Optical assembly, backlight unit and display apparatus thereof

An optical assembly, comprising:

• a first layer;
• a plurality of light sources disposed over the first layer;
• and
• a second layer disposed above the first layer and covering the plurality of light sources, the second layer including a plurality of patterns respectively corresponding to the plurality of light sources for selectively reflecting light emitted from the plurality of light sources,
• wherein each of the plurality of patterns corresponds to one of the plurality of light sources that is located closest to said each of the plurality of patterns,
• the plurality of patterns are formed by depositing, printing, or coating,
• at least one of the light sources has a light emitting surface that faces a lateral direction and emits light to the side,
• a center of at least one of the patterns is disposed a predetermined distance from a center of the corresponding closest light source in the lateral direction, and
• a width of each of the plurality of patterns in the lateral direction is greater than a width of the corresponding closest light source in the lateral direction.

A backlight unit, comprising:

• a substrate;
• a plurality of light sources mounted on the substrate;
• a reflection layer disposed on the substrate through the plurality of light sources;
• a transparent film disposed above the reflection layer;
• a resin layer formed between the reflection layer and the transparent film;
• and
• a plurality of reflection patterns formed on the transparent film to correspond to a position of each light source,
• wherein each reflection pattern is formed with a different material from the resin and by printing the transparent film with a plurality of dots,
• wherein a center of at least one reflection pattern is disposed a predetermined distance from a center of a corresponding closest light source in a lateral direction, and
• wherein a width of each of the plurality of reflection patterns in the lateral direction is greater than a width of the corresponding closest light source in the lateral direction.

A display apparatus, comprising:

• a display panel positioned above a backlight unit,
• wherein the backlight unit includes:
• a substrate;
• a plurality of light sources mounted on the substrate;
• a reflection layer disposed on the substrate through the plurality of light sources;
• a transparent film disposed above the reflection layer;
• a resin layer formed between the reflection layer and the transparent film;
• and
• a plurality of reflection patterns formed on the transparent film to correspond to a position of each light source,
• wherein each reflection pattern is formed with a different material from the resin and by printing the transparent film with a plurality of dots,
• wherein a center of at least one reflection pattern is disposed a predetermined distance from a center of a corresponding closest light source in a lateral direction, and
• wherein a width of each of the plurality of reflection patterns in the lateral direction is greater than a width of the corresponding closest light source in the lateral direction.