KR100437954B1 - Flat type fluorescent lamp and lamp assembly applying the same - Google Patents

Abstract

Disclosed are a flat lamp and a lamp assembly employing the same. The present invention provides a front substrate, a rear substrate to which a part of a surface facing the front substrate is joined, a plurality of partition walls installed on the rear substrate bonded to the front substrate and adhered to the front substrate to partition a discharge space; A phosphor layer applied in the discharge space, a plurality of electrodes disposed on opposite sides of at least one of the front and back substrates, and a plurality of floating electrodes disposed between the electrodes to generate a discharge due to voltage induced phenomenon of the electrodes. And a flat lamp having a flat lamp and an insulating means mounted therein, the frame having an upper portion thereof, and a light diffusing means disposed on the upper portion of the frame to be spaced apart from the flat lamp. By disposing the floating electrode in the discharge space of the substrate to be bonded, the discharge start voltage can be lowered and at the same time, the discharge efficiency can be improved.

Description

Flat type lamp and lamp assembly employing the same {Flat type fluorescent lamp and lamp assembly applying the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat lamp, and more particularly, to a flat lamp having an increased amount of light by installing a floating electrode on a substrate, and a lamp assembly employing the same.

In general, flat display devices are classified into light emitting type and light receiving type. The light emitting type includes a flat cathode ray tube, a plasma display panel, a fluorescent fluorescent display, and the like, and a light receiving type includes a liquid crystal display.

Among them, the liquid crystal display itself does not emit light to form an image, and since it is a light receiving type display device in which light is incident from outside to form an image, there is a disadvantage in that an image cannot be observed in a dark place. In order to solve this problem, a back light unit is installed on the back of the liquid crystal display to irradiate light. As a result, the image can be observed even in a dark place. The backlight unit is used in a surface light source device such as an illumination signboard in addition to a light receiving display device such as a liquid crystal display.

The backlight unit guides and diffuses light emitted from a light source such as a cold cathode fluorescent lamp (CCFL) to a light guide plate, and a flat fluorescent lamp that diffuses light by exciting the phosphor by ultraviolet rays. lamp) method is used.

1 illustrates a flat lamp 10 according to a conventional example.

Referring to the drawings, the flat lamp 10 is interposed between the front substrate 11, the back substrate 12 coupled to the front substrate 11, and the front and rear substrates 11, 12. Sealant 13 to be sealed, and discharge gas injected into the sealed space.

The lower surface of the front substrate 11 is coated with a phosphor layer 14 for emitting visible light by ultraviolet rays generated by the discharge gas during discharge, and the upper surface of the back substrate 12, the electrode ( 15) is arranged. The electrode 15 is embedded by the dielectric layer 16. In addition, a plurality of spacers 17 are distributed between the front and rear substrates 11 and 12 to maintain a uniform discharge space.

In the flat lamp 10 having the structure as described above, as power is applied to the electrode 15, the phosphor layer 14 is excited by ultraviolet rays generated by surface discharge between the electrodes 15 to emit light.

However, since the conventional flat lamp 10 mainly uses an inert gas such as xenon (Xe) or neon (Ne) as the discharge gas, the AC type voltage applied to the electrode 15 is not only high as about 2 kV. The luminous efficiency is low around 30 lm / W. In addition, although mercury having a relatively high efficiency can be employed, the lamp 10 is difficult to evaporate mercury at a low temperature because the current flowing through each discharge space during the discharge is low.

2 shows a conventional flat lamp 20 employing mercury.

Referring to the drawings, in the flat lamp 20, the partition wall 22 is disposed on the substrate 21, and the phosphor layer 23 is coated between the partition walls 22. The partition wall 22 is formed in a sand shape to form a long discharge space. The electrode 24 is disposed at the start point and the end point of the discharge space, and the sealant 25 is formed along the edge. In addition, a metal plate 26 impregnated with mercury is installed in the discharge space.

In the flat lamp 20 having the structure as described above, since a larger current flows in the discharge space than in the case of FIG. 1, the mercury can be easily evaporated from the metal plate 26, thereby achieving high efficiency mercury discharge. .

