CN100485852C - Electrode pair structure of plasma display - Google Patents

Abstract

The present invention discloses an electrode pair structure of a plasma display, the electrode pair structure comprises two electrodes, each electrode comprises a light-transmissive auxiliary electrode extending along a first direction on a surface of a front substrate and a plurality of light-transmissive sustaining electrodes, the sustaining electrodes are electrically connected to the auxiliary electrodes, and the thickness of each sustaining electrode is smaller than that of the auxiliary electrodes, wherein each auxiliary electrode comprises a first sintering material, and each sustaining electrode comprises a second sintering material.

Description

Electrode Pair Structure of Plasma Display

technical field

The invention relates to an electrode pair structure of a plasma display, in particular to a translucent electrode pair structure made of sintered materials.

Background technique

Generally speaking, display devices can be divided into two types: cathode ray tube and flat panel display, and flat panel display can be further divided into liquid crystal display, plasma display and field emission display (field emission display, FED). Among them, due to the characteristics of lightness, thinness, easy enlargement, no radiation and no viewing angle problems, etc., plasma displays have become the mainstream of large-size full-color displays in the future.

Please refer to FIG. 1 , which is a three-dimensional schematic diagram of a conventional plasma display 10 . As shown in FIG. 1 , the plasma display 10 includes a front substrate 12, a rear substrate 14 parallel to the front substrate 12, and a discharge gas (discharge gas, not shown) that is filled and sealed between the front substrate 12 and the rear substrate 14. show). The plasma display 10 also includes a plurality of electrode pairs 16 arranged in parallel on the front substrate 12, and a plurality of address electrodes (address electrodes) arranged in parallel on the surface of the rear substrate 14 in a direction perpendicular to the electrode pairs 16. 26. Each electrode pair 16 includes two electrodes 18 and 20 parallel to each other. The electrode 18 is stacked by a sustain electrode 18 a and an auxiliary electrode 18 b, and the electrode 20 includes a sustain electrode 20 a and an auxiliary electrode 20 b. Generally speaking, the sustain electrode 18a and the sustain electrode 20a are mostly transparent electrodes made of indium tin oxide (Indium Tin Oxide, ITO), while the auxiliary electrodes 18b and 20b are made of chromium/copper/chromium (Cr/Cu/Cr ) opaque electrodes made of three layers of metal materials, which are laminated on the surface of the sustain electrodes 18a, 20a, to assist the conduction of the sustain electrodes 18a, 20a.

In addition, the plasma display 10 also includes a dielectric layer 22 covering the front substrate 12; a protective layer 24 covering the dielectric layer 22; a plurality of barrier ribs (rib) 28 are arranged on the rear substrate in a parallel manner. 14, used to isolate two adjacent address electrodes 26; and a fluorescent layer 30 coated on the surface of each address electrode 26 and the sidewall surfaces of the barrier ribs 28 on both sides. Wherein, the intersection of each electrode pair 16 and two adjacent barrier walls 28 forms a discharge cell (discharge cell), and after the discharge gas in each discharge cell is excited and ionized, ultraviolet rays can be generated to irradiate the fluorescent layer 30, And respectively produce red, green or blue visible light.

It is worth noting that the existing sustain electrodes 18a, 20a are made of ITO, because ITO has high light transmittance, which can increase the screen brightness of the plasma display 10 . However, ITO has a disadvantage of high resistance, especially when the line width of the sustain electrodes 18a, 20a is smaller, the corresponding resistance is higher, which leads to increased power consumption of the plasma display 10 . The existing method for solving the foregoing shortcomings is to use an opaque metal conductive material to replace indium tin oxide to form the sustain electrodes 18a, 20a and auxiliary electrodes 18b, 20b. However, this method improves the sustain electrode 18a. , 20a and the conductivity of the auxiliary electrodes 18b, 20b, but the aperture ratio (open ratio) of the plasma display 10 is reduced, thus making the screen brightness of the plasma display 10 lower.

Contents of the invention

The technical problem to be solved by the present invention is to provide an electrode pair structure of a plasma display to overcome the above disadvantages.

According to the present invention, an electrode pair (electrode pair) structure of a plasma display (plasma display panel, PDP) is provided in a preferred implementation method of the present invention, and the electrode pair structure is arranged on a front substrate surface of the above-mentioned plasma display, the electrodes The pair structure includes two electrodes, and each electrode includes a light-transmitting auxiliary electrode extending on the surface of the front substrate along a first direction, and a plurality of light-transmitting sustain electrodes, and the sustain electrodes are electrically connected to the above-mentioned The auxiliary electrodes, and the thickness of each sustain electrode are smaller than the thickness of the auxiliary electrodes, wherein each of the above auxiliary electrodes includes a first sintered material, and each sustain electrode includes a second sintered material.

Since the present invention utilizes sintered materials to make the above-mentioned auxiliary electrodes and each sustaining electrode, each auxiliary electrode and each sustaining electrode have light transmittance and high conductivity at the same time, so the present invention can improve the screen brightness of the plasma display, and can Reduces power consumption of plasma displays.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of a conventional plasma display 10;

FIG. 2 is a three-dimensional schematic diagram of the front substrate 42 of the plasma display 40 of the present invention;

FIG. 3 is a front view of the front substrate 42 shown in FIG. 2;

FIG. 4 is a three-dimensional schematic diagram of a front substrate 42 of a plasma display 40 according to another embodiment of the present invention;

5 to 9 are schematic diagrams of the manufacturing method of the front substrate 42 of the plasma display 40 of the present invention.

Explanation of reference numbers

10 Plasma Display 12 Front Substrate

14 rear substrate 16 electrode pair

18 Electrode 18a Sustaining electrode

18b auxiliary electrode 20 electrode

20a Sustaining electrode 20b Auxiliary electrode

22 Dielectric layer 24 Protective layer

26 Addressing Electrode 28 Barrier Wall

30 fluorescent layers

40 Plasma Display 42 Front Substrate

43 Photosensitive sintered material 43a Patterned photosensitive sintered material

44 Electrode pair 45 Photosensitive sintered material

45a Patterned photosensitive sintered material 46 Electrode

46a Auxiliary electrode 46b Sustaining electrode

47a Conductive layer 47b Conductive layer

48 Electrode 48a Auxiliary electrode

48b Sustaining electrode 49a Conductive layer

49b Conductive layer

Detailed ways

Please refer to FIG. 2 to FIG. 4 , FIG. 2 is a schematic perspective view of the front substrate 42 of the plasma display 40 of the present invention, and FIG. 3 is a front view of the front substrate 42 shown in FIG. 2 , and FIG. 4 is another embodiment of the present invention. A three-dimensional schematic diagram of the front substrate 42 of the plasma display 40. As shown in FIG. 2 , the plasma display 40 includes a front substrate 42 and a plurality of electrode pairs 44 disposed in parallel on the surface of the front substrate 42 . In addition, the plasma display 40 also includes a rear substrate (not shown) parallel to and opposite to the front substrate 42, and a plurality of barrier walls (not shown) arranged in parallel between the rear substrate and the front substrate 42, and each The barrier ribs are substantially perpendicular to each electrode pair 44 , and the intersection of any two adjacent barrier ribs and each electrode pair 44 forms a discharge cell.

As shown in FIGS. 2 and 3 , an electrode pair 44 includes two electrodes 46 and 48 parallel to each other. Wherein, the electrode 46 includes a light-transmissible auxiliary electrode 46a extending on the surface of the front substrate 42, and a plurality of light-transmissible sustain electrodes 46b, each sustain electrode 46b is electrically connected to the auxiliary electrode 46a, and the auxiliary electrode 46a is formed by stacking a conductive layer 47b and a conductive layer 47a up and down, and the thickness of each sustain electrode 46b is smaller than the thickness of each auxiliary electrode 46a. In addition, the electrode 48 includes a light-transmittable auxiliary electrode 48a parallel to the auxiliary electrode 46a, and a plurality of light-transmissible sustain electrodes 48b opposite to each sustain electrode 46b, and each sustain electrode 48b is electrically connected to the auxiliary electrode 48a, and The auxiliary electrodes 48a are formed by stacking a conductive layer 49b and a conductive layer 49a one above the other, and the thickness of each sustain electrode 48b is smaller than that of each auxiliary electrode 48a. In addition, as shown in FIG. 2, the two opposite sustain electrodes 46b and 48b are located in the same discharge cell for discharging to ignite the plasma in each discharge cell, and each auxiliary electrode 46a, 48a is used to assist the sustain electrode 46b , 48b is conductive. It should be noted that each sustain electrode 46b, 48b is made of black sintered silver, the conductive layers 47a, 49a of each auxiliary electrode 46a, 48a are made of black sintered silver, and the conductive layer 47b of each auxiliary electrode 46a, 48a is made of black sintered silver. , 49b are all made of a white sintered silver.

It must be noted that since the white sintered silver and the black sintered silver are both a sintering material, both the white sintered silver and the black sintered silver have pores to allow light to pass through, so the auxiliary electrodes 46a, 48a and the sustain electrodes Both 46b and 48b are transparent. Furthermore, by controlling parameters such as the porosity and thickness of the white sintered silver and the black sintered silver, the light transmittance of each auxiliary electrode 46a, 48a and each sustain electrode 46b, 48b can be adjusted, while the white sintered silver and the black sintered silver The porosity can be controlled by adjusting parameters such as sintering temperature, sintering time and materials. Moreover, since the resistance value of black sintered silver and white sintered silver is only about 10mΩ/□, which is far lower than the resistance value of indium tin oxide (15-30Ω/□), black sintered silver and white sintered silver have light-transmitting properties at the same time. The advantages of sex and low resistance value. In addition, since the resistance value of white sintered silver is slightly lower than that of black sintered silver, the conductivity of each auxiliary electrode 46a, 48a is relatively high, and can effectively assist the sustain electrodes 46b, 48b to conduct electricity. On the other hand, since each sustain electrode 46b, 48b includes a darker black sintered silver, it can absorb light entering the plasma display 40 from the external environment, thereby increasing the contrast effect of the plasma display 40 .

In addition, in other embodiments of the present invention, each sustain electrode 46b, 48b can also be made of white sintered silver, and the conductive layer 47a, 49a of each auxiliary electrode 46a, 48a is made of white sintered silver, and each auxiliary electrode 46a, 48a is made of white sintered silver. The conductive layers 47b, 49b of the electrodes 46a, 48a consist of a black sintered silver.

On the other hand, each sustain electrode 46b, 48b shown in FIG. 2 is not the only structure of the present invention. In fact, the shape of each sustain electrode 46b, 48b can be designed according to the requirements of the manufacturing process, discharge efficiency or customer demand, for example, The T-shaped sustain electrodes 46b and 48b shown in FIG. 4 are another embodiment of the present invention. Moreover, since the resistance values of black sintered silver and white sintered silver are quite low, as shown in FIG. conductivity.

Please refer to FIG. 5 to FIG. 9 . FIG. 5 to FIG. 9 are schematic views of the manufacturing method of the front substrate 42 of the plasma display 40 of the present invention. As shown in FIG. 5 , firstly, a photosensitive sintering material 43 is uniformly formed on the surface of a glass substrate 42 by coating or screen printing. Then, as shown in FIG. 6, a first exposure and development step is carried out to form a plurality of patterned photosensitive sintered materials 43a in the photosensitive sintered material 43, and each patterned photosensitive sintered material 43a defines each sustain electrode 46b respectively. and 48b, and the positions of the conductive layers 47a and 49a of the respective auxiliary electrodes 46a and 48a. In a preferred embodiment of the present invention, the photosensitive sintering material 43 includes a black silver paste (blackAg paste), and the black silver paste is composed of silver powder, oxide and a photosensitive material.

