阅读说明：本技术 一种高显色性led及其生产方法 (High-color-rendering LED and production method thereof ) 是由 易汉平 周虎 于 2019-09-17 设计创作，主要内容包括：本发明提供了一种高显色性LED及其生产方法。该高显色性LED包括：一个605-650纳米波段的红光芯片、一个525-555纳米波段的绿光芯片、两个450-475纳米波段的蓝光芯片,其中,红光芯片、绿光芯片和蓝光芯片的额定工作电流相同或相当,四个芯片串联在一起,并且,两个蓝光芯片上覆盖有黄光YAG荧光粉。上述高显色性LED的制备方法包括以下步骤：将一个红光芯片、一个绿光芯片、两个蓝光芯片固定；将每个芯片串联绑定；将黄光YAG荧光粉覆盖在蓝光芯片上；用透明封装胶作发光模组的整体封装,得到所述高显色性LED。本发明的LED光源增加了绿光与红光,蓝光比重自然降低,显色性自然提高,其显色性在95以上。(The invention provides a high-color-rendering LED and a production method thereof. The high color rendering LED includes: the light-emitting diode comprises a red light chip with a wavelength of 605-650 nm, a green light chip with a wavelength of 525-555 nm and two blue light chips with a wavelength of 450-475 nm, wherein rated working currents of the red light chip, the green light chip and the blue light chips are the same or equivalent, the four chips are connected in series, and yellow YAG fluorescent powder covers the two blue light chips. The preparation method of the LED with high color rendering property comprises the following steps: fixing a red light chip, a green light chip and two blue light chips; binding each chip in series; covering yellow YAG fluorescent powder on a blue light chip; and using transparent packaging glue as the integral packaging of the light-emitting module to obtain the high-color-rendering LED. The LED light source of the invention adds green light and red light, the proportion of the blue light is naturally reduced, the color rendering property is naturally improved, and the color rendering property is more than 95.)

1. A high-color rendering LED comprises a red light chip with a wavelength of 605-650 nm, a green light chip with a wavelength of 525-555 nm and two blue light chips with a wavelength of 450-475 nm, wherein rated working currents of the red light chip, the green light chip and the blue light chips are the same or equivalent, the four chips are connected in series, and yellow YAG fluorescent powder covers the two blue light chips.

2. The high color rendering LED of claim 1, wherein the red chip is a 630 nm band red chip.

3. The high color rendering LED of claim 1 or 2, wherein the green chip is a 550 nm band green chip.

4. The high color rendering LED of any one of claims 1-3, wherein the blue chip is a 460 nm band blue chip.

5. The high color rendering LED according to any one of claims 1 to 4, wherein the high color rendering LED comprises a 630 nm band red chip, a 550 nm band green chip, two 460 nm band blue chips, the four chips are connected in series, and the two blue chips are covered with yellow YAG phosphor.

6. The high color rendering LED of claim 1, wherein four chips are disposed on a flat support.

7. The high color rendering LED according to claim 1, wherein the LED is integrally encapsulated by a transparent encapsulating glue.

8. The high color rendering LED of claim 7, wherein the transparent encapsulant comprises epoxy and/or polyester.

9. The high color rendering LED according to claim 1, wherein a rated current of each chip is 20mA, 150mA, 200mA, or 300 mA.

10. Method for producing a high color rendering LED according to any of claims 1 to 9, comprising the steps of:

fixing a red light chip, a green light chip and two blue light chips;

binding each chip in series;

covering yellow YAG fluorescent powder on a blue light chip;

and using transparent packaging glue as the integral packaging of the light-emitting module to obtain the high-color-rendering LED.

Technical Field

The invention relates to a high-color-rendering LED and a production method thereof, belonging to the technical field of LED preparation.

Background

The LED white light source generally adopts a synthesis method, one is a white light source compounded and packaged by a plurality of chips emitting different colors of light, and the other is a white light source compounded by a single color chip and fluorescent powder.

The multi-chip packaged white light source is easy to generate color temperature drift in the use process due to the inconsistent attenuation of various chips. The white light source of the blue light single-chip composite fluorescent powder easily has the problems of excessive blue light and low color rendering.

Disclosure of Invention

In order to solve the above-described problems, an object of the present invention is to provide an LED whose color rendering property can be improved to 90 or more.

In order to achieve the above purpose, the present invention provides a high color rendering LED, which comprises a red light chip with a wavelength of 605-.

The invention forms multiband composite white light by the multiband light-emitting chip and the excited fluorescence, and particularly, the green light chip, the red light chip, the blue light chip and the yellow light fluorescent powder are compounded and packaged in a bracket to obtain the LED with higher color rendering.

According to the specific embodiment of the present invention, the rated operating currents of the red light chip, the green light chip and the blue light chip used in the high color rendering LED are preferably the same or equivalent, for example: the rated current of each chip is 20mA, 150mA, 200mA or 300mA and the like; the size, power and other parameters of the chip are not required.

According to the specific embodiment of the invention, the red light chip can be a 630 nm wave band red light chip.

According to the specific embodiment of the invention, the green chip can be a green chip with a wavelength band of 550 nanometers.

According to the specific embodiment of the invention, the blue chip can be a 460 nm blue chip.

In a specific embodiment of the present invention, the high color rendering LED of the present invention may include a 630 nm wavelength red chip, a 550 nm wavelength green chip, and two 460 nm wavelength blue chips, the four chips are connected in series, and the two blue chips are covered with yellow YAG phosphor.

In the high-color-rendering LED, preferably, four chips are disposed on the flat support, and preferably, the flat support has good heat dissipation and light reflection effects.

In the above high color rendering LED, the LED is preferably integrally encapsulated by a transparent encapsulating adhesive. Transparent encapsulating glue is used such as epoxy glue and/or polyester, etc.

The invention also provides a production method of the high-color-rendering LED, which comprises the following steps:

fixing a red light chip, a green light chip and two blue light chips;

binding each chip in series;

covering yellow YAG fluorescent powder on a blue light chip;

and using transparent packaging glue as the integral packaging of the light-emitting module to obtain the LED.

The LED provided by the invention can emit multiband light including blue light, green light, yellow light and red light, so that the LED has higher color rendering property. The white light source of the blue light single-chip composite fluorescent powder is mainly blue light and yellow light, so that the blue light is relatively much, and the color rendering property is poor because the light source lacks red light. The LED light source of the invention adds green light and red light, the proportion of the blue light is naturally reduced, the color rendering property is naturally improved, and the color rendering property is more than 95.

The LED is a white light source packaged by multiple chips, which is a composite light source, and if the blue light chip is attenuated, the red light of the light source is relatively increased, and the color temperature is reduced. The white light emitted by the LED can be seen as two groups, namely red, green and blue composite white light, namely white light generated by the combination of chips; firstly, blue-yellow composite white light, namely, white light is generated by compounding a blue light chip and YAG fluorescent powder, so that the LED has better color temperature stability.

Drawings

Fig. 1 is a schematic structural diagram of a high color rendering LED provided in embodiment 1.

Fig. 2 is a graph of performance test results of the integrating sphere electric light source of the high color rendering LED provided in example 1.

Detailed Description

The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention.