Light emitting apparatus, led illumination apparatus, and method for manufacturing phosphor-containing film piece used in light-emitting apparatus

Abstract

Provided are: a lower-cost light-emitting apparatus having improved properties as an LED illumination device or as an LED illumination apparatus, such as an LED bulb, by eliminating interaction between the phosphors and using a structure and mechanism design for optimized conditions; and a method for manufacturing the same. The present invention is a light-emitting apparatus comprising: a semiconductor light-emitting element for emitting blue, purple, or ultraviolet light; and a phosphor for emitting intrinsic light that is excited by light from the semiconductor light-emitting element; wherein the light-emitting apparatus is characterized in having a specific structure, that is, a structure with separated phosphors, in which as the intrinsic light, two or more types of phosphors of different colors are used from among a blue phosphor for emitting blue light, a green phosphor for emitting green light, a yellow phosphor for emitting yellow light, and a red phosphor for emitting red light. The two or more types of phosphors are disposed in the lateral direction in a state in which they do not overlap each other vertically, and interactions between the phosphors are suppressed.

Description

technical field [0001] The present invention relates to a light-emitting device used for LED lighting, in particular to a light-emitting device composed of a semiconductor light-emitting element that emits blue light, purple light, and ultraviolet light, and a phosphor that converts the light into white light, and an LED bulb and methods of manufacture thereof. Background technique [0002] In recent years, lighting devices using LEDs have been put into practical use, and incandescent light bulbs and fluorescent lamps, mercury lamps and halogen lamps are also being replaced. The reason is that it can achieve the same brightness with low power consumption, and it can also significantly reduce carbon dioxide emissions, which are the root cause of global warming, and become the trump card of environmentally friendly products. For example, the equivalent brightness of a 60W incandescent bulb can be achieved with a 9W LED bulb. In this way, if all lighting is replaced with LED ...

AI Technical Summary

Problems solved by technology

[0016] First, as for Sample 3 in which phosphors are mixed, the blue light emitted from the LED element is converted into broad-spectrum green light by the green-based phosphor, and this light is converted into broad-spectrum green light by the red-based phosphor. Spectrum red light, thus becoming the light converted by the above two stages, therefore, there will be loss along with the conversion of the two stages

That is, a loss occurs in the luminous efficiency of white light as the overall light

[0017] Second, because of the disappearance of the green light component, of course there will be a change in color temperature, but the damage to the average color rendering index Ra is greater

In the previous patent documents, there is no discussion on the influence related to the characteristics of the light determined by the interaction.

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