U.S. patent application number 16/351758 was filed with the patent office on 2019-07-11 for display device.
The applicant listed for this patent is InnoLux Corporation. Invention is credited to Chien-Hung CHEN, Mei-Chun SHIH, Tsung-Han TSAI.
Application Number | 20190212624 16/351758 |
Document ID | / |
Family ID | 58407141 |
Filed Date | 2019-07-11 |
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United States Patent
Application |
20190212624 |
Kind Code |
A1 |
TSAI; Tsung-Han ; et
al. |
July 11, 2019 |
DISPLAY DEVICE
Abstract
A display device is provided. The display device includes a
first substrate, a second substrate, a liquid-crystal layer, a
first electrode, and an opposite electrode. The liquid-crystal
layer is disposed between the first substrate and the second
substrate. The first electrode is disposed on the first substrate.
The opposite electrode is disposed on the side of the second
substrate that faces the first substrate. The first electrode
includes a first main portion and a plurality of first extending
portions. The first extending portions are connected to the first
main portion, at least one of the first extending portions includes
a first side, a second side, and a curved structure. The curved
structure connects the first side to the second side, and the
curved structure has a first curvature radius greater than
zero.
Inventors: |
TSAI; Tsung-Han; (Miao-Li
County, TW) ; CHEN; Chien-Hung; (Miao-Li County,
TW) ; SHIH; Mei-Chun; (Miao-Li County, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
InnoLux Corporation |
Miao-Li County |
|
TW |
|
|
Family ID: |
58407141 |
Appl. No.: |
16/351758 |
Filed: |
March 13, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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15272833 |
Sep 22, 2016 |
10274800 |
|
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16351758 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F 2001/134345
20130101; G02F 2201/121 20130101; G02F 1/134363 20130101; G02F
1/136286 20130101; G02F 1/133707 20130101; G02F 2001/134372
20130101; G02F 2201/56 20130101; G02F 1/134336 20130101; G02F
1/134309 20130101 |
International
Class: |
G02F 1/1362 20060101
G02F001/1362; G02F 1/1337 20060101 G02F001/1337; G02F 1/1343
20060101 G02F001/1343 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 30, 2015 |
CN |
201510638234.3 |
Claims
1. A display device, comprising: a first substrate; a second
substrate; a liquid-crystal layer, disposed between the first
substrate and the second substrate; a data line, disposed on the
first substrate; a first electrode, disposed on the first
substrate, wherein the first electrode comprises a first main
portion, a first peripheral portion and a plurality of first
extending portions connected to the first main portion and the
first peripheral portion; wherein at least a portion of the first
peripheral portion is parallel to the data line and comprises at
least one first curved side.
2. The display device as claimed in claim 1, wherein the first main
portion is cross-shaped.
3. The display device as claimed in claim 1, further comprising a
scan line disposed on the first substrate, wherein an extending
direction of the scan line differs from an extending direction of
the data line, and another portion of the first peripheral portion
is parallel to the scan line.
4. The display device as claimed in claim 1, further comprising a
second electrode, wherein the second electrode is separated from
the first electrode, and the second electrode comprises a second
main portion and a plurality of second extending portions.
5. The display device as claimed in claim 4, wherein the second
electrode comprises a second peripheral portion, at least a portion
of the second peripheral portion is parallel to the data line, and
the second peripheral portion comprises at least one second curved
side.
6. The display device as claimed in claim 5, further comprising a
scan line, disposed on the first substrate, wherein an extending
direction of the scan line differs from an extending direction of
the data line, and another portion of the second peripheral portion
is parallel to the scan line.
7. The display device as claimed in claim 4, wherein the second
main portion is cross-shaped.
8. The display device as claimed in claim 4, wherein a part of the
first extending portions and a part of the second extending
portions are staggered.
9. The display device as claimed in claim 4, further comprising a
scan line disposed on the first substrate and extending along a
first direction, wherein the first direction differs from an
extending direction of the data line, and a width of the first main
portion in the first direction is greater than a width of at least
one of the first extending portions in the first direction.
10. The display device as claimed in claim 9, wherein in the first
direction, a width of at least one of the first extending portion
adjacent to the first main portion is greater than a width of at
least one of the first extending portion away from the first main
portion.
