TW200823950A - Back panel structure of plasma display panel - Google Patents

Abstract

A structure of the back panel for the plasma display panel (PDP) is provided. The lateral barrier ribs and the vertical barrier ribs are crossed over to form the lattice-like discharge cells. The lateral barrier ribs or the vertical barrier ribs have the protruded-portions towards the discharge cells, which can make the air expel from the sides of the protruded-portions during the filling-process of the phosphor paste. The nonuniform-thickness phenomenon caused by the air-bubble for the phosphor material coated on the bottom-surface of the discharge cell is improved, and so the panel flicker-point is eliminated. Furthermore, the discharge space is increased owing to the increased stacking-density of the phosphor material. Therefore, the illumination efficiency of the PDP is promoted. Besides, the lateral barrier ribs and the vertical barrier ribs may also be designed to have height difference to improve the air-extracting efficiency for the filling-process of the phosphor paste.

Description

200823950 IX. Description of the Invention: [Technical Field] The present invention relates to a barrier wall structure for a rear panel of a plasma display, and more particularly to a barrier wall structure having a projection. [Prior Art] In recent years, various types of flat display technologies have flourished, such as liquid crystal displays (LCDs), field emission displays (FEDs), and plasma display panels (PDPs). Wait. In the flat panel display (卩1 station Panel Display, FPD), the PDP has the advantages of simple structure, easy to make large-size screen, long life, super wide viewing angle of more than 160°, and overall thinness and space. It is applied to various large-sized display devices such as large-sized FPD TVs. The basic principle of PDP is to apply an electric field to an inert gas such as helium (He) or xenon (Xe) to cause a discharge phenomenon and emit ultraviolet light. The color fluorescent substance (ph〇sph〇r material) is exposed to ultraviolet light. The light is excited and then emits visible light. The display area of the PDP is composed of a plurality of pixels (4) 峨ceii). The new generation of pDp. is usually formed by a lateral barrier wall and a longitudinal barrier wall interlaced to form a lattice-like discharge cell (discharge). Cell), please refer to the prior art ία to 1C, FIG. 1A is a top view of a partial discharge cell, FIG. 1B is a top view of a single discharge cell, and FIG. 1C is a single discharge crystal A schematic view of the cells, each of the discharge cells 12 is a space surrounded by two adjacent longitudinal barrier walls 14 and two adjacent lateral barrier walls 16. Generally, a fluorescent substance is coated on the bottom surface of the discharge cell and on the side of each of the discharge cells 12 to block the coating area, thereby increasing the luminous efficiency of pDp; The corresponding screen of the discharge cell is printed in the opposite direction. The figure is a schematic diagram of the technique of filling the phosphor ink (10) 〇sph〇r into the discharge cell, the complex electricity 5 200823950 • the pole 20 is arranged in parallel on the glass On the substrate 18, a dielectric layer 22 is disposed on the glass substrate 18 and covers the electrode 20. The plurality of lateral barrier walls 16 are disposed on the dielectric layer 22 between the two adjacent lateral barrier walls 16. The space is the discharge cell 12, and a doctor blade 28 fills the phosphor paste 26 through the cell of the die-shaped mesh plate 24 into the discharge cell 12' but prints the phosphor paste 26 here. In the process, the bubbles 32 are easily enclosed. Therefore, after the solvent of the camping ink slurry 26 is volatilized by heat, the phosphor material may have uneven film thickness. As shown in FIG. 1E, the fluorescent substance in the discharge cell 12 is discharged. The film thickness of 34 is uneven, and even the bottom surface of the discharge cell 12 has a cavity 36, so this The pixel's luminous efficiency is poor, and even the problem of the g-panel flash point is generated. SUMMARY OF THE INVENTION In order to solve the problem of uneven thickness of the fluorescent substance at the bottom of the discharge cell caused by bubbles in the prior art plasma display during the phosphor printing process, it is an object of the present invention to provide a barrier having a protrusion. The wall structure and the protruding portion allow air to be discharged from both sides when the phosphor is filled, and the phosphor material can be uniformly applied to the bottom surface of the discharge cell and the side surface of the barrier wall surrounding the discharge cell. In order to solve the problem of poor luminous efficiency of the prior art plasma display, and even to produce the