However, as the length of the discharge space becomes several times to several tens of times longer, the discharge start demand voltage is further required at the same ratio, thereby causing a problem due to excessive voltage. If the discharge demand voltage is excessive, it causes the stability of the lamp, leakage of current, and electromagnetic wave problem.

In addition, recently, the flat panel lamp 20 is also enlarged due to the increase in size of the liquid crystal display device. As a result, the meandering discharge length becomes exponentially longer, and the discharge demand voltage is further increased. When applied to a liquid crystal display device of 20 to 30 inches, since a high voltage of several tens of kilovolts is required, discharge implementation itself is practically impossible. As a result, structural problems such as dividing the discharge space into several channels and disposing the electrodes, respectively, occur.

3 shows a conventional flat lamp 30 which shortens a relatively long discharge distance.

Referring to the drawings, the flat lamp 30 has a front substrate 31, a rear substrate 32 coupled to the front substrate 31, and edges of the front and rear substrates 31 and 32. It includes a sealant 33 formed along.

Both sides of the front substrate 31 are symmetrically disposed with the first and second electrodes 34 and 35, and are spaced apart from each other by a predetermined interval. The partition 36 is formed, and a phosphor layer 37 is coated in the discharge space between the partition 36. The partition 36 is disposed to face one side of the discharge space, and an opening 38, which is a predetermined space, exists between the inner wall of the sealant 33 facing the end of the partition 36. In the discharge space partitioned by the partition 36, a plurality of metal plates 39 impregnated with mercury are disposed.

In the flat lamp 30 having the above structure, as the discharge space is not a dead space as in FIG. 2, the discharge distance is shortened, so that the high voltage is easily solved. However, through the openings 38 formed for exhaust and discharge gas injection, each discharge channel does not generate an independent discharge and a strong discharge occurs in a specific channel, or a phenomenon in which the discharge plasma is severely shaken occurs. Liver crosstalk occurs.

The reason for this is that the movement of discharge charges through the inner surface of the opening 38 in which the electrodes 34 and 35 are located is not restricted and can be easily moved, so that the discharge charges are concentrated in a discharge channel where discharge occurs relatively easily. Because it occurs. This crosstalk is made over the discharge channels connected by the openings 38.

In order to solve the instability of the discharge caused by the above-described structural problem, a relatively strong voltage is generated, the problem caused by the voltage rises again.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a flat lamp having a floating electrode and a lamp assembly employing the same, so that the discharge start voltage can be lowered and the discharge efficiency can be improved.

Another object of the present invention is to adopt a high-efficiency discharge gas containing mercury, it is possible to improve the uniformity of the brightness when applied, and to achieve a stable discharge at a low voltage without completely isolated each discharge channel A lamp and a lamp assembly employing the same are provided.

1 is a cross-sectional view of a flat lamp according to a conventional example,

2 is a plan view of a flat lamp according to another conventional example,

3 is a plan view of a flat lamp according to another conventional example,

4 is a plan view of a flat lamp according to a first embodiment of the present invention;

5 is an exploded perspective view of a flat lamp according to a second embodiment of the present invention;

6 is a plan view of FIG. 5;

7 is a plan view of a flat lamp according to a third embodiment of the present invention;

8 is a plan view of a flat lamp according to a fourth embodiment of the present invention;

9 is a front view of a flat lamp according to a fifth embodiment of the present invention;

10 is a front view of a flat lamp according to a sixth embodiment of the present invention;

11 is a layout view showing the position of the electrode according to an embodiment of the present invention;

12 is a cross-sectional view of a flat lamp according to a seventh embodiment of the present invention;

13 is a cross-sectional view of a flat lamp according to an eighth embodiment of the present invention;

14 is a cross-sectional view of a flat lamp according to a ninth embodiment of the present invention;

Fig. 15 is a sectional view of a flat lamp according to a tenth embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

50 ... flat lamp 51 ... front board

52 Back panel 53 Sealant

54 ... first electrode 55 ... second electrode

56 ... Bulk 56a ... First bulkhead

56b ... 2nd bulkhead 57 ... phosphor layer

58 ... first auxiliary electrode 59 ... second auxiliary electrode

59 dielectric layer 500 floating electrode

510 ... opening 520 ... metal plate impregnated with mercury

Flat lamp according to an aspect of the present invention for achieving the above object,

Front substrate;

A plurality of partition walls installed on the rear substrate bonded to the front substrate at predetermined intervals and closely contacted on the front substrate to partition the discharge space;

A phosphor layer applied in the discharge space;

A plurality of electrodes provided on opposite sides of at least one of the front and rear substrates; And

And a plurality of floating electrodes disposed between the electrodes to generate a discharge by the voltage induction phenomenon of the electrodes.

