1. A gray level weighting centroid method for holographic data storage, comprising steps of:
establishing a processor and a 2-D sensor for receiving a first gray level image;
receiving said first gray level image having a plurality of first blocks each having a first gray level value;
performing a convolution calculation with said processor on a weight matrix and said first gray level values, so as to obtain a second gray level image having a plurality of second blocks each having a second gray level value;
choosing a threshold value and dividing said second gray level values into a first bright gray level value and a first dark gray level value by said threshold value, whereby said second gray level image is converted into a first thresholding image;
finding positions of first boundaries between said first bright gray level value and said first dark gray level value on said first thresholding image and defining positions of first borders of said second blocks corresponding to said first bright gray level value;
making said positions of said first borders correspond to said first gray level image, so as to find said first blocks surrounded by said position of said first borders and used respectively as a first centroid block; and
performing a calculation with said processor on said first gray level values and coordinates of said first blocks of each said first centroid block, so as to obtain respectively a first centroid point.
2. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
said first gray level image is a square array of H\xd7W, each said first gray level value is respectively G11I, G12I, . . . , and GHWI, and said weight matrix is a matrix of m\xd7n; said weight matrix is
a
11
a
12
\u22ef
a
1
\u2062
\u2062
n
a
21
\u22f1
a
2
\u2062
\u2062
n
\u22ee
\u22f1
\u22ee
a
m
\u2062
\u2062
1
a
m
\u2062
\u2062
2
\u22ef
a
mn
,
wherein values of said weight matrix are arbitrary integrals, and H, W, m, and n are all natural numbers.
3. The gray level weighting centroid method for holographic data storage according to claim 2, wherein
each said second gray level value is respectively obtained from following formulas:
\u2062
M
11
I
=
a
11
\xd7
G
11
I
+
a
12
\xd7
G
12
I
+
\u2026
+
a
mn
\xd7
G
mn
I
;
\u2062
M
12
I
=
a
11
\xd7
G
12
I
+
a
12
\xd7
G
13
I
+
\u2026
+
a
mn
\xd7
G
m
\u2061
(
n
+
1
)
I
;
\u2062
\u22ee
\u2062
M
21
I
=
a
11
\xd7
G
21
I
+
a
12
\xd7
G
22
I
+
\u2026
+
a
mn
\xd7
G
(
m
+
1
)
\u2062
n
I
;
\u2062
\u22ee
M
(
H
–
m
+
1
)
\u2062
(
W
–
n
)
I
=
a
11
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
)
I
+
a
12
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
I
+
\u2026
+
a
mn
\xd7
G
H
\u2061
(
W
–
1
)
I
;
\u2062
and
M
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
I
=
a
11
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
I
+
a
12
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
2
)
I
+
\u2026
+
a
mn
\xd7
G
HW
I
,
wherein each said second gray level value is respectively M11I, M12I, . . . , and M(H\u2212m+1)(W\u2212n+1)I.
4. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
in said step of performing said convolution calculation of said weight matrix and said first gray level values, said weight matrix moves from said first block of a first column of a first row of said first gray level image to said first block of a last column of said first row in order, wherein said weight matrix is calculated with said first gray level values corresponding to said first blocks surrounded by said weight matrix in each position that said weight matrix moves; after said weight matrix is calculated with each column of said first row, said weight matrix moves to a next row and repeats above-mentioned movement and calculation until said weight matrix moves to said first block of said last column of a last row of said first gray level image and finishes above-mentioned calculation.
5. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
said first centroid point is obtained from following formulas:
G
I
\u2062
c
\u2061
(
x
)
=
(
x
11
I
\xd7
G
11
I
+
x
12
I
\xd7
G
12
I
+
\u2026
+
x
pq
I
\u2062
G
pq
I
)
(
G
11
I
+
G
12
I
+
\u2026
+
G
pq
I
)
;
and
G
I
\u2062
c
\u2061
(
y
)
=
(
y
11
I
\xd7
G
11
I
+
y
12
I
\xd7
G
12
I
+
\u2026
+
y
pq
I
\u2062
G
pq
I
)
(
G
11
I
+
G
12
I
+
\u2026
+
G
pq
I
)
,
wherein GIc(x) is a horizontal coordinate of said first centroid point, GIc(y) is a vertical coordinate of said first centroid point, each said first gray level value of said first centroid block is respectively G11I, G12I, . . . , GpqI, a horizontal coordinate of each said first block of said first centroid block is respectively x11I, x12I, . . . , xpqI, and a vertical coordinate of each said first block of said first centroid block is respectively y11I, y12I, . . . , ypqI.
6. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
said second gray level value, which is larger than said threshold value, is converted into said first bright gray level value; said second gray level value, which is smaller than said threshold value, is converted into said first dark gray level value.
7. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
said first bright gray level value is 1 and said first dark gray level value is 0.
8. The gray level weighting centroid method for holographic data storage according to claim 1, wherein
said first blocks are black blocks or white blocks, whereby said first gray level image has a plurality of said black blocks and a plurality of said white blocks.
9. The gray level weighting centroid method for holographic data storage according to claim 8, wherein
said black blocks and said white blocks are arranged into a checker board.
10. The gray level weighting centroid method for holographic data storage according to claim 8, further comprising steps of:
interchanging positions of said black blocks with positions of said white blocks, so as to convert said first gray level image into a third gray level image having a plurality of third blocks each having a third gray level value;
performing a convolution calculation of said weight matrix and said third gray level values, so as to obtain a fourth gray level image having a plurality of fourth blocks each having a fourth gray level value;
dividing said fourth gray level values into a second bright gray level value and a second dark gray level value by said threshold value, whereby said fourth gray level image is converted into a second thresholding image;
finding positions of second boundaries between said second bright gray level value and said second dark gray level value on said second thresholding image and defining positions of second borders of said fourth blocks corresponding to said second bright gray level value;
making said positions of said second borders correspond to said third gray level image, so as to find said third blocks surrounded by said positions of said second borders and used respectively as a second centroid block;
performing a calculation of said third gray level values and coordinates of said third blocks of each said second centroid block, so as to obtain respectively a second centroid point; and
calculating said first centroid point and said second centroid point to obtain a total centroid point.
11. The gray level weighting centroid method for holographic data storage according to claim 10, wherein
said third gray level image is a square array of H\xd7W, each said third gray level value is respectively G11II, G12II, . . . , GHWII, and said weight matrix is a matrix of m\xd7n; said weight matrix is
a
11
a
12
\u22ef
a
1
\u2062
\u2062
n
a
21
\u22f1
a
2
\u2062
\u2062
n
\u22ee
\u22f1
\u22ee
a
m
\u2062
\u2062
1
a
m
\u2062
\u2062
2
\u22ef
a
mn
,
wherein values of said weight matrix are arbitrary integrals, and H, W, m, and n are all natural numbers.
12. The gray level weighting centroid method for holographic data storage according to claim 11, wherein
each said fourth gray level value is respectively obtained from following formulas:
\u2062
M
11
II
=
a
11
\xd7
G
11
II
+
a
12
\xd7
G
12
II
+
\u2026
+
a
mn
\xd7
G
mn
II
;
\u2062
M
12
II
=
a
11
\xd7
G
12
II
+
a
12
\xd7
G
13
II
+
\u2026
+
a
mn
\xd7
G
m
\u2061
(
n
+
1
)
II
;
\u2062
\u22ee
\u2062
M
21
II
=
a
11
\xd7
G
21
II
+
a
12
\xd7
G
22
II
+
\u2026
+
a
mn
\xd7
G
(
m
+
1
)
\u2062
n
II
;
\u2062
\u22ee
M
(
H
–
m
+
1
)
\u2062
(
W
–
n
)
II
=
a
11
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
)
II
+
a
12
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
II
+
\u2026
+
a
mn
\xd7
G
H
\u2061
(
W
–
1
)
II
;
\u2062
and
M
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
II
=
a
11
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
1
)
II
+
a
12
\xd7
G
(
H
–
m
+
1
)
\u2062
(
W
–
n
+
2
)
II
+
\u2026
+
a
mn
\xd7
G
HW
II
,
wherein each said fourth gray level value is respectively M11II, M12II, . . . , and M(H\u2212m+1)(W\u2212n+1)II.