11. A display panel, comprising: a first substrate; a second
substrate; a liquid-crystal layer, disposed between the first
substrate and the second substrate; a data line, disposed on the
first substrate; a first electrode, disposed on the first
substrate, wherein the first electrode comprises a first main
portion, a first peripheral portion and a plurality of first
extending portions connected to the first main portion and the
first peripheral portion; wherein at least a portion of the first
peripheral portion is parallel to the data line and comprises at
least one first curved side.
12. The display panel as claimed in claim 11, wherein the first
main portion is cross-shaped.
13. The display panel as claimed in claim 11, further comprising a
scan line, disposed on the first substrate, wherein an extending
direction of the scan line differs from an extending direction of
the data line, and another portion of the first peripheral portion
is parallel to the scan line.
14. The display panel as claimed in claim 11, further comprising a
second electrode, wherein the second electrode is separated from
the first electrode, and the second electrode comprises a second
main portion and a plurality of second extending portions.
15. The display panel as claimed in claim 14, wherein the second
electrode comprises a second peripheral portion, at least a portion
of the second peripheral portion is parallel to the data line, and
the second peripheral portion comprises at least one second curved
side.
16. The display panel as claimed in claim 15, further comprising a
scan line disposed on the first substrate, wherein an extending
direction of the scan line differs from an extending direction of
the data line, and another portion of the second peripheral portion
is parallel to the scan line.
17. The display panel as claimed in claim 14, wherein the second
main portion is cross-shaped.
18. The display panel as claimed in claim 14, wherein a part of the
first extending portions and a part of the second extending
portions are staggered.
19. The display panel as claimed in claim 14, further comprising a
scan line disposed on the first substrate and extending along a
first direction, wherein the first direction differs from an
extending direction of the data line, and a width of the first main
portion in the first direction is greater than a width of at least
one of the first extending portions in the first direction.
20. The display panel as claimed in claim 19, wherein in the first
direction, a width of at least one of the first extending portion
adjacent to the first main portion is greater than a width of at
least one of the first extending portion away from the first main
portion.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Continuation of pending U.S. patent
application Ser. No. 15/272,833, filed Sep. 22, 2016 and entitled
"display device", which claims priority of China Patent Application
No. 201510638234.3, filed on Sep. 30, 2015, the entirety of which
is incorporated by reference herein.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] The present disclosure relates to a display device, and in
particular to a display device with a disclination line.
Description of the Related Art
[0003] Conventional display device includes a first substrate, a
second substrate, a liquid-crystal layer, and an electrode. The
liquid-crystal layer is disposed between the first substrate and
the second substrate. The electrode is disposed on the first
substrate. Conventionally, the electrode includes a plurality of
branches, and corners are formed on the ends of the branches.
Finding a way to improve the light transmittance and the response
time is an important issue of the display technology.
BRIEF SUMMARY OF THE INVENTION
[0004] In one embodiment, a display device is provided. The display
device includes a first substrate, a second substrate, a
liquid-crystal layer, a first electrode, and an opposite electrode.
The liquid-crystal layer is disposed between the first substrate
and the second substrate. The first electrode is disposed on the
first substrate. The opposite electrode is disposed on the side of
the second substrate that faces the first substrate. The first
electrode comprises a first main portion and a plurality of first
extending portions. The first extending portions are connected to
the first main portion, and at least one of the first extending
portions comprises a first side, a second side, and a curved side.
The curved side connects the first side and the second side, and
the curved side has a first curvature radius greater than zero.
[0005] In another embodiment, a display device is provided. The
display device includes a first substrate, a second substrate, a
liquid-crystal layer, a first electrode, and an opposite electrode.
The liquid-crystal layer is disposed between the first substrate
and the second substrate. The first electrode is disposed on the
first substrate. The opposite electrode is disposed on the side of
the second substrate that faces the first substrate. The first
electrode comprises a first main portion and a plurality of first
extending portions. The first extending portions are connected to
the first main portion, and at least one of the first extending
portions comprises a first side, a second side, and a curved side.
The curved side connects the first side and the second side. The
first side connects the first main portion at a first end point.
