A liquid crystal display including a plurality of parallel display electrodes wired over an electrode substrate, terminals for the display electrodes led out to the end portion of the electrode substrate and connected to TCPs, the terminals having pitches smaller than those of the display electrodes, and leadout wirings for connecting the display electrodes and the terminals. The leadout wirings each consist of a portion extending from a respective display electrode as it is, a portion extended from the respective terminals as it is, and almost parallel, inclined linear wiring that connects the two extended portions. The length of the two extended portions and the width of the inclined linear wiring are adjusted so that the wiring resistances of the individual leadout wirings are substantially equal.
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0. 25. A liquid crystal display device comprising:
a first substrate;
a second substrate which is arranged so as to be opposite to the first substrate and is joined with the first substrate by a sealant; and
liquid crystal which is interposed between the first substrate and the second substrate;
wherein the first substrate includes:
a plurality of display electrodes which are parallel to each other;
a plurality of terminals which are arranged at an outside of the sealant to which signals are supplied from a drive element; and
a plurality of leadout wirings each of which connects a corresponding one of the plurality of display electrodes with a corresponding one of the plurality of terminals;
wherein pitches of the plurality of terminals is smaller than pitches of the plurality of display electrodes;
wherein each of the plurality of leadout wirings includes:
an inclined linear wiring which is not parallel to the plurality of display electrodes; and
a portion which is connected with the inclined linear wiring and is parallel to the plurality of terminals;
assuming adjacent two display electrodes of the plurality of display electrodes are as a first display electrode and a second display electrode respectively, out of the plurality of inclined wirings, an inclined lead wiring which is connected with the first display electrode is as a first inclined linear wiring, an inclined linear wiring which is connected with the second display electrode is as a second inclined linear wiring, out of the plurality of portions each of which is connected with the inclined linear wiring and is parallel to the plurality of terminals, a portion which is connected with the first inclined linear wiring is as a first portion, a portion which is connected with the second inclined linear wiring is as a second portion,
a number of combinations of the adjacent two display electrodes each of which satisfies a condition that a length of the first portion is different from a length of the second portion, and in an area of the liquid crystal side of the sealant, the first inclined linear wiring is parallel to the second inclined linear wiring is larger than a number of combinations of the adjacent two display electrodes each of which does not satisfy the condition;
the combinations of the adjacent two display electrodes each of which satisfies the condition have approximately same gaps between the first inclined linear wiring and the second inclined linear wiring respectively.
0. 27. A liquid crystal display device comprising:
a first substrate;
a second substrate which is arranged so as to be opposite to the first substrate and is joined with the first substrate by a sealant; and
liquid crystal which is interposed between the first substrate and the second substrate;
wherein the first substrate is an active matrix substrate and includes:
a plurality of video signal lines which are parallel to each other;
a plurality of switching elements;
a plurality of terminals which are arranged at an outside of the sealant and to which signals are supplied from a drive element; and
a plurality of leadout wirings each of which connects a corresponding one of the plurality of video signal lines with a corresponding one of the plurality of terminals;
wherein pitches of the plurality of terminals is smaller than pitches of the plurality of video signal lines;
wherein each of the plurality of leadout wirings includes:
an inclined linear wiring which is not parallel to the plurality of video signal lines; and
a portion which is connected with the inclined linear wiring and is parallel to the plurality of terminals;
assuming adjacent two video signal lines of the plurality of video signal lines are as a first video signal line and a second video signal line respectively, out of the plurality of inclined wirings, an inclined linear wiring which is connected with the first video signal line is as a first inclined linear wiring, an inclined linear wiring which is connected with the second video signal line is as a second inclined linear wiring, out of the plurality of portions each of which is connected with the inclined linear wiring and is parallel to the plurality of terminals, a portion which is connected with the first inclined linear wiring is as a first portion, a portion which is connected with the second inclined linear wiring is as a second portion;
a number of combinations of the adjacent two video signal lines each of which satisfies a condition that a length of the first portion is different from a length of the second portion, and in an area of the liquid crystal side of the sealant, the first inclined linear wiring is parallel to the second inclined linear wiring is larger than a number of combinations of the adjacent two video signal lines each of which does not satisfy the condition;
the combinations of the adjacent two video signal lines each of which satisfies the condition have approximately same gaps between the first inclined linear wiring and the second inclined linear wiring respectively.
