KR100820185B1 - Surface emitting device with side slit - Google Patents

Abstract

A surface emitting device is provided to shorten the time required for vacuum, exhaust and diffusion of mercury by forming a slit on one end of each discharge channel, thereby improving light emission efficiency of the device. A lamp body for generating and emitting light has plural discharge channels(31) divided into plural discharge spaces. An electrode(30) applies a discharge voltage to the lamp body, and an exhaust line(60) is formed on a flange(40) of the lamp body. The discharge channel and the exhaust line communicate with each other by a slit(50). The lamp body has an upper board and a lower board spaced apart from the upper board, and the space between the upper and lower boards is defined by plural discharge space partitions to form the discharge channel.

Description

Surface Emitting Device With Side Slit}

1A and 1B are plan views of a surface light emitting device according to the related art, respectively.

2 is an exploded perspective view of the surface light emitting device according to the present invention.

3 is a plan view of a surface light emitting device according to the present invention.

4 is a plan view according to another embodiment of the present invention.

5 is a plan view according to another embodiment of the present invention.

6 is a cutaway perspective view of another embodiment of the lamp body of the present invention.

** Description of the symbols for the main parts of the drawings **

1: surface emitting device 10: upper substrate

20: lower substrate 30: electrode

40: lamp body rim 50: through hole

60: exhaust line 70: inner bulkhead

80: second through groove

The present invention relates to a surface light emitting device, and more particularly, a through groove is formed on a border of the electrode portion outside the electrode to shorten the time of vacuum, exhaust and mercury diffusion time, and to prevent pinky discharge due to leakage of mercury. The present invention relates to a surface light source lamp which fundamentally removes and improves luminous efficiency of the surface light emitting device.

LCD is a non-emission type electronic display device and requires a light source having extra outstanding characteristics in order to realize a clear and natural natural color of a moving image.

In particular, a composite of an integral part including a light source itself to irradiate light from the back of the liquid crystal module and a power circuit for driving the light source and a uniform plane light is called a backlight unit (BLU). LCD backlight was used as light source by making Cold Cathode Fluorescent Lamp (CCFL) into customs form. In applying CCFL as a backlight for LCD, a direct light type in which a plurality of cold cathode fluorescent lamps are mounted under the liquid crystal panel and a diffusion plate is installed between the cold cathode fluorescent lamp and the liquid crystal panel, and the side of the liquid crystal panel An edge light method is mainly used in which a cold cathode fluorescent lamp is mounted on the light source and the light emitted from the cold cathode fluorescent lamp is distributed to the entire LCD screen using a transparent light guide panel.

However, the above methods have low light utilization efficiency due to light loss, complicated overall structure, high production cost, and limited uniformity of luminance. The use of flat backlight (Flat Backlight) in the form of a surface discharge type or counter discharge type plasma lamp is increasing.

To make a flat lamp, the flat glass plate is heated by using a mold designed to be processed to have a plurality of discharge spaces separated by a partition wall and connected to the discharge passage by heating the flat glass plate to a constant temperature capable of forming. Forming a discharge space in the flat glass plate, taking out the molded glass plate having the discharge space from the mold and cooling it slowly, coating and firing the phosphor inside the discharge space of the molded glass plate, and forming the discharge space on the molded glass plate. The cover is overlapped, and the front cover and the molded glass plate are bonded through the seal paste, the exhaust chamber is evacuated, the discharge gas is injected, the exhaust pipe is sealed, and an electrode for applying high frequency power to the discharge space is installed.

The flat lamp has a structure in which a discharge gas and a discharge electrode are provided in a closed discharge space between a front plate and a rear plate maintaining a predetermined interval. Specifically, a plurality of partitions are provided between the front plate and the back plate, which are disposed to face each other. The barrier ribs are arranged in parallel at equal intervals to form a discharge space composed of a plurality of channels, and a discharge gas (Ne, Ar, etc.) and a small amount of mercury (Hg) are injected into the discharge space, and a voltage is supplied to the discharge gas. Electrodes for applying are provided outside or inside both edges of the substrate. These flat lamps apply a voltage to the internal electrode to generate plasma discharge by the discharge gas to generate high-temperature electrons that excite the atoms and molecules of the neutral gas, and the atoms and molecules excited by the electrons fall to the ground state. Ultraviolet rays are generated and the ultraviolet rays excite the phosphor coated on the inner wall of the discharge space to generate visible light therefrom.

Looking at such a conventional flat lamp with reference to Figure 1a, the conventional flat lamp includes a light source body 110, the electrode 140 provided on both sides of the outer peripheral surface of the light source body (110). The light source body 110 includes first and second substrates (not shown) disposed to face each other at predetermined intervals. A plurality of partition walls 120 are disposed between the first and second substrates to partition the space between the first and second substrates into a plurality of discharge spaces 150. The sealing member 130 is disposed between the edges of the first and second substrates to isolate the discharge spaces 150 from the outside. Discharge gas is injected into the isolated discharge space 150. The partition walls 120 are alternately arranged such that the discharge spaces 150 have a serpentine structure. In addition, a movement passage 160 of discharge gas is formed between the partition wall 120 and the sealing member 130.

However, in this case, however, since the passage is substantially orthogonal to the longitudinal direction of the discharge space, there is a problem that the current rapidly moves to another discharge space, and the current drift phenomenon is very severe.

In order to overcome this, in a flat lamp having the same configuration as shown in FIG. 1B, a passage 160 for flowing discharge gas into each discharge space 150 is formed in the partition wall 120, and the passage ( 160 also provided a way to install inclined in the longitudinal direction of the partition wall (160 of FIG. 1b).

The passage 160 formed on the flat lamp serves as a passage for connecting the upper and lower plates of the surface light source to connect the respective discharge spaces to inject the mixed gas and diffuse the additionally injected mercury. However, in the flat lamp, the length of the passage 160 is increased to generate independent and stable discharge in each discharge space. In the trend of a large-area device, it takes a long time for the mercury to diffuse in a large area. happened.

In addition, the length of the passage 160 serves as a resistance in the discharge space, and also serves as a non-light emitting portion, which causes a difficulty in decreasing the uniformity of the luminance. In particular, there is a problem in that the production time of the product is prolonged by increasing the vacuum / exhaust time for sucking impurities due to the size and long length of the fine groove of the passage 160.

In addition, due to the presence of the passage, the temperature gradient is changed during the driving process according to the change in the environment of the flat plate lamp over time, and as the mercury moves the channel and the channel through the passage according to the temperature deviation, As mercury disappears in a certain channel, a unique red discharge (hereinafter referred to as 'Pinky discharge') caused by discharge gas other than mercury, especially Ne gas, is generated, which significantly improves the luminous efficiency of the surface light source lamp. The fatal problem of dropping occurred.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a through groove on an outer edge of the electrode portion to shorten the time of vacuum, exhaust and mercury diffusion time, and leakage of mercury. It is to provide a surface light emitting device which can improve the light emitting efficiency of surface light emitting device by fundamentally eliminating pinky discharge.

The present invention for solving the above technical problem, the lamp body having a plurality of discharge channels divided into a plurality of discharge spaces, and generates light; an electrode for applying a discharge voltage to the lamp body; And an exhaust line formed at an edge of the lamp body. It provides a surface light emitting device comprising a, to form a structure without the gas passage groove formed in the structure that partitions the discharge space to achieve a smooth and short time injecting vacuum exhaust, mixed gas, mercury .

In another aspect, the present invention provides a surface light emitting device characterized in that the surface light emitting device further comprises a through groove communicating the discharge channel and the exhaust line to facilitate the rapid vacuum exhaust and injection of the mixed gas. .

In addition, the present invention is provided with a lower substrate spaced apart from the upper substrate, characterized in that the discharge channel is formed by a plurality of discharge space divider partitioning the space between the upper and lower substrates into a plurality of discharge channels It provides a surface light emitting device to remove the gas passage groove in the inner partition wall, and to form a through groove on the side of the discharge channel to realize the injection of vacuum exhaust, mixed gas, mercury.

In addition, the present invention provides a surface light emitting device, characterized in that the discharge space partition unit is formed integrally on the lower substrate or the upper substrate to broaden the versatility of manufacturing, it is possible to implement a structure that maintains more airtight.

In addition, the present invention provides a surface light emitting device, characterized in that the through groove is arranged in a symmetrical structure on both ends of each discharge channel to realize a uniform diffusion of mercury, the surface light source is evenly lit for a long time Make it possible.

In addition, the present invention provides a surface light emitting device characterized in that the exhaust line is formed on the edge of the lamp body of the through groove is formed, pinky discharge by preventing the uneven movement of mercury according to the temperature gradient deviation Providing the to improve the efficiency of the surface light source.

In another aspect, the present invention is characterized in that the through groove is formed at one end or the other end of each of the discharge channels, it is arranged in a zigzag structure so that the position where the through groove is formed between the adjacent respective discharge channels are formed opposite to each other Square values are provided to allow for smooth exhaust and gas injection.

