EP1324306A2 - Anordnung zur Ansteuerung einer Anzeigevorrichtung mit Spannungsvervielfacher - Google Patents
Anordnung zur Ansteuerung einer Anzeigevorrichtung mit Spannungsvervielfacher Download PDFInfo
- Publication number
- EP1324306A2 EP1324306A2 EP02102800A EP02102800A EP1324306A2 EP 1324306 A2 EP1324306 A2 EP 1324306A2 EP 02102800 A EP02102800 A EP 02102800A EP 02102800 A EP02102800 A EP 02102800A EP 1324306 A2 EP1324306 A2 EP 1324306A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- display device
- partial
- vcol
- arrangement
- 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.)
- Ceased
Links
- 230000001276 controlling effect Effects 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Definitions
- the invention relates to an arrangement for controlling a display device with columns and rows where the rows and columns of the display device have voltages can be supplied depending on the data to be displayed.
- the display technology or display technology will always come in the next few years more important role in information and communication technology.
- the display device has a central one between human and digital world Significance for the acceptance of modern information systems.
- portable Devices such as B. Notebooks, phones, digital cameras and personal digital assistant not possible without the use of displays.
- Passive displays is a very common display technology that For example, is used in laptops and mobile phones. Using the passive matrix display Technology, large displays can be realized, these mostly on the (S) TN (Super Twisted Nematic) effect.
- a pixel in its grayscale is represented by the waveform of the voltages applied to the columns and rows.
- the walk Arrangements for driving the display devices or driver circuits Image signals that are to be shown on a display in the corresponding Tensions around.
- the image information is stored in memories as digital signals. These digital signals must be converted into analog signals so that by means of corresponding light intensity can be displayed for an analog voltage can.
- the digital-to-analog converters required for this conversion must be digital Convert signals to voltages that range up to less than 20 mV go more than 10 V.
- voltage multiplier circuits which Usually run as charge pumps that are available with the standing system supply voltage and the system supply voltage through the series connection of pump stages to the required output voltage pump up.
- a pump stage consists of a switching device and a charge storage element.
- the voltage multipliers are built up in several stages, so that depending on the number of stages a higher one Voltage is generated as the supply voltage.
- the display device In order to control the columns or rows of display devices Generating the number of voltages is used in previously known control circuits the display device, the supply voltage of a voltage multiplication unit first fed. It is used to control passive matrix displays necessary to apply a number of voltages with a certain relationship to each other produce. After the voltage multiplication unit the supplied supply voltage has multiplied according to the set multiplication factor this multiplied voltage is fed to a voltage divider unit, which then, if necessary generated several partial voltages. The partial voltages are of the voltage level still on the digital level, so that they are regularly fed to a reinforcement. The amplifier then amplifies these partial voltages, so that the voltage multiplier generated column tension the columns and the increased partial tension of the rows can be supplied to a display device.
- a disadvantage of this known design is the initial pumping up Supply voltage in order to generate partial voltages from the voltage then divide it down again and then reinforce it again.
- the object of the invention is to provide an arrangement for voltage generation Specify an arrangement for controlling a display device in the case of energy losses and inaccuracies are avoided.
- the invention is based on the idea that for controlling a display device Fixed tension ratios are often required. With a conventional circuit it is difficult on the one hand to set an exact tension ratio, because many involved Components such as the amplifier and also the voltage divider unit Have inaccuracy that leads to the fact that the tension ratio is inaccurate and depends on the supply voltage and environmental influences. On the other hand, this is Order not very efficient.
- three different voltage values needed that the display device in particular on the columns and rows are fed.
- the mean voltage is exactly half as high as the highest Tension.
- the supply voltage is first supplied to the voltage divider unit and then reinforced.
- the amplified partial voltage value becomes a voltage multiplier fed, which performs a voltage doubling. Through this architecture the result is that exactly twice the partial voltage is always generated.
