CN1971826A - Plasma display panel - Google Patents
Plasma display panel Download PDFInfo
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- CN1971826A CN1971826A CNA2005101108118A CN200510110811A CN1971826A CN 1971826 A CN1971826 A CN 1971826A CN A2005101108118 A CNA2005101108118 A CN A2005101108118A CN 200510110811 A CN200510110811 A CN 200510110811A CN 1971826 A CN1971826 A CN 1971826A
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Abstract
This invention relates to one plasma display panel, which uses gas discharge gas for picture display panel and comprises the following parts: multi-chip module to generate above electricity signal by use of switch; power supply module to generate drive signals to provide electricity to above module; heat dissipation slice to release above power module; temperature sensor to test above dissipation slice temperature to generate temperature data; feedback controller to echo the above data to generate switch control signals.
Description
Technical field
The invention relates to the technology of plasma display panel, detailed says, is exactly about a kind of temperature when reduce driving, and can carry out the plasma display panel of stabilized driving.
Background technology
All the time as the cathode ray tube (Cathod Ray Tube:CRT) of image display apparatus main flow or Braun tube because big, the heavy shortcoming of its volume, therefore developed a variety of panel display apparatus that can overcome this cathode ray tube deficiency recently gradually, and the trend that replaces existing cathode ray tube has been arranged greatly.
This panel display apparatus mainly contains LCD (Liquid Crystal Display:LCD), plasma display (PDP:Plasma Display Panel), field emission display device (Field Emission Display:FED), electroluminescent display kinds such as (Elcctro Luminescence:EL).
Because it is plasma display can be made into large-sized display, therefore noticeable especially in many flat-panel monitors.
The 147nm ultraviolet ray that plasma display panel is sent when utilizing gas discharge such as He+Xe, Ne+Xe, He+Ne+Xe swash the method for penetrating fluorophor carry out luminous, thereby can show still image and the dynamic image that has comprised writings and image.This plasma display panel is by adjusting each pixel display map discharge time according to video data.Just strengthening exploitation recently, so that the more picture image of high-quality to be provided to this Display Technique.
Utilize the wall electric charge of dielectric layer accumulation when especially 3 electrode AC creeping discharge type plasma display panels are owing to discharge; therefore just reduced the necessary voltage of discharge; and owing to there has been the sputter (Sputtering) of plasma that each electrode is protected, therefore this plasma display panel has advantages such as low and life-span of driven is long.
Fig. 1 is the schematic diagram of the existing plasma display panel structure of simple displaying.
As shown in Figure 1, existing plasma display panel has comprised and has been used for front shell 2 and back case 12, panel 4, heat-dissipating casing 6, framework 8 and printed circuit board (PCB) 10 that inner panel 4 elements such as grade are protected.
Framework (or being called heating panel) 8 is arranged on the back side of panel 4, has not only played support panel 4 effects, but also has when panel 4 drives the effect that can distribute the panel heat.In addition, also be provided with printed circuit board (PCB) (Printed Circuit Board:PCB) at the back side of framework 8, printed circuit board (PCB) is provided with various driver parts.Printed circuit board (PCB) can produce a large amount of heats when carrying out work, framework 8 can receive wherein a part of heat, then it is dispersed into the device outside.For this reason, framework 8 adopts heat conductivility preferred metal materials to make, so that distribute heat effectively.Here said heat conductivility preferred metal material mainly is the metal such as aluminium (Al).
Heat-dissipating casing 6 is inserted between panel 4 and the framework 8.The effect of heat-dissipating casing 6 is that the heat that panel 4 is produced when plasma display panel is driven is communicated to framework 8, by framework 8 heat is dispersed into the outside then, thereby the temperature that prevents panel 4 rises rapidly.For this reason, heat-dissipating casing 6 utilizes adhesive and panel 4 and framework 8 to be bonded together.
