WO2013100234A1

WO2013100234A1 - Lamp device and lcd using the same

Info

Publication number: WO2013100234A1
Application number: PCT/KR2011/010336
Authority: WO
Inventors: Kwang Ho Park; Myoung Soo Ahn; Woo Young Chang; Moo Ryong Park; Byoung Eon Lee
Original assignee: Lg Innotek Co., Ltd.
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2013-07-04

Abstract

Provided is a lamp device, comprising a plurality of LED light source formed on a printed circuit board, a resin layer for diffusing and guiding forward the emitted light, an optical pattern layer arranged over the resin layer and provided with optical patterns wherein the optical pattern layer comprises an adhesive pattern layer forming a first air area which surrounds the surroundings of the light shielding pattern.

Description

LAMP DEVICE AND LCD USING THE SAME

The present invention relates to a lamp device, a LCD and a lamp device for a motor vehicle using a lamp device in which a light guide plate is removed to thin the lamp device and a light efficiency is ensured.

Generally, a lamp device for guiding light emitted from a light source and illuminating has been necessary in various fields such as a lamp for lighting, a lamp for a motor vehicle, and LCD, or the like. In this lamp device, a technology for thinning the device and a configuration for increasing a light efficiency have been recognized as the most important factors. As one example for applying to the lamp device, a liquid crystal display will be described. The liquid crystal display (LCD) is a display configured by supply data signals to a pixel arranged in a matrix depending on image information and adjusting a light transmitting rate of the pixel to obtain a desired image and since the LCD itself does not emit light, a lamp device is installed on a rear surface to display the image.

Referring to FIG. 1, a light guide plate 30 of a flat form is provided on a substrate 20 in the lamp device 1 and a plurality of side-typed LED 10(only one shown) is provided as an array type on a side of the light guide plate 30.

In LED, the light L incident to the light guide plate 30 is reflected upward by a fine reflection patterns or a reflection sheet 40 and is projected from the light guide plate 30 and is supplied to a LCD panel 50 arranged over the light guide plate 30 as back light. Here, in this lamp device, as shown in FIG. 2, a plurality of optical sheets such as a diffusion sheet 31,

prism sheets

32, 33 or a protection sheet 34, or the like may be additionally provided between the light guide plate 30 and the LCD panel 50.

The lamp device serves to evenly emit light to a rear surface of the LCD which can not emit light for the display image to be viewed, and further the light guide plate is a plastic forming lens and serves to perform even brightness and illuminating of the lamp device and uniformly transfers the light emitted from a light source (LED) to an entire LCD surface. Accordingly, this light guide plate has been an essential element for the lamp device, however, there is a limitation to thinning entire thickness of the lamp device due to a thickness of the light guide plate itself and further in case of a large area lamp device, image quality is degraded.

The present invention has been proposed to solve the aforementioned drawbacks and an object of the present invention relates to provide a back light in which a light guide plate essential for a general lamp device is removed and a light source is induced by using a resin layer of film type to decrease the number of light source and the entire thickness of the lamp device is thinned to increase a freedom degree of the product design.

Specially, an optical pattern layer provided with optical patterns is formed wherein the boding material is patterned (adhesive pattern layer) to provide an air region, and thus hot spot occurred in the light shielding pattern part and a dark part can be removed. In addition, in the lamp device reliability between the adhesive material and the elements to be bonded is ensured and there is no significant difference on the optical properties.

The present invention relates to provide a lamp device, comprising a plurality of LED light source formed on a printed circuit board, a resin layer for diffusing and guiding forward the emitted light, an optical pattern layer arranged over the resin layer and provided with optical patterns wherein the optical pattern layer comprises an adhesive pattern layer forming a first air area which surrounds the surroundings of the light shielding pattern.

Further, the present invention relates to provide a lamp device further comprising a second air area between the diffusion plate and the optical pattern layer in case where the diffusion plate is further provided over the optical pattern layer.

According to the present invention, an optical pattern layer provided with optical patterns is formed wherein the boding material is patterned (adhesive pattern layer) to provide an air region, and thus hot spot occurred in the light shielding pattern part and a dark part can be removed. In addition, in the lamp device reliability between the adhesive material and the elements to be bonded is ensured and there is no significant difference on the optical properties.

