Samsung Electronics Co., Ltd.

Samsung Led Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Chul Hee Yoo

Hun Joo Hahm

Hyung Suk Kim

Young Sam Park

Young June Jeong

Seong Yeon Han

Ho Yeon Kim

Ho Sik Ahn

Dae Yeon Kim

Dong Hyun Cho

Chang Ho Shin

Eun Joo Jang

Tae Hyung Kim

Jeong Hee Lee

Hyun A Kang

Jung Woo Lee

Jung Park

Sang Yun Lee

Hyun Ho Lee

Yoon Tak Yang

Myoung Bo Park

A light emitting device package includes a package frame in which a recessed portion is defined in a center thereof, the package frame including, an interior wall surrounding the recessed portion, a step portion contacting the interior wall and a bottom surface of the recessed portion, a light source disposed inside the recessed portion and emitting first light, a substrate disposed on the light source, and fixed on an upper surface of the step portion and spaced apart from the light source, a light conversion layer disposed on the substrate and including quantum dots that absorbs the first light and emits second light having a different wavelength from the first light, and barrier layer at least covering the light conversion layer, where barrier layer includes a first inorganic barrier layer and a first organic barrier layer.

Light emitting device package, method of manufacturing the same, backlight unit and display device including the same

A white light emitting device including: a blue light emitting diode chip having a dominant wavelength of 443 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.

White light emitting device and white light source module using the same

A backlight unit for a liquid crystal device capable of obtaining a high-quality image and reduced in thinness. The backlight unit is disposed below a liquid crystal panel to irradiate light thereoto. A plurality of separate light guide plates define respective blocks. Groups of LEDs each are disposed along an edge of each of the light guiding plates, each of the LED groups emitting light toward a corresponding one of the light guide plates. The each LED group is turned on and off according to the corresponding block.

Backlight unit for liquid crystal display device

A backlight unit includes a flexible printed circuit board having a least one through hole perforated therein, and an LED package disposed on a top portion of the flexible printed circuit board corresponding to the through hole. The LED package is directly bonded onto a bottom plate by a heat conductive adhesive.

Slim type backlight unit with through-hole adhesive heat dissipating means

A backlight unit for a liquid crystal device capable of obtaining a high-quality image and reduced in thinness. The backlight unit is disposed below a liquid crystal panel to irradiate light thereto. A plurality of separate light guide plates define respective blocks. Groups of LEDs each are disposed along an edge of each of the light guiding plates, each of the LED groups emitting light toward a corresponding one of the light guide plates. Each LED group is turned on and off according to the corresponding block.

A dimming structure for an image display device further includes a contrast panel for altering contrast differences in a portion around an outputted image to achieve dimming effects on an image smaller than a light emitting lamp. In the dimming structure, a backlight unit has a plurality of light sources disposed therein. A display panel displays an image while the backlight unit is disposed to light the display panel. A contrast panel is disposed between the backlight unit and the display panel. The contrast panel has a light emitting window formed in a portion thereof corresponding to the image of the display panel to transmit light emitted from the backlight unit therethrough. The dimming structure assures uniform dimming effects on the portion around the image despite use of a light source bigger than the image to be outputted.

Dimming structure for image display device

A backlight unit of the invention is reduced in thickness, weight and manufacturing costs but improved in heat releasing efficiency. In the backlight unit, a flexible printed circuit board has at least one through hole perforated therein. An LED package is disposed on a top portion of the flexible printed circuit board corresponding to the through hole. The backlight unit of the invention employs the flexible printed circuit board in place of a metal printed circuit board as a means to conduct current to the LED package. This produces a slimmer and lighter backlight unit and also saves manufacturing costs. In addition, the LED package is directly bonded onto a bottom plate by a heat conducting adhesive, thereby ensuring heat generated from the LED package to be released more quickly.

There are provided a plane light source and an LCD backlight unit having the same. A plane light source including light emitting device matrixes each having a plurality of light emitting devices arranged in rows and columns on a substrate according to an aspect of the invention includes: a first matrix having a plurality of light emitting devices arranged in rows and columns; and a second matrix having a plurality of light emitting devices arranged in rows and columns, the light emitting devices each located within a rectangle formed by four adjacent light emitting devices included in the first matrix, and forming angles &#x3b8; satisfying the condition of 45&#xb0;&#x2266;&#x3b8;&#x2266;55&#xb0; therebetween on the basis of a horizontal direction, wherein among pitches between one light emitting devices included in the light emitting device matrixes and another lighting light emitting device adjacent to the light emitting device, a pitch P1 between the light emitting device and the light emitting device diagonally across from the light emitting device satisfies the condition of 25 mm&#x2266;P&#x2266;29 mm, and a pitch Pbetween the light emitting device and another light emitting device located in a horizontal direction satisfies the condition of 34 mm&#x2266;P&#x2266;38 mm.

Plane light source and LCD backlight unit having the same

There is provided a surface light source using white light emitting diodes including: a plurality of white light emitting diodes arranged at a predetermined distance from one another, wherein the white light emitting diodes are arranged such that a light emitting diode unit defined by each of the white light emitting diodes and corresponding ones of the white light emitting diodes disposed at a closest distance from the each white light emitting diode has a central light amount ranging from 80% to 120% with respect to an average light amount of the white light emitting diodes.

Surface light source using white light emitting diodes and liquid crystal display backlight unit having the same

There is provided a backlight unit including: a chassis having an insulating layer formed on a top thereof; a circuit pattern formed on the insulating layer; a plurality of light emitting diodes formed on the insulating layer to electrically connect to the circuit pattern.

Backlight unit having light emititng diodes and method of manufacturing the same

There are provided a plane light source and an LCD backlight unit having the same. A plane light source including light emitting device matrixes each having a plurality of light emitting devices arranged in rows and columns on a substrate according to an aspect of the invention includes: a first matrix having a plurality of light emitting devices arranged in rows and columns; and a second matrix having a plurality of light emitting devices arranged in rows and columns, the light emitting devices each located within a rectangle formed by four adjacent light emitting devices included in the first matrix, and forming angles &#x3b8; satisfying the condition of 45&#xb0;&#x2266;&#x3b8;&#x2266;55&#xb0; therebetween on the basis of a horizontal direction, wherein among pitches between one light emitting devices included in the light emitting device matrixes and another lighting light emitting device adjacent to the light emitting device, a pitch Pbetween the light emitting device and the light emitting device diagonally across from the light emitting device satisfies the condition of 25 mm&#x2266;P&#x2266;29 mm, and a pitch Pbetween the light emitting device and another light emitting device located in a horizontal direction satisfies the condition of 34 mm&#x2266;P&#x2266;38 mm.

Growing community of inventors

Gyunggi-do, South Korea

Chul Hee Yoo