SE8104364L - MONITORING CONNECTION FOR CHECKING THE CONNECTIONS OF LCD INDICATORS - Google Patents
MONITORING CONNECTION FOR CHECKING THE CONNECTIONS OF LCD INDICATORSInfo
- Publication number
- SE8104364L SE8104364L SE8104364A SE8104364A SE8104364L SE 8104364 L SE8104364 L SE 8104364L SE 8104364 A SE8104364 A SE 8104364A SE 8104364 A SE8104364 A SE 8104364A SE 8104364 L SE8104364 L SE 8104364L
- Authority
- SE
- Sweden
- Prior art keywords
- checking
- connections
- segment
- condenser
- lead
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
- G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
In a monitoring circuit for checking the connections of liquid crystal displays and their segment drivers, each segment (3) is connected, e.g. via a conducting elastomer (4), through first lead (5) directly to the driver circuit for normal control and simultaneously via second lead (6) to a checking condenser (9). When segment (11) is activated the condenser (9) in loop (i) is charged and discharged by the control module (8), e.g. a microprocessor in multiplex with the normal activation signals, the condenser current being apparent as a potential drop across resistor 10 for comparison with required values. The circuit may be used in a liquid crystal display in a taximeter. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803026848 DE3026848A1 (en) | 1980-07-16 | 1980-07-16 | MONITORING CIRCUIT FOR CONTROLLING THE CONNECTIONS OF LCD DISPLAYS |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8104364L true SE8104364L (en) | 1982-01-17 |
SE443060B SE443060B (en) | 1986-02-10 |
Family
ID=6107285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8104364A SE443060B (en) | 1980-07-16 | 1981-07-14 | MONITORING CONNECTION FOR CHECKING THE CONNECTIONS OF LCD INDICATORS |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT382256B (en) |
DE (1) | DE3026848A1 (en) |
FR (1) | FR2487099A1 (en) |
GB (1) | GB2080593B (en) |
SE (1) | SE443060B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59111197A (en) * | 1982-12-17 | 1984-06-27 | シチズン時計株式会社 | Driving circuit for matrix type display unit |
DE3432247C2 (en) * | 1984-09-01 | 1986-12-18 | Mannesmann Kienzle GmbH, 7730 Villingen-Schwenningen | Arrangement for displaying a malfunction of a liquid crystal display |
IT1222120B (en) * | 1987-07-24 | 1990-08-31 | Nuovo Pignone Spa | PROCEDURE FOR THE CONTINUOUS AND AUTOMATIC CONTROL OF THE ELECTRIC EFFICIENCY AND OF THE DRIVING CONGRUENCE IN A LIQUID CRYSTAL INDICATOR |
US4951037A (en) * | 1988-03-17 | 1990-08-21 | Honeywell Inc. | Display segment fault detection apparatus |
DE4036521C2 (en) * | 1990-11-16 | 1996-09-05 | Vdo Schindling | Device for the visual inspection of a liquid crystal display |
FR2783927B1 (en) | 1998-09-28 | 2001-02-16 | St Microelectronics Sa | POWER CIRCUIT FOR CONTROLLING A PLASMA SCREEN, POWER MODULE INCORPORATING SAME AND METHOD FOR TESTING SUCH A MODULE |
US8436844B2 (en) * | 2009-06-18 | 2013-05-07 | Roche Diagnostics Operations, Inc. | Bi-stable display fail safes and devices incorporating the same |
DE202019002401U1 (en) | 2019-05-31 | 2019-06-27 | Alexander Mlynek | Electronic device for data acquisition from the liquid crystal display of a measuring device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3943500A (en) * | 1974-05-02 | 1976-03-09 | Dresser Europe S.A. | Seven-segment display arrangement and liquid fuel dispensing pump embodying the same |
DE2502794A1 (en) * | 1975-01-24 | 1976-07-29 | Bizerba Werke Kraut Kg Wilh | ELECTRONIC NUMERAL DISPLAY |
DE2743907A1 (en) * | 1977-09-29 | 1979-04-12 | Siemens Ag | PASSIVE ELECTRO-OPTICAL DISPLAY |
CH627575A5 (en) * | 1978-06-09 | 1982-01-15 | Mettler Instrumente Ag | MULTISEGMENT LIQUID CRYSTAL DISPLAY WITH A FUNCTION MONITORING CIRCUIT. |
CH627576A5 (en) * | 1978-07-18 | 1982-01-15 | Mettler Instrumente Ag | LIQUID CRYSTAL SEGMENT DISPLAY WITH A MONITORING CIRCUIT. |
DE2951584A1 (en) * | 1979-12-21 | 1981-07-16 | Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen | METHOD AND ARRANGEMENT FOR CONTROLLING, MONITORING AND CONTROLLING THE OPERATION OF A MOST PASSIVE DATA DISPLAY, ESPECIALLY E.g. A LIQUID CRYSTAL DISPLAY (LCD DISPLAY) |
-
1980
- 1980-07-16 DE DE19803026848 patent/DE3026848A1/en active Granted
-
1981
- 1981-06-25 AT AT0283281A patent/AT382256B/en not_active IP Right Cessation
- 1981-06-29 FR FR8112739A patent/FR2487099A1/en active Granted
- 1981-07-02 GB GB8120445A patent/GB2080593B/en not_active Expired
- 1981-07-14 SE SE8104364A patent/SE443060B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3026848A1 (en) | 1982-02-04 |
FR2487099B1 (en) | 1984-11-30 |
ATA283281A (en) | 1986-06-15 |
GB2080593B (en) | 1984-07-25 |
SE443060B (en) | 1986-02-10 |
DE3026848C2 (en) | 1989-01-05 |
GB2080593A (en) | 1982-02-03 |
AT382256B (en) | 1987-02-10 |
FR2487099A1 (en) | 1982-01-22 |
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