To provide an electro-optical device and an electronic apparatus capable of maintaining the display quality by preventing brightness unevenness without widening a frame in a mounting terminal portion connection portions connecting to a fourth power source bus line are provided in two places. driving current is supplied from the connection portions to the fourth power source bus line. The width of the fourth power source bus line is smaller than that of the width of a power source bus line supplying driving current from one place of the mounting terminal portion.

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Patent
   RE44086
Priority
Jun 21 2002
Filed
Apr 08 2010
Issued
Mar 19 2013
Expiry
Jun 13 2023
Inventors
Hirayama, …
Assg.orig
Seiko Epso…
Assg.curr
BOE TECHNO…
Entity
Large
Referenced by
6
References
13
Maint.:
all paid
0. 25. An electro-optical device, comprising:
an electro-optical element;
a power source line; and
a data signal line having an opening portion,
the opening portion of the data signal line being provided at an intersection between the data signal line and the power source line,
a first width that is a total width of the data signal line at the intersection other than the opening portion being smaller than a second width which is a total width at any one of parts where the data signal line does not intersect the power source line.
0. 21. An electro-optical device, comprising:
an electro-optical element;
a power source line having an opening portion; and
a data signal line,
the opening portion of the power source line being provided at an intersection between the power source line and the data signal line,
a first width that is a total width of the power source line at the intersection other than the opening portion being smaller than a second width which is a total width at any one of parts where the power source line does not intersect the data signal line.
0. 19. An electro-optical device, comprising:
an electro-optical element;
a first wiring line that controls a driving power to the electro-optical element, the first wiring line having an opening portion; and
a second wiring line that controls a control signal controlling the electro-optical element,
the opening portion of the first wiring line being provided at an intersection between the first wiring line and the second wiring line,
a first width that is a total width of the first wiring line at the intersection other than the opening portion being smaller than a second width which is a total width at any one of parts where the first wiring line does not intersect the second wiring line.
0. 23. An electro-optical device, comprising:
an electro-optical element;
a first wiring line that controls a control signal controlling the electro-optical element, the first wiring line having an opening portion; and
a second wiring line that controls a driving power to the electro-optical element,
the opening portion of the first wiring line being provided at an intersection between the first wiring line and the second wiring line,
a first width that is a total width of the first wiring line at the intersection other than the opening portion being smaller than a second width which is a total width at any one of parts where the first wiring line does not intersect the second wiring line.
0. 20. An electro-optical device, comprising:
a plurality of electro-optical elements;
a display portion having the plurality of electro-optical elements;
a first wiring line that controls a driving power to the electro-optical element, the first wiring line having an opening portion; and
a second wiring line that controls a control signal controlling the electro-optical element,
the opening portion of the first wiring line being provided at an intersection between the first wiring line and the second wiring line,
a first width that is a total width of the first wiring line at the intersection other than the opening portion being smaller than a second width which is a total width at any one of parts where the first wiring line does not intersect the second wiring line.
0. 24. An electro-optical device, comprising:
an electro-optical element;
a first wiring line that controls a control signal controlling the electro-optical element, the first wiring line having an opening portion and extending along a first direction; and
a second wiring line that controls a driving power to the electro-optical element, the second wiring line extending along a second direction intersecting the first direction,
the first wiring line intersecting the second wiring line at a first part of the first wiring line,
the first wiring line not intersecting the second wiring line at a second part of the first wiring line,
a first distance that is a distance along the second direction between a first edge that is an outmost edge of the first part and a second edge that is an outmost edge of the first part positioned at a position opposite to the first edge being smaller than a second distance that is a distance along the second direction between a third edge that is an outmost edge of the second part and a fourth edge that is an outmost edge of the second part positioned at a position opposite to the third edge.
0. 22. An electro-optical device, comprising:
an electro-optical element;
a first wiring line that controls a driving power to the electro-optical element, the first wiring line having an opening portion, the first wiring line extending along a first direction; and
a second wiring line that controls a control signal controlling the electro-optical element, the second wiring line extending along a second direction intersecting the first direction,
the first wiring line intersecting the second wiring line at a first part of the first wiring line,
the first wiring line not intersecting the second wiring line at a second part of the first wiring line,
