KR101106502B1 - The backlight unit - Google Patents

Abstract

The present invention relates to a light guide plate that is simple in structure by optical patterns or nanoparticles, and scatters incident light into a uniform brightness and a large area, thereby converting it into a surface light source and emitting light evenly without loss. A body portion formed of one or more shapes selected from a relief and an embossment and having at least one groove into which light sources are inserted at both ends, and a reflection part attached to a lower surface of the body part and reflecting light and attached to an upper surface of the body part. The injection molding of the main body of the light guide plate is characterized by the scattering part to be scattered, thereby reducing the production time and simplifying the manufacturing process, thereby facilitating mass production, and eliminating the luminance attenuation at the interface by reducing the number of components. It improves the brightness of the display device by improving the brightness and transmits the light to every corner by the optical pattern. Because of high scattering, there is no partial contrast difference in the surface light source, which improves the quality of the displayed information. It works.

Description

Light guide plate {The backlight unit}

According to the present invention, since light incident from the side surface of the light guide plate is scattered evenly in every corner, the light is converted into a wide surface light source and is emitted. The present invention relates to a light guide plate that scatters luminance and a large area so as to be converted into a surface light source and is emitted evenly without loss.

Devices that display visual information include a CRT (Cathod Ray Tube) display that controls the entire screen and emits light in an analog manner, and digitally controls each pixel and does not emit light. Liquid crystal display (LCD) displays.

In general, the display device has a large display area, is light in weight to increase mobility, and thin in thickness because it requires a small size in order to increase portability.

LCD displays have tended to replace all CRT displays due to their excellent image quality, light weight, thinness, and low power consumption. In particular, LCD displays have been adopted in devices requiring mobility and portability, such as notebook computers and mobile phones.

However, since the LCD display is non-luminescent, visual information cannot be displayed by itself, and an external light source must be separately provided. Due to this need, a backlight unit apparatus for supplying a surface light source of uniform luminance has been developed.

The backlight unit includes a light source, a light guide plate, a reflector, and the like, and is classified into an edge type and a direct type by a method of arranging the light sources.

The edge type backlight unit device has a relatively thin structural feature because the light source is disposed on the side of the light guide plate, and is mainly used in equipment requiring small size, light weight, and thinness, such as portable equipment.

Since the direct type backlight device has a light source disposed on the bottom of the light guide plate, the light source is relatively thick, but the light efficiency is excellent, thereby improving the quality of the displayed information.

Hereinafter, a light guide plate using an edge type backlight unit device will be described.
1 is a functional diagram of a conventional edge type light guide plate.
Hereinafter, with reference to the accompanying drawings, the edge type light guide plate 10 is inserted into the main body 20, the groove formed on one side of the main body 30, the light source 30 to generate white light on the side of the main body, the main body Dots 40 are formed on the bottom (bottom) and scatter the light by diffuse reflection, the reflecting plate 50 is attached to the lower surface of the main body to reflect the light, the diffusion plate attached to the upper surface of the main body to diffuse the light It is a structure containing 60.
The main body 20 generally uses a polymethyl methacrylate acrylic resin (PMMA: Poly-Methyl-Methacrylate) having excellent transparency, good weatherability, high hardness, and excellent moldability and surface gloss.
These PMMAs are resistant to water and weak acids, invasive to alkalinity, soluble in organic solvents, weak to impact and deformable at 100 degrees Celsius.
The light source 30 inserted into at least one hole formed at both ends of the main body 20 is a point light source or a linear light source, and enters light toward the edge of the main body 20, and the main body has a total reflection of the incident light. Scatter while repeating the refraction.
At this time, the plurality of dots 40 are diffusely reflected by the irregular surface, so that scattering is promoted, such total reflection and diffuse reflection is repeatedly converted to the surface light source and emitted to the upper and lower surfaces, respectively.
Here, the dot 40 is processed in a scraping manner using a mold or a jig, and thus, as shown in the drawing, the processed surface is unevenly irregular and takes a relatively long time.
The reflection plate 50 prevents the surface light source from exiting to the lower surface, so that the surface light source exits to the upper surface of the main body 20.
The diffusion plate 60 scatters the light of the surface light source emitted from the main body 20 to a wider range.
At this time, the light scattered on the diffuser plate 60 may be provided to collect in a predetermined direction to provide a prism plate for increasing the brightness. The prism plate consists of a vertical prism plate 70 and a horizontal prism plate 80.
The protective sheet 90 may be further provided on the prism plates 70 and 80 to protect against external force.
Since the vertical and horizontal prism plates 70 and 80 are scattered to collect directional light to form directionality, the prism plates 70 and 80 proceed in a required direction, and the protective sheet 90 is applied to a predetermined physical and chemical from outside. Blocks because it absorbs and withstands shocks.
However, since the edge light guide plate forms a plurality of dots 40 on the lower surface of the main body by V cutting or mold processing, the manufacturing process is complicated and a lot of production time is required.
In addition, a plurality of media are provided on the upper surface of the main body 20, such as a diffusion plate 60, a vertical prism plate 70, a horizontal prism plate 80, a protective sheet 90, and the like, while each medium passes through light. Attenuate the brightness by about 4%.