problem of the flash point of the panel, one of the objects of the present invention is to provide a barrier wall structure having a protrusion to eliminate the flash point of the panel and improve the luminous efficiency. SUMMARY OF THE INVENTION One object of the present invention is to provide a barrier wall structure having a protruding portion of a rear panel of a plasma display to increase the bulk density of a fluorescent substance of a discharge cell, thereby increasing the discharge space of the discharge cell. SUMMARY OF THE INVENTION One object of the present invention is to provide a barrier wall structure having a protruding portion of a rear panel of a plasma display and having a height difference between the lateral barrier wall and the longitudinal barrier wall to improve the pumping efficiency when the phosphor is filled. Therefore, the plasma block of the present invention has a protruding portion structure with a protruding portion to improve the uneven thickness of the fluorescent material of the discharge cell, and can increase the bulk density of the fluorescent material of 200823950 to increase the discharge space. In turn, the problem of the flash point of the panel is solved, and the process yield and luminous efficiency of the plasma display are improved. In order to achieve the above object, an embodiment of the present invention provides a plasma display rear panel structure, including: - a substrate; a plurality of electrodes are disposed in parallel on the substrate; a dielectric layer is disposed on the substrate and covers the electrodes; The barrier layer is disposed on the dielectric layer; the plurality of longitudinal barriers are disposed on the 'cladding layer, and the towel, the lateral barrier wall and the longitudinal barrier wall are interlaced> into a lattice-shaped plurality of discharge cells, wherein each— The discharge cell system is surrounded by two adjacent lateral barrier walls and two adjacent longitudinal barrier walls (four) and the bottom surface thereof is a dielectric layer surface, and two adjacent lateral barrier walls and two adjacent longitudinal barrier walls At least one of the protrusions has a protrusion toward the per-discharge cell; and a phosphor is applied to the bottom surface of the discharge cell, to the lateral barrier wall of the discharge cell, and to the longitudinal barrier of the discharge cell. The side. [Embodiment] Please refer to FIG. 2A to FIG. 2C of the present invention-embodiment, FIG. 2A is a top view of a partial discharge cell, and FIG. 2B is a top view of a single-discharge cell, 2C. Figure 3 is a schematic perspective view of a single discharge cell, the lateral barrier wall 46 and the longitudinal barrier wall are mutually distorted to form a crystalline cell-shaped discharge cell 42, each of which is a two adjacent longitudinal barrier wall 44 and two phases. The space surrounded by the adjacent lateral barrier walls 46 is alternately surrounded. In this embodiment, the two adjacent lateral barrier walls 46 respectively have a protrusion 4 〇 toward each discharge cell 42 ′ and the height of the protrusion 40 may be less than or Equal to the height of the lateral barrier wall 46, in this embodiment, the height of the projection 40 is less than the height of the lateral barrier wall 46, as shown in Figure 2c. In this embodiment, the phosphor is applied to the bottom surface of the discharge cell and the side of the barrier surrounding the discharge cell to increase the coating area and thereby improve the luminous efficiency of pDp, and the phosphor coating of this embodiment The cloth may be aligned and printed by a screen corresponding to the discharge cell. FIG. 2D is a schematic diagram of filling the phosphor ink in the discharge cell according to an embodiment of the present invention. The plurality of electrodes 50 are disposed in parallel on the glass substrate 48. Above, a dielectric layer (Dielectric 200823950 48 and covering electrode 50, a plurality of lateral barrier walls - 42, one or two knives 5 曰 8 $ _ two adjacent lateral direction 11 and the space between the partition walls 46 is a discharge cell a The bar phosphor ink 56 is filled into the discharge cell 42 through the mesh of a lattice-like mesh plate 54, because the mesh plate 54 is 蝻a, s wood, and ^μ The opening of the cell 42 is small, so the fluorescent light = ink fills the surface to the protruding portion 40 of the lateral blocking wall 46, and the air escapes from both sides of the protrusion 40. Therefore, no bubble is formed and the film thickness is formed after the heat is evaporated. The light-retaining material of the hook is as shown in Figure 2, and the camp light I t (4) covers the lateral barrier wall 46. Side surface of the projecting portion 4G, the cover 42 is in the bottom surface of the discharge cell is also covered ^^

