EP1237140B1 - Schaltungsanordnung zur Ansteuerung einer Anzeige - Google Patents

Schaltungsanordnung zur Ansteuerung einer Anzeige Download PDF

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Publication number
EP1237140B1
EP1237140B1 EP02003965A EP02003965A EP1237140B1 EP 1237140 B1 EP1237140 B1 EP 1237140B1 EP 02003965 A EP02003965 A EP 02003965A EP 02003965 A EP02003965 A EP 02003965A EP 1237140 B1 EP1237140 B1 EP 1237140B1
Authority
EP
European Patent Office
Prior art keywords
display
vfd
led
control
lcd
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02003965A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1237140A1 (de
Inventor
Henry Fluhrer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Diehl AKO Stiftung and Co KG
Original Assignee
Diehl AKO Stiftung and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Publication of EP1237140A1 publication Critical patent/EP1237140A1/de
Application granted granted Critical
Publication of EP1237140B1 publication Critical patent/EP1237140B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G09G3/04—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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • 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
    • G09G3/06—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 using controlled light sources
    • 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
    • G09G3/06—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 using controlled light sources
    • G09G3/12—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 using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes

Definitions

  • the invention relates to a circuit arrangement for controlling a VFD, LED or LCD display.
  • Such displays are e.g. Widely used in small electrical appliances. They serve et al to display the time or the temperature. For electronic cooker timers You will also find signs for the set on such displays Operating mode of the stove or oven or for other functions such as Alarm or radio reception.
  • a numeric display (for example, for the time) will be here usually realized by means of 7-segment display.
  • VFD vacuum fluorescence display
  • a heated cathode In a vacuum fluorescence display (VFD) is behind the numbers to be displayed, a heated cathode.
  • the individual, corresponding segments of the different (7-segment) digits are each connected in parallel with each other and form the anodes.
  • Between the heated cathodes and the segments serving as anodes grids are mounted, each extending over the area of a digit.
  • a segment of a given digit lights up when both the corresponding to this segment anode as well as this paragraph corresponding Grid are on positive voltage. Via a multiplex control of the segments and the digits is thus every single segment of each one Number separately controllable.
  • the individual segments are the digits each formed by individual LEDs.
  • the individual, corresponding to each other Segments of different numbers are in turn parallel to each other interconnect and form the cathode, while the different digits (digits) form the anodes.
  • each segment by means of multiplex control be addressed separately.
  • VFD has either positive voltage at the terminals or no voltage is applied while to the terminals of the LED indicator positive (for numbers) or negative (for segments) or no voltage applied becomes.
  • liquid crystal display takes place fundamentally different.
  • passive elements which are on a the Ambient light backscattering substrate are applied.
  • Is attached to such Element applied an electrical voltage, the contained in it Crystals, which absorbs the ambient light at this point, why the element appears dark.
  • the voltage applied to the element must have a certain value Exceed minimum value to effect alignment of the crystals.
  • An LCD is now constructed so that up to 3 segments parallel to each other are interconnected and so form the one electrode.
  • the other electrode is going through formed three back electrodes (COM), each one of the three with each other associated with parallel interconnected segments.
  • COM back electrodes
  • This way is also here again a multiplex control possible.
  • the individual Connections of the display not only two voltage values (positive or negative and zero), but also voltage intermediate values (in the case described 1/3 and 2/3 of the voltage), so that a targeted reloading of individual elements without Influencing the other elements is possible.
  • a circuit for driving various types of displays is from the Datasheet of NEC "S11543EJ2V0DS00, FIP / LCD Static Display Driver ⁇ PD6320 / ⁇ PD6321, October 1996, XP-002198520 "
  • There disclosed circuit has a combined VFD / LCD driver and a separate LED driver, with a part of the outputs of the VFD / LCD driver connected to part of the outputs of the LED Driver are.
  • the information which type of display is controlled by the circuit is to be due to the circuit in the form of a hardware coding at.
  • a LED display can be multiplexed and a VFD or LCD display statically driven become.
  • the disadvantages of the circuit are the limited drive capacity and the necessary hardware coding.
  • control blocks are provided, wherein one of the control blocks necessary for an LCD display control signals generated and the other for a VFD or LED or both Displays necessary control signals generated.
  • the control signals of Control blocks are fed to a common driver block, the corresponding control signals for the VFD / LED display from these control signals and for the LCD display and to the corresponding one Display passes on.
  • VFD, LED and LCD displays are controlled by means of a multiplex drive.
  • a control logic is in operative connection, is stored, which control mode (e.g., VFD 5x Multiplex, LED 7x Multiplex, LCD 3x Multiplex) is.
  • control blocks are provided by each one for the LCD, the VFD and the LED display the necessary Provides control signals.
