KR100778840B1 - Flat luminescence lamp and method for manufacturing the same - Google Patents

Abstract

According to the present invention, a substrate in contact with an LCD panel is used as a substrate to which a light diffusing agent is added or a light scattering pattern is formed on the top and back surfaces of the substrate, thereby effectively removing the dark lines caused by the supporting rods, thereby providing a separate diffusion sheet and a diffusion plate. The present invention relates to a surface light emitting lamp which is not necessary, and a method of manufacturing the same. The surface light emitting lamp of the present invention includes a first substrate, a second substrate facing the first substrate, and a light emitting layer formed between the first substrate and the second substrate. And a light diffusing agent is added to the second substrate itself. The method of manufacturing a surface light emitting lamp of the present invention includes the steps of forming a first substrate and a second substrate; Forming a light emitting layer between the first substrate and the second substrate; Adhering and sealing the first substrate and the second substrate at a predetermined interval, and the forming of the second substrate includes adding a light diffusing agent into the second substrate. .

Light Diffusion, Light Scattering Patterns

Description

Flat luminescence lamp and method for manufacturing the same

1 is a plan view of a surface emitting lamp according to the prior art

FIG. 2 is a cross-sectional view of a surface light emitting lamp taken along line II ′ of FIG. 1.

3 is a plan view of a surface emitting lamp according to the present invention;

4 is a cross-sectional view of a surface light emitting lamp according to a first embodiment of the present invention.

5A through 5D are cross-sectional views illustrating a method of manufacturing a surface light emitting lamp according to a first embodiment of the present invention.

6A and 6B are cross-sectional views of a surface light emitting lamp according to a second embodiment of the present invention.

7A and 7B are cross-sectional views of a surface emitting lamp according to another embodiment of the present invention.

8A through 8D are cross-sectional views illustrating a method of manufacturing a surface light emitting lamp according to a second embodiment of the present invention.

Explanation of symbols for main parts of the drawings

31,61: first substrate 31a, 61a: second substrate

33,63: first electrode 33a, 63a: second electrode

35: first lead wire 35a: second lead wire

37,67: dielectric layer 38,68: first phosphor layer                 

38a, 68a: second phosphor layer 41, 71: support rod

TECHNICAL FIELD The present invention relates to a light emitting lamp, and more particularly, to a surface emitting lamp and a method of manufacturing the same.

Ultra-thin flat panel display devices with a display screen thickness of only a few centimeters (Cm), especially liquid crystal displays (LCDs) are mainly used for notebook computers, monitors, spacecraft, aircraft, etc. The field is wide and diverse.

Among the liquid crystal display devices, the passive light emitting liquid crystal display device is equipped with a backlight (back light) used as a light source behind the liquid crystal panel, and the mounting of the backlight is inefficient in terms of thickness, weight, and power consumption. Is going on.

In general, a so-called backlight used as a light source of a liquid crystal display device is a method of disposing a cylindrical fluorescent lamp, and is divided into a direct type method and a light guide plate method.

In the direct type, fluorescent lamps are placed on a flat surface. Since the shape of the fluorescent lamps appears on the liquid crystal panel, the gap between the lamp and the liquid crystal panel must be maintained, and light scattering means must be arranged for the uniform distribution of light. There is.

In addition, as the panel becomes larger, the area of the light exit surface of the backlight also increases. When the direct type backlight is enlarged, the light exit surface is not flat unless the light scattering means has a sufficient thickness. There is a limit in thinning since the thickness must be sufficiently secured.

On the other hand, the light guide plate method is to install a fluorescent lamp on the outside and to distribute the light to the entire surface using the light guide plate, the fluorescent lamp is installed on the side, there is a problem that the brightness is low because the light must pass through the light guide plate. In addition, high optical design and processing technology for the light guide plate is required for uniform distribution of light intensity.

Currently, as part of implementing a high-brightness backlight, a direct backlight having a plurality of lamps disposed below the display screen or a single lamp bent is proposed. Recently, a surface facing the display surface of the panel has been proposed. Surface emitting backlights that emit light in their entirety are being researched and developed.

Hereinafter, a surface light emitting lamp according to the prior art will be described with reference to the accompanying drawings.

1 is a plan view of a conventional surface light emitting lamp, Figure 2 is a cross-sectional view taken along the line II 'of FIG.

As shown in FIG. 1, the conventional surface emitting lamp includes a lower plate 11 and an upper plate 11a, a first electrode 13 and a second electrode 13a formed on the lower plate 11, and the lower plate 11. And four frames 19a, 19b, 19c, and 19d formed of soldering means such as glass solder for sealing the upper plate 11a, and formed between the lower plate 11 and the upper plate 11a. It is composed of a support bar (21) for supporting.

Here, any one of the first electrode 13 and the second electrode 13a may be formed as a pair so that the first electrode 13 and the second electrode 13a are alternately formed, or not shown in the drawing. Although not shown, one first electrode 13 and one second electrode 13a may be formed.

The first electrodes 13 are connected to the first lead line 15, and the second electrodes 13a are connected to the second lead line 15a so as to be connected from the outside through the first and second lead lines 15 and 15a. Voltage is applied.

A discharge space is formed by bonding and sealing the lower plate 11 and the upper plate 11a at a predetermined interval, and the surface facing the discharge space is covered with a fluorescent material. In the discharge space, xenon (Xe) gas, which induces discharge, emits UV while forming a plasma, and the emitted UV collides with a fluorescent material formed on the upper plate 11a and the lower plate 11 to generate visible light.

In addition, the lower plate 11 is further provided with a reflecting plate (not shown) for preventing the visible light produced in the discharge space to escape to the back of the lower plate 11, the support rod 21 is to inhibit the emission of visible light It is made of glass.

This will be described in more detail with reference to the cross-sectional view shown in FIG. 2 as follows.

As shown in FIG. 2, a first electrode 13 and a second electrode 13a are formed on the lower plate 11 of glass material, and a dielectric layer is formed on the entire surface including the first and second electrodes 13 and 13a. (17) is formed. The first phosphor layer 18 is formed on the dielectric layer 17.

The second phosphor layer 18a is formed on the upper plate 11a made of glass, and the frames 19a and 19b for sealing the lower plate 11 and the upper plate 11a are formed, and the rear surface of the lower plate 11 is formed. A heat sink (not shown) for dissipating heat generated at the time of discharge to the outside is formed.

As such, after the lower plate 11 and the upper plate 11a are manufactured, the upper plate 11 and the upper plate 11a are sealed using the frames 19a, 19b, 19c, and 19d. When sealing in a high vacuum state, the upper plate may sag down or be damaged. As the case occurs, the supporting rod 21 must be formed between the lower plate 11 and the upper plate 11a before sealing.

In the conventional surface emitting lamp configured as described above, when a voltage is applied to the first lead line 15 and the second lead line 15a, a discharge occurs between the first electrode 13 and the second electrode 13a. Emits UV while forming a plasma, and visible light generated while the UV collides with the first and second phosphor layers 18 and 18a is emitted to the LCD panel through the top plate 11a.

However, the conventional surface emitting lamp as described above forms a support rod having a diameter of several mm between the lower plate and the upper plate in order to prevent breakage of the substrate due to adhesion and sealing of the two substrates. Since the visible light is disturbed by the supporting rods, dark lines are generated on the display surface.                         

Therefore, to compensate for this non-uniform light distribution, a plurality of diffusion sheets and diffusion plates must be disposed between the top plate and the display surface of the liquid crystal, which may increase the weight and thickness of the surface emitting lamp. In addition, there was a problem acting as a factor to increase the manufacturing cost.

The present invention has been made to solve the above-mentioned problems of the prior art, by inducing uniform light distribution to form a diffusion sheet and a diffusion plate or to minimize the number of the weight and thickness of the product can be reduced It is an object of the present invention to provide a surface emitting lamp and a method of manufacturing the same.

