US 20140160258A1
(19) United States
(12) Patent Application Publication (10) Pub. No.: US 2014/0160258 A1
KOH et al.
(43) Pub. Date:
(54) 3 DIMENSIONAL IMAGE DISPLAY DEVICE
(71)
Applicant: SAMSUNG DISPLAY CO., LTD.,
(30)
Foreign Application Priority Data
Sep. 28, 2010
Yongm-Clty (KR)
(72) Inventors: JAI-HYUN KOH, Seoul (KR);
(KR) ...................... .. 10-2010-0093704
Publication Classi?cation
(51) Int Cl
BONG-HYUN YOU, Yongin-si (KR);
JAE-SUNG BAE, Suwon-si (KR)
Jun. 12, 2014
'
'
H04N13/04
(52) US. Cl.
(200601)
CPC ................................... .. H04N13/04 (2013.01)
(73)
Assigneei SAMSUNG DISPLAY C04 LTD-,
Yongin-City (KR)
_
ABSTRACT
ing a plurality of pixels and displaying each of a left-eye
image and a right-eye image. The display device inserts an
insertion image between the left-eye image and the right-eye
image such that the left-eye image is displayed forpait of four
Jan. 13, 2014
Related U s A
' '
(62)
(57)
A 3D image display device includes a display device includ
(21) Appl' NO" 14/153’214
(22) Filed:
USPC .......................................................... .. 348/54
lication Data
PP
frames and the insertion image is displayed for the remaining
frames and the right-eye image is displayed for part of four
Division of application No. 13/088,695, ?led on Apr.
18,2011.
(480Hz)
other frames and the insertion image is displayed for the
remaining other frames.
Patent Application Publication
Jun. 12, 2014 Sheet 1 0f 17
FIG.1
Left
i2.1 ms
(480H2)
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 2 0f 17
US 2014/0160258 A1
FIG.2
Frame
N
N+1
N+2
N+3
N+4
N+5
N+6
N+7
4?e?BBBRightBBB
Panel
--a>
Left
/
9
Left
B
B
B
Right
.
/ Right
B
B
N+8
Patent Application Publication
Jun. 12, 2014 Sheet 3 0f 17
FIG.3
2.1 ms
(480Hz)
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 4 0f 17
US 2014/0160258 A1
FIG.4
Frame
N
N+1
??e? Left
Panel -~>
N+2
N+3
N+4
N+5
N+6
N+7
8
B
Right Right B
B
8
B
B
/
\\
‘1
Left Left
9 K Left
/
Right Right
Right
N+8
Patent Application Publication
Jun. 12, 2014 Sheet 5 0f 17
FIG.5
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 6 0f 17
US 2014/0160258 A1
FIG.6
Frame
N
N+1
N+2
,1?eft Left Left
Panel
N+3
N+4
N+5
N+6
B Flight Right Right
N+7
B
-—>
Left Left Left
9 / Left
B
/r
Right Right Right
Right
N+8
Patent Application Publication
Jun. 12, 2014 Sheet 7 0f 17
US 2014/0160258 A1
FIG.7
luminance “
100%
Lbi
50%
Li
L;
n
n+1
B
B
n+2
n+3
/Lbz
B
n+2
n+3
frame
FIG. 8
luminance ‘1
100%
50%
"
Lim
n
Lim
n+1
frame
Patent Application Publication
Jun. 12, 2014 Sheet 8 0f 17
US 2014/0160258 A1
FIG.9
luminance “
100%
——
LEM?
