Backlight unit and display device
A backlight unit comprises: a backlight substrate including a first substrate which extends in a first direction and a plurality of second substrates which extend from the first substrate in a second direction perpendicular to the first direction and are spaced apart from each other in the first direction; a plurality of light-emitting elements arranged at the front surface of each of the second substrates to be spaced apart from each other in the second direction; and a reinforcement substrate intersecting the plurality of second substrates and extending in the first direction. The backlight unit can not only reduce unit production cost but can also ensure rigidity.
1 . A backlight unit comprising:
a backlight substrate configured to include a first substrate extending in a first direction and a plurality of second substrates extending from the first substrate in a second direction perpendicular to the first direction while being spaced apart from each other in the first direction;
a plurality of light emitting diodes (LEDs) arranged on a front surface of the plurality of second substrates to be spaced apart from each other in the second direction;
a back adhesive tape disposed on a back surface of the backlight substrate and provided with at least one diffuser plate supporter (DPS) hole disposed between the plurality of second substrates; and
a reinforcement substrate configured to cross the plurality of second substrates and extending in the first direction,
wherein the reinforcement substrate is disposed on a back surface of the back adhesive tape.
2 . The backlight unit according to claim 1 , further comprising:
a first guide hole formed in the first substrate and a second guide hole formed in the reinforcement substrate,
wherein
the first guide hole and the second guide hole are formed at the same position in the first direction.
3 . The backlight unit according to claim 1 , further comprising:
a first screw hole formed in the first substrate and a second screw hole formed in the reinforcement substrate,
wherein
the first screw hole and the second screw hole are formed at the same position in the first direction.
4 . The backlight unit according to claim 1 , wherein:
the reinforcement substrate is spaced apart from the first substrate and disposed adjacent to an end of the second substrate.
5 . The backlight unit according to claim 1 , wherein:
the reinforcement substrate has the same length as the first substrate.
6 . The backlight unit according to claim 1 , further comprising:
a front adhesive tape located on a front surface of the backlight substrate and provided with a hole formed in a portion corresponding to each light emitting diode (LED); and
a reflector coupled to a front surface of the front adhesive tape and provided with an opening formed in a portion corresponding to each light emitting diode (LED),
wherein
the front adhesive tape and the back adhesive tape are bonded to each other not only on the plurality of second substrates but also between the plurality of second substrates.
7 . The backlight unit according to claim 1 , wherein:
a distance between the plurality of second substrates in the first direction is greater than a width of each of the second substrates in the first direction,
wherein
each of the second substrates includes a node protruding toward both sides of the second substrate in the second direction.
8 . A display device comprising:
a cover bottom;
a backlight unit disposed at a front surface of the cover bottom; and
a liquid crystal panel disposed at a front surface of the backlight unit,
wherein the backlight unit includes:
a backlight substrate configured to include a first substrate extending in a first direction and a plurality of second substrates extending from the first substrate in a second direction perpendicular to the first direction while being spaced apart from each other in the first direction;
a plurality of light emitting diodes (LEDs) arranged on a front surface of the plurality of second substrates to be spaced apart from each other in the second direction; and
a reinforcement substrate configured to cross the plurality of second substrates and extending in the first direction,
wherein the first substrate includes a first guide hole,
wherein the reinforcement substrate includes a second guide hole, and
wherein the cover bottom includes a plurality of guide protrusions inserted into the first guide hole or the second guide hole.
9 . The display device according to claim 8 , further comprising:
a first screw hole formed in the first substrate and a second screw hole formed in the reinforcement substrate,
wherein
the first screw hole and the second screw hole are formed at the same position in the first direction.
10 . The display device according to claim 8 , wherein:
the cover bottom has a groove corresponding to the reinforcement substrate so that the groove is formed on a front surface of the cover bottom.
11 . The display device according to claim 8 , wherein the backlight unit includes:
a front adhesive tape located on a front surface of the backlight substrate and provided with a hole formed in a portion corresponding to each light emitting diode (LED);
a reflector coupled to a front surface of the front adhesive tape and provided with an opening formed in a portion corresponding to each light emitting diode (LED); and
a diffuser plate located on a front surface of the reflector.
12 . The display device according to claim 11 , further comprising:
a diffuser plate supporter (DPS) configured to support a back surface of the diffuser plate while forming an optical gap between the light emitting element (LED) and the diffuser plate,
wherein
the DPS is disposed between the plurality of second substrates.
13 . The display device according to claim 12 , wherein the DPS includes:
a base coupled to a front surface of the cover bottom;
a support portion configured to contact a back surface of the diffuser plate; and
an elastic portion disposed between the base and the support portion and configured to maintain the optical gap.
14 . The display device according to claim 13 , further comprising:
a back adhesive tape disposed on a back surface of the backlight substrate and provided with a DPS hole corresponding to the base of the DPS.
15 . The display device according to claim 14 , wherein:
the reinforcement substrate is disposed on a back surface of the back adhesive tape.
16 . The display device according to claim 11 , further comprising:
a back adhesive tape disposed on a back surface of the backlight substrate,
wherein the front adhesive tape and the back adhesive tape are bonded to each other between the plurality of second substrates.
17 . The display device according to claim 8 , wherein:
the backlight unit includes an LED driver connected to the first substrate.
18 . The display device according to claim 8 , wherein:
a distance between the plurality of second substrates in the first direction is greater than a width of each of the second substrates in the first direction,
wherein
each of the second substrates includes a node protruding toward both sides of the second substrate in the second direction.
19 . A backlight unit comprising:
a backlight substrate configured to include a first substrate extending in a first direction and a plurality of second substrates extending from the first substrate in a second direction perpendicular to the first direction while being spaced apart from each other in the first direction;
a plurality of light emitting diodes (LEDs) arranged on a front surface of each of the second substrates;
a front adhesive tape located on a front surface of the backlight substrate; and
a back adhesive tape disposed on a back surface of the backlight substrate,
wherein the front adhesive tape and the back adhesive tape are bonded to each other between the plurality of second substrates.