In addition, the present invention is the exhaust line is formed on the edge of the lamp body in which the through groove is formed, the structure is in communication with each other by at least one exhaust line formed on the edge of the lamp body on which the through groove is not formed It is possible to provide a structure capable of providing an exhaust and gas injection by providing a surface light emitting device characterized in that formed.

In addition, the present invention is that the exhaust line is formed on the edge of the lamp body in which the through groove is formed, the second through hole for communicating the discharge space divider is formed in the 2n-1 (n is a natural number) th partition wall By providing a surface light emitting device characterized in that the efficient process of the exhaust and gas injection in addition to the luminous efficiency.

In addition, the present invention provides a surface light emitting device characterized in that the electrode is formed on both ends of the surface of the lamp body to increase the discharge efficiency, it is possible to prevent the movement of mercury to the outside.

In addition, the present invention provides a surface light emitting device, characterized in that the electrode is disposed in a position or an adjacent position to coincide with the vertical direction of the exhaust line and the through groove formed in the edge portion of the lamp body, The movement of mercury in the channel can be prevented to achieve a uniform distribution of mercury.

In addition, the present invention provides a surface light emitting device, characterized in that the exhaust line is 0.1 ~ 2mm to improve the efficiency of the exhaust structure.

In addition, the present invention provides a surface light emitting device, characterized in that the through groove has a width of 0.1mm or more, the maximum width is less than the width of each discharge channel to improve the efficiency of the exhaust structure.

Hereinafter, with reference to the accompanying drawings will be described a specific configuration and operation of the present invention.

Referring to FIG. 2, the surface light emitting device 1 according to the present invention includes an upper substrate 10 and a lower substrate 20, and discharge channels 31 formed with the upper and lower substrates and a plurality of discharge spaces. It consists of a lamp body. The partition of the discharge space can be realized in a variety of ways that can be divided by the discharge space partition, and in particular, the partition is placed inside, or the inner partition is formed on the lower substrate or the upper substrate integrally, As shown in FIG. 6, the upper substrate may be formed in a curved shape by a method such as glass molding, and an integrated structure in which a discharge space is naturally formed when the lower substrate and the upper substrate are coupled may be considered. In the drawings), but the structure having the inner partition 70 is introduced as an embodiment, it can be formed in any of the above-described structure.

Referring to the configuration of the present invention through an embodiment in which the discharge space partition portion as an inner partition, an electrode is formed on the surface of the lamp body, preferably a voltage in the discharge space on the upper surface of the upper substrate 10 The electrode 30 to be applied is formed, and the position of the electrode may be arranged in various structures such as a trademark surface or a lower surface of the upper substrate. Preferably, the electrode 30 is disposed at a side edge of the upper substrate 10. In addition, the upper and lower substrate and the edge of the lamp body for connecting the edge of the inner partition wall is provided.

The edge 40 of the lemp body is disposed in contact with the lower surface of the upper substrate, it is preferably configured to be disposed on the outside of the electrode (30). Of course, the position of the electrode is preferably disposed at a position adjacent to the edge of the lamp body in the lower portion of the vertical direction (Y3, Y4) in the position formed on the upper surface of the upper substrate. In addition, the electrode may be formed at a position (lower portion of the electrode) corresponding to the edge of the lamp body.

Here, the position adjacent to the vertical direction of the rim of the lamp body is the rim of the lamp body when considering the vertical lines at both ends (Y1, Y2) of the rim of the lamp body in which the exhaust line and the through groove are formed. It means to be disposed at a position adjacent to the inner vertical line (Y2) of the both side ends of or adjacent to the outer vertical line (Y3).

In particular, a through groove 50 is formed in the upper surface of the edge 40 of the lamp body that meets both ends of each of the discharge channel 31, the through groove is an exhaust line formed on the upper surface of the edge of the lamp body It is formed in a structure in communication with 60. The through groove may be formed as a separate groove, and the width of the through groove may be wider to form a structure in which the entire exhaust line and the discharge channel communicate with each other (when the width of the through groove is formed by the width of the discharge channel). Can be.

Of course, although not shown in the figure, an exhaust groove is formed in any one channel of the lower substrate.

Figure 3 is a plan view of the surface light emitting device of the present invention, with reference to this will be described the specific operation of the embodiment of the present invention made of the above-described configuration. Each discharge channel 31 in which the discharge space is formed is formed, and a through groove 50 is formed on an upper surface of the edge 40 of the lamp body that meets the discharge channel. In addition, the through groove has a structure in communication with the exhaust line (60a, 60b) in the region behind the electrode (30). As described above, the through groove may be formed as a separate groove, and the width of the through groove is formed wide so that the entire exhaust line and the discharge channel communicate with each other (the width of the through groove is the width of the discharge channel). Can be formed).