  • one or more memory elements may be provided be assigned to each of the individual control blocks.
  • the driver module has a plurality of driver elements each of which is connected to one of the VFD, LED or VFD ports LCD display is connected to this terminal and a corresponding drive signal supplies.
  • each driver element with each of the Control blocks is connected, giving it all for driving the connection the necessary control signals are supplied to the connected display.
  • control signals of the control blocks in the driver elements are preferably such interconnects the connection of the connected display with the appropriate one Drive signal is supplied. This interconnection takes place in the development of Invention depending on the type of connected display.
  • control logic, the at least one memory element and the Control blocks executed digitally, while the driver block executed analog is.
  • a circuit arrangement 1 for driving a VFD, LED or LCD display 2 has a data receiver 3, which for the control of the Display receives necessary data from a microprocessor 4, which the data receiver 3 simultaneously supplied with a time 4.1.
  • the data receiver 3 forwards the received data to a control logic 5.
  • the control logic 5 checked the received data and decodes it by being received from the Data addresses, control words and commands extracted.
  • the commands contain the actual display data.
  • This display data is sent to a data memory 6 passed on and saved there. They remain stored unchanged as long as until the display is to be changed. Then new display data will appear in the Data memory 6 stored.
  • control logic 5 a first control block 7, which of the generation of control signals necessary for an LCD display, and a second one Control block 8, which the generation of necessary for a VFD or LED display Control signals are used to indicate which drive mode is set (e.g. VFD / LED 5x, 6x or 7x multiplex, LCD 3x multiplex, night reduction or load shedding; see below).
  • the selected mode is in the ROM block 9, which is in operative connection with the control logic 5.
  • control block becomes 7 or the control block 8 active. Based on him from the data memory. 6 provided display data generates the active control block 7 or 8 in usual and further explained in more detail below way for the respective display. 2 necessary control signals COM 1 to 3 and S 1 to 13 (LCD) or G 1 to 7 and S 1 to 9 (VFD / LED) (see below).
  • the control signals from the control block 8 still go through the level shifter 10, in which, in the presence of a VFD mode, the levels of the control signals of usual 3.3 V to be necessary for a VFD 30 V raised. In the event of a LED mode, this level increase is not necessary.
  • the information about the set mode receives the level shifter 10 as well as the control blocks 7 and 8 from the control logic 5.
  • the control signals of the control blocks 7 and 8 then go to the driver block 11.
  • both control blocks 7 and 8 regardless of set mode are active at any time.
  • the driver elements 11.1 to 11.16 control signals depending on the set mode (LCD or VFD / LED) received only from one of the control blocks 7 and 8.
  • the corresponding information receive the driver elements 11.1 to 11.16 directly from the control logic 5.
  • control logic 5 still controls a reset circuit 12 for the microprocessor 4, a buzzer circuit 13 for a buzzer 14 and a driver 15 for driving relays 16 and 17.
  • a power supply for the individual components of the circuit arrangement 1 for the sake of clarity is not drawn; the power supply takes place but in the usual way.
  • FIG. 2a shows the luminous segments of a VFD or an LED display. With a designated segments are connected in parallel with each other and with the terminal S1 connected, the elements denoted by b with the terminal S2, etc.
  • the terminals G1 to G7 are each connected to the one via a digit (possibly with adjacent symbols).
  • the control for an LED display is basically as straight described, except that at the terminals S1 to S9 instead of a positive one negative Voltage applied.
  • FIG 3a the display elements of an LCD are shown. Up to three of each Display elements are interconnected in parallel and to the terminals S1 connected to S13. The back electrodes of the three elements are respectively connected to the Connection COM 1, COM 2 or COM 3 connected.
  • FIG. 4 now shows a basic circuit diagram in the driver elements 11. 1 to 11 respectively contained interconnection for generating the drive signals for the display 2.
  • the switches 18 and 19 driven by digital signals W4 and W0.
  • a signal i. Voltage applied
  • W4 digital signal
  • the switch 18 while the Switch 19 as well as the switches 20, 21 and 22 remain open.
  • Using a VFD display is now the voltage U present at the output A ' 30 V, when using an LED display only about 2 V. Set at the output no signal, so no voltage applied, the switch 18 is opened and the Switch 19 closed by a digital signal W0.
  • the switches 19, 20, 21 and 22 are used. By closing the corresponding switch by means of the associated, from the control block 7 coming digital signal W0, W1, W2 or W3, the Voltage at the output A to 0, 1/3 U, 2/3 U or U are regulated, where U typically 3.3V.
  • the control logic 5, the memory element 6 and the control blocks 7 and 8 of the Circuit 1 are executed digitally while the driver module 11 is carried out analogously with the driver elements 11.1 to 11.16.
  • the whole Circuit arrangement 1 is designed as an integrated circuit (IC). In these IC are also the reset circuit 12, the buzzer circuit 13 and the relay driver 15 integrated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP02003965A 2001-02-24 2002-02-22 Schaltungsanordnung zur Ansteuerung einer Anzeige Expired - Lifetime EP1237140B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10109157 2001-02-24
DE10109157A DE10109157A1 (de) 2001-02-24 2001-02-24 Schaltungsanordnung zur Ansteuerung einer Anzeige

