TWI741799B - Light-emitting apparatus - Google Patents

Abstract

A light-emitting apparatus includes a light-emitting diode module and a fluorescent module. The light-emitting diode module includes at least two of a first light-emitting diode, a second light-emitting diode, and a third light-emitting diode. A wavelength of the first light-emitting diode is between 440 nm and 450 nm. A wavelength of the second light-emitting diode is between 450 nm and 460 nm. A wavelength of the third light-emitting diode is between 465 nm and 475 nm. The fluorescent module includes green phosphors with a peak emission wavelength between 515 nm and 545 nm, and red phosphors with a peak emission wavelength greater than 630 nm.

Description

Light-emitting device

The present invention relates to a light-emitting device, in particular to a light-emitting device with temperature-stable output spectrum.

A light-emitting diode (LED) is a semiconductor element that converts electrical energy into light energy through a semiconductor compound to achieve a light-emitting effect. It has the advantages of long life, high stability, and low power consumption. It has been widely used in lighting. With the rapid development of light-emitting diodes and diverse application methods, in order to achieve more color light output, you can consider three colors such as red (R), green (G), blue (B), or four Color-integrated red (R), green (G), blue (B), white (W), or red (R), green (G), blue (B), Alpha color space (A), etc. A dazzling combination method, and when most light-emitting diodes need to change the exit angle of the beam, a secondary optical lens is generally used, especially a total internal reflection (TIR) lens is more common. As far as the prior art is concerned, most light-emitting diodes use a single-range waveband chip to excite phosphors to generate the required color temperature, color rendering, or spectrum. Under the currently known packaging conditions, in order to improve the color rendering index (CRI) of white light used in daily lighting, and to evaluate the blue light hazard of the light source to the human body, the general mainstream direction will increase the exposure to red light. The added amount of excited red phosphor is used to fine-tune the output spectrum of the body. However, due to the simulated sunlight effects (such as AM 1.0, AM 1.5 etc.) or the light-emitting diode used for full spectrum effect will generate a lot of heat during the lighting process, so when a large amount of red phosphor is used, the wavelength peak is easily affected by temperature, which causes the overall output spectrum to drift , Resulting in the inability to maintain a stable spectrum state under long-term use.

For this reason, how to design a light-emitting device, especially to solve the aforementioned technical problems in the prior art, is an important subject studied by the inventors of this case.

One object of the present invention is to provide a light emitting device to solve the technical problem that the prior art cannot maintain a stable spectrum state when the simulated sunlight effect or full spectrum effect is generated for a long time, and achieve the purpose of outputting a temperature-stable spectrum state.

In order to achieve the foregoing objective, the light-emitting device proposed in the present invention includes a light-emitting diode module and a fluorescent module. Wherein, the light-emitting diode module includes at least two of a first light-emitting diode, a second light-emitting diode, and a third light-emitting diode, and the wavelength of the first light-emitting diode ranges from 440 nm to 450 Between nanometers, the wavelength of the second light-emitting diode is between 450 nanometers and 460 nanometers, and the wavelength of the third light-emitting diode is between 465 nanometers and 475 nanometers. The fluorescent module is disposed on the light-emitting diode module, and is covered outside the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode. Among them, the phosphor module includes green phosphor and red phosphor. The peak emission wavelength of the green phosphor is between 515 nm and 545 nm, and the peak emission wavelength of the red phosphor is greater than 630. Nano. Wherein, when the green phosphor has 120 to 140 parts by weight, the red phosphor has 10 to 30 parts by weight.

Furthermore, the wavelength of the first light-emitting diode is between 445 nanometers and 450 nanometers, the wavelength of the second light-emitting diode is between 452.5 nanometers and 460 nanometers, and the wavelength of the third light-emitting diode is between 452.5 nanometers and 460 nanometers. The wavelength is between 465nm and 470nm.

Furthermore, the green phosphor includes a first phosphor and a second phosphor. The first phosphor has a peak wavelength between 515 nm and 530 nm, and the second phosphor has a peak wavelength between 515 nm and 530 nm. Between 525nm and 540nm.

Furthermore, when the first phosphor has 90 to 110 parts by weight, the second phosphor has 20 to 40 parts by weight.

