KR100827600B1 - Flat fluorescent lamp and method for fabricating thereof - Google Patents

Abstract

A flat fluorescent lamp and a manufacturing method thereof are provided to improve uniformity of its luminance by preventing mercury gas from moving to adjacent channels due to temperature variation in the channel. Plural channels are placed in parallel on a first substrate(110), and a second substrate(120) is bonded to the first substrate along an edge thereof to maintain airtightness of the channels. A connection channel(112) connects the channel, and has a cross section of one end or both ends larger than that of a center portion. A passage adhesive(113) is applied on an inner surface of the connection passage, in which after gas is introduced in the channels, the adhesive is molten by heat to interrupt the connection passage. Surface electrodes(141) are formed on both ends of the channel in a direction crossing the channel. Rear electrodes(142) are formed on both ends of the second substrate.

Description

Flat Fluorescent Lamp and Manufacturing Method Thereof {FLAT FLUORESCENT LAMP AND METHOD FOR FABRICATING THEREOF}

1 is an exploded perspective view showing a conventional flat fluorescent lamp.

2 is a cross-sectional view showing a conventional flat fluorescent lamp.

3 is a plan view and a graph showing a temperature distribution of a conventional flat fluorescent lamp.

Figure 4 is an exploded perspective view showing a flat fluorescent lamp according to the present invention.

5 is an enlarged plan view of main parts of a flat fluorescent lamp according to the present invention;

FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5; FIG.

Figure 7 is an enlarged plan view of the main portion showing another embodiment of the flat fluorescent lamp according to the present invention.

8 is a sectional view taken along the line BB of FIG.

Figure 9 is an enlarged plan view of the main portion showing another embodiment of a flat fluorescent lamp according to the present invention.

10 is a cross-sectional view taken along the line C-C in FIG.

Figure 11 is an enlarged plan view of the main portion showing another embodiment of a flat fluorescent lamp according to the present invention.

12 is a sectional view taken along the line D-D in FIG.

Figure 13 is an enlarged plan view of the main portion showing another embodiment of a flat fluorescent lamp according to the present invention.

FIG. 14 is a sectional view taken along the line E-E of FIG.

Fig. 15 is an enlarged plan view of a main portion showing still another embodiment of a flat fluorescent lamp according to the present invention;

FIG. 16 is a sectional view taken along the line FF of FIG.

※ Explanation of symbols about main part of drawing ※

100: flat fluorescent lamp 110: first substrate

111: channel 112: connection path

112a: connection portion 112b: extension portion

113: passage adhesive 120: second substrate

130: substrate adhesive 141: surface electrode

142 back electrode

The present invention relates to a flat fluorescent lamp and a method of manufacturing the same, and more particularly, to the gas channel formed in the center of the plurality of channels formed parallel to each other in the flat fluorescent lamp to move to the adjacent channel mercury filled in the channel. The present invention relates to a flat fluorescent lamp and a method of manufacturing the same.

In general, LCD (LCD) devices, which are in the spotlight in flat panel display devices, are non-luminescent devices that do not emit their own light, and thus require a backlight device having a separate light source. Such backlight devices are classified into direct type and edge type.

The above methods are classified according to the position of the light source (lamp). The edge type is a surface light source obtained by placing a light source on the side end surface of the transparent light guide plate and reflecting and diffusing one side of the light guide plate to multi-reflect light. The direct type is a method of reflecting and diffusing light emitted from the light source by placing the light source directly under the LCD cell, and placing a diffuser plate on the front of the light source and a reflector plate on the back of the light source.

The direct type is suitable for a backlight requiring high luminance because high luminance can be obtained, but has a disadvantage of low luminance uniformity. On the other hand, the edge type has the advantage of low luminance but high luminance uniformity.

Meanwhile, flat fluorescent lamps have been developed that can maintain the advantages of the direct type and the edge type and compensate for the disadvantages. These flat type fluorescent lamps are shown in FIGS. 1 and 2.

1 is a perspective view showing a conventional flat fluorescent lamp, Figure 2 is a cross-sectional view showing a conventional flat fluorescent lamp.

As referred to herein, the flat fluorescent lamp 100 includes a first substrate 110 having a plurality of channels 111 formed at equal intervals, and the first substrate 110 to seal the inside of the channel 111. It consists of a plate-shaped second substrate 120 is installed on the bottom.

A connection passage 112 is formed at the center of each channel 111 to be connected to the inside of the adjacent channel 111.

The first substrate 110 and the second substrate 120 are closely bonded by the adhesive 130.

In addition, discharge gas is injected into the channel 111.

Surface electrodes 141 for supplying power to the inside of the channel 111 are respectively provided on one end surface of the channel 111 and the bottom surface of one side of the second substrate 120.