Subsequently, as shown in FIG. 7 , a photosensitive sintering material 45 is evenly formed on the surface of the glass substrate 42 and each patterned photosensitive sintering material 43 a by coating or screen printing. Then, as shown in FIG. 8, a second exposure and development step is carried out to form a plurality of patterned photosensitive sintered materials 45a in the photosensitive sintered material 45, and each patterned photosensitive sintered material 45a defines each auxiliary electrode 46a respectively. The positions of the conductive layers 47b and 49b of 48a. At this time, the width of each patterned photosensitive sintered material 43a is respectively W ₁ , and the width of each patterned photosensitive sintered material 45a is respectively W ₂ . In a preferred embodiment of the present invention, the photosensitive sintering material 45 includes a white silver paste (white Ag paste), and the white silver paste is composed of silver powder and a photosensitive material.

Finally, as shown in FIG. 9, a sintering step is carried out to simultaneously sinter each patterned photosensitive sintering material 43a and each patterned photosensitive sintering material 45a to form each sustaining electrode 46b, 48b and each auxiliary electrode 46a, 48a, The temperature in the sintering step is between 500°C and 600°C. On the other hand, since the above-mentioned sintering step will shrink each sintered material, the width of each patterned photosensitive sintered material 43a will be reduced from W ₁ to W ₃ , and the width of each patterned photosensitive sintered material 45a will be reduced by W ₂ is reduced to W ₄ . That is to say, in each exposure and development step, the present invention forms patterned photosensitive sintered materials 43a, 45a with larger line widths, and then reduces the patterned photosensitive sintered materials through a sintering step. 43a, 45a to form the sustain electrodes 46b, 48b and the auxiliary electrodes 46a, 48a. It can be seen that the width of each electrode in the present invention can be smaller than the resolution of the general yellow light process. In addition, in other embodiments of the present invention, after the above-mentioned first exposure and development step is performed, a sintering step may be performed first to sinter each patterned photosensitive sintering material 43a into each sustain electrode 46b, 48b. In addition, in other embodiments of the present invention, each patterned photosensitive sintering material 45a can also be formed on the glass substrate 42 first, and then a plurality of patterned photosensitive sintering materials 43a are formed on each patterned photosensitive sintering material 45a. On the photosensitive sintering material 45a, a sintering step is used to sinter the patterned photosensitive sintering materials 43a, 45a at last, and in this embodiment, the photosensitive sintering material 43 is a white silver paste, and the photosensitive sintering material 45 is It is a black silver paste.

Compared with the prior art, the present invention uses white sintered silver and black sintered silver to make auxiliary electrodes 46a, 48a and sustain electrodes 46b, 48b respectively, so the electrical conductivity of auxiliary electrodes 46a, 48a and sustain electrodes 46b, 48b of the present invention High, thereby reducing the power consumption of the plasma display 40. In addition, since the white sintered silver and the black sintered silver are sintered materials, which have pores to allow light to pass through, the auxiliary electrodes 46a, 48a and the sustain electrodes 46b, 48b of the present invention all have light transmittance, thereby improving the efficiency of the plasma. The screen brightness of the display 40 . Also, since each of the sustain electrodes 46b, 48b can be made of black sintered silver, the contrast effect of the plasma display 40 can be increased.

The above descriptions are only preferred embodiments of the present invention, and all equivalent transformations and modifications made according to the concept of the present invention shall fall within the scope of protection claimed by the present invention.