13. The gray level weighting centroid method for holographic data storage according to claim 10, wherein
in said step of performing said convolution calculation of said weight matrix and said third gray level values, said weight matrix moves from said third block of a first column of a first row of said third gray level image to said third block of a last column of said first row in order, wherein said weight matrix is calculated with said third gray level values corresponding to said third blocks surrounded by said weight matrix in each position that said weight matrix moves; after said weight matrix is calculated with each column of said first row of said third gray level image, said weight matrix moves to a next row and repeats above-mentioned movement and calculation until said weight matrix moves to said third block of said last column of a last row of said third gray level image and finishes above-mentioned calculation.
14. The gray level weighting centroid method for holographic data storage according to claim 10, wherein
said second centroid point is obtained from following formulas:
G
II
\u2062
c
\u2061
(
x
)
=
(
x
11
II
\xd7
G
11
II
+
x
12
II
\xd7
G
12
II
+
\u2026
+
x
pq
II
\u2062
G
pq
OI
)
(
G
11
II
+
G
12
II
+
\u2026
+
G
pq
II
)
;
and
G
II
\u2062
c
\u2061
(
y
)
=
(
y
11
II
\xd7
G
11
II
+
y
12
II
\xd7
G
12
II
+
\u2026
+
y
pq
II
\u2062
G
12
II
)
(
G
11
II
+
G
12
II
+
\u2026
+
G
pq
II
)
,
wherein GIIc(x) is a horizontal coordinate of said second centroid point, GIIc(y) is a vertical coordinate of said second centroid point, each said third gray level value of said second centroid block is respectively G11II, G12II, . . . , GpqII, a horizontal coordinate of each said third block of said second centroid block is respectively x11II, x12II, . . . , xpqII, and a vertical coordinate of each said third block of said second centroid block is respectively y11II, y12II, . . . , ypqII.
15. The gray level weighting centroid method for holographic data storage according to claim 10, wherein
said fourth gray level value, which is larger than said threshold value, is converted into said second bright gray level value; said fourth gray level value, which is smaller than said threshold value, is converted into said second dark gray level value.
16. The gray level weighting centroid method for holographic data storage according to claim 10, wherein
said second bright gray level value is 1 and said second dark gray level value is 0.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A plasma display panel comprising:
a front glass substrate and a rear glass substrate coupled to each other by a sealing material coated at edges of said front and rear glass substrates;
first and second electrodes on opposing inner surfaces of said front and rear glass substrates so as to cross each other;
a dielectric layer on each of the opposing inner surfaces of said front and rear glass substrates so as to cover said first and second electrodes;
partitions formed on an upper surface of said dielectric layer of said rear glass substrate;
red, green and blue fluorescent substances coated between adjacent ones of said partitions; and
a non-light emitting zone filling portion filling a non-light emitting zone defined between an outermost one of said partitions and the sealing material, said non-light emitting zone portion comprising a material used for one of said partitions.
2. The plasma display panel as claimed in claim 1, wherein said outermost partition and said non-light emitting zone filling portion are substantially formed integrally.
3. The plasma display panel as claimed in claim 1, wherein said non-light emitting zone filling portion completely fills a space between the sealing material and said outermost partition.
4. The plasma display panel as claimed in claim 1, wherein said non-light emitting zone filling portion covers end portions of said first electrodes formed on the front glass substrate.
5. The plasma display panel as claimed in claim 1, wherein a gas exhaust hole is formed at an upper surface of said non-light emitting zone filling portion parallel to a lengthwise direction of said outermost partition.
6. The plasma display panel as claimed in claim 5, wherein a depth of the gas exhaust hole formed at the upper surface is within a range of 10 m through 160 m.