a first distance that is a distance along the second direction between a first edge that is an outmost edge of the first part and a second edge that is an outmost edge of the first part positioned at a position opposite to the first edge being smaller than a second distance that is a distance along the second direction between a third edge that is an outmost edge of the second part and a fourth edge that is an outmost edge of the second part positioned at a position opposite to the third edge.
0. 1. An electro-optical device, comprising:
a plurality of pixel circuits that are provided in an effective region of a base and each of which includes an electro-optical element;
a first wiring line through which one of a control signal and a driving power is supplied to the plurality of pixel circuits; and
a second wiring line through which the other of the control signal and the driving power is supplied to the plurality of pixel circuits,
the first wiring line intersecting the second wiring line at an intersection that is located between the effective region and at least one edge of a plurality of edges constituting an outline of the base, and
the first wiring line having a first portion and a second portion whose width is narrower than a width of the first portion, and
the second portion being provided at the intersection.
0. 2. The electro-optical device according to claim 1,
the second wiring line being provided in a layer in which the first wiring line is not formed.
0. 3. The electro-optical device according to claim 1,
the second wiring line having a third portion and a fourth portion whose width is narrower than a width of the third portion, and the fourth portion being provided at the intersection.
0. 4. The electro-optical device according to claim 1, the narrow portions being provided near one of the ends in the width direction of corresponding wiring lines.
0. 5. The electro-optical device according to claim 1, the narrow portions are formed by cutting out portions at both ends in the width direction of the corresponding wiring lines.
0. 6. The electro-optical device according to claim 1,
the path being provided corresponding to the second portion.
0. 7. The electro-optical device according to claim 1,
the control signal being supplied to the plurality of pixel circuits through the first wiring line, and
the driving power being supplied to the plurality of pixel circuits through the second wiring line.
0. 8. The electro-optical device according to claim 7, the first wiring line comprising:
a main wiring line portion provided in the same wiring line layer as the second wiring line;
a bypass wiring line portion provided in a different wiring line layer from the second wiring line and intersecting the second wiring line at a different layer; and
a connection position to connect the main wiring line portion and the bypass wiring line portion to each other.
0. 9. The electro-optical device according to claim 7, the second wiring line comprising:
a main wiring line portion provided in the same wiring line layer as the first wiring line;
a bypass wiring line portion provided in a different wiring line layer from the first wiring line and intersecting the first wiring line at a different layer; and
a connection position to connect the main wiring line portion and the bypass wiring line portion to each other.
0. 10. The electro-optical device according to claim 7, the first wiring line being provided in a different wiring line layer from the second wiring line and intersects the second wiring line at a different layer.
0. 11. The electro-optical device according to claim 7, the first wiring line having narrow portions at intersections between the narrow portions of the second wiring line and the first wiring line.
0. 12. The electro-optical device according to claim 11, the narrow portions of the plurality of power source bus lines being symmetric with respect to the longitudinal line passing through the width-wise center of the plurality of power source bus lines.
0. 13. The electro-optical device according to claim 7, each of a plurality of second wiring lines being separated from another second wiring line by a constant spacing at the narrow portions.
0. 14. The electro-optical device according to claim 7, part or all of the narrow portions of one of the second wiring lines overlap the region where another second wiring line would be if it did not have a narrow portion.
0. 15. The electro-optical device according to claim 7, the plurality of electro-optical elements with different characteristics being characterized in that among the electro-optical elements are those emitting different color lights.
0. 16. An electronic apparatus, comprising:
an electro-optical device according to claim 1;
a driving power source circuit connected to the electro-optical device to supply a driving power source to wiring lines to supply the driving power source or to the power source bus lines; and
a control signal generating circuit connected to the electro-optical device to supply control signals to wiring lines to supply the control signal or to the signal lines.
0. 17. An electro-optical device, comprising:
an electro-optical element;
a first wiring line through which one of a control signal and a driving power is supplied to the electro-optical element, the first wiring line having a first portion and a second portion; and
a second wiring line through which the other of the control signal and the driving power is supplied to the electro-optical element,
the second wiring line having a third portion, a fourth portion and a fifth portion that connects the third portion and the fourth portion,
the second portion of the first wiring line intersecting the fifth portion of the second wiring line,
the third portion and the first wiring line being provided in a first wiring layer, and
the fifth portion being provided in a second wiring layer where the first wiring line is not formed, and
a width of the second portion being narrower than a width of the first portion.
0. 18. The electro-optical device according to claim 17,
wherein the intersection between the first wiring line and the second wiring line is located between an effective region and at least one edge of a plurality of edges constituting an outline of a base.

