KR100900088B1 - Surface light source device - Google Patents

Abstract

A surface light source device is provided. In the present invention, a plurality of ceramic-glass composite charging and discharging devices, one surface of the ceramic-glass composite device is coated with a conductor, and a phosphor for converting ultraviolet rays emitted from the discharge space between the ceramic-glass composite charging and discharging device and the device into visible light is upper part. And a reflecting surface for reflecting the converted visible light to the front surface is further applied between the lower glass plate and the phosphor, and the surface coated with the conductive layer of the charging / discharging device is not exposed to the discharge space. Connected to an external drive circuit, the ceramic-glass composite charge / discharge device is manufactured as hollow square pillar, cylindrical or rectangular rectangular parallelepiped by powder injection molding, extrusion or general press molding. Can be. Located between the lower plate and the upper plate, and comprises a frame for mounting the plurality of ceramic-glass composite charging and discharging elements. According to the present invention, the dielectric constant of the ceramic-glass composite charging and discharging device is two times higher than that of glass having a dielectric constant of about 10, and the temperature stability of the dielectric constant is excellent at -50 ° C or higher.

Surface light source, lamp, dielectric constant, electrode, top plate, bottom plate, LCD, infrared ray, ultraviolet ray.

Description

Surface light source device {Flat panel display apparatus}

1 is a view showing a partition structure of a conventional surface light source device.

2 is a view showing the structure of a conventional surface light source device.

3 is a view showing a plasma shrinkage phenomenon occurring in the conventional surface light source device.

4 is a view showing the structure of a ceramic-glass composite charging and discharging device used in the surface light source device according to an embodiment of the present invention.

Figure 5a is a side view of the lower plate according to an embodiment of the present invention, Figure 5b is a perspective view of the lower plate according to an embodiment of the present invention.

6 is a view showing a state of the side frame according to an embodiment of the present invention.

7 is a view showing a state in which the lower plate and the side frame is coupled according to an embodiment of the present invention.

8 is a view showing the appearance of the top plate according to an embodiment of the present invention.

9 is a cross-sectional view of a surface light source device according to an embodiment of the present invention.

10 is a perspective view of a surface light source device according to an embodiment of the present invention.

11 is a view for explaining the light emission principle of the surface light source device according to an embodiment of the present invention.

12 is a cross-sectional view of a surface light source device according to another embodiment of the present invention.

13 is a view showing a state of the side ceramic-glass composite charging and discharging device according to another embodiment of the present invention.

14 is a view showing the structure of a surface light source device according to another embodiment of the present invention.

15 is a view showing the appearance of a ceramic-glass composite charging and discharging device according to another embodiment of the present invention.

16 is a view showing a state of a lower plate according to another embodiment of the present invention.

17 is a cross-sectional view of a lower plate according to another embodiment of the present invention.

18 is a plan view of a lower plate according to another embodiment of the present invention.

19 is a view illustrating a state in which electrodes are connected according to an embodiment of the present invention.

20 is a view showing the appearance of a ceramic-glass composite charging and discharging device according to another embodiment of the present invention.

21 is a view showing the structure of a surface light source device according to another embodiment of the present invention.

22 is a graph showing the temperature stability of the dielectric constant for the ceramic-glass composite charging and discharging device according to an embodiment of the present invention.

23 is a graph showing the polarization amount of the ceramic-glass composite charging and discharging device according to the embodiment of the present invention.

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

40 Ceramic-Glass Composite Charge-Discharge Devices 50 Bottom Plate

60 frames 70 top plate

43 Silver Electrode 51 Lower Glass Plate

52 Glass Sealant 55 spacer

The present invention relates to a surface light source device, and more particularly to a surface light source device comprising a lamp provided with an electrode.

In general, a liquid crystal (LC) has both an electrical property in which an electric field arrangement is controlled according to an applied voltage and an optical property in which light transmittance is changed in accordance with an electric field arrangement. The image implementing apparatus including the liquid crystal described above includes a light source for generating light passing through the liquid crystal, a plurality of pixel electrodes and a cavity electrode, and a liquid crystal control part for controlling the liquid crystal.

