Patent ID: 11923485
Assignee: GRIREM ADVANCED MATERIALS CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. An optical device, comprising an LED chip, a visible-light luminescent material and a near-infrared luminescent material, wherein
a luminous power of light emitted by the near-infrared and visible-light luminescent materials in a band of 650-1000 nm under the excitation of the LED chip is A;
a sum of a luminous power of light emitted by the near-infrared and visible-light luminescent materials in a band of 350-650 nm under the excitation of the LED chip and a luminous power of residual light emitted by the LED chip in the band of 350-650 nm after the LED chip excites the near-infrared and visible-light luminescent materials is B; and
B/A*100% is 0.1%-10%; and
the LED chip in the optical device has a peak-emission wavelength in a range of 420-470 nm; and a mixture of the light emitted by the visible-light and near-infrared luminescent materials under the excitation of the LED chip and the residual light of the LED chip after the excitation has a color temperature of 1000-5000 K.