Patent US6593944B1 successfully refreshed from Google Patents.
EP0458321A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process and apparatus for producing liquid crystal panel
Assignee: Canon Inc
•
Filing: 1991-05-22
•
Granted: —
•
Expires: 2011-05-22
Abstract
Abstract A liquid crystal contained in a liquid crystal reservoir is applied to an injection port of a blank liquid crystal panel in a vacuum chamber, and the vacuum chamber is restored to the atmospheric pressure to inject the applied liquid crystal into the liquid crystal panel through the injection port. Herein, the liquid crystal, particularly a ferroelectric liquid crystal having a high viscosity, is effectively used for filling the liquid crystal panel with a minimum loss by using a transfer member moving between the liquid crystal reservoir and the liquid crystal panel. <IMAGE>
Inventors
- 👤 Satoshi C/O Canon Kabushiki Kaisha Yoshihara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:46
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
97 words
A process for producing a liquid crystal panel comprising the steps of: placing a blank liquid crystal panel having an injection port and a liquid crystal reservoir containing a liquid crystal within a vacuum environment, causing a transfer member moving between the liquid crystal reservoir and the liquid crystal panel to carry a portion of the liquid crystal in the liquid crystal reservoir, applying the liquid crystal carried on the transfer member to the injection port of the liquid crystal panel, and placing the injection port of the liquid crystal panel within an environment of atmospheric pressure.
Claim 2
Dependent Claim
19 words
A process according to Claim 1, wherein the temperature of the transfer member is controlled at an elevated temperature.
Claim 3
Dependent Claim
24 words
A process according to Claim 1, wherein the temperature of the injection port of the liquid crystal panel is controlled at an elevated temperature.
Claim 4
Dependent Claim
24 words
A process according to Claim 1, wherein the temperature of the liquid crystal within the liquid crystal reservoir is controlled at an elevated temperature.
Claim 5
Dependent Claim
51 words
A process according to Claim 1, wherein the temperature T₁ of the liquid crystal within the liquid crystal reservoir, the temperature T₂ of the transfer member and the temperature T₃ of the injection port of the liquid crystal panel are controlled to satisfy a relationship of T₁ ≧ T₃ ≧ T₂.
Claim 6
Dependent Claim
42 words
A process according to Claim 5, wherein the temperatures are controlled to satisfy a relationship of T₁ ≧ T₃ ≧ T₄ ≧ T₂, wherein T₄ denotes a temperature providing a higher temperature phase than a chiral smectic phase of the liquid crystal.
Claim 7
Dependent Claim
58 words
A process according to Claim 1, wherein the liquid crystal panel is formed to have a face having a length L₁ and including the injection port having a length L₃, and the transfer member is formed to have a face for applying the liquid crystal having a length L₃ satisfying a relationship of: L₃ ≧ L₂ ≧ L₁.
Claim 8
Dependent Claim
19 words
A process according to Claim 1, wherein the transfer member has a concave part for carrying the liquid crystal.
Claim 9
Dependent Claim
98 words
A process for producing a liquid crystal panel comprising: applying a liquid crystal contained in a liquid crystal reservoir to an injection port of a blank liquid crystal panel in a vacuum space and then restoring the pressure of the vacuum space to an atmospheric pressure to inject the liquid crystal into the liquid crystal panel; wherein a transfer member moving between the liquid crystal reservoir and the liquid crystal panel is used to carry the liquid crystal within the liquid crystal reservoir and then apply the liquid crystal to the injection port of the liquid crystal panel.
Claim 10
Dependent Claim
19 words
A process according to Claim 9, wherein the temperature of the transfer member is controlled at an elevated temperature.
Claim 11
Dependent Claim
24 words
A process according to Claim 9, wherein the temperature of the injection port of the liquid crystal panel is controlled at an elevated temperature.
Claim 12
Dependent Claim
24 words
A process according to Claim 9, wherein the temperature of the liquid crystal within the liquid crystal reservoir is controlled at an elevated temperature.
Claim 13
Dependent Claim
51 words
A process according to Claim 9, wherein the temperature T₁ of the liquid crystal within the liquid crystal reservoir, the temperature T₂ of the transfer member and the temperature T₃ of the injection port of the liquid crystal panel are controlled to satisfy a relationship of T₁ ≧ T₃ ≧ T₂.
Claim 14
Dependent Claim
42 words
A process according to Claim 13, wherein the temperatures are controlled to satisfy a relationship of T₁ ≧ T₃ ≧ T₄ ≧ T₂, wherein T₄ denotes a temperature providing a higher temperature phase than a chiral smectic phase of the liquid crystal.
Claim 15
Dependent Claim
58 words
A process according to Claim 9, wherein the liquid crystal panel is formed to have a face having a length L₁ and including the injection port having a length L₃, and the transfer member is formed to have a face for applying the liquid crystal having a length L₃ satisfying a relationship of: L₃ ≧ L₂ ≧ L₁.
Claim 16
Dependent Claim
19 words
A process according to Claim 9, wherein the transfer member has a concave part for carrying the liquid crystal.
Claim 17
Independent Claim
56 words
An apparatus for producing a liquid crystal panel, comprising: a liquid crystal panel having an injection port, a liquid crystal reservoir containing a liquid crystal, and a transfer member for carrying a portion of the liquid crystal contained in the liquid crystal reservoir and applying the portion to the injection port of the liquid crystal panel.
Claim 18
Dependent Claim
17 words
An apparatus according to Claim 17, further comprising means for controlling the temperature of the transfer member.
Claim 19
Dependent Claim
17 words
An apparatus according to Claim 17, further comprising means for controlling the temperature of the injection port.
Claim 20
Dependent Claim
19 words
An apparatus according to Claim 17, further comprising means for controlling the liquid crystal within the liquid crystal reservoir.
Claim 21
Dependent Claim
55 words
An apparatus according to Claim 17, further comprising means for controlling the temperature T₁ of the liquid crystal within the liquid crystal reservoir, the temperature T₂ of the transfer member and the temperature T₃ of the injection port of the liquid crystal panel so as to satisfy a relationship of T₁ ≧ T₃ ≧ T₂.
Claim 22
Dependent Claim
42 words
An apparatus according to Claim 21, wherein the temperatures are controlled to satisfy a relationship of T₁ ≧ T₃ ≧ T₄ ≧ T₂, wherein T₄ denotes a temperature providing a higher temperature phase than a chiral smectic phase of the liquid crystal.
Claim 23
Dependent Claim
58 words
An apparatus according to Claim 17, wherein the liquid crystal panel is formed to have a face having a length L₁ and including the injection port having a length L₃, and the transfer member is formed to have a face for applying the liquid crystal having a length L₃ satisfying a relationship of: L₃ ≧ L₂ ≧ L₁.
Claim 24
Dependent Claim
19 words
An apparatus according to Claim 17, wherein the transfer member has a concave part for carrying the liquid crystal.
Claim 25
Independent Claim
116 words
An apparatus for producing a liquid crystal panel, comprising: a vacuum chamber, and a liquid crystal panel having an injection port and a liquid crystal reservoir containing a liquid crystal disposed within the vacuum chamber so that a portion of the liquid crystal contained in the liquid crystal reservoir is applied to the injection port of the liquid crystal port and then the vacuum chamber is restored to atmospheric pressure, wherein the apparatus further comprises a transfer member moving between the liquid crystal reservoir and the liquid crystal panel to carry the portion of the liquid crystal within the liquid crystal reservoir and then apply the portion to the injection port of the liquid crystal panel.
Claim 26
Dependent Claim
58 words
An apparatus according to Claim 25, wherein the liquid crystal panel is formed to have a face having a length L₁ and including the injection port having a length L₃, and the transfer member is formed to have a face for applying the liquid crystal having a length L₃ satisfying a relationship of: L₃ ≧ L₂ ≧ L₁.
Claim 27
Dependent Claim
19 words
A process according to Claim 25, wherein the transfer member has a concave part for carrying the liquid crystal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.