The light source supplies light to the liquid crystal, and the light sequentially passes through the pixel electrode, the liquid crystal, and the cavity electrode. The light transmitted through the liquid crystal forms an image, the image quality of which is determined by the uniformity of brightness of the light, and the resolution of the image is determined by the number of pixel electrodes.

As the light source, a cold cathode fluorescent lamp (CCFL) having a rod shape or a light emitting diode (LED) having a dot shape may be used.

However, the above-described cold cathode ray tube type lamp and dot-shaped light emitting diode have a problem in that the luminance uniformity is weak. In order to improve the luminance uniformity of the cold cathode ray tube type lamp and the dot-shaped light emitting diode, a structure including a separate optical member such as a light guide panel and a prism sheet has been proposed. It acts as a factor to increase the volume and weight of the image forming apparatus.

In order to solve the problems of the light source described above, a planar surface light source device has been proposed as a light source. The surface light source device can be largely divided into a partition independent type and a partition integral type.

These surface light source devices have been steadily researched for the last several years, attracting attention as the next generation light source. The surface light source technology converts existing linear lamps such as CCFL, EEFL, HCFL into two-dimensional surface light sources to reduce the number of sheets used in the conventional backlight, thereby increasing the luminous flux to reduce power consumption, high brightness and high image quality. Indicates the properties. In order to implement a surface light source, a space or partition structure for maintaining a vacuum and securing a discharge space is usually required.

1 is a view showing a partition structure of a conventional surface light source device.

1 (a) is a structure in which the partition wall is installed in parallel to the lower glass. The structure as shown in Figure 1 (a) is a barrier installation method that was used in the field light source technology in the early days, the specific installation method is a method of screen printing a dielectric material, a method using a dispenser, glass using a glass adhesive A method of fixing a rod or a glass tube to the upper and lower plates, a method of grinding or sand blasting thick glass into a discharge space of a desired shape.

Figure 1 (b) shows the partition structure of the serpentine (serpentine). A detailed view of the meandering bulkhead structure of FIG. 1B is shown in FIG. 2A. As shown in FIG. 2 (a), the meandering partition wall structure is composed of a discharge space and a partition wall set in a meandering structure, and the electrodes 1 and 2 are positioned at both ends. Since the structure has a long total discharge length, a high-voltage power source must be generated at the electrodes 1 and 2 located at both ends, thereby causing a reduction in durability due to sputtering damage of the electrodes 1 and 2. There is this.

Figure 1 (c) is a structure used in OSRAM, the detailed structure thereof is shown in Figure 2 (b). As shown in Fig. 2 (b), the structure is provided with a reflecting plate 9 on the lower glass 3, and the anode electrode 5 and the cathode electrode 6 are placed crosswise and oxidized by sputtering on the electrode. A dielectric having a high secondary electron emission coefficient such as magnesium (MgO) is coated. Between the upper glass 7 and the lower glass 3 to maintain a predetermined interval by the frame 8, a fluorescent material is applied to the lower end of the upper glass (7). In addition, a spacer 4 is provided to prevent deformation of the glass during the vacuum operation. The final shape produced in this way is as shown in Figure 1 (c). However, as shown in FIG. 3, this structure has a problem in that plasma shrinkage occurs between the electrodes 5 and 6 during discharge, thereby increasing the nonuniformity of light emission. In addition, there is a problem that the production cost increases because the equipment for applying magnesium oxide (MgO) is expensive.

The present invention has been made to solve the above problems, the ceramic-glass composite is produced in a variety of shapes having a secondary electron emission coefficient significantly higher than the conventional magnesium oxide used, the charge and discharge amount more than twice The present invention relates to a method of manufacturing a surface light source which increases the brightness characteristics and durability by removing the electrode and the magnesium oxide thin film process by the sputtering process and greatly improves the process characteristics. Alternatively, the secondary electrons generated when the plasma ions, mercury ions (or xenon ions), and electrons in the vacuum discharge tube are collided with the improved charge / discharge effect of the ceramic-glass composite after being manufactured in various shapes by extrusion molding or general dry press method. By maximizing the amount of emitted light, it generates higher luminance than the existing surface light source. The present invention relates to a surface light source, and an object thereof is to provide a surface light source device characterized by enabling parallel driving.