Fig. 3 is a view showing the size design of the wall portion of the present invention in the embodiment of the present invention. In this embodiment, the protrusion of the lateral barrier wall 46 is /, The lion extension, the trapezoidal long side and the perforation barrier are connected, the ladder '= shape long side opposite and facing the discharge cell 42, the thickness g of the protrusion 4〇 is trapezoidal ^ side of the short side of the hybrid _ vertical distance 'trapezoidal length The dimension E of the side is 2% to 5% of the discharge cell \ = width W1, and the dimension F of the trapezoidal short side is 10% to 3% of the % of the discharge cell 42 and the thickness G of the protrusion 4〇 For the longitudinal direction of the discharge cell 42 = 5% to 20% of the W2, the relevant dimensional design requirements are listed in Table 1.尺寸 Dimensional design—G 5% to 20% W2 F 10% to 30% E 20% to 50% W! Table 1 • Dimensional design requirements for the discharge cell of one embodiment of the present invention. In order to verify the efficacy of the present invention, the present invention produced a sample, and measured the thickness of the camping material film of a sample of the 2008 200823950 and the control group of the present invention, and compared the reference to the first embodiment of the present invention and the control group. The size bars of the samples are listed in Table 2. ^ back

Table 2. Dimensions of samples of the present invention and the control group. The invention uses the same phosphor ink filling amount and the same screen printing process conditions

Do not apply the county material to the sample of this embodiment in the control field. In order to measure the film thickness of the substance, the slab must be spliced before photographing and measurement. N

Please refer to FIG. 4A to FIG. 4H. FIG. 4A is a schematic view showing the position of the splitting position of the single discharge unit cell of the control group, and the camping light substance 34 is applied to the longitudinal barrier wall 14 and the lateral barrier wall 16 of the discharge unit cell 12. On the side, 'W' is a two-way split line along the longitudinal centerline of the discharge cell 12, and "bb"' is a longitudinal split line along the transverse centerline of the discharge cell 12. The first plot is a single control group. - the position and size of the discharge cell along the "a_a," transverse splitting line splitting, "Wa, is the width of the discharge cell 12", "Ha" is the longitudinal barrier of the discharge cell 12 The height of 14 , "Q", "La", and "Ra" respectively represent the measurement of the camping light material 34 in the center of the bottom of the electric cell 12, the center of the height of the left blocking wall, and the center of the height of the right blocking wall. Figure 4C is a schematic cross-sectional view of the discharge cell 12 along "(4), longitudinal split line split, similar to 4B gj, "w, is the longitudinal width of the discharge cell 12, Ha" is the discharge cell The height of the lateral barrier wall 16 of 12, "c", and Ra respectively represent the measurement fluorescence The film 34 is at the center of the bottom of the electric cell 12, at the center of the height of the left barrier wall, and at the center of the height of the right barrier wall. FIG. 4D is a schematic view showing the position of the split of the single discharge cell of the present embodiment, Horizontal 9 200823950