The light guide plate according to the prior art has a relatively small area of a point light source or a line light source incident from a light source disposed on a side surface of the light guide plate, where the main body of the light guide plate is incident and scattered therein, thereby converting the light into a surface light source.

In particular, the brightness is uneven in the state of being converted into a surface light source, and the contrast is partially caused. Since the effective area is small, it is difficult to increase the width of the effective screen on which information is displayed and at the same time, it requires a lot of weight and a large manufacturing cost. It became.

After converting the light guide plate into a surface light source, there is no partial contrast difference, and in order to widen the effective area of the surface light source, light should be well scattered inside the body. It should be done smoothly and the luminance should not be unnecessarily attenuated in the light emission path.

In the prior art, polymethyl methacrylate acrylic resin (PMMA: Poly-Methyl-Methacrylate) was used as a material of the light guide plate body, and in order to make light scattering well, grooves are formed on the lower surface of the body by V-cutting. A diffuser plate, horizontal and vertical prism plates, and the like are attached to the upper surface of the light guide plate body so that the scattered light is uniformly emitted to the surface light source.

However, such a prior art has a problem that the time and cost for V-cutting are high and defects increase.

On the other hand, the manufacturing process for attaching the diffusion plate, the prism plate, etc. to the upper surface of the light guide plate main body is complicated, the production time is long, the cost increases.

In addition, there is a problem that it is difficult to broaden the area of the surface light source scattered and diffused by the luminance of light continuously at the interface that separates the materials, such as the main body, the diffusion plate, and the prism plate of the light guide plate.

Therefore, there is a need to develop a technology that simplifies the manufacturing process of the edge type light guide plate, reduces the production time, and improves the quality of the displayed information because there is no difference in contrast.

In particular, there is a need to develop a technique for simplifying the overall configuration of the edge type light guide plate and preventing the luminance of the surface light source from being unnecessarily attenuated in the process of outputting.

The present invention is to solve the problems and necessity of the prior art as described above is to provide a light guide plate to reduce the manufacturing and production time of the edge-type light guide plate and to simplify the process to lower the cost.

On the other hand, it is an object of the present invention to provide a light guide plate that allows light incident on an edge type light guide plate to be scattered widely by optical patterns or nanoparticles.

It is also an object of the present invention to provide a light guide plate which simplifies the entire structure of an edge type light guide plate and prevents the luminance of the surface light source emitted by a small number of parts from being unnecessarily attenuated at the interface.

The present invention devised to achieve the above object is a main body portion having at least one groove formed by molding any one of the intaglio and embossed with an optical pattern on the lower surface and having a light source inserted into both ends, respectively, A light guide plate including a reflection part attached to a lower surface and reflecting light and a scattering part attached to an upper surface of the body part to scatter light is provided.

Preferably, the optical pattern is made of at least one selected from a Fresnel pattern, a radiation pattern, and a scattering pattern.

The scattering pattern may include at least one selected from a vertical pattern, a horizontal pattern, an oblique pattern, a wave pattern, and a checkerboard pattern.

On the other hand, the optical pattern is made of any one or more selected from a discontinuous dot shape and a continuous columnar shape.

In addition, the dot shape is a cylindrical shape and has a shape of any one selected from polygons including a circular bottom surface and is made of a horn shape.

And the columnar shape is any shape selected from polygons whose cutting surface contains a circle, and consists of a rod shape.

On the other hand, the main body portion is composed of injection molding by injecting silicon into the injection mold formed with the optical pattern.