Be provided with the system circuit board that is used to drive plasma display panel on the printed circuit board (PCB) 10.In order to realize this structure, printed circuit board (PCB) is fixed on the back side of framework 8.System circuit board has comprised several drive integrated circults.Several drive integrated circults are used for sending various data-signals and sweep signal (Driving Integrated Circuit:DIC) continuously to each scan electrode that is arranged on system circuit board and panel 4 and addressing electrode.In addition, system circuit board has also comprised power supplier, addressing (data) drive unit, scanning driving device and the system driving device that is used to provide data-signal and sweep signal.Drive integrated circult is made of turntable driving integrated circuit and data-driven integrated circuit, is arranged between printed circuit board (PCB) 10 and the panel 4, is used for the control signal that printed circuit board (PCB) 10 sends is responded, and provides drive signal to panel 4.For this reason, printed circuit board (PCB) 10 and panel 4 are coupled together by flexible printer circuit (Flexible Printed Circuit:FPC).Here, cover under brilliant film (Chip On Film:COF) the entrapped situation of mode in each drive integrated circult employing, one example of flexible printer circuit is connected with the integrated circuit (IC) chip of turntable driving integrated circuit and data-driven integrated circuit, and the opposite side of flexible printer circuit is connected with backing plate on being connected panel 4 each electrodes.
Fig. 2 is the schematic diagram that shows printed circuit board (PCB) multi-chip module and fin.
As shown in Figure 2, multi-chip module (Multi Chip Module:MCM) 20 is being set on the printed circuit board (PCB) 10.Multi-chip module just is arranged on outside the drive integrated circult, is used to carry out that plasma display panel drives, and is the various chips of module form.This multi-chip module 20 utilizes above-mentioned flexible printer circuit 16 to link to each other with the backing plate of panel 4.In addition, multi-chip module 20 sends signal by the conductive path 22 that is arranged on the printed circuit board (PCB) 10 to flexible printer circuit 16.
This multi-chip module 20 has comprised application-specific integrated circuit (ASIC) 28 and power supply supplying module (Integated PowerModule:IPM, 24).Application-specific integrated circuit (ASIC) 28 is used to generate the various control signals implementing to drive (for example, sweep signal, address signal, keep signal) and it is controlled.Power supply supplying module 24 is used to provide and drives the required power supply of this application-specific integrated circuit (ASIC) 28.Power supply supplying module 24 is divided into scanning driving device, addressing drive unit, keep device such as drive unit, and is made into an integrated form, provides to drive the required various power supplys of plasma display panel.
Power supply supplying module 24 drives the required various power supplys of plasma display panel owing to providing, and these power supplys have been carried out transformation, therefore can produce a large amount of heats after plasma display panel is driven.So power supply supplying module 24 must be provided with fin 26.The heat that fin 26 is produced in the time of can playing plasma display panel driven is dispersed into the outside, and the effect that chip and module are protected.
On the one hand, plasma display panel can shake, phenomenon such as noise, heating in the course of the work.Especially under the situation of heating, when utilizing data to carry out the picture image demonstration, along with the rising of temperature, the phenomenon that descends can appear in shown image quality.Along with the rising of temperature, even device can also provide under the situation of identical data, decline to a certain degree also can appear in shown image quality.
Along with the rising of temperature, why descending can appear in image quality, be since multi-chip module 20 and drive integrated circult 14 after heating, its runnability can reduce, discharge cell can be damaged.Especially adopt at drive integrated circult 14 and cover under brilliant film (Chip On Film:COF) the entrapped situation of mode,, cover the phenomenon that bad (COF FAIL) can appear moving in brilliant film along with the rising of temperature.
For example, under normal temperature (30 ℃), if the temperature of the plasma display panel that normally moves reaches 70 ℃, bad phenomenon will appear moving in plasma display panel.This is owing to plasma display panel is to utilize high-voltage discharge to carry out the reason that image frame shows.
Because along with continuing to discharge, the heat that whole device produced can surpass 8 of frameworks can be dispersed into outside heat, therefore will residual certain heat in inner element such as drive unit, panel 4.If this residual heat is cumulative, will cause the temperature of plasma display panel to rise.The power supply supplying module 24 that has its source in that the plasma display panel temperature rises.Fin 26 is a kind of to the highstrung parts of temperature, and its temperature can rise according to the temperature of plasma display panel and make reflection soon.The temperature rising that provides various driving voltages to cause owing to power supply supplying module 24 is the main causes that hinder the 24 normal operations of power supply supplying module.
Therefore, because the temperature rising, panel 4 and drive unit, just each composed component of printed circuit board (PCB) 10 just can not carry out operate as normal.This is the existing problem of existing plasma display panel.
Summary of the invention
Therefore, the objective of the invention is and will address the above problem, a kind of temperature when reduce driving is provided, thus plasma display panel that can stable operation.