Wherein, L1 represents the length of the narrow portion 310a and L2 represents the length of the other portion 310a.

When the ratio between the line width W2 and W0 is obtained based on the length of the narrow portion 310a and the length of the other portion 310a according to the present exemplary embodiment using the equation 1, it is noted that, in the case where the width W1 of the narrow portions 310a is set to be about 1/10 of W2, W2 is set to be about twice W0.

Eleventh Exemplary Embodiment of Electro-Optical Device

FIG. 22 is a plan view of an electro-optical device according to an eleventh exemplary embodiment of the present invention. FIG. 23 is a perspective view of the structure of the intersection (a perspective view taken along the plane A-A in FIG. 22). According to the present exemplary embodiment, the display data signal line 53 and the power source bus line 310 are formed in the same layer. At the intersection between the display data signal line 53 and the power source bus line 310, the display data signal line 53 goes over the power source bus line 310 with a bypass conductive line made of Si containing impurities with a larger sheet resistance value than that of the metal. At the intersection, the bypass wiring line 57 of the display data signal line 53 faces the power source bus line 310 with an interlayer insulating layer 56 of a thickness of several hundred nm interposing between the bypass wiring line 57 and the power source bus line 310.

The power source bus line 310 includes narrow portions 310a at the intersection between the power source bus line 310 and the display data signal lines 53, thereby to reduce the length of the bypass wiring line 57 of the display data signal line 53.

The bypass wiring line 57 is made of Si containing impurities with a much higher sheet resistance value than that of Al or AlSiCu of the alloy of Al, of which the display data signal line 53 is formed as mentioned above. Therefore, it is possible to reduce the total amount of wiring line resistance by reducing the length of the bypass wiring line 57. Since the narrow portion of the power source bus line intersects the bypass wiring line 57 of the display data signal line, it is possible to reduce the area of the intersection between the bypass wiring line 57 and the power source bus line, thereby to reduce the parasitic capacitance generated at the intersection.

In the case where a wiring line layer with the bypass wiring line 57 is also formed of a material with a small sheet resistance value such as Al or AlSiCu of the alloy of Al, it is possible to simplify the structure of the wiring layer by arranging the power source bus line 310 and the display data signal line 53 in different wiring layers so that they can intersect each other without one bypassing at the intersection as above.

In this regard, the narrow portion 310a of the power source bus line 310 intersects the display data signal lines 53, and thus it is possible to reduce the area of the intersection. Thereby, it is possible to reduce the parasitic capacitance generated in the corresponding intersection.

In FIG. 23, the display data signal line 53 and the power source bus line 310 are formed in the same layer. At the intersection between the display data signal line 53 and the power source bus line 310, the display data signal line 53 crosses over the power source bus line 310 by a bypass conductive line made of Si containing the impurities with a larger sheet resistance value than that of the metal. However, the power source bus line 310 may go over the display data signal line 53 by a bypass conductive line made of Si containing the impurities with a larger sheet resistance value than that of the metal.

Here also, the narrow portion 310a of the power source bus line 310 intersects the display data signal line 53. Thus, it is possible to reduce the area of the intersection between the display data signal line 53 and the power source bus line 310 and thereby to reduce the parasitic capacitance generated in the corresponding intersection.

Twelfth Exemplary Embodiment of Electro-Optical Device

FIG. 24 illustrates an electro-optical device according to a twelfth exemplary embodiment of the present invention. In FIG. 24, the same reference numerals indicate the same elements as those of FIG. 21.

According to the tenth and eleventh exemplary embodiments, only one power source bus line 310 is provided at one side of the frame portion 101 where the mounting terminal portion 102 is provided corresponding to all of the red, green, and blue electro-optical elements (not shown). However, the electro-optical device of the present exemplary embodiment provides separate power source bus lines for the respective red, green, and blue electro-optical elements. Therefore, it is possible to supply the optimal driving voltage to the respective color electro-optical elements even if the optimal driving voltages of the respective colors electro-optical elements vary.