In addition, the reflector is made of any one selected from an optical pattern formed and an aluminum thin plate not formed.

The reflector for forming the optical pattern is formed by compression molding an aluminum thin plate with a compression mold having an optical pattern formed thereon.

On the other hand, the optical pattern is composed of a configuration that varies the base angle of each shape according to the position of the pattern.

In addition, the optical pattern is formed by molding at least one selected from the shape of an embossed dot, an intaglio dot, an embossed pillar, and an intaglio pillar on each pattern.

The scattering portion is configured to contain a phosphor that generates white corresponding to the light source.

In order to achieve the above object, the present invention includes a main body portion and a main body portion including one or more nanoparticles containing at least one nanoparticle selected from silver, aluminum, and hollow silica microspheres and having light sources inserted into both ends thereof. Provided is a light guide plate including a reflector attached to a lower surface to reflect light.

Preferably, the main body portion is composed of injection molding by injecting silicon mixed with the selected nanoparticles into a mold.

On the other hand, the body portion is made of a configuration for molding any shape selected from the intaglio and embossed with an optical pattern on the lower surface.

The reflector is made of any one selected from a molded optical pattern and an unmolded aluminum sheet.

The present invention having the above-described configuration has an industrial use effect of facilitating mass production by reducing the production time, simplifying the manufacturing process, and reducing the defective rate since injection molding the main body of the edge type light guide plate using the injection mold.

In addition, since the present invention having the above-described configuration uses a mold, there is a convenient effect in use for accurately forming optical patterns of various patterns.

On the other hand, the present invention has the industrial use effect of improving the quality of the displayed information because the light incident on the side is transmitted and scattered by the optical pattern every corner and scattered in the corner light source does not occur.

In addition, the present invention having the configuration described above has a convenient effect in reducing the total number of components of the edge type light guide plate to eliminate the luminance attenuation at the interface and improve the brightness of the surface light source emitted.

On the other hand, the present invention of the above configuration is that the incident light is uniformly and evenly scattered in every direction, and converted to a wide surface light source, and as a result, the effective area for displaying information on the display device is reduced while reducing the weight There is an industrial use effect.

1 is a functional diagram of a conventional edge light guide plate;
2 is a cross-sectional view for explaining the function of the edge type light guide plate according to the first embodiment of the present invention;
3 is a plan view for explaining the configuration of the main body according to the first embodiment of the present invention;
4 is a diagram illustrating a pattern of an optical pattern including a scattering pattern, a radiation pattern, and a Fresnel pattern according to an embodiment of the present invention;
5 is an explanatory view illustrating an enlarged portion of the lower surface of the injection mold in which the Fresnel pattern A portion of FIG. 4 is embossed according to an embodiment of the present invention;
FIG. 6 is a view for explaining a pattern of an optical pattern formed on a bottom surface of an injection mold for injection molding a body part according to one embodiment of the present invention;
And
7 is a cross-sectional view illustrating a function of an edge type light guide plate according to a second embodiment of the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Detailed descriptions and drawings of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

A device for displaying visual information may be classified into a light emitting display device that emits itself, such as a CRT, and a non-light emitting display device that does not emit itself, such as an LCD, and uses external light.

Non-luminescent display requires a backlight unit that supplies light from the outside, and the backlight unit supplies the surface light source by supplying light from the entire edge and the edge type that supplies light from the side to the surface light source. Can be divided into direct types.

An effective area (effective screen) is a portion in which a surface light source is generated with an effective luminance capable of displaying and identifying information in a backlight device.

When light passes through a transparent medium and the medium, the light passes through at least one of reflection, incidence, refraction and emission at the interface of the medium. As such, it is known that the luminance of light at the interface or interface between the medium and the medium generally decreases by about 4%.

Phosphors or phosphors are phosphors generated by absorbing ultraviolet energy, converting them into visible light energy with a low level of energy and a slightly longer wavelength, and are commonly referred to as 'phosphos' in the industry. It will be described as.

In general, a method of implementing a white light source using a light emitting diode (LED) includes a method of simultaneously using light emitting diodes of red (R), green (G), and blue (B) colors, which are three primary colors of light, and a blue light source. There is a method of implementing a white light source by applying a fluorescent material emitting yellow light to the light emitting diode.

In addition, there is a method of implementing a white light source by applying a fluorescent material generating a color of red (R), green (G), blue (B) to a light emitting diode that generates near ultraviolet rays.