On the other end surface of the channel 111 and the bottom of the other end of the second substrate 120, back electrodes 142 for supplying power to the inside of the channel 111 are provided.

Accordingly, power of the same polarity is applied to the surface electrode 141 and the back electrode 142 provided at one end of the channel 111, and the surface electrode 141 and the back electrode 142 provided at the other end of the channel 111. When power of the same polarity is applied to the light, light is generated in the channel 111.

When the light is generated in the flat fluorescent lamp 100 as described above, the flat fluorescent lamp 100 is raised in temperature, and the temperature distribution is flat fluorescent in the horizontal X-axis direction as shown in FIG. The temperature of both ends of the lamp 100, that is, the portion (A) in which the electrode is mounted rises sharply, and the temperature of the central portion (B) of the lamp in which discharge is mainly caused is the portion (A) in which the electrode is installed and the central portion of the lamp It is distributed in a curved shape that appears higher than (B) and draws three peaks as a whole.

On the other hand, when looking at the temperature distribution in the vertical Y-axis direction, both edge portions C tend to radiate heat more easily around the center portion B than the central portion B of the flat fluorescent lamp 100, and thus exhibit a lower temperature. It is distributed in the curved shape which draws one peak.

As such, when the temperature is unevenly distributed in the flat fluorescent lamp 100, the distribution of mercury in each channel 111 is also uneven due to the characteristic of mercury that is collected at a low temperature.

In particular, mercury is moved toward the channel 111 where the temperature is low through the connection passage 112 formed in the center of each channel 111, so that mercury is concentrated in the channel 111 formed at both ends during long-term use.

As a result, various problems have occurred such that the luminance uniformity of the lamp is not maintained and a pink phenomenon in which the mercury is scarce at the initial stage of discharge occurs.

The present invention has been invented to solve the above problems, the object of which is to increase the cross-sectional area of both ends of the channel in which the electrode is installed to improve the discharge efficiency, while increasing the width of the electrode in the outward direction of the channel to the initial starting voltage It is to provide a flat fluorescent lamp and a method for manufacturing the same that can reduce the reduction and the lighting time.

Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

The flat fluorescent lamp of the present invention comprises: a first substrate having a plurality of channels formed in parallel; A second substrate having an edge bonded to the first substrate to maintain the airtightness of the channel; A connection passage connecting the plurality of channels to each other; A passage adhesive applied to an inner surface of the connection passage so that the connection passage is not completely blocked by the contact with the second substrate; Surface electrodes provided at both ends of the channel in a direction crossing the channel; And back electrodes provided at both ends of the second substrate so as to correspond to the surface electrodes. The cross-sectional area of either or both ends connected to the channel of the connecting passage is smaller than the central portion, and the passage adhesive is heated after gas injection into the channel to soften or melt to block the connecting passage.

According to an aspect of the present invention, there is provided a method of manufacturing a flat fluorescent lamp, comprising: forming a first substrate such that a plurality of channels are connected to each other through a connection passage, wherein a cross-sectional area of one or both ends connected to the channel of the connection passage is smaller than a center portion; Applying a passage adhesive to the connection passage, but applying the inner side of the connection passage so that the connection passage is not blocked by contact with the second substrate; Applying a substrate adhesive around a surface to a second substrate corresponding to the first substrate; Bonding the first substrate and the second substrate; Evacuating the channel; Injecting mercury gas into the channel; Heating both sides of the connection passage so that the connection passage is blocked by the passage adhesive; Providing surface electrodes at both ends of the channel in a direction crossing the channel; And installing back electrodes at both ends of the second substrate so as to correspond to the surface electrodes.

Referring to the present invention having such characteristics in detail as follows.

Example 1

Figure 4 is an exploded perspective view showing a flat fluorescent lamp according to the present invention, Figure 5 is an enlarged plan view of the main portion of the flat fluorescent lamp according to the present invention, Figure 6 is a cross-sectional view taken along line A-A of FIG.

As referred to herein, in the present invention, a plurality of channels 111 are formed in parallel with each other so that a space in which discharge gas is filled is formed in the first substrate 110 having a predetermined size.

A connecting passage 112 is formed between the plurality of channels 111 so that the channels 111 pass through each other, and the connecting passage 112 is formed at the center of the channel 111. Both sides of the 112 are formed in the vertical direction of the channel 111.

On the other hand, the bottom surface of the first substrate 110 is provided with a plate-shaped second substrate 120 to seal the inside of the channel 111.

The inner surface of the connection passage 112 is coated with a passage adhesive 113 to prevent the mercury and gas diffused in the channel 111 to move to the adjacent channel 111.

In addition, a substrate adhesive 130 is coated around the surface of the second substrate 120.

Hereinafter, the manufacturing process of the flat fluorescent lamp according to the present invention will be described.

First, the passage adhesive 113 is applied to the connection passage 112 connecting the plurality of channels 111 formed in parallel with each other on the first substrate 110, and the passage adhesive 113 connects the connection passage 112. It is applied to the surface so as not to block.

Then, the plate-shaped second substrate 120 is bonded to maintain the airtightness of the channel 111, and a substrate adhesive is coated around one surface (surface in contact with the first substrate) of the second substrate 120. Then, when the first substrate 110 and the second substrate 120 is pressed, the first substrate 110 and the second substrate 120 are firmly bonded by the substrate adhesive 130.

In this case, the passage adhesive 113 applied to the inner surface of the connection passage 112 is not bonded to the second substrate 120.

As described above, after the first substrate 110 and the second substrate 120 are bonded together, the discharge gas is injected while the air inside the channel 111 is exhausted and maintained in a vacuum state.

When the vacuum and discharge gas is injected through any one channel 111 of the plurality of channels 111 when the vacuum and discharge gas are injected as described above, the channels 111 are connected to the connection path 112 formed at the center thereof. Since they are connected to each other, vacuum and discharge gas are smoothly injected.

As described above, after discharging mercury into the channel 111 after the discharge gas is injected, high temperature heat is applied to both sides of the connection passage 112 connecting the channel 111, the connection passage 112. The passage adhesive 113 applied to the inner surface of the melted as shown in Figure 6 will block the connecting passage 112.

Meanwhile, when the surface electrodes 141 are installed at both ends of each channel 111 and the back electrodes 142 are installed at both ends of the second substrate 120, the manufacture of the flat fluorescent lamp is completed.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection paths 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature difference between the channels is reduced. Is generated, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

Example 2

7 is an enlarged plan view of a main portion of another embodiment of a flat fluorescent lamp according to the present invention, and FIG. 8 is a cross-sectional view taken along line B-B of FIG.

As referred to herein, a connection passage 112 is formed between the plurality of channels 111 so that the channels 111 pass through each other. However, in the following embodiment, unlike the first embodiment, the connection passage 112 has a cross-sectional area of one end or both ends that is connected to the channel is smaller than the center portion. According to the second embodiment, as shown in Fig. 7, the connecting passage is formed in a trapezoidal shape having both ends thereof narrow at one end and wide at the other end.

On the other hand, the passage adhesive 113 is applied to the inner surface of the connection passage 112.

Therefore, the same process as in Example 1 to manufacture a flat fluorescent lamp, the passage adhesive 113 applied to the inner surface of the connection passage 112 is melted as shown in Figure 8 the imaginary line connecting passage ( 112).

After the surface electrodes 141 are installed at both ends of each channel 111, the back electrodes 142 are installed at both ends of the second substrate 120 to complete the manufacture of the flat fluorescent lamp.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection passages 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature between the channels is reduced. Even if a deviation occurs, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

Example 3

9 is an enlarged plan view of a main portion of another embodiment of a flat fluorescent lamp according to the present invention, and FIG. 10 is a cross-sectional view taken along the line C-C of FIG.

As referred to herein, a connecting passage 112 is formed between the plurality of channels 111 so that the channels 111 penetrate each other, and the connecting passage 112 is formed at the center of the channel 111. Both sides of the connection passage 112 are formed in an arc shape at both ends and a wide central portion thereof.

On the other hand, the passage adhesive 113 is applied to the inner surface of the connection passage 112.

Accordingly, as a flat fluorescent lamp is manufactured by performing the same process as in Example 1, the passage adhesive 113 applied to the inner surface of the connection passage 112 is melted as shown in FIG. 112).

After the surface electrodes 141 are installed at both ends of each channel 111, the back electrodes 142 are installed at both ends of the second substrate 120 to complete the manufacture of the flat fluorescent lamp.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection paths 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature difference between the channels is reduced. Is generated, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

Example 4

Fig. 11 is an enlarged plan view of a main portion showing still another embodiment of a flat fluorescent lamp according to the present invention, and Fig. 12 is a sectional view taken along the line D-D in Fig. 11;

As referred to herein, a connecting passage 112 is formed between the plurality of channels 111 so that the channels 111 penetrate each other, and the connecting passage 112 is formed at the center of the channel 111. Both side surfaces of the connection passage 112 are formed in a narrow rhombus shape at both ends and a wide center portion thereof.

On the other hand, the passage adhesive 113 is applied to the inner surface of the connection passage 112.

Accordingly, as a flat fluorescent lamp is manufactured by performing the same process as in Example 1, the passage adhesive 113 applied to the inner surface of the connection passage 112 is melted like the imaginary line shown in FIG. 112).

After the surface electrodes 141 are installed at both ends of each channel 111, the back electrodes 142 are installed at both ends of the second substrate 120 to complete the manufacture of the flat fluorescent lamp.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection paths 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature difference between the channels is reduced. Is generated, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

Example 5

FIG. 13 is an enlarged plan view of a main portion of another embodiment of a flat fluorescent lamp according to the present invention, and FIG. 14 is a sectional view taken along line E-E of FIG.

As referred to herein, a connecting passage 112 is formed between the plurality of channels 111 so that the channels 111 penetrate each other, and the connecting passage 112 is formed at the center of the channel 111. have.

Connection portions 112a are formed at both ends of the connection passage 112 in a vertical direction of the channel, and expansion portions 112b wider than the connection portions 112a are formed between the connection portions 112a. The expansion part 112b is formed in the shape of a wide arc at the center.

On the other hand, the passage adhesive 113 is applied to the inner surface of the connection passage 112.

Accordingly, as a flat fluorescent lamp is manufactured by performing the same process as in Example 1, the passage adhesive 113 applied to the inner surface of the connection passage 112 is melted like the imaginary line shown in FIG. 112).

After the surface electrodes 141 are installed at both ends of each channel 111, the back electrodes 142 are installed at both ends of the second substrate 120 to complete the manufacture of the flat fluorescent lamp.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection paths 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature difference between the channels is reduced. Is generated, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

Example 6

Fig. 15 is an enlarged plan view of a main portion showing another embodiment of the flat fluorescent lamp according to the present invention, and Fig. 16 is a sectional view taken along the line F-F in Fig. 15;

As referred to herein, a connecting passage 112 is formed between the plurality of channels 111 so that the channels 111 penetrate each other, and the connecting passage 112 is formed at the center of the channel 111. have.

Connection portions 112a are formed at both ends of the connection passage 112 in the vertical direction of the channel, and an expansion portion 112b wider than the connection portion 112a is formed between the connection portions 112a. The expansion part 112b has a central rhombus shape.

On the other hand, the passage adhesive 113 is applied to the inner surface of the connection passage 112.

Accordingly, as a flat fluorescent lamp is manufactured by performing the same process as in Example 1, the passage adhesive 113 applied to the inner surface of the connection passage 112 is melted as shown in FIG. 112).

After the surface electrodes 141 are installed at both ends of each channel 111, the back electrodes 142 are installed at both ends of the second substrate 120 to complete the manufacture of the flat fluorescent lamp.

When power is supplied to the electrodes of the flat fluorescent lamp manufactured as described above, light is generated in each channel 111 by the power supplied through each electrode.

In this case, different temperature distributions are generated in each channel of the flat fluorescent lamp, as shown in FIG. 3, and the connection paths 112 connecting the channels are blocked by the passage adhesive 113 so that the temperature difference between the channels is reduced. Even if is generated, mercury in the channel 111 does not move to the adjacent channel 111.

Therefore, even when the flat fluorescent lamp is used for a long time, the amount of mercury charged in each channel 111 is kept constant so that the luminance uniformity of the flat fluorescent lamp can be maintained.

As such, the present invention prevents the mercury inside the channel from being moved to an adjacent channel even if a temperature deviation occurs in the channel because the connection path connecting the channel is blocked after mercury is diffused in the channel formed in the flat fluorescent lamp. Therefore, there is a unique effect that can improve the luminance uniformity of the flat fluorescent lamp even in long-term use.

Claims (5)

A first substrate having a plurality of channels formed in parallel; A second substrate having an edge bonded to the first substrate to maintain the airtightness of the channel; A connecting passage connecting the plurality of channels to each other and having a cross-sectional area of one or both ends thereof connected to the channel to be smaller than a central portion; A passage adhesive applied to the inner surface of the connection passage so that the connection passage is not completely blocked by the contact with the second substrate, the passage adhesive being melted by heating after gas injection into the channel to block the connection passage; Surface electrodes provided at both ends of the channel in a direction crossing the channel; And And a back electrode provided at both ends of the second substrate so as to correspond to the surface electrode. delete delete delete Shaping the first substrate such that the plurality of channels are connected to each other through a connection passage, wherein a cross-sectional area of one or both ends thereof connected to the channel of the connection passage is smaller than the center portion; Applying a passage adhesive to the connection passage, but applying the inner side of the connection passage so that the connection passage is not blocked by contact with the second substrate; Applying a substrate adhesive around a surface to a second substrate corresponding to the first substrate; Bonding the first substrate and the second substrate; Evacuating the channel; Injecting mercury gas into the channel; Heating both sides of the connection passage so that the connection passage is blocked by the passage adhesive; Providing surface electrodes at both ends of the channel in a direction crossing the channel; And And installing back electrodes at both ends of the second substrate so as to correspond to the surface electrodes.

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