US6525865B2
Expired / Lapsed
US
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Electrophoretic display and method for producing same
Assignee: E Ink Corp
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Filing: 2001-05-29
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Granted: 2003-02-25
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Expires: 2021-05-29
Abstract
Abstract A method for producing an electrophoretic display panel is provided. In the first process, elements including TFTs are formed on an element substrate, thereby pixel electrodes being produced thereon. In the second process, a bulkhead is placed on the element substrate. In the third process, an ink jet type of dispersion charging apparatus is used to charge the dispersion into divided cells partitioned by the bulkhead. In the fourth process, an upper opening of the bulkhead is sealed with a sealer. And in the fifth process, an opposing substrate on which a common electrode is formed is applied to the sealer in a manner that the common electrode faces the pixel electrodes.
Inventors
- 👤 Makoto Katase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G02F1/1675; G02F1/1679; G02F1/13; G02F1/133; G02F1/1333; G02F1/133377; G02F1/1341
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
55 words
A method for producing an electrophoretic display, the method comprising: providing a bulkhead on a substrate so as to partition a space on the substrate into a plurality of divided cells; and ejecting a dispersion containing electrophoretic particles toward an opening of the bulkhead as a droplet, to charge the divided cells with the dispersion.
Claim 2
Independent Claim
55 words
A method for producing an electrophoretic display, the method comprising: providing a bulkhead on a substrate so as to partition a space on the substrate into a plurality of divided cells; and ejecting a dispersion containing electrophoretic particles toward an opening of the bulkhead as a droplet, to charge the divided cells with the dispersion.
Claim 3
Independent Claim
74 words
A method for producing an electrophoretic display, the method comprising: providing a bulkhead on a first substrate so as to partition a space on the substrate into a plurality of divided cells; ejecting a dispersion containing electrophoretic particles toward an opening of the bulkhead as a droplet, to charge the divided cells with the dispersion; sealing the opening of the bulkhead with a sealer; and applying a second substrate to the sealed first substrate.
Claim 4
Independent Claim
74 words
A method for producing an electrophoretic display, the method comprising: providing a bulkhead on a first substrate so as to partition a space on the substrate into a plurality of divided cells; ejecting a dispersion containing electrophoretic particles toward an opening of the bulkhead as a droplet, to charge the divided cells with the dispersion; sealing the opening of the bulkhead with a sealer; and applying a second substrate to the sealed first substrate.
Claim 5
Dependent Claim
83 words
A method of claim 2 , further comprising processes of forming, on one of surfaces of the first substrate, a plurality of data lines, a plurality of scanning lines, a plurality of switching elements each placed according to each of intersections made between the scanning lines and the data lines, and a plurality of pixel electrodes each electrically connected with each switching element, the processes being carried out before the bulkhead is formed on the one of the surfaces of the first substrate.
Claim 6
Dependent Claim
40 words
A method of claim 3 , wherein the second substrate is transparent, and the method further comprises a process of forming a transparent common electrode onto the second substrate before the second substrate is applied to the sealed first substrate.
Claim 7
Dependent Claim
31 words
A method of claim 3 , wherein conductivity is partly or entirely given to the bulkhead, of which conductive part is used as a common electrode paired with the pixel electrodes.
Claim 8
Dependent Claim
22 words
A method of claim 3 , wherein the sealer has conductivity and is used as a common electrode paired with pixel electrodes.
Claim 9
Dependent Claim
38 words
A method of claim 3 , wherein the sealing process includes a process of sealing the opening of the bulkhead using a non-conductive sealer employed as the sealer, and a process of giving conductivity to the non-conductive sealer.
Claim 10
Dependent Claim
77 words
A method of claim 2 , further comprising: forming either one of a plurality of row electrodes or a plurality of column electrodes on one of surfaces of the first substrate before the bulkhead is formed onto the one of the surfaces of the first substrate; and forming the other of the plurality of row electrodes and the plurality of column electrodes on the second substrate before the second substrate is applied to the sealed first substrate.
Claim 11
Dependent Claim
30 words
A method of claim 2 , wherein, in the ejecting process, a material of the bulkhead is ejected toward the first substrate as the droplet, thereby the bulkhead being formed.
Claim 12
Dependent Claim
24 words
A method of claim 2 , further comprising the process of forming the bulkhead by pressing a material of the bulkhead with a stamper.
Claim 13
Dependent Claim
78 words
A method of claim 10 , wherein a plurality of data lines, a plurality of scanning lines, a plurality of switching elements each placed according to each of intersections made between the scanning lines and the data lines, and a plurality of pixel electrodes each electrically connected with each switching element are previously formed on the second substrate, and the bulkhead forming process includes a process of applying the bulkhead formed by the stamper to the first substrate.
Claim 14
Dependent Claim
35 words
A method of claim 11 , wherein the first substrate is transparent, and the method further comprises a process of previously forming on the first substrate a transparent common electrode paired with the pixel electrode.
Claim 15
Dependent Claim
31 words
A method of claim 11 , wherein conductivity is partly or entirely given to the bulkhead, of which conductive part is used as a common electrode paired with the pixel electrodes.
Claim 16
Dependent Claim
93 words
A method of claim 11 , wherein a material of the bulkhead is a sheet-like conductive member covered by a resin member, further the bulkhead forming process comprising processes of: pressing the material of the bulkhead with the stamper so that the divided cells are formed on one of surfaces of the conductive member, thereby the bulkhead being produced; and applying the bulkhead to the first substrate so as to form the bulkhead on the first substrate, in which the conductive member is used as a common electrode paired with the pixel electrodes.
