Samsung Electronics Co., Ltd.

Jeongeun Yun

Seongmin Kim

Wonjun Lee

Jongchul Choi

Kyounghoon Kim

Sungwoo Choi

Jeongrok Oh

Chulsoo Yoon

Chohui Kim

Seulgee Lee

Kyookeun Lee

Myongjo Choi

Kyusub Kwak

Mi Hyae Park

Minhee Noh

A light emitting device includes a first light emitter including a first light emitting chip emitting first blue light and at least one among a first phosphor and a second phosphor, the first light emitter being configured to emit second blue light, and a second light emitter including a second light emitting chip emitting third blue light and at least one among a third phosphor and a fourth phosphor, the second light emitter being configured to emit fourth blue light, wherein a ratio of an intensity of a peak wavelength of the fourth blue light to an intensity of a peak wavelength of the second blue light is greater than or equal to 0.6.

Light emitting device for display and backlight unit including the same

A white light emitting device is provided. The white light emitting device includes a blue light emitting diode configured to emit blue light having a peak wavelength in a first range of 440 nm to 455 nm; a first wavelength conversion material, based on being excited by the blue light, emits first light having a peak wavelength in a second range of 535 nm to 550 nm and a full width at half maximum (FWHM) of 60 nm or less; and a second wavelength conversion material, based on being excited by the blue light, emits second light having a peak wavelength in a third range of 620 nm to 660 nm, wherein a melanopic photopic ratio of white light emitted from the white light emitting device is 0.65 or less, and a color rendering index (CRI) of the white light is 80 or more.

White light emitting device and lighting apparatus

A light emitting diode (LED) module that is configured to emit white light is provided. The LED module includes: a blue light emitting diode configured to emit blue light having a first peak wavelength of 420 nm to 465 nm; at least one wavelength conversion material that is configured to convert a portion of the blue light into converted light of a different wavelength; and a near-infrared light source configured to emit additional light having a second peak wavelength in a range of 740 nm to 900 nm and a full width at half maximum (FWHM) of 120 nm or less. The converted light, another portion of the blue light, and the additional light combine to form the white light.

LED module and lighting apparatus

An LED lighting apparatus, including an LED light source configured to emit white light having a first melanopic/photopic (M/P) ratio; a tuning LED light source configured to emit tuning blue light having a peak wavelength in a range of 465 nm to 495 nm; and a driving control unit configured to control currents respectively applied to the LED light source and the tuning LED light source to generate tuned white light having a second M/P ratio higher than the first M/P ratio

LED lighting apparatus

An electronic device for displaying augmented reality (AR) includes: an optical engine configured to output light of virtual image; a waveguide from which the light of the virtual image is output and through which light of a real scene is transmitted; an optical shutter configured to transmit or block the light of the real scene; a focus tunable lens configured to adjust a focal length for the light of the virtual image output from the waveguide; and one or more processors configured to, during a first period, control the optical shutter to block at least part of a first light of the real scene, and control the focus tunable lens to have a first focal length, and during a second period, control the optical shutter to transmit a second light of the real scene, and control the focus tunable lens to have a second focal length different from the first focal length.

Electronic device and method for displaying augmented reality

Systems and methods are described for a white light emitting module that emits a third white light with the goal of providing human-friendly illumination. The white light emitting device comprise a first light emitting package that emits a first white light and a second light emitting package that emits a second white light. The first light emitting package includes a first light emitting device and a filter member that filters light emitted from the first light emitting device and then reduces a color temperature of the first white light. The second light emitting package includes second and third light devices. The color temperature of the first white light is about 1,500 K to about 4,000 K. A color temperature of the second white light is about 3,000 K to 10,000 K.

White light emitting module

An electronic device for displaying AR includes: an optical engine; a first polarizer; a polarization converter configured to maintain or convert a polarization direction of light of a real scene; a waveguide from which light of a virtual image is output and through which the light of the real scene is transmitted; a focus tunable lens; a second polarizer; and one or more processors. The one or more processors are configured to, during a first period, control the polarization converter to convert a polarization direction of a first light of the real scene such that at least part of the first light of the real scene is blocked by the second polarizer, and during a second period, control the polarization converter to maintain a polarization direction of a second light of the real scene such that the second light of the real scene is transmitted through the second polarizer.

Growing community of inventors

Suwon-si, South Korea

Jeongeun Yun