TWI676403B - Color temperature and luminance tunable light-emitting diode device - Google Patents

Abstract

The invention relates to a light emitting diode device with adjustable color temperature and brightness, which comprises a driver, a dimmer connected to the driver, a first light emitting diode group having a first color temperature, and a light emitting diode device having a color temperature different from the first color temperature. A second light-emitting diode group of two color temperatures, a first switching transistor and a second switching transistor that are connected to a driver and control the first and second light-emitting diode groups to emit light, respectively.

Description

Light emitting diode device with adjustable color temperature and brightness

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

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

The pre-patent case of Taiwan Bulletin No. I475927 is that after current calculation, each driver is driven by at least two different currents to make the light-emitting diodes with two different phosphors emit different brightness. Other brightness, and then accurately mix various kinds between these two phosphors Color temperature, but the multi-current driver is expensive, and most users only need three color temperatures to meet the needs without precise color temperature. The previous case did not describe how to expand the 0 ~ 10V dimmer that can only adjust the light into a With color temperature and brightness adjustment technology.

In summary, the inventors of the present invention have 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 Industrial utilization.

In view of the above known problems, an object of the present invention is to provide a light emitting diode device with adjustable color temperature and brightness to solve the problems faced in the conventional technology.

Based on the above objectives, the present invention provides a light emitting diode device with adjustable color temperature and brightness, which includes: a power source terminal, a dimming terminal, a current output terminal, a first control terminal, a second control terminal, and a switch common contact point; The driver, and the driver's power terminal is connected to AC power; the gate electrode is connected to the first switching transistor at the first control terminal; the gate electrode is connected to the second switching transistor at the second control terminal; connected to the dimming terminal of the driver to provide dimming The signal is sent to the driver's dimmer. After the driver analyzes the dimming signal, the driver sends the appropriate driving current through the current output terminal, and sends the appropriate first switch control signal and the second switch control from the first control terminal and the second control terminal, respectively. A signal to the first switching transistor and the second switching transistor; connected between the current output terminal and the first switching transistor to drive the driving current out of the first driving current, and based on the first driving current, a The first light-emitting diode group of light; and connected between the current output terminal and the second switching transistor, so that the driving current flows out of the second driving Flow, and emits a second color temperature different from the first color temperature based on a second driving current of the second light emitting diode groups, wherein the first switching transistor connected to the first light emitting diode group and the Between the switch common contacts, a second switching transistor is connected between the second light emitting diode group and the switch common node, and the first driving current and the second driving current are equal to the driving current in total.

Preferably, the first switch control signal and the second switch control signal may 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 may 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 controlled by a first switch control signal and a second switch control signal. The mixed third color temperature is used to switch between at least two color temperature lights, and the color temperature is switched and the brightness of the color temperature can be adjusted by a dimmer.

Preferably, the third color temperature can be changed in multiple ways according to the light-emitting ratio of the first light-emitting diode group and the second light-emitting diode group. The light emission ratio can be adjusted by controlling the on time of the first switching transistor and the second switching 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 in the third color temperature with multiple changes through the first switch control signal and the second switch control signal, and the color temperature is switched. And the brightness of this color temperature can be adjusted through the dimmer after switching.

Preferably, the plurality of first light emitting diodes are connected in series or in parallel with each other, and the plurality of second light emitting diodes are connected in series or in 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 with each other 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 a light emitting diode, a plurality of second light emitting diodes are connected in series with each other 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 with each other and then connected in series, and when the second light emitting diode group has a plurality of first light emitting diodes, For a two-light-emitting diode, a plurality of second light-emitting diodes are connected in parallel with each other and then connected in series.

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

Preferably, the dimmer can be adjusted according to an appropriate human-machine interface, and the variable resistance can be adjusted by turning or sliding, or the voltage level can be adjusted by pressing keys to provide a dimming signal.