Claim 17
Dependent Claim
114 words
A method of claim 10 , wherein a plurality of data lines, a plurality of scanning lines, a plurality of switching elements each placed according to each of intersections made between the scanning lines and the data lines, and a plurality of pixel electrodes each electrically connected with each switching element are previously formed on the second substrate, and the bulkhead forming process includes processes of: coating the bulkhead formed by the stamper partly or entirely with a conductive material to form a coated bulkhead having a common electrode paired with the pixel electrodes; and applying the coated bulkhead to the first substrate so as to make the first substrate having the coated bulkhead.
Claim 18
Dependent Claim
19 words
A method of claim 2 , wherein the bulkhead is partly or entirely arranged at a boundary of pixels.
Claim 19
Dependent Claim
18 words
A method of claim 2 , wherein the bulkhead is formed with a bulkhead material which is black.
Claim 20
Dependent Claim
46 words
A method of claim 2 , wherein the sealer is made of material to be fluidized by heating, wherein the sealing process includes processes of: disposing the sealer at the opening of the bulkhead; and sealing the opening of the bulkhead by heating the disposed sealer.
Claim 21
Dependent Claim
53 words
A method of claim 2 , wherein the sealer is made of material not to be mixed with the dispersion, wherein the sealing process includes processes of: coating or spraying the sealer on the first substrate in which the dispersion is charged; and sealing the opening of the bulkhead by hardening the sealer.
Claim 22
Dependent Claim
98 words
A method of claim 2 , wherein the sealer is made of material greater in relative gravity than the dispersion and not to be mixed with the dispersion, the ejecting process includes a process of ejecting, toward each of the divided cells, the dispersion to which the sealer is added, thereby both of the dispersion and the sealer being charged into the cells, and the sealing process includes a process of sealing the opening of the bulkhead by hardening the sealer after the dispersion and the sealer are separated from each other in each of the divided cells.
Claim 23
Dependent Claim
79 words
A method of claim 2 , further comprising a process of making a porous sheet having a plurality of pores adhere to the first substrate on which the bulkhead is formed, wherein the ejecting process includes a process of ejecting the dispersion, as the droplet, through the pores toward the first substrate to which the porous sheet adheres, and the sealing process includes a process of sealing the pores by ejecting the sealer as a droplet toward each pore.
Claim 24
Dependent Claim
72 words
An electrophoretic display for performing a desired display by changing a spatial state of electrophoretic particles pixel by pixel, comprising: a bulkhead partitioned into a plurality of divided cells and disposed partly or entirely at a boundary of the pixels; a dispersion containing the electrophoretic particles to be charged into each of the plurality of divided cells; and a pair of electrodes fixedly sandwiching the dispersion, at least one electrode being transparent.
Claim 25
Dependent Claim
72 words
An electrophoretic display for performing a desired display by changing a spatial state of electrophoretic particles pixel by pixel, comprising: a bulkhead partitioned into a plurality of divided cells and disposed partly or entirely at a boundary of the pixels; a dispersion containing the electrophoretic particles to be charged into each of the plurality of divided cells; and a pair of electrodes fixedly sandwiching the dispersion, at least one electrode being transparent.
Claim 26
Dependent Claim
50 words
An electrophoretic display of claim 22 , in which the display is made on a plurality of different hues each assigned to each pixel in accordance with a predetermined rule, wherein the bulkhead is disposed at least at a boundary of pixels whose display hues are different from each other.
Claim 27
Dependent Claim
12 words
An electrophoretic display of claim 23 , wherein the bulkhead is black.
Claim 28
Dependent Claim
15 words
An electrophoretic display of claim 22 , comprising a sealer for sealing the charged dispersion.
Claim 29
Dependent Claim
24 words
An electrophoretic display of claim 25 , wherein the sealer has conductivity and consists of the one electrode used in common with the sealer.
Claim 30
Dependent Claim
31 words
An electrophoretic display of claim 22 , wherein the bulkhead has conductivity in partly or entirely, part of the bulkhead, which has conductivity, being used in common with the one electrode.
Claim 31
Dependent Claim
95 words
An electrophoretic display of claim 22 , further comprising a first substrate on which a plurality of data lines, a plurality of scanning lines, a plurality of switching elements each disposed correspondingly to an intersection made between each scanning line and each data line, and a plurality of pixel electrodes each electrically connected with each switching element, and a second substrate on which a common electrode is formed, wherein the bulkhead is fixedly sandwiched between the first and second substrates, the one electrode being the common electrode and the other electrode being the pixel electrodes.
Claim 32
Dependent Claim
46 words
An electrophoretic display of claim 22 , further comprising a first substrate on which a plurality of first electrodes are placed and a second substrate on which a plurality of second electrodes are placed, wherein the bulkhead is fixedly sandwiched between the first and second substrates.
Claim 33
Dependent Claim
79 words
An electric device provided with a electrophoretic display for performing a desired display by changing a spatial state of electrophoretic particles pixel by pixel, the electrophoretic display comprising: a bulkhead partitioned into a plurality of divided cells and disposed partly or entirely at a boundary of the pixels; dispersion containing the electrophoretic particles to be charged into each of the plurality of divided cells; and a pair of electrodes fixedly sandwiching the dispersion, at least one electrode being transparent.
Claim 34
Dependent Claim
79 words
An electric device provided with a electrophoretic display for performing a desired display by changing a spatial state of electrophoretic particles pixel by pixel, the electrophoretic display comprising: a bulkhead partitioned into a plurality of divided cells and disposed partly or entirely at a boundary of the pixels; dispersion containing the electrophoretic particles to be charged into each of the plurality of divided cells; and a pair of electrodes fixedly sandwiching the dispersion, at least one electrode being transparent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-02-24 | 2006-08-26 | 2007-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-24 | 2010-08-26 | 2011-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-24 | 2014-08-26 | 2015-02-25 | $7700.00 | Window Closed / Lapsed |