Auto-stereoscopic display device with a striped backlight and two lenticular lens arrays

Patent metadata

Field	Value
Publication number	US-2016373733-A1
Application number	US-201414902348-A
Country	US
Kind code	A1
Filing date	May 28, 2014
Priority date	Jul 2, 2013
Publication date	Dec 22, 2016
Grant date	—

Abstract

Autostereoscopic display device comprising a backlight ( 66 ), a display panel ( 62 ) comprising rows and columns of pixels and a lenticular arrangement ( 60, 64 ), wherein the backlight ( 66 ) provides a striped output comprising stripes in the column direction or offset by an acute angle to the column direction the lenticular arrangement comprises a first lenticular lens array ( 60 ) on the side of the display panel ( 62 ) facing the display output for directing different display panel pixel outputs in different directions and a second lenticular lens array ( 64 ) on the opposite side of the display panel ( 62 ), facing the backlight ( 66 ), for providing collimation of the striped back-light output.

First claim

1 . An autostereoscopic display device comprising:
a backlight; a display panel comprising rows and columns of pixels; and a lenticular arrangement, characterised in that the backlight provides a striped output comprising stripes in the column direction or offset by an acute angle to the column direction, and in that the lenticular arrangement comprises a first lenticular lens array on the side of the display panel facing the display output for directing different display panel pixel outputs in different directions and a second lenticular lens array on the opposite side of the display panel, facing the backlight, for providing collimation of the striped backlight output.

2 . A device as claimed in claim 1 , wherein the first lenticular arrangement is negative.

3 . A device as claimed in claim 1 , wherein the second lenticular arrangement is positive.

4 . A device as claimed in claim 1 , wherein:

tan




α
1

=

tan




α
2

N

,

where α 1 is the angular spread of light from the lenses of the first lenticular array, and α 2 is the angle of the viewing cone of light to the lenses of the second lenticular array to give a collimated output, and N is a positive integer.

5 . A device as claimed in claim 4 , wherein:

C


w
1

p
1

=

N


w
2

p
2

.

wherein w 1 is the width of a sub-pixel of the display panel, p 1 is the display panel pixel pitch, and w 2 the width of a backlight stripe and p 2 is the backlight stripe pitch, and wherein C is 1.0 or less.

6 . A device as claimed in claim 5 , wherein C is in the range 0.5 to 1.0.

7 . A device as claimed in claim 4 , wherein N=1.

8 . A device as claimed in claim 4 , wherein N>1.

9 . A device as claimed in claim 8 , wherein N=2.

10 . A device as claimed in claim 8 , further comprising a controller, which is adapted to:
drive the display panel in a sequence of N subframes, each subframe being synchronised with illumination with a respective set of backlight stripes.

11 . A device as claimed in claim 1 , wherein the backlight stripes are slanted with respect to the display column direction.

12 . A device as claimed in claim 11 , wherein the first and second lenticular lens arrays have the lens axes slanted with respect to the display column direction, with the lens axes and the backlight stripes in parallel.

Assignees

• Koninklijke Philips Nv

Inventors

• Kroon Bart
• Van Der Horst Jan
• Van Putten Eibert Gerjan

Classifications

• H04N13/351

  for displaying simultaneously · CPC title

• H04N13/317

  using slanted parallax optics · CPC title

• G02B3/0062

  Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between · CPC title

• G02B30/27 Primary

  involving lenticular arrays · CPC title

• H04N13/398 Primary

  Synchronisation thereof; Control thereof · CPC title