In addition, the partition wall extends from the opposite side of the discharge space to the opposite side, respectively, the strip-shaped first partition wall, and the strip-shaped second partition wall arranged alternately with the first partition wall to form a continuous discharge space Characterized in that it comprises a.

In addition, the electrode is characterized in that disposed in the direction orthogonal to the partition wall on the inner surface of the back substrate.

In addition, the floating electrode is characterized in that a plurality of intermittently disposed in the discharge space between the electrodes in the direction parallel to the partition wall.

Furthermore, the electrode and the floating electrode are both embedded by a dielectric layer.

Flat lamp assembly according to another aspect of the present invention,

A front substrate, a rear substrate on which a part of an edge or an edge thereof facing the front substrate is joined, a plurality of partition walls provided on the rear substrate bonded to the front substrate and adhered to the front substrate to partition a discharge space; And a plurality of electrodes disposed on opposite sides of at least one of the front and rear substrates, the phosphor layer applied in the discharge space, and disposed between the electrodes to generate a discharge due to voltage induced phenomenon of the electrodes. A flat lamp having a plurality of floating electrodes;

A frame having the flat lamp and the insulating means mounted therein and having an upper opening; And light diffusing means disposed above the frame and spaced apart from the flat lamp.

In addition, the floating electrode is not connected to the electrode, it is characterized in that it is disposed independently in the discharge space without supply of external power.

In addition, the floating electrode is arranged to be spaced apart a predetermined interval in the direction orthogonal to the partition wall, characterized in that connected over the entire discharge space.

Further, the electrode and the floating electrode are both formed on the inner surface of the back substrate, characterized in that the dielectric layer is embedded in the upper portion.

Further, the electrode and the floating electrode is characterized in that formed on the outer surface of the back substrate.

Hereinafter, a preferred embodiment of a flat lamp and a lamp assembly employing the same according to the present invention will be described in detail with reference to the accompanying drawings.

4 shows a flat lamp 40 according to a first embodiment of the present invention.

Referring to the drawings, the flat lamp 40 includes a front substrate 41 and a rear substrate 42 installed to face the front substrate 41.

A partition wall 46 is formed on the top surface of the rear substrate 42 to be spaced apart by a predetermined interval. The partition wall 46 is a strip-shaped first partition wall 46a extending from one side of the rear substrate 42 to the other side, and a strip-shaped second strip extending from the other side of the rear substrate 42 to one side. The partition wall 46b is included. In this manner, the first and second partition walls 46a and 46b are alternately arranged.

The sealant 43 may be formed at the outermost side of the partition 46 along the edges of the front and rear substrates 41 and 42 to vacuum-close them. In some cases, the sealant 43 may be additionally applied to upper surfaces of the first and second partition walls 46a and 46b in order to enhance the sealing property with the front substrate 41.

The phosphor layer 47 is coated in the discharge space between the first and second partition walls 46a and 46b. In the discharge space in which the phosphor layer 47 is formed, a metal plate 49 impregnated with mercury is provided. In addition, a separate fixing means for fixing the mercury-impregnated metal plate 49 may be installed at one side of the discharge space so as to uniformly control the amount of mercury in each discharge channel in order to improve the luminance characteristic of the initial discharge. There will be.

On the outer surfaces of the sealed front and rear substrates 41 and 42, strip-shaped first and second electrodes 44 and 45 are disposed in a direction orthogonal to the partition wall 46. The first and second electrodes 44 and 45 are positioned opposite to both sides of the substrate 41.

The flat lamp 40 configured as described above secures a uniform discharge space over the entire surface in parallel by the first and second partition walls 46a and 46b, and the front and rear substrates 41 and 42 The sealed space is provided by the sealant 43 formed along the edge.

In addition, a plurality of electrodes 44 and 45 are positioned on the substrate 41 corresponding to both ends of the discharge space, and the electrodes 44 and 45 cover a predetermined area of each discharge channel. Accordingly, the first and second electrodes 44 and 45 share only two adjacent discharge channels.

In this method, only the two discharge spaces adjacent to the cross-talk phenomenon in which the entire discharge current is concentrated to a specific channel where the discharge is easily generated when the entire discharge channels are shared by the electrodes 44 and 45 are formed. 45) can be minimized because they are shared.

FIG. 5 illustrates a flat lamp 50 according to a second embodiment of the present invention, and FIG. 6 illustrates a structure in which electrodes and partition walls of FIG. 5 are disposed.

Referring to the drawings, the flat lamp 50 includes a front substrate 51 and a rear substrate 52 which is installed to face the front substrate 51.

The front substrate 51 is made of a transparent material having excellent light transmittance, and in some cases, the front phosphor layer 570 may be coated on the inner surface thereof. The front phosphor layer 570 applied to the front substrate 51 is relatively thinner than the back phosphor layer 57 applied to the back substrate 52 which will be described later.

Thus, the front phosphor layer 570 is a visible light generated by the ultraviolet light generated from the mercury existing in the discharge space of the sealed front and back substrate 51, 52 excite the phosphor layer of the front substrate 51 Since it should be transmitted, it is preferable to apply a thin layer of about 25 micrometers or less in consideration of the luminous efficiency of the front phosphor layer 570 and the transmission efficiency of the front substrate 51.

The first front electrode 58 and the second front electrode 59 are disposed on the outer surface of the front substrate 51. The first and second front electrodes 58 and 59 have a strip shape and are positioned opposite to both sides of the front substrate 51.

The first rear electrode 54 and the second rear electrode 55 are disposed on the upper surface of the lower substrate 52 in a direction parallel to the first and second front electrodes 58 and 59. The first and second back electrodes 54 and 55 are formed at positions corresponding to the first and second front electrodes 58 and 59, and are formed along both edges of the lower substrate 52. have.

Substantially, the first front and back electrodes 58 and 54 are energized, and the second front and back electrodes 59 and 55 are also electrically connected. In addition, the first and second front electrodes 58 and 59 formed on the front substrate 51 may be formed on the outer surface of the back substrate 52, and may be excluded in some cases.

A plurality of floating electrodes 500 are intermittently disposed between the first and second back electrodes 54 and 55. The floating electrode 500 is positioned at a predetermined interval at a point corresponding to the discharge space. The floating electrode 500 is not electrically connected to the first and second back electrodes 54 and 55 and is disposed independently, and the voltage is applied by the power applied to the back electrodes 54 and 55. Discharge is generated by the induction phenomenon.

Dielectric layers 59 are coated on the first and second back electrodes 54 and 55 and on the floating electrodes 500 to protect them. The dielectric layer 59 may be selectively applied to the first and second back electrodes 54 and 55 and the floating electrode 500, but it may be advantageous to apply the entire surface to the manufacturing process.

A sealant 53 having a predetermined height may be formed on the rear substrate 52 to which the dielectric layer 59 is applied to seal the front and rear substrates 51 and 52 along the edge of the substrate 52.

The partition wall 56 is provided inside the sealant 53 to be spaced a predetermined distance apart. The partition wall 56 is formed in a direction orthogonal to the first and second back electrodes 54 and 55. The partition wall 56 is formed in a strip shape, and may be formed by additionally installing a dielectric material or sanding or etching the back substrate 52 itself. Moreover, since the width | variety of the upper end of the said partition 56 is a cause of a dark part, it is manufactured so that it may be at most 2 mm or less.

The partition wall 56 may include a first partition wall extending from the portion where the first rear electrode 54 is installed to the second rear electrode 55 to extend from the mutually opposing side surfaces of the discharge space to the opposing sides. 56a and a second partition 56b extending from the portion where the second back electrode 55 is provided to the first back electrode 54.

