US 7,404,642 B2Granted

Autostereoscopic display

AssigneeSamsung Electronics Co., Ltd.

InventorsSergey Shestak, Dae-sik Kim

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Abstract

An autostereoscopic display having an improved 2D/3D mode switchable structure, including a display device to display an image, and a parallax barrier unit to transmit all incident light in a 2D mode and to separate a left-eye image and a right-eye image by forming a barrier in a 3D mode. The parallax barrier unit includes a polarizer to transmit light having a predetermined polarizer polarization direction, a first plane array including first and second birefringent elements, which change a polarization direction of light transmitted through the polarizer into a first direction and a second direction opposite to the first direction, respectively, and a second plane array including third and fourth birefringent elements, which change a polarization direction of light transmitted through the first plane array into a third direction and a fourth direction, that is opposite from the third direction, respectively.

Claims31

Dependent claims

An autostereoscopic display, comprising:

a display device to display an image;
and
a parallax barrier unit to transmit all incident light in a 2D mode, and to separate the incident light into a left-eye image and a right-eye image by forming a barrier in a 3D mode, the parallax barrier unit comprising:
a polarizer disposed in an optical path of the image displayed by the display device to transmit light having a predetermined polarizer polarization direction,
a first plane array including first birefringent elements, which change a polarization direction of light transmitted through the polarizer into a first direction, and second birefringent elements, which change the polarization direction of light transmitted through the polarizer into a second direction opposite to the first direction, the first and second birefringent elements alternating with each other,
a second plane array facing the first plane array, and including third birefringent elements, which change a polarization direction of light transmitted through the first plane array into a third direction, and fourth birefringent elements, which change the polarization direction of light transmitted through the first plane array into a fourth direction opposite to the third direction, the third and fourth birefringent elements alternating with each other, and
an analyzer facing the second plane array to transmit only light having a predetermined analyzer polarization direction from among light transmitted through the second plane array,
wherein at least one of the first and second plane arrays is movable to control relative positions of the first and second birefringent elements and the third and fourth birefringent elements to selectively display a 2D image or a 3D image.

5 more elements

An autostereoscopic display, comprising:

a first plane array to receive first incident light of an image and having a plurality of first and second birefringent elements to change a polarization of the first incident light in first and second directions;
a second plane array disposed adjacent to the first plane array to receive second incident light from the first plane array and having a plurality of third and fourth birefringent elements to change a polarization of the second incident light in the first and second directions;
an analyzer to receive third incident light from the second plane array and to transmit the third incident light of a predetermined polarization;
and
a switch to shift a relative position of the first and second plane arrays such that a first portion of the first incident light of the image is blocked by the analyzer while a second portion of the first incident light of the image is transmitted by the analyzer when the autostereoscopic display operates in a 3D mode,
wherein the first, second, third, and fourth birefringent elements each comprise one of a positive linear phase shift element, a negative linear phase shift element, a positive rotational element, and a negative rotational element.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/259,084Filed 27 Oct 2005 · us provisional application
Priority: KR 10-2005-00280654 Apr 2005
Published: US 2006/0114415 A11 Jun 2006
Granted: 29 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G02B 30/25
Of the stereoscopic type: using polarisation techniques
G02B 30/27
Of the autostereoscopic type: involving lenticular arrays
G02B 30/30
Of the autostereoscopic type: involving parallax barriers
H04N 13/31
For viewing without the aid of special glasses, i.e. using autostereoscopic displays: using parallax barriers