To achieve these goals, plasma display panel of the present invention comprises following assembly based on utilizing gas discharge to carry out the plasma display panel that picture image shows:
Can utilize switch to produce the multi-chip module of above-mentioned discharge drive signal;
In order to make multi-chip module produce above-mentioned drive signal, provide the power supply supplying module of power supply to above-mentioned multi-chip module;
Be used to discharge the fin of the heat that above-mentioned power supply supplying module produced;
Be used to detect the temperature of above-mentioned fin, and produce the temperature sensor of temperature data;
The temperature data of exporting in the sensor is responded, produced the feedback controller of the switch controlling signal be used to control above-mentioned switch.
Above-mentioned drive signal is exactly the discharge of keeping that is used to keep above-mentioned discharge.
The said temperature transducer is used to detect the temperature of above-mentioned fin high-temperature part.
Above-mentioned feedback controller has also comprised the switch data storage unit that the data according to the above-mentioned switch number of times of said temperature Data Control are stored.
Above-mentioned plasma display panel also comprises with lower device:
Be provided with the panel of the discharge cell that is used to carry out above-mentioned discharge;
Be arranged on above-mentioned back side of panel, and above-mentioned panel is supported, can also distribute the framework of the heat that above-mentioned panel produces;
Be arranged on the said frame, the printed circuit board (PCB) of above-mentioned multi-chip module, above-mentioned power supply supplying module and above-mentioned feedback controller has been installed.
For other purposes and the effect of the present invention except that above-mentioned purpose, describe with reference to accompanying drawing.
Effect of the present invention:
As mentioned above, plasma display panel of the present invention is provided with attached to temperature sensor that is used on the fin temperature is detected and the feedback controller the increase and decrease of keeping umber of pulse controlled according to the detected temperature of temperature sensor.Therefore, the variations in temperature that plasma display panel of the present invention can be when driving is regulated keeping umber of pulse, thereby has been reached the effect that reduces the plasma display panel temperature.
Therefore, plasma display panel of the present invention can prevent the bad phenomenon of drive circuit operation that rises and cause owing to excessive temperature from root, makes the plasma display panel can stable operation.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of the existing plasma display panel structure of simple displaying.
Fig. 2 is the schematic diagram that shows printed circuit board (PCB) multi-chip module and fin.
Fig. 3 is the schematic diagram that shows plasma display panel of the present invention.
Fig. 4 is the schematic diagram that the printed circuit board (PCB) in the accompanying drawing 3 is described in more detail.
Fig. 5 is the schematic diagram of simple displaying feedback circuit structure.
Fig. 6 is the schematic diagram that shows plasma panel electrode configuration of the present invention.
Fig. 7 is the schematic diagram that the discharge cell in the accompanying drawing 6 is described in more detail.
Fig. 8 is the schematic diagram that the picture that is used to drive plasma display panel of the present invention is described.
Fig. 9 is the schematic diagram that shows the drive waveforms be used to drive plasma display panel.
The symbol description of major part in the accompanying drawing:
2,52: front shell 4,54: panel
6,56: heat-dissipating casing 8,58: framework
10,60: printed circuit board (PCB) 12,62: back case
14: drive integrated circult 20,70: multi-chip module (MCM)
24,74: power supply supplying module (power supply supplying module) 26,76: fin
28,78: application-specific integrated circuit (ASIC) 80: temperature sensor
82: feedback controller 84: controller
86: data storage elements 90: discharge cell
112: transparency electrode 113: metal Bus electrode
114,122: dielectric layer 116: diaphragm
124: spaced walls 126: luminescent coating
Embodiment
Below with reference to Fig. 3 to Fig. 9, the embodiment of plasma display panel of the present invention is described in detail.
Fig. 3 is the schematic diagram that shows plasma display panel of the present invention.
As shown in Figure 3, plasma display panel of the present invention comprises front shell 52 and back case 62, panel 54, heat-dissipating casing 56, framework 58 and printed circuit board (PCB) 60.