- Another advantage of the invention results from the fact that the high doubled Voltage only in the voltage multiplier and at the output to the display device occurs. This allows the rest of the voltage multiplier to be located Circuit components are dimensioned smaller. In the known circuit after Both the voltage divider unit and the amplifier had to be state of the art be designed for the high voltage.
- the voltage multiplier is also amplified another factor, the voltage supplied to it, for example by a factor of 3.
- a driver circuit is configured as a master, which provides the highest voltage Vcol / 2 and the second driver circuit is used as a slave, where the voltage Vcol / 2 is used as an input to get out of it to generate the maximum column voltage Vcol by doubling. In this case ensures that the same voltage uses Vcol / 2 from both driver circuits becomes.
- the voltages Vdd and Vss are supplied to the arrangement for actuation when Driving a display device, all columns are either with the Vdd or Vss in Dependency of the supplied image data connected.
- the voltage Vcol / 2 becomes the Arrangement for controlling the rows supplied, from which the row columns Vrow + and Vrow- are generated that are symmetrical to Vcol / 2.
- a voltage bisector works on the reverse voltage doubler principle.
- Both regulated and unregulated voltage multipliers can be used as voltage multipliers are used, with an unregulated voltage multiplier only a fixed one Multiplication, is therefore much simpler and therefore cheaper is, but is sufficient for the function required here. Even unregulated Voltage multipliers can be implemented with different factors.
- the object is also achieved by a display device which has one described above Arrangement used for control.
- the most effective is to be used Components required because the duration of use of the device depends on energy consumption is influenced and thus any energy saving an extension of the period of use or brings a reduction in battery capacity, resulting in a Weight reduction is effected.
- the configuration according to the invention works more effectively in terms of energy consumption. Smaller components can also be used be used.
- FIG. 1 shows a block diagram for controlling a display 2.
- the Information to be displayed is stored in unit 5 or is generated by it generated.
- Unit 5 also generates the necessary waveforms that the Display device on the columns and rows are fed.
- the display 2 is at least one column driver 1 and one row driver 2 are assigned.
- Vss 0V
- Vcol 4V
- Vcol / 2 2V
- Vrow + 20V
- Vrow- -16V.
- Figure 2 shows an arrangement for controlling a display device according to the prior art of the technique. It shows in particular the generation of the voltage relationships (Vss, Vcol, Vcol / 2) in a form previously used. The voltages Vdd and Vss fed. A voltage multiplier 10 multiplies the voltage supplied Vdd, which in turn is fed to a partial voltage generation unit 12. One of the appropriate ratio adjusted partial voltage is generated from the column voltage Vcol generated and fed to the amplifier 13. The amplifier 13 indicates its output the boosted voltage Vcol / 2 for supply to the line driver circuit the display device. It is clear that all components 10, 12 and 13 are for the multiplied voltage Vcol must be designed. In addition, a pumped up Voltage Vcol divided down again in the partial voltage generation unit 12, to be reinforced afterwards.
- FIG. 3 shows an arrangement according to the present invention.
- the supply voltage Vdd becomes the partial voltage generation unit 12 and the amplifier 13 fed.
- the partial voltage generation unit generates from the supply voltage Vdd 12 a partial voltage, which is fed to the amplifier 13, from which the Voltage Vcol / 2 generated.
- the voltage Vcol / 2 now becomes the voltage multiplier 11, which generates the column voltage Vcol therefrom.
- the voltage multiplier can also multiply by a factor of 3 or more.
- the ratio of the voltages to be generated depends on the driver method used from.