Patterns are used in the sense of patterns or styles that repeat regularly or irregularly.

Fresnel is a French physicist who has found that when a series of lenses are arranged consistently along multiple concentric circles, they can function as large lenses compared to the thickness of individual lenses.

That is, when the surface of the lens is divided into concentric ring pieces, the large lens can be made relatively flat and thin, thereby significantly reducing the weight of the lens.

Such a lens is called a Fresnel lens, and convex and concave lenses can be constructed in very thin thickness.

Fresnel pattern (fresnel pattern) is a shape in which a plurality of concentric circles having a different radius on the plane, such as a Fresnel lens is drawn, in the present invention is a pattern for condensing, scattering or scattering light because the lens or prism is arranged along the pattern of the pattern Explain.

The radiation pattern is a shape that spreads along a straight line from the center to a multi-direction, and in the present invention, since the lens or prism is disposed along the pattern of the pattern, the radiation pattern is described as a pattern for dispersing or scattering light.

The scattering pattern includes a pattern in which various shapes, including vertical, horizontal, diagonal, checkerboard, and wave, are regular or irregular, and in the present invention, the lens or prism is disposed along the pattern of each pattern. This is described as a pattern that is irregularly scattered through refraction, diffraction, and reflection.

The optical pattern includes the described Fresnel pattern, the radiation pattern, and the scattering pattern. The optical pattern is a pattern that can change a light propagation path to refraction, diffraction, reflection, etc. by arranging a lens or a prism along the pattern of the pattern.

An injection mold is a device which forms an external shape of an object to be molded into an intaglio shape, and is formed by embossing an object because it is injected after heating and injecting a liquid material into a liquid state.

In the present invention, by using an injection mold and injecting liquid silicon, fine patterns, in particular, fine and fine patterns such as optical patterns are molded.

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2 is a cross-sectional view illustrating a function of an edge type light guide plate according to a first embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the edge type light guide plate 100 according to the first embodiment includes a body portion 110, a light source 120, a reflecting portion 130 and the scattering portion 140 Configuration.

The main body 110 forms one or more grooves 112 at both ends, and inserts and fixes the light source 120 in each groove 112, and an optical pattern 114 designed as an optical design on the lower surface thereof. The optical pattern 114 is a pattern by an optical design and has any shape selected from an intaglio or an embossment.

In the accompanying drawings, it is confirmed that the optical pattern 114 is molded in a concave shape on the lower surface of the main body 110.

The plane according to an embodiment of the main body 110 will be described with reference to the accompanying drawings.

3 is a plan view illustrating the structure of a main body according to a first embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the main body 110 is formed with one groove 112 on each side, each groove 112 is provided with a plurality of light sources (120). In the accompanying drawings, each of the grooves 112 are provided on each side, but one or more may be provided.

On the other hand, the pattern of the optical pattern 114 formed on the lower surface of the body portion 110, although the pattern of the Fresnel pattern is shown as a dotted line may further include a variety of patterns including a radiation pattern and scattering pattern.

Patterns of the various optical patterns 114 will be described in detail below with reference to the accompanying drawings.

4 is a diagram illustrating a pattern of an optical pattern including a scattering pattern, a radiation pattern, and a Fresnel pattern according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings in detail the pattern of the various optical patterns, the upper left is a pattern by a vertical pattern of a straight line, when used as an optical pattern to scatter the light in the vertical direction as shown in the arrow direction also shown Polarization characteristics due to the vertical can be generated.

The width and spacing of each pattern by the pattern can be adjusted, and the horizontal pattern and the diagonal pattern pattern have similar functions and functions, so they are included in the vertical pattern pattern and will not be illustrated and described in the drawings.

In the following, the directions, widths and intervals, functions, and actions of the arrows shown in the patterns are the same, and thus, descriptions thereof will not be repeated unless necessary.

The upper right is a pattern due to the vertical wave pattern, and scatters light in the vertical wave direction and may have polarization characteristics in the vertical wave direction. Others will not be duplicated.

The upper left is a checkerboard pattern in which patterns of vertical and horizontal patterns of a straight line are mixed, and when used as an optical pattern, the light is scattered simultaneously in the up and down and left and right directions as shown in the arrow direction. In addition, in the case of the diagonal checkerboard pattern mixed with the diagonal line has a similar function and action will not be illustrated and overlapped with the drawings.

