Three dimensional image display device

A 3D image display device, comprising:

• a view point division part that divides a plurality of pixels into a plurality of corresponding view points, wherein the view point division part includes:
• a plurality of view point division units having a lenticular lens shape tilted according to an inclination angle;
• and
• an inclination angle changing unit configured to change the inclination angles of the plurality of the view point division units to correspond to a portrait mode or a landscape mode, wherein
• the inclination angle in portrait mode is defined according to a value obtained by multiplying a first coefficient by a first ratio between a horizontal pitch of a pixel and a vertical pitch of the pixel,
• the inclination angle in landscape mode is defined according to a value obtained by multiplying a second coefficient by a reciprocal of the first ratio,
• a second ratio between a horizontal lens pitch of the lenticular lens and a vertical lens pitch of the lenticular lens is the first ratio multiplied by a ratio between a function of two variables used to determine the first coefficient and a function of two variables used to determine the second coefficient, and
• an optimal viewing distance is the same in portrait mode and landscape mode.

A 3D image display device, comprising:

• a view point division part that divides a plurality of pixels into a plurality of corresponding view points, wherein the view point division part includes:
• a plurality of view point division units having a lenticular lens shape tilted according to an inclination angle;
• and
• an inclination angle changing unit configured to change the inclination angles of the plurality of the view point division units to correspond to a portrait mode or a landscape mode, wherein
• at least one pixel in one of landscape mode or portrait mode is used as a free pixel,
• the inclination angle in portrait mode is defined according to a value obtained by multiplying a first coefficient by a first ratio between a horizontal pitch of a pixel and a vertical pitch of the pixel,
• the inclination angle in landscape mode is defined according to a value obtained by multiplying a second coefficient by a reciprocal of the first ratio,
• a second ratio between a horizontal lens pitch of the lenticular lens and a vertical lens pitch of the lenticular lens is the first ratio multiplied by a ratio between a function of two variables used to determine the first coefficient and a function of two variables used to determine the second coefficient and a number of free pixels, and
• an optimal viewing distance is the same in portrait mode and landscape mode.