Furthermore, the red phosphor includes a third phosphor, and the wavelength peak of the third phosphor is between 640 nm and 660 nm.

Furthermore, the number of the first light-emitting diode accounts for more than 30% of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode.

Furthermore, the number of the second light-emitting diode accounts for more than 20% of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode.

Furthermore, the number of the third light-emitting diode accounts for more than 20% of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode.

When using the light-emitting device of the present invention, at least two of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode used are compatible with the green phosphor and the red phosphor The combination can produce a spectrum that meets the full-spectrum specification. And because when the green phosphor has 120 to 140 parts by weight, the red phosphor has only 10 to 30 parts by weight, the present invention can be used in the general black body radiation spectrum application range of 2700K to 4000K, producing temperature stability The specified spectrum, at room temperature from 25 degrees Celsius to 85 degrees Celsius in the hot state, will not cause a serious shift in the overall spectral peaks.

For this reason, it can effectively solve the technical problem that the prior art cannot maintain a stable spectrum state when the simulated sunlight effect or full spectrum effect is produced for a long time, and achieve the purpose of outputting a temperature-stable spectrum state.

In order to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe that the features and characteristics of the present invention can be obtained from this in-depth and specific understanding. However, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

10: LED module

11: The first light-emitting diode

12: The second light-emitting diode

13: The third light-emitting diode

20: Fluorescent module

30: substrate

40: Wall glue

A: Section line

L11, L12: electrode terminal

L21, L22: electrode terminal

L31, L32: Electrode end

R25: Spectral curve

R85: Spectral curve

1 is a schematic top view of the light-emitting device of the present invention; FIG. 2 is a schematic cross-sectional view of the light-emitting device of the present invention; FIG. 3 is a schematic diagram of black body radiation curves at different color temperatures;

The technical content and detailed description of the present invention are described below in conjunction with the drawings.

Please refer to Figure 1 to Figure 2. Among them, FIG. 1 is a schematic top view of the light-emitting device of the present invention. Fig. 2 is a schematic cross-sectional view of the light-emitting device of the present invention.

In an embodiment of the present invention, the light-emitting device includes a light-emitting diode module 10 and a fluorescent module 20. The light-emitting diode module 10 includes at least two of the first light-emitting diode 11, the second light-emitting diode 12 and the third light-emitting diode 13. The wavelength of the first light emitting diode 11 may be between 440 nm and 450 nm. The wavelength of the second light-emitting diode 12 may be between 450 nm and 460 nm, and the wavelength of the third light-emitting diode 13 may be between 465 nm and 475 nm. Furthermore, the wavelength of the first light emitting diode 11 may be between 445 nm and 450 nm. The wavelength of the second light-emitting diode 12 may be between 452.5 nm and 460 nm. The wavelength of the third light-emitting diode 13 may be between 465 nm and 470 nm.

In the embodiment of the present invention, the number of the first light-emitting diode 11 accounts for more than 30% of the total number of the first light-emitting diode 11, the second light-emitting diode 12, and the third light-emitting diode 13 . The number of the second light-emitting diode 12 accounts for more than 20% of the total number of the first light-emitting diode 11, the second light-emitting diode 12 and the third light-emitting diode 13. The number of the third light-emitting diodes 13 accounts for more than 20% of the total number of the first light-emitting diodes 11, the second light-emitting diodes 12, and the third light-emitting diodes 13. In the embodiment of the present invention, if the total number of the first light-emitting diode 11, the second light-emitting diode 12, and the third light-emitting diode 13 is 12pcs, the first light-emitting diode 11, the second light-emitting diode 13 The ratio between the two light-emitting diodes 12 and the third light-emitting diode 13 may be 1:1:1, 4:5:3, or 5:4:3. As shown in FIG. 1, the light-emitting diode module 10 has three light-emitting diode light strings each including 12 pcs. The first light string may include an electrode terminal L11 and an electrode terminal L12, and the second light string The string may include an electrode terminal L21 and an electrode terminal L22, and the third light string may include an electrode terminal L31 and an electrode terminal L32. However, the present invention is not limited by the above.