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

1‧‧‧light-emitting diode device

10‧‧‧Drive

11‧‧‧Power side

12‧‧‧Dimmer

13‧‧‧Current output terminal

14‧‧‧ the 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‧‧‧The first switching transistor

60‧‧‧Second Switching Transistor

CN1‧‧‧First switch control signal

CN2‧‧‧Second switch control signal

I _drive ‧‧‧ drive current

I _drive1 ‧‧‧ the first drive current

I _drive2 ‧‧‧second drive current

DIM‧‧‧Dimming signal

FIG. 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 a light emitting element of a light emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention.

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

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

The advantages, features, and technical methods of the present invention will be described in more detail with reference to the exemplary embodiments and the accompanying drawings to make it easier to understand, and the present invention may be implemented in different forms, so it should not be understood that it is limited to what is described here. The embodiments described are, to the contrary, for those having ordinary knowledge in the technical field, the embodiments provided will make this disclosure more thoroughly, comprehensively and completely convey the scope of the present invention, and the present invention will only be additional As defined by the scope of 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 according to 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 contained therein or by adjusting the voltage level. The dimming signal DIM with the required voltage is sent to the driver 10. After receiving the dimming signal DIM from the dimmer 20, the driver 10 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 reaches 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 source is an AC power source with a voltage between 80V and 300V and a frequency between 45Hz and 66Hz. When the AC power source is connected, the driver 10 may further include an AC-DC conversion circuit to convert the AC power source into an appropriate DC power source. 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 turning or sliding a variable resistor or various keys to adjust the adjustment. The voltage level between 0V and 10V is used as the dimming signal DIM. In an embodiment, the dimmer 20 may be adjusted as needed to generate a dimming signal DIM having a voltage between 0V and 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, each of the following embodiments uses only two sets of color temperatures of the light-emitting diodes. And a dimmable light emitting diode device is explained. FIG. 2 is an enlarged view of a light-emitting element 30 of a light-emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. As shown in FIG. 2, the light-emitting element 30 includes a first light-emitting diode group consisting of one or more first light-emitting diodes 301 connected in series or in parallel with each other, and one or more second light-emitting diodes 302. A second light-emitting diode group formed in series or in parallel with each other, and these light-emitting diodes (LEDs) can be arranged regularly or irregularly according to the actual situation and soldered on various substrates, and the substrates are used The metal traces on 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 may be connected in parallel with each other and then connected in series, and when the second light-emitting diode group has When there are a plurality of second light emitting diodes 302, the plurality of second light emitting diodes 302 may be connected in parallel with each other and then connected in series. When the light emitting element 30 receives the driving current I _drive, a first set of light-emitting diode according to the drive current I _drive from the first drive current shunt I _drive1 emits light having a first color temperature, a second set of light-emitting diode 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. Light of a first color temperature is mixed with light of a second color temperature to generate light of a third 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, and at this time, the second light emitting diode group does not emit light, and the light emitting element 30 has Light at a first color temperature; when the second driving current I _drive2 and the driving current I _{drive are} substantially the same, the first driving current I _drive1 is substantially 0, and at this time, the first light emitting diode group does not emit light, 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 group emits light having a second color temperature, and the light-emitting element 30 emits light having a third color temperature generated by mixing light having a first color temperature and light having a 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 specific description thereof is described below with reference to FIG. 3.

FIG. 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 consisting of one or more first light-emitting diodes 301, a second light-emitting diode group consisting 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. The power terminal 11 is connected to an AC power source, and the dimming terminal 12 is connected to dimming. Device 20, 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 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, respectively. The first switching transistor 50 and the second switching transistor 60 may be metal-Oxide-Semiconductor field effect transistor (MOSFET), which are the same as each other. In one embodiment, the first switching transistor 50 and the second switching transistor 60 may have extremely high current gain values for use as switches.

