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Plasma display device and drive method

A technology of display equipment and driving method, applied in static indicators, instruments, etc., can solve problems such as shutdown, crash, discharge unit rise, etc., and achieve great economic value and remarkable effect.

Inactive Publication Date: 2014-06-11
SICHUAN COC DISPLAY DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The switching between images on the PDP display screen is transitioned through a black screen. When the black transition screen ends, the waveform driver of the display screen starts, and a color image visible to the naked eye appears. However, the color images displayed by the PDP are not required by all discharge units. glowing, there is always some or even more black background image
With the development of PDP technology, high energy efficiency and low power consumption are the general trend. Increasing the Xe gas content in the penning device gas is a method often used in the PDP field, and the side effect is also obvious, that is, the ignition voltage (Vf) of the discharge cell increases. , the performance is that when the black background images are switched to each other, there is an objective fact that the discharge delay of the discharge cells increases, that is, some discharge cells cannot emit light immediately, and it takes a delay for a period of time to return to the normal light-emitting state, and in a short period of time The low discharge that occurs seriously affects the display effect of color images
[0004] In order to solve the problem of low discharge after switching between PDP black background screens, the method of increasing the maintenance voltage (Vs) is usually used, but the adjustment range and effect are limited. If the adjustment exceeds the rated value, it is likely to cause circuit board failure. In order to improve the reliability of PDP products, in order to improve the reliability of PDP products, try to avoid adjusting the parameters of the PCB board for problems such as crashes and shutdowns

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Design concept: On the basis of the original PDP Y electrode driving waveform, the highest voltage of the waveform Ramp-up phase of the first subfield reset period of the first frame is increased.

[0023] Basic principle: Increase the voltage of the Ramp-up stage, that is, further strengthen the weak dark discharge intensity of the discharge unit, and obtain more negative wall charge accumulation on the Y electrode (the A and X electrode dielectric layers accumulate positive charges), and at the same time Offset the continuous increase of external voltage and keep the discharge cell at the ignition voltage (the so-called ignition voltage is the minimum driving voltage for driving the discharge cell (3 discharge cells equals one pixel)) state, so that the subsequent discharge can be based on a consistent state get on.

[0024] figure 2 Shown are two-stage waveform diagrams of the driving waveforms Ramp-up and Ramp-down of the plasma display device according to the first emb...

Embodiment 2

[0027] Design concept: On the basis of the original PDP Y electrode driving waveform, the lowest voltage of the waveform Ramp-down during the reset period of the first subfield of the first frame is reduced.

[0028] Basic principle: Decrease the voltage of the Ramp-down stage, which actually increases the Ramp-down voltage, and the voltage direction is negative. Due to the accumulation of enough wall charges in the Ramp-up stage, the erasing discharge capacity is enhanced during the slow decline of Ramp-down. All discharge cells generate erasing discharge to erase the wall charges and enough generated in the Ramp-up stage. A large amount of space ions will form uniform residual wall charges that can stably generate address discharge, thereby reducing the ignition voltage of the discharge cell and eliminating the discharge delay.

[0029] The amount of voltage drop in the ramp-down stage varies according to the actual situation.

[0030] This embodiment can be used in combination wi...

Embodiment 3

[0032] Design concept: A voltage is superimposed on the basis of the Ramp-down phase of the reset period of the first subfield of the first frame and the X_shelf reference voltage of the address period ( Figure 4 ).

[0033] Basic principle: On the basis of not changing the PDP Y electrode driving waveform, superimpose an X_shelf voltage on the original X_shelf voltage for the Ramp-down and address period to increase the discharge intensity between the Y electrode and the X electrode, and make the surface of the electrode dielectric layer Accumulate enough wall charges and generate enough space ions, so as to reduce the ignition voltage of the discharge unit to avoid discharge delay, and completely eliminate the low discharge failure after switching between black background pictures. Its purpose is to reduce the voltage of the discharge unit Vf and eliminate the discharge delay.

[0034] The voltage superimposed on the basis of the reference X_shelf voltage varies according to th...

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Abstract

The invention discloses a plasma display device and a drive method. The plasma display device comprises a scanning electrode, an addressing electrode, a maintaining electrode and a driver used for exerting drive waveforms. The driver exerts the following drive waveforms that in one sub-field, on the basis of a slow-descending step-shaped waveform zone in a drive waveform reset period stage and an addressing period X_shelf reference voltage, a voltage is superimposed. Under the condition that PCB parameters are not adjusted, the problem of low discharge after PDP black background pictures are mutually switched is solved, effects are obvious, it is ensured that a product is not affected, and extremely large economic value is achieved.

Description

Technical field [0001] This application belongs to the technical field of PDP (plasma display) driving waveforms, and in particular relates to a plasma display device and a driving method. Background technique [0002] The current PDP driving method mainly adopts the method of addressing and displaying separation, and the driving waveform of one frame of picture includes 10 subfields. Each subfield includes a reset period, an address period and a sustain period. [0003] The switching between the PDP display images is transitioned by the black screen. When the black transition screen ends, the waveform driver of the display screen starts, and a color image that is visible to the naked eye appears. However, the color image displayed by the PDP is not required for all discharge cells. Glowing, there are always some or more black background images. With the development of PDP technology, high energy efficiency and low power consumption are a major trend. Increasing the Xe gas conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/293G09G3/294G09G3/291
Inventor 卫伟陈富贵杨发明周超陈修强柳希武
Owner SICHUAN COC DISPLAY DEVICES
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