The above and other aspects, features and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIGS. 1 and 2 are perspective view showing a configuration of a back light according to a prior art;

FIG. 3 is a view showing the main parts of a lamp device according to the present invention;

FIGS. 4-6 are views showing a manufacturing process of an air gap module for implementing an air area according to the present invention;

FIG. 7 is a view showing an arrangement of the LED light source according to the present invention; and

FIGS. 8 and 9 are views showing a configuration of a lamp device according to another embodiment of the present invention.

According to a preferred embodiment of the present invention, a lamp device is provided, comprising a plurality of LED light source formed on a printed circuit board, a resin layer for diffusing and guiding forward the emitted light, and an optical pattern layer arranged over the resin layer and provided with a first air area surrounding the surroundings of the optical pattern.

Specially, the first air area may include a first substrate and a second substrate included in the optical pattern and the adhesive pattern layer is patterned to be applied to the places except for the first air area surrounding the surroundings of the optical pattern.

Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Wherever possible, the same reference numerals will be used to refer to the same elements throughout the specification, and a duplicated description thereof will be omitted. It will be understood that although the terms first , second , etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element.

The present invention is provided with, comparing to the prior are, an air gap module provide with air layer formed by pattering the optical pattern layer or the diffusion plate or using a separate member to form an air area with patterning the adhesive material (adhesive pattern layer) to improve optical property , and specially the light guide plate is removed and replaced with the resin layer to significantly thin a total thickness of the lamp device and further the number of the light source is decreased.

FIG. 3 is a view showing the main parts of a lamp device according to the present invention.

Referring to the drawings, a lamp device according to the present invention may include a plurality of LED light sources 130 formed on a printed circuit board 110, a resin layer 140 for diffusing and inducing forward the light emitted, and an optical pattern layer 150 formed over the resin layer 140 and including an optical pattern 151.

Specially, the optical pattern layer 150 may include an adhesive pattern layer 153 forming a first air area152 which surrounds the optical pattern.

That is, the adhesive pattern layer 153 may form a spaced space (fist air region) having a predetermined pattern on the optical pattern 151 and apply the adhesive material to exceptional regions for implementing the adhesive pattern layer.

That is, as the configuration as shown in the drawings, with respect to an arrangement relation between the optical pattern layer 150 and the adhesive pattern layer 153, the optical pattern layer 150 may include a first substrate 150A and a second substrate 150B inside which the optical pattern is included and the adhesive pattern layer 153 is applied to the region except for the first air area152 surrounding the light shielding pattern surroundings for the first substrate 150A and the second substrate 150B to be adhered. In the drawing, even though the first substrate 150A and the second substrate 150B are shown, the second substrate 150B may be omitted in some cases.

That is, the optical pattern may be formed as a light shielding pattern for avoiding a concentration of the light emitted from the LED light source, and for this purpose an aligning is necessary between the optical pattern 151 and the LED light source 130 and after the aligning, the optical pattern is adhered using adhesive material to ensure fixing power. In case where a pattern configuration forming the fist air area152 is adhered while adhering by forming the adhesive patter layer 153, hot spot which is occurred by placing the adhesive material over the light shielding pattern or dark region can be avoided and increases uniformity degree of the light due to air layer.

In the configuration of the lamp device as described in the forging, a reflection film 120 may be laminated on an upper surface of the printed circuit board, and further a diffusion plate 170 may be provided over the resin layer 140, and an air gap module provided with a second air area160 may be provided between the optical pattern layer and the diffusion plate. Furthermore, a prism sheet and a protection sheet, or the like may be provided over the diffusion plate.

The lamp device according to the present invention will be described in detail hereinafter.

The resin layer 140 may be laminated to surround the surroundings of the LED light source 130 and serve to diffuse the light emitted to a side direction from the light source. That is, a function of the prior light guide plate is performed with the resin layer 140. It has to be understood that the resin layer may be formed with any material capable of diffusing the light. For example, main material of the resin layer according to the present invention may be resin made mainly of urethane acrylate oligomer. For example, urethane acrylate oligomer of synthetic oligomer mixed with polymer type of polyacrylic may be used. Of course, IBOA(isobornyl acrylate), HPA(Hydroxylpropyl acrylate, 2-HEA(2-hydroxyethyl acrylate)of low boiling point diluted type reactive monomer, or the like may be further comprised thereto and photo-initiator as additive (for ecample, 1-hydroxycyclohexyl phenyl-ketone, or the like) or antioxidant, or the like may be mixed.