The second side connects the first main portion at a second end
point. The curved side connects the first side at a third end
point. The curved side connects the second side at a fourth end
point. The area of the first extending portion is greater than the
quadrilateral area enclosed by the first, second, third, and fourth
end points.
[0006] In another embodiment, a display device is provided. The
display device includes a first substrate, a second substrate, a
liquid-crystal layer, a first sub-pixel area, and a second
sub-pixel area. The liquid-crystal layer is disposed between the
first substrate and the second substrate. A disclination line
structure is between the first sub-pixel area and the second
sub-pixel area, and the disclination line structure comprises a
disclination line main portion and a plurality of top indentations.
A virtual line segment is defined at a location where one of the
top indentations connect to the disclination line main portion. The
virtual line segment is parallel to the extending direction of the
disclination line main portion. The one of the top indentation
comprises a first disclination line side and a second disclination
line side. The first disclination line side is relatively adjacent
to the center of the disclination line main portion. The second
disclination line side is relatively away from the center of the
disclination line main portion. A first included angle between the
first disclination line side and the virtual line segment is
greater than a second included angle between the second
disclination line side and the virtual line segment, and the first
included angle and the second included angle are inside the top
indentation.
[0007] Utilizing the curved side mentioned above, the arrangement
of the liquid-crystal molecules is improved, and the light
transmittance and the response time response time are improved.
Additionally, utilizing the disclination line structure of the
embodiment, the retention time is decreased, and the visual angle
is made uniform.
[0008] A detailed description is given in the following embodiments
with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The present disclosure can be more fully understood by
reading the subsequent detailed description and examples with
references made to the accompanying drawings, wherein:
[0010] FIG. 1 is a cross sectional view of the display device of
the embodiment;
[0011] FIG. 2A shows the main structure of the display device of
the embodiment;
[0012] FIG. 2B is an enlarged view of portion 2B of FIG. 2A;
[0013] FIG. 3A shows the main structure of the display device of
another embodiment;
[0014] FIG. 3B is an enlarged view of portion 3B of FIG. 3A;
[0015] FIG. 4A shows a disclination line structure of an
embodiment;
[0016] FIG. 4B shows detailed structure of the disclination line
structure of the embodiment;
[0017] FIG. 4C shows the disclination line structure corresponding
to the display device;
[0018] FIG. 4D shows a display device of a modified embodiment;
[0019] FIG. 4E is an enlarged view of FIG. 4A;
[0020] FIG. 5A shows the main structure of the display device of
yet another embodiment;
[0021] FIG. 5B is an enlarged view of portion 5B of FIG. 5A;
and
[0022] FIG. 6 shows the main structure of the display device of
another embodiment, wherein the display device is a close-type
indium tin oxide (ITO) electrode display device.
DETAILED DESCRIPTION OF THE INVENTION
[0023] FIG. 1 shows a display device 1 of a first embodiment. The
display device 1 includes a first substrate 10, a second substrate
20, a liquid-crystal layer 30, a first electrode 100, and an
opposite electrode 21. The liquid-crystal layer 30 is disposed
between the first substrate 10 and the second substrate 20. The
first electrode 100 is disposed on the first substrate 10. The
opposite electrode 21 is disposed on the side of the second
substrate 20 that faces the first substrate 10. In more detail, the
liquid-crystal layer 30 is disposed between the first electrode 100
and the opposite electrode 21.
[0024] FIG. 2A shows the main structure of the display device 1.
The first electrode 100 comprises a first main portion 110 and a
plurality of first extending portions 120. The first extending
portions 120 are connected to the first main portion 110. In one
embodiment, the first main portion 110 is a cross-shaped electrode
with horizontal axes and vertical axes. An included angle between
the horizontal axes or the vertical axes of the first extending
portions 120 and the first main portion 110 is between 10 degrees
and 80 degrees. FIG. 1 is a cross sectional view along I-I'
direction of FIG. 2A. With reference to FIGS. 2A and 2B, at least
one of the first extending portions 120 comprises a first side 121,
a second side 122 and a curved side 123. At FIG. 1, a horizontal
distance between the first side 121 and a point of the vertical
axis of the first main portion 110 is shorter than a horizontal
distance between the second side 122 and the point of the vertical
axis of the first main portion 110. In another words, the first
side 121 is relatively adjacent to the vertical axis of the first
main portion 110. The second side 122 is relatively away from the
vertical axis of the first main portion 110. The curved side 123
includes a first round corner 124. The first round corner 124
includes a first round corner end 125 connected to the first side
121. The first round corner 124 has a first curvature radius
greater than zero. In one embodiment, the first curvature radius is
smaller than or equal to 5 .mu.m. In one embodiment, the first side
121 is parallel to the second side 122.