As illustrated in FIG. 24, three power source bus lines parallel to each other are connected to the mounting terminal portion 102 from the left upper portion of FIG. 23. That is, the electro-optical device according to the present exemplary embodiment includes a power source bus line 320 for the red electro-optical element, a power source bus line 321 for the blue electro-optical element, and a power source bus line 322 for the green electro-optical element.

Conditions such as the sizes of narrow portions 320a, 321a, and 322a provided in the respective power source bus lines 320, 321, and 322 are the same as those of the electro-optical device according to the tenth exemplary embodiment. According to the present exemplary embodiment, it is possible to obtain the same effects as those of the tenth exemplary embodiment. Furthermore, current is supplied from the independent power source bus lines to the red, green, and blue electro-optical devices, and thus it is possible to appropriately control the driving voltages supplied to the red, green, and blue current-driven elements. Therefore, it is possible to obtain an electro-optical device with excellent efficiency and a suppressed display unevenness.

According to a modification of the twelfth exemplary embodiment of the present invention, which is illustrated in FIG. 25, it is possible to change the arrangement of mounting terminals for a power source bus line. According to the present modification, the mounting terminal of a power source bus line 330 for red is arranged to be separated from the mounting terminals of the power source bus lines 320 and 321 for other colors. That is, the mounting terminal of the power source bus line for red is arranged in one end of the mounting terminal portion 102, and the mounting terminals of the power source bus lines for the other colors are arranged in the other end of the mounting terminal 102. It is preferable that the power source bus lines be arranged in the ends of the mounting terminal 102 and to assign a plurality of terminals to each end in order to secure current capacitance. It is possible to set the width of the right and left frames with excellent balance by arranging the mounting terminals of the power source bus lines 320, 321, and 330 in both ends of the mounting terminal portion 102 according to the present modification. Therefore, it is possible for the electro-optical device to have a structure with excellent balance.

Thirteenth Exemplary Embodiment of Electro-Optical Device

FIG. 26 is a plan view illustrating the intersection of an electro-optical device according to a thirteenth exemplary embodiment of the present invention. FIG. 27 is a perspective view illustrating the structure of the corresponding intersection (a perspective view of section along the line B-B in FIG. 26). According to the present exemplary embodiment, the display data signal line 53 and power source bus lines 340, 341, and 342 are formed in the same layer. At the intersection, the display data signal line 53 cross over the power source bus lines 340, 341, and 342 by the bypass wiring line 57 made of Si containing the impurities with a larger sheet resistance value than that of the metal material. At the intersection, the bypass wiring line 57 of the display data signal line 53 faces the power source bus lines 340, 341, and 342 with an interlayer insulating layer 56 of a thickness of several hundred nm therebetween.

The power source bus lines 340, 341, and 342 have narrow portions 340a, 341a, and 342a at the intersections between the power source bus lines 340, 341, and 342 and the display data signal line 53. Therefore, it is possible to reduce the length of the bypass wiring line 57 of the display data signal line 53. According to the present exemplary embodiment, the distance between the power source bus lines in the narrow portions 340a, 341a, and 342a is almost equal to that at the other portions, so that it is possible to further reduce the total of the widths of the narrow portions and the distances between the power source bus lines and thereby to further reduce the length of the bypass wiring line 57.

In the case where the wiring line layer with the bypass wiring line 57 is made of a material with a small sheet resistance value such as Al or AlSiCu of the alloy of Al, it is possible to simplify the structure of the wiring layer by arranging the power source bus lines 340, 341, and 342 and the display data signal line 53 in different wiring layers that intersect each other without bending at the intersection as mentioned above.

Here also, the narrow portions 340a, 341a, and 342a of the power source bus lines 340, 341, and 342 intersect the display data signal line 53. Therefore, it is possible to reduce the areas of the intersection and thereby to reduce the parasitic capacitance generated in the corresponding intersection.

In FIG. 27, the display data signal line 53 and the power source bus lines 340, 341, and 342 are formed in the same layer. At the intersection between the display data signal line 53 and the power source bus lines 340, 341, and 342, the display data signal line 53 crosses under the power source bus lines 340, 341, and 342 by a bypass conductive line made of Si containing impurities and with a larger sheet resistance value than that of the metal. However, the power source bus lines 340, 341, and 342 may cross over the display data signal line 53 by a bypass conductive line made of Si containing the impurities and with a larger sheet resistance value than that of the metal.

