CN1312723C - plasma light emitting panel - Google Patents

Abstract

A plasma light emitting panel includes: a first substrate, a second substrate, a fluorescent layer disposed on the lower surface of the first substrate, a plurality of electrodes disposed on an upper surface of the second substrate and parallel to each other, a dielectric layer covering the plurality of electrodes, a discharge chamber disposed between the first substrate and the second substrate, and at least one heat dissipation structure disposed on a lower surface of the second substrate.

Description

plasma light emitting panel

technical field

The invention relates to a plasma light-emitting panel, in particular to a plasma light-emitting panel including a heat dissipation structure.

Background technique

Plasma light-emitting panel is a kind of planar light emitter that generates light through gas discharge, which is composed of multiple discharge cells filled with inert gases such as neon (Ne) and xenon (Xe) or helium (He) and xenon. Composition, and the inert gas in each discharge cell, after being excited by an electric field, can generate ultraviolet light to irradiate on the phosphor (phosphor) on the surface of each discharge cell, and then pass through the red and green reflected by different phosphors. With the blue visible light, combined with the design of the driving circuit and image signal processing, the visible light of the three primary colors is mixed to form a colorful picture, and according to the position of the phosphor, it can be divided into reflective plasma light emitting There are two types of panel and transmissive plasma light emitting panel. Plasma light-emitting panels are large and thin, and have the advantages of low radiation and wide viewing angles, so they will be the mainstream of large-size light-emitting devices in the future.

Referring to FIG. 1 , FIG. 1 is a schematic cross-sectional view of a known reflective plasma light-emitting panel 10 . As shown in Figure 1, the reflective plasma light-emitting panel 10 is arranged under a liquid crystal display panel (LCD panel, not shown), and the liquid crystal display panel and the reflective plasma light-emitting panel 10 utilize a frame (bezel, not shown) ) are assembled and fixed together.

As shown in Figure 1, the reflective plasma light-emitting panel 10 includes: a first substrate 14, a second substrate 16 parallel to the first substrate 14, a plurality of lower surfaces 14a arranged on the first substrate 14 and parallel to each other. The electrodes 18, a dielectric layer 20 completely covering the surfaces of the plurality of electrodes 18, a reflective layer 22 disposed on an upper surface 16b of the second substrate 16, a fluorescent layer 24 completely covering the reflective layer 22, and A discharge chamber 26 is disposed between the first substrate 14 and the second substrate 16 .

Usually, both the first substrate 14 and the second substrate 16 are glass substrates, and the electrodes 18 are made of metals such as aluminum and copper. The dielectric layer 20 is made of silicon dioxide, and the reflective layer 22 is a sintered body made of aluminum oxide, titanium dioxide and glass. As mentioned above, the discharge chamber 26 is filled with an inert gas or an inert gas mixture. In consideration of function and cost, the discharge chamber 26 is usually filled with neon (Ne) and xenon (Xe) or helium (He) Inert gas mixture with xenon.

Referring to FIG. 2 , FIG. 2 is a schematic cross-sectional view of a known transmissive plasma light-emitting panel 30 . As shown in Figure 2, similar to the reflective plasma light-emitting panel 10 in Figure 1, the transmissive plasma light-emitting panel 30 is also arranged under a liquid crystal display panel (not shown), and the liquid crystal display panel and the reflective plasma light-emitting panel The panel 30 is also assembled and fixed by a frame (not shown).

As shown in FIG. 2, the transmissive plasma light-emitting panel 30 includes: a first substrate 34, a second substrate 36 parallel to the first substrate 34, and a plurality of upper surfaces 36b of the second substrate 36 parallel to each other. The electrodes 38, a dielectric layer 40 completely covering the surfaces of the plurality of electrodes 38, a phosphor layer 44 disposed on the lower surface 34a of the first substrate 34, and a phosphor layer 44 disposed between the first substrate 34 and the second substrate 36 The discharge chamber 46.

The difference between the reflective plasma light-emitting panel 10 in FIG. 1 and the transmissive plasma light-emitting panel 30 in FIG. 2 is that the fluorescent layer 24 in FIG. 1 is located on the lower second substrate 16 and a reflective layer needs to be added. 22, while the fluorescent layer 44 in FIG. 2 is located on the upper first substrate 34 and the reflective layer 22 in FIG. 1 can be omitted. Since the components and functions of the other components included in the transmissive plasma light emitting panel 30 are the same as those of the reflective plasma light emitting panel 10 , they will not be further described here.

