CN1585076A - Cold Cathode Flat Lamp - Google Patents

Abstract

The invention relates to a cold cathode flat lamp, which mainly comprises a first base material, a plurality of electrode groups, a second base material, a plurality of barrier ribs, a phosphor and a discharge gas. The electrode group is arranged on the first base material, and the second base material is arranged above the first plate-shaped base material. The barrier ribs are arranged between the first substrate and the second substrate to form a plurality of closed cavities, and each electrode group is respectively positioned in the closed cavities. The fluorescent body is arranged on the inner walls of the closed cavities, and the discharge gas is arranged in the closed cavities. The present invention can separate the plasma clusters generated by each electrode set and avoid mutual interference by the arrangement of the barrier rib; the arrangement of the plurality of barrier ribs prevents the barrier ribs from interfering with each other during the discharge period, and the barrier ribs increase the coating area of the fluorescent material, thereby improving the luminous efficiency and uniformity of the cold cathode flat lamp, being more practical and having industrial utilization value.

Description

Cold Cathode Flat Lamp

technical field

The invention relates to a cold cathode planar lamp in lamps in the field of basic electrical components, in particular to a cold cathode which can separate the plasma clusters generated by each electrode group so that they will not interfere with each other during discharge flat light.

Background technique

With the development of the industry, digital tools such as mobile phones, digital cameras, digital video cameras, notebook computers, and desktop computers are all developing in a more convenient, multi-functional and beautiful direction. However, the display screens of mobile phones, digital cameras, digital video cameras, notebook computers, and desktop computers are indispensable human-machine communication interfaces. The display screens of the above products will bring more convenience to the user's operations. convenient. In recent years, most of the display screens on mobile phones, digital cameras, digital video cameras, notebook computers and desktop computers use LCD panels as the mainstream. function, so a back light module (back light module) must be provided under the liquid crystal display panel to provide a light source to achieve the display function.

Since the cold-cathode flat lamp has good luminous efficiency and uniformity, and can provide a large-area surface light source, the cold-cathode flat lamp has been widely used in the backlight source of the liquid crystal display panel and even other application fields. The cold cathode flat lamp is a plasma light-emitting component, which mainly utilizes a high voltage difference between the electrode groups to excite the passive gas between the cathode and the anode in the gas discharge cavity into high-energy gas excitatory molecules, Ions and electrons, these high-energy gas excimer molecules, ions and electrons are the so-called plasma. Afterwards, the excited atoms in the plasma will release energy in the form of ultraviolet radiation, and the emitted ultraviolet light will further excite the phosphor in the cold cathode flat lamp to emit visible light.

Please refer to FIG. 1 , which is a schematic structural diagram of a conventional cold-cathode flat lamp. The existing known cold cathode flat lamp 100 is mainly composed of a first substrate 110, a second substrate 120, a side strip 130, a plurality of electrode groups 140 (three groups are shown in this figure), a fluorescent body 150 and a discharge gas 160. Wherein, the side bar 130 is arranged between the first base material 110 and the second base material 120 and connected with the edges of the first base material 110 and the second base material 120 to form a closed cavity 170 . In addition, a plurality of spacers (not shown) can also be added between the two plate-shaped substrates to strengthen the structural strength of the central area of the cold-cathode flat lamp 100, so that the cold-cathode flat lamp 100 can withstand The external atmospheric pressure forms the discharge space required for gas discharge.

Please continue to refer to FIG. 1, the electrode set 140 is composed of an anode 140a and a cathode 140b. The anode 140 a and the cathode 140 b are usually strip electrodes and are arranged in parallel on the first substrate 110 . The electrode set 140 is usually covered with a layer of dielectric layer 180 to protect the electrode set 140 from damage due to ion impact. In addition, a discharge gas 160 is injected into the sealed cavity 170, and the discharge gas 160 is usually xenon gas (Xe), neon gas (Ne), argon gas (Ar) or other inert gas. In addition, the phosphor 150 is disposed on the inner wall of the airtight cavity 170 , such as on the surface of the second substrate 120 and the surface of the dielectric layer 180 .