When AC power is supplied 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 then sends the appropriate driving current I _drive through the current output terminal 13 and controls The terminal 14 and the second control terminal 15 send appropriate first switching control signals CN1 and second switching control signals 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 with logic 1 is transmitted to the first switch 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 second switching control signal CN2 with logic 0 is transmitted to the second switching transistor 60 In the case of the crystal 60, the second switching transistor 60 is not turned on.

When the first switching transistor 50 is not conducting, the circuit is opened at the first switching transistor 50 to form an open circuit, so that the first driving current I _drive1 is substantially 0, the second driving current I _drive2 and the driving current I _{drive are} substantially Same as above, the first light-emitting diode group does not emit light, and the light-emitting element 30 emits light having a second color temperature. When the second switching transistor 60 is not conducting, the circuit is opened at the second switching transistor 60 to form an open circuit, so that the second driving current I _drive2 is substantially 0, and the first driving current I _drive1 and the driving current I _{drive are} substantially Same as above, the second light-emitting diode group does not emit light, and the light-emitting element 30 emits light having a first color temperature. When both the first switching transistor 50 and the second switching transistor 60 are turned on, the driving current I _{drive is} shunted 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 2 The polar body group emits 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 respectively, and the light emitting element 30 emits light generated by mixing the 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 on-time of the first switching transistor 50 and the second switching transistor 60. For example, the first switch control signal CN1 is transmitted to the first switch transistor through the adjustment logic 1. The time length of the body 50 and the time length of the second switch control signal CN2 with logic 1 transmitted to the second switch transistor 60 can be adjusted to change the on time of the first switch transistor 50 and the second switch transistor 60, thereby changing Luminescence 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 emission ratio between the second light emitting diode group and the second light emitting diode group can be changed by adjusting the light emission 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, 10 first light-emitting diodes can be transmitted through To adjust the first light emitting diode group and the second light emitting diode group to each other, or to make three first light emitting diodes and five second light emitting diodes to emit light, etc. Inter-lighting ratio.

Since the first color temperature is different from the second color temperature, when the light emission 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 is changed, The light of the third color temperature will have various changes as the light emission ratio changes. That is, the third color temperature can be further divided into the first light-emitting diode group and the second light-emitting diode group based on the light-emitting ratio between the first light-emitting diode group and the second light-emitting diode group. The first third color temperature between the light emission ratio of 1: 1, the second third color temperature between the first light emitting diode group and the second light emitting diode group is 3: 2, the second color temperature ... Wait for a variety of color temperatures.

According to this, the light emitting diode device with adjustable color temperature and brightness of the present invention can emit light of 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 color temperature and brightness adjustable light emitting diode device of the present invention is The device can emit light of three colors, such as a first color temperature, a second color temperature, and a first third color temperature. In another embodiment, the light emitting diode device with adjustable color temperature and brightness of the present invention can emit two colors of light, such as a first third color temperature and a second third color temperature. In another embodiment, the light emitting diode device with adjustable color temperature and brightness of the present invention can emit light of two colors, such as a first color temperature and a first third color temperature. The above color temperature switching 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 according to the present invention can provide light of at least two color temperatures, and each of the color temperature Brightness can be adjusted.

Specifically, the light-emitting element 30 of the present invention can mix warm white light with a temperature between 3000K and 6500K through the combination of the first light-emitting diode group emitting a color temperature of 3000K and the 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 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 the conduction of the first switching transistor 50 and the second switching transistor 60, and the on-time of the first switching transistor 50 and the second switching transistor 60 can 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, such as setting any color temperature between 3000K and 6500K. Of course, the light-emitting element 30 can also emit light colors such as a mixture of red, blue, or green light according to the needs of the user, but it is not limited to only emitting white and yellow light.

