JPH01197940A - Plasma display device - Google Patents

Abstract

PURPOSE:To make a device small-sized and reduce the cost by pinching a plasma luminous layer between a transparent substrate and a back dielectric substrate and forming and displaying an electrostatic image on a principal plane on the side not in contact with the plasma luminous layer of the back dielectric substrate with a writing electrode controlling the flow of ions. CONSTITUTION:A plasma panel made by pinching a plasma luminous layer 4 between a transparent substrate 1 forming a transparent electrode 2 and a dielectric substrate 3 with no electrode is used, ions are selectively electrified on the dielectric substrate 3 by a writing electrode 5 to obtain an electrostatic image. The electric field is generated between the electrified portion of ions and the transparent electrode 2, no electric field is generated on the portion not electrified with ions, the presence of luminance is different, the plasma display can be realized for the electrostatic image. A writing electrode constituted of a corona ion generator and a control electrode 8 controlling the flow of ions can be used for the writing electrode 5. Only one electrode applying the potential to the transparent electrode 2 is sufficient for the extracting electrode from the display panel. The device can be thereby made small-sized, and the cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plasma display device used as an image display device.

(Prior Art) Segment type plasma display devices used in watches, calculators, etc., and X-Y matrix type plasma display devices used for large-capacity displays, etc., are being considered.

(Problems to be solved by the invention) With the X-Y matrix type, as the display becomes larger in capacity and higher in density, the number of terminal electrodes increases and connection with peripheral circuits due to higher density becomes difficult, and expensive There was good luck, such as an increase in the amount of driver IC usage.

The present invention can provide a plasma display device that can be made smaller and lower in cost.

(Means for solving the problems) The present invention will be explained below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and the feature of the present invention is that a plasma emitting layer 4 is provided between a transparent substrate 1 on which a transparent electrode 2 is formed and a dielectric substrate 3 without an electrode. The point is that it uses sandwiched plasma panels. Ion charging is used to form the electric field applied to the plasma emitting layer. That is, the write It electrode 5 selectively charges ions onto the dielectric substrate 3 to obtain an electrostatic image. Between the charged part of the ions and the transparent electrode 2'
An electric field is generated, and the portions where the ions are not charged do not generate an electric field, so the presence or absence of light emission is different, and a plasma display corresponding to an electrostatic image can be realized. As a write electrode, for example, JP-A-62
A writing electrode consisting of a corona ion generator and a control electrode for controlling the flow of the ions as shown in Japanese Patent No. 34187 can be used.

An example is shown in FIG. A positive or negative voltage of about 3 to 10 KV is applied to the gold-plated tungsten wire 7 having a diameter of 40 to 120 μm to generate corona ions. The passage of these ions is controlled by the control electrode 8. The control electrode 8 is configured such that an upper electrode 8a and a lower electrode 8b are arranged at a predetermined interval, and a corona ion flow can pass through a through hole provided in the center. Next, the operation will be explained.

As shown in FIG. 2(a), when the control power source 10 is applied so that the upper electrode 8a is positive and the lower electrode is negative, the electric field changes in order.
Corona ions pass through. Conversely, if the control power source 10 is applied with the opposite polarity as shown in FIG. 2(b), corona ions cannot pass through. Note that ll is a bias power supply. Erasing is performed using corona ions of opposite polarity.

(Effects of the invention) The number of electrodes taken out from the display panel is only one, which applies the electric potential to the transparent electrode.The number of expensive driver ICs is less than half of the conventional one, which is equal to the number of pixels on the X side or Y side. This makes it possible to significantly reduce costs, including assembly and mounting costs.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing one embodiment of the present invention, Figure 2 (a)
, (b) is a circuit diagram illustrating an embodiment of the write electrode and its operating principle. Explanation of symbols

Claims (1)

[Claims] 1. A plasma light-emitting layer is sandwiched between a transparent substrate on which a transparent electrode is formed and a back dielectric substrate, and the flow of ions is controlled on the main surface of the back dielectric substrate on the side not in contact with the plasma light-emitting layer. A plasma display device characterized in that it is configured to form an electrostatic image and perform display using a write electrode that forms an electrostatic image.