Panel 54 is made of upper substrate 54a and lower basal plate 54b.Upper substrate 54a is provided with several scan electrodes and several keep electrode.Lower basal plate 54b comprises following assembly: with scan electrode and several addressing electrodes of keeping the cross-shaped attitude setting of electrode; Be arranged on the luminescent coating of lower basal plate upper surface.Utilize each scan electrode, keep the sharp luminescent coating of penetrating of the ultraviolet ray that when discharge, is produced between electrode and the addressing electrode, luminescent coating just can radiate visible rays like this, regulate the transmitance of visible rays then, so just can demonstrate the picture image seen for the user.For this reason, panel 54 must be provided with upper substrate 54a and lower basal plate 54b, also dielectric layer, diaphragm, luminescent coating and spaced walls will be set between upper substrate 54a and lower basal plate 54b.The inside of panel 54 has charged into when discharge can produce multiple inert gases such as ultraviolet neon (Ne), helium (He) and ne-He mixture body.
Framework (or being called heating panel) 58 is arranged on the back side of panel 54, has not only played support panel 54 effects, but also has when panel 54 drives the effect that can distribute the panel heat.In addition, also be provided with printed circuit board (PCB) (Printed Circuit Board:PCB) at the back side of framework 58, printed circuit board (PCB) is provided with various driver parts.Printed circuit board (PCB) can produce a large amount of heats when carrying out work, framework 58 can receive wherein a part of heat, then it is dispersed into the device outside.For this reason, framework 58 adopts heat conductivility preferred metal materials to make, so that distribute heat effectively.Here said heat conductivility preferred metal material mainly is the metal such as aluminium (Al).
Front shell 52 and back case 62 are separately positioned on the front and back of plasma display panel; be used to protect the inner element such as panel 54, heat-dissipating casing 56, framework 58 and printed circuit board (PCB) 60 of plasma display panel inside; make it not be subjected to the impact of external force and the pollution of external environment condition, and the noise that is produced when preventing to drive output to the outside.Front shell 52 has wrapped the non-display area of panel 54 and the sideway stance of plasma display panel, is provided with on the viewing area of panel 54 to be used to cover the viewing area, and the diaphragm of making by transparent material.On this diaphragm, also scribble the electromagnetic radiation protection layer.
Heat-dissipating casing 56 is inserted between panel 54 and the framework 58.The effect of heat-dissipating casing 56 is that the heat that panel 54 is produced when plasma display panel is driven is communicated to framework 58, by framework 58 heat is dispersed into the outside then, thereby the temperature that prevents panel 54 rises rapidly.For this reason, heat-dissipating casing 56 utilizes adhesive and panel 54 and framework 58 to be bonded together.
Be provided with the system circuit board that is used to drive plasma display panel on the printed circuit board (PCB) 60.In order to realize this structure, printed circuit board (PCB) is fixed on the back side of framework 58.System circuit board comprises and is used for to each scan electrode that is arranged on system circuit board and panel 54 and continuous several drive integrated circults (Driving Integrated Circuit:DIC) that send various data-signals and sweep signal of addressing electrode.In addition, system circuit board has also comprised power supplier, addressing (data) drive unit, scanning driving device and the system driving device that is used to provide data-signal and sweep signal.Drive integrated circult is made of turntable driving integrated circuit and data-driven integrated circuit, is arranged between printed circuit board (PCB) 60 and the panel 54, is used for the control signal that printed circuit board (PCB) 60 sends is responded, and provides drive signal to panel 54.For this reason, printed circuit board (PCB) 60 utilizes flexible printer circuit (Flexible Printed Circuit:FPC) to be connected with panel 54.Here, cover under brilliant film (Chip On Film:COF) the entrapped situation of mode in each drive integrated circult employing, one side of flexible printer circuit is connected with the integrated circuit (IC) chip of turntable driving integrated circuit and data-driven integrated circuit, and the opposite side of flexible printer circuit is connected with backing plate on being connected panel 54 each electrodes.
In addition, plasma display system of the present invention comprises with lower member:
Be arranged in the system circuit board multi-chip module 70 of printed circuit board (PCB) 60, be used to produce the custom integrated circuit (perhaps being called application-specific integrated circuit (ASIC)) 78 that plasma display panel moves necessary various control signals;
The power supply supplying module 74 that provides plasma display panel to move necessary various voltages is provided;
The heat that is produced when being used for 74 drivings of power supply supplying module is dispersed into outside fin 76;
Be used to measure temperature sensor 80 (see figure 4)s of fin 76 temperature;
The temperature measured according to temperature sensor 80, control application-specific integrated circuit (ASIC) 78 produces the feedback controller 82 of signals.
