CN104282672A - Light-emitting diode packaging structure with adjustable color temperature - Google Patents

Abstract

The invention relates to a light emitting diode packaging structure capable of adjusting color temperature, which comprises: the fluorescent lamp comprises a base, a fluorescent powder layer, a first power supply and a second power supply, wherein the base comprises at least one blue light-emitting diode, at least one red light-emitting diode and at least one green light-emitting diode; the first power supply inputs a first current to the blue light emitting diode and the second power supply inputs a second current to the red light emitting diode and the green light emitting diode according to the requirements of users, or respectively inputs three currents to the blue light emitting diode, the red light emitting diode and the green light emitting diode so as to adjust the color temperature of the light emitting diode packaging structure.

Description

Light-emitting diode packaging structure with adjustable color temperature

technical field

The invention relates to a light-emitting diode packaging structure, in particular to a light-emitting diode packaging structure with an adjustable color temperature function.

Background technique

In recent years, due to the gradual increase in the pressure on energy supply in the world, the carbon dioxide emissions caused by energy consumption have a serious impact on the greenhouse effect. Therefore, LED components have attracted much attention in recent years. In addition, compared with traditional light bulbs, light-emitting diodes have absolute advantages, such as small size, long life, low voltage/current drive, not easy to break, mercury-free (no pollution problem), and good luminous efficiency (power saving), etc., Therefore, light-emitting diodes are widely used in daily life and industry, such as various display lighting, backlight modules of display screens, car brake lights, outdoor information billboards or traffic signs, etc., are used as lighting sources. Great expectations.

Color temperature (unit: absolute temperature K), the color temperature of a light source is defined as the absolute temperature value of the "standard black body (black body radiator)" itself with the same light color, and this temperature can be found on the Planckian locus on the chromaticity diagram find its corresponding point. The higher the temperature of the standard black body, the more blue components and less red components in the light spectrum it radiates. Take an ordinary incandescent light bulb that emits warm white light as an example, its color temperature is 2700K, while the color temperature of daylight fluorescent lamp is 6000K. Generally speaking, if the color temperature is low, it will be orange, indicating warm light; as the color temperature increases, it will become white light like the sun at noon; There is blue, refreshing light.

At present, most of the existing lighting devices that use light-emitting diodes as light sources only have a light source output with a single lighting color temperature. LEDs are usually added with fluorescent substances to determine the light source output of the lighting color temperature of the LEDs before the manufacture is completed. Therefore, unless the user replaces the LEDs that are matched with the lighting device, the user cannot During the process of using the lighting device, the lighting color temperature of the light source is regulated, thus causing inconvenience to the users, and it is impossible to adjust the proper light at the right time or the right place.

However, in order to improve the above situation, there is an existing square light diode lamp that can adjust the color temperature. The lamp includes a blue light emitting diode, a red light emitting diode and a green light emitting diode, and these light emitting diodes are respectively driven by the corresponding power supply. And produce blue light, red light and green light, so just can produce white light, but this lamp is because blue light-emitting diode, this red light-emitting diode and this green light-emitting diode are respectively arranged, that is each is a single encapsulation structure, and has certain Therefore, the direction of the light color is different, so it is not easy to mix uniform white light, causing discomfort to the user's eyes.

For example, China Taiwan Publication No. 200905854 provides a white light-emitting diode (LED) device capable of adjusting correlated color temperature to realize mood lighting. The white LED device includes a package body for containing the light source module; a first light source module contained in the package body, which has one or more first LED chips and a first phosphor, and can emit light with White light with a first correlated color temperature (CCT); a second light source module contained in a package, which has one or more second LED chips and a second phosphor, and can emit white light with a second correlated color temperature and a current control unit for changing the current supplied to at least one of the first and second LED chips, so as to adjust the first and second correlated color temperatures. However, as mentioned above, since there is a certain distance between the first light source module and the second light source module, and the directional light colors are different, it is difficult to mix uniform white light, and the color rendering of light is also reduced.

Because prior art still can't deal with this type of problem perfectly, so there is the necessity of breaking through and solving. Therefore, how to improve convenience, practicability and economic benefits is a key project that the industry should strive to solve and overcome.

For this reason, the inventor of the present invention, in view of the lack of problems in the conventional LED packaging structure with adjustable color temperature and the unsatisfactory structural design, the inventor of this case started to develop its solution, hoping to develop a more The light-emitting diode packaging structure with adjustable color temperature for convenience, practicability and high economic benefits serves the public and promotes the development of this industry. After a long time of conception, the present invention is produced.

