Seoul Semiconductor Co., Ltd.

Young Jun Song

Hyuck Jung Choi

Eun Ju Kim

Jung Hwa Jung

Da Hye Kim

Seoung Ho Jung

Il Kyung Suh

Tae Kwang Kim

Yeoun Chul Shon

Ii Kyung Suh

Lae Hyun Kim

A backlight unit includes one or more light sources operable to emit light and a light guide plate arranged adjacent to the one or more light sources, reflected lights exiting the one or more light sources via the second surfaces and entering the light guide plate. A light source includes a light emitting device having a substrate and a semiconductor stack disposed on the substrate. The reflector is structured and positioned to block light emitted from a first surface of the light emitting device by reflecting the light emitted from the first surface toward second surfaces of the light source.

Light source module and backlight unit having the same

A backlight unit including a light guide plate, a first light source and a second light source adjacent to the light guide plate, each of the light sources including a light emitting diode chip including a substrate and a semiconductor stack disposed on the substrate, a wavelength conversion layer covering the light emitting diode chip, and a plurality of reflectors disposed on at least two opposing side surfaces of the light emitting diode chip, in which at least a portion of the wavelength conversion layer of the first light source facing the second light source is exposed by the reflectors.

A backlight unit including a backlight module and a backlight control module. The backlight module includes a printed circuit board including blocks arranged in an M&#xd7;N matrix, in which M and N are natural numbers of 2 or greater, and M blocks are arranged in a horizontal direction and N blocks are arranged in a vertical direction, and at least one light emitting device disposed on each of the blocks. The backlight control module is configured to perform a dimming control of the M&#xd7;N blocks such that the at least one light emitting device in one block can be controlled independently from other light emitting devices disposed in the remaining blocks that are disposed in the horizontal direction and in the vertical direction with respect to the one block.

Backlight module with MJT LED and backlight unit including the same

Embodiments of the disclosure provide a backlight module using MJT LEDs and a backlight unit including the same. More specifically, embodiments of the disclosure provide a backlight module, which includes MJT LEDs configured to increase an effective light emitting area of each of light emitting cells and optical members capable of uniformly dispersing light emitted from the MJT LEDs. In addition, embodiments of the disclosure provide a backlight unit using the backlight module, thereby reducing the number of LEDs constituting the backlight unit while allowing operation at low current.

A direct type backlight unit disposed under a liquid crystal panel includes a backlight module including a printed circuit board including blocks arranged in an M&#xd7;N matrix, in which M and N are natural numbers of 2 or greater, light emitting devices disposed on the printed circuit board such that at least one light emitting device is disposed in each block, each of the light emitting devices including light emitting cells disposed on a single substrate, and optical members disposed on the light emitting devices, each of the optical members being configured to change a light beam distribution of a corresponding light emitting device, and a backlight control module configured to control dimming levels of the light emitting devices and to independently control the light emitting devices disposed in different blocks.

A backlight unit includes a backlight module with a printed circuit board including blocks and MJT LEDs disposed on the blocks, respectively and a backlight control module generating a signal for drive control of each of the blocks, wherein each of the blocks comprises at least one MJT LED, and the backlight control module includes a drive controller for On/Off control and dimming control of each of the blocks.

Backlight unit using multi-cell light emitting diode

Disclosed herein is a light device of a vehicle including: a light emitting diode module emitting light; and a light guide plate having a side on which the light emitted from the light emitting diode module is incident and emitting the light incident on the side to perform surface emission upwardly, in which the light guide plate has a plane shape including at least one concave portion and the light emitting diode module is installed in the at least one concave portion. According to the exemplary embodiments of the present invention, when the light guide plate used in the light device installed at the rear of the vehicle to perform the surface emission is formed in a horseshoe shape or a ring shape, the light emitting diode module may be installed at a concave position of the horseshoe shape or the light emitting diode module may be installed along a ring-shaped inner side, thereby uniformly performing the surface emission over the whole of the light guide plate.

Light device of vehicle

A backlight unit includes: a light guide plate of an entirely flat structure; a light emitting element disposed on at least one side of the light guide plate; a first reflection part disposed under the light guide plate and having one side thereof extended to a region where the light emitting element is positioned; a second reflection part disposed on the light emitting element; and a housing for accommodating the light guide plate, the light emitting element, and the first and second reflection parts, wherein the housing has a second side which is vertically extended upwards with respect to a first side which defines a lateral cross section of the housing in which the light emitting element is accommodated as the lower side, and a third side which is vertically extended inwards with respect to the second side.

Growing community of inventors

Ansan-si, South Korea

Young Jun Song