CN1941037A - Driver of plasma display screen - Google Patents
Driver of plasma display screen Download PDFInfo
- Publication number
- CN1941037A CN1941037A CNA2005100947939A CN200510094793A CN1941037A CN 1941037 A CN1941037 A CN 1941037A CN A2005100947939 A CNA2005100947939 A CN A2005100947939A CN 200510094793 A CN200510094793 A CN 200510094793A CN 1941037 A CN1941037 A CN 1941037A
- Authority
- CN
- China
- Prior art keywords
- electrode
- mentioned
- pulse
- drive unit
- plasma panel
- 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.)
- Pending
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
A driving device for plasma display includes X electrodes enforcing data pulse, Y electrodes enforcing scanning and maintaining pulse, Z electrodes enforcing coordinate supporting pulse. There is a switch on each Y electrode, at one of the switch open scanning pulse is enforced to the selected electrode, the other switches are closed. This invention decreases noise and the discharge effect and eliminate brightness difference caused by coil impedance.
Description
Technical field
The invention relates to plasma panel, more specifically say so about the drive unit of plasma panel.
Background technology
Fig. 1 is that the drive unit of common plasma panel constitutes block diagram.As shown in Figure 1, signal processing part 110 converts the signal of video signal from the outside input to and is fit to the image data that plasma panel drives.
X electrode drive portion 130 and Y electrode drive portion 140 will be used for forming the address pulse and the scanning impulse of wall voltage on the discharge cell of plasma panel, be applied to respectively on X electrode and the Y electrode.150 in Y electrode drive portion 140 and Z electrode drive portion alternately apply the support pulse to Y electrode and Z electrode respectively, support that pulse is used to keep the discharge of formation by the discharge cell that wall voltage is arranged (cell).
High-voltage driving circuit portion 170 is responsible for from master control part 160 receive logic gating pulse, and the high voltage control pulse is added to X electrode, Y electrode and Z electrode drive portion 130,140,150.
At this moment, Y electrode drive portion 140 is provided with scanner driver 210 as shown in Figure 2 in order to apply scanning impulse or support pulse on the Y electrode.Existing scanner driver 210 is the integrated circuit blocks (Integrated Circuit package) that include 2 on-off elements.2 on-off elements form a channel, and apply scanning impulse or support pulse to a Y electrode, so should use withstand voltage big on-off element.Existing scanner driver 210 becomes big owing to be made up of 2 withstand voltage big on-off elements so shortcoming is expense increase, integrated circuit block.
In addition, the channel that is not scanned driver 210 selections in scanning process needs the 1st on-off element (211-1 to 211-n) often to open, and keeps earth level (ground level).
For example: in scanning process, if select and the 1st the relevant channel of Y electrode Y1, relevant with all the other Y electrodes (Y2, Y3......Yn) so channel is then not selected.If selective channel like this, the 2nd on-off element 213-1 of the 1st relevant with selecteed channel so scanner driver 210-1 then opens, and the on-off element 220 of scanning usefulness is opened.Meanwhile, the 1st on-off element (211-2 to 211-n) of the scanner driver (210-2 to 210-n) that non-selected channel is relevant and earthy on-off element 230 are opened.
If on-off element starts, data pulse is applied to X electrode (X1 to Xm), so write operation is carried out in the unit that is positioned at the 1st line (line).In addition, data pulse is by the 1st on-off element (211-2 to 211-n) and earthy on-off element 230 ground connection of the scanner driver (210-2 to 210-n) relevant with all the other Y electrodes (Y2 to Yn).
At this moment, non-selected channel is more than selecteed channel, so the power consumption that is wasted because of ground connection becomes big.Because the 1st on-off element (211-2 to 211-n) and earthy on-off element 230 are opened, cause descending by the voltage that line impedence brought of Y electrode, produce luminance difference about picture thereby make.In addition, the power supply because of integrated circuit block inside changes the probability increase that causes the element breakage.
And, in scanning process or supporting process, voltage standard level according to each electrode, the variation of the dynamic load that produces during discharge (dynamic load) will impact adjacent electrode, trigger noise (noise), the influence of the pulse that produces when perhaps discharging causes fluctuation of service because of flowing into adjacent electrode or unit.
For example, because the 1st on-off element (211-2 to 211-n) of the scanner driver relevant with non-selected channel is opened and ground connection, so in scanning process, will there be very big electric current to pass through, this big electric current will impact adjacent unit or adjacent electrode, produce noise or hinder stable operation.
The figure number 240 of Fig. 2 is the on-off elements that are used for applying to the Y electrode support voltage+Vsy, and figure number 250 is the on-off elements that are used for applying to the Z electrode support voltage+Vsz.