Fig. 4 is the schematic diagram that the printed circuit board (PCB) among Fig. 3 is shown in more detail.Fig. 5 is the schematic diagram of simple displaying feedback circuit structure.
Shown in accompanying drawing 4 and accompanying drawing 5, temperature sensor 80 is arranged on the fin 76, and side being provided with of multi-chip module 70 is used for from temperature sensor from reception temperature data (St) and produces the feedback controller 82 of control signal.
Application-specific integrated circuit (ASIC) 78 produces the various control signals that are used to drive above-mentioned plasma display panel.In the present invention, this control signal reduces exactly and keeps umber of pulse.
The driving method back also will be elaborated, and only do simple declaration here.
Plasma display panel is by addressing, the discharge cell that selection will be discharged, and utilize and keep pulse and keep and discharge the display frame image.Application-specific integrated circuit (ASIC) 78 can produce and be used for keeping the ON/OFF signal that pulse is controlled to this.Keep pulse and alternately be applied to scan electrode and keep electrode, and, determine to keep umber of pulse according to the gray scale that shows.Keep umber of pulse and in application-specific integrated circuit (ASIC) 78, generate, and be sent on the panel 54.Application-specific integrated circuit (ASIC) 78 is according to the switch controlling signal (Csw) that sends from feedback controller 82, and umber of pulse is kept in maintenance or minimizing, and with its output.Switch controlling signal (Csw) is controlled the switch of the switching device that is used to application-specific integrated circuit (ASIC) 78 is kept (accompanying drawing does not have sign), and keeps or reduce the umber of pulse of keeping that is produced.
Temperature sensor 80 is attached to a side of fin, temperature that can perception fin 76, and convert thereof into temperature data (St), offer feedback controller 82 then.Temperature sensor 80 is preferably disposed on the making progress upward of fin 76 (to being exactly top towards panel, Y direction just is meant the upper direction of panel upward, and Z-direction refers to the back side direction of panel).Why temperature sensor 80 will be arranged on the top of fin 76, is that the top of fin 76 is higher relatively than the temperature of bottom because test by the Temperature Distribution of fin 76.So for feedback controller 82 can be reacted rapidly, temperature sensor 80 should be arranged on the top of fin 76.
The temperature data (St) that 82 pairs of temperature sensors 80 of feedback controller send responds, and produces the switch controlling signal (Csw) that umber of pulse is controlled of keeping that is used for application-specific integrated circuit (ASIC) 78.
For this reason, feedback controller 82 comprises following element:
Can store the read-only memory data storage elements 86 such as (Read OnlyMemory:ROM) that is used for the corresponding data that compares with temperature data (St);
Be used for to be stored in the data of data storage elements 86 and the controller 84 that temperature data (St) compares.
Data storage elements 86 is storing the look-up table of determining according to test value (Look Up Table:LUT).Illustrate, suppose that the value of fin 76 is a benchmark with 30 ℃ of normal temperature, 5 ℃ of every risings, operational efficiency will descend 3%.In this case, the look-up table that is stored is as shown in table 1.
[table 1]
| Temperature | Keep pulse rate of descent (%) |
| 30℃ | 100％ |
| 35℃ | 97％ |
| 40℃ | 94％ |
| 45℃ | 91％ |
| More than 50 ℃ | 80％ |
If the temperature that temperature sensor 80 is measured is 45 ℃, controller 84 is just confirmed the corresponding pulse rate of descent of keeping of temperature with temperature sensor 80 mensuration from data storage elements 86.By this work, controller 84 will produce switch controlling signal (Csw), and the current umber of pulse of keeping is become and 45 ℃ of corresponding umber of pulses (i.e. original umber of pulse of keeping of 91%) of keeping.
The switch controlling signal (Csw) that is sent by feedback controller 82 is implemented switching device to keeping of application-specific integrated circuit (ASIC) 78 and is controlled, and keeps or reduce and keep umber of pulse.
Fig. 6 is the schematic diagram that shows plasma panel electrode configuration of the present invention.
Fig. 6 shows it is panel 54 among Fig. 3, and discharge cell 90 is made up of scanning electrode wire (Y1 to Ym), the crosspoint of keeping electrode wires (Z1 to Zm) and address electrode lines (being also referred to as data electrode wire, X1 to Xn).