During the lighting process of the cold-cathode planar lamp, a high voltage difference is applied between the two electrodes of the electrode group 140 to excite the passive gas between the cathode and the anode in the gas discharge chamber 170 into plasma. state of gas. Afterwards, the excited atoms in the plasma release energy by emitting ultraviolet rays, and the emitted ultraviolet rays further excite the phosphor 150 on the inner wall of the sealed cavity 170 to generate visible light. However, the electrodes of the conventionally known electrode groups are in a common discharge space (i.e. the discharge gas flows between the electrode groups). When (Blink), part of the plasmoids will migrate to the non-light-emitting area and interfere with each other, so that the light-emitting situation of each electrode group 140 cannot be correctly controlled.

It can be seen that the above-mentioned existing cold-cathode flat lamp still has many defects, and needs to be further improved urgently. In order to solve the problems of cold cathode flat lamps, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure for general products to solve the above problems. Obviously, it is a problem that relevant industry players are eager to solve.

In view of the above-mentioned defects existing in the existing cold-cathode flat lamps, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, in order to create a cold-cathode flat lamp with a new structure, The general existing cold cathode flat lamp can be improved to make it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The main purpose of the present invention is to overcome the defects of the above-mentioned existing cold cathode flat lamp, and provide a cold cathode flat lamp with a new structure. The main technical problem to be solved is to make it through the configuration of multiple barrier walls, The plasma clusters generated by each electrode group can be separated so that they will not interfere with each other during discharge, and the coating area of the phosphor can be increased by the barrier wall to improve the luminous efficiency of the cold cathode flat lamp and uniformity, so that it is more practical and has industrial utilization value.

The purpose of the present invention and the solution to its main technical problems are achieved by adopting the following technical solutions. A cold cathode flat lamp according to the present invention comprises: a first substrate; a plurality of electrode groups, the electrode groups are arranged on the first substrate, and each of the electrode groups has an anode and A cathode; a second base material, configured above the first plate-shaped base material; a plurality of barrier ribs, configured between the first substrate and the second substrate, and the first substrate is configured by the barrier ribs A plurality of airtight cavities are formed between the first substrate and the second substrate, wherein the electrode groups correspond to the airtight cavities respectively; a phosphor is disposed on the inner wall of the airtight cavities; and a discharge gas, Arranged in these airtight cavities.

The purpose of the present invention and the solution to its technical problems can also be further realized by adopting the following technical measures.

The aforementioned cold cathode flat lamp, wherein the barrier walls are strip-shaped, and the width of each of the barrier walls in contact with the first substrate is larger than that of each of the barrier walls in contact with the second substrate The width of the section.

In the aforementioned cold-cathode planar lamp, the cross-section of each of the barrier walls is triangular.

In the aforementioned cold-cathode planar lamp, the cross-section of each of the barrier walls is trapezoidal.

In the aforementioned cold-cathode planar lamp, the material of the barrier walls is a dielectric material.

In the aforementioned cold-cathode planar lamp, the anodes of the electrode groups are connected in series.

In the aforementioned cold-cathode planar lamp, the cathodes of the electrode groups are connected in series.

In the aforementioned cold-cathode planar lamp, the cathodes of the electrode groups are connected in series.

In the aforementioned cold-cathode flat lamp, the electrode groups are arranged on the first substrate in sequence of anode, cathode, anode, and cathode.

In the aforementioned cold-cathode flat lamp, the electrode groups are arranged on the first substrate in sequence of anode, cathode, cathode, and anode.

The aforementioned cold cathode flat lamp further includes a dielectric layer disposed between the electrode groups and part of the phosphor.

In the aforementioned cold cathode flat lamp, the discharge gas is an inert gas.

In the aforementioned cold cathode flat lamp, the inert gas includes xenon gas, neon gas, argon gas and the group formed by the combination of these gases.

In the aforementioned cold-cathode planar lamp, the material of the electrode groups is metal.

