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US 6,476,561 B2Granted
Gas discharge display device with superior picture quality
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTaku Okada
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTaku Okada
Estimating the term…
To provide a gas discharge display device that can perform stable write operations for a gas discharge panel and thereby display images with superior quality. A base pulse is applied throughout a write period. The base pulse gradually varies with an approximately constant slope (an average slope of 10V/μsec or less), during an introduction part Ia (i.e. from when the leading edge of the base pulse starts until immediately before the base pulse reaches a constant base voltage Vb) of the write period. A scan pulse Psco is not applied in the introduction part Ia, but is applied after the base pulse reaches the base voltage Vb.
A gas discharge display device comprising:
A gas discharge display device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
By time modulation using two or more time intervals: using sub-frames
For reset discharge, priming discharge or erase discharge occurring in a phase other than addressing: details of initialising
Controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes: for address discharge
Using AC panels: driving circuits for producing the waveforms applied to the driving electrodes
Term ended 2 Aug 2021 (estimated)
This application is based on application No. H12-236231 filed in Japan, the content of which is hereby incorporated by reference.
1. Field of the Invention
The present invention relates to a gas discharge display device used for image display for computers, televisions, and the like, and in particular to a surface discharge AC plasma display panel.
These and other objects, advantages and features of the invention will become apparent from the following description thereof taken in conjunction with the accompanying drawings which illustrate specific embodiments of the invention.
In the drawings:
FIG. 1 is a perspective view showing a rough construction of a surface discharge AC PDP to which the embodiments of the invention relate;
The following describes embodiments of a gas discharge display device of the present invention, by referring to the drawings. The gas discharge display device of the invention is equipped with a gas discharge PDP and a drive device for driving the PDP.
FIG. 1 is a perspective view showing a rough construction of a surface discharge AC PDP to which the embodiments of the invention relate.
Scan electrodes SC1-SCn and sustain electrodes SU1-SUn, a dielectric layer 13, and a protective layer 14 are formed on a front glass substrate 11, thereby forming a front panel 10. Also, address electrodes A1-Am and a dielectric layer 23 are formed on a back glass substrate 21, thereby forming a back panel 20. The front panel 10 and the back panel 20 are arranged in parallel to each other with a gap in between, so that the scan and sustain electrodes face the address electrodes. The gap between the front panel 10 and the back panel 20 is partitioned by barrier ribs RIB in the form of stripes, to form discharge spaces 40. Discharge gas is enclosed in these discharge spaces 40.