Scanning electrode wire (Y1 to Ym) can provide scanning impulse and keep pulse, and making discharge cell 90 is that unit scans with the line, and makes discharge cell 90 keep discharge.
Keeping electrode wires (Z1 to Zm) provides simultaneously and keeps pulse, makes discharge cell 90 keep discharge with scanning electrode wire (Y1 to Ym).Address electrode lines (X1 to Xn) is that unit provides data pulse with the line with scanning impulse simultaneously, according to the theoretical value of data pulse, can select the discharge cell 90 that will keep discharge.
Fig. 7 is the schematic diagram that the discharge cell in the accompanying drawing 6 is described in more detail.What Fig. 7 showed is the discharge cell of 3 electrode AC creeping discharge type plasma display panels.
Shown in accompanying drawing 6 and accompanying drawing 7, the discharge cell of 3 electrode AC creeping discharge type plasma display panels is by being arranged on the scan electrode (Y) on the upper substrate 54a and keeping electrode (Z) and the addressing electrode (X) that is arranged on the lower basal plate 54b is formed.Each scan electrode (Y) and keep electrode (Z) and all comprised transparency electrode 112Y, 112Z and metal Bus electrode 113Y, 113Z.The wire spoke of metal Bus electrode 113Y, 113Z is littler than the wire spoke of transparency electrode 112Y, 112Z, is arranged on a lateral edges position of transparency electrode.
Transparency electrode 112Y, 112Z are made by tin indium oxide (Indium Tin Oxide:ITO), zinc oxide (Indium Zinc Oxide:IZO), tin zinc oxide metal oxides such as (Indium Tin Zinc Oxide:ITZO) usually, are arranged on the upper substrate 54a.Metal Bus electrode 113Y, 113Z are made by chromium metals such as (Cr) usually, are arranged on transparency electrode 112Y, the 112Z, have played the effect that reduces the voltage drop that caused by the very high transparency electrode 112Y of resistance, 112Z.Be arranged side by side scan electrode (Y) and kept on the upper substrate 54a of electrode (Z) and be provided with dielectric layer 114 and diaphragm 116.
Dielectric layer 114 damages that sputter causes take place when diaphragm 116 can prevent owing to plasma discharge, and can improve the efficient of emitting of 2 electronics.Diaphragm 116 adopts magnesium oxide (MgO) material to form usually.
The lower basal plate 54b that addressing electrode (X) is set includes lower dielectric layer 122, spaced walls 124.Lower dielectric layer 122 and spaced walls 124 surfaces scribble luminescent coating 126.The direction that direction and scan electrode (Y) is set and keeps electrode (Z) of addressing electrode (X) is intersected.
Accumulated the wall electric charge that forms discharge on upper dielectric layer 114 and the lower dielectric layer 122.Dielectric layer 114,122 and diaphragm 116 can reduce the discharge voltage that the outside applies.
Spaced walls 124 is combined with last/lower basal plate 54a, 54b and has just been formed discharge space.And spaced walls 124 is arranged side by side with addressing electrode (X), can prevent that ultraviolet ray and visible rays that gas discharge produces from leaking in the adjacent discharge cell.In the discharge space between last/lower basal plate 54a, 54b and spaced walls 124, charged into the combined discharge gas (being also referred to as mist) of inert gases such as He, the Ne that can carry out gas discharge, Ar, Xe, Kr, above-mentioned gas or can pass through the ultraviolet halogen of discharge generation (Excimer) gas.
Luminescent coating 126 is subjected to ultraviolet sharp the penetrating that plasma discharge produces, and can radiate any one color in redness (R), green (G) or the cyan colors such as (B).
Fig. 8 is the schematic diagram that the picture that is used to drive plasma display panel of the present invention is described; Fig. 9 is the schematic diagram that shows the drive waveforms be used to drive plasma display panel.
Shown in accompanying drawing 8 and accompanying drawing 9, plasma display panel is subdivided into the different subdomain of each number of times of giving out light with a picture and drives in order to embody the gray scale of picture image.Each subdomain is divided into the reseting period that is used for whole image is resetted again, select scan line and embody keeping of gray scale in the address period of selected scan line selected cell, according to discharge time during.