Contents of the invention

The main purpose of the present invention is to provide a light emitting diode package structure with adjustable color temperature, which has high convenience, and the user can adjust the appropriate color temperature to meet the needs.

The secondary purpose of the present invention is to provide a light emitting diode packaging structure with adjustable color temperature, which has high light mixing property and can make the light emitted by the light emitting diode more uniform.

In order to achieve the above-mentioned objectives and effects, the present invention discloses a light-emitting diode packaging structure with adjustable color temperature, which includes: a base, a phosphor layer, a first power supply and a second power supply, the base The seat includes at least one blue light-emitting diode, at least one red light-emitting diode and at least one green light-emitting diode; the phosphor layer is arranged above the blue light-emitting diode, the red light-emitting diode and the green light-emitting diode; the first supply The power supply is electrically connected to the blue light-emitting diode; the second power supply is electrically connected to the red light-emitting diode and the green light-emitting diode; wherein, the first power supply is used to input a first current to the blue light-emitting diode, and the second power supply is connected to the blue light-emitting diode. The second power supply inputs a second current to the red light-emitting diode and the green light-emitting diode to adjust the color temperature of the light-emitting diode packaging structure.

Furthermore, the power supply of the blue LED, the red LED and the green LED can be independently powered to adjust the color temperature of the LED packaging structure.

The beneficial effect of implementing the present invention is that the LED packaging structure with adjustable color temperature of the present invention can use different power supplies to input currents to LEDs of different colors to adjust the color temperature of the LED packaging structure according to the needs of users. The invention has wide industrial applicability and practicability, and further has excellent convenience.

Description of drawings

Fig. 1: it is the sectional view of a preferred embodiment of the present invention;

Fig. 2A: it is the block diagram of a preferred embodiment of the present invention;

Fig. 2B: it is the block diagram of another preferred embodiment of the present invention;

Fig. 3: it is the sectional view of another preferred embodiment of the present invention;

Fig. 4A: it is the block diagram of another preferred embodiment of the present invention;

FIG. 4B: it is a block diagram of another preferred embodiment of the present invention;

Fig. 5: it is the experiment data figure of another preferred embodiment of the present invention; And

Fig. 6: It is a block diagram of another preferred embodiment of the present invention.

[Description of drawing number comparison]

1 LED packaging structure

10 base

102 circuit board

12 blue LEDs

14 Red LEDs

16 Green LEDs

18 storage slots

182 Groove bottom

184 reflective layer

20 Phosphor layer

22 Phosphor powder

24 transparent colloid

30 First power supply

40 Second power supply

45 third power supply

50 controllers

I1 first current

I2 Second current

I3 third current

V1 first voltage

V2 second voltage

Detailed ways

In order to make the structural features of the present invention and the achieved effects have a further understanding and recognition, preferred embodiments and detailed descriptions are specially used, which are described as follows:

Most of the light-emitting diode packaging structures with adjustable color temperature in the prior art cannot adjust their color temperature, and the remaining light-emitting diodes that can adjust the color temperature have poor optical rotation and easily cause discomfort to the eyes of users. Therefore, the present invention addresses these shortcomings. , the light-emitting diode packaging structure with adjustable color temperature is designed to achieve the goals of high convenience and high light mixing.

First, please refer to FIG. 1 and FIG. 2A, B, which are a cross-sectional view and a block diagram of a preferred embodiment of the present invention. As shown in the figure, a light emitting diode packaging structure 1 of the present invention includes a base 10, a phosphor layer 20, a first power supply 30 and a second power supply 40, and the base 10 includes at least A blue LED 12 , at least one red LED 14 and at least one green LED 16 .

Wherein, the phosphor layer 20 is disposed above the blue LED 12, the red LED 14 and the green LED 16; the first power supply 30 is electrically connected to the blue LED 12 to supply the blue LED. The energy source of the red light emitting diode 12; the second power supply 40 is electrically connected to the red light emitting diode 14 and the green light emitting diode 16 to supply the red light emitting diode 14 and the green light emitting diode 16 with energy; wherein, through the first power supply The power supply 30 supplies current to the blue light-emitting diode 12 and the second power supply 40 supplies current to the red light-emitting diode 14 and the green light-emitting diode 16, and then uses the first power supply 30 and the second power supply 40 to input Different currents are used to adjust the brightness of the blue LED 12 , the red LED 14 and the green LED 16 , thereby adjusting the color temperature of the LED packaging structure 1 . Wherein, as shown in FIG. 2A, the red light emitting diode 14 and the green light emitting diode 16 are connected in parallel, or as shown in FIG. 2B, the red light emitting diode 14 and the green light emitting diode 16 are connected in series, so as to facilitate simultaneous supply of voltage and current , in order to achieve the purpose of controlling the color temperature.

