US5144464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer liquid crystal device
Assignee: Canon Inc
•
Filing: 1992-02-04
•
Granted: 1992-09-01
•
Expires: 2012-02-04
Abstract
Abstract A polymer liquid crystal device is formed by a color polymer liquid crystal layer, generally disposed on a substrate. The color polymer liquid crystal layer includes a plurality of minute polymer liquid crystal elements, which in turn comprise plural species of color polymer liquid crystals colored in at least two colors and disposed regularly or irregularly in the layer so that the polymer liquid crystal elements emit scattered light in intensities which are selectively controlled thermally to effect a display with scattered light. In the color polymer liquid crystal layer, a color of the polymer liquid crystal elements emitting the longest wavelength scattered light are disposed in a larger areal proportion than the other color of the polymer liquid crystal elements so as to correct color balance in compensation for a difference in spectral luminous efficiency or differences in scattering intensity and scattering angle depending on colors during a display using scattered light.
Inventors
- 👤 Toshikazu Ohnishi
- 👤 Shuzo Kaneko
- 👤 Takashi Kai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/132; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3857; G02F1/133; G02F1/1333; G02F1/133365
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
162 words
A polymer liquid crystal device, comprising: a color polymer liquid crystal layer comprising a plurality of minute polymer liquid crystal elements, said polymer liquid crystal elements comprising plural species of polymer liquid crystals colored in at least two colors and disposed in a prescribed planar pattern wherein said different colors of polymer liquid crystal elements comprise said different species of polymer liquid crystals, whereby the polymer liquid crystal elements scatter or transmit light incident thereto in intensities depending on selectively and thermally controllable states of the polymer liquid crystal elements to effect a display in which different colors of polymer liquid crystal elements scatter or transmit different wavelengths of light including light of a longest wavelength and light of a shorter wavelength; wherein a color of the polymer liquid crystal elements scattering or transmitting the longest wavelength light are disposed in a larger areal proportion than the other color of the polymer liquid crystal elements scattering or transmitting the shorter wavelength light.
Claim 2
Dependent Claim
162 words
A polymer liquid crystal device, comprising: a color polymer liquid crystal layer comprising a plurality of minute polymer liquid crystal elements, said polymer liquid crystal elements comprising plural species of polymer liquid crystals colored in at least two colors and disposed in a prescribed planar pattern wherein said different colors of polymer liquid crystal elements comprise said different species of polymer liquid crystals, whereby the polymer liquid crystal elements scatter or transmit light incident thereto in intensities depending on selectively and thermally controllable states of the polymer liquid crystal elements to effect a display in which different colors of polymer liquid crystal elements scatter or transmit different wavelengths of light including light of a longest wavelength and light of a shorter wavelength; wherein a color of the polymer liquid crystal elements scattering or transmitting the longest wavelength light are disposed in a larger areal proportion than the other color of the polymer liquid crystal elements scattering or transmitting the shorter wavelength light.
Claim 3
Dependent Claim
18 words
A device according to claim 1, wherein said color polymer liquid crystal layer is disposed on a substrate.
Claim 4
Dependent Claim
49 words
A device according to claim 2, wherein said polymer liquid crystal elements comprise three species of polymer liquid crystals colored in blue, green and red, respectively, and the red polymer liquid crystal elements are disposed in a larger areal proportion than the green and blue polymer liquid crystal elements.
Claim 5
Dependent Claim
27 words
A device according to claim 3, wherein the green polymer liquid crystal elements are disposed in a smaller areal proportion than the blue polymer liquid crystal elements.
Claim 6
Dependent Claim
25 words
A device according to claim 2, wherein the color polymer liquid crystals respectively comprise a polymer liquid crystal and a dye or pigment added thereto.
Claim 7
Dependent Claim
27 words
A device according to claim 5, wherein said dye or pigment is added in a proportion of 0.01-30 wt. % with respect to the polymer liquid crystal.
Claim 8
Dependent Claim
27 words
A device according to claim 5, wherein said dye or pigment is added in a proportion of 0.1-20 wt. % with respect to the polymer liquid crystal.
Claim 9
Dependent Claim
27 words
A device according to claim 5, wherein said dye or pigment is added in a proportion of 0.1-10 wt. % with respect to the polymer liquid crystal.
Claim 10
Independent Claim
27 words
A device according to any of claims 5-7, wherein the dyes or pigments are contained in substantially the same proportion in the respective color polymer liquid crystals.
