KR101487104B1 - Areal light source device - Google Patents

Abstract

The present invention relates to a surface light source device capable of reducing maintenance costs. The present invention includes lamp modules which emit light when electrons are emitted by an electric field. Each lamp module includes a first and a second transparent substrate which are separated from each other, a cathode prepared on the first transparent substrate, an emitter prepared on the cathode, a gate prepared to be separated from an electric field discharging member, a fluorescent layer prepared in the lower part of the second transparent substrate, and an anode prepared in the lower part of the fluorescent layer.

Description

[0001] The present invention relates to a surface light source device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar light source device, and more particularly, to a planar light source device that emits light by a field emission system having improved electron emission characteristics, thereby improving luminous efficiency and color reproducibility, and reducing maintenance cost and manufacturing cost.

As a light source for backlight of a liquid crystal display device, a cold cathode fluorescent lamp (CCFL) having a rod shape or a light emitting diode (LED) having a dot shape can be used, A surface light source device of the present invention has been proposed.

Particularly, the conventional surface light source device is attached to the liquid crystal display device and is installed substantially perpendicular to the bottom surface. In this case, since the heat generated in the discharge channel tends to be concentrated on the upper side, There is a problem that characteristics are deteriorated and a luminance unbalance occurs.

As another conventional technique of the present invention, Korean Patent Laid-Open Publication No. 10-2003-0072236 discloses a surface light source device using LEDs. That is, in the conventional art, a planar light source upper plate and a lower plate, which have a planar structure by regularly arranging LEDs that emit light, A light output portion through which the LED light is emitted; And a reflector that reflects the LED light in a structure in which the planar light source upper plate spreads inward along the light output portion.

However, since the LED emits a monochromatic light having a narrow spectrum, the color rendering property is deteriorated and the implementation of the color characteristic is limited compared with the natural light or the conventional illumination. In addition, when the temperature rises, the allowable current and the light output decrease, The characteristics are changed very sensitively to the operation temperature change, and the heat treatment device and the driving device for controlling the current are required in order to solve this problem, which is expensive. In addition, since the LED has to generate a heat sink by separately manufacturing a heat sink due to a heat generation problem, there is a problem that the manufacturing cost is increased. Even if a heat sink is provided, the light efficiency is lowered as the time elapses due to heat generated in the heat sink, It does not last.

On the other hand, a field emission device is a device that emits electrons from an emitter by forming a strong electric field around an emitter formed on a cathode electrode. As an emitter for emitting electrons from such a field emission device, a micro tip made of a metal such as molybdenum (Mo) has been used. Recently, carbon nanotubes (CNTs) having excellent electron emission characteristics have been mainly used. A carbon nanotube is a carbon allotrope, a carbon atom bonded to another carbon atom with a hexagonal honeycomb pattern to form a tube shape. Due to its excellent electrical and structural characteristics, it is applied in various electric and electronic fields have. Particularly, a field emission device using a carbon nanotube emitter is advantageous in that it is low in cost, has a low driving voltage, and has excellent chemical and mechanical stability.

Therefore, it is required to develop a new type of surface light source device that can replace the conventional surface light source device by using such a field emission device.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a surface light source device having excellent light emitting efficiency and color reproducibility as well as low cost of heat dissipation, manufacture, installation and maintenance It has its purpose.

According to an aspect of the present invention, there is provided a surface light source device including a plurality of lamp modules emitting electrons by an electric field to emit light, wherein each of the lamp modules includes (1) first and second transparent (2) a cathode provided on the first transparent substrate, (3) an emitter provided on the cathode, (4) a gate provided so as to be spaced apart from the emitter, (5) And (6) an anode provided below the fluorescent layer.

Specifically, the surface light source device according to the first embodiment of the present invention includes (1) a first light source part having a plurality of lamp modules, (2) a first light guide plate provided on the first light source part desirable.

(2) a second light source unit having a plurality of the lamp modules and provided on one side of the first light guide plate, (3) a second light source unit provided on one side of the first light guide plate, And a third light source unit having a plurality of the lamp modules and provided on the other side of the first light guide plate. In this case, the second light source unit and the third light source unit may each include one lamp module formed along a side surface of the first light guide plate.

In addition, the surface light source device according to the third embodiment of the present invention includes (1) a first light guide plate, (2) a fourth light source portion including a plurality of the lamp modules so as to surround the side surface of the first light guide plate desirable.

In particular, in the surface light source device according to the first to third embodiments of the present invention, each of the lamp modules is disposed such that the second transparent substrate faces the first light guide plate, and the first transparent substrate is a light- It is preferable to be replaced with a reflective substrate.