Here also, the narrow portions 340a, 341a, and 342a of the power source bus lines 340, 341, and 342 intersect the display data signal line 53. Thus, it is possible to reduce the area of the intersection and thereby to reduce the parasitic capacitance generated in the corresponding intersection.

In another aspect, part of the narrow portion 340a of the power source bus line 340 (the inclined line portion of the narrow portion 340a in FIG. 26) overlaps the extended portion (the two dot chain line marked to the power source bus line 341 in FIG. 26) of a normal portion (a portion other than the narrow portion) of another power source bus line 341. This shows that it is possible to arrange the narrow portions of the plurality of power source bus lines to be close to each other and to reduce the length of the bypass wiring line 57 that collectively detours the narrow portions of the plurality of power source bus lines. According to the present exemplary embodiment, some of the narrow portion 340a overlaps the extended portion of the normal portion. However, the entire narrow portion 340a may overlap the corresponding portion to obtain the same effect.

In another aspect, the plurality of narrow portions is almost symmetric with respect to the central line P (FIG. 26) of the plurality of power source bus lines. Therefore, it is possible to reduce the sum of the lengths of the narrow portions of the respective power source bus lines and to reduce the amount of the increase in the resistance value in the narrow portions.

Electronic Apparatus

Exemplary embodiments of an electronic apparatus with the electro-optical device will now be described.

FIG. 15(a) is a perspective view illustrating an example of a mobile telephone. In FIG. 15(a), a mobile telephone main body 210 includes a display portion 210 using the aforementioned electro-optical device.

FIG. 15(b) is a perspective view illustrating an example of a wristwatch type electronic apparatus. In FIG. 15(b), a watch main body 220 includes a display portion 221 using the aforementioned electro-optical device.

FIG. 15(c) is a perspective view illustrating an example of portable information processing devices such as word processors and personal computers. In FIG. 15(c), an information processing device 230 includes an input portion 231 such as a keyboard, a main body 232 of information processing device, and a display portion 233 using the aforementioned electro-optical device 233.

In the electronic apparatuses illustrated in FIGS. 15(a) to 15(c), the display portion is a significantly important element. Their practical performance is significantly affected by the display quality of the display portion. Therefore, the electronic apparatus according to the present exemplary embodiment may become a high performance electronic apparatus having a display portion with excellent display quality by including the aforementioned electro-optical device according to the present exemplary embodiment with an excellent light emitting gray scale characteristic.

The electro-optical device and the electronic apparatus according to the present exemplary embodiment are described. However, the present invention is not limited to the above exemplary embodiment and can be modified within the scope of the present invention.

For example, the seventh exemplary embodiment illustrated in FIG. 11 includes the thirteenth power source bus line 60 with the conductive portion 60a connected parallel to the conductive portion 50a of the eleventh power source bus line 50 and connected from the fourth region 101d to the mounting terminal portion 102. However, according to the present invention, it is possible to expand the above structure. That is, as illustrated in FIG. 16, it is possible to form a power source bus line 80 so as to surround the matrix display portion 100 by connecting the eleventh power source bus line 50 in FIG. 11 to the thirteenth power source bus line 60 in FIG. 11. Thereby, it is possible to prevent the voltage drop without widening the width of the power source bus line, that is, without widening the region of the frame portion 101 in which the power source bus line is arranged.

Furthermore, the ninth exemplary embodiment illustrated in FIG. 14 includes three groups of power source bus lines corresponding to the red, green, and blue current-drive elements, and the twentieth, twenty first, and twenty second power source bus lines 76, 77, and 78 arranged in the first region 101a are connected from the fourth region 101d to the mounting terminal 102 as in the seventh exemplary embodiment. However, here also it is possible to expand the structure of the power source bus line. That is, as illustrated in FIG. 17, it is possible to form the power source bus lines 80, 81, and 82 so as to surround the matrix display portion 100 by connecting the power source bus lines in FIG. 14 to the corresponding colors, respectively. By doing so, it is possible to obtain the same effects as those of the seventh exemplary embodiment.

