Method for driving plasma display screen
A technology of plasma display screen and display unit, which is applied to static indicators, instruments, etc., can solve the problems of reducing the holding discharge pulse, insufficient improvement of light emission efficiency, and reducing the starting voltage of discharge, etc.
Inactive Publication Date: 2002-09-11
HITACHI LTD
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Problems solved by technology
If the discharge does not occur when the sustain discharge pulse is applied several times at the beginning of the sustain discharge period, some non-light-emitting cells adjacent to the light-emitting cells are caused by, for example, charged particles flying over from the adjacent light-emitting cells. The starting (priming) effect reduces the discharge initiation voltage, and may emit light after repeated sustain discharges, resulting in false display
[0009] In addition, if the voltage of the sustaining discharge pulse is lowered, there arises a problem that the sustaining discharge cannot be continued due to the small amount of charges moving between the electrodes during the sustaining discharge and the discharge is terminated halfway.
[0010] From the above reasons, it is difficult to sufficiently reduce the width of the sustain discharge pulse and lower the voltage of the sustain discharge pulse, and therefore, the improvement of the light emission efficiency is insufficient.
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[0033] figure 1 is a schematic diagram showing a rough structure of the plasma display in the first embodiment of the present invention. On the display screen 10, the first electrode 1 and the second electrode 2 are formed in parallel, and the third electrode 3 is formed orthogonally to them. The first electrode and the second electrode are electrodes for sustain discharge mainly for light emission for display, and the first electrode is referred to as an X electrode and the second electrode as a Y electrode here. Sustaining discharges are caused to occur by repeatedly applying voltage pulses between the X electrodes and the Y electrodes. Also, any electrode works as a scan electrode to write display data (in this example, the Y electrode is a scan electrode), the third electrode is an electrode for selecting display cells that will emit light in each display line, and a voltage is applied to the first One electrode or between the second electrode and the third electrode to ...
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A method of driving a plasma display panel with further improved light emission efficiency, high brightness and low power consumption is disclosed. In this method, when the addressing period is completed, wall charges having a polarity opposite to that of the wall charges in the light-emitting cell remain on the first and second electrodes in the non-light-emitting cell, and the sustain discharge pulse of the opposite polarity There is a first sustaining discharge pulse with a first polarity and a second sustaining discharge pulse with a polarity opposite to the first polarity, and the first and second sustaining discharge pulses superimposed with the voltage of the remaining wall charges in the non-light-emitting cell are set. The voltage of the discharge pulse is maintained so that the superposition result is lower than the discharge initiation voltage.
Description
technical field [0001] The invention relates to a method for driving a plasma display screen. In more detail, the present invention relates to a technique for improving light emission efficiency of a plasma display panel. Background technique [0002] A plasma display is a device in which a space about 100 μm wide between two glass substrates on which electrodes are formed is filled with a mixed gas such as Ne and Xe for discharge, and between the two electrodes Apply a voltage higher than the discharge start voltage to cause discharge to occur, and the fluorescent material formed on the substrate is excited by the ultraviolet rays generated by the discharge to emit light, so that due to its advantages in display area, display capability, responsiveness, etc. Instead, it is expected to be a display device capable of realizing a large-sized full-color display. Also, a 40 to 60 inch direct view type plasma display screen has been made. Such a large size has not been made in...
Claims
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IPC IPC(8): G09G3/20G09G3/288G09G3/291G09G3/292G09G3/293G09G3/294G09G3/298
CPCG09G3/2927G09G3/2932G09G3/2942G09G2310/066G09G2320/0228G09G3/296G09G3/294
Inventor 金泽义一
Owner HITACHI LTD