0. 26. A liquid crystal display device comprising:
a first substrate;
a second substrate which is arranged so as to be opposite to the first substrate and is joined with the first substrate by a sealant; and
liquid crystal which is interposed between the first substrate and the second substrate;
wherein the first substrate is an active matrix substrate and includes:
a plurality of scanning signal lines which are parallel to each other;
a plurality of switching elements;
a plurality of terminals which are arranged at an outside of the sealant and to which signals are supplied from a drive element; and
a plurality of leadout wirings each of which connects a corresponding one of the plurality of scanning signal lines with a corresponding one of the plurality of terminals;
wherein pitches of the plurality of terminals is smaller than pitches of the plurality of scanning signal lines;
wherein each of the plurality of leadout wirings includes:
an inclined linear wiring which is not parallel to the plurality of scanning signal lines; and
a portion which is connected with the inclined linear wiring and is parallel to the plurality of terminals,
assuming adjacent two scanning signal lines of the plurality of scanning signal lines are as a first scanning signal line and a second scanning signal line respectively, out of the plurality of inclined wirings, and inclined lead wiring which is connected with the first scanning signal line is as a first inclined linear wiring, an inclined linear wiring which is connected with the second scanning signal line is as a second inclined linear wiring, out of the plurality of portions each of which is connected with the inclined linear wiring and is parallel to the plurality of terminals, a portion which is connected with the first inclined linear wirings is as a first portion, a portion which is connected with the second inclined linear wiring is as a second portion,
a number of combinations of the adjacent two scanning signal lines each of which satisfies a condition that a length of the first portion is different from a length of the second portion, and in an area of the liquid crystal side of the sealant, the first inclined linear wiring is parallel to the second inclined linear wiring is larger than a number of combinations of the adjacent two scanning signal lines each of which does not satisfy the condition,
the combinations of the adjacent two scanning signal lines each of which satisfies the condition have approximately same gaps between the first inclined linear wiring and the second inclined linear wiring respectively.
0. 1. A liquid crystal display suitable for high-quality display comprising:
a pair of liquid crystal device substrates so arranged as to be opposite to each other and joined together by a sealant with a liquid crystal interposed therebetween; and
a plurality of liquid crystal drive elements connected to wirings on the liquid crystal device substrate and provided to drive the liquid crystal;
wherein the liquid crystal device substrates are provided with:
a plurality of parallel display electrodes;
a plurality of parallel terminal electrodes led out to the end portion of the liquid crystal device substrates, connected to the liquid crystal drive elements, and arranged at pitches smaller than those of the display electrodes parallelly to the display electrodes; and
a plurality of wirings including almost mutually parallel, inclined linear wiring electrodes for connecting the display electrodes and the terminal electrodes; and
wherein the lengths of the terminal electrodes and the widths of the inclined linear wiring electrodes are adjusted so that each resistances of each set of the terminal electrodes and each set of the inclined linear wiring electrodes are substantially equal.