Furthermore, the resin layer may include a bead 141 in order to increase diffusion and reflection of the light. The bead may be included at 0.01-0.3% based on a total weight of the resin layer. That is, the light emitted to a side direction from the LED is diffused and reflected through the resin layer and the bead to progress upward. Here, when a reflection film 120 and a reflection pattern 121, are to be provided, which are described later, this reflection function may be accelerated. The presence of the resin layer significantly decreases a thickness occupied by a prior light guide plate to thin the entire product and further to make the product to be flexible wherein it may be applied to a flexible display as a wide use.

Referring to FIGS. 4 and 5, a manufacturing process for the optical pattern layer 150 according to the present invention is shown schematically.

Referring to a entire configuration shown in FIG. 3 and FIG. 4, the optical pattern layer 150 formed over the resin layer 140 may be provided with a first substrate 150A and a second substrate 150B in which a light shielding pattern is included, and further a adhesive layer 153 which is to be applied to the region except for the first air area surrounding the surroundings of the optical pattern 151 may be included. That is, in a process order, firstly the optical pattern is printed on the first substrate 150A and then the adhesive pattern layer 153 surrounding the optical pattern is formed and the second substrate 150B is adhered to completely form the optical pattern layer 150. Of course, the optical pattern may be formed on the second substrate 150B.

Here, the first substrate 150A and the second substrate 150B may be formed with material having excellent light transmitting rate, for example, PET. The optical pattern placed between the first substrate 150A and the second substrate 150B basically performs a function of the light emitted from the LED light source not being concentrated, and further the optical pattern may be light shield-printed on one of the first substrate 150A and the second substrate 150B. Additionally, an align is implemented by adhering two substrates as an adhesive layer to which adhesive material is applied surrounding the surroundings of the light shielding pattern. That is, an adhesive configuration of the first substrate 150A and the second substrate 150B may perform a function of fixing the printed light shielding pattern 151. Furthermore, the adhesive layer may be formed with thermosetting PSA, thermosetting adhesive material, UV thermosetting PSA type material.

In FIG. 5, the optical pattern 151, the adhesive pattern layer 153, and the first air area formed therey are shown.

When the adhesive pattern layer 153 is formed by using the adhesive material as surrounding the surroundings of the optical pattern 151 printed as a specific pattern on the first substrate, the second substrate is adhered to form a predetermined space as a closed configuration in which an air layer is formed, referring to as a first air region . A plain shape of the first air area152 formed by the adhesive pattern layer 153 may be various types such as a circle, oval, rectangular, square, or polygonal, or the like. The adhesive pattern layer may be formed with thermosetting PSA, thermosetting adhesive material, UV thermosetting PSA type material.

Further, the optical pattern 151 may be formed as a light shielding pattern to implementing light shielding effect in order to avoid that light intensity is so strong that optical property is degraded and yellowish is drawn. That is, the light shielding pattern may be printed by using light shielding ink for light not to be concentrated.

Here, the optical pattern does not serve to completely shield the light and thus a light shielding degree or diffusion degree may be adjusted with one optical pattern to perform a partial light shielding and diffusion. Furthermore, the optical pattern may more preferably be formed with overlapping printing configuration of complex patterns. Here, the overlapping printing configuration means that one pattern is formed and then one pattern shape is printed over the pattern.

For example, in case of forming the optical pattern 151, a diffusion pattern formed below the polymer film in a light emitting direction by using the light shielding ink comprising one selected from TiO₂, CaCO₃, BaSO₄, Al₂O₃, and Silicon, and a light shielding pattern formed by using a light shielding ink comprising Al, or a mixture of Al and TiO₂ are overlapped-printed. That is, the diffusion pattern is white-printed on a surface of the polymer film and then the light shielding pattern is formed over the diffusion patter as a dual configuration, and vice versa. Of course, the patterning design may be varied in consideration of light efficiency, intensity and light shielding rate. Further, in a sequential lamination configuration as a triple layer, the light shielding pattern of a metal pattern is provided on a middle part thereof and the diffusion pattern is provided on upper and lower part thereof, respectively. In this triple configuration, the aforementioned material may be used, and as a preferable example, TiO₂having excellent refraction rate may be used to form one of the diffusion patterns and the other diffusion pattern may be formed by using CaCO₃having a good optical stability and color feeling, together with TiO₂, and the light shielding pattern is formed by using Al having an excellent hiding property wherein the light efficiency and uniformity can be ensured through the triple configuration. Specially, CaCO₃serves to finally implement white light through deduct an exposure of yellowish light to ensure more stable light efficiency and further inorganic material such as BaSO₄, Al₂O₃, Silicon, in addition to CaCO_3,