Claim 11
Dependent Claim
27 words
A device according to claim 9, wherein the proportions of the dyes or pigments in the respective color polymer liquid crystals are within ±5% from each other.
Claim 12
Dependent Claim
49 words
A device according to claim 1, wherein said polymer liquid crystal elements comprise three species of polymer liquid crystals colored in blue, green and red, respectively, and the red polymer liquid crystal elements are disposed in a larger areal proportion than the green and blue polymer liquid crystal elements.
Claim 13
Dependent Claim
27 words
A device according to claim 11, wherein the green polymer liquid crystal elements are disposed in a smaller areal proportion than the blue polymer liquid crystal elements.
Claim 14
Dependent Claim
25 words
A device according to claim 1, wherein the color polymer liquid crystals respectively comprise a polymer liquid crystal and a dye or pigment added thereto.
Claim 15
Dependent Claim
27 words
A device according to claim 13, wherein said dye or pigment is added in a proportion of 0.01-30 wt. % with respect to the polymer liquid crystal.
Claim 16
Dependent Claim
27 words
A device according to claim 13, wherein said dye or pigment is added in a proportion of 0.1-20 wt. % with respect to the polymer liquid crystal.
Claim 17
Dependent Claim
27 words
A device according to claim 13, wherein said dye or pigment is added in a proportion of 0.1-10 wt. % with respect to the polymer liquid crystal.
Claim 18
Independent Claim
27 words
A device according to any of claims 13-16, wherein the dyes or pigments are contained in substantially the same proportion in the respective color polymer liquid crystals.
Claim 19
Dependent Claim
27 words
A device according to claim 17, wherein the proportions of the dyes or pigments in the respective color polymer liquid crystals are within ±5% from each other.
Claim 20
Dependent Claim
177 words
A display apparatus, comprising: a polymer liquid crystal device comprising a color polymer liquid crystal layer comprising a plurality of minute polymer liquid elements, said polymer liquid crystal elements comprising plural species of polymer liquid crystals colored in at least two colors and disposed in a prescribed planar pattern, wherein said different colors of polymer liquid crystal elements comprise said different species of polymer liquid crystals, whereby the polymer liquid crystal elements scatter or transmit light incident thereto in intensities depending on selectively and thermally controllable states of the polymer liquid crystal elements to effect a display in which different colors of polymer liquid crystal elements scatter or transmit different wavelengths of light including light of a longest wavelength and light of a shorter wavelength; wherein a color of the polymer liquid crystal elements scattering or transmitting the longest wavelength light are disposed in a larger areal proportion than the other color of the polymer liquid crystal elements scattering or transmitting the shorter wavelength light, said display apparatus further comprising: a light source; and a heat-application means.
Claim 21
Dependent Claim
177 words
A display apparatus, comprising: a polymer liquid crystal device comprising a color polymer liquid crystal layer comprising a plurality of minute polymer liquid elements, said polymer liquid crystal elements comprising plural species of polymer liquid crystals colored in at least two colors and disposed in a prescribed planar pattern, wherein said different colors of polymer liquid crystal elements comprise said different species of polymer liquid crystals, whereby the polymer liquid crystal elements scatter or transmit light incident thereto in intensities depending on selectively and thermally controllable states of the polymer liquid crystal elements to effect a display in which different colors of polymer liquid crystal elements scatter or transmit different wavelengths of light including light of a longest wavelength and light of a shorter wavelength; wherein a color of the polymer liquid crystal elements scattering or transmitting the longest wavelength light are disposed in a larger areal proportion than the other color of the polymer liquid crystal elements scattering or transmitting the shorter wavelength light, said display apparatus further comprising: a light source; and a heat-application means.
Claim 22
Dependent Claim
23 words
An apparatus according to claim 19, wherein said polymer liquid crystal device comprises the color polymer liquid crystal layer disposed on a substrate.
Claim 23
Dependent Claim
18 words
An apparatus according to claim 20, wherein said heat-application means includes a writing means and an erasure means.
Claim 24
Dependent Claim
14 words
An apparatus according to claim 21, wherein said writing means comprises a thermal head.
Claim 25
Dependent Claim
18 words
An apparatus according to claim 21, wherein said erasure means comprises an erasure heater and a temperature sensor.
References Cited (Backward Citations)
US4196974A
Cited
US4293435A
Cited
JPS5713428A
Cited
US4631328A
Cited
US4702558A
Cited
US4702945A
Cited
US4904066A
Cited
US4965591A
Cited
US5059000A
Cited
EP0321982A2
Cited
US5038166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |