KR20070044938A - Surface emission unit having heating line - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light emitting device, and in particular, when the surface light emitting device is provided with a predetermined type of heating wire and the surface light emitting device is not turned on, power is applied only to the heating wire so that the surface light emitting device does not light up. The present invention relates to a surface light emitting device having a heating wire, which maintains the temperature in the device at a predetermined temperature, so that the maximum light emitting efficiency can be quickly achieved when the surface light emitting device is turned on.

The constituent means constituting the surface light emitting device with a heating wire of the present invention is applied to the front substrate and the rear substrate spaced apart from each other at a predetermined interval, and a plurality of discharge spaces formed between the front substrate and the rear substrate is the front surface A surface light emitting device comprising a phosphor for emitting light toward a substrate and a discharge electrode formed perpendicularly to a length direction of the discharge space, wherein the heating wire has a predetermined shape so as not to be in electrical contact with the discharge electrode on the rear substrate. It is characterized in that the provided.

Surface emitting, discharge electrode

Description

Surface emission unit having heating line

1 is an isolated cross-sectional view of a backlight unit of a conventional surface light emitting lamp type.

2 is a cross-sectional view of a surface light emitting device having a heating wire according to an embodiment of the present invention.

3 is an exemplary view showing various arrangements of hot wires included in a surface light emitting device having a hot wire according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

20: surface light emitting device with a heating wire 21: the front substrate

22: back substrate 23: discharge electrode

23a: positive electrode 23b: negative electrode

25: discharge space 26: partition wall

27 phosphor 28: sealing material

29: insulating layer 30: heating wire

40: power source 41: auxiliary power source

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light emitting device, and in particular, when the surface light emitting device is provided with a predetermined type of heating wire and the surface light emitting device is not turned on, power is applied only to the heating wire so that the surface light emitting device does not light up. The present invention relates to a surface light emitting device having a heating wire, which maintains the temperature in the device at a predetermined temperature, so that the maximum light emitting efficiency can be quickly achieved when the surface light emitting device is turned on.

In general, liquid crystal displays used in notebook computers, desktop computers, liquid crystal display televisions (LCD-TVs), mobile communication terminals, and the like are types of light-receiving elements, and thus require a backlight unit in addition to the liquid crystal panel. In addition, the backlight unit is used in various flat panel display (FPD) devices. Meanwhile, the surface light emitting device is not only used as a backlight unit but also used in various lighting device fields.

In the backlight unit, an edge-lighting method of injecting light of a cold cathode fluorescent lamp (CCFL) installed on a side of a light guide plate parallel to the liquid crystal panel to the liquid crystal panel by the light guide plate, and a light guide plate Instead of using a light emitting diode, a direct-lighting method in which a plurality of fluorescent lamps are arranged on the rear side of a diffusing plate disposed in parallel with the liquid crystal panel to inject light from the fluorescent lamp directly into the liquid crystal panel. have.

Recently, a surface emitting lamp method has been developed which forms a discharge space between two glass substrates arranged in parallel with each other, excites the discharge gas injected into the space, emits phosphors by ultraviolet rays, and injects the light into the liquid crystal panel. Has been.

The conventional edge type backlight unit indirectly enters the light of the fluorescent lamp installed on the side of the light guide plate into the liquid crystal panel through the light guide plate, and thus has a problem of being unsuitable for a large screen liquid crystal display having low luminance and requiring high brightness.

The conventional direct type backlight unit is to solve the problems of the conventional edge type backlight unit, and by injecting the light of the fluorescent lamp directly into the liquid crystal panel, it is possible to obtain a relatively high luminance compared to the edge type liquid crystal display device Note on

Has been used.

However, the conventional direct type backlight unit has a problem that does not correspond to the recent liquid crystal display device requiring a thinning due to the thickness of the storage container in which the fluorescent lamp is accommodated. The conventional surface emitting lamp type backlight unit solves the problems of the conventional direct type backlight unit. Instead of the fluorescent lamp housed in the storage container, the surface-emitting lamp type backlight unit emits light by exciting the phosphor coated on the glass substrate with ultraviolet rays emitted from the discharge gas. By doing so, it has a structure conforming to a liquid crystal display device requiring thinning.

In addition, the direct type backlight unit using a conventional fluorescent lamp has problems in light emission luminance and light emission efficiency, and there is a limit in disposing a fluorescent lamp over the entire surface on a plane, which makes it difficult to create uniform luminance.

The conventional surface light emitting lamp type backlight unit 10 will be described with reference to FIG. 1.

