Patent EP0542307A2 successfully refreshed from Google Patents.
EP0542307A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image display device and a method of driving the same
Assignee: AGC Inc
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Filing: 1992-11-13
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Granted: —
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Expires: 2012-11-13
Abstract
Abstract An image display device having an electro-optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving the electro - optical medium by selectively applying a voltage on the matrix electrode and a reference voltage generator for supplying the driving means with a predetermined driving voltage, characterized by that a noise compensating means is interposed between the driving means and the reference voltage generator, the noise compensating means detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position, forming a noise compensating voltage having a first polarity reverse to a second polarity of the noise by using the noise, and supplying the noise compensating voltage to the driving means.
Inventors
- 👤 Takeshi Ag Technology Co. Ltd. Kuwata
- 👤 Kohji Ag Technology Co. Ltd. Ikawa
- 👤 Tatsushi Asahi Glass Company Ltd. Asakawa
- 👤 Hiroshi Asahi Glass Company Ltd. Hasebe
- 👤 Akira Ag Technology Co. Ltd. Nakazawa
- 👤 Hideyuki Asahi Glass Company Ltd. Nagano
- 👤 Takanori Ag Technology Co. Ltd. Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3696; G09G2300/00; G09G2300/04; G09G2300/0421; G09G2300/043; G09G2320/00; G09G2320/02; G09G2320/0209; G09G2330/00; G09G2330/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
An image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, characterized by that a noise compensating means is interposed between the driving means and said reference voltage generator, said noise compensating means detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position, forming a noise compensating voltage having a first polarity reverse to a second polarity of said noise by using the noise, and supplying said noise compensating voltage to the driving means.
Claim 2
Dependent Claim
132 words
An image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, characterized by that a noise compensating means is interposed between the driving means and said reference voltage generator, said noise compensating means detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position, forming a noise compensating voltage having a first polarity reverse to a second polarity of said noise by using the noise, and supplying said noise compensating voltage to the driving means.
Claim 3
Dependent Claim
26 words
The image display device according to Claim 1, wherein the noise detecting position is at an input portion of the driving means for supplying the voltage.
Claim 4
Dependent Claim
29 words
The image display device according to Claim 1, wherein a dummy electrode is provided on the electrode substrate and the noise detecting position is provided at said dummy electrode.
Claim 5
Dependent Claim
133 words
The image display device according to Claim 1, wherein the noise compensating means is provided with an integrator, a change - over switch and an ON - OFF switch, an output terminal of said change-over switch being connected to an input terminal of the driving means, a first one A of input terminals of the change-over switch being connected to an output terminal of the reference voltage generator, a second one B of the input terminals of the change-over switch being connected to an output terminal of the integrator, a first input terminal of the integrator being connected to the predetermined noise detecting position through the ON - OFF switch, a second input terminal of the integrator being supplied with the reference voltage generated by the reference voltage generator as an offset voltage.
Claim 6
Dependent Claim
60 words
The image display device according to Claim 1, wherein the driving means is supplied with an output of the reference voltage generator and a noise compensating voltage which is obtained by amplifying a difference between an input voltage at an input terminal of the driving means for a supply voltage and the reference voltage and by performing a negative feedback.
Claim 7
Dependent Claim
105 words
The image display device according to Claim 1, wherein the noise compensating means is composed of a first differential amplifying means and a second differential amplifying means, a positive input terminal of said first differential amplifying means being inputted with an output of the reference voltage generator, an output terminal thereof being connected to an input terminal of the driving means for a supply voltage, a negative input terminal thereof being inputted with an output of said second differential amplifying means whereby a difference between the reference voltage and a voltage at the input terminal of the driving means for the supply voltage is amplified.
Claim 8
Dependent Claim
98 words
The image display device according to Claim 1, wherein the noise compensating means is composed of a delay means, an inverting amplifier and a change-over switch, an output terminal of said change-over switch being connected to an input terminal of the driving means, a first one A of input switching terminals of said change-over switch being connected to an output terminal of the reference voltage generator, a second one B of the input switching terminals of the change-over switch being connected to the output terminal of the reference voltage generator through said delay means and said inverting amplifier.
Claim 9
Dependent Claim
179 words
An image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, characterized by that a noise compensating means interposed between the driving means and said reference voltage generator comprising: a noise compensating voltage supplying means for detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position, forming a noise compensating voltage having a first polarity reverse to a second polarity of said noise by using the noise and supplying said noise compensating voltage to the driving means; and a switching means for switching an output of said noise compensating voltage supplying means to either one of a first state wherein said output is supplied to the electro - optical medium and a second state wherein the output is not supplied thereto.
Claim 10
Dependent Claim
179 words
An image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, characterized by that a noise compensating means interposed between the driving means and said reference voltage generator comprising: a noise compensating voltage supplying means for detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position, forming a noise compensating voltage having a first polarity reverse to a second polarity of said noise by using the noise and supplying said noise compensating voltage to the driving means; and a switching means for switching an output of said noise compensating voltage supplying means to either one of a first state wherein said output is supplied to the electro - optical medium and a second state wherein the output is not supplied thereto.
Claim 11
Independent Claim
126 words
A method of driving an image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, comprising the steps of; detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position; receiving said noise and transforming the noise into a noise compensating voltage corresponding to the noise and having a first polarity reverse to a second polarity of the noise; and supplying said driving means with said noise compensating voltage.
Claim 12
Independent Claim
126 words
A method of driving an image display device having an electro - optical medium interposed between a pair of electrode substrates composing a matrix electrode, a driving means for driving said electro - optical medium by selectively applying a voltage on said matrix electrode and a reference voltage generator for supplying said driving means with a predetermined driving voltage, comprising the steps of; detecting a noise in a voltage supplied from the reference voltage generator to the electro - optical medium at a predetermined noise detecting position; receiving said noise and transforming the noise into a noise compensating voltage corresponding to the noise and having a first polarity reverse to a second polarity of the noise; and supplying said driving means with said noise compensating voltage.
References Cited (Backward Citations)
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