Abstract— Progress in the development of blue light‐emitting diodes and yellow phosphor has led to the realization of solid‐state lighting. The development was followed by improvement in the luminous efficacy of ultraviolet light‐emitting diodes (UV‐LEDs). By using near‐UV‐LEDs (n‐UV‐LEDs) excited light for red, green, and blue (RGB) phosphors, a new type of solid‐state lighting was realized. An innovative method for increasing the efficiency of LEDs by using a silicon nitride layer as the active layer and piling them up to a nano‐sized level with nano‐sized holes has been developed.

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while the solid state lighting has already become a reality using blue LEDs with yellow phosphor (B+Y), progress development and the luminous efficacy of ultraviolet light emitting diode (UV‐ LED) improvements have followed. Soon white emission as the product of nearUV (nUV)‐LEDs exciting red, green and blue (RGB) phosphors will also contribute to the solid state lighting revolution. We present the technologies and the possibility of using nUV+RGB white LEDs for the application to LCD backlighting.