EP0314084A2
Expired / Lapsed
EP
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Driving apparatus
Assignee: Canon Inc
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Filing: 1988-10-25
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Granted: —
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Expires: 2008-10-25
Abstract
Abstract A driving apparatus comprises a driving unit and a drive voltage generating unit. The driving unit includes a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes. The drive voltage generating unit includes a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage. The first and second voltages are preferably controlled so as to vary depending on an external temperature.
Inventors
- 👤 Hideo Kanno
- 👤 Hiroshi Inoue
- 👤 Atsushi Mizutome
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 15:57
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/3696; G09G2320/00; G09G2320/04; G09G2320/041
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
100 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, and b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage.
Claim 2
Dependent Claim
100 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, and b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage.
Claim 3
Dependent Claim
33 words
An apparatus according to Claim 1, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the first voltage and the second voltage, respectively.
Claim 4
Dependent Claim
16 words
An apparatus according to Claim 2, wherein said offset voltage is equal to the fixed voltage.
Claim 5
Dependent Claim
22 words
An apparatus according to Claim 1, wherein said third means includes means for generating division voltages between the first and second voltages.
Claim 6
Dependent Claim
36 words
An apparatus according to Claim 1, wherein said third means includes a plurality of resistors arranged in series between the output stage for generating the first voltage and the output stage for generating the second voltage.
Claim 7
Dependent Claim
34 words
An apparatus according to Claim 1, wherein said fixed voltage is a voltage set to an intermediate value between the maximum output voltage and the minimum output voltage of the drive voltage generating unit.
Claim 8
Dependent Claim
30 words
An apparatus according to Claim 1, wherein said fixed voltage is a mid voltage between the maximum output voltage and the minimum output voltage of the drive voltage generating unit.
Claim 9
Dependent Claim
127 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the first and second voltages will be prescribed voltages varying depending on an external temperature.
Claim 10
Dependent Claim
127 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the first and second voltages will be prescribed voltages varying depending on an external temperature.
Claim 11
Dependent Claim
33 words
An apparatus according to Claim 8, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the first voltage and the second voltage, respectively.
Claim 12
Dependent Claim
16 words
An apparatus according to Claim 9, wherein said offset voltage is equal to the fixed voltage.
Claim 13
Dependent Claim
22 words
An apparatus according to Claim 8, wherein said third means includes means for generating division voltages between the first and second voltages.
Claim 14
Dependent Claim
36 words
An apparatus according to Claim 8, wherein said third means includes a plurality of resistors arranged in series between the output stage for generating the first voltage and the output stage for generating the second voltage.
Claim 15
Dependent Claim
124 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage, and c) control means for controlling said second means so that said source voltage will be a prescribed voltage varying depending on an external temperature.
Claim 16
Dependent Claim
124 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for generating a fixed voltage, a second means for generating a source voltage for providing drive voltages for driving the electrode matrix, and a third means for generating a first voltage equal to a subtraction of the fixed voltage from the source voltage and a second voltage equal to a subtraction of the source voltage from the fixed voltage, and c) control means for controlling said second means so that said source voltage will be a prescribed voltage varying depending on an external temperature.
Claim 17
Dependent Claim
33 words
An apparatus according to Claim 13, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the first voltage and the second voltage, respectively.
Claim 18
Dependent Claim
16 words
An apparatus according to Claim 14, wherein said offset voltage is equal to the fixed voltage.
Claim 19
Dependent Claim
22 words
An apparatus according to Claim 13, wherein said third means includes means for generating division voltages between the first and second voltages.
Claim 20
Dependent Claim
36 words
An apparatus according to Claim 13, wherein said third means includes a plurality of resistors arranged in series between the output stage for generating the first voltage and the output stage for generating the second voltage.
Claim 21
Dependent Claim
98 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, and b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage.
Claim 22
Dependent Claim
98 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, and b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage.
Claim 23
Dependent Claim
31 words
An apparatus according to Claim 18, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the voltage obtained by the subtraction.
Claim 24
Dependent Claim
47 words
An apparatus according to Claim 18, which includes a control means; said first means including a plurality of voltage holding means, and the control means controlling the plurality of holding means so that they will respectively hold one of the plurality of voltages which are serially supplied.
Claim 25
Dependent Claim
18 words
An apparatus according to Claim 18, wherein said first means comprises a data register and a digital/analog converter.
Claim 26
Dependent Claim
30 words
An apparatus according to Claim 18, wherein said third means generates a maximum voltage and a minimum voltage which are of mutually opposite polarities with respect to the fixed voltage.
Claim 27
Dependent Claim
34 words
An apparatus according to Claim 18, wherein said fixed voltage is a voltage set to an intermediate value between the maximum output voltage and the minimum output voltage of the drive voltage generating unit.
Claim 28
Dependent Claim
30 words
An apparatus according to Claim 18, wherein said fixed voltage is a mid voltage between the maximum output voltage and the minimum output voltage of the drive voltage generating unit.
Claim 29
Dependent Claim
128 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the plurality of voltages obtained by the subtraction will be prescribed voltages varying depending on an external temperature.
Claim 30
Dependent Claim
128 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the plurality of voltages obtained by the subtraction will be prescribed voltages varying depending on an external temperature.
Claim 31
Dependent Claim
35 words
An apparatus according to Claim 25, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the plurality of the voltages obtained by the subtraction, respectively.
Claim 32
Dependent Claim
47 words
An apparatus according to Claim 25, which includes a control means; said first means including a plurality of voltage holding means, and the control means controlling the plurality of holding means so that they will respectively hold one of the plurality of voltages which are serially supplied.
Claim 33
Dependent Claim
18 words
An apparatus according to Claim 25, wherein said first means comprises a data register and a digital/analog converter.
Claim 34
Dependent Claim
30 words
An apparatus according to Claim 25, wherein said third means generates a maximum voltage and a minimum voltage which are of mutually opposite polarities with respect to the fixed voltage.
Claim 35
Dependent Claim
130 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the plurality of different voltages held by the first means will be prescribed voltages varying depending on an external temperature.
Claim 36
Dependent Claim
130 words
A driving apparatus, comprising: a) a driving unit including a scanning electrode driver and a data electrode driver for driving an electrode matrix formed of scanning electrodes and data electrodes, b) a drive voltage generating unit including a first means for holding a plurality of different voltages, a second means for generating a fixed voltage, and a third means for generating a plurality of voltages each obtained from one voltage of the plurality of the different voltages either by subtracting the fixed voltage from the one voltage or by subtracting the one voltage from the fixed voltage, and c) control means for controlling the drive voltage generating means so that the plurality of different voltages held by the first means will be prescribed voltages varying depending on an external temperature.
Claim 37
Dependent Claim
35 words
An apparatus according to Claim 30, wherein said drive voltage generating unit includes means for generating voltages equal to additions of an offset voltage to the plurality of the voltages obtained by the subtraction, respectively.
Claim 38
Dependent Claim
47 words
An apparatus according to Claim 30, which includes a control means; said first means including a plurality of voltage holding means, and the control means controlling the plurality of holding means so that they will respectively hold one of the plurality of voltages which are serially supplied.
Claim 39
Dependent Claim
18 words
An apparatus according to Claim 30, wherein said first means comprises a data register and a digital/analog converter.
Claim 40
Dependent Claim
30 words
An apparatus according to Claim 25, wherein said third means generates a maximum voltage and a minimum voltage which are of mutually opposite polarities with respect to the fixed voltage.
References Cited (Backward Citations)
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