Furthermore, the first light-emitting diode 11, the second light-emitting diode 12, and the third light-emitting diode 13 of the embodiment of the present invention may be directly attached to the substrate by using bare crystals. The chip on the board 30 is processed in a chip on board (COB) manner. Compared with standard products, chip-on-chip packaging (COB) is a relatively new product in the LED market and offers more advantages. COB basically means that the manufacturer directly bonds multiple LED chips (usually nine or more) to the substrate to form a single module. Since the individual LEDs used in COB are in the form of a chip instead of a traditional package, the chip can be installed in a way that reduces space and fully utilizes the potential of the LED chip. After the COB package is energized, its appearance is more similar to a light-emitting board instead of multiple independent light-emitting bodies (when multiple SMD LEDs are tightly mounted).

The fluorescent module 20 is disposed on the light-emitting diode module 10 and is covered outside the first light-emitting diode 11, the second light-emitting diode 12 and the third light-emitting diode 13. Among them, the phosphor module 20 includes green phosphor and red phosphor. The wavelength peak of the green phosphor can be between 515 nm and 545 nm, and the peak wavelength of the red phosphor is greater than 630 nm. And, when the green phosphor has 120 to 140 parts by weight, the red phosphor has 10 to 30 parts by weight. Furthermore, the green phosphor includes a first phosphor and a second phosphor. The peak wavelength of the first phosphor can be between 515 nm and 530 nm, and the peak wavelength of the second phosphor can be between 515 nm and 530 nm. Between 525nm and 540nm. In the illustrated embodiment of the present invention, the red phosphor only includes the third phosphor, and the wavelength peak of the third phosphor is between 640 nm and 660 nm. Also, when the first phosphor has 90 to 110 parts by weight, the second phosphor may have 20 to 40 parts by weight, and the third phosphor may have 10 to 30 parts by weight.

As shown in FIG. 2, it is the cross section of FIG. 1 along the section line A. In the described embodiment of the present invention, the fluorescent module 20 may further include an optically transparent colloid (such as epoxy resin) to enable the first phosphor, the second phosphor, and the third phosphor Evenly dispersed in the optically transparent colloid to form a packaging material, and covered on the light-emitting diode module 10 to isolate the first light-emitting diode 11, the second light-emitting diode 12 and the third light-emitting diode Polar body 13 And the external environment. In the described embodiment of the present invention, a wall glue 40 is further included on the substrate 30 to surround the fluorescent module 20 so that the optically transparent glue, the first fluorescent powder, the second fluorescent powder, and the second fluorescent powder The three phosphors are fixed on the LED module 10. However, the present invention is not limited by the above.

Please refer to Figure 3 to Figure 4. Among them, Figure 3 is a schematic diagram of blackbody radiation curves with different color temperatures. Fig. 4 is a schematic diagram of the frequency spectrum of the light-emitting device of the present invention at different temperatures. The black body radiation refers to the electromagnetic radiation emitted by a black body in a thermodynamic equilibrium state, and the electromagnetic spectrum of the black body radiation depends only on the temperature of the black body. On the other hand, the so-called black body radiation is actually a phenomenon shown by the balance between light and matter. Matter reaches equilibrium, so a temperature can be used to describe the state of matter. . As shown in Figure 4, taking black body radiation with a color temperature of 4000K as an example, when the light-emitting device of the present invention is used, the first light-emitting diode 11, the second light-emitting diode 12, and the third light-emitting diode are used. The combination of at least two of the bodies 13 with the green phosphor and the red phosphor can produce a spectrum that meets the full-spectrum specification. And because when the green phosphor has 120 to 140 parts by weight, the red phosphor only has 10 to 30 parts by weight, so the present invention can be used in the general use of 2700K to 4000K black body radiation spectrum application range, produce temperature stability The spectrum.