Preferably, the width of the through hole is 0.1 mm or more, and the maximum width may be less than or equal to the width of the discharge space (discharge channel). When the width of the through groove 50 is 0.1 mm or less, This is because it is difficult to pass. In addition, the width of the through groove may be adjusted in consideration of the formation width of the exhaust line, and as described above, the through groove may be broadly formed to be the same as the width of each discharge channel.

That is, the through groove 50 is formed on the upper surface of the rim partition wall (rim portion of the lamp body) at both ends of the discharge channel, is formed for each discharge channel is arranged in a symmetrical structure, each through groove is the border partition wall It is made of a structure in communication with the exhaust line formed on the.

 In addition, the configuration of the exhaust line may be configured to communicate with each exhaust line is further provided with at least one or more in the edge other than the (60a or 60b) formed in the longitudinal direction for the efficiency of the exhaust. Impurities are removed at high temperatures and the mixed gas is injected through the exhaust lines 60a and 60b, and the injected mixed gas may be introduced into the through groove 50 of the discharge channel 31. The width of the exhaust line is preferably formed in 0.1 ~ 2mm. This is because gas passage is difficult to 0.1 mm or less.

In addition, the injection and diffusion of mercury is carried out in the same manner. Of course, in the exhaust process, an exhaust hole (not shown) formed in a predetermined portion of the lower substrate is provided for exhaust.

Electrodes are positioned at both ends of the upper surface of the lamp body, which prevents the mercury inside the discharge channel from moving toward the through groove. That is, when a gas passage groove is formed in the center portion of the partitions of FIGS. 1A and 1B according to the related art, even if the gas passage groove is minute, a temperature deviation occurs in each channel by driving the lamp for a long time. However, due to this temperature variation, mercury may move between channels due to the mercury's ability to move to the boundary between the hot and cold regions within the channel. Therefore, mercury moves through the gas passage groove due to this phenomenon, and in this case, mercury disappears in a specific channel, and thus only Ne, which is relatively stable to a temperature difference, remains, causing a red discharge unique to Ne gas ( Pinky discharge).

Therefore, in the present invention, it is preferable that the arrangement of the electrode portion is located on the line immediately above or adjacent to the edge of the lamp body in which the through groove and the exhaust line are formed as described above. That is, it is preferable to remove the conventional gas passage grooves from the inner partition wall, and to arrange the electrodes so that the edges of the lamp body (adjacent in the vertical direction of the border partition wall) are below the upper substrate on which the electrodes are formed.

This is because the electrode of the surface light emitting device to form a relatively high temperature, the mercury is prevented from moving toward the through groove by the high temperature of the electrode portion can prevent the leakage of mercury in each discharge channel. That is, mercury maintains a certain amount in each channel, thereby fundamentally solving the pinky discharge phenomenon.

Particularly, in a structure having a gas passage groove in a conventional inner partition, it takes more than 2 hours to diffuse mercury, and the uniformity of mercury diffusion per discharge channel occurs, but in the present invention, 1 hour is used to diffuse mercury. Through holes and exhaust lines leading to each discharge channel with the following time are provided, which enables the uniform diffusion. In particular, the vacuum forming time is reduced by about 50% compared to the conventional invention, the exhaust holding time has the advantage of shortening 60%.

Another embodiment of the present invention is described below.

Referring to FIG. 4, as another embodiment of the present invention, one through groove 50 formed at an upper side of an edge portion of the lamp body (border partition wall) on each side of each discharge channel 31 is provided for each discharge channel. Take the structure to be formed, it is possible to take a structure that is formed to cross each other, that is, arranged in a zigzag between the adjacent discharge channels. In this case, the exhaust line is preferably formed in two longitudinal directions 60a and 60b and in the horizontal direction 60c at the edge of the lamp body. To increase the efficiency of the exhaust. Of course, the through grooves formed in the transverse direction may be formed in the transverse direction opposite to the transverse direction 60c.

Referring to FIG. 5, as another embodiment of the present invention, the through grooves 50 are arranged in a zigzag form by forming one through groove at one end of each side of each discharge channel 31. As in the example, the exhaust lines are formed in two (60a, 60b) and the through-holes 51 are formed in the inner partition.

