Multi-wavelength LED structure and making process thereof

Abstract

This invention arranges at least one fluorescence material with fixed wavelength at the bottom and above the periphery of the luminous chip, when the luminous chip electrifies, it actives the luminous chip to form colored light with high luminous efficient, which can avoid disturbance, and because the fluorescence material's deal and proportion of different parts are easy to control, so this method is benefit for controlling the quality of the multi-wavelength radiation dipolar and its production.

Description

technical field [0001] The invention relates to the luminous efficiency and light color performance technology of light-emitting diodes, aiming to provide a multi-wavelength light-emitting diode structure and manufacturing process capable of producing high luminous efficiency and accurate gloss. Background technique [0002] As shown in FIG. 1 , it is a schematic diagram of the basic structure of a conventional multi-wavelength light-emitting diode. In this multi-wavelength light-emitting diode, the light-emitting chip 10 is fixed in a bowl-shaped carrier 20 with a die-bonding glue 40, and a gold wire is used to 30 constitutes the connection between the light-emitting chip 10 and the electrode terminal 21, and covers the light-emitting chip 10 with fluorescent glue 50 having fluorescent powder, so that the light source of the light-emitting chip excites the fluorescent powder of the fluorescent glue 50 when the light-emitting chip 10 is energized. To form the expected light ...

AI Technical Summary

Problems solved by technology

[0003] The multi-wavelength light-emitting diode shown in Figure 1 generally uses a blue chip to excite the yellow phosphor powder 51 mixed in the fluorescent glue 50 to produce "pseudo-white light" that looks like white light, but because similar multi-wavelength light-emitting diodes only transmit Phosphor powder of a single color is used as complementary light excited by the light-emitting chip, resulting in poor color and yellow halo phenomenon of the formed "pseudo-white light". As a result, the industry has also developed two kinds of phosphors mixed in the fluorescent glue as shown in Figure 2. The multi-wavelength light-emitting diode structure of phosphor powder, this kind of multi-wavelength light-emitting diode generally uses the blue chip to excite the red phosphor powder 52 and the green phosphor powder 53 mixed in the fluorescent glue 50, so as to use the red and green two-color and light-emitting chip 10 blue light combined to achieve the light mixing effect of the three primary colors to produce a light color close to white light with high color rendering; however, this type of multi-wavelength light-emitting diode cannot effectively control the color of the finished product because the amount and ratio of different phosphors are difficult to control. In addition, different phosphors are simultaneously excited by the light source of the light-emitting chip at the same position, which will cause interference, that is, the energy of phosphors with shorter wavelengths will be partially absorbed and consumed by phosphors with longer wavelengths, and It is impossible to predict its consumption ratio, so that unexpected color shift occurs, and the expected light color cannot be accurately displayed, and because the short-wavelength phosphor emits a light wave with a slightly longer wavelength after being excited by the light-emitting chip, the longer-wavelength light In addition to participating in light mixing to produce white light, it will re-excite phosphors with longer emission wavelengths and reduce luminous efficiency, thus resulting in lower luminous brightness.

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