Each of the blocking walls 46 has a protruding portion 40 facing the discharge cell 42, and the phosphor material 64 is applied to the side of the longitudinal barrier wall 44 of the discharge cell 42 and the lateral barrier wall 46, "〇c,,, is discharged along ^ The transverse split line of the longitudinal centerline of the unit cell 42, "d_d,", is the longitudinal split line along the discharge cell, the directional, and the midline. 4E is a schematic cross-sectional view of the single-discharge cell 42 of the present embodiment along the C_C 裂 cleavage line, "Wb" is the lateral width of the discharge cell 42, ''Hb,, ^ is the longitudinal direction of the electric cell 42 The height of the barrier wall 44, ",,, "w,, and "仏, respectively, represent the fluorescent material 64 in the center of the bottom of the electric cell 42 and the center of the left barrier wall, The obtained lining; 4F ® is the single discharge direction of the present embodiment, and the longitudinal cross-sectional schematic view 'Wc' is the vertical high-production of the discharge cell 42. The light-emitting material f 64 is at the center of the bottom of the electric cell 42 and left. The thickness of the door of the side barrier wall is the thickness of the center of the right side and the right side of the barrier wall. The discharge cell 42 of the example is along the "d_d" photo, which is provided here for familiarity with the art. The longitudinal section can be used to understand the present invention more specifically. , and the side is not in comparison with each other. The amount of fluorescent material in the opposite group is shown in Table 3. Film thickness (μπι) Side to bottom ratio Seven, the longitudinal section of the rifting line La5 44.02 Table III · Control group

RaVQ 3.25 Measurement result of film thickness of fluorescing material Ύ49 Cross-section of cleavage line---&_^_Ral plln 31.57 tmJ Ra/Ca ~Ζ52~ 200823950 Measurement results of film thickness of phosphor material in this example In Table 4. Along the "d_d" 'split line# The transverse section of the longitudinal section along the "cc"' rifting line is L〇Cc R〇Lb cb Rb (μΐΏ) 35.25 12.75 36.07 27.02 12.17 27 34 Side to bottom ratio Lc/Cc R〇/ Cc Lb/Cb Rk/Ck 2.76 2.83 2.22 2.25 Table 4. Measurement results of the film thickness of the fluorescent material of this example. Therefore, under the same phosphor ink filling amount and the same screen printing process conditions, the thickness of the fluorescent material film of the control group and the present embodiment is compared, and the present embodiment can be found from Table 3 and Table 4. The phosphor material has a small film thickness and the side-to-bottom ratio is closer to the ideal value of 21, and it is known that the bulk density is better and there is a larger discharge space. Therefore, one of the features of the present invention is that the lateral barrier wall surrounding the discharge cell has a protrusion toward the discharge cell, and the protrusion allows the air to be discharged from both sides when the phosphor is filled in. The towel field creates a phenomenon of uneven thickness of the material at the bottom of the red discharge cell, and can increase the bulk density of the fluorescent material to increase the discharge space. According to the spirit of the present invention, as long as at least two of the adjacent longitudinal barrier walls surrounding the two adjacent buffer walls of the discharge cell have a projection toward the discharge cell, the phosphor can be uniformly coated. There is no limitation on the bottom surface of the discharge cell and the surface of the barrier cell surrounding the discharge cell, and the shape of the protrusion of the barrier wall is not limited. For example, in the foregoing embodiment, the two lateral barrier walls of the discharge cell are surrounded. The protruding portion is a trapezoidal extension, and the two longitudinal barrier walls have no protrusion. '5th is the top view of the single-discharge cell of the present invention—the two adjacent cells are surrounded by two adjacent longitudinal barrier walls 74 to form a discharge cell 72, two One of the barrier walls 76 has a projection 70 facing the discharge cell 72, and the profile of the projection portion 2008 2008239 is a rectangular parallelepiped. Figure 6 is a top plan view of a single discharge cell of an embodiment of the present invention, two adjacent lateral barrier walls 86 and two adjacent longitudinal barrier walls 84 surrounding a discharge cell 82, two lateral barrier walls 86 and two Adjacent longitudinal barrier walls 84 each have a projection 80 that faces the discharge cell 82, and the profile of the projection 80 is a partially circular extension. In addition, the lateral barrier wall and the longitudinal barrier wall may be further designed to have a height difference to improve the pumping efficiency when the phosphor is filled, and FIG. 7A is a perspective view of a single discharge unit cell according to an embodiment of the present invention. Two adjacent longitudinal barrier walls

