Backlight unit and display device including the same

A backlight unit, comprising:

• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• an intermediate conductive layer disposed on the lower conductive layer;
• and
• an upper conductive layer disposed on the intermediate conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer, the connection member contacting the intermediate conductive layer of the wiring layer and the light emitting element;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer,
• wherein the lower conductive layer comprises:
• a first lower conductive pattern and a second lower conductive pattern disposed in the light emitting area, spaced apart from each other,
• wherein the intermediate conductive layer comprises a first intermediate conductive pattern and a second intermediate conductive pattern disposed in the light emitting area, spaced apart from each other,
• wherein the upper conductive layer comprises a first upper conductive pattern and a second upper conductive pattern disposed in the light emitting area, spaced apart from each other,
• wherein the first lower conductive pattern, the first intermediate conductive pattern, and the first upper conductive pattern overlap each other,
• wherein the second lower conductive pattern, the second intermediate conductive pattern, and the second upper conductive pattern overlap each other,
• wherein the light emitting element comprises:
• a first electrode electrically connected to the first intermediate conductive pattern;
• and
• a second electrode electrically connected to the second intermediate conductive pattern, and
• wherein a distance between the first lower conductive pattern and the second lower conductive pattern is greater than a distance between the first upper conductive pattern and the second upper conductive pattern.

A backlight unit, comprising:

• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• an intermediate conductive layer disposed on the lower conductive layer;
• and
• an upper conductive layer disposed on the intermediate conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer, the connection member contacting the intermediate conductive layer of the wiring layer and the light emitting element;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer,
• wherein:
• the backlight unit further comprises a switching element disposed between the base substrate and the wiring layer;
• and
• the wiring layer comprises:
• a first conductive pattern disposed in the light emitting area, connected to a first electrode of the light emitting element and the switching element;
• a second conductive pattern disposed in the light emitting area, connected to a second electrode of the light emitting element, spaced apart from the first conductive pattern;
• a pad disposed in the non-light emitting area, the pad contacting the pad connection member;
• and
• a connection pattern connected to the pad and the switching element.

A display device, comprising:

• a display panel;
• and
• a backlight unit providing light to the display panel, the backlight unit comprising:
• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• an intermediate conductive layer disposed on the lower conductive layer;
• and
• an upper conductive layer disposed on the intermediate conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area and configured to emit blue light;
• a connection member electrically connecting the light emitting element and the wiring layer;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer;
• and
• a wavelength converter disposed between the light emitting element and the display panel,
• wherein:
• the connection member contacts the intermediate conductive layer of the wiring layer in the light emitting area;
• and
• the connection member contacts the light emitting element in the light emitting area.

A backlight unit, comprising:

• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• and
• an upper conductive layer disposed on the lower conductive layer, the upper conductive layer contacting the lower conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer,
• wherein:
• the connection member contacts the lower conductive layer of the wiring layer in the light emitting area;
• and
• the connection member contacts the light emitting element in the light emitting area.

A backlight unit, comprising:

• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• and
• an upper conductive layer disposed on the lower conductive layer, the upper conductive layer contacting the lower conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer, the connection member contacting the light emitting element and the lower conductive layer of the wiring layer;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer,
• wherein a thickness of a portion of the lower conductive layer disposed in the light emitting area is thinner than a thickness of a portion of the lower conductive layer disposed in the non-light emitting area.

A backlight unit, comprising:

• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• and
• an upper conductive layer disposed on the lower conductive layer, the upper conductive layer contacting the lower conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer, the connection member contacting the light emitting element and the lower conductive layer of the wiring layer;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer,
• wherein:
• a light emitting block comprising the plurality of light emitting elements is defined on the wiring layer;
• the lower conductive layer comprises a plurality of lower conductive patterns spaced apart from each other;
• and
• the plurality of light emitting elements comprised in the light emitting block are connected in series to each other through the lower conductive pattern.

A display device, comprising:

• a display panel;
• and
• a backlight unit configured to provide light to the display panel, the backlight unit comprising:
• a base substrate in which a light emitting area and a non-light emitting area are defined;
• a wiring layer comprising:
• a lower conductive layer disposed on the base substrate;
• and
• an upper conductive layer disposed on the lower conductive layer, the upper conductive layer contacting the lower conductive layer;
• a light emitting element disposed on the wiring layer in the light emitting area;
• a connection member electrically connecting the light emitting element and the wiring layer, the connection member contacting the light emitting element and the lower conductive layer of the wiring layer and;
• a backlight flexible substrate electrically connected to the wiring layer in the non-light emitting area;
• and
• a pad connection member electrically connecting the wiring layer and the backlight flexible substrate in the non-light emitting area, the pad connection member contacting the upper conductive layer of the wiring layer;
• and
• a wavelength converter disposed between the light emitting element and the display panel,
• wherein a thickness of a portion of the lower conductive layer disposed in the light emitting area is thinner than a thickness of a portion of the lower conductive layer disposed in the non-light emitting area.