Publications (2)

Publication Number Publication Date
EP1237140A1 EP1237140A1 (de) 2002-09-04
EP1237140B1 true EP1237140B1 (de) 2005-11-02

Family

ID=7675500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02003965A Expired - Lifetime EP1237140B1 (de) 2001-02-24 2002-02-22 Schaltungsanordnung zur Ansteuerung einer Anzeige

Country Status (4)

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US (1) US6844864B2 (pl)
EP (1) EP1237140B1 (pl)
DE (2) DE10109157A1 (pl)
PL (1) PL198894B1 (pl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6025921A (en) * 1995-01-23 2000-02-15 Ohio Electronics Engravers, Inc. Method and apparatus for engraving a mixed pattern
US7109957B2 (en) * 1999-01-22 2006-09-19 Au Optronics Corp. Digital display driving circuit for light emitting diode display
DE10225996B4 (de) * 2002-06-12 2006-01-12 Diehl Ako Stiftung & Co. Kg Ansteuerschaltung für eine Vakuumfluoreszenz-Anzeige
US7970439B2 (en) * 2005-03-01 2011-06-28 Kyocera Corporation Systems and methods for visual alerting mechanisms on a mobile communication device

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984973A (en) * 1973-10-29 1976-10-12 Hughes Aircraft Company Digital watch with liquid crystal and light emitting diode displays
JPS5665537A (en) * 1979-11-01 1981-06-03 Nec Corp Individual selection callout receiver with display
JPS56162588U (pl) 1980-04-30 1981-12-03
GB2075726B (en) 1980-05-02 1983-11-23 Suwa Seikosha Kk Electronic timepiece
JPS58162988A (ja) * 1982-03-23 1983-09-27 日本電気株式会社 表示装置
US4542799A (en) * 1982-04-28 1985-09-24 Shimadzu Corporation Display device for use in an electronic balance
JPS5991487A (ja) * 1982-11-17 1984-05-26 富士通株式会社 デイスプレイ装置
JPS60227296A (ja) 1984-04-25 1985-11-12 シャープ株式会社 表示制御方式
JPS61213896A (ja) * 1985-03-19 1986-09-22 株式会社　アスキ− デイスプレイコントロ−ラ
JPS6347791A (ja) * 1986-08-15 1988-02-29 株式会社東芝 情報表示説明装置
JPH01248186A (ja) * 1988-03-30 1989-10-03 Toshiba Corp 表示属性変換装置
US5021775A (en) * 1989-02-27 1991-06-04 Motorola, Inc. Synchronization method and circuit for display drivers
JP2722824B2 (ja) * 1991-01-30 1998-03-09 日本電気株式会社 曜日・時刻の表示方式
JPH0519747A (ja) * 1991-07-09 1993-01-29 Toshiba Corp 表示制御装置
EP0692161A4 (en) * 1993-03-19 1996-04-10 Motorola Inc LCD SYSTEM WITH INTEGRATED ERROR DETECTOR
US5694141A (en) * 1995-06-07 1997-12-02 Seiko Epson Corporation Computer system with double simultaneous displays showing differing display images
US20030214458A1 (en) * 2002-05-20 2003-11-20 Vladimir Giemborek Multiple display configuration

Also Published As

Publication number Publication date
US6844864B2 (en) 2005-01-18
DE50204737D1 (de) 2005-12-08
DE10109157A1 (de) 2002-09-26
EP1237140A1 (de) 2002-09-04
PL198894B1 (pl) 2008-07-31
US20020118155A1 (en) 2002-08-29

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