The surface light source device according to the fourth embodiment of the present invention may include (1) a first light guide plate, (2) a second light guide plate formed along a side surface of the first light guide plate, 3) a third light guide plate formed along a side surface of the first light guide plate and provided on the other side of the first light guide plate, 4) a fifth light source part including the lamp module which emits light toward the longitudinal direction of the second light guide plate, (5) a sixth light source unit having the lamp module which emits light toward the longitudinal direction of the third light guide plate.

At this time, it is preferable that the lamp module of the fifth light source unit is disposed such that the second transparent substrate faces the second light guide plate, and the first transparent substrate is replaced with a light shielding substrate or a reflective substrate. It is preferable that the lamp module of the sixth light source unit is disposed such that the second transparent substrate faces the third light guide plate, and the first transparent substrate is replaced with a light shielding substrate or a reflective substrate.

In addition, the surface light source device according to the second through fourth embodiments of the present invention may further include a reflector provided under the first light guide plate.

In addition, the surface light source device according to the first to fourth embodiments of the present invention may further include a diffusion member provided on the first light guide plate.

Each lamp module of the surface light source device according to the first to fourth embodiments of the present invention includes (1) a field emission substrate provided under the emitter, (2) And further comprising a metallic first carrier layer, wherein the cathode is disposed below the first carrier layer.

At this time, the first carrier layer is preferably thermally adhered to the field emission substrate.

It is preferable that the first carrier layer is made of at least one metal selected from the group consisting of gold, silver, copper, tin, aluminum, nickel, zinc, platinum, molybdenum and titanium or an alloy of these metals Do.

In addition, each of the lamp modules of the surface light source device according to the first to fourth embodiments of the present invention includes a first concave-convex portion formed with concavities and convexities on a lower portion thereof, And may further comprise a carrier layer. At this time, the cathode has a second concavo-convex portion having an opposite concavo-convex portion corresponding to the first concavo-convex portion of the second carrier layer formed on the upper portion thereof, and the second concavo-convex portion is concavo-convex coupled to the first concavo-convex portion of the second carrier layer .

Each of the lamp modules of the surface light source device according to the first to fourth embodiments of the present invention includes (1) a field emission substrate provided under the emitter, (2) a third concave- And a metallic third carrier layer provided below the field emission substrate. At this time, the cathode has a fourth concave-convex portion formed on the upper portion and having opposite concave-convex portions corresponding to the third concave-convex portion of the third carrier layer, and the fourth concave-convex portion is convex- .

In addition, in the surface light source device according to the first to fourth embodiments of the present invention, the gate may be formed in a mesh structure having a plurality of opening grooves. At this time, it is preferable that the opening groove of the gate is located on the emitter.

The surface light source device according to the present invention configured as described above can increase the energy efficiency by reducing heat generation and power consumption by configuring the surface light source using the lamp module of the field emission member having improved electron emission characteristics, It is possible to solve the problems of reduction in light efficiency and shortening the lifetime, and it is possible not only to improve the color reproducibility, but also to reduce the manufacturing cost by making it possible to manufacture without a separate heat sink and to reduce environmental pollution have.

In addition, the surface light source device according to the present invention maintains adhesion between the cathode and the field emission substrate uniformly, reduces the resistance of the entire field emission member, and accordingly improves the electron emission characteristic of the lamp module. Improvement.

In addition, the surface light source device according to the present invention is configured such that the lamp module can be separated, so that when the lamp module reaches the end of its life, only the lamp module can be replaced, and the illumination device can be maintained at a low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a lamp module according to an embodiment of the present invention; FIG.
Figs. 2 to 4 are diagrams showing configurations added to the emitters of the lamp module of the present invention to improve electron emission characteristics. Fig.
5 (a) and 5 (b) are views showing a configuration of a surface light source device according to a first embodiment of the present invention.
6 is an enlarged view of one side of the surface light source device according to the first embodiment of the present invention;
7 (a) and 7 (b) are views showing a configuration of a surface light source device according to a second embodiment of the present invention.
8 and 9 are enlarged plan views of the first light guide plate, the second light source, and the third light source of the surface light source device according to the second embodiment of the present invention.
10 (a) and 10 (b) are diagrams showing a configuration of a surface light source device according to a third embodiment of the present invention.
11 is an enlarged view of planes of the first light guide plate and the fourth light source unit of the surface light source device according to the third embodiment of the present invention.
12 is a view showing a configuration of a surface light source device according to a fourth embodiment of the present invention;
13 is an enlarged view of planes of the first light guide plate, the second light guide plate, and the fifth light source unit of the surface light source device according to the fourth embodiment of the present invention.
14 is an enlarged view of planes of the first light guide plate, the third light guide plate, and the sixth light source unit of the surface light source device according to the fourth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, . In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Furthermore, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the present invention. In this specification, the singular forms include plural forms as the case may be, unless the context clearly indicates otherwise. &Quot; comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements other than the stated element. Unless defined otherwise, all terms used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The surface light source device according to an embodiment of the present invention includes a plurality of lamp modules (hereinafter referred to as " cold cathode fluorescent lamps ") that emit light by field emission called cold cathode emission, 100).

