Light-guiding plate, lighting device and display device

A prism sheet, comprising:

• a plurality of prisms at a major surface of the prism sheet that is in contact with a light-guiding plate, and light from The light-guiding plate entering the prisms;
• and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• distances between opposing inclined sides of the prisms decrease far increasing distances of the prisms from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

A light source device comprising:

• a light guiding plate;
• and
• a prism sheet, which is in contact with the light guiding plate, the prism sheet comprising:
• a plurality of prisms at a major surface of the prism sheet and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• heights of inclined sides of the prisms increase for increasing distances of the inclined sides from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

A light source device comprising:

• a light guiding plate;
• and
• a prism sheet, which is in contact with the light guiding plate, the prism sheet comprising:
• a plurality of prisms at a major surface of the prism and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat, the light emission surface for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• distances between opposing inclined sides of the prisms decrease for increasing distances of the prisms from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

A liquid crystal display comprising:

• a light guiding plate;
• and
• a prism sheet which is In contact with the light guiding plate, the prism sheet comprising:
• a plurality of prisms at a major surface of the prism sheet and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• heights of inclined sides of the prisms increase for increasing distances of the inclined sides from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

A liquid crystal display comprising:

• a light guiding plate;
• and
• a prism sheet, which is in contact with the light guiding plate, the prism sheet comprising:
• a plurality of prisms at a major surface of the prism sheet and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• distances between opposing inclined sides of the prisms decrease for increasing distances of the prisms from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

An information processing apparatus comprising:

• a light guiding plate;
• and
• a prism sheet, which is in contact with the light guiding plate, the prism sheet comprising:
• a plurality of prisms at a major surface of the prism sheet and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing through a respective center of a corresponding one of the prisms, and
• heights of inclined sides of the prisms increase for increasing distances of the inclined sides from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.

An information processing apparatus comprising:

• a light guiding plate;
• and
• a prism sheet, which is in contact with the light guiding plate;
• the prism sheet comprising:
• a plurality of prisms at a major surface of the sheet and light from the light-guiding plate entering the prisms, and
• a light emission surface at an opposite side of the major surface, the light emission surface being flat and for emitting the light,
• wherein a plurality of planes are parallel to one side of the prism sheet, each of the planes passing Through a respective center of a corresponding one of the prisms, and
• distances between opposing inclined sides of the prisms decrease for increasing distances of the prisms from the one side of the prism sheet up to a predetermined distance from the one side of the prism sheet.