Driving method of grooved plasma body metal net plate electrode during initialization
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A metal mesh, plasma technology, used in cold cathode tubes, instruments, static indicators, etc., can solve the problems of display instability, unstable addressing discharge, screen flicker, and discharge delay.
Inactive Publication Date: 2008-09-24
NANJING HUAXIAN HIGH TECH CO LTD
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[0007] The present invention is aimed at the problems of unstable display and screen flicker in the existing driving method, and invents a new driving method, which can give the original in the floating position according to the waveform of the scanning electrode in the initialization period during the initialization period. A voltage control signal for the state of the metal mesh plate electrode can suppress the misdischarge of the wall charges that cannot be erased during the maintenance period, and solve the problems of discharge delay in the addressing cycle, unstable addressing discharge and screen flickering.
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example 1
[0105] In the driving method of Example 1, the waveform diagram of the pulses applied to the electrodes during the initialization period is as follows Figure 6 shown.
[0106] exist Figure 5 In the description, the sweep voltage V SCN Parts A2 and A6 in and part B3 of the metal grid plate electrode voltage Vs all take ramp-like waveforms, and in this example 1, such as Figure 6 As shown, the corresponding parts are exponential function waveforms. Except for the voltage waveforms of the above-mentioned parts A2, A6 and B3 during the initialization period, the voltage waveforms of other parts are the same as the above-mentioned Figure 5 The corresponding part in is the same.
[0107] With this driving method, the wall charge is accumulated by adding the voltage of A8 and A9, and the initialization time is shortened by using A1 and A4, that is, the combined waveform of the two waveforms is used as the initialization pulse, and the initialization time Will not lengthen, a...
example 2
[0113] Figure 7 is a waveform diagram of pulses applied to each electrode during initialization in Example 2.
[0114] Such as Figure 7 As shown, the waveform of the applied voltage in Example 2 is characterized in that the intervals that originally used the exponential function waveform in the above-mentioned Variation 1 are changed to a combined waveform composed of a plurality of ramp-shaped waveforms.
[0115] During the period from time t0 to t2, the scanning voltage V SCN The waveform of is composed of two ramp-like waveforms. That is, the period from time t0 to t7 is ramp-shaped waveform 1 (part A10), and the period from time t7 to t2 is ramp-shaped waveform 2 (part A11). In addition, at time t7, there is no gap between waveform 1 and waveform 2 .
[0116] The maximum value of the voltage change rate of the two ramp-shaped waveforms is set below 10V / μsec. As in the above case, this is also to prevent misdischarge.
[0117] Similarly, the scanning voltage VSCN fro...
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Abstract
The invention relates to a drive method of an electrode of a groove type plasma metal screen plate during initializing period; when a groove type plasma scanning electrode comes into the initializing period, a drive circuit exerts a voltage controlled waveform on the electrode of the metal screen plate so as to guarantee that the electrode of the metal screen plate does not produce a weak discharging process against the scanning electrode and an addressing electrode during the weak discharging process produced between the scanning electrode and the addressing electrode in a first half of the initializing period; and in the first part and the rear part of the initializing period, the constant voltage controlled waveform exerted by the drive circuit on electrode of the metal screen plate is utilized to lead the scanning electrode and the electrode of the metal screen plate to generate the weak discharge; a positive wall charge on the surface of a dielectric layer on the addressing electrode is kept unchanged so as to guarantee that the positive wall charge accumulated on the surface of the dielectric layer on the addressing electrode approximates to the positive wall charge starting up a voltage level, thereby being helpful to improve the addressing speed, reduce the luminance of back side, improve the consistency of the addressing of the entire screen, reduce the occurrence of a wrong discharging and increase the contrast ratio of a SMPDP greatly.
Description
technical field [0001] The invention relates to a driving method applied to a groove type plasma display. Specifically, it is a driving method of a slot-type plasma display panel which can avoid misfire and improve contrast. Background technique [0002] The plasma flat panel display (PDP), which emerged in the early 1990s, has attracted widespread attention for its advantages of digitization, large screen, high resolution, high definition, wide viewing angle, thin thickness and light weight. [0003] Slot Plasma Display Panel (SMPDP) is a new type of display device that has developed rapidly in recent years. It adopts a two-electrode structure, which are scanning electrodes (SCN electrodes) on the front substrate and address electrodes on the rear substrate. (D electrode) AC phase discharge mode. During the driving process of the groove type plasma display panel, the SCN electrode and the D electrode are perpendicular to each other. In order to solve the problem that the...
Claims
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