1 is a configuration diagram of a lamp module 100 according to an embodiment of the present invention.

1, the lamp module 100 according to an exemplary embodiment of the present invention includes a first transparent substrate 10 and a second transparent substrate 20 spaced apart from each other, A cathode 30 provided on the substrate 10, an emitter 40 provided on the cathode 30, a gate 50 spaced apart from the emitter 40, A spacer 60 provided between the first transparent substrate 20 and the second transparent substrate 20 and a fluorescent layer 70 provided below the second transparent substrate 20 and an anode 80).

Further, the fluorescent layer 70 and the anode 80 may be arranged so that their positions are changed from each other. That is, an anode 80 may be provided under the second transparent substrate 20, and a fluorescent layer 70 may be provided under the anode 80.

The specific light emission principle of the lamp module 100 is as follows. That is, when a voltage is supplied to the cathode 30, the gate 50 and the anode 80, electrons are emitted from the emitter 40 and the emitted electrons are transmitted to the anode 80, And the fluorescent layer 70 provided on the phosphor layer 70.

The first transparent substrate 10 and the second transparent substrate 20 are transparent substrates spaced apart from each other and transmit light generated as electrons strike the fluorescent layer 70 to the outside. For example, the first transparent substrate 10 and the second transparent substrate 20 may be selected from the group consisting of a polymer substrate, a glass substrate, a quartz substrate, and a sapphire substrate.

The material of the first transparent substrate 10 and the second transparent substrate is not particularly limited, but examples thereof include polyethylene terephthalate (PET), polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene (PEN), polyether sulfone (PES), cyclic olefin polymer (COC), TAC (triacetylcellulose) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, polystyrene , PS), biaxially oriented PS (biphenyl-containing oriented PS), polypropylene (PP), triacetyl cellulose (TAC), and the like.

When the lamp module 100 emits light in one direction, any one of the first transparent substrate 10 and the second transparent substrate 20 may be a light-shielding substrate blocking light, It is preferable that the first transparent substrate 10 is replaced with a light-shielding substrate or a reflective substrate.

The cathode 30 and the anode 80 may be formed of a metal such as Al, Au, Ni, Ti, or Cr, an indium tin oxide (ITO), an indium zinc oxide (IZO) zinc oxide, and transparent conductive oxide (TCO) such as indium zinc tin oxide (IZTO), conductive polymer, and graphene.

The emitter 40 is configured to emit electrons supplied from the cathode 30 toward the anode 80. A plurality of emitters 40 are formed on the cathode 30 in the horizontal and vertical directions It is preferable that they are arranged at regular intervals. The emitter 40 may be formed of a carbon nanotube (CNT), a carbon nanofiber, a semiconductor nanowire, a conductive nanorod, a graphite, etc., and may be formed in various shapes such as a horn shape, a triangle, .

Particularly, in the embodiment of the present invention, emitter 40 made of carbon nanotubes is used, so that high-efficiency field emission characteristic peculiar to carbon nanotubes can be obtained. The carbon nanotube emitter 40 may be formed by a method such as laser vaporization, arc discharge, thermal-CVD, plasma-CVD, HF-CVD In order to improve the electron emission characteristics, the carbon nanotube emitter manufacturing process disclosed in the applicants' patent registration Nos. 10-0920296, 10-0916458 and 10-0926219 can be used have.

As shown in FIG. 1, the gate 50 has a mesh structure having a plurality of opening grooves 51. The gate structure 50 has a structure in which the gate 50 adjusts the flow of electrons emitted from the emitter 40 according to an input voltage. . At this time, each of the emitters 40 is preferably located on the opening groove 51. Accordingly, the gate 50 diffuses the electrons emitted from the emitter 40, thereby uniformly bombarding the fluorescent layer 70, thereby emitting light uniformly. The gate 50 is preferably formed of a conductive material. The gate 50 is formed of a metal such as Au, Ni, Ti, Cr, Sus, Fe, or Mo, an indium tin oxide (ITO), an indium zinc oxide (IZO), an aluminum zinc oxide (AZO) zinc tin oxide (TCO), conductive polymer, graphene, or the like.