94 is interleaved with two adjacent lateral barrier walls 96 to form a discharge cell %, and the lateral barrier wall 96 has a protrusion 9 〇 toward the discharge cell 92. In this embodiment, the height of the lateral barrier wall 96 is smaller than the longitudinal barrier wall. 94. Fig. 7B is a perspective photograph of a partial discharge cell of the present embodiment, and a solid photograph is provided here for comparison with the schematic diagram of Fig. 7A, and the present invention can be more specifically understood. In summary, the barrier wall structure having the protruding portion of the rear panel of the electric display of the present invention can improve the uneven thickness of the fluorescent material at the bottom of the discharge cell caused by the bubble in the phosphor __, and can increase the county The material_density density clearly increases the discharge space, thereby solving the problem of the flash point of the panel, improving the process yield and luminous efficiency of the electric_displayer; and, the lateral barrier wall non-directional barrier wall can further improve the height difference to improve The pumping efficiency when the phosphor is filled. The embodiments described above are merely illustrative of the technical idea and the specific purpose of the present invention, and those skilled in the art can understand the contents of the present invention and I can limit the patent scope of the present invention by According to the spirit of the present invention, it is still to be covered by the present invention. 12 200823950 [Simple Description of the Drawing] FIG. 1A is a top view of a partial discharge cell of the prior art. Figure 1B is a top plan view of a prior art single discharge cell. Figure 1C is a perspective schematic view of a prior art single discharge cell. Figure 1D is a schematic illustration of prior art filling of a phosphor paste in a discharge cell. Fig. 1E is a schematic view showing the uneven thickness of the phosphor material of the prior art.

Fig. 2A is a top plan view showing a partial discharge cell of an embodiment of the present invention. 2B is a top plan view of a single discharge cell of an embodiment of the present invention. 2C is a perspective view of a single discharge cell of an embodiment of the present invention. Fig. 2D is a schematic view showing the filling of the phosphor paste in the discharge cell of the present invention. Fig. 2E is a schematic view showing the coating of a fluorescent substance according to an embodiment of the present invention. Figure 3 is a top plan view of a single-discharge cell of the present invention. Figure 4A is a schematic top view of the position of the split of a single discharge cell of the control group. Figure 4B is a schematic cross-sectional view of the measurement position and size of a single discharge cell of the control group along the 'ϋ, transverse split line split. Figure 4C is a schematic cross-sectional view of the position and size of a single discharge cell of the control group along the "b-7," longitudinal splitting lobes. Figure 4D is a cleavage position of a single discharge cell of an embodiment of the present invention. Ϊ 图 是 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一 单一A longitudinal section photograph of the "bb" 'longitudinal split line of Fig. 4A. Fig. 4H is a longitudinal section photograph of the discharge cell 42 of the embodiment of the present invention along the "dd"' longitudinal split line of Fig. 4D. Figure 5 is a top plan view of a single discharge cell of an embodiment of the present invention. Figure 6 is a top view of a single discharge cell of an embodiment of the present invention. Figure 7A is a single discharge crystal of an embodiment of the present invention. Fig. 7B is a perspective photograph of a partial discharge cell of an embodiment of the present invention. [Description of main components] 12, 42, 72, 82, 92 discharge cells 14, 44, 74, 84, 94 Longitudinal barrier walls 16, 46, 76, 86, 96 Transverse barrier 18, 48 Glass substrate 20, 50 Electrode 22, 52 Dielectric layer 24, 54 Stencil 26, 56 Fluorescent ink 28, 58 Scraper 32 Bubble 34, 64 Fluorescent material 36 Cavity 14 200823950 40, 70 , 80, 90 protrusions a-a5, bb, cc, d_d, split line E, F size Ca, Ca', Cb, Cc film thickness La Λ La ~ Lb Λ L 〇 film thickness G thickness Ha, Ha' , Hb, He height Ra, Ra', Rb, Rc film thickness Wi ^ W2 width n, n width