The present invention for achieving the above object, after applying a phosphor for converting the ultraviolet light generated in the discharge space to the visible light on the upper and lower plates and the lower plate upper portion of the lower plate to the front visible light emitted to the back After forming a reflective layer for reflecting between the upper surface of the lower plate and the phosphor coated on the upper surface of the lower plate, a plurality of ceramic-glass composite charging and discharging elements having electrodes formed on only one surface of the lower plate so as not to be exposed to the discharge space are formed on the lower plate of the surface light source. It is composed of a frame for installing in various ways and forming a wiring connected to the driving circuit from the other side to which the electrode is applied, and for joining the upper plate and the lower plate.

The surface light source may include a body having an internal space in which gas is injected after vacuum exhaust, and a sealing member positioned at both ends of the body to seal the end portion after gas is injected after vacuum exhaust.

The ceramic-glass composite charging and discharging device has a dielectric constant of more than two times higher than glass or magnesium oxide having a dielectric constant of around 10, and has excellent temperature stability of dielectric constant above -50 ° C, and heat-sealing the glass sealing agent above -50 ° C. Phase transition phenomenon does not occur up to ℃, and the polarization amount in the same electric field is more than twice as large as glass or magnesium oxide, and the glass sheet constituting the surface light source by easily adjusting the coefficient of thermal expansion by changing the composition of the glass additive in the ceramic-glass composite When the ceramic-glass composite charging / discharging device material is heat-sealed with a glass sealing material, it is possible to prevent breakage due to a difference in thermal expansion coefficient, and the body may have a hollow tubular, square or plate-shaped structure.

Gas injected into the surface light source may include neon (Ne), argon (Ar), mercury gas, and may include xenon (Xe) gas substituted for mercury gas.

The lower plate may further include a spacer positioned at predetermined intervals so as to maintain a distance from the upper plate at the time of exhaust. In this case, the spacer may have the same height as the gap between the upper plate and the lower plate.

The frame may include a first frame having an open space for mounting the ceramic-glass composite charging and discharging device, and a second frame having no open space.

The frame may further include an exhaust for creating a vacuum and injecting gas to a predetermined pressure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

4 is a view showing the structure of the ceramic-glass composite charging and discharging device 40 used in the surface light source device according to an embodiment of the present invention. The structure of the ceramic-glass composite charging / discharging device 40 used in the present invention is manufactured by molding and sintering the ceramic-glass composite used as a rectangular plate-like structure, and one surface 41 is processed into a mirror surface to be discharged. It is a surface for charging and discharging ions and electrons generated in the space according to an alternating electric field applied from the outside, and the other surface 42 is coated with a silver electrode 43 as shown in FIG. The application of the electrodes as shown in Fig. 4 (b) to the narrow longitudinal side 44 is for connection with an external circuit after the surface light source is manufactured. In addition, the silver electrode 43 is formed smaller than the width of the ceramic-glass composite is applied in a slightly smaller width than the ceramic-glass composite in order to avoid the contact between the discharge ions and electrons and the silver electrode 43 during discharge. A plurality of ceramic-glass composite charge-discharge devices 40 prepared as described above are subsequently joined by a glass sealing material on the lower plate with the silver electrode 43 facing the lower plate. The lower plate 50 equipped with the ceramic-glass composite charging and discharging device is shown in FIG. 5. The surface light source device includes a plurality of ceramic-glass composite charging and discharging elements 40, a lower plate 50, a frame 60, and an upper plate 70.