Summary of the invention
The present invention finds out for addressing the above problem, purpose is to provide the drive unit of plasma panel, that is: utilize an on-off element, just can eliminate by the luminance difference about the picture that line impedence brought of electrode, reduce power consumption, and the drive unit of the plasma panel of the reliability of raising on-off element.
For achieving the above object, the drive unit of plasma panel of the present invention comprises X electrode, the Y electrode that applies scanning impulse and support pulse that applies data pulse, the Z electrode that applies common support pulse, be characterized in: each Y electrode package of this drive unit contains an on-off element that is used to apply above-mentioned scanning impulse, above-mentioned on-off element is opened, apply above-mentioned scanning impulse to selecteed Y electrode, remaining on-off element is then closed, and is in suspension joint (floating) state.
Effect of the present invention is: because all the other the Y electrodes beyond the selecteed Y electrode are in floating, thus not only can reduce by noise or influence that discharge caused, and can eliminate by the luminance difference about the picture that line impedence brought of electrode.
Description of drawings
Fig. 1 is that the drive unit of common plasma panel constitutes calcspar.
Fig. 2 is the existing drive unit circuit diagram that comprises the plasma panel of scanner driver.
Fig. 3 is the drive unit circuit diagram of plasma panel of the present invention.
Fig. 4 is the drive waveforms figure of pdp driving apparatus of the present invention.
Embodiment
Below with reference to accompanying drawings embodiments of the invention are elaborated.
Fig. 3 is the drive unit circuit diagram of plasma panel of the present invention.Below with reference to Fig. 3 the operation of drive unit of the present invention in scanning process and the supporting process is described.
At first, in scanning process, the on-off element (one of SW1 to SWn) of the scanner driver (310-1 to 310-n one of) relevant with selecteed Y electrode (one of Y1 to Yn) is unlocked, and the on-off element of non-selected all the other scanner drivers and earthy on-off element 330,380 are closed, and the data switch element SD1 of data driver (340-1 to 340-m) and scanning are unlocked with on-off element 320 in addition.
Like this, to X electrode (X1 to Xm) apply data driver (340-1 to 340-m) output (+Vd), then apply-Vyscan to selecteed Y electrode (one of Y1 to Yn), so that the unit (cell) that is positioned on the selecteed Y electrode (one of Y1 to Yn) is carried out writing of data.
At this moment, because the on-off element of earthy on-off element 330,380 and non-selected all the other scanner drivers is closed, so all the other the Y electrodes except that selecteed Y electrode (one of Y1 to Yn) are in floating.
For example, the on-off element SW1 of the scanner driver 310-1 relevant with the 1st Y electrode Y1 is unlocked, and non-selected all the other scanner drivers (310-2 to 310-n) and earthy on-off element are closed.In addition, the data of data driver (340-1 to 340-m) are unlocked with on-off element 320 with on-off element SD1 and scanning.Like this, will apply-Vyscan, apply+Vd, thereby the voltage difference of Vyscan+Vd will take place in being present in the 1st unit on the Y electrode Y1, write to carry out data at X electrode (X1 to Xm) at the 1st Y electrode Y1.At this moment, because the on-off element (SW2 to SWn) of earthy on-off element 330,380 and non-selected all the other scanner drivers (310-2 to 310-n) is closed, so all the other the Y electrodes (Y2 to Yn) except that the 1st Y electrode Y1 are in quick condition.
As mentioned above, because non-selected Y electrode is in floating, thus can not produce the voltage decline that brings by the electrode wires impedance in the prior art, thus the luminance difference about picture can be eliminated, improve image quality.
Moreover, because non-selected Y electrode is in floating, so in scanning process, can not produce the 1st on-off element ground connection that is unlocked on the non-selected scanner driver and cause big electric current, therefore can solve many problems of bringing by noise.
So, after all Y electrodes (Y1 to Yn) are finished scanning process, carry out supporting process.
At first, support to be unlocked with on-off element 350, the on-off element (SW1 to SWn) of the scanner driver of each electrode is closed, and earthy on-off element 360 is unlocked.Therefore, between diode (D1 to Dn), Y electrode (Y1 to Yn), Z electrode (Z1 to Zn), earthy on-off element 360 and the ground supported with on-off element 350, scanner driver, form loop (loop), support voltage Vsy to be applied to Y electrode (Y1 to Yn).
Secondly, support to be unlocked with on-off element 370, the on-off element (SW1 to SWn) of the scanner driver of each electrode is closed, and earthy on-off element 330,380 is unlocked.At this moment, support to be closed with on-off element 320 with on-off element 350 and scanning.Therefore, between supporting, form the loop, support voltage Vsy to be applied to Z electrode (Z1 to Zn) thereby make with on-off element 370, Z electrode (Z1 to Zn), Y electrode (Y1 to Yn), earthy on-off element 330,380 and ground.