In this case, the first partition wall 56a is alternately disposed with the second partition wall 56b, and ends of the first and second partition walls 56a and 56b are joined to the inner wall of the sealant 53. Thus, it is positioned in the direction orthogonal to the back electrodes 54 and 55. An opening 510 is formed between the other ends of the first and second barrier ribs 56a and 56b and an inner wall of the sealant 53 opposite thereto to provide a passage for smoothly injecting exhaust gas and discharge gas. have. The opening 510 is provided to be located in the opposite direction for each of the first and second partition walls 56a and 56b.

Accordingly, the discharge space partitioned by the partition wall 56 forms a continuous sand-shaped passage, and each discharge space is isolated from each other except for a portion where the opening 510 is formed in order to generate a stable discharge.

The sealant may be additionally applied to the top surfaces of the first and second partition walls 56a and 56b to enhance the sealing property. When the sealant is applied to the top surfaces of the first and second barrier ribs 56a and 56b, the barrier rib 56 serves as a spacer, and the space charge in the discharge space is turned on even when the barrier rib 56 is turned on. It is possible to isolate each discharge channel by suppressing the movement to another adjacent discharge space across the top of the c). Thereby, it is possible to ensure the discharge safety characteristic at the time of lighting.

A back phosphor layer 57 is coated in the discharge space partitioned by the first and second partition walls 56a and 56b. The rear phosphor layer 57 extends from an upper surface of the dielectric layer 59 to inner walls of the first and second partition walls 56a and 56b.

The back phosphor layer 57 uniformly coats red, green, and blue phosphor raw materials that are excited by 254 nanometer ultraviolet rays generated from mercury during discharge. In this case, a material having a high reflectance may be preferentially applied to a lower portion of the rear phosphor layer 57 in order to increase the reflectance of visible light. The back phosphor layer 57 has a thickness that is several times greater than that of the front phosphor layer 570 that may be applied to the inner surface of the front substrate 51.

Meanwhile, a metal plate 520 impregnated with mercury is positioned in the discharge space partitioned by the partition wall 56. The mercury-impregnated metal plate 520 can be easily separated from the mercury by the high frequency induction heating method after exhaust and discharge gas injection and encapsulation are completed. Alternatively, liquid mercury may be injected during exhaust. The discharge space also contains rare gases such as argon (Ar), neon (Ne), or xenon (Xe).

The operation of the flat lamp 50 having the structure as described above is as follows.

First, an AC or pulse waveform voltage is applied between the first and second back electrodes 54 and 55. When a voltage is applied in this way, an electric field discharge is generated by the first and second back electrodes 54.

The electrons generated during the discharge collide with mercury gas in the discharge space divided by the first and second partition walls 56a and 56b, that is, in each discharge channel to generate ultraviolet rays. The ultraviolet rays generated during the discharge excite the phosphor layers 57 applied to the respective discharge spaces and convert them into visible light.

In the operation as described above, since the metal plate 520 impregnated with mercury is installed in the discharge space partitioned by the partition wall 56, the mercury partial pressure is continuously supplied by supplying a uniform amount of mercury to each discharge space. It can be made uniform in the discharge space.

In this case, since an independent type floating electrode 500 is intermittently interposed in the discharge space, a voltage is induced by a power applied to the electrodes 54 and 55 to generate a discharge. As a result, the first and second back electrodes 54 and 55 provided on both sides of the lamp 50 are left intact, and discharge can be started at a relatively low voltage, thereby achieving more stable discharge.

7 shows a flat lamp 70 according to a third embodiment of the present invention.

Referring to the drawings, the flat lamp 70 is provided with a substrate 72, and the first and second electrodes 74 and 75 are disposed in a strip shape so as to face opposite sides of the substrate 72. have.

The partition walls 76 are disposed at predetermined intervals inside the first and second electrodes 74 and 75, and the partition walls 76 may extend from opposite sides of the discharge space to opposite sides. The first partition 76a extending from the first electrode 74 to the second electrode 75, and the second partition 76b extending from the second electrode 75 to the first electrode 74. This is formed alternately.

In the discharge space partitioned by the partition wall 76, a plurality of floating electrodes 700 intermittently arranged to generate a discharge due to voltage induction are not electrically connected to an external power source. The floating electrode 700 has a discontinuous band shape, a polygon to be described later, or any other shape selected from a circle, a polygon, or a mesh shape.