- the arrangement for generating the voltages can also be used in other driver circuits are used, for example in MRA driver circuits. In principle, it is everywhere there can be used where symmetrical voltage conditions are required.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
Description
- Fig. 1:
- Blockschaltbild zur Ansteuerung einer Anzeigeanordnung
- Fig. 2:
- Treiberschaltung nach den Stand der Technik
- Fig. 3:
- erfindungsgemäße Treiberschaltung
Claims (6)
- Anordnung zur Ansteuerung einer Anzeigevorrichtung mit Spalten und Zeilen, bei der den Zeilen und Spalten der Anzeigevorrichtung (2) Spannungen (Vcol, Vcol/2, Vss, Vrow+, Vrow-) in Abhängigkeit darzustellender Daten zuführbar sind und die Anordnung wenigstens eine Spannungsteilereinheit (12) und eine Spannungsvervielfachereinheit (11) aufweist und bei der vorgesehen ist, der Spannungsteilereinheit eine Versorgungsspannung (Vdd) zuzuführen und eine aus der Spannungsteilereinheit abgeleitete Teilspannung einer Spannungsvervielfachereinheit zuzuführen und die Teilspannung und die durch die Spannungsvervielfachereinheit erzeugte Spannung der Anzeigevorrichtung zuzuführen.
- Anordnung nach Anspruch 1,
dadurch gekennzeichnet, dass eine Verstärkereinheit (13) vorgesehen ist, die zur Verstärkung der von der Spannungsteilereinheit erzeugten Teilspannung vorgesehen ist, wobei mittels der Spannungsvervielfachereinheit eine definierbare Vervielfachung der verstärkten Teilspannung erzeugbar ist. - Anordnung nach den Ansprüchen 1 oder 2,
dadurch gekennzeichnet, dass zur Erzeugung von drei festen Spannungswerten, die zur Zuführung zur Anzeigevorrichtung vorgesehen sind, zuerst eine Erzeugung einer Teilspannung aus einer Versorgungsspannung und danach eine Vervielfachung dieser Teilspannung mittels einer Spannungsvervielfachereinheit vorgesehen ist. - Anordnung nach den Ansprüchen 1 bis 3,
dadurch gekennzeichnet, dass die Spannungsvervielfachereinheit eine Verdopplung der zugeführten Teilspannung vornimmt. - Anordnung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet, dass als Spannungsvervielfacher ein ungeregelter Spannungsvervielfacher einsetzbar ist. - Anzeigevorrichtung mit einer Anordnung nach einem der Ansprüchen 1 bis 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10162765 | 2001-12-20 | ||
| DE10162765A DE10162765A1 (de) | 2001-12-20 | 2001-12-20 | Anordnung zur Ansteuerung einer Anzeigevorrichtung mit Spannungsvervielfacher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1324306A2 true EP1324306A2 (de) | 2003-07-02 |
| EP1324306A3 EP1324306A3 (de) | 2007-02-14 |
Family
ID=7710045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02102800A Ceased EP1324306A3 (de) | 2001-12-20 | 2002-12-18 | Anordnung zur Ansteuerung einer Anzeigevorrichtung mit Spannungsvervielfacher |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6885155B2 (de) |
| EP (1) | EP1324306A3 (de) |
| JP (1) | JP2003248471A (de) |
| CN (1) | CN100337265C (de) |
| DE (1) | DE10162765A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10996731B2 (en) | 2017-07-25 | 2021-05-04 | Dell Products, L.P. | Buck-boost conversion in an information handling system |
| US11073885B2 (en) | 2017-07-25 | 2021-07-27 | Dell Products, L.P. | Battery architecture for variable loads and output topologies in an information handling system |
| US10811895B2 (en) | 2017-07-25 | 2020-10-20 | Dell Products, L.P. | Wireless charging with power flux boost in an information handling system |
| US11069309B2 (en) | 2017-07-25 | 2021-07-20 | Dell Products, L.P. | Reducing the power consumption of high-dynamic range (HDR) displays via buck-boost conversion |
