Lighting device and display device using the lighting device

A lighting device comprising:

• a light source;
• a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface;
• and
• a reflection member having a first portion facing the back surface, and a second portion located on a side opposite to a side of the light conducting plate on which the light source is located,
• the light conducting plate comprising a plurality of concave portions which are formed on the back surface and orient light emitted from the light conducting plate via the back surface toward an emission surface of the lighting device,
• a parameter related to the plurality of concave portions being weighted so that an even luminance distribution can be obtained on the emission surface.

A lighting device comprising:

• a plurality of units located;
• the plurality of units respectively comprising:
• light sources;
• light conducting plates, each having an incident surface receiving light emitted from the light sources, a back surface, a light-emitting surface and an edge opposite to the incident surface;
• and
• a reflection member facing the back surfaces of the light conducting plate.

A lighting device comprising:

• a plurality of units located;
• the plurality of units respectively comprising:
• light sources;
• light conducting plates, each having an incident surface receiving light emitted from the light sources, a back surface, a light-emitting surface and an edge opposite to the incident surface;
• a reflection member facing the back surfaces of the light conducting plate;
• light diffusing means, formed on the back surface of each of the light conducting plates, for diffusing light traveling in each of the light conducting plates in the vicinity of the incident surface more greatly than in other portions of each of the light conducting plates;
• a first linear prism plate partially allowing the lights emitted from the light conducting plates to pass through the first linear prism plate and partially reflecting said lights toward a space between the light conducting plates and the first linear prism plate;
• and
• a second linear prism plate collecting the lights from the first linear prism plate in a normal-line direction on the emission surface,
• wherein:
• the light conducting plates are arranged so that a space is defined by edges of the light conducting plates;
• and
• the light-emitting surface of each of the light conducting plates comprises an inclined surface which goes down toward the second portion of the reflection member.

A display device comprising:

• a display panel;
• and
• a lighting device,
• said lighting device comprising:
• a light source;
• a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface;
• and
• a reflection member having a first portion facing the back surface, and a second portion located on a side opposite to a side of the light conducting plate on which the light source is located,
• said second portion being spaced apart from the light conducting plate so that light emitted from the light conducting plate is oriented toward an emission surface of the lighting device.

A display device comprising:

• a display panel;
• and
• a lighting device,
• said lighting device comprising:
• a light source;
• a light conducting plate having an incident surface receiving light emitted from the light source, a back surface and a light-emitting surface;
• and
• a reflection member having a first portion facing the back surface, and a second portion located on a side opposite to a side of the light conducting plate on which the light source is located,
• the light conducting plate comprising a plurality of concave portions which are formed on the back surface and orient light emitted from the light conducting plate via the back surface toward an emission surface of the lighting device,
• a parameter related to the plurality of concave portions being weighted so that an even luminance distribution can be obtained on the emission surface.

A display device comprising:

• a display panel;
• and
• a lighting device,
• said lighting device comprising a plurality of units located;
• the plurality of units respectively comprising:
• light sources;
• light conducting plates, each having an incident surface receiving light emitted from the light sources, a back surface, a light-emitting surface and an edge opposite to the incident surface;
• and
• a reflection member facing the back surfaces of the light conducting plate.

A display device comprising:

• a display panel;
• and
• a lighting device,
• said lighting device comprising a plurality of units located;
• the plurality of units respectively comprising:
• light sources;
• light conducting plates, each having an incident surface receiving light emitted from the light sources, a back surface, a light-emitting surface and an edge opposite to the incident surface;
• a reflection member facing the back surfaces of the light conducting plate;
• light diffusing means, formed on the back surface of each of the light conducting plates, for diffusing light traveling in each of the light conducting plates in the vicinity of the incident surface more greatly than in other portions of each of the light conducting plates;
• a first linear prism plate partially allowing the lights emitted from the light conducting plates to pass through the first linear prism plate and partially reflecting said lights toward a space between the light conducting plates and the first linear prism plate;
• and
• a second linear prism plate collecting the lights from the first linear prism plate in a normal-line direction on the emission surface,
• wherein:
• the light conducting plates are arranged so that a space is defined by edges of the light conducting plates;
• and
• the light-emitting surface of each of the light conducting plates comprises an inclined surface which goes down toward the second portion of the reflection member.