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 (OP) and ii) a light guide plate configured to guide the emitted light to the display panel, wherein the LED package comprises: a housing (MD) having a light reflecting property and comprising i) a bottom portion (BP), ii) a sidewall portion (SP) connected to the bottom portion, and iii) a cover portion (CP) connected to the sidewall portion, wherein the opening (OP) is defined in the sidewall portion (SP) 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 (FS), and wherein the sidewall portion (SP) comprises three sidewalls, wherein a third sidewall (SW3) of the three sidewalls (SW1, SW2, SW3) opposes the opening (OP), and the cover portion (CP) is inclined in a direction from said third sidewall (SW3) opposing the opening and toward the opening (OP), so that in a cross-sectional view, the cover portion (CP) has an inclined angle with respect to a first upper surface (US1) of a first LED (LD1) and a second upper surface (US2) of a second LED (LD2). a display panel ; and a backlight assembly comprising i) a light-emitting diode, LED, package configured to output light via an opening (OP) and ii) a light guide plate configured to guide the emitted light to the display panel, wherein the LED package comprises: a housing (MD) having a light reflecting property and comprising i) a bottom portion (BP), ii) a sidewall portion (SP) connected to the bottom portion, and iii) a cover portion (CP) connected to the sidewall portion, wherein the opening (OP) is defined in the sidewall portion (SP) 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 (MD) having a light reflecting property and comprising i) a bottom portion (BP), ii) a sidewall portion (SP) connected to the bottom portion, and iii) a cover portion (CP) connected to the sidewall portion, wherein the opening (OP) is defined in the sidewall portion (SP) 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 (FS), and wherein the sidewall portion (SP) comprises three sidewalls, wherein a third sidewall (SW3) of the three sidewalls (SW1, SW2, SW3) opposes the opening (OP), and the cover portion (CP) is inclined in a direction from said third sidewall (SW3) opposing the opening and toward the opening (OP), so that in a cross-sectional view, the cover portion (CP) has an inclined angle with respect to a first upper surface (US1) of a first LED (LD1) and a second upper surface (US2) of a second LED (LD2). <EOS>