Improving of View With Visual Under RGB Color LED Lighting by Influence Analysis of Chromatic Aberration Caused by Dominant Wavelength of LEDs

Under lighting using RGB (red, green and blue) color LEDs, retina images become sharper. Under lighting light with the same illuminance and chromaticity, the near point distance, which is extended by presbyopia was reduced by 12%. Also visual acuity was improved by 11%. However, further improvements are desired to commercialize RGB color LED lighting. The sharpness of the boundaries of retinal images is thought to be due to the chromatic aberration of each color of light. The near point distance and visual acuity were thought that they could be further improved by lengthening the dominant wavelength of the red LED and shortening the dominant wavelength of the blue LED. Therefore, the authors analyzed chromatic aberration and manufactured a lighting, in which the dominant wavelength of the red LED was lengthened to 660 nm from 625 nm, and the dominant wavelength of the blue LED was shortened to 425 nm from 470 nm, as long as the luminous efficiency can be maintained. We repeated measure the near point distance and visual acuity using the manufactured lighting. As a result, the near point distance was shortened by 9% to 13% and visual acuity was improved by 11% to 22%.