Generally speaking, when only the blue light-emitting diode 12 is used to emit blue light, the phosphor layer 20 can absorb the blue light, convert it into a second color light, and finally produce a third color light after mixing with the blue light, and the third color light Usually a white light. When the current of the red LED 14 and the green LED 16 starts to increase, the brightness of the red LED 14 and the green LED 16 will start to increase. However, affected by the red light and the green light, the color temperature of the light emitting diode package structure 1 begins to decrease, so the purpose of controlling the color temperature can be achieved by controlling the current. When the user needs white light (higher color temperature), the input current of the red LED 14 and the green LED 16 can be reduced or even turned off; when the user needs yellowish light (lower color temperature), The input current of the red LED 14 or the green LED 16 can be increased, so a simple control method can be implemented. In addition, since the commonly used blue LED 12, the red LED 14 and the green LED 16 are electrically connected to the same voltage, LEDs with a lower threshold voltage are easily damaged by excessive voltage, or The light-emitting diodes with a higher threshold voltage cannot be turned on and emit light, so the present invention uses two power supplies to supply the blue light-emitting diodes (the first voltage V1) and the red and green light-emitting diodes (the second voltage V2) respectively, so as to avoid When the same voltage is supplied, it may fail to start or burn out the LED.

However, most of the light-emitting diodes in the prior art are used as light source lighting devices, and most of them only have a single lighting color temperature. Replace the lighting device, otherwise the user cannot adjust the lighting color temperature of the light source during the use of the lighting device. However, there is an existing light-emitting diode lamp that can control the color temperature. The lamp has separately packaged light-emitting diodes. The light-emitting diodes of different colors are packaged into various single-color packaging structures. In order to achieve the purpose of mixing light and controlling the color temperature, there is a distance between the light emitting diode structures, that is, the various monochromatic light emitting diodes are arranged separately, so the light mixing effect is not good. However, the present invention solves the above-mentioned deficiency. The blue light emitting diode 12, the red light emitting diode 14 and the green light emitting diode 16 of the present invention are located in the same packaging structure, in other words, they are all in the same phosphor layer 20, so their mixed light Better performance, the emitted light is more uniform, reducing the burden on the user's eyes due to poor light mixing.

In addition, in the light-emitting diode packaging structure with adjustable color temperature of the present invention, the phosphor layer 20 includes a plurality of phosphors 22 and a transparent colloid 24, and the phosphors 22 are mixed in the transparent colloid 24 to form the phosphor layer 20 . Through these phosphors 22, the first color light emitted by the internal light-emitting diodes can be converted into the second color light, and the phosphors 52 in this embodiment can be a plurality of yellow phosphors or phosphors of other colors .

Please refer to FIG. 3 , which is a cross-sectional view of another preferred embodiment of the present invention. As shown in the figure, to further explain the detailed structure of the light emitting diode package structure 1, one side of the base 10 includes a receiving groove 18 and a circuit board 102, and the circuit board 102 is arranged in a groove of the receiving groove 18 bottom 182 , and the blue LED 12 , the red LED 14 and the green LED 16 are further arranged on the circuit board 102 for easy loading. In addition, the sidewall of the accommodating groove 18 further includes a reflective layer 184 , which can increase the light reflection amount of the LED package structure 1 to increase brightness.

Please refer to FIG. 4A, B and FIG. 5 , which are block flow diagrams and experimental data diagrams of another preferred embodiment of the present invention. As shown in the figure, an LED package structure with adjustable color temperature of the present invention further includes a controller 50, the controller 50 is electrically connected to the first power supply 30 and the second power supply 40, and the first power supply 30 is electrically connected to the second power supply 40, and the first power supply A power supply 30 is electrically connected to the blue light-emitting diode 12, and the second power supply 40 is electrically connected to the red light-emitting diode 14 and the green light-emitting diode 16, so that the controller 50 controls the first power supply 30 The supply current with the second power supply 40 further controls the brightness of the blue LED 12 , the red LED 14 and the green LED 16 .