Reseting period is divided into (SU) between the rising stage that acclivity (Ramp) waveform (PR) is provided again and provides between the decrement phase of decline slope (Ramp) waveform (NR) (SD).Illustrate, wanting under the situation that picture image is shown with 256 gray scales, (16.67ms) as shown in Figure 3 during being equivalent to 1/60 second picture, 8 subdomains (Subfield) (SF1 to SF8) have been divided into, during 8 subdomains (Subfield) (SF1 to SF8) have been divided into reseting period, address period again respectively and keep.The reseting period of each subdomain (Subfield) is identical with address period.Being used for the address discharge that the unit that will discharge is selected is by causing as the voltage difference between the transparency electrode of X electrode and Y electrode.In each subdomain (Subfield), be 2 during keeping
2The ratio of (n=0,1,2,3,4,5,6,7) increases.
Plasma display panel has been divided into (AP) between the addressed area that is used to make the discharge cell 90 of whole image carry out the initialized interval that resets (RP), is used for the unit that will discharge is selected, be used for the elimination interval (EP) of keeping interval (SP) and being used for the wall electric charges in the discharge cell 90 that finishes discharge are removed that the discharge of selected discharge cell 90 is kept.
In (SU), all scan electrodes (Y1 to Ym) have been applied in positive taxis Ramp waveform (PR) between the rising stage of the reseting period (RP) of subdomain (SFn) beginning, keep electrode (Z) and addressing electrode (X) has been applied in 0[V] voltage.According to the positive taxis Ramp waveform (PR) of (SU) between the rising stage, the voltage on the scan electrode (Y1 to Ym) is kept voltage (Vs) beginning from positive pole and is risen to higher resetting voltage (Vr) gradually.Utilize positive taxis Ramp waveform (PR), carried out almost not having between scan electrode (Y1 to Ym) and the addressing electrode (X1 to Xn) dark discharge (Dark Discharge) of light in the discharge cell of whole image, simultaneously, at scan electrode (Y1 to Ym) with keep between the electrode (Z1 to Zm) and produced dark discharge.After having passed through this dark discharge, just (SU) finishes soon between the rising stage, and addressing electrode (X1 to Xn) and keep and just be left anodal wall electric charge on the electrode (Z1 to Zm) has been left negative pole wall electric charge on the scan electrode (Y1 to Ym).
At (SU) between the rising stage, between the decrement phase of reseting period (RP) in (SD) voltage keep voltage (Vs) from positive pole and drop to negative pole gradually and eliminate the negative taxis Ramp waveform (NR) of voltage (Ve) and be applied on the scan electrode (Y1 to Ym).Simultaneously, keep being applied in positive pole on the electrode (Z1 to Zm) and keeping voltage (Vs), be coupled with 0[V on the addressing electrode (X1 to Xn)] voltage.Utilize negative taxis Ramp waveform (NR), the discharge cell 90 of whole image has just produced dark discharge between scan electrode (Y1 to Ym) and addressing electrode (X1 to Xn), simultaneously, at scan electrode (Y1 to Ym) with keep and also carry out dark discharge between the electrode (Z1 to Zm).After the dark discharge of having passed through (SD) between decrement phase, the wall CHARGE DISTRIBUTION in each discharge cell 90 has just changed back to the initial state of addressing.At this moment, the scan electrode (Y1 to Ym) of each discharge cell 90 and addressing electrode (X1 to Xn) are gone up above the unwanted wall electric charge of address discharge and just have been eliminated the necessary wall electric charge of only remaining address discharge.And, keep just to have accumulated on the electrode (Z) and move the negative pole wall electric charge of coming from scan electrode (Y), like this, the polarity of keeping electrode (Z) has just become negative pole from positive pole.
In the address period (AP), (SCNP) be added to successively on the scan electrode (Y1 to Ym), (SCNP) synchronous, addressing electrode (X1 to Xn) has been coupled with data pulse (DP) to the scanning impulse of negative polarity with scanning impulse simultaneously.Scanning impulse (voltage SCNP) is exactly from 0[V] voltage or the negative pole approaching with it scanning BIAS voltage (Vyb) drops to negative pole scanning voltage (scanning voltage Vy) (Vsc).The voltage of data pulse (DP) is exactly anodal data voltage (Va).In address period (AP), keep that electrode (Z1 to Zm) has been coupled with that positive pole is kept voltage (Vs) or than its lower anodal BIAS voltage.Be coupled with in the whole discharge cell (On-Cells) of scanning voltage (Vsc) and data voltage (Va), between scan electrode (Y1 to Ym) and addressing electrode (X1 to Xn), just produced address discharge.
