A display device, comprising: a display panel; and a backlight assembly comprising i) a light-emitting diode, LED, package configured to output light via an opening and ii) a light guide plate configured to guide the emitted light to the display panel, wherein the LED package comprises: a housing having a light reflecting property and comprising i) a bottom portion, ii) a sidewall portion connected to the bottom portion, and iii) a cover portion connected to the sidewall portion, wherein the opening is defined in the sidewall portion and faces the light guide plate; a plurality of light-emitting diodes, LEDs, (LD1, LD2) accommodated in the housing; a plurality of lead frames (LF1, LF2, LF3) placed on the bottom portion and electrically connected to the LEDs; and a plurality of insulating layers covering the LEDs and arranged along a first direction that extends from the light guide plate to the opening; wherein the LEDs are arranged in the first direction;, wherein at least one of the insulating layers comprises fluorescent materials, and wherein the sidewall portion comprises three sidewalls, wherein a third sidewall of the three sidewalls (SW1, SW2, SW3) opposes the opening, and the cover portion is inclined in a direction from said third sidewall opposing the opening and toward the opening, so that in a cross-sectional view, the cover portion has an inclined angle with respect to a first upper surface of a first LED and a second upper surface of a second LED. a display panel; and a backlight assembly comprising i) a light-emitting diode, LED, package configured to output light via an opening and ii) a light guide plate configured to guide the emitted light to the display panel, wherein the LED package comprises: a housing having a light reflecting property and comprising i) a bottom portion, ii) a sidewall portion connected to the bottom portion, and iii) a cover portion connected to the sidewall portion, wherein the opening is defined in the sidewall portion and faces the light guide plate; a plurality of light-emitting diodes, LEDs, (LD1, LD2) accommodated in the housing; a plurality of lead frames (LF1, LF2, LF3) placed on the bottom portion and electrically connected to the LEDs; and a plurality of insulating layers covering the LEDs and arranged along a first direction that extends from the light guide plate to the opening; a housing having a light reflecting property and comprising i) a bottom portion, ii) a sidewall portion connected to the bottom portion, and iii) a cover portion connected to the sidewall portion, wherein the opening is defined in the sidewall portion and faces the light guide plate; a plurality of light-emitting diodes, LEDs, (LD1, LD2) accommodated in the housing; a plurality of lead frames (LF1, LF2, LF3) placed on the bottom portion and electrically connected to the LEDs; and a plurality of insulating layers covering the LEDs and arranged along a first direction that extends from the light guide plate to the opening; wherein the LEDs are arranged in the first direction;, wherein at least one of the insulating layers comprises fluorescent materials, and wherein the sidewall portion comprises three sidewalls, wherein a third sidewall of the three sidewalls (SW1, SW2, SW3) opposes the opening, and the cover portion is inclined in a direction from said third sidewall opposing the opening and toward the opening, so that in a cross-sectional view, the cover portion has an inclined angle with respect to a first upper surface of a first LED and a second upper surface of a second LED.