Back to results
US 7,906,789 B2Granted
Warm white light emitting apparatus and back light module comprising the same
AssigneeSeoul Semiconductor Co., Ltd.
InventorsJung Hwa Jung, Sang Min Lee
Life of this patent
Estimating the term…
Abstract
A warm white light emitting apparatus includes a first light emitting diode (LED)-phosphor combination to generatea base light that is white or yellowish white and a second LED-phosphor combination to generate a Color Rendering Index (CRI) adjusting light. The base light the CRI adjusting light together make a warm white light having a color temperature of 2500 to 4500 K.
Claims36
A warm white light emitting apparatus, comprising:
- a first light emitting diode (LED)-phosphor combination to generate a base light, the base light being white or yellowish white;
- and
- a second LED-phosphor combination to generate a Color Rendering Index (CRI) adjusting light,
- wherein the base light and the CRI adjusting light together make a warm white light having a color temperature of 2500 to 4500K.
1 more element
A backlight module, comprising:
- a light guide plate;
- and
- a warm white light emitting apparatus to supply light to a side surface of the light guide plate,
- wherein the warm white light emitting apparatus comprises a first light emitting diode (LED)-phosphor combination to generate a base light, the base light being white or yellowish white, and a second LED-phosphor combination to generate a Color Rendering Index (CRI) adjusting light,
- wherein the base light and the CRI adjusting light together make a warm white light.
2 more elements
A warm white light emitting apparatus, comprising:
- a first combination of a blue light emitting diode (LED) having a peak wavelength of 400 to 470 nm and at least one phosphor having a peak wavelength of 500 to 600 nm, the first combination to generate a base light, the base light being white or yellowish white;
- and
- a second combination of a blue LED having a peak wavelength of 400 to 470 nm and at least one phosphor having a peak wavelength greater than 600 nm, the second combination to generate a Color Rendering Index (CRI) adjusting light,
- wherein the base light and the CRI adjusting light together make a warm white light.
1 more element
A warm white light emitting apparatus, comprising:
- a first combination of a blue light emitting diode (LED) having a peak wavelength of 400 to 470 nm and at least one phosphor having a peak wavelength of 500 to 600 nm, the first combination to generate a base light, the base light being white or yellowish white;
- and
- a second combination of an ultra violet (UV) LED having a peak wavelength of 250 to 400 nm and at least one phosphor having a peak wavelength greater than 600 nm, the second combination to generate a Color Rendering Index (CRI) adjusting light,
- wherein the base light and the CRI adjusting light together make a warm white light.
1 more element
Dependencies are inferred from the claim text.