In the discharge space in which the floating electrode 700 is disposed, a phosphor layer 77 excited by ultraviolet rays generated during discharge is coated.

Here, the comb teeth 79 protrude from the inner walls of the first and second electrodes 74 and 75 in a direction parallel to the direction in which the partition 76 is formed. The comb teeth 79 enter a predetermined length into the discharge space partitioned by the first and second partition walls 76a and 76b. As a result, since the first and second electrodes 74 and 75 which share only two adjacent discharge channels may be separated, the probability of crosstalk is further lowered.

8 shows a flat lamp 80 according to a fourth embodiment of the present invention.

Referring to the drawings, the first and second electrodes 84 and 85 are disposed on the substrate 82 so as to face each other, and the partition walls including the first and second partition walls 86a and 86b are alternately disposed therebetween. 86 is provided, and a phosphor layer 87 is applied to the discharge space partitioned by the partition wall 86.

In this case, the floating electrode 800 disposed in the discharge space has a polygonal shape connected to the entire channel instead of being disposed independently of each discharge channel. That is, the floating electrodes 800 are disposed to be spaced apart by a predetermined interval in the direction parallel to the first and second electrodes 84 and 85. The floating electrode 800 is formed intermittently and is not disposed only in a specific discharge space, but is located in the entire discharge space in one strip form. As the floating electrode 80 is disposed in this way, it is possible to minimize the deviation of the electrode area or electrode position between each discharge channel.

9 illustrates a lamp assembly employing a flat lamp 90 according to a fifth embodiment of the present invention.

Referring to the drawings, the flat lamp assembly, the flat lamp 90, the lamp 90 and the insulating means is mounted therein and the frame 910, the upper portion of the open, and the flat lamp 90 is opposed to And light diffusing means 940 for diffusing the light irradiated therefrom.

The flat lamp 90 includes a front substrate 91 and a rear substrate 92 coupled thereto, and sealants 93 along opposite edges of the front and rear substrates 91 and 92. Is applied to seal them.

The above-described barrier ribs 96 are alternately arranged on the upper surface of the rear substrate 92, and the phosphor layer 97 is applied to the discharge space formed between the barrier ribs 96. In the discharge space, mercury or a metal impregnated with mercury may be installed to continuously supply mercury to the discharge space injected into the discharge space.

On the outer surface of the rear substrate 92, strip-shaped first and second electrodes 94 and 95 are disposed on opposite sides. In addition, a plurality of floating electrodes 900 are intermittently formed at portions corresponding to the discharge spaces on the outer surface of the rear substrate 92.

At this time, when the electrodes 94, 95 and 900 are disposed on the outer surfaces of the front and rear substrates 91 and 92 to be joined, the insulator layer 99 covers them to insulate and protect them from the outside. .

The light diffusing means 940 diffuses the light generated by the excitation of the phosphor layer 97 from the flat lamp 90 and prevents the non-light emitting region from being displayed on the partition 96. The transparent substrate 920 is installed on the opening side of the 910 to correspond to the lamp 90 and the diffusion sheet 930 is provided on the upper surface of the substrate 920. Alternatively, a diffusion plate may be used instead of the transparent substrate 920 and the diffusion sheet 930 to make the dark portion invisible.

In the flat lamp assembly, not only the flat lamp 90 having the above-described structure but also an electrode may be installed inside the substrate, may be disposed to extend from the outside, and the floating electrode may be directly formed in the discharge space. Could be When such an electrode is disposed in a substrate, it is embedded by a dielectric layer. In addition, the partition wall partitioning the discharge space may be arranged alternately, the discharge space can form a continuous space of one from the start point to the end point.

10 shows a flat lamp 100 according to a sixth embodiment of the present invention.

Referring to the drawing, the first electrode 140 and the second electrode 150 are disposed on both sides of the substrate 120 so as to face each other. In addition, the floating electrode 1000 is intermittently disposed in the discharge space.