In the aforementioned cold cathode flat lamp, the metal material includes one of silver, copper and chrome-copper-chrome alloy.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. As can be seen from the above technical solutions, in order to achieve the aforementioned object of the invention, the main technical contents of the present invention are as follows:

The invention proposes a cold cathode planar lamp, which is mainly composed of a first base material, multiple electrode groups, a second base material, multiple barrier walls, a phosphor and a discharge gas. The electrode group is configured on the first substrate, and the electrode group includes an anode and a cathode. The second base material is disposed above the first plate base material. The barrier wall is arranged between the first substrate and the second substrate. Through the barrier of the barrier wall, a plurality of closed cavities are formed between the first substrate and the second substrate, and each electrode group is respectively corresponding to these closed cavities. . Phosphors are disposed on the inner walls of the closed cavities, and discharge gas is disposed in the closed cavities.

According to a preferred embodiment of the present invention, wherein the barrier rib is a strip structure, and the width of the portion of the barrier rib in contact with the first substrate is greater than the width of the portion of the barrier rib in contact with the second substrate. The shape is, for example, a triangle or a trapezoid. In addition, the material of the barrier rib is, for example, a dielectric material.

According to a preferred embodiment of the present invention, the anodes in each electrode group can be connected in series to provide the same voltage. In addition, the cathodes in each electrode group can also be connected in series to provide the same voltage. In addition, the electrode groups are sequentially arranged on the first substrate in the order of anode, cathode, anode, cathode or anode, cathode, cathode, anode, for example.

According to a preferred embodiment of the present invention, a dielectric layer is further disposed between the electrode groups and part of the phosphors (that is, the phosphors adjacent to the first substrate), to protect each electrode in these electrode groups from ion Damaged by impact.

According to a preferred embodiment of the present invention, the discharge gas injected into the sealed cavity is, for example, inert gas such as xenon gas (Xe), neon gas (Ne), argon gas (Ar) or a mixture thereof, and the anode of the electrode group The material of the cathode is, for example, metals such as silver, copper or chrome-copper-chromium alloy.

The present invention utilizes a plurality of barrier walls (barrierrib) to be arranged between two substrates, and each electrode group is respectively arranged in a closed cavity, and the plasma groups generated by each electrode group can be separated by the barrier walls. When it is desired to control whether an individual electrode group is lit or not, the plasmonic cluster will not dissociate to the non-luminous area and cause interference (cross-talk), and then the coating area of the phosphor can be increased by the barrier wall, Therefore, the luminous efficiency and uniformity of the cold cathode flat lamp can be improved.

With the above technical solution, the cold cathode flat lamp of the present invention has at least the following advantages:

1. Through the configuration of the barrier wall, the plasma clusters generated by each electrode group can be separated, so that when it is desired to control whether individual electrode groups are lit or not, the plasma clusters will not dissociate to the non-luminous area and become The phenomenon of interference can further improve the luminous efficiency and uniformity of the cold cathode flat lamp.

2. In addition to separating the plasma clusters produced by each electrode group with the barrier wall, the present invention also has the function of supporting at the same time, which can strengthen the structural strength of the central area of the cold cathode flat lamp, and can It replaces the configuration of spacers and edge strips in existing known products.

To sum up, the cold cathode planar lamp with special structure of the present invention is mainly composed of a first substrate, a plurality of electrode groups, a second substrate, a plurality of barrier walls, a phosphor and a discharge gas. The electrode group is arranged on the first substrate, and the second substrate is arranged above the first plate-shaped substrate. The barrier wall is disposed between the first substrate and the second substrate to form a plurality of closed cavities, and each electrode group is respectively located in the closed cavities. Phosphors are disposed on the inner walls of the closed cavities, and discharge gas is disposed in the closed cavities. Through the configuration of the barrier walls, the plasma clusters generated by each electrode group can be separated and mutual interference can be avoided; through the configuration of multiple barrier walls, the plasma clusters generated by each electrode group can be separated. They are partitioned so that they will not interfere with each other during discharge, and the coating area of the phosphor can be increased by the partition walls to improve the luminous efficiency and uniformity of the cold cathode flat lamp. It has the above-mentioned many advantages and practical value, and no similar structural design has been published or used in similar products, and it has greatly improved both in structure and function, and has made great progress in technology, and has produced good products. It is practical and practical, but indeed has enhanced efficacy, so it is more suitable for practical use, and has industrial utilization value. It is a novel, progressive and practical new design.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is a structural schematic diagram of a known cold cathode flat lamp.