The lower plate 50 is bonded to the glass sealing agent 52 with the silver electrode 43 of the ceramic-glass composite charging and discharging device 40 on the lower glass plate 51 facing the lower glass plate 51, and the ceramic-glass composite charging and discharging device ( The ceramic-glass composite charging and discharging device 40 is bonded to the phosphor 53 for converting ultraviolet rays generated during the excitation transition process of mercury or xenon gas generated between the mirror-finished upper surfaces 41 of 40 into visible light. A reflective coating 54 is formed between the phosphor 53 and the lower glass plate 51 so as to reflect the front side of the phosphor, which is converted into visible light by the phosphor. In addition, the spacer 55 is bonded using the glass sealing agent 52 like the charge / discharge element 40 in order to maintain a constant discharge space with the upper plate and prevent destruction of the upper and lower plates during vacuum exhaust after assembly. Is installed. The three-dimensional shape of the lower plate 50 provided in this way is shown in Fig. 5B. The silver electrode 43 formed on the ceramic-glass composite charge / discharge device 40 as shown in FIG. 4 is exposed to the side surface 44 as shown in 43 of FIG. 5, and the ceramic-glass composite charge / discharge device 40 is The glass sealing agent 52 is bonded to the lower glass plate 51, and the silver electrode 43 is bonded to prevent exposure to the inside of the discharge space, and the lower glass plate 51 is bonded by firing at a temperature of 490 ^° C. After that, the reflective coating 54 and the phosphor 53 are applied to a region other than the mirror-finished surface 41 of the ceramic-glass composite charging and discharging device 40. On the other hand, the side frame 60 forming the edge of the upper and lower plates is shown in FIG. A rectangular hole 62 is formed in the first frame 61 in the middle of the side frame 60 to expose the electrode of the side 44 of the ceramic-glass composite charging and discharging device 40 such as the hole 62. The frame 63 and the remaining left and right frames 64 and 65 are not formed with a rectangular hole 62 like the frame 61, and the vacuum and gas inlet 66 is installed in the frame 63. In addition, the inner surface of the frame is formed on the inner wall with the same reflective coating 54 and phosphor coating 53 as the lower plate.

7 shows a three-dimensional drawing in which the lower plate 50 and the side frame 60 formed as above are bonded using a glass sealing material.

The shape of the upper plate 70 is shown in FIG. A fluorescent substance 72 is coated on the lower portion of the upper glass plate 71 to convert ultraviolet rays emitted in the discharge space into visible light.

Referring to the drawings, a method of manufacturing a surface light source device will now be described in detail with reference to FIG. 9. On the lower plate 50 configured as shown in (a) and (b) of FIG. 5, the glass plate 52 is formed with the side frame 60 coated with the same reflector plate 54 and phosphor 53 as the lower plate as shown in FIG. 6. After bonding by using the bonding the upper plate 70 coated only the phosphor 72 using a glass sealing agent (52). In addition, after the side surface 44 of the ceramic-glass composite charging and discharging device 40 is exposed to the hole 62 of the side frame 61, the interface is also bonded using a glass sealing agent. When the heat treatment is performed for about 30 minutes at 500 ^° C., which is the heat treatment temperature of the glass sealing agent in the bonded state, only the exhaust port 66 is completely opened and sealed. After the bonding is completed, a vacuum is formed therein through the exhaust port 66, and then neon, argon gas, and mercury gas are injected. In this case, only the neon-argon and xenon gas may be injected in the case of no mercury discharge. After the gas injection is completed, the exhaust port 66 is welded using a welding machine. The surface light source device completed after such a process is shown in FIG. 10. The exposed side electrodes 43 are connected to each other using the driving circuit 80 and the conductive line 81. At this time, the light emission principle generated will be described with reference to FIG.

Xe gas charged with the buffer gas neon-argon is anode from the surface 41 of the ceramic-glass composite charging and discharging element 40 connected to the seed electron 91 and the cathode 92 introduced into the discharge space by a spacecraft or the like. Accelerated by the electric field applied to the ceramic-glass composite charging and discharging device 40 connected to the (93) in the direction of the arrow and the accelerated electrons elastically collide with the xenon gas 94 by the following formula (1) by the collision energy The xenon gas 94 is in an excited state Xe ^* . The excited xenon gas (Xe ^* ) is in a state of being electrically polarized in a slight positive polarity state, accelerated by an electric field to the charge and discharge device 40 connected to the cathode 92 is neutral xenon gas ( Collide with Xe) to form a metastable Xe ₂ ^* molecule as shown in Formula (2). This metastable Xe ₂ ^* molecule is unstable and emits 172 nm of ultraviolet light with energy hυ and returns to the stable neutral xenon gas 94 state. At this time, the generated ultraviolet rays 95 are converted into visible light 96 by the phosphor 72 and are emitted to the outside. On the other hand, the light converted into visible light by the phosphor applied to the upper side of the side frame and the lower plate serves to increase the brightness toward the upper plate by the reflecting plate.