The middle right is a mixture of patterns of vertical and horizontal wave patterns that scatter light in all directions.

The lower left half is a pattern by a radiation pattern and is a pattern or pattern that scatters in every direction like an arrow shown with a pattern connected in a straight line from the center in multiple directions.

The lower right is a pattern by a Fresnel pattern, a pattern having a large number of concentric circles having different radii, and scattering light in the direction of the arrow shown.

The lower left is a pattern of random patterns that mixes various patterns so that light is scattered evenly in all directions.

Referring to FIG. 2 again, the light source 120 is made of a light emitting diode (LED) emitting light by receiving direct current electricity, and becomes a point light source when it is composed of a single light emitting diode. When the light emitting diodes are arranged in a line, they become a line light source.

Here, the main body 110 receives the light of the point light source or the linear light source from the light source 120 from the edge and converts the light into a face light source.

The main body 110 is made of silicon (Si) and is injection molded using an injection mold.

The lower surface of the injection mold is formed with an optical pattern to be molded on the lower surface of the body portion (100). At this time, the optical pattern of the injection mold and the main body portion 100 should be optically designed in the shape of the embossed and intaglio patterns opposite to each other.

By using such an injection mold, a pattern due to a complex pattern can be precisely molded, and the pattern of the injection mold according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 5 is an explanatory view illustrating an enlarged portion of a lower surface of an injection mold in which the Fresnel pattern A portion of FIG. 4 is embossed according to an embodiment of the present disclosure.

Hereinafter, with reference to the accompanying drawings, a lower surface 300 of the injection mold for injection molding the body portion 110 is shown.

On the lower surface 300 of the injection mold, patterns of the continuous column optical pattern 114-1 and the discontinuous dot optical pattern 114-2 are embossed on the circumference of the concentric circle by the Fresnel pattern, respectively. have.

For the sake of simplicity of illustration and description of the drawings, the pattern of the column optical pattern 114-1 is illustrated in a triangular prism shape, and the pattern of the dot optical pattern 114-2 is illustrated in a square horn shape.

The cut surface of the column optical pattern 114-1 may have any shape selected from polygonal patterns including a circle, and has a rod shape continuously or discontinuously along the circumference of the concentric circle.

The dot optical pattern 114-2 is a horn shape having a shape selected from among polygonal cylindrical shapes having a circular bottom surface.

The angle formed by the base of the pillar optical pattern 114-1 and the dot optical pattern 114-2, that is, the inner angle or the outer angle may vary depending on the position.

In this way, since the angle of the base side is different, the scattering direction of light can be selected or collected.

That is, in the case of the Fresnel pattern, the inner or outer angle of the bottom side may be different in order to select the magnification while making the convex or concave lens as a whole.

In addition, in the accompanying drawings, the state of forming the pattern of the column optical pattern 114-1 and the dot optical pattern 114-2 is shown, respectively, by selection, in the concentric circles alternately or the same concentric circles It can be modified in various ways, such as mixed use in an alternating state.

In the accompanying drawings, since the optical pattern 114 is embossed on the lower surface 300 of the injection mold, the negative optical pattern 114 is molded on the lower surface of the main body 110 to be ejected.

On the other hand, when the optical pattern 114 is intaglio formed on the lower surface 300 of the injection mold, an embossed optical pattern 114 is formed on the lower surface of the body portion 110 to be injection molded.

In addition, the optical pattern 114 may be formed on the bottom surface 300 of the injection mold in a state where embossed and intaglio are mixed.

In the present invention, the optical pattern 114 is formed on the lower surface 300 of the injection mold to form a pattern by selecting any one of the Fresnel pattern, the radiation pattern and the scattering pattern or by selecting any one or more patterns It is preferable.

Hereinafter, an optical pattern formed on the bottom surface of the injection mold will be described in detail with reference to the accompanying drawings.

FIG. 6 is a view illustrating a pattern of an optical pattern formed on a bottom surface of an injection mold for injection molding a main body part according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings in detail, the drawings shown at the top is an optical pattern in a state of mixing the pattern of the Fresnel pattern and the radiation pattern. In other words, it can be scattered in every corner and evenly so that there is no part which does not emit light.

The pattern of the drawing shown at the bottom shows the scattering pattern in the center and the optical pattern in the state of mixing the Fresnel pattern and the radiation pattern in the outer portion.