The spacer 60 maintains the spacing between the first transparent substrate 10 and the second transparent substrate 20 and between the cathode 30 and the anode 80. The spacers 60 are formed on the first transparent substrate 10 and the second transparent substrate 20, And serves as a side portion of the lamp module which seals the periphery of the lamp module 20 to form an internal space. That is, the spacer 60 is provided around the cathode 30, the emitter 40 and the gate 250 at the top of the first transparent substrate 10 and the bottom of the second transparent substrate 20, .

The spacer 60 may be formed of a transparent material so that light emitted from the spacer 60 can be transmitted to the outside. For example, the spacer 60 may be selected from the group consisting of a polymer, a glass substrate, quartz, and sapphire. Also, the spacer 60 may be formed of a light-shielding material for blocking light or a reflective material for reflecting light.

The fluorescent layer 70 is a layer formed of a fluorescent material, and generates light by collision with electrons emitted from the emitter 40.

The fluorescent layer 70 may be formed of a fluorescent material well known in the art. The fluorescent material is a material that converts various excitation energies of electrons and emits them as visible light. The fluorescent material may be prepared by synthesizing a suitable activator ion and a maternal material in order to obtain a desired emission wavelength, but the present invention is not limited thereto. The excitation energy transferred through the matrix of fluorescent material is converted from visible light to visible light and emits light. At this time, the emission wavelength is determined by a combination of a given host and a dopant activated in the host, and each fluorescent material has a specific emission wavelength. For example, the fluorescent layer 70 may include a red fluorescent layer, a green fluorescent layer, and a blue fluorescent layer by applying red, green, and blue fluorescent materials in various shapes, respectively, and by combining them, have.

1, the lamp module 100 according to an embodiment of the present invention includes a first electrode 90, a second electrode 91, and a third electrode 92 formed to supply power from the outside, It is preferable to further include an electrode 92. That is, the first electrode 90 is connected to the cathode 30, the second electrode 91 is connected to the gate 50, the third electrode 92 is connected to the anode 80, . Accordingly, power is input to the cathode 30, the gate 50, and the anode 80 through the first electrode 90, the second electrode 91, and the third electrode 92, The electrons are finally emitted through the emitter 40 and the lamp module 100 emits light.

1, the first electrode 90 protrudes from the lower center of the first transparent substrate 10 and penetrates the first transparent substrate 10 to form the cathode 30 ). 1, the second electrode 91 protrudes from one side of the lower part of the first transparent substrate 10 and is connected to the gate 50 through the first transparent substrate 10, . 1, the third electrode 92 protrudes from one side of the upper surface of the second transparent substrate 20 and penetrates the second transparent substrate 20 to form the anode 80, .

The third electrode 92 may protrude from the lower side of the first transparent substrate 10 and may be connected to the anode 80 through the first transparent substrate 10.

The first electrode 90, the second electrode 91, and the third electrode 92 may be formed of a conductive material so as to have a rod shape. That is, the first electrode 90, the second electrode 91 and the third electrode 92 may be formed of a metal such as Au, Ni, Ti, Cr, Covar, Invar, Mo, indium tin oxide (ITO) a transparent conductive oxide (TCO) such as indium zinc oxide (ITO), aluminum zinc oxide (AZO), and indium zinc tin oxide (IZTO), a conductive polymer, and a graphene.

Hereinafter, the structure added to the emitters 40 for improving the electron emission characteristics of the emitters 40 will be described.

First, the emitter 40 is preferably formed on the field emission substrate 41 as shown in FIG. The field emission substrate 41 is a typical wafer provided with an emitter in the field emission device. That is, the field emission substrate 41 is mounted on the cathode 30 to mount the emitter 40.

The electron emission characteristic of the emitter 40 formed on the field emission substrate 41 is greatly affected by the contact resistance between the cathode 30 and the field emission substrate 41. [ If the contact between the cathode 30 and the field emission substrate 41 is not uniform, the electron emission characteristic is greatly lowered due to an increase in contact resistance. Particularly, if the cathode 30 and the field emission substrate 41 are bonded together using an adhesive agent, it is possible to prevent short-circuiting due to gas outgassing, deterioration of adhesive properties due to heat during the vacuum bonding process, arcing may occur.