However, no matter it is a reflective or transmissive plasma light-emitting panel, the surface temperature of the light-emitting surface is usually as high as 40°C to 60°C, which often leads to difficult heat dissipation under long-term operation, and easily damages the liquid crystal display panel. Negative impact, reducing the display quality and service life of the liquid crystal display panel. Therefore, how to effectively improve the heat dissipation efficiency of the plasma light-emitting panel has become an urgent and important issue.

Contents of the invention

In view of this, the object of the present invention is to provide a plasma light-emitting panel to solve the above-mentioned problem of difficult heat dissipation of the known plasma light-emitting panels.

In the preferred embodiment of the present invention, the plasma light-emitting panel is arranged under a liquid crystal display panel. The plasma light-emitting panel includes: a first substrate, a second substrate disposed below the first substrate, a phosphor layer disposed on the lower surface of the first substrate, and a plurality of phosphor layers disposed on one of the second substrates. Electrodes parallel to each other on the surface, a dielectric layer covering the plurality of electrodes, a discharge chamber arranged between the first substrate and the second substrate and filled with an inert gas inside, and at least one device On the lower surface of the second substrate, there is a heat dissipation structure for increasing the heat dissipation area of the plasma light emitting panel.

Since the plasma light-emitting panel of the present invention is respectively provided with a heat dissipation structure on the lower surface of the second substrate, the heat-dissipating area of the plasma light-emitting panel can be greatly increased, so it can be achieved by having a high heat transfer coefficient without greatly increasing the manufacturing cost. The heat-dissipating structure composed of the material removes the heat generated by the plasma light-emitting panel during operation, so as to ensure the display quality of the liquid crystal display panel.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a conventional reflective plasma light-emitting panel.

FIG. 2 is a schematic cross-sectional view of a conventional transmissive plasma light-emitting panel.

FIG. 3 is a schematic cross-sectional view of the reflective plasma light-emitting panel in the first embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of the transmissive plasma light-emitting panel in the first embodiment of the present invention.

Explanation of the symbols of the accompanying drawings:

10 reflective plasma light emitting panel 14 first substrate

14a lower surface 16 second substrate

16b upper surface 18 electrodes

20 dielectric layer 22 reflective layer

24 fluorescent layer 26 discharge chamber

30 Transmissive plasma light-emitting panel 34 First substrate

34a lower surface 36 second substrate

36b upper surface 38 electrodes

40 Dielectric layer 44 Phosphor layer

46 discharge chamber

50 reflective plasma light-emitting panels

52 first substrate 52a lower surface

54 second substrate 54a lower surface

54b upper surface 56 electrodes

58 dielectric layer 60 reflective layer

62 fluorescent layer 64 discharge chamber

66 heat dissipation structure

70 transmissive plasma light emitting panel 72 first substrate

72a lower surface 74 second substrate

74a lower surface 74b upper surface

76 fluorescent layers 78 electrodes

80 dielectric layer 82 discharge chamber

84 cooling structure

Detailed ways

Referring to FIG. 3 , FIG. 3 is a schematic cross-sectional view of the reflective plasma light-emitting panel 50 in the first embodiment of the present invention. As shown in Figure 3, the reflective plasma light-emitting panel 50 is arranged under a liquid crystal display panel (not shown), and the liquid crystal display panel and the reflective plasma light-emitting panel 50 are assembled using a frame (bezel, not shown) And the combination is fixed. The reflective plasma light-emitting panel 50 includes: a first substrate 52, a second substrate 54 disposed below the first substrate 52, a plurality of electrodes 56 disposed on the lower surface 52a of the second substrate 52 and parallel to each other, a covering A dielectric layer 58 on the surface of a plurality of electrodes 56, a reflective layer 60 disposed on an upper surface 54b of the second substrate 54, a fluorescent layer 62 covering the surface of the reflective layer 60, a phosphor layer 62 disposed on the first substrate 52 and the second The discharge chamber 64 between the substrates 54 and at least one heat dissipation structure 66 disposed on the lower surface 54 a of the second substrate 54 .

As shown in FIG. 3 , the first substrate 52 and the second substrate 54 are two parallel glass substrates. The electrode 56 is made of aluminum or copper, and the dielectric layer 58 is made of silicon dioxide. The reflective layer 60 is a sintered body formed by sintering aluminum oxide, titanium dioxide and glass, and the discharge chamber 64 is filled with an inert gas or an inert gas mixture. Generally speaking, in consideration of function and cost, the discharge chamber 66 is usually filled with an inert gas mixture of neon (Ne) and xenon (Xe) or helium (He) and xenon.