Fig. 2 is a schematic structural diagram of a cold-cathode planar lamp according to a preferred embodiment of the present invention.

3A-3B are schematic diagrams of the arrangement of electrodes according to a preferred embodiment of the present invention.

4A-4B are schematic structural views of a barrier wall according to another preferred embodiment of the present invention.

100: cold cathode flat lamp 110: first substrate

120: Second base material 130: Edge strip

140: electrode group 140a: anode

140b: Cathode 150: Phosphor

160: discharge gas 170: closed cavity

180: dielectric layer 200: cold cathode flat lamp

210: First substrate 220: Electrode group

220a: Anode 220b: Cathode

230: Second substrate 240: Barrier layer

250: Phosphor 260: Discharge gas

270: Closed cavity 280: Dielectric layer

Detailed ways

The specific implementation, structure, features and efficacy of the cold cathode flat lamp according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Please refer to FIG. 2 , which is a schematic structural diagram of a cold cathode flat lamp according to a preferred embodiment of the present invention. The cold cathode flat lamp 200 of the preferred embodiment of the present invention is mainly composed of a first substrate 210, a plurality of electrode groups 220 (three groups are shown in this figure), a second substrate 230, and a plurality of barrier walls 240 , a phosphor 250 and a discharge gas 260 . in:

The electrode group 220 is disposed on the first substrate 210, and the electrode group 220 is composed of an anode 220a and a cathode 220b, and these electrodes are strip electrodes parallel to each other, and the material of these electrodes is, for example, silver , copper or chromium-copper-chromium alloy and other metals.

The second base material 230, also referring to FIG. 2, is disposed above the first plate base material 210, and the first plate base material 210 and the second base material 230 are, for example, transparent plate base materials. .

The barrier wall 240 is arranged between the first substrate 210 and the second substrate 230. Through the barrier of the barrier wall 240, a plurality of closed cavities 270 are formed between the first substrate 210 and the second substrate 230, and the above-mentioned The electrode groups 220 respectively correspond to these closed cavities 270 .

The phosphor 250 is disposed on the inner walls of the sealed cavities 270 , such as the surfaces of the first substrate 210 and the second substrate 120 , and the discharge gas 260 is injected into the sealed cavities 270 .

In addition, a dielectric layer 280 can be further arranged between the electrode group 220 and part of the phosphor 150 (ie, the phosphor adjacent to the first substrate 210), so as to protect each electrode in these electrode groups 220 from being caused by ions. Damaged by impact.

In addition, the material of the barrier wall 240 may also be a dielectric material, so as to prevent the barrier wall 240 from being penetrated by ion impact.

During the lighting process of the cold cathode flat lamp 200, a high voltage difference is applied between the two electrodes of the electrode group 220 to excite the discharge gas 260 between the cathode and the anode in the sealed cavity 270 into a high-energy state. Plasma gas formed by gas excimer molecules, ions and electrons. Afterwards, the excited atoms in the plasma release energy by emitting ultraviolet rays, and the emitted ultraviolet rays further excite the phosphor 250 on the inner wall of the sealed cavity 270 to generate visible light. It is worth noting that since each electrode group 220 is separated from each other by the barrier wall 240, the plasmons generated by each electrode group 220 can be separated by the barrier wall 240 to emit light in their respective light-emitting regions. In this way, there will be no situation where the plasma clusters migrate to the non-luminous area and cause mutual interference, so the luminous efficiency and uniformity of the cold cathode flat lamp 200 can be further improved.