As shown in FIG. 1, in the conventional surface light emitting lamp type backlight unit 10, the front substrate 11 and the rear substrate 12 arranged in parallel to be spaced apart from each other at predetermined intervals are sealed by the sealing material 13. The discharge space 14 thus formed is partitioned by a plurality of partition walls 15 formed in a predetermined pattern, for example, in the form of a stripe.

The phosphors 16 applied to the respective discharge spaces 14 emit light by ultraviolet rays generated by excitation of the discharge gas injected into the discharge spaces 14, and the emitted light is formed on the front surface of the front substrate 11. It is configured to be incident on the liquid crystal panel (not shown) disposed in the.

Discharge electrodes 17 are formed on the rear substrate 12 at both ends in the longitudinal direction of the discharge space 14, and a dielectric layer 18 is provided on the rear substrate 12 and the discharge electrodes 17. .

According to the conventional backlight unit of the surface-emitting lamp system having the above structure, there is a problem that takes a long time required to increase the maximum luminous efficiency from the initial lighting. That is, when mercury is used as the discharge gas, since the mercury in the lamp-off state is in a liquid state, it takes a considerable time to change the mercury in the liquid state to a gas state by applying power. A problem occurs.

The present invention has been made to solve the above problems of the prior art, by providing a heating wire of a predetermined type in the surface light emitting device, so that the power is applied to the heating wire while the surface light emitting device is not turned on, the surface light emitting device It is an object of the present invention to provide a surface light emitting device having a heating wire which is capable of attaining a maximum light emitting efficiency quickly when the surface light emitting device is turned on by constantly keeping the temperature inside.

In addition, in the surface light emitting device having a vertical bulkhead in which the partitions are arranged vertically (vertical), the heating wire is provided in a portion where the liquid phase subsides, thereby providing a heating wire that can quickly achieve maximum luminous efficiency when the surface light emitting device is turned on. It is an object to provide one surface light emitting device.

In order to solve the above technical problem, the constituent means of the surface light emitting device having a heating wire according to the present invention, which are spaced apart from each other at predetermined intervals, is disposed between the front substrate and the rear substrate, and the front substrate and the rear substrate. A surface light emitting device comprising: a phosphor applied to a plurality of discharge spaces formed to emit light toward the front substrate; and a discharge electrode formed perpendicularly to a length direction of the discharge space, wherein the discharge electrode is formed on the rear substrate. It is characterized in that the heating wire of a predetermined form is provided so as not to be in electrical contact with.

In addition, the hot wire is characterized in that it is arranged perpendicular to the longitudinal direction of the discharge space.

The hot wire may be arranged in plural.

In addition, the heating wire is characterized in that it is disposed over the entire surface of the back substrate.

In addition, the heating wire is characterized in that the heating is directly supplied with power.

In addition, the heating wire is characterized in that the heating wire is indirectly heated by arranging a positive electrode and a negative electrode around the heating wire, respectively.

In addition, the discharge electrode is characterized in that using the electrode provided around the heating wire.

In addition, the surface light emitting device having the heating wire, the storage container for receiving the surface light emitting device having the heating wire; And a liquid crystal display panel for changing the light emitted by the phosphor into image light including information.

More detailed description of the constituent means of the present invention as follows.

First, the hot wire and the discharge electrode are disposed so as not to be in electrical contact with the back substrate, and an insulating layer is provided on the hot wire and the discharge electrode.

In addition, a hot wire is disposed on the rear substrate, an insulating layer is formed on the upper substrate, and the discharge electrode is provided on the bottom surface of the rear substrate.

In addition, when power is not applied to the discharge electrode, power is applied to the heating wire. That is, the inside of the surface light emitting device is in a preheated state by the heating wire while power is not applied to the discharge electrode.

In addition, the hot wire is formed perpendicular to the longitudinal direction of the discharge space, characterized in that formed on the top and bottom of the rear substrate, respectively. That is, two hot wires may be formed long at both ends of the rear substrate. In this case, the heating wire is provided in the part where the liquid mercury sinks. At this time, the positive electrode and the negative electrode is formed on both sides of the heating wire formed on the top and bottom of the rear substrate, respectively, one specific electrode and the rear substrate formed on one side of the heating wire formed on the top of the back substrate Is formed on one side of the heating wire formed on the lower end of the electrode, it is preferable that the electrode having a polarity opposite to the specific electrode is used as the discharge electrode.