| US11347296B2 (en) | 2017-07-25 | 2022-05-31 | Dell Products, L.P. | Backlight dimming via buck-boost conversion in an information handling system |
| CN114743505B (zh) * | 2022-04-29 | 2023-06-27 | 武汉华星光电半导体显示技术有限公司 | 显示装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2078021A (en) | 1980-06-13 | 1981-12-23 | Hitachi Ltd | Power supply circuits |
| US5513091A (en) | 1994-03-29 | 1996-04-30 | Kabushiki Kaisha Toshiba | Voltage transforming circuit |
| US5861861A (en) | 1996-06-28 | 1999-01-19 | Microchip Technology Incorporated | Microcontroller chip with integrated LCD control module and switched capacitor driver circuit |
| US5986649A (en) | 1995-01-11 | 1999-11-16 | Seiko Epson Corporation | Power circuit, liquid crystal display device, and electronic equipment |
| EP0990940A1 (de) | 1998-02-23 | 2000-04-05 | Seiko Epson Corporation | Verfahren zur ansteuerung eines elektrooptischen gerätes, schaltkreis zur ansteuerung eines elektrooptischen gerätes, elektrooptisches gerät und elektronisches gerät |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9115402D0 (en) * | 1991-07-17 | 1991-09-04 | Philips Electronic Associated | Matrix display device and its method of operation |
| JP3276725B2 (ja) * | 1992-10-07 | 2002-04-22 | 株式会社日立製作所 | 液晶表示装置 |
| JP3234043B2 (ja) * | 1993-05-10 | 2001-12-04 | 株式会社東芝 | 液晶駆動用電源回路 |
| JP3329077B2 (ja) * | 1993-07-21 | 2002-09-30 | セイコーエプソン株式会社 | 電源供給装置、液晶表示装置及び電源供給方法 |
| US5956006A (en) * | 1994-06-10 | 1999-09-21 | Casio Computer Co., Ltd. | Liquid crystal display apparatus and method of driving the same, and power supply circuit for liquid crystal display apparatus |
| JPH0868985A (ja) * | 1994-08-30 | 1996-03-12 | Mitsubishi Electric Corp | 液晶表示装置 |
| CN1106584C (zh) * | 1999-01-08 | 2003-04-23 | 精工爱普生株式会社 | 液晶驱动用电源装置及使用它的液晶装置和电子仪器 |
| US6198466B1 (en) * | 1999-09-24 | 2001-03-06 | L3 Communications Electrodynamics, Inc. | Multifunctional digital indicator |
| US6359389B1 (en) * | 2000-06-09 | 2002-03-19 | Silicon Graphics, Inc. | Flat panel display screen with programmable gamma functionality |
-
2001
- 2001-12-20 DE DE10162765A patent/DE10162765A1/de not_active Withdrawn
-
2002
- 2002-12-17 JP JP2002365663A patent/JP2003248471A/ja active Pending
- 2002-12-17 CN CNB02156390XA patent/CN100337265C/zh not_active Expired - Fee Related
- 2002-12-18 US US10/323,345 patent/US6885155B2/en not_active Expired - Fee Related
- 2002-12-18 EP EP02102800A patent/EP1324306A3/de not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2078021A (en) | 1980-06-13 | 1981-12-23 | Hitachi Ltd | Power supply circuits |
| US5513091A (en) | 1994-03-29 | 1996-04-30 | Kabushiki Kaisha Toshiba | Voltage transforming circuit |
| US5986649A (en) | 1995-01-11 | 1999-11-16 | Seiko Epson Corporation | Power circuit, liquid crystal display device, and electronic equipment |
| US5861861A (en) | 1996-06-28 | 1999-01-19 | Microchip Technology Incorporated | Microcontroller chip with integrated LCD control module and switched capacitor driver circuit |
| EP0990940A1 (de) | 1998-02-23 | 2000-04-05 | Seiko Epson Corporation | Verfahren zur ansteuerung eines elektrooptischen gerätes, schaltkreis zur ansteuerung eines elektrooptischen gerätes, elektrooptisches gerät und elektronisches gerät |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003248471A (ja) | 2003-09-05 |
| US20030122503A1 (en) | 2003-07-03 |
| CN100337265C (zh) | 2007-09-12 |
| EP1324306A3 (de) | 2007-02-14 |
| US6885155B2 (en) | 2005-04-26 |
| CN1427384A (zh) | 2003-07-02 |
| DE10162765A1 (de) | 2003-07-03 |
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