That is, it is necessary to improve the electron emission characteristics by uniformly stably bonding the cathode 30 and the field emission substrate 41 while reducing the adhesive resistance.

Figs. 2 to 4 show configurations added to the emitters 40 to improve electron emission characteristics.

As shown in FIG. 2, the lamp module 100 according to the present invention is a first embodiment for improving the electron emission characteristics. The lamp module 100 includes a first metallic carrier layer (42).

The first carrier layer 42 is preferably a metal layer, and is preferably adhered to the field emission substrate 41 through a heat bonding process so that the first carrier layer 42 can be uniformly and stably bonded and reduced in adhesion resistance. Specifically, the first carrier layer 42 may be formed of any one selected from the group consisting of gold, silver, copper, tin, aluminum, nickel, zinc, platinum, molybdenum, titanium, .

In addition, as a second embodiment for improving the electron emission characteristic, the lamp module 100 according to the present invention includes, in addition to the first carrier layer 42, And a metallic second carrier layer 43 provided on the lower portion of the first carrier layer 42. The first carrier layer 42 may be formed of a metal.

According to the second embodiment, the cathode 30 has a second concave-convex portion 31 formed on its upper portion and having opposite concaves and convexes corresponding to the first concave-convex portions 43a of the second carrier layer 43 , The second concavo-convex portion 31 is concavo-convexly coupled to the first concavo-convex portion 43a of the second carrier layer 43. [

The second carrier layer 43 is preferably a metal layer which is adhered to the first carrier layer 42 through a heat bonding process but may be adhered to the first carrier layer 42 using an intermediate material 44. [ It is possible. Specifically, the second carrier layer 43 may be at least one of metals selected from the group consisting of gold, silver, copper, tin, aluminum, nickel, zinc, platinum, molybdenum, titanium, And most preferably composed of aluminum, Sus, and Covar.

The intermediate member 44 is a metal adhesive of a conductive material for laminating the first carrier layer 42 and the second carrier layer 43, and known adhesives, elastomers and resins may be used. For example, the intermediate member 44 may be, but is not limited to, a cyanoacrylate adhesive, an epoxy adhesive, an acrylic adhesive, a polyurethane adhesive, a nylon resin, and a thermosetting resin.

In particular, it is preferable that the concavo-convex coupling is a form in which the second carrier layer 43 and the cathode 30 can be separated and recombined. That is, the concavities and convexities formed on the second carrier layer 43 are formed in the form of a thread or a pin. Accordingly, the lamp module 100 according to the present invention can be replaced when the life of the emitter 40 is short, which is cost-effective. When the second carrier layer 43 is coupled to the cathode 30, it is preferable to use a heat bonding method, a bolt-nut coupling method, or a pin fixing method.

In addition, as a third embodiment for improving the electron emission characteristic, the lamp module 100 according to the present invention includes a third concave-convex portion 45a having a concave-convex portion formed at the bottom thereof as shown in FIG. 4 And a metallic third carrier layer 45 provided below the field emission substrate 41. [0041] As shown in FIG.

According to the third embodiment, the cathode 30 includes a fourth concavo-convex portion 32 having an opposite concavo-convex corresponding to the third concavo-convex portion 45a of the third carrier layer 45 at an upper portion thereof, And the fourth concavo-convex portion 32 is concavo-convex coupled to the third concavo-convex portion 45a of the third carrier layer 45. [

It is preferable that the third carrier layer 45 is a metal layer and is adhered to the field emission substrate 41 through a heat bonding process so that the third carrier layer 45 can be uniformly and stably bonded and reduced in adhesion resistance. Specifically, the third carrier layer 45 may be at least one of metals selected from the group consisting of gold, silver, copper, tin, aluminum, nickel, zinc, platinum, molybdenum, titanium, And most preferably composed of aluminum, Sus, and Covar.

Particularly, it is preferable that the concave-convex coupling is a form in which the third carrier layer 45 and the cathode 30 can be separated and recombined. That is, the concavities and convexities formed on the third carrier layer 45 are formed in a thread or pin shape. Accordingly, the lamp module 100 according to the present invention can be replaced when the life of the emitter 40 is short, which is cost-effective. When the third carrier layer 45 is coupled to the cathode 30, it is preferable to use a heat bonding method, a bolt-nut coupling method, or a pin fixing method.

The first carrier layer 42, the second carrier layer 43 and the third carrier layer 45 described above maintain uniform adhesion between the cathode 30 and the field emission substrate 41, (30) and the emitter (40). Accordingly, the lamp module 100 provided with these lamps has improved electron emission characteristics, improved luminous efficiency and color reproducibility, and is less costly due to less current consumption and lower power consumption.

The first concavo-convex portion 43a and the second concavo-convex portion 31, which are concavo-convex coupled to each other, and the third concavo-convex portion 45a and the fourth concavo-convex portion 32, It is possible.

Hereinafter, a specific configuration of the surface light source device having the lamp module 100 will be described.

5A and 5B are exploded views (refer to FIG. 5A) and one side view (FIG. 5B) showing the structure of the surface light source device according to the first embodiment of the present invention. 6 is an enlarged view of a side view of the surface light source device according to the first embodiment of the present invention (the wave display is omitted in the remainder of the drawing, the same applies hereinafter).

As shown in FIGS. 5A and 5B, the surface light source device according to the first embodiment of the present invention includes a first light source 200 having a plurality of lamp modules 100, A first light guide plate 300 provided on the first light guide plate 200 and a diffusion member 400 provided on the first light guide plate 300.

The first light source unit 200 is configured to supply a light source to the first light guide plate 300, and it is preferable that a plurality of the lamp modules 100 are arranged in parallel with each other. The first light source part 200 may be arranged such that a plurality of lamp modules 100 are arranged at regular intervals in the horizontal direction and the vertical direction so that a uniform light source can be supplied to the first light guide plate 300 Do.

In particular, each lamp module 100 provided in the first light source unit 200 may be configured as shown in FIG. 6 so that most of the light emitted from the first light source unit 200 can be supplied to the first light guide plate 300 As shown in the figure, the second transparent substrate 20 is disposed to face the first light guide plate 300, and the first transparent substrate 10 is replaced with a light-shielding substrate for blocking light or a reflective substrate for reflecting light . The spacer 60 of each lamp module 100 is preferably formed of a light shielding material or a reflective material reflecting light.

The first light guide plate 300 guides the light emitted from the light source and is formed as a planar light source. For example, the first light guide plate 300 may be formed of a transparent and high refractive index resin such as PMMA (polymethylmethacrylate), polycarbonate resin, methacrylic resin, etc. and has a refractive index of 1.4 to 1.6 But is not limited thereto.

The diffusion member 400 diffuses the planar light source emitted from the first light guide plate 300 to emit a more uniform planar light source. For example, the diffusion member 400 may be formed by embedding scattering particles such as topaz in a transparent material, but is not limited thereto.

7A and 7B are an exploded view (see FIG. 7A) and a side view (FIG. 7B) showing a configuration of the surface light source device according to the second embodiment of the present invention. 8 and 9 are enlarged plan views of the first light guide plate 300, the second light source unit 210, and the third light source unit 220 of the surface light source device according to the second embodiment of the present invention.

7A and 7B, the planar light source device according to the second embodiment of the present invention includes a first reflector 500, a first light guide plate 500 provided on the first reflector plate 500, A second light source part 210 provided on one side of the first light guide plate 300, a third light source part 220 provided on the other side of the first light guide plate 300, And a diffusion member 400 provided on the base plate 400.

The second light source unit 210 and the third light source unit 220 are configured to supply a light source to the first light guide plate 300. The lamp module 300, 100, respectively. The second light source unit 210 and the third light source unit 220 may include a plurality of the lamp modules 100 arranged in a row, as shown in FIG.

The second light source unit 210 and the third light source unit 220 may be configured to supply most light emitted from the second light source unit 210 and the third light source unit 220 to the first light guide plate 300, 8 and 9, a second transparent substrate 20 is disposed to face the first light guide plate 300, and the first transparent substrate 10, Shielding substrate for shielding the light or a reflective substrate for reflecting light is preferable. At this time, it is preferable that the spacer 60 of each lamp module 100 is formed of a light shielding material or a reflective material reflecting light.

The first reflection plate 500 is formed of a material reflecting light, and the planar light source formed on the first light guide plate 300 is emitted upward.

The first light guide plate 300 and the diffusion member 400 are the same as those of the planar light source device according to the first embodiment of the present invention and therefore will not be described below.

10A and 10B are an exploded view (see FIG. 10A) and a side view (FIG. 10B) showing a configuration of the surface light source device according to the third embodiment of the present invention. 11 is an enlarged view of planes of the first light guide plate 300 and the fourth light source unit 230 of the surface light source device according to the third embodiment of the present invention.

10 (a) and 10 (b), the planar light source device according to the third embodiment of the present invention includes a first reflector 500, a first reflector 500 provided on the first reflector 500, A fourth light source unit 230 having a plurality of lamp modules 100 and a diffusion member 400 provided on the first light guide plate 300 so as to surround the side surfaces of the first light guide plate 300, And the like.