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Claims (1)

200823950 X. Patent application scope: 1. A plasma display rear panel structure comprising a substrate; a plurality of electrodes disposed in parallel on the substrate; an "electric layer" disposed on the substrate and covering the electrodes; a plurality of lateral barriers a wall disposed on the dielectric layer; and a plurality of longitudinal barrier walls disposed on the dielectric layer; wherein the lateral barrier walls/the two longitudinal barrier walls are interlaced to form a lattice-shaped plurality of discharge cells Wherein each of the discharge cell systems is adjacent to the lateral barrier walls and two adjacent _4t, = interlaced spaces and the bottom surface of the discharge cell is the surface of the dielectric layer, and some of the barrier walls And the two adjacent ones of the longitudinal barrier walls are oriented toward each of the discharge cells. 〜、大二· The structure of the plasma display back plate as described in the claim The barrier walls each have a protrusion toward each of the discharge cells. The k 16 200823950 9 is adjacent to the electric micro-mirror rear plate structure according to claim 1, wherein the protrusion type system As a trapezoidal extension, where The trapezoidal long side of the trapezoidal extension is connected to the transverse-partition or the ship-to-ship of the discharge cell, and the side connected to the occupational crystal is a -th-side, perpendicular to the first side of the discharge cell a second side, the length of the first side is a first width, the second side: "first-width" and the length of the long side of the lion is the % of the first width - the trapezoidal short side of the extension The trapezoidal short side is opposite to the trapezoidal long side, and the trapezoidal short side has a size of 10% to 30% of the first width, and the protrusion and the trapezoidal long side and the lion's side are _straight distance And the protrusion is 5% to 20% of the width of the ladder. The second embodiment of the plasma display back panel structure according to claim 1, wherein the height of the outlet portion is not greater than the barrier The structure of the plasma display rear panel of claim 1 is the same as the height of the longitudinal barrier walls. μ2 lateral barrier wall U is as described in detail. The rear panel structure of the plasma display, wherein the height has a height difference from the longitudinal barrier walls. The plasma display device according to Item 1 is glass. The material of the substrate 14 is as described in the claim item! The structure of the plasma display back plate, and the method for manufacturing the resistance = the method of spraying or side method _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Parallelly disposed on the substrate, SC: disposed on the substrate and covering the electrodes; a plurality of *-blocking walls disposed on the dielectric layer; 17 200823950 a plurality of longitudinal barrier walls disposed on the dielectric layer Wherein the lateral barrier walls and the longitudinal barrier walls are interlaced to form a lattice-shaped plurality of discharge cells, wherein each of the discharge cells is two adjacent lateral barrier walls adjacent to each other The longitudinal barriers 2 and the bottom surface thereof are the surface of the dielectric layer, and the two adjacent lateral resistances====the longitudinal barrier walls, at least any of which has a protrusion-directed-fluorescent substance, coated On the bottom surface of the discharge cells 17. Metal 18. The electrical requirements of item 16 clear polyethylene-based display glass. Wherein the material of the substrate f is the rear panel of the plasma display "= some laterally depends on the __, _ the discharge cell of the serving cell. 17" as requested 瑁 «一 侧 slope side wall side The plasma described in item 16 of e-month is shown as a rectangular parallelepiped, a portion 1, and wherein the profile of the projection is a P-circular extension, a trapezoidal extension thereof, or a combination thereof. 18