Patent ID: 9695359
Date: 2017-07-04
CPC Classifications: C09K,H01L

Claim:
1. An LED illuminating device, comprising: an LED chip with an emission wavelength of 240 nm to 500 nm; and luminescent powder, wherein the luminescent powder comprises a yellow light afterglow material comprising a compound having a chemical formula of aY (1) a is 1.45, b is 2.5, c is 0.01, m is 0.24, n is 0.05, x is 0.1, y is 0.2; (2) a is 1.45, b is 2.5, c is 0.5, m is 0.01, n is 0.3, x is 0.02, y is 0.3; (3) a is 1.5, b is 2.6, c is 0.01, m is 0.1, n is 0.05, x is 0.1, y is 0.2; (4) a is 1, b is 2.05, c is 0.01, m is 0.0001, n is 0.1, x is 0.002, y is 0.01; (5) a is 1.2, b is 2.2, c is 0.005, m is 0.05, n is 0.06, x is 0.0001, y is 0.08; (6) a is 1.85, b is 2.7, c is 0.12, m is 0.008, n is 0.0065, x is 0.05, y is 0.004; (7) a is 2, b is 2.95, c is 1, m is 0.2, n is 0.3, x is 0.04, y is 0.04; (8) a is 1.45, b is 2.5, c is 0.002, m is 0.6, n is 0.15, x is 0.03, y is 0.3; (9) a is 1.45, b is 2.5, c is 0.01, m is 0.3, n is 0.5, x is 0.01, y is 0.0001; (10) a is 1.75, b is 3, c is 0.01, m is 0.34, n is 0.02, x is 0.06, y is 0.4; (11) a is 1.15, b is 2, c is 0.014, m is 0.18, n is 0.25, x is 0.003, y is 0.26; and (12) a is 1.4, b is 2.45, c is 0.02, m is 0.15, n is 0.0001, x is 0.2, y is 0.5.