Image display device
Provided is an image display device including: an image forming layer for forming a plurality of images; and a lens layer which is integrally provided with the image forming layer and includes a plurality of lenses for guiding the plurality of images formed in the image forming layer in a plurality of corresponding directions.
1. An image display device comprising:
a display panel having an image forming layer disposed between a first substrate and a second light transmission substrate arranged opposite to each other, the display panel including a plurality of pixels for forming a plurality of images; and
a plurality of lenses formed in an outside surface of the second light transmission substrate, the plurality of lenses guiding the plurality of images formed in the display panel in a plurality of corresponding directions, the plurality of lenses composing a lens layer,
wherein the plurality of lenses includes:
a first layer composed of the second light transmission substrate having a first refractive index;
a second layer having a second refractive index lower than the first refractive index; and
a third layer having a third refractive index higher than the second refractive index,
wherein the second layer is provided at an outside surface of the first layer between the first layer and the third layer, and
wherein the third layer includes a plurality of convex surfaces at the side of the second layer.
2. The image display device according to claim 1 , wherein:
the lens layer further includes a fourth layer having a fourth refractive index lower than the first refractive index,
the first layer is provided between the second layer and the fourth layer, and
the first layer includes a plurality of convex surfaces at the side of the fourth layer.
3. The image display device according to claim 1 , wherein each of the plurality of lenses included in the lens layer has a plane portion in a most protruding region.
4. The image display device according to claim 1 , wherein each of the plurality of lenses included in the lens layer has a Fresnel cross-section.
5. The image display device according to claim 1 , wherein:
the image forming layer includes a plurality of pixels, and
the plurality of lenses included in the lens layer are provided for at least two pixels, which are continuous in one direction, among the plurality of pixels.
6. The image display device according to claim 1 , wherein the lens layer is provided nearer to an observer side than the image forming layer.
7. The image display device according to claim 1 , wherein the image forming layer includes a liquid crystal layer.