0. 2. A liquid crystal display according to
0. 3. A liquid crystal display according to
0. 4. A liquid crystal display according to one of
0. 5. A liquid crystal display according to one of
0. 6. A liquid crystal display according to
0. 7. A liquid crystal display according to
0. 8. A liquid crystal display according to one of
0. 9. A liquid crystal display according to
0. 10. A liquid crystal display suitable for high-quality display comprising:
a pair of liquid crystal device substrates so arranged as to be opposite to each other and joined together by a sealant with a liquid crystal interposed therebetween; and
a plurality of liquid crystal drive elements connected to wirings on the liquid crystal device substrates and provided to drive the liquid crystal;
wherein the liquid crystal device substrates are provided with:
a plurality of parallel display electrodes;
a plurality of parallel terminal electrodes led out to the end portion of the liquid crystal device substrates, connected to the liquid crystal drive elements, and arranged at the terminal electrodes pitches smaller than those of the display electrodes parallelly to the display electrodes;
a plurality of wirings including almost mutually parallel, inclined linear wiring electrodes for connecting the display electrodes and the terminal electrodes; and
a color filter formed on one of the liquid crystal device substrates; and
wherein the lengths of the terminal electrodes and the widths of the inclined linear wiring electrodes are so adjusted so that each resistances of each set of the terminal electrodes and each set of the inclined linear wiring electrodes are substantially equal to each other.
0. 11. A liquid crystal display according to
0. 12. A liquid crystal display according to
0. 13. A liquid crystal display according to one of
0. 14. A liquid crystal display according to one of
0. 15. A liquid crystal display according to
0. 16. A liquid crystal display according to
0. 17. A liquid crystal display according to one of
0. 18. A liquid crystal display according to
0. 19. A liquid crystal display having plural tape carrier packages comprising:
a pair of substrates so arranged as to be opposite to each other;
a liquid crystal layer interposed between said pair of substrates and a sealant to join said pair of substrates together; and
a plurality of tape carrier packages each having a drive circuit connected to terminal electrodes on the substrates; and
wherein one of said substrates includes:
first and second display electrodes disposed inside said sealant in parallel with each other, each display electrode having a first width W(LCD);
first and second terminal electrodes disposed so as to extend from inside to outside of said sealant in parallel with each other, each terminal electrode having a second width (WTCP) and arranged at pitches smaller than those of the display electrodes parallelly to the display electrodes; and
first and second inclined electrodes for connecting each of the first and second display electrodes to each of the first and second terminal electrodes, the first inclined electrode having a third width (Wn−1) and the second inclined electrode having a fourth width (Wn), the first inclined electrode being adjacent to said second inclined electrode;
wherein a first set of the first terminal electrode, the first display electrode and the first inclined electrode has a relationship with a second set of the second terminal electrode, the second display electrode and the second inclined electrode in accordance with the following formula:
wherein
1) mn−1 is a length between a first middle point and a third middle point, the first middle point being between each crossing point of outlines of the first inclined electrode and the first terminal electrode at the terminal electrode side and the third middle point being between each crossing point of outlines of the first inclined electrode and the first display electrode at the display electrode side,
2) mn is a length between a second middle point and a fourth middle point, said second middle point being between each crossing point of outlines of the second inclined electrode and the second terminal electrode at the terminal electrode side and the fourth middle point being between each crossing point of outlines of the second inclined electrode and the second display electrode at the display electrode side,
3) Pn−1 is a length between the third middle point and a predetermined line which is parallel to an adjacent edge-line of the substrates in a perpendicular direction of the predetermined line,
4) Pn is a length between the fourth middle point and the predetermined line in a perpendicular direction of the predetermined line, and
5) e(n−1) is a length between the first middle point and the second middle point in a parallel direction of the outlines of the first and second inclined electrode.
0. 20. A liquid crystal display according to
0. 21. A liquid crystal display according to
0. 22. A liquid crystal display according to
0. 23. A liquid crystal display according to
0. 24. A liquid crystal display according to
0. 28. A liquid crystal display device according to claim 25, wherein out of the combinations, almost all combinations satisfy the condition.
0. 29. A liquid crystal display device according to claim 25, wherein at least two of the plurality of terminals constitute a group of terminals;
out of the combinations, a combination whose corresponding terminals are positioned at an approximately middle position in the group of terminals does not satisfy the condition.
0. 30. A liquid crystal display device according to claim 25, wherein the plurality of terminals constitute a plurality of groups of terminals each of which includes at least two of the plurality of terminals;
out of the combinations, a combination whose corresponding one terminal is included one of the plurality of groups of terminals and corresponding another terminal is included another of the plurality of groups of terminals does not satisfy the condition.
