Light-condensing member, method of manufacturing the same and display apparatus having the same
A light-condensing member includes a base plate, a main light-condensing pattern formed on the base plate, and a sub light-condensing pattern formed on the main light-condensing pattern. The main light-condensing pattern includes a plurality of main prisms extended in a first direction. A cross section of a main prism taken along a second direction substantially perpendicular to the first direction has a substantially triangular shape. The sub light-condensing pattern includes a plurality of sub prisms formed on the main prisms and extended in a second direction substantially perpendicular to the first direction. A cross section of a sub prism taken along the first direction has a substantially triangular shape. Since light is condensed simultaneously in both a horizontal direction and a vertical direction through one light-condensing member, manufacturing costs and the thickness of backlight assembly are reduced.
1. A light-condensing member comprising:
a base plate;
a main light-condensing pattern formed on the base plate; and
a sub light-condensing pattern formed on the main light-condensing pattern, wherein the main light-condensing pattern includes a main prism which has a lower surface making contact with the base plate, the lower surface having a length in a first direction and a width in a second direction substantially perpendicular to the first direction, the width being smaller than the length and parallel to a base of a cross sectional shape of the main prism, wherein the cross section is taken along the second direction, and the sub light-condensing pattern includes a plurality of sub prisms formed on a surface of the main prism, each of the plurality of sub prisms including two surfaces making contact with each other along a first line which is substantially perpendicular to the first direction.
2. The light-condensing member of claim 1 , wherein the cross section of the main prism taken along the second direction substantially perpendicular to the first direction has a substantially triangular shape.
3. The light-condensing member of claim 2 , wherein a vertical angle of the main prism ranges from about 60 degrees to about 150 degrees.
4. The light-condensing member of claim 3 , wherein the vertical angle of the main prism is about 90 degrees.
5. The light-condensing member of claim 1 , wherein the cross section of the main prism taken along the second direction substantially perpendicular to the first direction has one of a substantially semi-circular shape or a substantially semi-elliptic shape.
6. The light-condensing member of claim 1 , wherein a cross section of a sub prism taken along the first direction has a substantially triangular shape.
7. The light-condensing member of claim 6 , wherein a vertical angle of the sub prism ranges from about 60 degrees to about 150 degrees.
8. The light-condensing member of claim 1 , wherein a cross section of a sub prism taken along the first direction has one of a substantially semi-circular shape or a substantially semi-elliptic shape.
9. The light-condensing member of claim 1 , wherein:
a main prism includes a first sloping surface and a second sloping surface upwardly protruding from the base plate to constitute a triangular shape; and
the sub light-condensing pattern is formed on each of the first sloping and the second sloping surfaces.
10. The light-condensing member of claim 1 , further comprising a diffusing layer formed on a bottom surface of the base plate.
11. The light-condensing member of claim 10 , wherein the diffusing layer includes a plurality of diffusing beads having a predetermined particle size.
12. A display apparatus comprising:
a lamp emitting light;
a light guide plate guiding the light, toward an upper part of the display apparatus, wherein the lamp is disposed at a side portion of the light guide plate;
a light-condensing member disposed over the light guide plate to condense light exiting from the light guide plate; and
a display unit disposed over the light-condensing member to display an image using the condensed light;
wherein the light-condensing member includes:
a base plate;
a main light-condensing pattern formed on the base plate; and
a sub light-condensing pattern formed on the main light-condensing pattern, wherein:
the main light-condensing pattern includes a main prism which has a lower surface making contact with the base plate, the lower surface having a length in a first direction and a width in a second direction substantially perpendicular to the first direction, the width being smaller than the length and parallel to a base of a cross sectional shape of the main prism, wherein the cross section is taken along the second direction; and
the sub light-condensing pattern includes a plurality of sub prisms formed on a surface of the main prism, each of the plurality of sub prisms including two surfaces making contact with each other along a first line which is substantially perpendicular to the first direction.
13. A display apparatus comprising:
a lamp emitting light;
a light-condensing member to condense and emit the light provided from the lamp, wherein the lamp is disposed at a side portion of the light-condensing member; and
a display unit disposed over the light-condensing member to display an image using the condensed light;
wherein the light-condensing member includes:
a base plate;
a main light-condensing pattern formed on the base plate; and
a sub light-condensing pattern formed on the main light-condensing pattern, wherein:
the main light-condensing pattern includes a main prism which has a lower surface making contact with the base plate, the lower surface having a length in a first direction and a width in a second direction substantially perpendicular to the first direction, the width being smaller than the length and parallel to a base of a cross sectional shape of the main prism, wherein the cross section is taken along the second direction; and
the sub light-condensing pattern includes a plurality of sub prisms formed on a surface of the main prism, each of the plurality of sub prisms including two surfaces making contact with each other along a first line which is substantially perpendicular to the first direction.