of the scope of patent application, wherein the first switch control signal and the second switch control signal are digital signals of logic 1 or 0 to control on and off, And the first switch control signal and the second switch control signal are the same or different. The light-emitting diode device with adjustable color temperature and brightness as described in item 2 of the scope of patent application, wherein the first light-emitting diode group has one or more first light-emitting diodes, and the second light-emitting diode The body group has one or more second light emitting diodes. The light-emitting diode device with adjustable color temperature and brightness as described in item 3 of the scope of patent application, wherein the light-emitting diode device with adjustable color temperature and brightness is controlled by the first switch control signal and the second switch control signal Switching between light having at least two color temperatures selected from the group consisting of the first color temperature, the second color temperature, and a third color temperature formed by a mixture of the first color temperature and the second color temperature, And the color temperature switch and the brightness of the color temperature after the switch are adjusted through the dimmer. The light-emitting diode device with adjustable color temperature and brightness as described in item 4 of the scope of patent application, wherein the third color temperature is based on the light-emitting ratio of the first light-emitting diode group and the second light-emitting diode group A plurality of changes, and the light-emitting ratio of the first light-emitting diode group and the second light-emitting diode group is controlled by the first switch control signal and the second switch control signal by controlling the first switch transistor and The on-time of the second switching transistor is adjusted. For example, the light-emitting diode device with adjustable color temperature and brightness described in item 5 of the scope of patent application, wherein the light-emitting diode device with adjustable color temperature and brightness transmits the first switch control signal and the second switch control signal to Switching between at least two color temperatures in the third color temperature with a plurality of changes, and the switching of the color temperature and the brightness of the color temperature after the switching are adjusted through the dimmer. The light-emitting diode device with adjustable color temperature and brightness as described in item 3 of the scope of patent application, wherein a plurality of the first light-emitting diodes are connected in series or parallel, and a plurality of the second light-emitting diodes are connected in series or in parallel. The light-emitting diode device with adjustable color temperature and brightness as described in item 1 of the scope of patent application, wherein the dimmer is a 0-10V dimmer or a 1-10V dimmer. Such as the light-emitting diode device with adjustable color temperature and brightness as described in item 1 of the scope of patent application, wherein the dimmer is designed according to the appropriate man-machine interface, and the variable resistance is adjusted by rotating or sliding or by pressing the button. The voltage level is adjusted in a manner to provide the dimming signal. The light-emitting diode device with adjustable color temperature and brightness as described in item 1 of the scope of patent application, wherein the first switching transistor and the second switching transistor are MOSFETs.

Images