[0025] With reference to FIGS. 3A and 3B, in another embodiment,
the curved side 123 has a second round corner 126. A third round
corner end 127 of the second round corner 126 is connected to the
second side 122. The second round corner 126 has a second curvature
radius greater than zero. The first round corner 124 is located
between the second round corner 126 and the first side 121. The
second curvature radius is smaller than the first curvature
radius.
[0026] With reference to FIG. 2A, the display device further
comprises a first sub-pixel area R1 and a second sub-pixel area R2
adjacent to the first sub-pixel area R1. The first electrode 100 is
disposed in the first sub-pixel area R1. The second electrode 200
is disposed on the first substrate 10 and located in the second
sub-pixel area R2. The second electrode 200 comprises a second main
portion 210 and a plurality of second extending portions 220, and
the second extending portions 220 are connected to the second main
portion 210. A common electrode 40 is disposed on the first
substrate 10 and at least partial of the common electrode 40
located between the first sub-pixel area R1 and the second
sub-pixel area R2. In one embodiment, the first extending portions
120 extend from the first main portion 110 toward the common
electrode 40. An electrical potential (voltage) difference between
the first electrode 100 and the second electrode 200 is greater
than zero.
[0027] In more detail, the display device further comprises a
plurality of scan lines SL and a plurality of data lines DL. With
reference to FIGS. 2A and 2B, the two adjacent scan lines and the
two adjacent data lines defined a pixel area PA, and at least
partial of the first sub-pixel area R1 and the second sub-pixel
area R2 are located in the pixel area PA.
[0028] With reference to FIGS. 2A and 2B, a virtual line L is
parallel to the common electrode 40. A second round corner end 128
of the first round corner 124 is a tangent point of the curved
structure 123 and the virtual line L.
[0029] With reference to FIG. 2A, in one embodiment, the horizontal
width Wh of a part of the first extending portions 120 relatively
adjacent to the common electrode 40 is shorter than the horizontal
width Wh of a part of the first extending portions 120 relatively
adjacent to the first main portion 110. The horizontal width Wh is
the line width parallel to the common electrode 40 or the scan line
SL.
[0030] Utilizing the curved side mentioned above, the arrangement
of the liquid-crystal molecules is improved, and the light
transmittance and the response time are increased. When the first
curvature radius is greater than zero and smaller than 10 .mu.m,
the light transmittance is increased under any driving voltage. In
another embodiment, the first curvature radius could be smaller
than 10 .mu.m Additionally, the curved side of the embodiment is
relatively retracted compared to the conventional structure. When
the display device is recovered from being pressed (for example, by
a finger) in a short period, the liquid-crystal molecules have
greater space, and the liquid-crystal molecules return to their
original positions rapidly, and the retention time is decreased.
Similarly, the design of second round corner also improves
retention time. However, when the first curvature radius is greater
than 10 .mu.m, the light transmittance may be decreased. Therefore,
in another embodiment, the first curvature radius be greater than
zero and smaller than or equal to 5 .mu.m.
[0031] With reference to FIG. 2A, in one embodiment, a part of the
first extending portions 120 and a part of the second extending
portions 220 are staggered relative to common electrode 40.
Specifically, the parts of the first extending portions 120
adjacent to the vertical axis of the first main portion 110 are
arranged corresponding to the second extending portions 220
adjacent thereto. The parts of the first extending portions 120
away from the vertical axis of the first main portion 110 are
staggered with the second extending portions 220 adjacent thereto,
the first extending portions 120 and the second extending portions
220 are positioned at the opposite side of the common electrode 40.