In addition, the hot wire is formed perpendicular to the longitudinal direction of the discharge space, it characterized in that the plurality is arranged at a predetermined interval on the back substrate. In this case, positive electrodes and negative electrodes are formed on both sides of the plurality of hot wires arranged at predetermined intervals on the rear substrate, and one specific electrode formed on one side of the hot wire and another hot wire is formed on the rear substrate. It is preferable that an electrode having a polarity opposite to the specific electrode is used as the discharge electrode.

In addition, the heating wire is formed on the front surface of the rear substrate, it is characterized in that not formed at both ends of the rear substrate. At this time, it is preferable that a positive electrode and a negative electrode are formed at each of both ends of the rear substrate on which the heating wire is not formed, and the heating wire is directly supplied with power from a power supply source.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation and preferred embodiment with respect to the surface light emitting device having a heating wire of the present invention made of the above configuration means.

2 is a cross-sectional view of a surface light emitting device 20 having a heating wire according to a preferred embodiment of the present invention.

Referring to FIG. 2, the surface light emitting device 20 having a heating wire according to an exemplary embodiment of the present invention may include a rear substrate 22 and a plurality of discharge electrodes 23 formed perpendicular to the longitudinal direction of the discharge space 25. ), An insulating layer 29 applied on the back substrate 22 so that the discharge electrode 23 is embedded, and a crossover with the discharge electrode 23 in a predetermined pattern, for example, a stripe shape, on the insulating layer 29. A plurality of barrier ribs 26 forming a plurality of discharge spaces 25, a phosphor 27 formed between the barrier ribs 26, a back substrate 22, and a sealing material 28 are combined to inject discharge gas. And a front substrate 21 forming a plurality of discharge spaces 25.

In the above structure, the hot wire 30, which is a characteristic component of the present invention, is disposed on the back substrate 22 in a predetermined shape. Therefore, the heating wires 30 are disposed on the rear substrate 22 together with the discharge electrodes 23 so as not to be in electrical contact with each other.

In FIG. 2, both the heating wire 30 and the discharge electrode 23 are disposed on the rear substrate 22 so as not to be in contact with each other, and the insulating layer 29 includes the rear substrate 22 and the discharge electrode 23. ) And hot wire 30 is applied.

In addition, in FIG. 2, the heating wire 30 and the discharge electrode 23 are stacked, but this is merely to show the heating wire 30 and the discharge electrode 23 at the same time. Only the discharge electrode 23 or only the heating wire 30 should be shown. This is because the heating wire 30 and the discharge electrode 23 are disposed on the back substrate 22 so as not to be in electrical contact with each other.

Meanwhile, the discharge electrode 23 and the heating wire 30 may not be disposed together on the rear substrate 22 in some cases. That is, the heating wire 30 is disposed on the rear substrate 22, a thin insulating layer is covered thereon, and the discharge electrode 23 is disposed on the insulating layer, and then a separate insulating layer is covered, or On the contrary, the discharge electrode 23 may be disposed on the rear substrate 22, a thin insulating layer may be covered thereon, and the heating wire 30 may be disposed on the insulating layer, and then a separate insulating layer may be covered.

In addition, only the heating wire 30 may be disposed on the rear substrate 22, and the discharge electrode 23 may be disposed on the bottom surface of the rear substrate 22 in the form of an external electrode. However, in this case, the heating wire 30 is directly connected to the power source to generate heat.

The heating wire 30 is made of a material such as a heating element or a resistance material and generates heat at a predetermined temperature when power is applied. Preferably, an operation of generating heat at a predetermined temperature when power is applied using a heating element such as carbon heating wire is performed. The inside of the surface light emitting device may be maintained at a predetermined temperature by the heat of the heating wire 30, so that the mercury existing in the discharge space 25 may always exist in a preheated state.

The supply timing of the power applied to the heating wire 30 is separate from the supply timing of the power applied to the discharge electrode 23. That is, power is applied to the heating wire 30 only when power is not applied to the discharge electrode 23.

When power is not applied to the discharge electrode 23, power is applied to the heating wire 30 to maintain a constant temperature in the surface light emitting device, so that the mercury can be kept in a preheated state. have. That is, when the surface light emitting device is not turned on, it is preferable that power is applied to the heating wire 30 to maintain a constant temperature inside the surface light emitting device. The temperature inside the surface light emitting device by the hot wire 30 is preferably between about 30 ℃ to 50 ℃ but preferably used in a temperature range that does not affect the peripheral device.

Even when the surface light emitting device is not turned on as described above, the heating wire 30 is formed on the rear substrate 22 in a predetermined pattern so that the inside thereof can be kept in a preheated state at a constant temperature.

3 is an exemplary view illustrating various patterns of the heating wire 30 formed on the rear substrate 22.

The heating wire 30 is formed perpendicular to the longitudinal direction of the discharge space 25 formed by the vertical partition wall arrangement method, as shown in (a) of FIG. 3, the top and bottom of the back substrate 22 It may be formed on (see Fig. 3 (a)).

In this case, since the two heating wires 30 are arranged side by side on the top and bottom of the rear substrate 22, both ends of the liquid mercury in the liquid state can be preheated. By providing the hot wire 30 at both ends of the liquid mercury sinks, it can be easily used in a surface light emitting device having a vertical bulkhead structure.

When the two heating wires 30 are provided on the upper and lower ends of the rear substrate 22 as described above, discharge electrodes 23 are formed on both sides of the heating wire 30, and one of them is positive. It is used as the electrode 23a and the other as the negative electrode 23b.

In the discharge electrode 23 pattern formed as described above, one specific electrode formed on one side of the heating wire 30 formed on the top of the rear substrate 22 and the heating wire formed on the bottom of the rear substrate 22 ( 30) It is formed on one side, the electrode having a polarity opposite to the specific electrode is used as a discharge electrode 23 is a pair.

That is, as shown in (a) of FIG. 3, the positive electrode 23a formed at one side of the heating wire 30 formed on the upper end of the rear substrate 22 and the lower end of the rear substrate 22 are formed. The negative electrode 23b formed on one side of the heating wire 30 formed in the pair is used as the discharge electrode 23 by receiving power from the power supply source 40. On the contrary, the negative electrode 23b formed on one side of the heating wire 30 formed on the upper end of the rear substrate 22 and the positive amount formed on one side of the heating wire 30 formed on the lower end of the rear substrate 22 are formed. The electrodes 23a may be paired and used as the discharge electrodes 23.

When the electrodes are not used as the discharge electrodes 23, the electrodes are used as electrodes for generating the two heating wires 30 to preheat the inside of the surface light emitting device. At this time, the positive electrode 23a and the negative electrode 23b disposed on both sides of each heating wire 30 are paired to heat each heating wire 30. Meanwhile, the heating wires 30 may be heated by the electrodes 23 as described above, but may be directly connected to the power supply 40 to generate heat.

In addition, the power supply 40 may be used to supply power, and in addition to the power supply 40, an auxiliary power supply 41 may be further included. Thus, when using the power supply 40 and the auxiliary power supply 41 together, the power supply 40 can be used mainly for light emission and the auxiliary power supply 41 can be used for the hot wire.

As shown in (b) of FIG. 3, another pattern of the heating wire 30 is formed perpendicular to the longitudinal direction of the discharge space 25, and a plurality of the heating wires 30 are spaced apart from each other on the rear substrate 22. Is placed. Therefore, the mercury existing in the discharge space 25 may be maintained in a uniformly preheated state to some extent by the heating wires 30 arranged as described above.

When the plurality of heating wires 30 are arranged on the rear substrate 22 at predetermined intervals, electrodes are formed on both sides of the heating wires 30, and one of them is positive. It is used as the electrode 23a and the other as the negative electrode 23b.

In the electrode pattern formed as described above, one specific electrode formed on one side of the predetermined heating wire 30 among the plurality of heating wires and another heating wire formed on one side of the heating wire are discharged by pairing the electrodes having a polarity opposite to the specific electrode. It is used as the electrode 23.

That is, as shown in (b) of FIG. 3, the positive electrode 23a formed on one side of the heating wire 30 formed on the rear substrate 22 and disposed on the outermost left side is disposed on the outermost right side. The negative electrode 23b formed on one side of the heating wire 30 is paired to receive power from the power supply source 40 to be used as the discharge electrode 23. On the other hand, the negative electrode 23b formed on one side of the heating wire 30 formed on the left side of the rear substrate 22 and the heating wire 30 formed on the right side of the rear substrate 22 are formed on one side. The positive electrodes 23a may be paired and used as the discharge electrodes 23.

On the other hand, as shown in Figure 3 (b), if necessary to configure a pair of another electrode having a polarity opposite to each other and is used as an additional discharge electrode 23 by receiving power from the power supply source (40a) Can be. Such a case can be applied to a case where a liquid crystal panel or the like employing a surface light emitting device is large as necessary.