V_DIM<3.3V時，第一發光二極體組開始發光且第二發光二極體組維持不發光，發光元件30發出的亮度由0%亮度開始逐漸變大致100%亮度的具有第一色溫的光；當V_DIM略高於3.3V時，第一發光二極體組不發光而第二發光二極體組發光，發光元件30發出的具有第二色溫且混合總亮度仍維持為接近100%亮度的光，在3.3V<V_DIM

6.6V之間亮度逐漸漸低至0%；而當V_DIM略高於6.6V時，第一發光二極體組及第二發光二極體組皆發光，且發光元件30發出的混合亮度為接近0%亮度的微亮。在6.6V<V_DIM

10V的情況下，第一發光二極體組及第二發光二極體組皆發光，此時發光元件30發出的是具有與第一色溫及第二色溫皆不相同之第三色溫的光，且發光元件30發出的具有第三色溫的光的混合亮度由0%亮度開始逐漸變大至約100%亮度。從第4圖可以進一步看出在此實施例中，V_DIM和發光元件30發出的光的亮度的百分比呈線性關係。在另外的實施例中，混合亮度與調光電壓V_DIM也可為任何非線性曲線，也可只有兩種色溫切換，色溫切換V_DIM的門檻電壓也不一定是3.3V或6.6V。 Next, the relationship between the color temperature and brightness of the light-emitting diode device with adjustable color temperature and brightness of the present invention and the dimming signal voltage will be further described with reference to FIG. 4. FIG. 4 is a diagram showing the relationship between the brightness and the dimming signal voltage of the three color temperatures of the light emitting diode device with adjustable color temperature and brightness according to an embodiment of the present invention. In this embodiment, the maximum total mixed brightness that can be emitted by the light emitting element 30 is set to 100% brightness, and the total mixed brightness when the light emitting element 30 does not emit light is set to 0% brightness. As shown in FIG. 4, the dimmer 20 may generate a dimming signal DIM having 0 to 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

When V _DIM <3.3V, the first light-emitting diode group starts to emit light and the second light-emitting diode group maintains no light, and the brightness emitted by the light-emitting element 30 gradually changes from 0% brightness to approximately 100% brightness with a 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. The light-emitting element 30 has a second color temperature and the total mixed brightness is still maintained close to 100. % Brightness light at 3.3V <V _DIM

The brightness gradually decreases to 0% between 6.6V; and when V _{DIM is} slightly higher than 6.6V, both the first light-emitting diode group and the second light-emitting diode group emit light, and the mixed brightness emitted by the light-emitting element 30 is Slightly near 0% brightness. At 6.6V <V _DIM

In the case of 10V, 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 having a third color temperature different from the first color temperature and the second color temperature. And the mixed brightness of the light having 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 may also be any non-linear curve, and there may be only two color temperature switching, and the threshold voltage of the color temperature switching V _DIM may not be 3.3V or 6.6V.

V_DIM<5.5V時，第一發光二極體組開始發光且第二發光二極體組維持不發光，發 光元件30發出的混合亮度由0%亮度開始逐漸變大致100%亮度。於此條件下，由於第二發光二極體組不發光，發光元件30發出具有第一色溫的光。當V_DIM略高於5.5V時，第一發光二極體組與第二發光二極體組以1：1的發光比例發光，也就是說，此時發光元件30發出具有經由第一色溫與第二色溫混和而成之第三色溫的光，且混合總亮度仍維持為100%亮度，在5.5V<V_DIM

10V之間亮度逐漸漸低至0。 FIG. 5 is a relationship diagram between two color temperature brightness and dimming signal voltages 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 total mixed brightness that can be emitted by the light emitting element 30 is set to 100% brightness, and the total mixed brightness when the light emitting element 30 does not emit light is set to 0% brightness. As shown in FIG. 5, the dimmer 20 may generate a dimming signal DIM having 0 to 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 LED group nor the second LED group emits light, and the luminance emitted by the light-emitting element 30 is 0%. When 0V

When V _DIM <5.5V, the first light-emitting diode group starts to emit light and the second light-emitting diode group maintains no light, and the mixed brightness emitted by the light-emitting element 30 gradually starts to change to approximately 100% brightness from 0% brightness. Under this condition, since the second light-emitting diode group does not emit light, the light-emitting element 30 emits light having a 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 light emission ratio of 1: 1, that is, at this time, the light emitting element 30 emits The light of the third color temperature mixed with the second color temperature, and the total brightness of the mixture is still maintained at 100% brightness, at 5.5V <V _DIM

The brightness gradually decreases to 0 between 10V.

