Seoul Viosys Co., Ltd.

Ho Joon Lee

Jong Hyeon Chae

Seong Gyu Jang

Chung Hoon Lee

Chang Yeon Kim

Seom Geun Lee

Chan Seob Shin

Jong Min Jang

Seong Kyu Jang

Dae Sung Cho

A light emitting diode stack for a display including a first LED stack, a second LED stack disposed on the first LED stack, a third LED stack disposed on the second LED stack, and a conductive growth substrate coupled to at least one of the second LED stack and the third LED stack, in which light generated from the first LED stack is configured to be emitted to the outside of the light emitting diode stack through the second LED stack, the third LED stack, and the conductive growth substrate, and light generated from the second LED stack is configured to be emitted to the outside of the light emitting diode stack through the third LED stack and the conductive growth substrate.

Light emitting diode for display and display apparatus having the same

A light emitting device for a display including a transparent member laterally extending in a first direction and having a first region and a second region surrounding the first region, first to third light emission regions disposed on the transparent member, a support substrate, first to fourth electrode pads disposed between the transparent member and the support substrate, and vias electrically connecting the electrode pads to the light emission regions, respectively, in which the fourth electrode pad is electrically connected to at least one of the vias, each light emission region is disposed in the first region and does not overlap the second region in a second direction, and the fourth electrode pad overlaps one of the vias and one of the light emission regions in the second direction, and the one of the vias and the one of the light emission regions are separated from each other.

LED unit for display and display apparatus having the same

A light emitting diode pixel for a display including a first LED sub-unit, a second LED sub-unit disposed on a first portion of the first LED sub-unit, and a third LED sub-unit disposed on a second portion of the second LED sub-unit, in which each of the first, second, and third LED sub-units includes a first conductivity type semiconductor layer and a second conductivity type semiconductor layer, light generated from the first LED sub-unit is configured to be emitted outside of the light emitting diode pixel through a third portion of the first LED sub-unit different from the first portion, and light generated from the second LED sub-unit is configured to be emitted outside of the light emitting diode pixel through a fourth portion of the second LED sub-unit different from the second portion.

Lighting emitting stacked structure and display device having the same

A light emitting device for a display including first, second, and third LED stacks each including a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer; first, second, and third transparent electrodes in ohmic contact with the first, second, and third LED stacks, respectively; a first electrode pad disposed on the first conductivity type semiconductor layer of the third LED stack; a lower second electrode pad disposed on the third transparent electrode; first, second, and third bump pads disposed on the first LED stack and electrically connected to the first, second, and third LED stacks, respectively; and a common bump pad commonly electrically connected to the first, second, and third LED stacks, in which a lower surface of the first electrode pad is located at a different elevation from a lower surface of the lower second electrode pad.

Light emitting device including electrode pads with lower surfaces at different elevations or having different thicknesses

A light emitting device for a display including a first LED sub-unit, a second LED sub-unit disposed on the first LED sub-unit, a third LED sub-unit disposed on the second LED sub-unit, electrode pads disposed below the first LED sub-unit, and a planarization layer disposed between the first and second LED sub-units and being light transmissive, in which the electrode pads include a common electrode pad electrically connected in common to the first, second, and third LED sub-units, first, second, and third electrode pads connected to the first, second, and third LED sub-units, respectively, the first, second, and third LED sub-units are independently drivable, light generated in the first LED sub-unit is configured to be emitted to the outside through the second and third LED sub-units, and light generated in the second LED sub-unit is configured to be emitted to the outside through the third LED sub-unit.

Light emitting device with LED stack for display and display apparatus having the same

A light emitting device for a display including a circuit board, a plurality of light emitting units arranged on the circuit board, each light emitting unit comprising a first LED stack including a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, a first electrode disposed on the first conductivity type semiconductor layer, and a second electrode disposed on the second conductivity type semiconductor layer, a plurality of bump pads disposed between the plurality of light emitting units and the circuit board, and a bonding layer disposed between the second electrode and the circuit board, in which the second electrode has a side surface recessed inwardly with respect to a side surface of the light emitting unit to define a recessed portion, and the bonding layer is filled in the recessed portion.

Light emitting device for display having LED stacks

A light emitting device for a display including a first LED sub-unit laterally extending along a first direction, a second LED sub-unit, and a third LED sub-unit, electrode pads each overlapping at least a portion of the first LED sub-unit along a vertical direction and electrically connected to at least one of the first, second, and third LED sub-units, a lower insulation layer having a first surface extending in the first direction, a molding member covering each of the first LED sub-unit, the second LED sub-unit, and the third LED sub-unit, and lead electrodes electrically connected to the electrode pads and extending along the first surface and a side surface of the lower insulation layer, in which a portion of an outer region of each of the lead electrodes is disposed inside the outer boundary of the molding member when viewed in a cross-section.