0. 31. A liquid crystal display device according to claim 30, wherein in the combination whose corresponding one terminal is included one of the plurality of groups of terminals and corresponding another terminal is included another of the plurality of groups of terminals, the corresponding one terminal is positioned at an outer edge of the one of the plurality of groups of terminals and the corresponding another terminal is positioned at an outer edge of the another of the plurality of groups of terminals.
0. 32. A liquid crystal display device according to claim 26, wherein out of the combinations, almost all combinations satisfy the condition.
0. 33. A liquid crystal display device according to claim 26, wherein at least two of the plurality of terminals constitute a group of terminals,
out of the combinations, a combination whose corresponding terminals are positioned at an approximately middle position in the group of terminals does not satisfy the condition.
0. 34. A liquid crystal display device according to claim 26, wherein the plurality of terminals constitute a plurality of groups of terminals each of which includes at least two of the plurality of terminals,
out of the combinations, a combination whose corresponding one terminal is included one of the plurality of groups of terminals and corresponding another terminal is included another of the plurality of groups of terminals does not satisfy the condition.
0. 35. A liquid crystal display device according to claim 34, wherein in the combination whose corresponding one terminal is included one of the plurality of groups of terminals and corresponding another terminal is included another of the plurality of groups of terminals, the corresponding one terminal is positioned at an outer edge of the one of the plurality of groups of terminals and the corresponding another terminal is positioned at an outer edge of the another of the plurality of groups of terminals.
0. 36. A liquid crystal display device according to claim 27, wherein out of the combinations, almost all combinations satisfy the condition.
0. 37. A liquid crystal display device according to claim 27, wherein at least two of the plurality of terminals constitute a group of terminals;
out of the combinations, a combination whose corresponding terminals are positioned at an approximately middle position in the group of terminals does not satisfy the condition.
0. 38. A liquid crystal display device according to claim 27, wherein the plurality of terminals constitute a plurality of groups of terminals each of which includes at least two of the plurality of terminals,
out of the combinations, a combination whose corresponding one terminal is included in one of the plurality of groups of terminals and a corresponding another terminal is included in another of the plurality of groups of terminals does not satisfy the condition.
0. 39. A liquid crystal display device according to claim 38, wherein in the combination whose corresponding one terminal is included in one of the plurality of groups of terminals and the corresponding another terminal is included in another of the plurality of groups of terminals, the corresponding one terminal is positioned at an outer edge of the one of the plurality of groups of terminals and the corresponding another terminal is positioned at an outer edge of the another of the plurality of groups of terminals.
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This FIG. 30 is a partial plan view of another embodiment showing leadout wirings on the electrode substrate applied to the liquid crystal display of this invention.As shown in FIG. 30, display electrodes 40-1 to 40-8 are formed on the surface of an electrode substrate and arranged in parallel to one another and terminal electrodes 41-1 to 41-8 which are in parallel to one another are arranged with different pitches from pitches of the display electrodes. As described above, when the invention is applied to the active matrix liquid crystal display, the display electrodes 40-1 to 40-8 are scanning signal lines (i.e., gate signal lines or horizontal signal lines) or video signal lines (i.e., drain signal lines or vertical signal lines) in the substrate where switching devices are installed. A plurality of leadout wirings are connected between the parallel display electrodes, scanning signal lines or video signal lines 40-1 to 40-8 and the parallel terminal electrodes 41-1 to 41-8. The leadout wirings include a first portion 40a-1 to 40a-8 which are substantially parallel to the members 40-1 to 40-8 representative of display electrodes, video signal lines or scanning signal lines, second portions 41a-1 to 41a-8 which are substantially parallel to the terminal electrodes 41-1 to 41-8, and inclined linear wiring electrodes 42-1 to 42-8 which connect the first portions 40a-1 to 40a-8 and the second portions 41a-1 to 41a-8. As shown in FIG. 30, at least substantial portions of at least a majority of the inclined linear wiring electrodes are substantially parallel to substantial portion of an adjacent one of the inclined linear wiring electrodes.