Xe + e-> Xe ^* + e

Xe ^* + ₂ Xe-> Xe ^* ₂ + Xe

Xe ^* _2- > 2Xe + hυ

Another embodiment of the electrode structure for increasing the charge and discharge effect is shown using a cross-sectional view in FIG. At this time, the charge-discharge device 40 installed on the lower plate 50 of the ceramic-glass composite charge-discharge device 40 used is the same, and removes 64 and 65 parts of the side frame, and is formed by L-shaped charging by powder injection molding. This is the case where the charge and discharge efficiency is increased by using the discharge element 40 '. The L-shaped charging and discharging element 40 'is shown in detail in FIG. The L-shaped ceramic-glass composite charging and discharging device was produced by firing by powder injection molding as shown in FIG. The reason for having the L-shaped structure is to increase the surface area by utilizing the free space of the lower plate 50 because the capacitance value is small when the charge and discharge space between the upper and lower plates is narrow to about 2 ~ 3mm. 14 shows an integrated view of the L-shaped charging and discharging device 40 ', the rectangular charging and discharging device 40, and the lower plate 50. As shown in FIG. On the other hand, the surface facing toward the outside of the surface light source is attached to the silver electrode as shown in 43 of Figure 13 and to facilitate the connection of the charging and discharging element 40 fixed to the lower plate 50 and the driving circuit. At this time, the driving circuit 80 and the wiring 81 are shown in FIG.

Now, as another embodiment of the present invention, a surface light source device using a ceramic-glass composite charging and discharging device 400 different from the above structure is proposed as shown in FIG. 15. In the present invention, the ceramic-glass composite charging and discharging device 400 may be formed in a complex three-dimensional structure.

In the embodiment of FIG. 15, the ceramic-glass composite charging / discharging device 400 has a hexahedral structure in which a jaw 401 is formed to be coupled to the lower plate 50. That is, in the present invention, the ceramic-glass composite charging / discharging device 400 may be bonded to the lower plate 50 by applying a glass sealing material to the jaw 401. In addition, the inside of the ceramic-glass composite charging and discharging device 400 is provided with a space 402 to which the silver electrode can be applied.

In FIG. 16, a shape of a rectangular hole 501 is formed in the lower plate 50. In an embodiment of the present invention, the lower plate 50 may be provided with a spacer (not shown) to maintain a gap with the upper plate 60.

The ceramic-glass composite charging / discharging device 400 is formed to be inserted into a plurality of holes 501 of the lower plate 50, and the upper plate 60 includes a fluorescent material.

In FIG. 15, a space 402 in which the silver electrode is coated is provided in the ceramic-glass composite charge / discharge device 400, and the wiring 81 is formed on the bottom surface of the driving circuit 80 and the lower plate 50. . 17 and 18 are cross-sectional views and a plan view of the ceramic-glass composite charging and discharging device 400 of the above type inserted into the lower plate 50.

17 shows a cross section. As shown in FIG. 17, in the present invention, the ceramic-glass composite charging / discharging device 400 is formed by using the glass sealing material 403 using the jaw 401 portion of the ceramic-glass composite charging / discharging device 400. 50). In addition, a silver electrode 404 is coated in the space 402 of the ceramic-glass composite charging / discharging device 400 to be connected to the driving circuit.

FIG. 18 is a plan view illustrating a state in which the ceramic-glass composite charge / discharge device 400 is coupled to the lower plate 50.

19 shows an example of connecting the electrode according to the present invention. That is, through the silver electrode 404 formed in the ceramic-glass composite charging and discharging device 400, the ceramic-glass composite charging and discharging device 400 is connected in the longitudinal direction to the conductive wire 81, and the connected portions are connected in parallel. It can be connected to the drive circuit (80). In this way, the surface light source device can be driven by using one driving circuit 80.