In other words, a part of the first extending portions 120 with
relatively longer length are staggered with the second extending
portion 220 adjacent thereto. In another embodiment, two of the
first extending portions 120 with the longest length are staggered
with the second extending portion 220 adjacent thereto.
[0032] With reference to FIG. 4A, in one embodiment, a disclination
line structure 300 is formed between the first sub-pixel area R1
and the second sub-pixel area R2. The disclination line structure
300 comprises a first disclination line area 311 and two second
disclination line areas 312. The first disclination line area 311
is located between the two second disclination line areas 312. The
width W1 of one of the second disclination line areas 312 away from
an end of the first disclination line area 311 perpendicular to an
extending direction of the common electrode 40 is greater than the
minimum width W2 of the first disclination line area 311
perpendicular to the extending direction of the common electrode
40. With reference to FIG. 4C, in this embodiment, the first
extending portion 120 and the second extending portion 220 are
retracted in the second disclination line areas 312. The first
extending portion 120 is retracted upwardly, and the second
extending portion 220 is retracted downwardly. Therefore, the width
of the second disclination line areas 312 away from an end of the
first disclination line area 311 perpendicular to an extending
direction of the common electrode 40 is greater than the minimum
width of the first disclination line area 311 perpendicular to the
extending direction of the common electrode 40.
[0033] With reference to FIG. 4D, in one embodiment, the tilt
angles of the first extending portions 120 are gradually changed.
For example, the tilt angle .theta.3 of the first extending
portions 120 adjacent to the vertical axis of the first main
portion 110 is 45 degrees, and the tilt angle .theta.4 of the first
extending portions 120 away from the vertical axis of the first
main portion 110 is greater than 45 degrees. Therefore, the width
of the second disclination line areas 312 away from an end of the
first disclination line area 311 perpendicular to an extending
direction of the common electrode 40 is greater than the minimum
width of the first disclination line area 311 perpendicular to the
extending direction of the common electrode 40.
[0034] Additionally, by modifying the distance between the first
extending portion 120 and the second extending portion 220 and the
data lines adjacent thereto, the width of one of the second
disclination line areas 312 away from an end of the first
disclination line area 311 perpendicular to an extending direction
of the common electrode 40 is greater than the minimum width of the
first disclination line area 311 perpendicular to the extending
direction of the common electrode 40. By modifying the cell gap and
the pre-tilt angle, the width of one of the second disclination
line areas 312 away from an end of the first disclination line area
311 perpendicular to an extending direction of the common electrode
40 is greater than the minimum width of the first disclination line
area 311 perpendicular to the extending direction of the common
electrode 40. Particularly, the common electrode 40 between the
first sub-pixel area R1 and the second sub-pixel area R2 is
parallel to the scan lines. Therefore, the width of the second
disclination line areas 312 away from an end of the first
disclination line area 311 perpendicular to an extending direction
of the scan line is greater than the minimum width of the first
disclination line area 311 perpendicular to the extending direction
of the scan line.
[0035] With reference to FIG. 4A, in one embodiment, the
disclination line structure 300 comprises a disclination line main
portion 320 and a plurality of top indentations 330 and bottom
indentations 340 respectively located at two sides of the
disclination line main portion 320. A portion of the top
indentations 330 are staggered with the bottom indentations 340
corresponding thereto. In one embodiment, the top indentations 330
and the bottom indentations 340 are hook-shaped. In more detail,
the first disclination line area 311 comprises at least four top
indentations 330 located on both sides of the vertical axis of the
first main portion (two top indentations on right side and two top
indentations on left side) and at least four bottom indentations
340 located on both sides of the vertical axis of the second main
portion (two bottom indentations on the right side and two bottom
indentations on the left side).