The pattern by the optical pattern at the bottom can scatter light evenly in all directions in a random multi-direction at the center, and condense evenly at every corner and condense it so as not to escape to the outside.

An embossed or engraved optical pattern 114 is formed on the lower surface 300 of the injection mold, and the main body part 110 is injection molded by injecting silicon.

Therefore, the main body 110 in which the optical pattern 114 of the opposite shape is formed can be manufactured very quickly and accurately.

That is, since the injection mold and the silicon are used, the complicated pattern optical pattern 114 can be repeatedly formed very precisely.

Referring again to FIG. 2, the light source 120 is made of a light emitting diode (LED), and functions to generate pure white light having high luminance.

However, when the light emitting diode is high in brightness but generates light of a specific color other than pure white, the light emitting diode may generate pure white light by the scattering unit 140 synthesized with a phosphor.

Phosphors have a characteristic of generating visible energy of a long wavelength and at a low energy level when light energy of ultraviolet rays is injected. In this case, the color of light generated by the characteristics of the phosphor material is different.

It is a technique used in the present invention that the color of the light generated and output by the characteristics of the phosphor and the color of the incident high brightness light are added together to generate and output a high brightness white light.

That is, when the light source 120 is a high luminance blue light emitting diode, the phosphor, which is a phosphor emitting yellow light, is mixed with the scattering unit 140.

Therefore, the high luminance blue light generated from the light source 120 is scattered inside the main body unit 110 and emitted as a surface light source, thereby emitting a high luminance white light by the yellow phosphor mixed in the scattering unit 140. .

On the other hand, if the light source 120 is a light emitting diode that generates near-infrared light, phosphors or phosphors emitting the colors of red (R), green (G), and blue (B) are mixed with the scattering unit 140. .

Therefore, the light generated from the light source 120 and scattered and diffused inside the main body 110 is emitted as white light by the RGB phosphor mixed in the scattering unit 140.

The reflector 130 may be formed of an aluminum (Al) thin plate, and may be any one selected from flat or formed with an optical pattern 134.

When the optical pattern 134 is formed in the reflector 130, the optical pattern 114 may be formed to be the same as or different from the optical pattern 114 designed on the bottom surface of the main body 110, and any one may be selected as necessary.

In the case of forming the optical pattern 134 on the reflecting unit 130, the aluminum thin plate is pressed and molded by using a pressing die.

The reflector 130 may be attached to the lower surface of the main body 110 in close contact with each other so that the surface light source scattered from the inside of the main body 110 and emitted to the lower surface is reflected to prevent incident or exit. .

The optical pattern 114 and the optical pattern 134 reinforce scattering and reflection of light.

The scattering unit 140 is made of silicon and functions to scatter again in order to uniformize the luminance of the light emitted from the main body unit 110 to the surface light source.

On the other hand, the scattering unit 140 is injection molded by injecting silicon into the injection mold.

In addition, when the light source 120 does not emit white light, the scattering unit 140 may be injection molded by including a corresponding phosphor to finally emit white light.

According to the present invention, since the light incident from the light source to the side of the main body is scattered by the optical pattern, it is converted into a surface light source that does not partially generate a difference in brightness and generates constant luminance at every corner, and is reflected to the upper surface of the main body by the reflector. Exit.

In addition, there is an advantage to emit white light even when using a light emitting diode that is scattered at a uniform brightness once again by the scattering unit and does not emit white light by the included phosphor.

On the other hand, since the vertical and horizontal prism plates are not used, the manufacturing process is very simple, the production time and defect rate are reduced, and the overall configuration is simple, so that there is no attenuation of luminance occurring at the interface between the medium and the medium. .

In addition, the number of components of the LGP reduces the overall volume and weight of the non-light emitting display device.

7 is a cross-sectional view illustrating a function of an edge type light guide plate according to a second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the edge type light guide plate 200 according to the second embodiment is a configuration including a main body portion 210, a light source 220, a reflecting portion 230.

The main body 210 is made of silicon (Si) and is injection molded using an injection mold, and forms one or more grooves 212 at both ends and inserts and fixes the light source 220 in each groove 212. .

In this case, any one or any one or more selected from silver (Ag), aluminum (Al), and nanoparticles 214 of hollow silica (SiO 2) microspheres are mixed and contained.