As shown in FIG. 5 , for example, this embodiment is described by adjusting the current of the red light emitting diode 14 and the green light emitting diode 16. It is also possible to adjust the current of the blue light emitting diode 12 to adjust the color temperature, wherein the The current of the red LED 14 and the green LED 16 represents R+G5mA to R+G20mA, and the current of the blue LED 12 represents B20mA. When the current of the blue light-emitting diode 12 is fixed at 20mA, the current of the red light-emitting diode 14 and the green light-emitting diode 16 starts to be adjusted from 0mA to 25mA, and the color temperature will drop from about 6020K to 3200K, so only need to adjust The controller 50 supplies current to the red light emitting diode 14 and the green light emitting diode 16 to change the brightness of the red light emitting diode 14 and the green light emitting diode 16, and the light emitted by it will affect the blue light emitting diode 12. The light emitted, so the color temperature can be adjusted. Wherein, as shown in FIG. 4A, the red light emitting diode 14 and the green light emitting diode 16 are connected in parallel with each other, or as shown in FIG. And current, in order to achieve the purpose of controlling the color temperature.

Please refer to FIG. 6 , which is a block flow diagram of another preferred embodiment of the present invention. As shown in the figure, an LED packaging structure with adjustable color temperature according to the present invention further includes a controller 50, which is electrically connected to the first power supply 30, the second power supply 40 and a third power supply. A power supply 45 is provided, and the first power supply 30 is electrically connected to the blue LED 12, and the second power supply 40 is electrically connected to the red LED 14, and the third power supply 45 is electrically connected to the green LED Diode 16, so the controller 50 supplies three kinds of currents by controlling the first power supply 30, the second power supply 40 and the third power supply 45, that is, the first current I1, the first current I2 and the first The current I3 is respectively input to the blue LED 12, the red LED 14, and the green LED 16, thereby controlling the brightness of the blue LED 12, the red LED 14, and the green LED 16, thereby adjusting the color temperature. .

In addition, the first power supply 30 can be connected to blue LEDs in different packaging structures, and the second power supply 40 can be connected to red LEDs and green LEDs in different packaging structures to achieve multi-group control and form a LED lamps with controllable color temperature. However, the present invention mixes light in each packaging structure, which solves the problem of light mixing caused by conventionally controlling LED packaging structures with different colors, thereby bringing more convenient and comfortable LED light to users.

The above is only a preferred embodiment of the present invention, and is not intended to limit the implementation scope of the present invention. All equivalent changes and modifications made in accordance with the shape, structure, characteristics and spirit described in the scope of the claims of the present invention shall be included in the scope of the claims of the present invention.

Claims (10)

1. A light-emitting diode packaging structure with adjustable color temperature, characterized in that it comprises: a base including at least one blue light emitting diode, at least one red light emitting diode and at least one green light emitting diode; a phosphor layer, which is arranged above the blue light emitting diode, the red light emitting diode and the green light emitting diode; a first power supply electrically connected to the blue LED; and a second power supply, which is electrically connected to the red light emitting diode and the green light emitting diode; Wherein, the first power supply is used to input a first current to the blue LED, and the second power supply is used to input a second current to the red LED and the green LED to adjust the color temperature. 2. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 1, wherein The phosphor layer includes a plurality of phosphors and a transparent colloid, and the phosphors are doped in the transparent colloid to form the phosphor layer. 3. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 1, wherein One side of the base includes an accommodating groove. 4. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 3, wherein The sidewall of the accommodating groove further includes a reflective layer. 5. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 3, wherein The base includes a circuit board, and the circuit board is arranged at a groove bottom of the accommodating groove. 6. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 5, wherein The blue LED, the red LED and the green LED are arranged on the circuit board. 7. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 1, wherein The red light emitting diode and the green light emitting diode are connected in parallel or in series. 8 . The light emitting diode packaging structure with adjustable color temperature as claimed in claim 1 , further comprising a controller, the controller is electrically connected to the first power supply and the second power supply. 9. The light-emitting diode packaging structure with adjustable color temperature as claimed in claim 1, wherein The first power supply and the second power supply further provide different voltages to the blue LED, the red LED and the green LED. 10. A light-emitting diode packaging structure with adjustable color temperature, characterized in that it comprises: a base including at least one blue light emitting diode, at least one red light emitting diode and at least one green light emitting diode; a phosphor layer, which is arranged above the blue light emitting diode, the red light emitting diode and the green light emitting diode; a first power supply, which is electrically connected to the blue light-emitting diode; a second power supply electrically connected to the red LED; and a third power supply, which is electrically connected to the green light emitting diode; Wherein, the first power supply, the second power supply and the third power supply are used to input different currents to the blue LED, the red LED and the green LED to adjust the color temperature.