Claims (20)

1. An electrode pair structure of a plasma display, the electrode pair structure is arranged on a front substrate surface of the above-mentioned plasma display, and the electrode pair structure comprises: Two electrodes, each comprising: a light-transmissive auxiliary electrode extending along a first direction on the surface of the front substrate; and A plurality of light-transmittable sustain electrodes, the sustain electrodes are electrically connected to the auxiliary electrodes, and the thickness of each sustain electrode is smaller than the thickness of the auxiliary electrodes; The light-transmitting auxiliary electrodes include a first sintered material, and each sustain electrode includes a second sintered material. 2. The electrode pair structure as claimed in claim 1, wherein the first sintered material comprises a white sintered silver and a black sintered silver. 3. The electrode pair structure as claimed in claim 2, wherein said second sintered material comprises a white sintered silver. 4. The electrode pair structure as claimed in claim 2, wherein the second sintered material comprises a black sintered silver for increasing the contrast effect of the plasma display. 5. A plasma display comprising: a first substrate having a first surface; A second substrate parallel to the first substrate, a plurality of barrier ribs disposed between the second substrate and the first substrate; and A plurality of electrode pairs are arranged on the above-mentioned first substrate, and each electrode pair includes: Two auxiliary electrodes, both of which extend on the first surface along a first direction, and the intersections of the auxiliary electrodes and any two adjacent barrier walls form a discharge cell; and A plurality of sustain electrode groups are respectively arranged on the first surface in each of the above-mentioned discharge cells, and each sustain electrode group includes two opposite sustain electrodes, which are respectively electrically connected to each auxiliary electrode; Wherein the thicknesses of the sustaining electrodes mentioned above are all smaller than the thicknesses of the auxiliary electrodes, each auxiliary electrode includes a first sintered material, each sustaining electrode includes a second sintering material, and each auxiliary electrode and each sustaining electrode have light-transmitting sex. 6. The plasma display as claimed in claim 5, wherein each of the barrier ribs comprises a strip structure or a closed structure. 7. The plasma display as claimed in claim 6, wherein the barrier ribs of the closed structure are arranged in a triangular shape. 8. The plasma display as claimed in claim 5, wherein the first sintered material comprises a white sintered silver and a black sintered silver. 9. The plasma display as claimed in claim 8, wherein said second sintered material comprises a white sintered silver. 10. The plasma display as claimed in claim 8, wherein the second sintered material comprises a black sintered silver for increasing the contrast effect of the plasma display. 11. A method for manufacturing an electrode of a plasma display, the electrode is arranged on a front substrate of the above-mentioned plasma display, the electrode includes an auxiliary electrode and a plurality of sustain electrodes electrically connected to the above-mentioned auxiliary electrode, the method comprising: forming a first photosensitive sintering material on the front substrate; performing a first exposure and development step, so as to define the patterns of the above-mentioned sustain electrodes and auxiliary electrodes in the above-mentioned first photosensitive sintering material; forming a second photosensitive sintering material on the front substrate; performing a second exposure and development step to define the pattern of the auxiliary electrode in the second photo-sintering material; and A sintering step is performed to simultaneously sinter the first and second photosensitive sintering materials to form the sustain electrodes and the auxiliary electrodes, and both the sustain electrodes and the auxiliary electrodes have light transmittance. 12. The method of claim 11, wherein the first photo-sintering material comprises a black silver paste. 13. The method as claimed in claim 12, wherein the black silver paste comprises silver powder, oxide and a photosensitive material. 14. The method of claim 12, wherein the second photo-sintering material comprises a white silver paste. 15. The method of claim 14, wherein the white silver paste comprises silver powder and a photosensitive material. 16. The method of claim 15, wherein the second photo-sintering material is formed on the first photo-sintering material. 17. The method of claim 11, wherein the first photo-sintering material comprises a white silver paste. 18. The method of claim 17, wherein the second photo-sintering material comprises a black silver paste. 19. The method of claim 18, wherein the first photo-sintering material is formed on the second photo-sintering material. 20. The method of claim 11, wherein the temperature of the sintering step is between 500°C and 600°C.

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