As described above, this invention can provide a liquid crystal display which has short and low-resistance leadout wirings whose area utilization factor is high. The liquid crystal display of this invention is also characterized in that the display section is free from uneven rubbing streaks, the frame edge portion is free from tonal variation and has a uniformly black unlit area, the gap between the upper and lower electrode substrates can be controlled precisely, and the liquid crystal display is free from color variation.
Because the area utilization factor (wiring efficiency) of the leadout wirings can be improved by forming the wirings as mentioned above, the lengths of the leadout wirings can be shortened, thus reducing the wiring resistance about 30-40% from conventional values of 500-1000Ω. The wiring resistance reduction can be contribute to the margin of the ON resistances of the drive semiconductor ICs and this in turn allows the dimension of the semiconductor IC chips to be reduced. Further, because the readout wirings can be shorter than conventional ones, it is possible to reduce the dimensions of the liquid crystal device. As a result, the manufacturing cost is reduced. Furthermore, reduction in the wiring resistance can reduce distortion of liquid crystal drive waveforms and crosstalk, which in turn reduces shadowing (uneven brightness), thereby improving the display quality.
Further, the first dummy electrodes are provided in a wide space between the terminal groups connected to TCPs arranged in line at the end portion of the electrode substrate. This arrangement prevents uneven pattern due to height difference between the areas where terminals exist and where they do not from being transferred to the rubbing roller, which performs alignment treatment (rubbing) of the molecular alignment layers formed over the display electrodes. This in turn prevents rubbing streaks from being formed on the molecular alignment layers and therefore the display quality from deteriorating. Furthermore, because the first dummy electrodes eliminate recesses between the TCPs, the gap between the upper and lower substrates can be made uniform.
The second dummy electrodes are provided in spaces between the terminals and this prevents light from leaking from between the terminals in the frame edge portion. Further, because the in-plane wiring densities of the area where the terminals are provided and the area where the extended terminals are provided are equal to each other, the gap between the upper and lower substrates is uniform. It is also possible to eliminate tonal variation due to uneven wiring density of the conventional, radially arranged inclined linear wirings at the frame edge portion, making the frame edge portion uniformly black, the frame edge portion being intended to be uniformly black. As a result, the display quality is enhanced.
Moreover, because the first and second dummy electrodes make the gap at the frame edge portion uniform, such problems as color variation caused by gap variation in the frame edge portion is eliminated, improving the display quality.
Madokoro, Hitomi, Fujii, Tatsuhisa, Katayama, Mitsugu, Ohira, Tomohide, Fumikura, Tatsuyuki
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| Jul 01 2003 | HITACHI DEVICE ENGINEERING CO , LTD | HITACHI ELECTRONIC DEVICES CO , LTD | DIVISION | 021194 | /0871 | |
| Jul 01 2003 | HITACHI ELECTRONIC DEVICES CO , LTD | Hitachi Displays, Ltd | MERGER SEE DOCUMENT FOR DETAILS | 021205 | /0016 | |
| Oct 31 2007 | Hitachi Displays, Ltd. | (assignment on the face of the patent) | / | |||
| Apr 28 2008 | Hitachi, LTD | Hitachi Displays, Ltd | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 021205 | /0273 | |
| Jun 30 2010 | Hitachi Displays, Ltd | IPS ALPHA SUPPORT CO , LTD | COMPANY SPLIT PLAN TRANSFERRING FIFTY 50 PERCENT SHARE IN PATENT APPLICATIONS | 027092 | /0684 | |
| Oct 01 2010 | IPS ALPHA SUPPORT CO , LTD | PANASONIC LIQUID CRYSTAL DISPLAY CO , LTD | MERGER SEE DOCUMENT FOR DETAILS | 027093 | /0937 |
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