Patent Grant
6972527
This application claims the priority benefit of Taiwan application serial no. 92122814, filed on Aug. 20, 2003, the full disclosure of which is incorporated herein by reference.
1. Field of the Invention
This invention generally relates to an alternating current plasma display panel (AC PDP), and more particularly to an alternating current plasma display panel using a common data electrode to effectively improve the display result due to the difference of the total capacitance and to eliminate the flicker effect.
2. Description of Related Art
Flat panel displays are the interface between the users and the data process systems. Currently, flat panel displays include three major categories: plasma displays, organic electro-luminescent displays (OELD), liquid crystal displays (LCD), and light emitting diodes (LED). Plasma displays would probably become the main stream in flat panel displays in the near future because of its large-size, self-light-emitting, non-viewing-angle dependent, lightweight, and full-color features.
A plasma display is a display device using phosphor material. After being exposed to an ultraviolet light, the phosphor material will emit the visible light for display. The light emitting structure includes a pair of electrodes, a discharging gas, and a phosphor material layer. When the voltage between the anode and the cathode reaches the threshold voltage, the discharging gas will discharge to emit the ultraviolet light. The phosphor material layer, after being exposed to the ultraviolet light, will enter into the excited state. In the process of returning to the ground state, the visible light of various colors is emitted based on the materials characteristics.
The first phosphor layer 142a is disposed in the first pixel area 140a; the second phosphor layer 142ba is disposed in the second pixel area 140b; the third phosphor layer 142c is disposed in the third pixel area 140c. Hence, the first, second, and third phosphor layers 142a, 142b, and 142c emit different visible lights respectively. These phosphor layers are disposed on the sidewall of the barrier rib 120 and on the exposed dielectric layer 115. Each data electrode has a pixel area having the same phosphor material along the X-axis direction.
A plurality of row electrodes 160 and a protective layer 170 are disposed on the bottom surface of the top substrate 150. Each row electrode 160 includes a bus electrode 162 and a sustain electrode 164. The bus electrode 162 is disposed at the top of the barrier rib 120 along the Y-axis direction. The sustain electrode 164 extends a wing-like configuration to the two sides of the bus electrode 162. The protective layer 170 is disposed on the bottom surface of the top substrate 150 and covers the row electrodes 160 to protect the sustain electrode 164 from damage.
Because of the material difference of the phosphor layers, each data electrode has a different capacitance. Hence, while driving the pixel area of the different data lines, and the pixel area has the same material for the phosphor layers, the display result may be different, for example, different driving voltages and different brightness. Flicker effect and lines with different brightness are thereby resulted.
An object of the present invention is to provide an alternating current plasma display panel using a common data electrode to effectively reduce the amount of the data driving chips and to improve the flicker effect of the pixel areas.
The present invention provides an alternating current plasma display panel, comprising a plurality of pixels, a plurality of common data electrodes, and a plurality of row electrodes, each of the plurality of pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged in a delta configuration, the first sub-pixel, the second sub-pixel, and the third sub-pixel being for emitting red, green, and blue visible lights respectively, the plurality of common electrodes being disposed below the plurality of pixels, the plurality of row electrodes being disposed above the plurality of pixels.
The characteristics of the present invention are that (a) three of the second sub-pixels and three of the third sub-pixels alternately enclose each of the first sub-pixels, three of the first sub-pixels and three of the third sub-pixels alternately encloses each of the second sub-pixels, and three of the first sub-pixels and three of the second sub-pixels alternately encloses each of the third sub-pixels; (b) each of the plurality of common data electrodes is zigzag or straight arranged and passes a same amount of the first sub-pixels, the second sub-pixels, and the third sub-pixels.
The present invention also provides an alternating current plasma display panel, comprising a plurality of pixels, a plurality of common data electrodes, and a plurality of row electrodes, each of the plurality of pixels including three sub-pixels such as red, green, and blue sub-pixels arranged in a delta configuration, the three sub-pixels being for emitting red, green, and blue visible lights respectively, the plurality of common electrodes being disposed below the plurality of sub-pixels, the plurality of row electrodes being disposed above the plurality of sub-pixels.
The characteristics of the present invention are that (a) the sub-pixels are arranged so that each row of the sub-pixels is for emitting a same visible light and two adjacent rows are for emitting different visible lights; (b) each of the plurality of common data electrodes is zigzag or straight arranged and passes through each row of the sub-pixels.
The present invention further provides an alternating current plasma display panel, comprising a plurality of pixels, a plurality of common data electrodes, and a plurality of row electrodes, each of the plurality of pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged in a delta configuration, the first sub-pixel, the second sub-pixel, and the third sub-pixel being for emitting red, green, and blue visible lights respectively, the plurality of common electrodes being disposed below the plurality of pixels, the plurality of row electrodes being disposed above the plurality of pixels.