Since the surface temperature of the reflective plasma light emitting panel 50 is usually as high as 40° C. to 60° C. during operation, the function of the heat dissipation structure 66 is to increase the heat dissipation area of the reflective plasma light emitting panel 50 . In a preferred embodiment of the present invention, the heat dissipation structure 66 is made of a metal layer including copper or zinc, an alloy layer including copper-zinc alloy or copper-aluminum alloy, or a material with a high heat transfer coefficient, The columnar protrusion structure is pasted on the lower surface 54a of the second substrate 54 by an adhesive (not shown), as shown in FIG. 3 . As mentioned above, the function of the heat dissipation structure 66 is to increase the heat dissipation area of the reflective plasma light-emitting panel 50, and the shape of the heat dissipation structure 66 in other embodiments of the present invention can also present a point-like protrusion structure (not shown). out) or a columnar protrusion structure (not shown) including a plurality of pin structures on each side, or even any shape that can increase the heat dissipation area of the reflective plasma light emitting panel 50 .

In addition, based on the consideration of process integration, the heat dissipation structure 66 can also be formed by performing an etching process on the lower surface 54a of the second substrate 54, and the aforementioned columnar protrusions can be formed on the lower surface 54a of the second substrate 54. structure, the point-like protrusion structure or the heat dissipation structure 66 of the columnar protrusion structure including a plurality of needle-like structures on each side, or each of the protrusion structures can be etched here by electroplating or other methods after the etching process A metal layer including copper or zinc, an alloy layer including copper-zinc alloy or copper-aluminum alloy, or a material layer with a high heat transfer coefficient is plated on the lower surface 54a of the lower surface 54a to form the heat dissipation structure 66 .

Referring to FIG. 4 , FIG. 4 is a schematic cross-sectional view of a transmissive plasma light-emitting panel 70 in a second embodiment of the present invention. As shown in FIG. 4, similar to the reflective plasma light emitting panel 50 in FIG. Frames (not shown) are assembled to hold together. The transmissive plasma light-emitting panel 70 includes a first substrate 72, a second substrate 74 disposed below the first substrate 72, a fluorescent layer 76 disposed on the lower surface 72a of the first substrate 72, and a plurality of fluorescent layers disposed on the second substrate 72. Electrodes 78 parallel to each other on an upper surface 74b of the substrate 74, a dielectric layer 80 covering the plurality of electrodes 78, a discharge chamber 82 disposed between the first substrate 72 and the second substrate 74, and at least one The heat dissipation structure 84 is disposed on the lower surface 74 a of the second substrate 74 .

The difference between the reflective plasma light-emitting panel 50 in FIG. 3 and the transmissive plasma light-emitting panel 70 in FIG. 4 is only that the fluorescent layer 62 in FIG. 3 is located on the second substrate 54 below and a reflective layer needs to be added 60, and the fluorescent layer 76 in FIG. 4 is located on the upper first substrate 72 and the reflective layer 62 in FIG. 3 can be omitted. Since the components and functions of the other components included in the transmissive plasma light emitting panel 70 are the same as those of the reflective plasma light emitting panel 50 , they will not be further described here.

Compared with the known reflective plasma light emitting panel 10 and the transmissive plasma light emitting panel 30 in FIG. 1 and FIG. 2, the reflective plasma light emitting panel 50 and the transmissive plasma light emitting panel 70 in FIG. 3 and FIG. The lower surfaces 54a and 74a of the second substrates 54 and 74 are provided with heat dissipation structures 66 and 84 that can greatly increase the heat dissipation area of the reflective plasma light-emitting panel 50 and the transmissive plasma light-emitting panel 70, so that the manufacturing cost can be greatly increased. On the premise that the heat dissipation structures 66 and 84 made of materials with high heat transfer coefficients are used to dissipate the heat generated by the plasma light-emitting panels 50 and 70 during operation, the display quality of the liquid crystal display panel is ensured.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the patent of the present invention.