a reflection film 120 may be further provided. The reflection film 120 may have a reflection material to diffuse the light emitted from the LED light source and further may be provided with a reflection pattern 121 through a white printing. Specially, the reflection film 120 may be laminated on the printed circuit board and further the LED light source 130 is protruded outside through a hole formed on the reflection film. When the LED light source is provided as a side view LED, the number of the light source can be significantly reduced as described in the forgoing, and further a reflection pattern 130 may be provided for improving significantly a light reflection rate to decrease the reduction rate. Here, the reflection pattern may be printed by using a reflection ink comprising one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, and PS. The reflection pattern may be formed in a light emitting direction of the LED light source, and in special the patterns are arranged such that the pattern density is increased gradually as it recedes from the light emitting direction of the LED light source.

Furthermore, as shown in FIG. 3, an air gap module may be further provided between the optical pattern layer 150 and the reflection plate 170. FIG. 6 shows the air gap module arranged between the optical pattern layer 150 and the reflection plate 170 as shown in FIGS. 3 and 4.

That is, in the configuration of the lamp device according to the present invention, an air layer (second air region; 160) is configured additionally between the optical pattern layer 150 and the reflection plate 170 and due to the presence of the second air area160, the light emitted from the light source is diffused and light uniformity is improved. Furthermore, a thickness of the second air area160 may be 0.01-2mm in order to minimize a light deviation transmitted through the resin layer 140 and the optical pattern layer 150.

Here, in the second air area160 the air layer may be formed under the diffusion plate wherein it refers to as air gap module including the second air area which is implemented by this configuration. The air gap module may include all configurations formed by processing the diffusion plate itself to form the air area (air layer), or forming a separate structure under the diffusion plate to form the air region. That is, as shown in FIG. 6(a), a spacer 171 is formed under the diffusion plate 170 to form the second air area160, or as shown in FIG. 6(b), a bridge 172 is provided by patterning the lower part of the diffusion plate and forming the second air area 160 closely to the lower layer. The integrated configuration may be varied depending on the patterning shape, that is, the shape forming the air area, and as a result, it is obvious that the shape of the bridge may be varied, which falls in a range of the present invention. Further, as shown in FIG.6(c), the air area 160 may be formed by using a separate structure in addition to patterning the lower surface of the diffusion plate. The bridge 174 in the structure as shown in the drawing is formed by a spacer member; however, the gist of the present invention includes this configuration and thus various variations for forming the air layer under the diffusion plate may be fallen into the gist of the present invention. As shown in FIG. 6(d), like (b) the configuration of patterning the diffusion plate itself and (c) the configuration of using a separate structure, in addition to a singular air layer, the air area 160 may be formed as a plural layer by adopting the

structures

175, 176 capable of implementing a independent air layer.

The lamp device according to the present invention, as shown FIG. 7, may be implemented through an arrangement of the light sources 130 emitting light. That is, the LED light source 130 may be arranged by using the side view LED to reduce the number of the light source.

FIG. 8 is a view showing another embodiment of the lamp device according to the present invention.

Referring to the FIG. 8, the lamp device according to the present invention may include a plurality of LED light source 130 formed on a printed circuit board 110, a reflection film 120 including a reflection pattern 121 over the printed circuit board 110, and a resin layer 140 which is laminated on the printed circuit board 110 and diffuse and induce forward the light emitted from the LED light source 130. Specially, in the present invention, the reflection pattern may be formed with pattern material of ceramic material including air structure.

Of course, in this case, the reflection film 120 may be provided with a groove on upper surface thereof through which the LED passes and further may include an optical pattern layer 150 including a diffusion plate 170 formed over the resin layer 140 and an optical pattern placed between the resin layer and the diffusion plate.