50%
Ll
Li
n
n+1
B
B
1
l
n+2
§
n+3
;
frame
FIG.10
luminance “
100%
50%
-—
Lb“
Li
Li
n
n+1
B
n+2
B
1
I
g
n+3
>
frame
Patent Application Publication
Jun. 12, 2014 Sheet 9 0f 17
US 2014/0160258 A1
FIG. 1 1
luminance “
100%
50%
__ Lim
Lim ///
Threshold
'
n
n+1
n+2
n+3
>
frame
FIG. 1 2
luminance “
100%
50%
“
Lim
Lim
Threshoid
m”
n
n+1
n+2
I
n+3
fragwe
Patent Application Publication
Jun. 12, 2014 Sheet 10 0f 17
US 2014/0160258 A1
FIG. 1 3A
luminance A
100%
th
50%
Li
L;
B
B
n
n+1
n+2
n+3
frame
FIG. 1 3B
luminance ‘1
100%
~—
thi
/,,, /
50%
Lb”
Li
Li
B
B
n
n+1
n+2
n+3
franie
Patent Application Publication
Jun. 12, 2014 Sheet 11 0f 17
US 2014/0160258 A1
FIG.13C
luminance A
100%
~—
th1'
Lg
Li
Li
50%
B
B
a
1
n
n+1
n+2
|
|
n+3
_
'
frame
Patent Application Publication
Jun. 12, 2014 Sheet 12 0f 17
mi 0% 0%
.GE3
NP,
cow
NF,
mLEot>mcoU
:,,
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 13 0f 17
US 2014/0160258 A1
FIG. 15
100
/
12
_____\__>
Gamma converter L>
12 I
F IG. 16
LUTR
LUTGl
1 12
\ 12
LUTB
\ '2
>
>
Patent Application Publication
Jun. 12, 2014 Sheet 14 0f 17
US 2014/0160258 A1
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Patent Application Publication
Jun. 12, 2014 Sheet 15 0f 17
FIG.18
210
Luminance
improvement
rate provider
260
/
Luminance
improvement
data generator
FIG.19
MAX L
LN+1 <= MAX L
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 16 0f 17
FIG.20
300
/
12
8
—\_,_
12 1
12
_\_>
____+___>
Reverse gamma
converter
8 ,
8
__\_>
US 2014/0160258 A1
Patent Application Publication
Jun. 12, 2014 Sheet 17 0f 17
US 2014/0160258 A1
SGcraley
F1IGZ
1Pd-—>i0a51xt0ea%l
50%MBTR:
Luminace
140 120 100
(3
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Jun. 12, 2014
US 2014/0160258 A1
3 DIMENSIONAL IMAGE DISPLAY DEVICE
CROSS-REFERENCE TO RELATED
APPLICATION
[0001]
This application is a divisional application of co
pending U.S. application Ser. No. 13/088,695 ?led Apr. 18,
201 l, which claims priority to Korean Patent Application No.
10-2010-0093704 ?led in the Korean Intellectual Property
Of?ce on Sep. 28, 2010, the disclosure of which is incorpo
rated by reference herein.
image may be displayed for one frame. Both the left lens and
the right lens may be in an off state while the left-eye image
and the right-eye image are overlapped with each other in the
display device.
[0012] Data representing additional luminance may be
additionally included in (or applied to) at least one of the
left-eye image, the right-eye image, and the insertion image to
display an image.
[0002]
(a) Technical Field
[0013] In any one of four frames in which the left-eye
image and the insertion image are displayed and four frames
in which the right-eye image and the insertion image are
displayed, the data representing the additional luminance
may be included in (or applied to) only one image of the ?rst
[0003]
Embodiments of the present invention relate to a 3
to third frames among the four frames to be displayed.
BACKGROUND OF THE INVENTION
dimensional image display device.
[0004] (b) Discussion of Related Art
[0005] A 3 dimensional image may be visualized by stereo
vision through both eyes. A binocular disparity is generated
by a visual disparity between both eyes, i.e., the distance
between both eyes. For example, the left and right eyes view
different 2D images and when both images are transferred to
the brain through the retina, the brain fuses the images to
reproduce the original 3D image.
[0006] Autostereoscopy is a method of displaying stereo
scopic (3D) images without the use of special glasses on the
part of the viewer. An autostereoscopic 3D image display
device may include a lenticular lens layer disposed on a liquid
crystal display. However, with this display device, the images
transferred to the right and left eyes are not clearly discrimi
nated, which produces a 3D effect with a low quality.
[0007] A stereoscopic 3D image display device has an addi
tional cost since it requires additional glasses, but allows
many people to view 3D images with improved quality since
images transferred to the left and right eyes can be more
clearly discriminated.
SUMMARY OF THE INVENTION
[0008] At least one embodiment of the present invention
has been made in an effort to provide a 3 dimensional image
display device that improves 3D display quality and improves
display luminance by allowing images transferred to the right
and left eyes to be more clearly discriminated and recognized.
