Backlight unit and liquid crystal display device including the same

A backlight unit, comprising:

• a circuit board;
• a plurality of LED packages mounted on the circuit board;
• an encapsulation member over the circuit board and covering the plurality of LED packages;
• and
• a multi-pattern sheet over the encapsulation member and including
• a glass complex body containing a phosphor,
• a plurality of diffusion patterns on an upper surface of the glass complex body, and
• a plurality of reflective patterns on a lower surface of the glass complex body,
• wherein the plurality of diffusion patterns includes a plurality of first patterns, each of the first patterns aligned with a respective LED package of the plurality of LED packages along a first direction, and a plurality of second patterns, each of the second patterns aligned with a respective portion between adjacent LED packages of the plurality of LED packages along the first direction and alternating the each of the first patterns such that a single second pattern is disposed between adjacent first patterns of the plurality of first patterns,
• wherein at least one of the LED packages, at least one of the reflective patterns, and at least one of the first patterns overlap each other,
• wherein the first patterns and the second patterns are different patterns,
• wherein the single second pattern is a single horn having a vertex, and the single horn is disposed between the adjacent first patterns, and
• wherein a width of a bottom surface of the single horn contacting the upper surface of the glass complex body is smaller than a width of a bottom surface of each of the adjacent first patterns contacting the upper surface of the glass complex body.

A liquid crystal display device, comprising:

• a liquid crystal panel;
• and
• a backlight unit under the liquid crystal panel and including:
• a circuit board;
• a plurality of LED packages mounted on the circuit board;
• an encapsulation member over the circuit board and covering the plurality of LED packages;
• and
• a multi-pattern sheet over the encapsulation member and including
• a glass complex body containing a phosphor, and
• a plurality of diffusion patterns on an upper surface of the glass complex body,
• wherein the plurality of diffusion patterns includes a plurality of first patterns, each of the first patterns aligned with a respective LED package of the plurality of LED packages along a first direction, and a plurality of second patterns, each of the second patterns aligned with a respective portion between adjacent LED packages of the plurality of LED packages along the first direction and alternating the each of the first patterns such that a single second pattern is disposed between adjacent first patterns of the plurality of first patterns, each of the plurality of first patterns being spaced from each single pattern of the plurality of second patterns,
• wherein the first patterns and the second patterns are different patterns,
• wherein the single second pattern is a single horn having a vertex, and the single horn is disposed between the adjacent first patterns, and
• wherein a width of a bottom surface of the single horn contacting the upper surface of the glass complex body is smaller than a width of a bottom surface of each of the adjacent first patterns contacting the upper surface of the glass complex body.

A backlight unit, comprising:

• a circuit board;
• a plurality of LED packages mounted on the circuit board;
• an encapsulation member over the circuit board and covering the plurality of LED packages;
• and
• a multi-pattern sheet over the encapsulation member and including
• a glass complex body containing a phosphor, and
• a plurality of diffusion patterns on an upper surface of the glass complex body,
• wherein the plurality of diffusion patterns includes a plurality of first patterns, two first patterns aligned with a respective LED package of the plurality of LED packages along a first direction, and a plurality of second patterns, two second patterns aligned with a respective portion between adjacent LED packages of the plurality of LED packages along the first direction and alternating the two first patterns,
• wherein the two first patterns have a same size, and the two second patterns have a same size,
• wherein the first patterns and the second patterns are different patterns, and
• wherein a width of a bottom surface of each of the two second patterns contacting the upper surface of the glass complex body is smaller than a width of a bottom surface of each of the two first patterns contacting the upper surface of the glass complex body.