A three-dimensional shape of the ceramic-glass composite charging and discharging device 200 of another embodiment is shown in FIG. 20 (a), and a cut plane is shown in FIG. 20 (b). As shown in FIG. 20, the ceramic-glass composite charging and discharging device 200 has a hollow 201 shape such as a dotted line, and an inner surface 202 is coated with a silver electrode. The ceramic-glass composite charging and discharging device 200 thus formed has a form in which the side surface 203 is exposed by being exposed to the holes of the side frame 61 as shown in FIG. 21. This form may also be polyhedral or cylindrical.

In one embodiment of the present invention, the ceramic-glass composite charging and discharging device may include a composition satisfying the following formula.

(CaO-MgO-SrO-ZrO ₂ -TiO ₂ ) + glass frit (1)
The CaO, MgO, SrO, ZrO ₂ , TiO ₂ may be composed of 0mol or more and 1mol or less, in this case, CaO + MgO + SrO = 1mol, ZrO ₂ + TiO ₂ = 1mol.
The dielectric constants and dielectric loss values at room temperature were obtained by selecting the following composition ratios in the formula (1) for each composition of the ceramic-glass composite charging and discharging devices used in the above embodiment, and are shown in Table 1.

delete

Table 1

ingredient  permittivity  Dielectric loss CaO MgO SrO ZrO ₂ TiO ₂ EC1 0.7 0.05 0.3 0.97 0.03 32.3 0.19 EC2 0.7 0.05 0.3 0.9 0.1 38.2 0.1 EC3 0.7 0.05 0.3 0.8 0.2 51.1 0.12 EC4 0.7 0.05 0.3 0.7 0.3 66.2 0.15 EC5 0.7 0.05 0.3 0.6 0.4 84.8 0.12 EC6 0.7 0.05 0.3 0.5 0.5 105.1 0.25

The glass frit is used, because it was used as a lead-free glass SF-44 is used as a lamp tube thermal expansion coefficient of 95 × 10 ^-7 / K, the addition of BaO CaO 0.6mol 0.4mol on SiO ₂ 1mol to match the thermal expansion coefficient, or lead-free After the glass composition was synthesized at 1100 ^o C by adding the glassy composition, 0.3 ~ 10wt% was added to the precursor, and MnO and Al ₂ O ₃ were used as additives. As shown in Table 1, the dielectric constant increased as the amount of TiO ₂ increased. In the manufacture of fluorescent lamps, ceramic-glass composites of the present composition are applied with alternating electric fields of 1000 Vrms or more.As the dielectric loss is lower, the exothermic phenomenon decreases, so that the dielectric loss is 0.1% due to the addition of MnO and Al ₂ O ₃ . Lowered nearby Meanwhile, the additive may include Cr ₂ O ₃ , Fe ₂ O ₃ , and the additive may be added at 0 wt% or more and 3 wt% or less. In addition, since the temperature stability of the dielectric constant of the ceramic-glass composite should be high in order to increase the stability to the temperature change of the fluorescent lamp, the results of obtaining the temperature stability of the dielectric constant in each composition are shown in FIG. 22. As shown in FIG. 22, it can be seen that the change in permittivity according to temperature change in all compositions from -30 to 250 ^° C. indicates a stable state. As the permittivity is lower, temperature stability is increased. From these results, it can be seen that the composition used in the examples of the present patent has a higher dielectric constant than glass and excellent temperature stability of the dielectric constant. In order to observe the cause of the increase in brightness of the above embodiment in more detail, the polarization amount according to the applied electric field for the respective compositions shown in Table 1 is shown in Figure 23.

As shown in FIG. 23, as the permittivity increased, the polarization value per unit area increased more than twice in the same electric field, and this phenomenon was applied to the same electric field compared to the conventional external electrode lamp in which the ceramic-glass composite electrode was made of glass only. It indicates that it can charge and discharge at least 2 times of ions or electrons in the inner wall of fluorescent lamp.

While the invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the invention and the scope of the rights set forth in the appended claims.

