TW578186B - Plasma display panel and method of forming the same - Google Patents

Abstract

A plasma display panel comprises a front substrate having a plurality of parallel electrode pairs arranged thereon, and a back substrate positioned under the front substrate. A plurality of waffle-structured ribs is in parallel arranged on the back substrate, and each of the waffle-structured ribs is positioned under the corresponding electrode pair. Furthermore, a plurality of light-shielding layers is formed on the back substrate and each of the light-shielding layers is located between two adjacent waffle-structured ribs.

Description

578186

Year A Case No. 91135341 V. Description of the invention (ί) The technical field to which the invention belongs The present invention relates to a plasma display, and in particular to a display panel with high contrast (c ο n t r a s t r a t i 〇) effect. The prior art electro-polymer display (p 1 asma di sp 1 ay Pane 1, PDP) is a flat display that generates light by gas discharge. It is composed of a plurality of discharge cells (discharge cel 1) filled with an inert gas. After the inert gas in each discharge cell is excited by the electric field, it can generate ultraviolet light to illuminate the phosphor on the surface of each discharge cell, and then the red, green and blue reflected by different phosphors The visible light is combined with the design of the driving circuit and the image signal processing to mix the three primary colors of visible light to form a colorful picture. Plasma displays are large and thin, and have the advantages of low radiation and wide viewing angles, so they are the mainstream of future large-size displays. (discharge gas, between plates 1 to 4. Among them, the electrode pairs 16 in the row, each 18 and the electrode 20, please refer to the figure: Figure 1 is a schematic cross-sectional view of a conventional plasma display. Figure 1 As shown, the plasma display 10 includes a front substrate 12, two rear substrates parallel to the front substrate 12, and a discharge gas.

578186

The stack of electrodes 20 was made up of white men and women for 20 hours. In general, Vita Leto f holds the electrode 203 and the auxiliary electrode T d ° τ to seize electricity. The pole I83 and the sustain electrode 20a are mostly composed of oxygen case number 91135341 V. Description of the invention (2) = (- -Tin auxiliary electrodes 18b and 20b are opaque electrodes made of chrome / copper / chromium materials. Although their light transmittance is poor, they have excellent conductivity, so they are designed to be stacked on the surface of the sustaining electrode 203. As an auxiliary sustaining electrode 183, 2 the surface of the front substrate 12 is further provided with a dielectric layer 24 covering the front substrate 12 and a protective layer 26 covering the dielectric layer 22. Generally, The dielectric layers 24 and 26 are made of a light-transmissive material. On the other hand, the surface of the rear substrate 14 is provided with a plurality of address electrodes 28 and a plurality of barrier ribs. (Rib) 30, wherein the address electrodes 28 are arranged parallel to the surface of the rear substrate 14 in a direction perpendicular to the electrode pair 16, and the barrier ribs 30 are arranged on the rear substrate 14 in a parallel manner. To isolate two adjacent address electrodes 26. In addition, a fluorescent light is provided on the surface of the rear substrate 14. The layer 32 'is coated on the surface of each fixed electrode 28 and the sidewall surface of the barrier ribs 30 on both sides. It is worth noting that each electrode pair 16 meets two adjacent barrier ribs 30. (Intersection) is to form a discharge cell (discharge ce 1 1) 3 4, and the discharge gas in each discharge cell 3 4 can generate ultraviolet rays to irradiate the fluorescent layer 3 2 after being excited and ionized, and respectively produce red, green or Blue visible light.

Page 8 578186 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — Contrast effect: a light-shielding layer (j] ghh shielding layer, or black matrix layer) is also provided between the electrode pairs 16 of phase ΓΓ, and light leakage occurs between the electrode pairs 16 (Ugthis, (cross- talk), and the light-shielding layer 22 also has an anti-reflection function. However, if the material of the light-shielding layer 22 is in direct contact with the sustain electrodes 18a, 20a or the auxiliary electrodes 18b, 20b, reduction and application will occur. The color of the light-shielding layer 22 is faded, for example, from black to brown. Therefore, in order to avoid the above situation, in the conventional TV display 丨 0, a certain distance must be maintained between the light-shielding layer 22 and the sustain electrodes 18a and 20a Distance (such as dl) to avoid the light shielding layer 22 from contacting the sustaining electrodes 18 a, 20 a or the auxiliary electrodes 18 b, 2 0 b. However, the light shielding layer 2 2 and the sustaining electrodes 18 a, 2 0 a The gap between them often leads to light leakage, which reduces the brightness of the daytime display of the plasma display. This further affects the display quality of the plasma display 10. The object of the present invention is to provide a plasma display panel with a high contrast effect to solve the aforementioned problems. According to the purpose of the present invention, preferred embodiments of the present invention A plasma display is provided. The plasma display includes a front substrate and a rear substrate. The front substrate is provided with a plurality of parallel electrode pairs (e 1ectr ode P air). Below the front substrate, and the rear substrate contains a plurality of grid-like barriers. The next wall (waf f 1 e- 578186 case number 91135341 _-year, month and day correction '·. ~~: 1: ~; ： —-—. _____ V. Description of the invention (4) ~~ Structured ribs are arranged in parallel on the surface of the rear substrate and a plurality of light-shielding layers, and each of the grid-shaped barrier ribs is disposed above the corresponding one. Under each of the electrode pairs, and each of the light-shielding layers is disposed between any two adjacent sides. Each of the grid-shaped barrier ribs. Since the light layer of the present invention does not react with the front base, the light-shielding can be avoided. Layer 54 (Light area) coverage ratio, and then increase (contrast ratio J > rf · This also increases the ad line due to comparable products, the production area C is up or up, and the dark and dark image board is missing in the display base. After the layer is displayed, the color on the 17t side of the mutual light is hidden in the daytime. This layer is designed to display the high-level electrical system. This layer is used to display the light and light. The concealment and concealment 丨 the electric effect is due to the effect of the surface of the board. The embodiment is shown in Figures 2 to 3. Figure 2 is a schematic cross-sectional view of the plasma display 40 of the present invention. Schematic diagram of section 3—3. As shown in FIG. 2, the plasma display panel 40 includes a front substrate 42 ′, a rear substrate 44 parallel to the front substrate 42, and a discharge gas (not shown) to fill and seal the front substrate 42 and the rear substrate. Between 44. The 'rigid substrate 4 2' is provided with a plurality of electrode pairs 46 arranged in parallel on the surface of the substrate 4 and each electricity; the pair 46 includes two electrodes 4 8 and 50 which are parallel to each other. The electrode 4 8 is a sustaining electrode. The 4 8 a and the auxiliary electrode 4 8 b are stacked, and the electrode 50 includes a sustain electrode 5 0a and an auxiliary electrode 5 0b. In a preferred embodiment of the present invention, each of the sustain electrodes 48a and 50a is a transparent conductive layer.

Page 10 578186 Fun Factory II Invention Description C5) Electrical Materials ’Example

48b and 5Ob are resistive conductive materials, indium tin oxide or indium zinc oxide (IZ〇), and each auxiliary electrode is a metal material such as chromium-copper-chromium or silver or other low-electricity n 2 囷, 囷 = and Figure 2 As shown by the householder, a plurality of waffle-structured ribs ^^ are formed on the surface of the rear substrate 44. The light-layer barriers 52 are arranged on the surface of the rear soil plate 4 in parallel and equidistantly. 4f surface, and each grid-shaped barrier wall M and its corresponding electricity, pair 46 series are opposed to each other in parallel, and each light-shielding layer 5 is provided between two adjacent grid-shaped barrier walls 5.2 to avoid Light leakage or light interference of the 2 shape. In addition, each of the mule-shaped barrier ribs 52 includes a plurality of barrier rib units (ribce 1 1) 5 2 a, 5 2 b, and 5 2 c, and each of the barrier rib units Ma, 52b, and 52c is provided with a red fluorescent lamp. The phosphor layer 58a, the green phosphor layer 5 8 b, and the blue phosphor layer 5 8 c. In addition, each barrier wall unit 5 2 a, 5 2 b, 5 2 c and each electrode pair 4 6 constitute a plurality of discharge cells (not shown). When the discharge gas in each discharge cell is excited and ionized, it can be generated. Ultraviolet light irradiates each of the phosphor layers 58a, 58b, and 58c, and generates visible light of red, green, or blue, respectively. Knife

In a preferred embodiment of the present invention, the grid-like barrier wall 52 is a black-type rib, and its composition includes a low melting point & glass or metal oxide, and the light-shielding layer 5 4 system Consisting of black dyes (1313 (^ 1) 411 ^ 111:) _ such as oxidized town, copper oxide, ferric iron, or black resin ("3 丨 11). In addition, in other embodiments of the present invention, the grid-shaped barrier ribs 5 2 series are white-type ribs, or use white

Page 11 578186 _____ Case No. 91135341 Revised Month-Date _ V. Description of the Invention (6) Color barriers and black barriers are stacked on top of each other to form grid-like barriers 5 2 'wherein the components of the white barrier 白色 include Low-dazzle glass or metal oxide. On the other hand, the light-shielding layer 54 may be made of a light-sensitive material.

It is worth noting that the light-shielding layer 54 of the present invention is disposed between the grid-like barrier walls 52 on the rear substrate 44. Therefore, in the present invention, the light-shielding layer 54 may be connected to the grid-like barrier wall 52 or the front substrate 46. The protective layer (not shown) is in contact with each other, but the light-shielding layer 5 4 does not contact the electrode pair 46 to cause a reduction reaction, so that the lack of discoloration of the light-shielding layer 5 4 can be avoided. Furthermore, the material of the light-shielding layer 54 is similar to that of the grid-like barrier ribs 52, so it can coexist stably, and experiments have proved that the light-shielding layer 54 and the protective layer can also be stably combined. On the other hand, since the light-shielding layer 54 is provided on the rear substrate 46 according to the present invention, the light-shielding area of the light-shielding layer 54 can be effectively increased to completely shield the gap 56 between the adjacent electrode pairs 46, which can be greatly avoided. The situation of light leakage or light interference further improves the contrast effect of the screen display of the electric display 40. Please refer to FIG. 4 (A) to FIG. 4 (D). FIG. 4 (A) to FIG. 4 (D) are schematic diagrams of a manufacturing method of a plasma display 40 according to a preferred embodiment of the present invention. 2 As shown in FIG. 4 (A), a plurality of electrodes (not shown) and a white reflective dielectric layer (not shown) are sequentially formed on a glass substrate 44 to cover the address electrodes. Next, a whole surface printing process is performed to form a rib material layer 51 on the white reflective dielectric layer, and the barrier material layer 51 may be a white paste layer or black

Page 12 578186 --------- Case No. "_ One Month—Day__j 务 正 _ V. Description of the Invention (7) The slurry layer contains low melting point glass, metal oxide, Solvent or adhesive. Subsequently, a patterned dry film photoresist layer 5 3 'is pasted on the barrier wall material layer 51 to define a pattern of a grid-shaped barrier wall to be formed later. In addition, in other embodiments of the present invention, the barrier wall material layer 5r may include both a white slurry layer and a black crowd layer, that is, the barrier wall material layer 51 is stacked on top of each other by a white polymer layer and a black paddle layer. Made. As shown in Figure (B), a sandblasting or a dry etching process is then performed to remove the barrier material layer 5 which is not covered by the dry film photoresist layer 53, and then a sintering process is performed to make the remaining The barrier wall material layer 5 is sintered into a plurality of grid-shaped barrier walls 52, and finally a wet etching process is performed to remove the dry film photoresist layer 53 to complete the production of the grid-shaped barrier walls 52, and each of the grid-shaped barrier walls 5 2 each has a plurality of barrier wall units 5 2 a, 5 2 b, and 5 2 c 〇 As shown in FIG. 4 (C), a first screen printing process is performed to form between each f-shaped barrier wall 52 A light-shielding layer 54 is then subjected to a drying process and a first sintering process, so that the solvent in the light-shielding layer 54 is completely volatilized and solidified, and the production of the light-shielding layer 54 is completed. Generally, the material of the light-shielding layer 54 may be a photosensitive material, magnesium oxide, copper oxide, iron oxide, black resin, or the like. Then, as shown in FIG. 4 (D), a second screen printing process is performed, and the red phosphor layer 58a, the green phosphor layer 58b, and the blue phosphor layer 5 8c are sequentially formed on each barrier wall unit 5 2 a, 5 2 b, and 5 2 c. Later

Page 13 578186 __ ~~ ^ _ year, month, and day. Amendment V. Invention Description (8) ~ — A second sintering process is performed to make the red phosphor layer 58a, the green phosphor layer 58b, and the blue phosphor layer 58c. The solvent in the solvent completely volatilizes and solidifies, and the production of the substrate 44 is completed. It is worth noting that the above steps of manufacturing the light-shielding layer 5 4 and the phosphor layers 5 8 a, 5 8 b, and 5 8 c can be mutually adjusted. That is, the phosphor layers 58a, 58b, and 58c can be formed first, and then the light-shielding layer 54r, the light-shielding layer 54, and the glare-body layers 5 8a, 5 8b, and 5 8c must be sintered, so the light-shielding layer 54 and fluorescent The body layers 58a, 58b, and 58c can also be sintered at the same time to simplify the process steps and thereby reduce the process cost. In addition, the manufacturing method of the 'front substrate 42' of the plasma display panel 40 and the front substrate 42 of the present invention The assembly method with the rear substrate 44 is the same as the conventional technology, so it will not be described in detail. Compared to the conventional technology, the light-shielding layer 54 of the present invention is disposed between the grid-like barrier walls 52 on the rear substrate 44. And parallel to the electrode pairs 46 on the surface of the front substrate 4 2 Therefore, in the present invention, the light-shielding layer 5 4 does not come into contact with the electrode pair 46 to cause a reduction reaction, so it can effectively avoid the lack of discoloration of the light-shielding layer 54. Furthermore, since the light-shielding layer is used in the present invention, 5 4 is provided on the rear substrate 46, so not only can the light shielding area of the light shielding layer 54 be greatly increased to increase the coverage ratio of the light shielding layer 54 in the dark area, but also it can effectively avoid light leakage or light interference. Therefore, the contrast effect of the screen display of the plasma display 40 is improved. Moreover, the light-shielding layer 54 can also be sintered with the phosphor layers 58a, 58b, and 58c at the same time, thereby simplifying the process steps and reducing the process cost, thereby improving

Page 14 578186 Case No. 91135341 Date of Amendment V. Description of Invention (9) Improve product competitiveness. The above are only the preferred embodiments of the present invention. Any equal changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Page 15 578186 Case No. 9Π35341 —— Year Month Day Amendment ____ Brief description of the diagram Brief description of the diagram: Figure 1 is a schematic sectional view of the conventional electric paddle display 10. FIG. 2 is a schematic cross-sectional view of a plasma display 40 of the present invention. Figure 3 is a schematic cross-sectional view taken along line 3-3 of Figure 2. FIGS. 4 (A) to 4 (D) are schematic diagrams of a manufacturing method of a preferred embodiment of the plasma display 40 of the present invention. Explanation of symbols: 10, 40 plasma display 12, 42 front substrate 14 v 44 rear substrate 16, 46 electrode pairs 18, 2 (l ·, 48 ~ 50 electrodes 22 light-shielding layers 18a, 20a, 48a, 5 0a sustain electrodes 18b , 20b, 48b, 50b Auxiliary electrode 24 Dielectric layer 26 Protective layer 28 Addressing electrode 30 Barrier wall 32 Phosphor layer 3 4 Discharge unit 52 Lattice barrier wall 52a, 52b, 52c Barrier wall unit 51 Barrier wall material layer 5 3 Dry Film Photoresist 54 Masking Layer 56 Gap

Page 16

578186 Case No. 91135341 Month-Day Amendment Simple illustration 5 8a Red phosphor layer 58b Green phosphor layer 58c Blue phosphor layer mn page 17

Claims (1)

▼ SM η —— ——Year Month Day Correction Stomach Profit Range- ~ ———-; ———— 1 · A plasma display includes: a substrate 'on which are arranged a plurality of parallel electrode pairs Ulectrode pair); and a * Γ rear substrate, which are arranged in parallel and oppositely under the front substrate, and the rear substrate includes: 4 mountains ▲ a plurality of lattice-shaped barrier ribs (waffle-structured ribs) parallel material 5 5 于 Ϊ On the surface of the rear substrate, and each of the grid-shaped barrier ribs should be disposed under each of the electrode pairs above; and, a ight-shielding layer is disposed on any two phases, respectively Between each of the grid-like barrier walls. 2. An electrical display as described in the first item of the patent application scope, wherein each of the rafters and barrier walls includes a plurality of rib cells, and each of the rib cells The barrier wall sheet 70 is surrounded by a discharge cell (di scharge ce 1 1). 3. / If the plasma display is applied for the scope of item 2, each of the light shielding layers is used to avoid the discharge cells. Light interference (cr〇ss_ talk) 〇 4 'as applied The plasma display of item 2 of the patent, wherein the light-shielding layers are disposed on the rear substrate and are not in contact with each of the electrode pairs, so as to prevent the material in each of the light-shielding layers from diffusing into each of the electrode pairs, and further Discoloration of each of the light shielding layers is prevented. 578186 Case No. 91135341 Amendment on the month of June 6. Application for patent scope 5. For the plasma display of patent application No. 2 item, each of the barrier wall units is provided with a phosphor layer (phosphor layer), and each of the fluorescent lamps The bulk layers all include a red phosphor layer, a blue phosphor layer, or a green phosphor layer. 6. For example, the electro-polymer display panel of the scope of patent application, wherein each of the electrode pairs includes two electrodes, and each of the electrodes includes: a sustain electrode provided on the front substrate surface; and an auxiliary electrode device On the surface of the sustain electrode. 7. For the electric display panel of item 6 of the patent application, wherein each of the sustain electrodes includes indium tin oxide (Indium Tin Oxide, I TO) or indium oxide (IZ 0), And each auxiliary electrode contains chromium-copper-chromium (Cr / Cu / Cr) or silver. 8. For the electric display of item 1 of the patent application scope, each of the light-shielding layers comprises a photosensitive material (1 i g h t-s en n s i t i v e material), or a black dye (blackpigment). 9. The plasma display of item 8 of the patent application, wherein the black dye contains magnesium oxide, copper oxide, iron oxide, or black resin (resin) ° Page 19 578186 ^ Month said Amendment No. 91135341 VI. Scope of patent application ^ ^ ^ ^ ^ ^ ^ 1 ~ ————- 10 · If the electro-polymer display of item 1 of the patent scope is applied, each of the grids does not block. The walls all include white-type black barriers (white_type black-type ribs). 11 · The plasma display of the patent application No. 10 shows that the sub-shaped barriers contain low melting glass or metal oxides. 1 2 -A method for manufacturing a substrate for an electro-polymer display, the manufacturing method includes the following steps: providing a first substrate; forming a plurality of parallel-arranged grid-shaped ridges and partition walls on the first substrate, and each of the grid-shaped barriers Each wall includes a plurality of barrier wall units; a phosphor layer is formed in each of the barrier wall units; and a light-shielding layer is formed on the first substrate between any two adjacent ones of the grid-shaped barrier walls. 1 3 · The method according to item 12 of the scope of patent application, wherein the method of forming each of the light-shielding layer and each of the phosphor layers includes the following steps: A first screen printing (scr eenpr ″ nting) process μ / a light-shielding material layer on a substrate between any two adjacent grid-shaped barrier ribs; and a second screen printing process to form a fluorescent film in each barrier rib unit Light body material layer. Included on page 20, followed by another legal formula. This brush layer is printed on its body, and its plate is lighted. The method of light emission is one by one, and the item is not included in the chemical. The line is solid, and the layer is surrounded. If the material is light, please burn it. The second should be the first. • The first 5 will be amended by 578186 case number 91135341 __year, month and day. _16. The scope of patent application 1 4. The method of item 13 of the scope of patent application, where the method further includes A first firing process is performed after the first screen printing process to sinter the light-shielding material layers into the light-shielding layers. 16. The method according to item 13 of the scope of patent application, wherein the method further comprises: performing a third firing process to simultaneously burn each of the light-shielding material layer and each of the glaze body material layer separately. Each of the light shielding layers and each of the phosphor layers are formed. 1 7. The method according to item 13 of the scope of patent application, wherein each of the light-shielding layers contains a photosensitive material or a black dye. 18. The method according to item 17 of the scope of patent application, wherein the black dye system comprises magnesium oxide, copper oxide, iron oxide, or a black resin. 19. The method according to item 13 of the scope of application for a patent, wherein each of the phosphor layers includes a red phosphor layer, a blue phosphor layer, or a green phosphor layer. Page 21 578186 Case No. 91135341 Amendment VI. Patent application scope 20. For the method of patent application scope item 12, the method further includes providing a second substrate in parallel with the first substrate. A substrate; and a plurality of electrode pairs arranged in parallel on the surface of the second substrate, and each of the electrode pairs is located above the grid-shaped barrier walls corresponding to the electrode pairs, wherein each of the electrode pairs includes a A sustain electrode is disposed on the surface of the second substrate, and an auxiliary electrode is disposed on the surface of the sustain electrode. 〇 2 1. The method according to item 12 of the scope of patent application, wherein each of the lattice-shaped barrier ribs comprises a white barrier rib or a black barrier rib. 22. The method according to item 21 of the scope of patent application, wherein each of the lattice-shaped barrier ribs comprises a low-melting glass or a metal oxide. 2 3. The method according to item 20 of the scope of patent application, wherein each of the sustaining electrodes includes indium tin oxide or indium zinc oxide, and each of the auxiliary electrodes includes complex copper-copper complex or silver. 〇