In summary, the light emitting diode device with adjustable color temperature and brightness of the present invention transmits the first light emitting diode group having the first color temperature and the second light emitting diode having the second color temperature through the dimmer 20. The settings of the body group, the first switching transistor 50 and the second switching transistor 60 are 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 to flow through the first The current I _{drive1 of} one 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 is the same as that of the second light-emitting diode group. Or different, and can produce at least two or more color temperatures, or set various colors of light.

The above description is exemplary only, and not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the attached patent application.

Claims (9)

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 in common Point, and the power terminal is connected to an AC power source; a first switching transistor whose gate electrode is connected to the first control terminal; a second switching transistor whose gate electrode is connected to the second control terminal; a dimming And a dimming terminal connected to the dimming terminal to provide a dimming signal to the driver. After the driver analyzes the dimming signal, the driver sends a driving current from the current output terminal and sends the driving current from the first control terminal and the second control respectively The terminal sends a first switch control signal and a second switch control signal to the first switch transistor and the second switch transistor, wherein the dimmer is a 0-10V dimmer or a 1-10V dimmer, And the dimmer uses a variable resistor to regulate the dimming signal, and the dimmer has a non-luminous voltage between 0V and 10V corresponding to a zero dimming signal; a first light emitting Diode set connected to this current output Between the first switching transistor, the driving current is divided into a first driving current, and a light having a first color temperature is emitted based on the first driving current, wherein the first switching transistor is connected to the first light emitting diode. Between the diode group and the common contact point of the switch; and a second light-emitting diode group connected between the current output terminal and the second switching transistor, so that the driving current flows out of a second driving current And emitting light having a second color temperature different from the first color temperature based on the second driving current, wherein the second switching transistor is connected between the second light emitting diode group and a common node of the switch, and The sum of the first driving current and the second driving current is equal to the driving current. According to 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 switch control signal and the second switch control signal are digital signals of logic 1 or 0 to control on and off, The first switch control signal and the second switch control signal are the same or different. The color temperature and brightness adjustable light emitting diode device according to item 2 of the scope of patent application, wherein the first light emitting diode group has one or a plurality of first light emitting diodes, and the second light emitting diodes 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 at 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 mixed with the first color temperature and the second color temperature, And the color temperature is switched and the brightness of the color temperature is adjusted through the dimmer. According to the light emitting diode device with adjustable color temperature and brightness as described in item 4 of the scope of the patent application, the third color temperature is determined by the light emitting ratio of the first light emitting diode group and the second light emitting diode group. Multiple variations, 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. The light emitting diode device with adjustable color temperature and brightness as described in item 5 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 at The third color temperature having a plurality of changes is switched between at least two color temperatures, and the color temperature switching and the brightness of the color temperature after the switching are all adjusted by the dimmer. According to the light emitting diode device with adjustable color temperature and brightness according to item 3 of the scope of patent application, wherein a plurality of the first light emitting diodes are connected in series or in parallel with each other, and a plurality of the second light emitting diodes are connected in series or with each other in parallel. The light-emitting diode device with adjustable color temperature and brightness as described in item 1 of the scope of the patent application, wherein the dimmer is based on an appropriate human-machine interface design, which controls the variable resistor by turning or sliding, or by using a button. The mode adjusts the voltage level to provide the dimming signal. According to the light-emitting diode device with adjustable color temperature and brightness according to item 1 of the scope of the patent application, wherein the first switching transistor and the second switching transistor are metal-oxide-half field effect transistors.