The fourth light source unit 230 is configured to supply a light source to the first light guide plate 300. The plurality of lamp modules 100 are arranged so as to surround the side surfaces of the first light guide plate 300 in parallel with each other desirable. The plurality of lamp modules 100 may be arranged at regular intervals so that a more uniform light source may be supplied to the first light guide plate 300.

In particular, each lamp module 100 provided in the fourth light source unit 230 may be configured as shown in FIG. 11 so that most of the light emitted from the fourth light source unit 230 can be supplied to the first light guide plate 300 As shown in the figure, the second transparent substrate 20 is disposed to face the first light guide plate 300, and the first transparent substrate 10 is replaced with a light-shielding substrate for blocking light or a reflective substrate for reflecting light . At this time, it is preferable that the spacer 60 of each lamp module 100 is formed of a light shielding material or a reflective material reflecting light.

The first light guide plate 300, the diffusion member 400, and the first reflector 500 are the same as those of the surface light source device according to the first and second embodiments of the present invention.

12 is a view showing a configuration of a surface light source device according to a fourth embodiment of the present invention. 13 is an enlarged plan view of the first light guide plate 300, the second light guide plate 310 and the fifth light source unit 240 of the surface light source device according to the fourth embodiment of the present invention, The plan view of the first light guide plate 300, the third light guide plate 320 and the sixth light source 250 of the surface light source device according to the fourth embodiment of the present invention.

12, the surface light source device according to the fourth embodiment of the present invention includes a first reflector 500, a first light guide plate 300 provided on the first reflector 500, A second light guide plate 310 provided on one side of the first light guide plate 300 and a second light guide plate 310 extending along the side surface of the first light guide plate 300, A fifth light source unit 240 including the lamp module 100 that emits light toward the longitudinal direction of the second light guide plate 310 and a third light guide plate 320 provided on the other side of the third light guide plate 320. [ And a sixth light source unit 250 having the lamp module 100 emitting light toward the longitudinal direction.

The fifth light source unit 240 supplies the light source to the second light guide plate 310 and the sixth light source unit 250 supplies the light source to the third light guide plate 320.

The second light guide plate 310 and the third light guide plate 320 guide light sources supplied from the fifth light source unit 240 and the sixth light source unit 250 and output a small planar light source to the first light guide plate 300 . Accordingly, the first light guide plate 300 guides a small-sized planar light source emitted from the second light guide plate 310 and the third light guide plate 320 to form a planar light source of a wider width and emits the planar light. The second light guide plate 310 and the third light guide plate 320 may be formed of transparent and high refractive index resin such as PMMA (polymethylmethacrylate), polycarbonate resin, methacrylic resin, and the like, But it is not limited thereto.

In particular, as shown in FIG. 13, the surface light source device according to the fourth embodiment of the present invention is configured such that most of the light emitted from the second light guide plate 310 is supplied to the first light guide plate 300 And a second reflector 510 formed of a material reflecting light on one side of the second light guide plate 310, that is, a side surface of the second light guide plate 310 that does not contact the first light guide plate 300 . 14, the planar light source device according to the fourth embodiment of the present invention may be configured such that most of the light emitted from the third light guide plate 310 is supplied to the first light guide plate 300 And a third reflector 520 formed of a material reflecting light on one side of the third light guide plate 320, that is, a side surface of the third light guide plate 320 that does not contact the first light guide plate 300 .

13, the fifth light source unit 240 may be arranged such that the plurality of lamp modules 100 emit light in the longitudinal direction of the second light guide plate 310. As shown in FIG. 14, the sixth light source unit 250 may be arranged such that a plurality of the lamp modules 100 emit light in the longitudinal direction of the third light guide plate 320.

The plurality of lamp modules 100 (100) provided in the fifth light source unit 240 and the sixth light source unit 250 may be arranged to supply a more uniform light source to the second light guide plate 310 and the third light guide plate 320, Are preferably arranged at regular intervals.

The lamp modules 100 provided in the fifth light source unit 240 are arranged in a manner such that the lamp modules 100 provided in the fifth light source unit 240, The second transparent substrate 20 is disposed to face the second light guide plate 310 and the first transparent substrate 10 is replaced with a light shielding substrate for blocking light or a reflective substrate for reflecting light desirable. At this time, it is preferable that the spacer 60 of each lamp module 100 is formed of a light shielding material or a reflective material reflecting light.