[0009] An exemplary embodiment of the present invention
provides a 3D image display device which includes a display
device having a plurality of pixels and displaying each of a
left-eye image and a right-eye image. The display device
inserts an insertion image between the left-eye image and the
right-eye image such that the left-eye image is displayed for
part of four frames and the insertion image is displayed for the
remaining frames, and the right-eye image is displayed for
part of four other frames and the insertion image is also
displayed for the remaining other frames.
[0010] The device may further include glasses including a
left lens and a right lens which are alternately turned on and
off. The left lens may be in an on state while the left-eye image
is displayed and the right lens may be in the on state while the
[0014] When the data representing the additional lumi
nance is not included in (or applied to) the image of the ?rst
frame, the data may be included in (or applied to) the image of
the second frame, and when the data is not included in (or
applied to) the image of the second frame, the data may be
included in (or applied to) the image of the third frame.
[0015] In any one of four frames in which the left-eye
image and the insertion image are displayed and four frames
in which the right-eye image and the insertion image are
displayed, the data representing the additional luminance
may be all included in (or applied to) both the images of the
?rst and second frames among the four frames to be dis
played.
[0016] The data representing the additional luminance
included in (or applied to) the image of the ?rst frame and the
data representing the additional luminance included in (or
applied to) the image of the second frame may have different
intensities from each other. The data representing the addi
tional luminance included in (or applied to) the image of the
?rst frame and the data representing the additional luminance
included in (or applied to) the image of the second frame may
have the same intensity as each other.
[0017] The device may further include a 3D image proces
sor adding the data representing the additional luminance to
image data for application to a frame. The 3D image proces
sor may include a gamma converter generating gamma-con
verted data from image data, a luminance improver improv
ing the luminance of the gamma-converted data, and a reverse
gamma converter reverse gamma converting the data having
the improved luminance. The gamma converter may generate
output data having a bit number higher than the data input
thereto. The output data may be generated by a lookup table.
The reverse gamma converter may generate output data hav
ing a bit number less than the data input thereto.
[0018] The 3D image processor may further include a lumi
nance improvement rate provider. The luminance improver
may further include a luminance improvement data generator
and a frame memory. The luminance improvement data gen
erator may generate data having an improved luminance
depending on a luminance improvement rate (e.g., a maxi
right-eye image is displayed.
mum boost up threshold rate) provided from the luminance
improvement rate provider. The frame memory may store the
[0011] The left-eye image or the right-eye image may be
displayed for one frame and the insertion image is displayed
for three frames or the left-eye image or the right-eye image
may be displayed for two frames and the insertion image is
displayed for two frames. The left-eye image or the right-eye
image may be displayed for three frames and the insertion
generate data corresponding to a total four frames through
Equation 2 if a result of Equation 1 as below is true, and
generate data corresponding to a total four frames through
Equation 3 if the result is false.
data generated by the luminance improvement data generator.
[0019] The luminance improvement data generator may
Jun. 12, 2014
US 2014/0160258 A1
L*(MBTR+1)<Max L1012
[Equation 1]
[0029]
FIG. 6 is a graph showing a signal waveform of the
3D image display device according to the exemplary embodi
ment of FIG. 5.
[0030]
FIG. 7, FIG. 8, FIG. 9, FIG. 10, FIG. 11, FIG. 12,
FIG. 13A, FIG. 13B and FIG. 13C are graphs showing a
LN+2<:O
[Equation 2]
[Equation 3]
[0020] wherein L represents the luminance data inputted
into the luminance improvement data generator 260, MBTR
represents the luminance improvement rate (max boost up
threshold rate), Max L(1012) represents a maximum display
able luminance, and LN, LN+1, and LN+2 represent lumi
method of improving luminance displayed by a 3D image
display device according to an exemplary embodiment of the
present invention.
[0031] FIG. 14, FIG. 15, FIG. 16, FIG. 17, FIG. 18, FIG. 19
and FIG. 20 are diagrams showing the 3D image processor of
a signal controller of a 3D image display device according to
an exemplary embodiment of the present invention.