Referring to FIGS. 8 and 9, the reflection pattern 121 may be formed as a patterned shape on upper surface of the printed circuit board. For example, an entire sectional face of the reflection pattern 121, as shown in the drawings, may be patterned variously toward the light source to s wedge type and a flat type, or the like. The reflection pattern may be printed by using a various printing method such as gravure printing and serigraph, or the like. The reflection pattern 121 may be formed with a pattern material of ceramic material including the air structure 122 and the pattern material has a refraction rate of 1-1.4 and may include the structure 122 provided with vacuum or air such as bubble inside the material.

That is, the air structure 122 may be a glass bubble provided with bubble material having tens microns of vacuum surrounded by glass of several nanometers of thickness.

As one example of the pattern material, the ceramic material containing the air structure 122 may be fixed to the resin for the light guide plate forming the resin layer of the present invention, and the reflection pattern may be formed easily by ink printing method to provide various shape and patterns thereof. The resin for the light guide plate means the material for implementing the resin layer 140 and the material for the resin layer 140 may be the same as the third embodiment.

When the reflection pattern is formed, it may be provided by printing the reflection patterns with a pattern material such as a mixture of the reflection ink comprising one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, and PS (Poly Stylen) and a ceramic material containing the air structure. Further, in case where the reflection pattern 121 needs to be shaped as a specific configuration such as a wedge type, the desired shape may be made by a stamping method or pressing method. According to the reflection pattern containing the air, the light emitted from the light source is total-reflected due to the reflection pattern and the light shielding pattern printed with low-refractory material so that the whole brightness and light uniformity may be improved.

FIG. 9 shows another embodiment of the present invention, differently from the configuration as shown in FIG. 8, wherein the optical pattern 151 which is placed between the resin layer 140 and the diffusion plate 170 may be formed by using a pattern material. The pattern material may have a refraction rate of 1-1.4 as similar to the aforementioned and means the material containing the air structure provided with vacuum or air therein such as glass bubble, and the material consisting of the resin layer 140 and the pattern material may be mixed for printing the optical pattern, similar to the reflection pattern.

Meanwhile, in FIG. 9, a configuration of forming directly the optical pattern under the diffusion pattern as forming the optical pattern 151 is shown, however, the configuration is not limited thereto, and the optical pattern may be applied to the lamp device as shown in FIG. 8.

In addition, differently from this method, when the optical pattern 151 is formed, the diffusion pattern formed by using a mixture of the ceramic material containing the air structure and the light shielding ink comprising more than one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, and Silicon under the polymer film in a light emitting direction, the light shielding pattern formed by using a mixture of the light shielding ink containing Al, or a mixture of Al and TiO₂, and the ceramic material containing air, or the overlapping configuration of these patterns may be formed. That is, in the present embodiment, when the reflection pattern or the optical pattern is formed on the reflection film, they may be printed-formed by using the pattern material containing ceramic material comprising air.

The lamp device according to the present invention may be applied to LCD through the following configuration and operation. Referring to FIGS. 3 and 8, the light is emitted to a side direction from a side view LED 130 and the emitted light is reflected and diffused from the resin layer provided, instead of the prior light guide plate, and a light concentration is avoided through the optical pattern layer 150, and light deviation can be minimized through the second air area formed under the diffusion plate. In more detailed description, the light emitted by the reflection film 120 and the reflection pattern 121 is increased in a reflection efficiency to induce forward the light. The light passed through the resin layer 140 is diffused or shielded through the optical pattern 151 formed on the optical pattern layer 150 and the refined light is again refined in optical property through the air gap module formed under the diffusion plate to increase uniformity and then is incident as white light to a LCD panel through a prism sheet 180 and DBEF 190 additionally provided.

Furthermore, the lamp device according to the present invention is not limited to as the back light unit of the LCD. That is, various lamp devices necessary for a lighting such as a lamp for a motor vehicle, a lamp device for a house lighting, and industrial lighting.

Like this, in the lamp device according to the present invention, the light guide plate is removed, and the side view LED is provided as a light source, and the light is guided to be diffused and reflected through the resin layer, and thus it may be thinned and the number of the light source is decreased. Meanwhile, optical property can be improved by providing the reflection pattern, the light shielding pattern and air area of the air gap module and adjusting them to solve the brightness decreasing and the uniformity problems due to reduction of the light source number.