As described above, according to the present invention, the dielectric constant of the ceramic-glass composite charging and discharging element is two times higher than that of the glass having a dielectric constant of about 10, and the temperature stability of the dielectric constant is excellent at -50 ° C or higher.

In addition, in the present invention, the phase transition phenomenon does not occur up to 1000 ° C. at which the glass sealing agent is heat-sealed at -50 ° C. or more, and the polarization amount is more than twice as large as that of glass in the same electric field, and by changing the composition of the glass additive in the ceramic-glass composite. There is an effect that the coefficient of thermal expansion can be easily adjusted.

In addition, the present invention can prevent the breakdown due to the difference in thermal expansion coefficient when the upper and lower side glass plate and the ceramic-glass composite charging and discharging element is heat-treated by the glass sealing material, and compared to the MgO dielectric barrier for charging and discharging made of a conventional thin film, The damage caused by the sputtering phenomenon during discharge can be minimized, and the brightness can be increased more than twice.

In addition, the present invention has an effect that it is easy to manufacture a surface light source device having a high brightness characteristics using a ceramic-glass composite charging and discharging device.

Claims (23)

A lower plate in which a plurality of holes are formed; A top plate coated with a fluorescent material on the rear surface; A ceramic-glass composite charging and discharging device having a structure inserted into a plurality of holes of the lower plate, the ceramic-glass composite charging and discharging device having a dielectric material and a discharge phenomenon of the upper plate; The ceramic-glass composite charging and discharging device has a composition in which a silver electrode to which an electric field is applied from the outside is coated on one side, and satisfies the conditional formula of (CaO-MgO-SrO-ZrO ₂ -TiO ₂ ) + glass frit. Surface light source device comprising a. The method of claim 1, The hole of the lower plate is a surface light source device, characterized in that formed in a rectangular shape. The method of claim 2, The ceramic-glass composite charging and discharging device is a surface light source device, characterized in that formed in a three-dimensional structure that can be inserted into the hole. The method of claim 3, The three-dimensional structure is a surface light source device, characterized in that the structure of the cube is formed in the lower jaw for coupling with the lower plate. The method of claim 4, wherein The inside of the ceramic-glass composite charging and discharging device is a surface light source device, characterized in that the space is provided with a dielectric. The method of claim 1, The surface light source device further comprises a side ceramic-glass composite charge-discharge device provided on the side of the lower plate to cause a discharge against the ceramic-glass composite charge-discharge device. The method of claim 6, The side ceramic-glass composite charging and discharging device is a surface light source device, characterized in that the L-shape. delete delete The method of claim 1, The ceramic-glass composite charging and discharging device is a surface light source device, characterized in that the dielectric loss within 0.25%. delete The method of claim 1, The CaO is a surface light source device, characterized in that 0≤CaO≤1mol. The method of claim 12, The MgO is a surface light source device, characterized in that 0≤MgO≤1mol. The method of claim 13, The SrO is a surface light source device, characterized in that 0≤SrO≤1mol. The method of claim 14, The CaO + MgO + SrO = 1mol is a surface light source device. The method of claim 1, Surface light source device of the ZrO ₂ is characterized in that the 0≤ZrO ₂ ≤1mol. The method of claim 16, The TiO ₂ is a surface light source device, characterized in that 0≤TiO ₂ ≤1mol. The method of claim 17, The surface light source device characterized in that the ZrO ₂ + TiO ₂ = 1 mol. The method of claim 1, The ceramic-glass composite charging and discharging device is a surface light source device, characterized in that the composition is added with an additive containing at least one of MnO, Al ₂ O ₃ , Cr ₂ O ₃ , Fe ₂ O ₃ . The method of claim 19, The additive is a surface light source device, characterized in that added to satisfy the condition of 0≤ additive ≤ 3wt% based on the composition. The method of claim 1, The glass frit comprises a surface light source device comprising SiO ₂ , BaO, CaO. The method of claim 21, The glass frit is SiO ₂ A surface light source device comprising 1 mol, BaO 0.6 mol, CaO 0.4 mol. The method of claim 1, The glass frit is a surface light source device characterized in that the lead-free glass component is synthesized at 1100 ℃ and added to the rollability of 0.3wt% or more and 10wt% or less.

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