Plasma display panel

#1. Field of the Invention

#The present invention relates to a plasma display panel capable of color displaying, particularly to a plasma display panel which can perform color displaying and allow an improved visibility.

#The present application claims priority from Japanese Application No. 2001-111228, the disclosure of which is incorporated herein by reference for all purposes.

#These and other objects and advantages of the present invention will become clear from the following description with reference to the accompanying drawings, wherein:

#FIG. 1 is a cross sectional view showing a plasma display panel formed according to an embodiment of the present invention.

#FIG. 2 is a graph showing optical characteristics of the plasma display panel formed according to the embodiment of the present invention, indicating the light emission characteristics (relative intensities) of the respective discharge cells as well as the light transmittance of an optical filter associated with the display panel.

#FIG. 1 is a cross sectional view showing a plasma display panel formed according to an embodiment of the present invention. In the drawing, reference numeral 1 is used to represent a front glass substrate and reference numeral 2 is used to represent a rear glass substrate. On the inner surface of the front glass substrate 1 there are formed a plurality of row electrodes 10, a dielectric layer 11 covering the row electrodes 10, and a protection layer 12 for protecting the dielectric layer 11. On the inner surface of the rear glass substrate 2 disposed opposite to the front glass substrate 1, there are formed a plurality of column electrodes 20, and an electrode protection layer 21 covering the column electrodes 20. A plurality of stripe-like partition walls 22 are provided on the electrode protection layer 21, with each column electrode 20 interposed between adjacent two stripe-like partition walls 22. Fluorescent layers 23R for emitting red light, fluorescent layers 23G for emitting green light and fluorescent layers 23B for emitting blue light are disposed at a predetermined interval on the inner sides of respective discharge cells formed by the partition walls 22. The front glass substrate 1 and the rear glass substrate 2 are arranged to face each other, with an electric discharge space 3 formed therebetween. In fact, the discharge space 3 is divided by the partition walls 22 into a plurality of smaller spaces. In this way, a plurality of discharge cells are formed on the intersections of the row electrodes 10 with the column electrodes 20.

#Here, the front glass substrate 1 and the rear glass substrate 2 are bonded together along their edge portions with a seal layer interposed between the edge portions and with the discharge space 3 formed between the two glass substrates. Then, a discharge gas mainly containing neon gas and xenon gas is sealed into the discharge space 3 for use within the display panel. In this way, during an electric discharge, an ultraviolet ray emitted from the neon gas will cause the excitation of the respective fluorescent layers 23R, 23G and 23B, rendering the fluorescent layers to emit visible light rays of various colors. The emitted light rays are then allowed to emit outwardly through the front glass substrate 1, thus enabling a human being to recognize these light rays.

#Furthermore, an optical filter 4 is provided over the entire surface of the front glass substrate. Such an optical filter 4 is formed by a substrate material having a predetermined light transmittance and containing a pigment having a predetermined specific light absorbability.