According to an aspect of the present invention, there is provided a surface light emitting lamp including a first substrate, a second substrate facing the first substrate, and a light emitting layer formed between the first substrate and the second substrate. A light diffusing agent is added to the substrate itself, and the method of manufacturing the surface light emitting lamp of the present invention includes the steps of forming a first substrate and a second substrate; Forming a light emitting layer between the first substrate and the second substrate; Adhering and sealing the first substrate and the second substrate at a predetermined interval, and the forming of the second substrate includes adding a light diffusing agent into the second substrate. .
In addition, the surface light emitting lamp according to another embodiment of the present invention and the first substrate; A second substrate facing the first substrate; A light scattering pattern provided on at least one of an upper surface and a rear surface of the second substrate; A support rod formed between the first substrate and the second substrate; And a frame for adhering and sealing the first substrate and the second substrate, wherein the manufacturing method includes at least one of an upper surface and a rear surface of the first substrate and the second substrate facing the first substrate. Forming a light scattering pattern on one surface; Forming a light emitting layer between the first substrate and the second substrate; Bonding and sealing the first substrate and the second substrate at a predetermined interval, wherein the forming of the light scattering pattern comprises applying a light scattering agent on the second substrate, and selectively selecting the light scattering agent. And patterning to form a light scattering pattern.

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The surface light emitting lamp of the present invention adds a light diffusing agent to the top plate itself to form a uniform light distribution, or forms a light scattering pattern on at least one surface of the top and back of the top plate.

Therefore, the dark line by the support rod can be removed effectively, without forming a diffusion sheet and a diffusion plate, and the uniform light-weight distribution in a light emitting surface can be obtained.

Hereinafter, exemplary embodiments of the surface light emitting lamp and a method of manufacturing the same will be described with reference to the accompanying drawings.

3 is a plan view of a surface light emitting lamp according to a first exemplary embodiment of the present invention, and FIG. 4A is a cross-sectional view taken along line II ′ of FIG. 3.

First, as shown in FIG. 3, the surface light emitting lamp according to the first embodiment of the present invention may be formed of a first substrate 31 made of glass and opposed to the first substrate 31 and having a light diffusing agent added thereto. The second substrate 31a, the first electrode 33 and the second electrode 33a formed on the first substrate 31, and the voltage applied from the outside are respectively the first electrode 33 and the second electrode ( A supporting rod for supporting the second substrate 31a, formed between the first lead wire 35 and the second lead wire 35a, and the first substrate 31 and the second substrate 31a, which are delivered to 33a). It is comprised including 41.

Here, the first substrate 31 and the second substrate 31a are bonded and sealed by the frames 39a, 39b, 39c, and 39d such as glass solder.

A diffusion sheet or a diffusion plate may be formed on the rear surface of the second substrate 31a, but since a light diffusing agent is added to the second substrate 31a itself, even if the diffusion sheet or the diffusion plate is not formed, uniformity in the light emitting surface is obtained. One light quantity distribution can be obtained.

The surface light emitting lamp according to the first embodiment of the present invention as shown in the cross-sectional view shown in Figure 4a, the first electrode 33 and the second electrode 33a at regular intervals on the first substrate 31. ) And a dielectric layer 37 is formed to cover the first electrode 33 and the second electrode 33a.

A first phosphor layer 38 is formed on the dielectric layer 37, and a second phosphor layer 38a is disposed on an opposite surface of the second substrate 31a to which the first substrate 31 is opposed and to which a light diffusing agent is added. The support rod 41 is formed at regular intervals between the first substrate 31 and the second substrate 31a.

Here, as shown in FIG. 4A, both the first electrode 33 and the second electrode 33a are formed on the first substrate 31, but as shown in FIG. 4B, the first electrode 33 and the second electrode are formed. The electrode 33a may be formed by separating the first substrate 31 and the second substrate 31a, and both the first electrode 33 and the second electrode 33a are formed on the first substrate 31. In the case of forming, it is preferable that the electrode material is formed of a metal having a small specific resistance such as silver (Ag), chromium (Cr), platinum (Pt), or copper (Cu), and the first substrate 31 and the second substrate. In the case of separately forming 31a, the electrode toward the second substrate 31a may be formed of a transparent conductive material, for example, indium tin oxide (ITO).

Meanwhile, a reflective material layer (not shown) may be further formed on the dielectric layer 37 on the first substrate 31. The reflective material layer is made of AlN, BaTiO ₃ , SiN _X , SiO _X, and the like, which is generated when UV generated by the discharge of the first electrode 33 and the second electrode 33a collides with the phosphor layer and is excited. The visible light is formed so as to be focused toward the second substrate 31a without exiting toward the first substrate 31.

The surface light emitting lamp according to the present invention connects an external power source to each of the first electrode 33 and the second electrode 33a, and then connects the respective electrodes to each electrode through the first lead wire 35 and the second lead wire 35a. When a voltage is applied, the fluorescent gas forms UV in the discharge space and generates UV.

The generated UV is excited while colliding with the first phosphor layer 38 and the second phosphor layer 38a to produce visible light, and the visible light is emitted toward the LCD panel (not shown) through the second substrate 31a. . At this time, since the light diffusing agent is added to the second substrate 31a itself, it is not necessary to form a separate diffusion sheet or a diffusion plate.

In the method of manufacturing the surface light emitting lamp according to the first embodiment of the present invention, first, as shown in FIG. 5A, a first substrate 31 and a second substrate 31a to which a light diffusing agent is added are prepared. The first electrode 33 and the second electrode 33a are formed on the first substrate 31 by using silk printing, vapor deposition, or photolithography.

Herein, the light diffusing agent is added during fabrication of the second substrate 31a, and the first electrode 33 and the second electrode 33a are silver (Ag), chromium (Cr), platinum (Pt), Use a metal with low specific resistance, such as copper (Cu).                     

As shown in FIG. 5B, after the dielectric layer 37 is formed on the entire surface including the first electrode 33 and the second electrode 33a, the first phosphor layer 38 is formed on the dielectric layer 37. The second phosphor layer 38a is formed on the second substrate 31a on the surface opposite to the first substrate 31. In this case, the dielectric layer 37 may be formed on the entire surface of the substrate, or may be selectively patterned to cover only the first electrode 33 and the second electrode 33a.

In addition, a reflective material layer (not shown) such as AlN, BaTiO ₃ , SiN _X , or SiO _X may be formed on the dielectric layer 37 before the first phosphor layer 38 is formed.

Subsequently, as shown in FIG. 5C, after the supporting rod 41 is formed between the first substrate 31 and the second substrate 31a, the first substrate 31 and the first substrate 31 are formed as shown in FIG. 5D. After bonding the second substrate 31a, fluorescent gas is injected through a gas injection hole (not shown), and a frame is formed by soldering using soldering means such as glass solder to seal the two substrates. The manufacturing process of the surface emitting lamp according to the embodiment is completed.

As described above, the first embodiment of the present invention adds a light diffusing agent in the process of manufacturing the second substrate 31a so that the second substrate 31a itself contains the light diffusing agent. It is not necessary to form a plurality of diffusion sheets and diffusion plates on the second substrate 31a in order to remove them.

On the other hand, the surface light emitting lamp according to the second embodiment of the present invention forms a light scattering pattern on at least one of the upper surface and the rear surface of the second substrate to prevent the dark line by the support rod, thereby uniform light distribution in the light emitting surface It is characterized by that it can be obtained.                     

Hereinafter, a surface light emitting lamp according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6A is a cross-sectional view of a surface light emitting lamp according to a second embodiment of the present invention, in which a light scattering pattern 100a is formed on both an upper surface and a rear surface of a second substrate 61a, but as in FIG. 7A, The light scattering pattern 100a may be formed only on the upper surface of the second substrate 61a, and as shown in FIG. 7B, the light scattering pattern 100a may be formed only on the rear surface of the second substrate 61a.

That is, the surface light emitting lamp according to the second embodiment of the present invention includes a first substrate 61 and a second substrate facing the first substrate 61 and having a light scattering pattern 100a on the top and bottom surfaces thereof, respectively. 61a, first and second electrodes 63 and 63a formed on the first substrate 61, dielectric layers 67 formed to cover the first and second electrodes 63 and 63a, and The first phosphor layer 68 formed on the dielectric layer 67, the second phosphor layer 68a formed on the opposing surface of the second substrate 61a opposite the first substrate 61, and the first substrate. It comprises a support bar 71 formed between the 61 and the second substrate (61a).

In this case, as shown in the drawing, the first electrode 63 and the second electrode 63a are formed on the first substrate 61, but as shown in FIG. 6B, the first electrode 63 is formed on the first substrate 61. 63 may be formed and a second electrode 63a may be formed on the second substrate 61a, and the first electrode 63 and the second electrode 63a may be formed on the first substrate 61. The electrode material is preferably formed of a metal having a low specific resistance such as silver (Ag), chromium (Cr), platinum (Pt), or copper (Cu), and the first and second substrates 61 and 61a. In the case where the electrode is separated from each other, the electrode on the side of the second substrate 61a is preferably formed of a transparent conductive material, for example, indium tin oxide (ITO).

Meanwhile, a reflective material layer (not shown) may be further formed on the dielectric layer 67 on the first substrate 61. The reflective material layer may be formed of AlN, BaTiO ₃ , SiN _X , or SiO _X, and may be generated when UV generated by the discharge of the first electrode 63 and the second electrode 63a collides with and excites the phosphor layer. The visible light is formed so as to be focused toward the second substrate 61a without escaping toward the first substrate 61.

In the surface light emitting lamp of the present invention, an external power source is connected to the first electrode 63 and the second electrode 63a, respectively, and then a voltage is applied to each electrode through the first and second lead wires (not shown). When applied, the fluorescent gas generates UV while forming plasma in the discharge space.

The generated UV is excited while colliding with the first phosphor layer 68 and the second phosphor layer 68a to produce visible light, and the visible light is emitted toward the LCD panel (not shown) through the second substrate 61a. . At this time, since the light scattering pattern 100a is formed on the upper and rear surfaces of the second substrate 61a, it is not necessary to form a separate diffusion sheet or a diffusion plate.

The method of manufacturing the surface emitting lamp according to the second embodiment of the present invention will be described with reference to FIGS. 8A to 8D.

First, as shown in FIG. 8A, the first substrate 61 and the second substrate 61a are prepared, and then the light scattering agent 100 is disposed on both surfaces of the upper and rear surfaces of the second substrate 61a. Apply liquid glass molecules.

Subsequently, as shown in FIG. 8B, the liquid crystal glass molecules are solidified and then selectively patterned using a photolithography process to form the light scattering pattern 100a. After the first electrode 63 and the second electrode 63a are formed on the first substrate 61 by silk printing or vapor deposition, the first electrode 63 and the second electrode 63a are formed. The dielectric layer 67 is formed so as to cover.

In this case, the dielectric layer 67 may be formed over the entire surface of the substrate, and may be selectively patterned to cover only the first electrode 63 and the second electrode 63a.

Subsequently, as shown in FIG. 8C, a first phosphor layer 68 is formed on the dielectric layer 67, and a second surface is formed on the front surface including the light scattering pattern 100a formed on the rear surface of the second substrate 61a. The phosphor layer 38a is formed.

In addition, a reflective material layer (not shown) such as AlN, BaTiO ₃ , SiN _X , or SiO _X may be formed on the dielectric layer 67 before forming the first phosphor layer 68.

Subsequently, as shown in FIG. 8D, a supporting rod 71 is formed between the first substrate 61 and the second substrate 61a, and the first substrate 61 and the second substrate 61a are adhered to each other. Then, the fluorescent gas is injected through a gas injection hole (not shown), and a frame is formed by soldering using soldering means such as glass solder to seal the two substrates according to the second embodiment of the present invention. The manufacturing process of the surface emitting lamp is completed.

On the other hand, although not shown in the drawings, a structure in which the first and second embodiments of the present invention are combined is also possible.

In other words, if a second substrate in contact with the LCD panel is used as a substrate with a light diffusing agent added thereto, and light scattering patterns are formed on the upper and rear surfaces of the second substrate, respectively, a uniform amount of light can be obtained on the light emitting surface. There is no need to form a diffusion sheet and a diffusion plate.

The surface emitting lamp according to the first and second embodiments of the present invention as described above can be used as a light source at the rear or front of various display devices, including a liquid crystal display device, and used as a light emitting device as such. Can be.

As described above, the surface-emitting lamp of the present invention and its manufacturing method have the following effects.

First, by using the substrate itself in contact with the LCD panel as a substrate with a light diffusing agent, it is possible to effectively remove the dark lines caused by the support rod.

Second, since a light diffusing agent is added to the substrate itself or a light scattering pattern is formed on the substrate, it is not necessary to form a separate diffusion sheet and a diffusion plate. The overall thickness and weight, and thus the manufacturing cost, can be significantly reduced.

Claims (17)

A first substrate; A second substrate facing the first substrate; And a light diffusion layer formed between the first substrate and the second substrate, wherein a light diffusing agent is added to the second substrate itself. The method of claim 1, wherein the light emitting layer, A first electrode and a second electrode formed on the first substrate; A dielectric layer covering the first and second electrodes; And a first and a second phosphor layer formed on an opposite surface of the dielectric substrate and the second substrate facing the first substrate. The surface light emitting lamp of claim 1, further comprising a plurality of supporting rods between the first substrate and the second substrate. The surface light emitting lamp of claim 1, further comprising a light scattering pattern on an upper surface of the second substrate. The surface light emitting lamp of claim 1, wherein a light scattering pattern is further provided on an upper surface and a rear surface of the second substrate. A first substrate; A second substrate facing the first substrate; A light scattering pattern provided on at least one of an upper surface and a rear surface of the second substrate; A support rod formed between the first substrate and the second substrate; And a frame for adhering and sealing the first substrate and the second substrate. The surface light emitting lamp of claim 6, further comprising a first electrode and a second electrode on the first substrate. The surface light emitting lamp of claim 6, wherein a first electrode is provided on the first substrate, and a second electrode is provided on the second substrate. The surface light emitting lamp of claim 6, further comprising a diffusion sheet and a diffusion plate on a rear surface of the second substrate. Forming a first substrate and a second substrate; Forming a light emitting layer between the first substrate and the second substrate; Adhering and sealing the first substrate and the second substrate at a predetermined interval, and the forming of the second substrate includes adding a light diffusing agent into the second substrate. Surface emitting lamp manufacturing method. The method of claim 10, further comprising forming a supporting rod between the first substrate and the second substrate after forming the light emitting layer, and forming a supporting rod therebetween. The method of claim 10, wherein forming the light emitting layer, Forming a first electrode and a second electrode on the first substrate; Forming a dielectric layer to cover the first electrode and the second electrode; And forming a phosphor layer on an opposite surface of the dielectric layer and a second substrate facing the dielectric layer. The method of claim 10, wherein forming the light emitting layer, Forming a first electrode on the first substrate and forming a second electrode on the second substrate; Forming a dielectric layer on the first and second substrates to cover the first electrode and the second electrode; And forming a phosphor layer on each of the dielectric layers. The method of claim 10, wherein the second substrate containing the light diffusing agent further comprises the step of providing a light scattering pattern on at least one of the upper surface and the rear surface. Forming a light scattering pattern on at least one of an upper surface and a rear surface of the first substrate and the second substrate facing the first substrate; Forming a light emitting layer between the first substrate and the second substrate; Bonding and sealing the first substrate and the second substrate at a predetermined interval, wherein the forming of the light scattering pattern comprises applying a light scattering agent on the second substrate, and selectively selecting the light scattering agent. Surface pattern lamp manufacturing method comprising the step of forming a light scattering pattern by patterning. delete The method of claim 15, wherein the light scattering agent is formed by applying liquid glass molecules.

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