Browse Prior Art Database

3D stereoscopic LCD with increased vertical viewing angle

IP.com Disclosure Number: IPCOM000189524D
Publication Date: 2009-Nov-12
Document File: 8 page(s) / 62K

Publishing Venue

The IP.com Prior Art Database

Abstract

ID672269

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Page 1 of 8

Title: 3D stereoscopic LCD with increased vertical viewing angle

Abstract:
At the moment 3D stereoscopic LCD panels are made by laminating an additional micro polarization layer on top of a regular LCD panel. Additional black stripes (black matrix) are implemented on this layer to increase the vertical viewing angle. Unfortunately the black matrix lowers the light output of the panel both in 3D and also in normal 2D viewing mode.

The invention proposes to create the black matrix in the content instead of on the polarization layer. In this case there is onl

y

reduced li

Philips Consumer Electronics
BG Connected Displays , Innovation Laboratory

Philips Intellectual Property & Standards

Abstract

g

ht out

p

ut in 3D viewin

g

mode.

Also the polarization layer can be simpler (lower resolution and no black matrix) and therefore cheaper.

1

Page 2 of 8

Philips Consumer Electronics
BG Connected Displays , Innovation Laboratory

Philips Intellectual Property & Standards

3D stereoscopic LCD with increased vertical viewing angle

Most relevant figure

Display Display

L

L

B

R

R

Increased vertical viewing

l b ddi

Increased vertical viewing angle by

inserting black

B

ang

le

y a

L

L

dding

black matrix lines

B

R

R

B

L

L

B

R

R

B

L

B A

C K L

I G H T

L

B A

C K L

I G H T

G L A S S

Viewing direction

B

G L A S S

R

R

B

L

L

B

R

R

B

L

L

B

Left pixel

Right pixel

Black pixel

Black matrix

L

R

R

B

R

L

L

B

B

R

R

B

L

L

B

Left polarization

Right polarization

R

R

B

Pixels: line by line left / right

Pixels: line by line left / right. Black lines in between.

Micro polarizer with black matrix

Micro polarizer w

/o black matrix

Current solution Invention

2

Page 3 of 8

Philips Consumer Electronics
BG Connected Displays , Innovation Laboratory

Philips Intellectual Property & Standards

3D stereoscopic LCD with increased vertical viewing angle

Background of the invention

Background

At the moment 3D stereoscopic LCD panels are made by laminating an additional micro

polarization la

p

y

er on to

p

of a re

g

ular LCD

p

anel. This

foil makes that even and odd lines have different polarization. Problem of this technology is that the vertical viewing angle is very limited due to parallax. Therefore a black matrix is used to increase the vertical viewin

g

an

g

le. Problem is that this black matrix reduces the li

ght

g

output of the panel both in 3D but also in case of 2D content (black matrix is static). The amount of black matrix needed is determined by the vertical viewing angle requirement, the thickness of the glass of the

p

ixels.

Panels will have increased resolution, like quad full HD. Applying the current micro polarizer technology on quad full HD panels will be a problem because the height of the pixels will decrease. This will have a

large impact on the required amount of black matrix (

=

anel and the vertical size

(

hei

g

ht

)

of the

p

reduced light

output) a...