US6524153B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing display device
Assignee: Canon Inc
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Filing: 2000-05-12
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Granted: 2003-02-25
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Expires: 2020-05-12
Abstract
Abstract An electrophoretic display device distributes an electrophoretic liquid mixture containing electrophoretic particles to respective pixels in substantially equal amounts, thereby obviating a display density fluctuation due to a difference in distributed amount of the electrophoretic particles at the respective pixels. The equal distribution is performed through a process including the use of a temporary adsorbing member carrying the electrophoretic particles in an electrostatically adsorbed form in a pattern corresponding to an arrangement pattern, followed by transfer of the electrophoretic particles to the respective pixels, or a process including distribution of a distribution liquid containing the electrophoretic particles to the respective pixels followed by a step of adding the dispersion liquid.
Inventors
- 👤 Tsutomu Ikeda
- 👤 Masahiro Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:05
CPC Classifications
C; C25; C25D; C25D13/00; C25D13/12; G; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G02F1/1675; G02F1/1679
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A process for producing a display device of the type comprising: a pair of substrates disposed opposite to each other with a prescribed gap therebetween, partitioning walls disposed to divide the gap so as to define a plurality of pixels arranged along an extension of the substrates, an electrophoretic mixture comprising a dispersion liquid and a multitude of charged electrophoretic particles distributed to each pixel, and a first electrode and a second electrode disposed at each pixel so as to face the electrophoretic mixture; said process comprising: forming the partitioning walls on one of the pair of substrates before the substrates are disposed with the prescribed gap therebetween to thereby define the plurality of pixels, and distributing a distribution liquid containing the electrophoretic particles dispersed therein to the respective pixels in substantially equal amounts through a nozzle while applying a voltage to at least one of the first and second electrodes.
Claim 2
Dependent Claim
151 words
A process for producing a display device of the type comprising: a pair of substrates disposed opposite to each other with a prescribed gap therebetween, partitioning walls disposed to divide the gap so as to define a plurality of pixels arranged along an extension of the substrates, an electrophoretic mixture comprising a dispersion liquid and a multitude of charged electrophoretic particles distributed to each pixel, and a first electrode and a second electrode disposed at each pixel so as to face the electrophoretic mixture; said process comprising: forming the partitioning walls on one of the pair of substrates before the substrates are disposed with the prescribed gap therebetween to thereby define the plurality of pixels, and distributing a distribution liquid containing the electrophoretic particles dispersed therein to the respective pixels in substantially equal amounts through a nozzle while applying a voltage to at least one of the first and second electrodes.
Claim 3
Dependent Claim
22 words
A process according to claim 1 , wherein the distribution liquid comprises a mixture of the dispersion liquid and the electrophoretic particles.
Claim 4
Dependent Claim
34 words
A process according to claim 2 , wherein an additional amount of the dispersion liquid is distributed to fill the respective pixels before the pair of substrates are disposed with the prescribed gap therebetween.
Claim 5
Dependent Claim
45 words
A process according to claim 3 , wherein the additional amount of the dispersion liquid is distributed to the respective pixels while applying a voltage to at least one of the first and second electrodes so as to electrostatically attract the electrophoretic particles distributed thereto.
Claim 6
Dependent Claim
24 words
A process according to claim 1 , wherein the distribution liquid comprises a mixture of a volatile liquid and the electrophoretic particles dispersed therein.
Claim 7
Dependent Claim
155 words
A process for producing a display device of the type comprising: a pair of substrates disposed opposite to each other with a prescribed gap therebetween, partitioning walls disposed to divide the gap so as to define a plurality of pixels arranged along an extension of the substrates, an electrophoretic mixture comprising a dispersion liquid and a multitude of charged electrophoretic particles distributed to each pixel, and a first electrode and a second electrode disposed at each pixel so as to face the electrophoretic mixture; said process comprising: forming the partitioning walls on one of the pair of substrates before the substrates are disposed with the prescribed gap therebetween to thereby define the plurality of pixels, distributing a mixture of a volatile liquid and the electrophoretic particles to the respective pixels in substantially equal amounts through a nozzle, evaporating the volatile liquid off the respective pixels, and distributing a dispersion liquid to fill the respective pixels.
Claim 8
Dependent Claim
155 words
A process for producing a display device of the type comprising: a pair of substrates disposed opposite to each other with a prescribed gap therebetween, partitioning walls disposed to divide the gap so as to define a plurality of pixels arranged along an extension of the substrates, an electrophoretic mixture comprising a dispersion liquid and a multitude of charged electrophoretic particles distributed to each pixel, and a first electrode and a second electrode disposed at each pixel so as to face the electrophoretic mixture; said process comprising: forming the partitioning walls on one of the pair of substrates before the substrates are disposed with the prescribed gap therebetween to thereby define the plurality of pixels, distributing a mixture of a volatile liquid and the electrophoretic particles to the respective pixels in substantially equal amounts through a nozzle, evaporating the volatile liquid off the respective pixels, and distributing a dispersion liquid to fill the respective pixels.
Claim 9
Dependent Claim
41 words
A process according to claim 6 , wherein the dispersion liquid is distributed to the respective pixels while applying a voltage to at least one of the first and second electrodes so as to electrostatically attract the electrophoretic particles distributed thereto.
References Cited (Backward Citations)
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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 |