On the other hand, the optical pattern according to the first embodiment can be molded on the lower surface of the body portion 210 by selection.

Since the nanoparticles 214 are irregularly distributed and each reflects light, the nanoparticles 214 are diffusely reflected to maintain the brightness of the incident light as much as possible, thereby facilitating the conversion to the surface light source having an extended scattering range.

That is, the light incident by the nanoparticles 214 repeats total reflection, refraction, and diffraction and scatters into a wide range of surface light sources, while maintaining the incident luminance to the maximum.

The light source 220 is formed of a light emitting diode similarly to the light source 120 according to the description of the first embodiment.

The reflector 230 is made of a thin plate of aluminum (Al) and is attached to the lower surface of the main body 210 to reflect the surface light source from being emitted to the lower surface.

Here, the reflector 230 may form an optical pattern in the same manner as the reflector 130 according to the description of the first embodiment.

The present invention of such a configuration has the advantage that the light incident to the side of the main body portion from the light source inserted into the groove is converted to the surface light source in the state in which scattering is promoted by the nanoparticles and maintains the brightness is emitted.

In addition, the configuration is very simple, easy production and storage distribution at a low cost, and has the advantage of reducing the weight and volume of the entire display device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

100, 300: edge type light guide plate 110, 210: main body
112, 212 groove 114, 134 optical pattern
120, 220: light source 130, 230: reflector
140: scattering unit 214: nanoparticles
300: lower surface of injection mold

Claims (17)

A main body part having one or more grooves each of which is formed of an intaglio and an embossed with an optical pattern on a lower surface thereof and each of which has a light source inserted into both ends thereof;
A reflector attached to a lower surface of the main body to reflect light; And
A scattering unit attached to an upper surface of the main body to scatter light; Including,
The reflective part is a light guide plate, characterized in that the optical pattern is formed in the intaglio on the lower surface, the embossed on the upper surface.
The method of claim 1, wherein the optical pattern,
A light guide plate comprising a Fresnel pattern, a radiation pattern, and a scattering pattern.
The method of claim 2, wherein the scattering pattern,
A light guide plate comprising a configuration consisting of at least one selected from a vertical pattern, a horizontal pattern, an oblique pattern, a wave pattern, and a checkerboard pattern.
The method of claim 2, wherein the optical pattern,
A light guide plate comprising a constitution comprising at least one selected from a discontinuous dot shape and a continuous column shape.
The method of claim 4, wherein the dot shape,
A light guide plate, characterized in that the tubular shape has a shape of any one selected from polygons including a circular bottom surface and consisting of a horn shape.
The method of claim 4, wherein the columnar shape,
A light guide plate having a configuration in which the cut surface has any shape selected from polygons including a circle and has a rod shape.
The method of claim 1, wherein the main body portion,
The light guide plate, characterized in that consisting of injection molding by injecting silicon into the injection mold formed with the optical pattern.
The method of claim 1, wherein the reflector,
A light guide plate, characterized in that the compression molding of the aluminum thin plate by the compression molding die formed with the optical pattern.
delete The optical pattern of claim 1, 2, 4, 7, or 8, wherein the optical pattern comprises:
The light guide plate which consists of a structure which changes the base side angle of each shape according to the position of a pattern.
The method of claim 2, wherein the optical pattern,
A light guide plate characterized by forming at least one selected from the shape of an embossed dot, an intaglio dot, an embossed pillar, and an intaglio pillar in each pattern.
The method of claim 1, wherein the scattering unit,
A light guide plate made of a structure containing a phosphor that generates white corresponding to the light source.
Silver, the body portion containing at least one nano-particles selected from aluminum, hollow silica microspheres and each having at least one groove for inserting a light source at both ends; And
A reflector attached to a lower surface of the main body to reflect light; Including,
The main body portion is formed in any one selected from the intaglio and embossed with an optical pattern on the lower surface,
The reflective part is a light guide plate formed with an optical pattern embossed on the upper surface, and an optical pattern engraved on the lower surface.
The method of claim 13, wherein the body portion,
The light guide plate, characterized in that consisting of injection molding by injecting the silicon mixed with the selected nanoparticles into a mold.
delete The method of claim 13, wherein the reflector,
A light guide plate, characterized in that the compression molding of the aluminum thin plate by the compression molding die formed with the optical pattern.
delete

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