In this case, as the LCD becomes larger, at least one electrode 140 is divided into the number of inverters 141 and 142 so that two or more inverters can be used to overcome the limitation of inverter power due to the increase in power. )

When the first electrode 140 is divided by the number of inverters to form the electrodes 141 and 142, the second electrode 150, which is the counter electrode on the other side, is formed as one electrode without being divided, and the electrical It will be effective to ground it.

FIG. 11 is an enlarged view of a shape of an electrode and a partition in which a flat lamp is assembled according to an embodiment of the present invention.

Referring to the drawing, a sealant 1130 is coated on the substrate 1110 along an edge surface of the substrate 1110, and a strip-shaped electrode 1140 is disposed on one side of the substrate 1110.

The partition wall 1160 is disposed inside the sealant 1130 in a direction orthogonal to the electrode 1140. The partition wall 1160 includes a first partition wall 1161 and a second partition wall 1162 that are alternately arranged to be spaced apart by a predetermined interval to define a discharge space. Of course, the phosphor layer is applied to the discharge space partitioned by the partition 1160.

The strip-shaped floating electrode 1180 is disposed in the discharge space to generate a discharge due to voltage induction in a direction parallel to the electrode 1140.

In this case, the electrode 1140 covers a predetermined area of each discharge channel as described above, and shares only two adjacent discharge channels as indicated by arrows. This approach can reduce crosstalk in which the entire discharge current is directed to a specific channel.

12 to 15 illustrate a case where an electrode according to an embodiment of the present invention is disposed.

Referring to FIG. 12, the flat lamp 1200 is provided with front and rear substrates 1210 and 1220 sealed by the sealant 1230, and covers both sides of the substrates 1210 and 1220. The first electrode 1240 and the second electrode 1250 having a predetermined width are formed.

A partition 1260 is disposed on an inner surface of the rear substrate 1220 in a direction orthogonal to the first and second electrodes 1240 and 1250, and a phosphor layer may be disposed in a discharge space partitioned by the partition 1260. 1270) is applied. An auxiliary sealant 1290 may be further applied to the top surface of the partition 1260 to enhance sealing. Meanwhile, the floating electrode 1280 is intermittently disposed at a portion corresponding to the discharge space on the bottom surface of the back substrate 1220.

In the present embodiment, the partition wall 1260 is formed on the back substrate 1220 through a separate process.

Referring to FIG. 13, in the flat lamp 1300, the front substrate 1310 is coupled to the rear substrate 1320 by the sealant 1330. First and second electrodes 1340 and 1350 are formed on opposite outer surfaces of the combined front and rear substrates 1310 and 1320. In addition, a plurality of intermittent band-shaped floating electrodes 1380 are disposed on the bottom surface of the rear substrate 1320.

In this embodiment, the rear substrate 1320 itself is processed to form a partition wall in a direction orthogonal to the first and second electrodes 1340 and 1350. Such processing may be possible by sandblasting, etching, grinding or the like. The auxiliary sealant 1390 may be additionally applied to the top surface of the rear substrate 1320 having the partition wall integrally formed thereon.

When the back substrate 1320 is directly processed to form a partition wall, the thickness of the back substrate 1320 of the discharge space becomes thin, thereby reducing the total weight, and also from the external electrodes 1340 and 1350. By applying power, discharge can be achieved at a low applied voltage.

Referring to FIG. 14, the flat lamp 1400 includes a front and rear substrates 1410 and 1420, a sealant 1430 interposed therebetween, and a partition wall 1460 disposed on the rear substrate 1420. And a phosphor layer 1470 applied to the discharge space partitioned by the partition wall 1460. An auxiliary sealant 1490 may be further applied to an upper surface of the partition 1460.

In this embodiment, the electrode is provided in the discharge space. That is, the first and second electrodes 1440 and 1450 are disposed on the top surface of the back substrate 1420 to face each other, and the floating electrode 1480 is intermittently patterned in the discharge space separated by the partition wall 1460. It is mad. The first and second electrodes 1440 and 1450 and the floating electrode 1480 are buried by the dielectric layer 1450. The barrier rib 1460 is formed on an upper surface of the dielectric layer 1450.

Meanwhile, auxiliary electrodes 4 and 5 may be additionally formed on portions of the front substrate 1410 corresponding to the first and second electrodes 1440 and 1450.