7. A plasma display panel comprising:
a front glass substrate and a rear glass substrate coupled to each other by a sealing material coated at edges of said substrates;
first and second electrodes formed on opposing inner surfaces of said front and rear glass substrates so as to cross each other;
a dielectric layer formed on each of the opposing inner surfaces of said front and rear glass substrates to cover said first and second electrodes;
partitions formed on an upper surface of said dielectric layer of said rear glass substrate;
red, green and blue fluorescent substances coated between adjacent ones of said partitions; and
a non-light emitting zone filling portion filling a non-light emitting zone defined between an outermost one of said partitions and the sealing material, said non-light emitting zone filling portion being disposed close to said outermost partition and comprising a material used for one of said partitions,
wherein
an empty space is defined between the sealing material and said non-light emitting zone filling portion, and
said non-light emitting zone filling portion covers end portions of said first electrodes.
8. The plasma display panel as claimed in claim 7, wherein a width of said non-light emitting zone filling portion is equal to a length of the end portions of said first electrodes which extend past said outermost partition.
9. The plasma display panel as claimed in claim 7, wherein a width of said non-light emitting zone filling portion is greater than a length of the end portions of said first electrodes which extend past said outermost partition.
10. The plasma display panel as claimed in claim 9, wherein a sum of the width of said non-light emitting zone filling portion and a width of said outermost partition is 1.0 mm, and a length of the end portion of each of said first electrodes covered by said non-light emitting zone filling portion and said outermost partition is 0.3 mm.
11. The plasma display panel as claimed in claim 7, wherein said first electrodes extend past said non-light emitting zone filling portion where a width of the empty space is less than 50 m.
12. The plasma display panel as claimed in claim 7, wherein a gas exhaust hole is formed on an upper surface of said non-light emitting zone filling portion parallel to a lengthwise direction of said outermost partition.
13. The plasma display panel as claimed in claim 12, wherein a depth of the gas exhaust hole from the upper surface is between 10 m and 160 m.
14. A method of manufacturing partitions for use in a plasma display panel comprising:
coating a partition material on an upper surface of a dielectric layer disposed on a glass substrate having electrodes in a predetermined pattern;
forming a cured pattern of a dry film resist to shield partition material portions designated to form partitions and portions corresponding to a non-light emitting zone between an outermost one of the partitions and a sealing material, said forming the cured pattern comprising
coating the dry film resist on an upper surface of the coated partition material,
exposing the dry film resist, and
developing the exposed dry film resist; and
partially removing the partition material by ejecting abrasion particles at a high speed using the cured pattern as a mask.
15. A plasma display panel, comprising:
a front glass substrate having first electrodes over which a first dielectric layer is formed;
a rear glass substrate disposed opposite said front glass substrate, said rear glass substrate having second electrodes over which a second dielectric layer is formed, the second electrodes not being parallel with the first electrodes;
a seal connecting corresponding edges of said front and rear glass substrates;
partitions formed on an upper surface of the second dielectric layer between the edges of said rear glass substrate;
a fluorescent substance coated between said partitions; and
a non-light emitting zone filling portion disposed between an outermost one of said partitions and said seal so as to prevent a discharge of the first electrodes in a space between said outermost partition and said seal.
16. The plasma display panel of claim 15, wherein said outermost partition and said non-light emitting zone filling portion comprise the same material.
17. The plasma display panel of claim 15, wherein said non-light emitting zone filling portion is connected to and has a same height as said outermost partition.
18. The plasma display panel of claim 17, wherein said non-light emitting zone filling portion fills the space between said outermost partition and said seal.
19. The plasma display panel of claim 15, wherein
each of said first electrodes comprises
a terminal end extending to said seal, and
a non-terminal end that does not extend to said seal, said non-light emitting zone filling portion and said outermost partition covering the non-terminal end.
20. The plasma display panel of claim 19, wherein the non-terminal end extends past said non-light emitting zone filling portion when a width of an empty space between said seal and said non-light emitting zone filling portion is less than 50 m.
