Auto-stereoscopic display device and driving method
AssigneeKoninklijke Philips N.V.
InventorChristiaan Varekamp
Life of this patent
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Abstract
The invention provides a directional back-light arrangement for an auto-stereoscopic display in which different parts of the backlight arrangement point in different directions. This means that different parts of the backlight arrangement will be suitable for directing images in different directions, while reducing the effect of optical aberrations resulting from large exit angles.
Claims11
A backlight arrangement for an auto-stereoscopic display device, comprising:
- a segmented backlight;
- and
- a lens arrangement comprising an array of lens units,
- wherein a respective sub-array (14) of backlight segments is associated with each lens unit (16) of the lens arrangement, such that the lens unit (16) directs light output from different backlight segments in different directions,
- wherein each backlight sub-array (14) provides illumination to a light tube (20) with the respective lens unit at the end of the light tube, and
- wherein the light tubes comprise at least two sets, with the light tubes of a first set all parallel to each other and facing a first direction and the light tubes of a second set all parallel to each other and facing a second direction.
A method of controlling an auto-stereoscopic display device which comprises a backlight arrangement comprising a segmented backlight and a lens arrangement comprising an array of lens units (16), wherein a respective sub-array (14) of backlight segments is associated with each lens unit (16) of the lens arrangement, such that the lens unit directs light output from different backlight segments in different directions, wherein the method comprises the steps of:
- aligning each backlight sub-array (14) with a light tube (20) having the respective lens unit (16) at the end of the light tube, and wherein the light tubes comprise at least two sets, with the light tubes of a first set all parallel to each other and facing a first direction and the light tubes of a second set all parallel to each other and facing a second direction;
- detecting the position of a viewer;
- based on the viewer position, determining which set of light tubes to use to display an image to each eye of the viewer;
- and
- for the selected light tubes, controlling the associated sub-array (14) of backlight segments to provide illumination in a direction through a light modulating display panel to each eye of the viewer.
Dependencies are inferred from the claim text.