A display panel including a circuit board having pads, light emitting devices electrically connected to the pads and arranged on the circuit board, each light emitting device having a first surface facing the circuit board and a second surface opposite to the first surface, a buffer material layer disposed between the circuit board and the light emitting devices to fill a space between the circuit board and the light emitting devices, and a cover layer covering the second surface of the light emitting devices, in which the buffer material layer is disposed under the first surfaces of the light emitting devices and has grooves in a region between adjacent light emitting devices, a portion of a top surface of the buffer material layer is disposed between adjacent light emitting devices, and the cover layer fills the grooves of the buffer material layer.

LED display panel, LED display apparatus having the same and method of fabricating the same

A light module including a circuit substrate and a light emitter, the light emitter including a light source configured to generate light and including a first epitaxial layer, a second epitaxial layer, and an active layer, an insulation layer covering the light source, a first electrode electrically connected to the first epitaxial layer, a light guide configured to guide light generated from the light source, a transparent material covering the light source, and an angle controller disposed on the transparent material, in which the light guide has a guide hole filled with the transparent material, and a refractive index of the light guide is different from that of the light source.

Light emitting stacked structure including epitaxial layers connecting with electrodes and display device having the same

A light emitting diode pixel for a display includes a first subpixel including a first LED sub-unit, a second subpixel including a second LED sub-unit, a third subpixel including a third LED sub-unit, and a bonding layer overlapping the first, second, and third subpixels, in which each of the first, second, and third LED sub-units includes a first type of semiconductor layer and a second type of semiconductor layer, each of the first, second, and third LED sub-units is disposed on a different plane, and light generated from the second subpixel is configured to be emitted to an outside of the light emitting diode pixel by passing through a lesser number of LED sub-units than light generated from the first subpixel and emitted to the outside.

A display device including a substrate, a light emitting stacked structure disposed on the substrate and including a plurality of epitaxial sub-units disposed one over another, a first adhesive layer bonding the epitaxial sub-units to the substrate; and a line part disposed on the substrate and configured to apply a light emitting signal to each of the epitaxial sub-units, in which the light emitting stacked structure is configured to provide light having various colors by a combination of light emitted from each of the epitaxial sub-units, and the first adhesive layer includes a conductive and non-transparent material.

Light emitting stacked structure and display device having the same

A light emitting device including a first LED sub-unit having a thickness in a first direction, a second LED sub-unit disposed on a portion of the first LED sub-unit in the first direction, each of the first and second LED sub-units comprising a first-type semiconductor layer, a second-type semiconductor layer, and an active layer, a reflective electrode disposed adjacent to the first LED sub-unit and electrically connected to the first-type semiconductor layer of the first LED sub-unit, and a first ohmic electrode forming ohmic contact with the second-type semiconductor layer of the first LED sub-unit, in which the active layer of the first LED sub-unit is configured to generate light, includes AlGaInP (0≤x≤1, 0≤y≤1), and overlaps the active layer of the second LED sub-unit in the first direction, and the active layer of the second LED sub-unit includes the same material as the active layer of the first LED sub-unit.

A method of fabricating a light emitting device for a display, the method including the steps of growing a first LED stack on a first growth substrate, the first LED stack including a first conductivity type semiconductor layer and a second conductivity type semiconductor layer, growing a second LED stack on a second growth substrate, the second LED stack including a first conductivity type semiconductor layer and a second conductivity type semiconductor layer, bonding the second LED stack to a first temporary substrate, removing the second growth substrate from the second LED stack, bonding the second LED stack to the first LED stack, and removing the first temporary substrate from the second LED stack.

Light emitting device for display and display apparatus having the same

A display apparatus including a substrate, and pixel regions and at least one separation region between the pixel regions, each pixel region including a first LED stack, a second LED stack adjacent to the first LED stack, a third LED stack adjacent to the second LED stack and each having a side surface forming a first angle, a second angle, and a third angle with the substrate, respectively, electrode pads electrically connected to the first, second, and third LED stacks, and an insulation layer disposed on at least one of the first, second, and third LED stacks, in which the first LED stack is configured to emit light having a longer peak wavelength than that emitted from the second and third LED stacks, and the first angle is different from the second and third angles.

A light emitting diode pixel for a display including a first LED sub-unit, a second LED sub-unit disposed on a portion of the first LED sub-unit, a third LED sub-unit disposed on a portion of the second LED sub-unit, and a reflective electrode disposed adjacent to the first LED sub-unit, in which each of the first to third LED sub-units comprises an n-type semiconductor layer and a p-type semiconductor layer, each of the n-type semiconductor layers of the first, second, and third LED stacks is electrically connected to the reflective electrode, and the first LED sub-unit, the second LED sub-unit, and the third LED sub-unit are configured to be independently driven.

Growing community of inventors

Ansan-si, South Korea

Ho Joon Lee