The characteristics of the present invention are that (a) each row of sub-pixels is arranged with the first sub-pixels, the second sub-pixels, and the third sub-pixels in a cyclic order, only one of six sub-pixels enclosing one of the first pixels is a first pixel, only one of six sub-pixels enclosing one of the second pixels is a second pixel, and only one of six sub-pixels enclosing one of the third pixels is a third pixel; (b) each of the plurality of common data electrodes is zigzag or straight arranged and passing through a same amount of the first sub-pixels, the second sub-pixels, and the third sub-pixels.
In a preferred embodiment of the present invention, the sub-pixels are hexagonal and are honeycombed arranged; the sub-pixels also can be rectangular, polygonal, or round. Each of the plurality of row electrodes includes a bus electrode and a sustain electrode, wherein the material of the sustain electrode includes a transparent conducting material.
In brief, the present invention uses a common data electrode design to effectively reduce the amount of the data driving chips and to improve the flicker effect of the pixel areas because each common data electrode has the same capacitance.
The above is a brief description of some deficiencies in the prior art and advantages of the present invention. Other features, advantages and embodiments of the invention will be apparent to those skilled in the art from the following description, accompanying drawings and appended claims.
The discharging gas and the different phosphor layers are disposed inside the first sub-pixels 310r, the second sub-pixels 310g, and the third sub-pixels 310b. Hence, by applying a voltage to the pixel through the common data electrodes 320 and the row electrodes 330, the discharging gas will emit the ultraviolet light. Then the ultraviolet light excites the phosphor layers to make the first sub-pixel 310r to emit red visible light, the second sub-pixel 310g to emit green visible light, and the third sub-pixel 310b to emit blue visible light.
The characteristics of the alternating current plasma display panel 300 are that (a) three of the second sub-pixels 310g and three of the third sub-pixels 310b alternately enclose each first sub-pixel 310r, three of the first sub-pixels 310r and three of the third sub-pixels 310b alternately enclose each second sub-pixel 310g, and three of the first sub-pixels 310r and three of the second sub-pixels 310g alternately enclose each third sub-pixel 310b; (b) each of the plurality of common data electrodes 320 is zigzag or straight arranged and passes through the same amount of the first sub-pixels 310r, the second sub-pixels 310g, and the third sub-pixels 310b.
Further, the shapes of the first sub-pixels 310r, the second sub-pixels 310g, and the third sub-pixels 310b are determined by, for example, the barrier rib 340. The shapes can be hexagonal and the first sub-pixels 310r, the second sub-pixels 310g are honeycombed arranged. The shapes also can be rectangular, polygonal, or round. Each of the plurality of row electrodes 330 includes a bus electrode 332 and a sustain electrode 334. The row electrode 330 can be a scanning line or a common line based on the application, wherein the material of the sustain electrode 334 includes a transparent conducting material, such as, indium tin oxide (ITO).
As mentioned above, because each common data electrode 320 passes through the same amount of the first sub-pixels 310r, the second sub-pixels 310g, and the third sub-pixels 310b, the total capacitance of each common data electrode 320 is very close. Therefore, the driving characteristics of the pixel area driven by each common data electrode 320 are almost the same, which prevents the pixel area from flicker effect. Further, because the alternating current plasma display panel 300 uses common date electrodes, the number of the data electrodes and the data driving chips is reduced, thereby curtailing the costs of the alternating current plasma display panel.
It should be noted that in the above three embodiments, each common data electrode passes through the same amount of the first sub-pixels, the second sub-pixels, and the third sub-pixels. Hence, each common data electrode has almost the same capacitance. Therefore, the arrangement of the common electrodes and the sub-pixels are not limited to the above embodiments. The other arrangements also are within the scope of the invention if they are arranged so that each common data electrode passes through the same amount of the first sub-pixels, the second sub-pixels, and the third sub-pixels.
In brief, the alternating current plasma display panel in accordance with the above embodiments of the present invention can effectively reduce the amount of the data driving chips, improve the flicker effect of the pixel areas, and provide a more stable image output.
The above description provides a full and complete description of the preferred embodiments of the present invention. Various modifications, alternate construction, and equivalent may be made by those skilled in the art without changing the scope or spirit of the invention. Accordingly, the above description and illustrations should not be construed as limiting the scope of the invention which is defined by the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 92122814 A | Aug 2003 | TW | national |
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| Number | Date | Country | |
|---|---|---|---|
| 20050057172 A1 | Mar 2005 | US |
