Display apparatus

A display apparatus, comprising:

• a circuit board having a driving circuit, and first bonding electrodes connected to the driving circuit;
• and
• a pixel array on the circuit board, and having a display area in which pixel units are arranged, and a peripheral area adjacent to the display area, each of the pixel units including a plurality of sub-pixels, the pixel array including:
• a plurality of LED cells arranged to correspond to the plurality of sub-pixels in the display area, each of the plurality of LED cells including a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer;
• a partition structure on the plurality of LED cells, and providing a plurality of sub-pixel spaces in regions respectively corresponding to the plurality of LED cells;
• a plurality of wavelength converters in the plurality of sub-pixel spaces, respectively;
• a partition reflective layer having a first portion on an upper surface of the partition structure, and a second portion on sidewalls of the partition structure, the first portion having a thickness that is greater than a thickness of the second portion, wherein the thickness of the first portion is in a direction perpendicular to, and overlapping, the upper surface of the partition structure, and the thickness of the second portion is in a direction perpendicular to a respective sidewall of the partition structure;
• a passivation layer on lower surfaces and side surfaces of the plurality of LED cells;
• a first reflective electrode on the passivation layer, extending along a region between the plurality of LED cells, and electrically connected to the first conductivity-type semiconductor layer of each of the plurality of LED cells;
• second bonding electrodes respectively disposed on the first reflective electrode and respectively connected to the first bonding electrodes;
• second reflective electrodes respectively disposed on the lower surfaces of the plurality of LED cells, and respectively electrically connected to the second conductivity-type semiconductor layer of each of the plurality of LED cells;
• a common electrode in the peripheral area and connected to the second reflective electrodes;
• and
• a pad electrode in the peripheral area and electrically connected to the driving circuit.

A display apparatus, comprising:

• a circuit board including a driving circuit and first bonding electrodes;
• and
• a pixel array on the circuit board, and having pixel units, each of the pixel units including a plurality of sub-pixels, the pixel array including:
• a plurality of LED cells arranged to correspond to the plurality of sub-pixels, each of the plurality of LED cells including a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer sequentially stacked on the circuit board;
• wavelength converters on upper surfaces of the plurality of LED cells;
• a partition structure on the upper surfaces of the plurality of LED cells, surrounding side surfaces of the wavelength converters, and separating the wavelength converters from each other;
• a partition reflective layer extending along an upper surface of the partition structure and extending along sidewalls of the partition structure, the partition reflective layer having a thickness above the upper surface of the partition structure in a vertical direction that is greater than a thickness of the partition reflective layer in a horizontal direction adjacent to one of the sidewalls of the partition structure;
• second bonding electrodes connected to the first bonding electrodes;
• a first reflective electrode connected to the first conductivity-type semiconductor layer of each of the plurality of LED cells, and connected to the driving circuit through a portion of the first and second bonding electrodes;
• and
• second reflective electrodes connected to the second conductivity-type semiconductor layer of each of the plurality of LED cells, and connected to the driving circuit through other portions of the first and second bonding electrodes.