During keeping in (SP), the pulse (SUSP) of keeping that positive pole is kept voltage (Vs) just alternately is added to scan electrode (Y1 to Ym) and is kept above the electrode (Z1 to Zm).Utilize the selecteed whole discharge cell of address discharge to keep pulse (SUSP) so, will at scan electrode (Y1 to Ym) and keep to produce between the electrode (Z1 to Zm) and keep discharge according to each.On the contrary, whole discharge cell (Off-Cells) in (SP), just can not discharge during keeping.
In the elimination interval (EP) of subdomain (SFn), keep electrode (Z) and be coupled with elimination Ramp waveform (ERR).In (EP), scan electrode (Y1 to Ym) and addressing electrode (X1 to Xn) have been coupled with 0[V during eliminating] voltage.Eliminating Ramp waveform (ERR) is exactly that voltage is from 0[V] voltage rises to the Ramp waveform that positive pole is kept voltage (Vs) gradually.Utilize to eliminate Ramp waveform (ERR), at the scan electrode (Y1 to Ym) of the whole discharge cell of keeping discharge with keep just to have produced between the electrode (Z1 to Zm) to eliminate and discharge.By eliminating discharge, the wall electric charge in the whole discharge cell just has been eliminated.
As mentioned above, plasma display panel has produced with the display gray scale corresponding maintenance and has discharged for the display frame image.From the whole process of plasma display panel operation, under the situation of high gray scale, the temperature of plasma display panel rises very serious, and this is than address discharge with eliminate the much more discharge institute that keeps of discharge and caused by discharge time.Keep discharge in order to embody gray scale, rely on fully and keep discharge time, so the present invention by reducing discharge time, has just reached containment plasma display panel temperature and risen.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (5)
1, a kind of plasma display panel is based on and utilizes gas discharge to carry out the plasma display panel that picture image shows, it is characterized in that comprising:
Can utilize switch to produce the multi-chip module of above-mentioned discharge drive signal;
In order to make the rising multi-chip module produce above-mentioned drive signal, provide the power supply supplying module of power supply to above-mentioned multi-chip module;
Be used to discharge the fin of the heat that above-mentioned power supply supplying module produced;
Be used to detect the temperature of above-mentioned fin, and produce the temperature sensor of temperature data;
The temperature data of exporting in the said temperature transducer is responded, produced the feedback controller of the switch controlling signal be used to control above-mentioned switch.
2, plasma display panel as claimed in claim 1 is characterized in that:
Above-mentioned drive signal is exactly the signal of keeping discharge that is used to keep above-mentioned discharge.
3, plasma display panel as claimed in claim 1 is characterized in that:
The said temperature transducer is used to detect the temperature of above-mentioned fin high-temperature part.
4, plasma display panel as claimed in claim 2 is characterized in that:
Above-mentioned feedback controller has also comprised the switch data storage unit that the data according to the above-mentioned switch number of times of said temperature Data Control are stored.
5, plasma display panel as claimed in claim 1 is characterized in that also comprising:
Be provided with the panel of the discharge cell that is used to discharge;
Be arranged on above-mentioned back side of panel, and above-mentioned panel is supported, can also distribute the framework of the heat that above-mentioned panel produces;
Be arranged on the said frame, the printed circuit board (PCB) of above-mentioned multi-chip module, above-mentioned power supply supplying module and above-mentioned feedback controller is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101108118A CN1971826A (en) | 2005-11-25 | 2005-11-25 | Plasma display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101108118A CN1971826A (en) | 2005-11-25 | 2005-11-25 | Plasma display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1971826A true CN1971826A (en) | 2007-05-30 |
Family
ID=38112564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101108118A Pending CN1971826A (en) | 2005-11-25 | 2005-11-25 | Plasma display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1971826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304435A (en) * | 2015-10-25 | 2016-02-03 | 梁寿禄 | Plasma display panel rear plate |
-
2005
- 2005-11-25 CN CNA2005101108118A patent/CN1971826A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105304435A (en) * | 2015-10-25 | 2016-02-03 | 梁寿禄 | Plasma display panel rear plate |
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