14, each of the lamp modules 100 provided in the sixth light source unit 250 may include a plurality of light sources such that the most light emitted from the sixth light source unit 250 may be supplied to the third light guide plate 320, As shown in the figure, the second transparent substrate 20 is disposed to face the third light guide plate 320, and the first transparent substrate 10 is replaced with a light-shielding substrate for blocking light or a reflective substrate for reflecting light . At this time, it is preferable that the spacer 60 of each lamp module 100 is formed of a light shielding material or a reflective material reflecting light.

The first light guide plate 300, the diffusion member 400, and the first reflector 500 are the same as those of the surface light source device according to the first and second embodiments of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be appreciated that one embodiment is possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the claims.

10: first transparent substrate 20: second transparent substrate
30: cathode 31: second concave-convex portion
32: fourth uneven portion 40: emitter
41: field emission substrate 42: first carrier layer
43: second carrier layer 43a: first concave-
44: intermediate member 45: third carrier layer
45a: third concave / convex portion 50: gate
51: opening groove 60: spacer
70: fluorescent layer 80: anode
90: first electrode 91: second electrode
92: third electrode 100: lamp module
200: first light source part 210: second light source part
220: third light source part 230: fourth light source part
240: fifth light source unit 250: sixth light source unit
300: first light guide plate 310: second light guide plate
320: third light guide plate 400: diffusion member
500: first reflector 510: second reflector
520: Third reflector

Claims (17)

And a lamp module emitting electrons by an electric field to emit light,
The lamp module includes:
First and second transparent substrates spaced apart from each other;
A cathode provided on the first transparent substrate;
A field emission substrate having an emitter on top;
A metallic first carrier layer provided below the field emission substrate;
A metallic second carrier layer provided on a lower portion of the first carrier layer, the first carrier layer having a first concavo-convex portion having concave and convex portions formed on a lower portion thereof;
A gate spaced apart from the emitter;
A fluorescent layer provided under the second transparent substrate; And
And an anode provided below the fluorescent layer,
The cathode may further comprise:
And a second concavo-convex portion having an opposite concavo-convex portion corresponding to the first concavo-convex portion of the second carrier layer formed on an upper portion thereof, wherein the second concavo-convex portion is concavo-convexly coupled to the first concavo-convex portion of the second carrier layer Light source device. The method according to claim 1,
A first light source unit having a plurality of lamp modules;
And a first light guide plate provided on the first light source unit. The method according to claim 1,
A first light pipe;
A second light source unit having the lamp module and provided on one side of the first light guide plate;
And a third light source unit having the lamp module and provided on the other side of the first light guide plate. The method of claim 3,
Wherein the second light source unit and the third light source unit each have one lamp module formed along a side surface of the first light guide plate. The method according to claim 1,
A first light pipe;
And a fourth light source unit including a plurality of the lamp modules so as to surround the side surfaces of the first light guide plate. The method according to claim 1,
A first light pipe;
A second light guide plate formed along a side surface of the first light guide plate and provided on one side of the first light guide plate;
A third light guide plate formed along a side surface of the first light guide plate and provided on the other side of the first light guide plate;
A fifth light source unit having the lamp module that emits light toward the longitudinal direction of the second light pipe;
And a sixth light source unit having the lamp module that emits light toward the longitudinal direction of the third light guide plate. The method according to claim 6,
The lamp module of the fifth light source unit includes:
The second transparent substrate is disposed to face the second light guide plate, the first transparent substrate is replaced with a light shielding substrate or a reflective substrate,
The lamp module of the sixth light source unit includes:
Wherein the second transparent substrate is disposed to face the third light guide plate, and the first transparent substrate is replaced with a light shielding substrate or a reflective substrate. 6. The method according to any one of claims 2 to 5,
Each of the lamp modules includes:
Wherein the second transparent substrate is disposed to face the first light guide plate, and the first transparent substrate is replaced with a light shielding substrate or a reflective substrate. 8. The method according to any one of claims 3 to 7,
And a reflective plate provided below the first light guide plate. 8. The method according to any one of claims 2 to 7,
And a diffusion member provided on the first light guide plate. delete The method according to claim 1,
Wherein the first carrier layer is thermally adhered to the field emission substrate. The method according to claim 1,
Wherein the first carrier layer is made of at least one of metals selected from the group consisting of gold, silver, copper, tin, aluminum, nickel, zinc, platinum, molybdenum, titanium, Light source device. delete delete 8. The method according to any one of claims 1 to 7,
Wherein the gate is formed in a mesh structure having a plurality of opening grooves. 17. The method of claim 16,
And the opening groove of the gate is located on the emitter.

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