Fig. 4 is the drive waveforms figure of pdp driving apparatus of the present invention.As shown in Figure 4, drive waveforms figure of the present invention constitutes between (reset) interval, address section and supporting area by resetting.
At this moment, drive unit of the present invention as mentioned above because all the other the Y electrodes beyond the selecteed Y electrode are in floating but not ground state in scanning process, so shown in dotted line, level (level) is not in stationary state, and has the suspension joint level.Therefore, if non-selected all the other Y electrodes are in floating, not only can reduce the influence that is caused by noise and discharge, and can eliminate by the luminance difference about the picture that line impedence brought of electrode.
As mentioned above, the field professional can implement the present invention with other concrete form fully under the present invention under the situation that does not change the technology of the present invention thought or essential feature.
Claims (4)
1, a kind of drive unit of plasma panel comprises X electrode, the Y electrode that applies scanning impulse and support pulse that applies data pulse, the Z electrode that applies common support pulse, the drive unit of described plasma panel, and its feature comprises:
Each Y electrode of above-mentioned drive unit comprises an on-off element that is used to apply above-mentioned scanning impulse;
Above-mentioned on-off element is opened, and applies above-mentioned scanning impulse to selecteed Y electrode, and the rest switch element is closed, and is in floating.
2, the drive unit of plasma panel according to claim 1, its feature also comprises:
When applying above-mentioned support pulse, conducting makes above-mentioned support pulse be applied to the diode of above-mentioned Y electrode.
3, as the drive unit of plasma panel as described in the claim 2, it is characterized in that:
During above-mentioned diode current flow, above-mentioned on-off element is closed.
4, as the drive unit of plasma panel as described in claim 2 or 3, it is characterized in that:
The cathode terminal of above-mentioned diode is connected an end of above-mentioned on-off element, and the anode tap of above-mentioned diode is connected the other end of above-mentioned on-off element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100947939A CN1941037A (en) | 2005-09-30 | 2005-09-30 | Driver of plasma display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100947939A CN1941037A (en) | 2005-09-30 | 2005-09-30 | Driver of plasma display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1941037A true CN1941037A (en) | 2007-04-04 |
Family
ID=37959171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100947939A Pending CN1941037A (en) | 2005-09-30 | 2005-09-30 | Driver of plasma display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1941037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018161307A1 (en) * | 2017-03-09 | 2018-09-13 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and electronic device |
-
2005
- 2005-09-30 CN CNA2005100947939A patent/CN1941037A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018161307A1 (en) * | 2017-03-09 | 2018-09-13 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and electronic device |
| US10712888B2 (en) | 2017-03-09 | 2020-07-14 | Shenzhen GOODIX Technology Co., Ltd. | Capacitance detection circuit and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100658133B1 (en) | Driving device and driving method | |
| US6731276B1 (en) | Active matrix light-emitting display apparatus | |
| CN1848217B (en) | Plasma display apparatus and method of driving the same | |
| CN100428295C (en) | Plasma display panel driving device and method | |
| CN1282945C (en) | Method and apparatus for driving plasma display panel | |
| CN1808539A (en) | Plasma display device and driving method thereof | |
| US6756977B2 (en) | Display device and method of driving a display panel | |
| US7042423B2 (en) | Driving apparatus for a display panel | |
| US8077119B2 (en) | Display panel drive apparatus having a noise reducing driver | |
| CN100449592C (en) | Panel driving method, panel driving apparatus and display panel | |
| US7382346B2 (en) | Driving device of flat display panel and method thereof | |
| CN1664896A (en) | Apparatus and method for driving plasma display panel | |
| CN1941037A (en) | Driver of plasma display screen | |
| CN1182510C (en) | Liquid crystal displaying element | |
| US20020126069A1 (en) | AC surface discharge plasma display panel and method for driving the same | |
| CN100353398C (en) | Method for driving plasma display panel using selective inversion address method | |
| EP1577867A2 (en) | Apparatus for driving plasma display panel including scan driver | |
| CN100530294C (en) | Plasma display apparatus | |
| CN101055691A (en) | Driving device of the plasm display board | |
| CN1614666A (en) | Plasma display panel driving method | |
| KR100272280B1 (en) | Driving device of plasma display panel | |
| CN1680986A (en) | Plasma display apparatus and method for driving the same | |
| KR100489277B1 (en) | Method and apparatus for driving plasma display panel | |
| KR20050100531A (en) | Device for driving plasma display panel | |
| KR20060020292A (en) | Method of analyzing impedance of an electron emission display panel and method of driving electron emission display device utilizing thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |