The present invention relates to plasma display and in particular to an AC plasma display panel.
A plasma display panel (PDP) is a thin type display, typically with a large viewing area. The luminescent principle of the PDP is the same as that of fluorescent lamps, wherein a vacuum space is filled with inert gas, and when a voltage is applied to the vacuum space, plasma is generated and radiates ultraviolet (UV) rays. The fluorescent material coated on the wall of the glass trough adsorbs the UV rays, hence the fluorescent material radiates visible light including red, green and blue light. A plasma display can be described as a combination of hundreds of thousands of illuminating units, each illuminating unit has three subunits for radiating red, green and blue light, respectively. Images are displayed by mixing these three primary colors.
As shown in
The lower glass substrate 14 has a plurality of barrier ribs 28, parallel and spaced by a predetermined distance dividing the discharge space 16 into a plurality of groups of sub-discharge spaces. Each group of sub-discharge spaces includes a red discharge space 16R, a green discharge space 16G, and a blue discharge space 16B. Additionally, the lower glass substrate 14 has a plurality of lengthwise electrodes 22 disposed parallel between two adjacent barrier ribs 28 serving as address electrodes. A red fluorescent layer 29R, a green fluorescent layer 29G, and a blue fluorescent layer 29B are respectively coated on the lower glass substrate 14 and the sidewalls of the barrier ribs 28 within each red discharge space 16R, each green discharge space 16G, and each blue discharge space 16B.
When voltage is applied to drive the electrodes, the inert gas in the discharge space 16 is discharged to produce UV rays. The UV rays further illuminate the fluorescent layers 29R, 29G, 29B to radiate visible light including red, green and blue light. After the three primary colors are mixed at different ratios, visible images are formed and transmitted through the upper glass substrate 12.
U.S. Pat. No. 6,376,987 discloses a display panel comprising a pair of row electrodes extending in parallel in a first direction, a discharge gap formed between the pair of row electrodes, and a column electrode extending in a second direction. Each of the row electrodes comprises a first conductive layer having a body portion and a projecting portion. The projecting portion comprises an end portion, and extends from the body portion away from the discharge gap towards said end portion. If row electrodes are broken, point defects are generated and thus decrease the yield.
Embodiments of the invention provide an AC plasma display panel. A front substrate is opposite a rear substrate. A plurality of ribs are interposed therebetween, defining a plurality of sub-pixels. The front substrate comprises a plurality of sustain electrodes, extending along a first direction, each comprising a auxiliary electrode, a plurality of extending electrodes extending from the auxiliary electrode and sticking into the corresponding sub-pixels, and a plurality of connecting electrodes, connecting adjacent extending electrodes.
The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
In embodiments of the invention, each of sustain electrodes structures comprises a conductive auxiliary electrode, transparent extending electrodes and connecting electrode, each of which connects two adjacent extending electrodes.
As shown in
Referring to
The sustain electrode comprises the auxiliary electrode 310, a plurality of extending electrodes extending 312 from the auxiliary electrode 310, and at least one connecting electrode 314 connecting two adjacent extending electrodes 312. The connecting electrodes 314 are preferably transparent conductive materials, such as ITO, and have a thickness of 0.1 μm˜45 μm. As illustrated in
The connecting electrode 314 can connect two adjacent extending electrodes 312, belonging to a sustain electrode and extending along the same direction, at any position. Referring to
The extending electrodes can be any shape, such as rectangle, round or T-shaped. In
In
In this embodiment, the ribs, connecting electrodes and extending electrodes are the same as that in the first embodiment, only the auxiliary electrode structure differs.
As shown in
A front substrate 804 disposed over the rear substrate 800 comprises a plurality of parallel auxiliary electrodes 910 disposed on the front substrate 804 extending in the direction X. A plurality of T-shaped extending electrodes 912 extend in direction Y from the corresponding auxiliary electrodes 910, sticking into corresponding sub-pixels 908. While extending electrodes 912 are T-shaped in this embodiment, they can be any shape.
A sustain electrode comprises a auxiliary electrode 910, a plurality of extending electrodes 912 extending therefrom and a plurality of connecting electrodes 914, each of which connects two adjacent extending electrodes 912. In addition, one auxiliary electrode 910 further comprises a plurality of extending portions 916, extending along the column ribs 906.
As illustrated in
The extending electrodes 912 are T-shaped in
While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
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93105500 A | Mar 2004 | TW | national |
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Number | Date | Country | |
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20050194902 A1 | Sep 2005 | US |