As shown in Figure 4, a product with a preset specification that produces blackbody radiation with a color temperature of 4000K is heated at room temperature at 25 degrees Celsius (spectral curve R25 in Figure 4) to a thermal state of 85 degrees Celsius (spectral curve R85 in Figure 4) ) The spectral curve produced does not cause a serious shift in the overall spectral peak. For example, the spectral peaks between 450 nanometers (nm) and 500 nanometers (nm) and the spectral peaks near 650 nanometers (nm) are not severely shifted due to temperature differences. Although FIG. 4 only shows the state of black body radiation conforming to the color temperature of 4000K, according to the actual measured results of the present invention, the embodiment of the present invention also conforms to the black body radiation of the color temperature of 3000K and the black body radiation of the color temperature of 2700K. Heat to hot at room temperature 25 degrees Celsius The spectral curve produced by 85 degrees Celsius does not have the technical effect of causing a serious shift in the overall spectral peak.

For this reason, it can effectively solve the technical problem that the prior art cannot maintain a stable spectrum state when the simulated sunlight effect or full spectrum effect is produced for a long time, and achieve the purpose of outputting a temperature-stable spectrum state.

The above are only detailed descriptions and drawings of the preferred embodiments of the present invention. However, the features of the present invention are not limited to these, and are not intended to limit the present invention. The full scope of the present invention should be covered by the following patent application scope As the criterion, all embodiments that conform to the spirit of the patent application of the present invention and similar changes should be included in the scope of the present invention. Anyone familiar with the art in the field of the present invention can easily think of changes or Modifications can be covered in the following patent scope of the present invention.

The structure, ratio, size, number of components, etc. shown in the drawings in this specification are only used to match the content disclosed in the specification for the understanding and reading of those familiar with the technology, and are not intended to limit the implementation of the present invention. Limited conditions, so it does not have technical significance. Any structural modification, proportional relationship change or size adjustment, without affecting the effects and objectives that can be achieved by the present invention, shall fall under the present invention. The technical content of the disclosure must be within the scope of coverage.

10: LED module

11: The first light-emitting diode

12: The second light-emitting diode

13: The third light-emitting diode

20: Fluorescent module

40: Wall glue

A: Section line

L11, L12: electrode terminal

L21, L22: electrode terminal

L31, L32: Electrode end

Claims (8)

A light-emitting device includes: a light-emitting diode module, including a first light-emitting diode, a second light-emitting diode, and a third light-emitting diode. The first light-emitting diode and the second light-emitting diode The light-emitting diodes and the third light-emitting diodes alternately form at least one light string connected in series, and the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode are interleaved with each other. The quantity ratio is 1:1:1, 4:5:3 or 5:4:3; among them, the wavelength of the first light-emitting diode is between 440nm and 450nm, and the second light-emitting diode The wavelength of the body is between 450 nanometers and 460 nanometers, the wavelength of the third light-emitting diode is between 465 nanometers and 475 nanometers; and a fluorescent module is disposed on the light-emitting diode Above the module, and set outside the first light-emitting diode, the second light-emitting diode and the third light-emitting diode; wherein, the fluorescent module includes a green phosphor and a Red phosphor, the green phosphor has a wavelength peak between 515 nm and 545 nm, and the red phosphor has a wavelength peak greater than 630 nm; among them, when the green phosphor has 120 to 140 nm In parts by weight, the red phosphor has 10 to 30 parts by weight. The light-emitting device according to claim 1, wherein the wavelength of the first light-emitting diode is between 445 nanometers and 450 nanometers, and the wavelength of the second light-emitting diode is between 452.5 nanometers and 460 nanometers The wavelength of the third light-emitting diode is between 465 nanometers and 470 nanometers. The light-emitting device according to claim 1, wherein the green phosphor includes a first phosphor and a second phosphor, and the wavelength peak of the first phosphor is between 515 nm and 530 nm The peak wavelength of the second phosphor is between 525 nm and 540 nm. The light-emitting device according to claim 3, wherein when the first phosphor has 90 to 110 parts by weight, the second phosphor has 20 to 40 parts by weight. The light-emitting device according to claim 1, wherein the red phosphor includes a third phosphor, and the third phosphor has a wavelength peak between 640 meters and 660 nm. The light-emitting device according to claim 1, wherein the number of the first light-emitting diode accounts for 30 of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode %above. The light-emitting device according to claim 1, wherein the number of the second light-emitting diode accounts for 20 of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode %above. The light-emitting device according to claim 1, wherein the number of the third light-emitting diode accounts for 20 of the total number of the first light-emitting diode, the second light-emitting diode, and the third light-emitting diode %above.

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