Figure 5

Flexible spectral control using the single LED chip. EL spectra variation under injection currents of (a) 5 mA at Top and 0.25–0.40 mA at Slope B and (b) 1–6 mA at Top and 0.35 mA at Slope B. (c,d) The photographs under operations of (a,b), respectively. (e) CIE chromaticity diagram for the spectral controls.