[0036] With reference to FIGS. 4B and 4E, a virtual line segment
339 is defined as the location where one of the top indentations
330 connect to the disclination line main portion 320. The virtual
line segment 339 is parallel to the common electrode 40. One of the
top indentations 330 comprises a first disclination line side 331
and a second disclination line side 332. The first disclination
line side 331 is relatively adjacent to the center of the
disclination line main portion 320. The second disclination line
side 332 is relatively away from the center of the disclination
line main portion 320. An included angle .theta.2 between the first
disclination line side 331 and the virtual line segment 339 is
greater than an included angle .theta.1 between the second
disclination line side 332 and the virtual line segment 339, and
the first included angle .theta.1 and the second included angle
.theta.2 are inside the top indentation. In another embodiment,
first disclination line side 331 connects the second disclination
line side 332 at a turning point 333, a connection line is defined
as between the turning point 333 and an end of the first
disclination line side 331 away from the turning point 333, and an
included angle .theta.3 between the connection line and the virtual
line segment 339 is greater than an included angle .theta.1 between
the second disclination line side 332 and the virtual line segment
339, the included angle .theta.3 is obtuse angle.
[0037] With reference to FIG. 4E, in one embodiment, the first
disclination line side 331 connects the second disclination line
side 332 at a turning point 333, and an area of the top indentation
330 is smaller than a triangle area enclosed by two ends of the
virtual line segment 339 and the turning point 333 (as presented in
dot lines). In one embodiment, the first disclination line side 331
is curved.
[0038] The disclination line structure 300 decreases retention
time. The top indentations 330 and the bottom indentations 340 can
be defined by the binarization image of the disclination line. In
one embodiment, the included angle .theta.1 of each of the top
indentations 330 away from the center of the disclination line main
portion is smaller than the included angle .theta.2 adjacent to the
center of the disclination line main portion. In one embodiment,
parts of the top indentations 330 are staggered with the
corresponding bottom indentations 340. Additionally, the top
indentations 330 away from the center of the disclination line main
portion are staggered with the corresponding bottom indentations
340, and the visual angle is made uniform.
[0039] With reference to FIGS. 5A and 5B, in another embodiment,
the first electrode 100 comprises a first main portion 110 and a
plurality of first extending portions 120. The first extending
portions 120 are connected to the first main portion 110. At least
one of the first extending portions 120 comprises a first side 121,
a second side 122, and a curved side 123'. The first side 121 is
parallel to the second side 122. The curved side 123' connects the
first side 121 and the second side 122. The first side 121 connects
to the first main portion 110 at a first end point 131. The second
side 122 connects to the first main portion 110 at a second end
point 132. The curved side 123' connects to the first side 121 at a
third end point 133. The curved side 123' connects to the second
side 122 at a fourth end point 134. The area of the first extending
portion 120 is greater than a quadrilateral area enclosed by the
first end point 131, the second end point 132, the third end point
133, and the fourth end point 134.
[0040] The embodiment can also be utilized in a close-type indium
tin oxide (ITO) electrode display device. In this embodiment, a
common electrode, an insulation layer and a first electrode are
sequentially disposed on the first substrate. An opposite electrode
is disposed on the second substrate. With reference to FIG. 6, the
first electrode 400 comprises a cross-shaped main portion 410, a
peripheral portion 420 and a plurality of extending portions 430
connected to the main portion 410 and the peripheral portion 420. A
gap 440 is formed between the extending portions 430. The
peripheral portion 420 comprises at least one curved side 421. In
one embodiment, the peripheral portion 420 comprises a fifth side
422 and a sixth side 423. The fifth side 422 is parallel to the
horizontal axis of the cross-shaped main portion 410. The sixth
side 423 is parallel to the vertical axis of the cross-shaped main
portion 410. The curved side 421 connects the fifth side 422 at a
fifth tangent point, and the curved side 421 connects the sixth
side 423 at a sixth tangent point.
[0041] Use of ordinal terms such as "first", "second", "third",
etc., in the claims to modify a claim element does not by itself
connote any priority, precedence, or order of one claim element
over another or the temporal order in which acts of a method are
performed, but are used merely as labels to distinguish one claim
element having a certain name from another element having the same
name (but for use of the ordinal term).
[0042] While the disclosure has been described by way of example
and in terms of the preferred embodiments, it is to be understood
that the disclosure is not limited to the disclosed embodiments. On
the contrary, it is intended to cover various modifications and
similar arrangements (as would be apparent to those skilled in the
art). Therefore, the scope of the appended claims should be
accorded the broadest interpretation so as to encompass all such
modifications and similar arrangements.
* * * * *