| 摘要 |
It is sought to improve the image contrast of plasma panel type display screens. A plasma panel comprises a front plate (D1) bearing photoluminescent elements (LB1, LV1) constituted by grains (GL1, GLn) of luminophor material. According to one characteristic, the grains (GL1, GLn) have a diameter of less than 1.5 micrometer. This, in relation to the prior art, constitutes a substantial reduction of the diameter of the luminophor grains, which leads to reducing the coefficient of reflectance, the result of which is an improvement of the contrast of the image.
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