21. The plasma display panel of claim 19, wherein the non-terminal end extends past said outermost partition and into but not through said non-light emitting zone filling portion.
22. The plasma display panel of claim 19, wherein the non-terminal end extends past said outermost partition, through said non-light emitting zone filling portion, but does not extend into a space defined between said non-light emitting zone filling portion and said seal.
23. The plasma display panel of claim 15, wherein said non-light emitting zone filling portion and the first dielectric layer define a gas removal channel through which gas is removed from the plasma display panel.
24. The plasma display panel of claim 15, wherein said non-light emitting zone filling portion and said seal define a gas removal channel through which gas is removed from the plasma display panel.
25. The plasma display panel of claim 24, wherein the gas removal channel is defined by approximately one half of a space between said outermost partition and said seal.
26. The plasma display panel of claim 25, wherein the space between said outermost partition and said seal has a width of 20 mm, and the gas discharge channel has a width of 10 mm.
27. The plasma display panel of claim 23, wherein another gas removal channel is defined between said non-light emitting zone filling portion and said seal.
28. The plasma display panel of claim 15, further comprising an inert gas disposed within the plasma display panel except between the space defined between said outermost partition and said seal.
29. A method of manufacturing a plasma display panel, comprising:
providing a front glass substrate having first electrodes over which a first dielectric layer is formed;
providing a rear glass substrate disposed opposite said front glass substrate, said rear glass substrate having second electrodes over which a second dielectric layer is formed, the second electrodes not being parallel with the first electrodes;
forming partitions and a non-light emitting zone filling portion, the partitions and non-light emitting zone filling portions being formed on the second dielectric layer;
coating a fluorescent substance between the formed partitions;
forming a seal connecting corresponding edges of the front and rear glass substrates, where the non-light emitting zone filling portion is disposed between an outmost one of the partitions and the seal so as to prevent a discharge of the first electrodes in a space between the outermost partition and the seal.
30. The method of claim 29, wherein said forming the partitions and the non-light emitting zone filling portion comprises:
coating a partition material on the second dielectric layer;
coating a dry film resist on an upper surface of the coated partition material so as to form a mask over the portions of the partition material corresponding to the partitions and the non-light emitting zone filling portion;
removing the partition material not covered by the mask by ejecting abrasion particles.
31. The method of claim 29, wherein said forming the partitions and the non-light emitting zone filling portion comprises:
printing the partitions using a partition material on the second dielectric layer; and
printing the non-light emitting zone filling portion using the partition material on the second dielectric layer.
32. The method of claim 31, wherein:
the printing the partitions comprises printing the partitions using a first screen, and
the printing the non-light emitting zone filling portion comprises printing the non-light emitting zone filling portion using a second screen.
33. The method of claim 29, further comprising injecting an inert gas into the plasma display panel, wherein the inert gas is not in the space between the outermost partition and the seal.
34. The method of claim 29, further comprising
forming a gas removal channel adjacent to the non-light emitting zone filling portion and between the outermost partition and the seal; and
exhausting a gas from the plasma display panel through the gas removal channel.
35. The method of claim 34, wherein said forming the gas removal channel comprises forming the gas removal channel between the non-light emitting zone filling portion and the first dielectric layer.
36. The method of claim 34, wherein said forming the gas removal channel comprises forming the gas removal channel between the non-light emitting zone filling portion and the seal.
37. A plasma display panel, comprising:
a front glass substrate having first electrodes over which a first dielectric layer is formed;
a rear glass substrate disposed opposite said front glass substrate, said rear glass substrate having second electrodes over which a second dielectric layer is formed, the second electrodes not being parallel with the first electrodes;
a seal connecting corresponding edges of said front and rear glass substrates;
partitions formed on an upper surface of the second dielectric layer between the edges of said rear glass substrate, an outermost one of the partitions extending to said seal so as to prevent a discharge of the first electrodes in a space between said outermost partition and said seal; and
a fluorescent substance coated between said partitions.