Luminous display element including an optical member for reflecting light in a direction opposite to an incident direction

A display comprising:

• a plurality of pixels illuminated by a luminous display element;
• said luminous display element comprising:
• an emission layer whose state changes between a first state which is an emission state and a second state which is a non-emission state, said emission layer comprising a plurality of thin film elements;
• and
• a retro-reflecting member disposed on a back side of the emission layer which reflects a light emitted from the emission layer,
• wherein, when the emission layer is in the second state, said retro-reflecting member is adapted to reflect an image of a black part of an observer's eye so as to realize a black state created by the observer viewing a reflected image of the black part of the observer's eye.

A display, comprising:

• a plurality of pixels illuminated by a luminous display element;
• said luminous display element comprising:
• an emission layer comprising a plurality of thin film elements;
• and
• a retro-reflective member disposed on a back side of said emission layer, said retro-reflective member reflecting incident light in a direction substantially opposite to, and along an axis substantially parallel to, an incident direction over a range of directions of incident light.

A display comprising:

• a plurality of pixels illuminated by a luminous display element;
• said luminous display element comprising:
• an emission layer whose state changes between a first state which is an emission state and a second state which is a non-emission state, said emission layer comprising a plurality of thin film elements;
• and
• a reflecting member disposed on a back side of the emission layer which reflects a light emitted from the emission layer, said reflecting member being arranged to reflect an image of a black part of an observer's eye thereby realizing a black state when the emission layer is in said second state without using a polarizer.

A display, comprising:

• a plurality of pixels illuminated by a luminous display element;
• said luminous display element comprising:
• an emission layer comprising a plurality of thin film elements;
• and
• a retro-reflective member disposed on back side of said emission layer, said retro-reflective member reflecting incident light in a direction substantially opposite to, and along an axis substantially parallel to, an incident direction over a range of directions of incident light, wherein a pitch of a unit structure of said retro-reflective member is less than 10 mm.