Light-guiding plate, lighting device and display device

A liquid crystal display, comprising:

• a light-guiding plate;
• a side light source arranged on an incident surface of said light-guiding plate;
• and
• a prism sheet including a plurality of prism parts arranged on an emission surface of said light-guiding plate,
• wherein a back surface of the prism sheet is parallel with the emission surface,
• wherein each of the prism parts having first surfaces that are flat and inclined with respect to the back surface of the prism sheet and a second surface that is parallel with respect to the back surface of the prism sheet, and
• wherein a ratio of an area of the first surfaces to an area of the second surface for a first of the plurality of prism parts is different than the ratio of an area of the first surfaces to an area of the second surface for a second of the plurality of prism parts.

An electronic device comprising:

• a liquid crystal display comprising,
• a light-guiding plate,
• a side light source arranged on an incident surface of said light-guiding plate, and
• a prism sheet comprising:
• a plurality of prism parts arranged on an emission surface of said light-guiding plate, and
• a back surface of the prism sheet that is parallel with the emission surface, each of the prism parts further comprising:
• two first surfaces that are flat and inclined with respect to the emission surface of the prism sheet, and
• a second surface that is parallel with respect to the emission surface of the prism sheet, and
• a ratio of an area of the first surfaces to an area of the second surface for a first of the plurality of prism parts being different than a ratio of an area of the first surfaces to an area of the second surface for a second of the plurality of prism parts.