In this case, forming the through hole 51 in the inner partition wall is similar to the conventional art, but may be formed in any part of the inner partition wall in position, and the through groove 50 is formed on the edge partition wall of the discharge channel. As it is formed at the end and communicates with the exhaust line, there is no problem of uneven distribution of mercury due to the movement of mercury in the prior art. There is an advantage to increase the efficiency.

The through hole 51 may be disposed at an odd number of inner partitions of the inner partition. That is, as shown in Figure 5 is to form in the 2n-1, that is, the first, third, and fifth inner partition from the top of the lamp body. Of course, the structure of forming the through-holes in all internal partitions can also be considered. That is, even in such a case, the through grooves 50 formed at both ends of the discharge space exist and communicate with the exhaust line. Thus, there is no problem such as lack of mercury due to the movement of mercury described above.

Referring to FIG. 6, there is shown another embodiment in which a discharge channel 31 is formed by dividing a discharge space of the present invention, and a structure in which an inner partition is integrally formed on the upper substrate 10, that is, a discharge space partition portion. 71 shows a structure in which a part of the upper substrate can be replaced. In this case, the exhaust line 60 is integrally formed at the edge of the lamp body, and the through groove 50 for communicating the exhaust line with the discharge channel may be integrally formed on the upper substrate. In the present exemplary embodiment, the lower substrate is formed of a flat substrate. Alternatively, the discharge space compartment may be formed on the lower substrate, and the upper substrate and the lower substrate may be formed to be symmetrical with the structure of the upper substrate. It is possible.

That is, the discharge space is formed as a discharge space compartment through glass forming using glass forming, without the addition of a separate configuration, and the exhaust line and the inside of the edge of the lamp body formed by the upper or lower substrate. Will be able to form a through groove. The electrode 30 may be disposed on an upper side or an adjacent side of the edge of the lamp body in which the exhaust line is formed, as in the embodiment of the present invention described above.

In the detailed description of the invention as described above, specific embodiments have been described. However, many modifications are possible without departing from the scope of the invention. The technical spirit of the present invention should not be limited to the described embodiments of the present invention, but should be determined not only by the claims, but also by those equivalent to the claims.

According to the present invention, a through groove is formed on the outer edge of the electrode to shorten the time of vacuum, exhaust and mercury diffusion time, and essentially eliminates pinky discharge due to the leakage of mercury, thereby improving the luminous efficiency of the surface light emitting device. Has the effect of improving.

Claims (13)

A lamp body having a plurality of discharge channels divided into a plurality of discharge spaces and generating light to emit light; An electrode for applying a discharge voltage to the lamp body; And An exhaust line formed at an edge portion of the lamp body; Surface light emitting device comprising a. The method according to claim 1, The surface light emitting device further comprises a through groove for communicating the discharge channel and the exhaust line. The method of claim 2, wherein the lamp body, And a lower substrate spaced apart from an upper substrate, wherein the discharge channel is formed by a plurality of discharge space dividers which divide a space between the upper and lower substrates into a plurality of discharge channels. The method according to claim 3, The discharge space dividing unit is a surface light emitting device, characterized in that the structure is formed integrally on the lower substrate or the upper substrate. The method according to claim 3, And the through grooves are arranged in a symmetrical structure at both ends of the respective discharge channels. The method according to claim 5, The exhaust line is a surface light emitting device, characterized in that formed on the edge of the lamp body of the through groove is formed. The method according to claim 3, The through groove is formed on one end or the other end of each discharge channel, the surface light emitting device, characterized in that arranged in a zigzag structure so that the position where the through groove is formed between each adjacent discharge channel is formed opposite to each other. The method according to claim 7, The exhaust line is formed on the edge of the lamp body in which the through groove is formed, characterized in that the structure is in communication with each other by at least one exhaust line formed on the body edge of the side in which the through groove is not formed. Surface light emitting device. The method according to claim 7, The exhaust line is formed on an edge of the lamp body in which the through groove is formed, and surface emission is characterized in that a second through hole for communicating the discharge space divider is formed in the 2n-1 (n is a natural number) partition. Device. The method according to any one of claims 1 to 9, And the electrodes are formed at both ends of the surface of the lamp body. The method of claim 10, wherein the electrode, And a surface light emitting device disposed at a position corresponding to or perpendicular to a vertical upper direction of a length direction of the exhaust line and the through groove formed at an edge portion of the lamp body. The method according to claim 10, The width of the exhaust line is a surface light emitting device, characterized in that 0.1 ~ 2mm. The method according to claim 12, The through groove has a width of more than 0.1mm, the maximum width is less than the width of each of the discharge channel surface light emitting device.

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