Referring to FIG. 15, the flat lamp 1500 may include a front and rear substrate 1510 and 1520, a sealant 1530 for sealingly coupling them, a partition wall 1560 for partitioning a discharge space, and an application to a discharge space. Phosphor layer 1570 is included.

In this embodiment, the electrodes are provided on the inner surfaces of the front and rear substrates 1510 and 1520. That is, the first and second electrodes 1540 and 1550 are disposed on the top surface of the rear substrate 1520 to face both sides, and a plurality of floating electrodes 1580 are disposed in the discharge space. The first and second electrodes 1540 and 1550 and the floating electrode 1580 are filled with a dielectric layer 8.

In addition, auxiliary electrodes 6 and 7 are formed on portions of the front substrate 1510 that correspond to the first and second electrodes 1540 and 1550. The auxiliary electrodes 6 and 7 are embedded by the dielectric layer 8.

As described above, the flat lamp of the present invention and the lamp assembly employing the same may reduce the discharge start voltage and improve the discharge efficiency by disposing the floating electrode in the discharge space of the substrate to be joined.

In addition, while employing a discharge gas containing high-efficiency mercury in the discharge space, when applying this, it is possible to generate a stable discharge at a low voltage while separating each discharge channel. However, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (16)

Front substrate; A rear substrate joined to the front substrate or a part of the edge thereof to form a discharge space; A strip-shaped first partition wall disposed on the rear substrate and extending from the opposite side surfaces of the discharge space to the opposite sides, and alternately disposed with the first partition wall to form a continuous discharge space; A plurality of partition walls installed as two partition walls to partition a discharge space and having an upper portion joined to the front substrate; A phosphor layer applied in the discharge space; A plurality of electrodes disposed on opposite sides of at least one of the front and rear substrates and disposed in a direction orthogonal to the partition wall; And And a plurality of floating electrodes disposed between the electrodes to generate a discharge due to voltage induction of the electrodes . delete delete The method of claim 1 , And the floating electrodes are intermittently disposed in the discharge space between the electrodes in a direction parallel to the partition wall. delete delete The method of claim 1 , And the floating electrodes are intermittently arranged in a direction parallel to the partition wall on an outer surface of the rear substrate. The method of claim 7, wherein Flat surface lamp, characterized in that the insulator layer is further formed on the outer surface of the electrode and the floating electrode. The method of claim 1, And the floating electrode is not electrically connected to the electrode and is independently disposed in a discharge space without an external power supply. The method of claim 1, And the floating electrodes are spaced apart from each other by a predetermined interval in a direction orthogonal to the partition wall and connected over an entire discharge space. The method of claim 1, The floating electrode is a flat lamp, characterized in that formed in any one shape selected from a discontinuous band, circular, polygonal or mesh shape. A front substrate, a rear substrate on which an edge or part of an edge facing the front substrate is joined, a strip-shaped first partition wall disposed on the rear substrate and extending from an opposite side of the discharge space to an opposite side; And a plurality of partition walls arranged alternately with the first partition wall to form a continuous discharge space to form a continuous discharge space, thereby partitioning the discharge space and having an upper portion joined to the front substrate. A plurality of electrodes disposed on opposite sides of the phosphor layer and at least one of the front and rear substrates, and arranged in a direction orthogonal to the partition wall, and disposed between the electrodes to be discharged by a voltage induced phenomenon of the electrodes. A flat lamp having a plurality of floating electrodes for generating a; A frame having the flat lamp and the insulating means mounted therein and having an upper opening; And light diffusing means disposed on the upper portion of the frame to be spaced apart from the flat lamp. The method of claim 12, The floating electrode is not connected to the electrode, the flat lamp assembly, characterized in that disposed separately in the discharge space without the supply of external power. The method of claim 12, And the floating electrodes are spaced apart from each other by a predetermined interval in a direction orthogonal to the partition wall, and are connected over an entire discharge space. The method of claim 12, And the electrode and the floating electrode are formed on the inner surface of the rear substrate, and a dielectric layer is buried thereon. The method of claim 12, The electrode and the floating electrode is a flat lamp assembly, characterized in that formed on the outer surface of the back substrate.