[0032] FIG. 21 is a graph showing improved luminance of
a 3D image display device according to an exemplary
embodiment of the present invention.
nance data of an N frame, the luminance data of an N+l
DETAILED DESCRIPTION OF EXEMPLARY
EMBODIMENTS
frame, and the luminance data of an N+2 frame, respectively.
In Equation 2 and Equation 3, the luminance data of the N+3
[0033] The present invention will be described more fully
hereinafter with reference to the accompanying drawings, in
frame may be black data.
[0021] The 3D image processor may further include a bal
ance rate provider that provides a rate (a balance rate) for
determining which of two frames data representing an addi
tional luminance is to be more greatly added to when addi
tional luminances are to be added to both the ?rst and second
frames. The balance rate may be applied to the luminance
improver and considered when data corresponding to a total
which exemplary embodiments of the invention are shown.
four frames are generated in the luminance improver.
[0022] According to at least one exemplary embodiment of
the present invention, a 3D image display device is provided
that allows an image transferred to a right eye and an image
transferred to a left eye to be more clearly discriminated and
recognized. Further other embodiments may additionally
improve the display quality of a 3D image by improving the
luminance of a liquid crystal display.
[0023] According to an exemplary embodiment of the
invention, a 3D image display device includes a display
device having a plurality of pixels. The display device is
con?gured to display a left-eye image for between one to
three frames of four consecutive ?rst frames followed by an
[0034] In the drawings, the thickness of layers, ?lms, pan
els, regions, etc., may be exaggerated for clarity. Like refer
ence numerals designate like elements throughout the speci
?cation. It will be understood that when an element such as a
layer, ?lm, region, or substrate is referred to as being “on”
another element, it can be directly on the other element or
intervening elements may also be present.
[0035] FIGS. 1 to 6 describe exemplary embodiments of
the invention that may reduce crosstalk in which a left-eye
image and right-eye image are misperceived by a right eye
and left eye, respectively. The embodiments may involve
high-speed driving of left and right eye images along with
black images interposed between the driven images.
[0036] FIG. 1 is a schematic diagram showing an operation
state of a 3 dimensional image display device according to an
exemplary embodiment of the present invention and FIG. 2 is
a graph showing a signal waveform of the 3D image display
device according to the exemplary embodiment of FIG. 1.
[0037] The 3D image display device includes a display
device and glasses. As an example, the display device may be
a liquid crystal display, an organic light emitting diode dis
all black image for the remaining ?rst frames. The display
device is con?gured to display a right-eye image for between
play, etc. Hereinafter, the liquid crystal display will primarily
one to three frames of four consecutive second frames fol
be described as the display device merely for ease of discus
lowed by the same all black image for the remaining second
frames.
s10n.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a schematic diagram showing an operation
state of a 3 dimensional image display device according to an
exemplary embodiment of the present invention.
[0025] FIG. 2 is a graph showing a signal waveform of the
3D image display device according to the exemplary embodi
ment of FIG. 1.
[0026] FIG. 3 is a schematic diagram showing an operation
state of a 3 dimensional image display device according to an
exemplary embodiment of the present invention.
[0027] FIG. 4 is a graph showing a signal waveform of the
3D image display device according to the exemplary embodi
ment of FIG. 3.
[0028] FIG. 5 is a schematic diagram showing an operation
state of a 3 dimensional image display device according to an
exemplary embodiment of the present invention.
[0038] The liquid crystal display includes a liquid crystal
display panel and a backlight unit (not shown). The liquid
crystal display panel includes a plurality of pixels. The liquid
crystal display panel controls the intensity of transmitted light
by changing a liquid crystal alignment direction using an
electric ?eld generated between two electrodes to display an
image.
[0039]
The liquid crystal display panel may include an
upper substrate, a lower substrate, and a liquid crystal layer
injected or interposed between the upper substrate and the
lower substrate.
[0040] A gate line, a data line, a pixel electrode, and a thin
?lm transistor connected thereto may be formed on the lower
substrate. The thin ?lm transistor controls a voltage applied to
the pixel electrode on the basis of signals applied to the gate
line and the data line. For example, the thin ?lm transistor
controls the voltage applied to the pixel electrode by trans
mitting a voltage applied to the data line from a source elec
trode to a drain electrode of the thin ?lm transistor and apply