Claims (22)

1. A plasma light-emitting panel, located below a liquid crystal display panel, the plasma light-emitting panel comprising: a first substrate; a second substrate disposed below the first substrate; a phosphor layer disposed on the lower surface of the first substrate; a plurality of mutually parallel electrodes disposed on an upper surface of the second substrate; a dielectric layer overlying the plurality of electrodes; a discharge chamber disposed between the first substrate and the second substrate, the discharge chamber is filled with an inert gas; and at least one heat dissipation structure disposed on the lower surface of the second substrate, It is characterized in that: the heat dissipation structure is a columnar protrusion structure or a dot-like protrusion structure. 2. The plasma light-emitting panel as claimed in claim 1, wherein the first substrate and the second substrate are two glass substrates parallel to each other. 3. The plasma light emitting panel as claimed in claim 1, wherein the electrode comprises aluminum or copper. 4. The plasma light emitting panel as claimed in claim 1, wherein the dielectric layer is made of silicon dioxide. 5. The plasma light emitting panel as claimed in claim 1, wherein the heat dissipation structure is used to increase the heat dissipation area of the plasma light emitting panel. 6 . The plasma light-emitting panel as claimed in claim 5 , wherein the columnar protrusion structure comprises a plurality of needle-shaped structures, and the needle-like structures are disposed on each side of the columnar protrusion structure. 6 . 7. The plasma light-emitting panel as claimed in claim 6, wherein the heat dissipation structure comprises a metal layer, or an alloy layer, or a material layer with a high heat transfer coefficient. 8. The plasma light-emitting panel as claimed in claim 7, wherein the metal layer comprises a copper metal layer or a zinc metal layer, and the alloy layer comprises a copper-zinc alloy layer or a copper-aluminum alloy layer . 9. The plasma light emitting panel as claimed in claim 6, wherein the heat dissipation structure is formed by etching the lower surface of the second substrate. 10. The plasma light-emitting panel as claimed in claim 9, wherein the surface of the heat dissipation structure comprises a metal layer, or an alloy layer, or a material layer with a high heat transfer coefficient. 11. The plasma light-emitting panel as claimed in claim 10, wherein the metal layer comprises a copper metal layer or a zinc metal layer, and the alloy layer comprises a copper-zinc alloy layer or a copper-aluminum alloy layer . 12. A plasma light-emitting panel, the plasma light-emitting panel is arranged under a liquid crystal display panel, and the plasma light-emitting panel comprises: a first substrate; a second substrate disposed below the first substrate; a plurality of electrodes disposed on the lower surface of the first substrate; a dielectric layer covering the surfaces of the plurality of electrodes; a reflective layer disposed on an upper surface of the second substrate; a phosphor layer disposed on the reflective layer; a discharge chamber disposed between the first substrate and the second substrate, the discharge chamber is filled with an inert gas; and at least one heat dissipation structure disposed on the lower surface of the second substrate, The heat dissipation structure is a columnar protrusion structure or a dot-like protrusion structure. 13. The plasma light-emitting panel as claimed in claim 12, wherein the first substrate and the second substrate are two parallel glass substrates. 14. The plasma light emitting panel as claimed in claim 12, wherein the electrode comprises aluminum or copper. 15. The plasma light-emitting panel as claimed in claim 12, wherein the dielectric layer is made of silicon dioxide. 16. The plasma light emitting panel as claimed in claim 12, wherein the heat dissipation structure is used to increase the heat dissipation area of the plasma light emitting panel. 17. The plasma light-emitting panel as claimed in claim 16, wherein the columnar protrusion structure comprises a plurality of needle-like structures, and the structures are disposed on each side of the columnar protrusion structure. 18. The plasma light emitting panel as claimed in claim 17, wherein the heat dissipation structure comprises a metal layer, an alloy layer or a material layer with high heat transfer coefficient. 19. The plasma light-emitting panel as claimed in claim 18, wherein the metal layer comprises a copper metal layer or a zinc metal layer, and the alloy layer comprises a copper-zinc alloy layer or a copper-aluminum alloy layer . 20. The plasma light emitting panel as claimed in claim 17, wherein the heat dissipation structure is formed by etching the lower surface of the second substrate. 21. The plasma light-emitting panel as claimed in claim 20, wherein the surface of the heat dissipation structure comprises a metal layer, an alloy layer or a material layer with a high heat transfer coefficient. 22. The plasma light-emitting panel as claimed in claim 21, wherein the metal layer comprises a copper metal layer or a zinc metal layer, and the alloy layer comprises a copper-zinc alloy layer or a copper-aluminum alloy layer .

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