Please refer to FIG. 3A-FIG. 3B , which are schematic diagrams showing the arrangement of electrodes according to a preferred embodiment of the present invention. First, please refer to FIG. 3A , the above electrode groups 220 are, for example, arranged on the first substrate 210 in the order of anode 220a, cathode 220b, anode 220a, and cathode 220b, and the arrangement is different. The electrodes are disposed on both sides of the barrier wall 240 . Next, please refer to FIG. 3B, the above-mentioned electrode groups 220 can also be arranged on the first substrate 210 in the order of the anode 220a, the cathode 220b, the cathode 220b, and the anode 220a. The electrodes are disposed on both sides of the barrier wall 240 .

It is worth noting that when the voltages of the electrodes on both sides of the barrier wall 240 are in the same direction (as shown in FIG. The electrodes on both sides of the wall 240 (that is, the dielectric) are arranged closer to the barrier wall 240, thereby increasing the discharge space.

In addition, any of the same electrodes in each of the above electrode groups 220 can be connected in series (not shown in the figure) to provide the same voltage. For example, the anodes 220a in each electrode group 220 can be connected in series, and of course, the cathodes 220b in each electrode group 220 can also be connected in series. In addition, the lead ends of the wires of the electrodes (ie, the anode 220a and the cathode 220b) in each electrode group 220 can be located on the same side (not shown in the figure), so that the driving circuit does not need to be connected to both ends of the flat lamp.

Please refer to FIG. 4A-FIG. 4B , which are structural schematic diagrams of barrier ribs according to another preferred embodiment of the present invention. The width of the portion of the barrier wall 240 in contact with the first substrate 210 is greater than the width of the portion of the barrier wall 240 in contact with the second substrate 230, and is designed with a narrow top and a wide bottom. The shape of the second substrate 230 is, for example, a triangle (as shown in FIG. 4A ) or a trapezoid (as shown in FIG. 4B ). By reducing the light output barrier of the second substrate 230 , better light uniformity can be obtained.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solution of the present invention.

Claims (15)

1. A cold cathode flat lamp, characterized in that it comprises: a first substrate; a plurality of electrode groups, the electrode groups are disposed on the first substrate, and each of the electrode groups has an anode and a cathode; a second substrate, configured above the first plate-shaped substrate; A plurality of barrier walls are arranged between the first substrate and the second substrate, and a plurality of closed cavities are formed between the first substrate and the second substrate by the barrier walls, wherein the electrode groups are respectively corresponding to these closed cavities; a fluorescent body arranged on the inner wall of the closed cavities; and A discharge gas is arranged in the sealed cavities. 2. The cold-cathode flat lamp according to claim 1, wherein the barrier walls are strip-shaped, and the width of each of the barrier walls in contact with the first substrate is larger than that of each of the barrier walls. The width of the portion where the barrier ribs are in contact with the second substrate. 3. The cold-cathode planar lamp according to claim 2, wherein each of said barrier walls has a triangular cross-section. 4. The cold-cathode planar lamp according to claim 2, wherein the section of each of said barrier walls is trapezoidal. 5. The cold-cathode planar lamp according to claim 1, wherein the material of the barrier walls is a dielectric material. 6. The cold cathode flat lamp according to claim 1, wherein the anodes of the electrode groups are connected in series. 7. The cold cathode flat lamp according to claim 6, wherein the cathodes of the electrode groups are connected in series. 8. The cold cathode flat lamp according to claim 1, wherein the cathodes of the electrode groups are connected in series. 9. The cold-cathode flat lamp according to claim 1, wherein the electrode groups are arranged on the first substrate in sequence of anode, cathode, anode, and cathode. 10. The cold-cathode flat lamp according to claim 1, wherein the electrode groups are arranged on the first substrate in sequence of anode, cathode, cathode, and anode. 11. The cold cathode flat lamp according to claim 1, further comprising a dielectric layer disposed between the electrode groups and part of the phosphor. 12. The cold cathode flat lamp according to claim 1, wherein said discharge gas is an inert gas. 13. The cold cathode flat lamp according to claim 12, wherein said inert gas includes xenon gas, neon gas, argon gas and combinations thereof. 14. The cold-cathode planar lamp according to claim 1, wherein said electrode groups are made of metal. 15. The cold-cathode planar lamp according to claim 14, wherein said metal material comprises one of silver, copper and chrome-copper-chrome alloy.

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