According to the present invention, an optical pattern layer provided with optical patterns is formed wherein the boding material is patterned (adhesive pattern layer) to provide an air region, and thus hot spot occurred in the light shielding pattern part and a dark part can be removed. In addition, in the lamp device reliability between the adhesive material and the elements to be bonded is ensured and there is no significant difference on the optical properties and further precise aligning between elements is possible.

Further, an air gap module which is provided with air layer by patterning a diffusion plate or using separate member is provided to increase optical property such as a lamp device diffusion and light evenness degree.

In addition, a light guide plate essential for a general lamp device is removed and a light source is induced by using a resin layer of film type to decrease the number of light source and the entire thickness of the lamp device is thinned to increase a freedom degree of the product design.

Specially, the side type light emitting diode is installed a right under type to ensure optical property while decreasing significantly the number of light source and the lamp device is applied to a flexible display with removing the light guide plate and further a diffusion plate including a reflective film provided with a reflective patter on a resin layer and air layer is provided to ensure stable light emitting property.

While the invention has been shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

Claims

A lamp device, comprising:

a plurality of LED light source formed on a printed circuit board;

a resin layer for diffusing and guiding forward the emitted light; and

an optical pattern layer arranged over the resin layer and provided with a first air area surrounding the surroundings of the optical pattern.
The lamp device of claim 1, wherein the first air area is formed through a adhesive pattern layer which is patterned to surround the surroundings of the optical pattern formed on a first substrate.
The lamp device of claim 1, wherein the first air area is provided with the first substrate and a second substrate including the optical pattern therein, and the adhesive pattern layer is patterned to be applied to places except for the first air area surrounding the surroundings of the optical pattern.
The lamp device of claim 3, wherein a plain shape of the first air area formed by the adhesive pattern is a circle, oval, rectangular, square or polygonal.
The lamp device of claim 3, wherein the adhesive pattern layer is formed by using thermosetting PSA, thermosetting adhesive material, UV thermosetting PSA type material.
The lamp device of claim 3, wherein a diffusion pattern arranged over the optical pattern layer is further comprised.
The lamp device of claim 6, wherein a second air area placed between the diffusion plate and the optical pattern layer is further comprised.
The lamp device of claim 7, wherein the second air area has a thickness of 0.01-2mm.
The lamp device of claim 6, wherein the second air area is provided integrally to form a bridge by patterning the lower part of the diffusion plate.
The lamp device of claim 6, wherein the second air area is provided as an air gap module by forming the bridge under the diffusion plate with independent spacer member to form the second air area.
The lamp device of claim 3, wherein the lamp device further comprises a reflection film in which a reflection pattern to be laminated an upper surface of the printed circuit board.
The lamp device of claim 11, wherein the reflection pattern or the optical pattern is formed by using one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, and PS.
The lamp device of claim 12, wherein the reflection pattern or the optical pattern further comprises a pattern material formed with ceramic material containing air structure.
The lamp device of claim 13, wherein the pattern material has a refraction rate of 1.0-1.4.
The lamp device of claim 13, wherein the reflection pattern is printed to provide an inclination angle in an emitting direction of the LED light.
The lamp device of claim 11, wherein the resin layer further comprises beads of 0.01-0.3% based on a total resin layer, for increasing a light reflection.
The lamp device of claim 16, wherein the optical pattern is printed as a lamination of at least one pattern layers.
The lamp device of claim 11, wherein the lamp device further comprises a prism sheet or a protection sheet to be laminated over the diffusion plate.
The lamp device, comprising:

a plurality of LED light source formed on a printed circuit board;

a resin layer for diffusing and guiding forward the emitted light;

an optical pattern layer arranged over the resin layer and provided with optical patterns; and

a diffusion plate to be laminated over the optical pattern layer wherein an air gap module is further provided between the optical pattern layer and the diffusion plate.
A liquid crystal display using a side view LED as a light source, provided with;

a resin layer to receive the light source; and

an optical pattern layer arranged over the resin layer and including a light shielding pattern wherein the optical pattern layer comprises an adhesive pattern layer forming a first air area which surrounds the surroundings of the light shielding pattern; and

provided with a diffusion plate arranged over the optical pattern layer and comprising the lamp device of claim 7.