In addition, when the electrodes are not used as the discharge electrodes 23, the electrodes are used as electrodes for generating the plurality of heating wires 30 for preheating inside the surface light emitting device. At this time, the positive electrode 23a and the negative electrode 23b disposed on both sides of each heating wire 30 are paired to heat each heating wire 30. At this time, the positive electrode 23a and the negative electrode 23b may be powered by the auxiliary power supply 41. Meanwhile, the heating wires 30 may be heated by the electrodes 23 as described above, but may be directly connected to the power supply 40 to generate heat.

Finally, the pattern of the heating wire 30 may be disposed on the front surface of the back substrate 22, as shown in (c) and 3 (d) of FIG. At this time, the pattern of the heating wire 30 shown in (c) of FIG. 3 disposed on the front surface of the rear substrate 22 is a pattern that travels vertically or horizontally in the longitudinal direction of the discharge space 25. In addition, the pattern of the heating wire 30 illustrated in FIG. 3D disposed on the front surface of the rear substrate 22 is formed in a mesh structure. The pattern of the heating wires 30 disposed on the front surface of the rear substrate 22 is not formed at both ends of the rear substrate 22, which is a portion where the discharge electrode 23 is formed.

In the electrode pattern formed as described above, one of the electrodes is the positive electrode 23a and the other is the negative electrode 23b, and is used as the discharge electrode 23 by receiving power from the power supply source 40. In this case, the heating wire 30 may not generate heat by an electrode, but may be directly connected to the power supply 40 to generate heat.

The surface light emitting device can maintain a preheated state at a predetermined temperature even when it is not lit by the heating wire having the pattern as described above, so that the maximum light emitting efficiency can be reached quickly when lit.

On the other hand, the surface light emitting device having a heating wire having the above configuration can be used in various display devices and various lighting devices. In particular, the surface light emitting device having the above-described hot wire can be applied to a liquid crystal display device and used as a light source.

In general, a liquid crystal display device includes a liquid crystal display panel and a light emitting device for irradiating light to the liquid crystal display panel. The liquid crystal display panel converts light generated by the light emitting device into image light including information. A liquid crystal display panel for this purpose is formed by bonding a liquid crystal between a TFT (thin-film transistor) substrate and a color filter substrate. Of course, a driving module may be additionally included to drive the TFT substrate and the color filter substrate and to deflect the liquid crystal.

Meanwhile, a housing container of a predetermined form is required to accommodate the liquid crystal display panel and the light emitting device. In the present invention, the light emitting device is replaced with a surface light emitting device having a heating wire, and the surface light emitting device having the heating wire is accommodated in the storage container.

According to the surface light emitting device having a heating wire according to the present invention having the above-described configuration, operation and preferred embodiment, since the temperature in the surface light emitting device is always constantly preheated even when the surface light emitting device is not turned on, the surface When the light emitting device is turned on, there is an advantage that it is possible to quickly reach the maximum luminous efficiency. Therefore, there is an effect that can lower the initial lighting voltage for the maximum luminous efficiency.

In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (8)

A front substrate and a rear substrate spaced apart from each other at predetermined intervals, a phosphor applied to a plurality of discharge spaces formed between the front substrate and the back substrate to emit light toward the front substrate, and a length direction of the discharge space. In the surface light emitting device comprising a vertical discharge electrode, And a heating wire having a predetermined shape so as not to be in electrical contact with the discharge electrode on the rear substrate. The method according to claim 1, wherein the hot wire, Surface-emitting device having a heating wire, characterized in that arranged so as to be perpendicular to the longitudinal direction of the discharge space. The method according to claim 1, wherein the hot wire, A surface light emitting device having a heating wire, characterized in that disposed in plurality. The method according to claim 1, wherein the hot wire, Surface-emitting device having a heating wire, characterized in that disposed over the entire surface of the back substrate. The method according to claim 1, wherein the hot wire, Surface emitting device having a heating wire, characterized in that to be directly heated to be powered. The method according to claim 1, wherein the hot wire, And a positive electrode and a negative electrode respectively disposed around the hot wire to indirectly heat the hot wire. The method according to claim 1, The discharge electrode is a surface light emitting device having a heating wire, characterized in that using the electrode provided around the heating wire. The surface light emitting device according to any one of claims 1 to 7, wherein the surface light emitting device including the hot wire is provided. A storage container accommodating the surface light emitting device having the heating wire; And a liquid crystal display panel for changing the light emitted by the phosphor into image light including information.

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