According to the fourth, fifth, eighth, and ninth embodiments, the number of power source bus lines is three so as to supply current to the respective red, green, and blue current-driven elements. However, the present invention is not limited thereto. That is, two power source bus lines, one for the red current-driven element and the other for the green and blue current-driven elements may be used. According to the present structure, it is possible to appropriately control the current values supplied to the current-driven elements of the respective colors of red and green+blue. Therefore, it is possible to obtain an electro-optical device with excellent efficiency and suppressed display irregularity. Furthermore, it is possible to make the entire electro-optical device be a structure with excellent balance compared to a case where three power source bus lines are used.

According to the present exemplary embodiment, the narrow portions are formed in the power source bus line at the intersection between the power source bus line and the display data signal lines. However, the present invention is not limited thereto. For example, it is possible to make the width of the power source bus line uniform, to form narrow portions in the display data signal lines in the vicinity of the intersection with the power source bus line, or it is possible to form narrow portions in both the power source bus line and the display data signal lines at the intersection between the power source bus line and the display data signal lines. According to these structures, it is possible to reduce the parasitic electrostatic capacitance of the display data signal line and thereby to precisely supply current to the electro-optical element as in the above exemplary embodiment.

According to the above exemplary embodiment, as illustrated in FIGS. 21 to 25, the narrow portion 310a is concave. The narrow portion is formed in the edge of a wiring line in the width direction of the wiring line. Since it is possible to simplify the shape of the wiring line, it is possible to easily manufacture the wiring line and to prevent the generation of unnecessary radiation.

For example, as illustrated in FIG. 28(a), at the intersection between the display data signal line 53 and the power source bus line 350 with the width W2, the narrow portion 350a with the width W1 may be formed by providing concave portions on the left and right of the power source bus line. In doing so, current flows smoothly inside the wiring line. When the width of the wiring line is large, it is possible to reduce effective resistance below that where the narrow portion is formed at an edge.

Furthermore, as illustrated in FIG. 28(b), at the intersection between the display data signal line 53 and the power source bus line 60 with the width W2, it is possible to form a path with the an opening of a width W2-W1 on is formed in the power source bus line, thereby to provide a narrow portion 60a. Here also, there may be plural paths. The relationship between the width W1 and the width W2 is the same as that according to the tenth exemplary embodiment. According to the above structure, it is possible to obtain the same effects as those of the above exemplary embodiment. Furthermore, even if one wiring line is cut off by an external shock, it is possible to compensate for the damage with the remaining wiring lines by preparing the plurality of wiring lines of the narrow portion.

According to twelfth and thirteenth exemplary embodiments, the number of power source bus line is three, so as to supply current to the respective red, green, and blue electro-optical elements. However, the present invention is not limited thereto. For example, two power source bus lines, one for the red electro-optical element and the other for the green and blue electro-optical elements may be provided. According to the above structure, it is possible to appropriately set the voltages supplied to the red electro-optical element and to the green and blue electro-optical elements, respectively. Therefore, it is possible to obtain an electro-optical device with excellent efficiency and with a suppressed display irregularity. Furthermore, when an even number of power source bus lines is used, it is possible to have the excellent wiring line balance for the entire electro-optical device compared to the case where an odd number of power source bus lines is used.

Advantages

As mentioned above, according to the present invention, it is possible to narrow the frame. Also, it is possible to prevent the current unevenness and brightness unevenness without widening the frame and thereby to improve the display quality of the electro-optical device and the electronic apparatus.

Furthermore, according to the present invention, a narrow portion is provided at the intersection between the power source bus line and the display data signal line either in the power source bus line or in the display data signal line. Therefore, it is possible to reduce the parasitic electrostatic capacitance of the display data signal line. When the wiring line not provided with the narrow portion has a bypass wiring line layer with larger specific resistance, it is possible to reduce the length of the bypass wiring line and thereby to prevent the increase in the resistance of the corresponding wiring line. Therefore, it is possible to precisely supply current to the electro-optical element and thereby to obtain the excellent light emitting gray scale characteristic.

INVENTORS:

Hirayama, Hiroshi

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
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ASSIGNMENT RECORDS    Assignment records on the USPTO
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Nov 18 2014Seiko Epson CorporationBOE TECHNOLOGY HK LIMITEDASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0375150050 pdf
Feb 14 2015BOE TECHNOLOGY HK LIMITEDBOE TECHNOLOGY GROUP CO , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0375150082 pdf
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