KR102400057B1 - Light unit - Google Patents

Abstract

Embodiments include a printed circuit board; a plurality of light sources disposed on the printed circuit board; a reflection unit disposed on the printed circuit board; and a resin layer disposed on the plurality of light sources, wherein the reflective unit includes a reflective film disposed on the printed circuit board, a transparent film disposed to be spaced apart from the reflective film, and the reflective film and the transparent material Disclosed is a lighting device including a spacer member disposed between the films of the reflective unit and a plurality of holes through which each of the plurality of light sources passes.

Description

Light unit

The present invention relates to a lighting device using an LED as a light source, and further to a backlight unit, a liquid crystal display device, and a vehicle lighting device using the aforementioned lighting device.

A device for realizing lighting by inducing light emitted from a light source is required in various ways in lighting lamps, vehicle lamps, liquid crystal display devices, and the like. In such a lighting device, a technology for thinning the structure of equipment and a structure for increasing light efficiency are recognized as the most important technologies.

As an example in which such a lighting device works, a liquid crystal display device will be described as follows.

Referring to FIG. 1 , in this lighting device 1 , a flat light guide plate 30 is disposed on a substrate 20 , and a plurality of side-type LEDs 10 (only one is shown) are arrayed on the side surface of the light guide plate 30 . is placed as

The light L incident from the LED 10 to the light guide plate 30 is reflected upward by a fine reflective pattern or reflective sheet 40 provided on the underside of the light guide plate 30, is emitted from the light guide plate 30, and then emitted from the light guide plate ( 30) Light is provided to the upper LCD panel 50 .

As shown in the conceptual diagram of FIG. 2 , in such a lighting device, a plurality of optical elements such as a diffusion sheet 31 , a prism sheet 32 , 33 , and a protection sheet 34 are disposed between the light guide plate 30 and the LCD panel 50 . It may be formed in a structure that further adds a sheet.

Therefore, such a light guide plate is basically used as an essential part of such a lighting device, but due to the thickness of the light guide plate itself, it is possible to reduce the overall thickness of the product. is causing

The present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a reflective unit that implements an air region patterned with an adhesive material on the surface of a printed circuit board using white PET to improve reflectance of light and luminance To provide a lighting device that can maximize the improvement, increase the brightness without increasing the thickness of the lighting device or increase the number of light sources, and maximize the control and reflection efficiency of light due to the pattern design of the spacer (spacer) forming the air area. there is

In addition, by removing the light guide plate essential for the structure of the lighting device of the present invention and forming a structure for guiding the light source using a film-type resin layer, the number of light sources can be reduced, and the overall thickness of the lighting device is reduced, Another object of the present invention is to provide a reliable product capable of increasing the degree of freedom in product design.

A lighting device according to one aspect of the present invention includes: a printed circuit board; a plurality of light sources disposed on the printed circuit board; a reflection unit disposed on the printed circuit board; and a resin layer disposed on the plurality of light sources, wherein the reflective unit includes a reflective film disposed on the printed circuit board, a transparent film disposed to be spaced apart from the reflective film, and the reflective film and the transparent material and a spacer member disposed between the films, and the reflection unit includes a plurality of holes through which each of the plurality of light sources passes.

The light emitted from the plurality of light sources may pass through the transparent film and be reflected by the reflective film.

It may include a plurality of reflective patterns disposed on the film of the transparent material.

The spacer may include a plurality of unit spacers and a plurality of first space regions, and the unit spacers may be disposed to be connected to each other.

Each of the plurality of unit spacers may include a hexagonal outer peripheral surface in which each of the plurality of first spatial regions is disposed.

an optical pattern layer disposed on the resin layer, wherein the optical pattern layer includes a first film, a second film disposed on the first film, and a light blocking pattern disposed between the first film and the second film and an adhesive pattern layer.

The light blocking pattern may include a region overlapping each of the plurality of light sources in a direction perpendicular to the printed circuit board.

A lighting device according to another embodiment of the present invention, a printed circuit board; a plurality of light emitting devices disposed on the printed circuit board; a reflection unit disposed on the printed circuit board; a resin layer disposed on the plurality of light emitting devices; and a light blocking pattern disposed on the resin layer, wherein the reflective unit includes a reflective film disposed on the printed circuit board and a transparent film disposed on the reflective film, the reflective film and the transparent The film material includes a plurality of holes through which each of the plurality of light emitting devices passes, and the plurality of light emitting devices are light emitting devices that emit light in a lateral direction.

The reflective unit may include a plurality of first spatial regions formed between the reflective film and the transparent film.

It may include a plurality of reflective patterns disposed on the transparent film and disposed in a direction in which light of each of the plurality of light emitting devices is emitted.

The reflective unit includes a plurality of unit spacer members and a plurality of first space regions disposed between the reflective film and the transparent film, and the plurality of first space regions are mutually provided by the plurality of unit spacers. They may be spaced apart.

Each of the plurality of first spatial regions may include a hexagonal horizontal cross-section.

It may include a first film disposed below the light blocking pattern, a second film disposed above the light blocking pattern, and an adhesive pattern layer disposed on the same horizontal line as the light blocking pattern.

The light blocking pattern may be formed by printing on the lower surface of the second film as a plurality of unit patterns, and the light blocking pattern may include a region in which the density of the plurality of unit patterns decreases.

The adhesive pattern layer may be disposed to be spaced apart from the light blocking pattern by a second space region formed around the light blocking pattern.

According to the present invention, a reflection unit for realizing an air region using white PET (white polyethylene terephthalate) on the surface of a printed circuit board is provided to maximize light reflectance and luminance improvement, and the thickness of the lighting device or the number of light sources It is possible to increase the luminance without increasing, and there is an effect of maximizing the control and reflection effect of light due to the pattern design of the spacer (spacer) forming the air area.

In addition, the present invention forms an optical pattern layer having an optical pattern, and patterning an adhesive material (adhesive pattern layer) to provide an air region, thereby eliminating the occurrence of hot spots and dark areas occurring in the light-shielding pattern portion. In addition, the reliability between the adhesive material and the parts to be adhered is secured, and at the same time, a lighting device without significant difference in optical properties can be realized, and precise alignment between parts is possible.

In addition, by patterning the diffusion plate or using a separate member to provide an air gap module having an air layer, there is an effect of increasing the optical characteristics of diffusion and light uniformity of the lighting device.

In addition, by removing the light guide plate essential to the structure of a general lighting device and forming a structure to guide the light source using a film-type resin layer, the number of light sources can be reduced, the overall thickness of the lighting device is reduced, and product design It has the effect of increasing the degree of freedom of

In particular, it is possible to secure optical characteristics while significantly reducing the number of light sources by directly mounting the side-type light emitting diodes, and it can be applied to the structure of a flexible display by removing the light guide plate. A reflective film including a reflective pattern on a resin layer and a diffusion plate including an air layer to ensure stable light emission characteristics.

1 and 2 are conceptual views showing the structure of a conventional lighting device.
3 is a cross-sectional conceptual view showing the main part of the lighting device according to the present invention.
4 shows an embodiment of a spacer member constituting the reflection unit included in the lighting device according to the present invention described above in FIG. 3 .
5 is a result table comparing the efficiency of the reflection unit according to the present invention.
6 is another embodiment of a lighting device according to the present invention.
7 is another embodiment of a lighting device according to the present invention.
8 and 9 show various embodiments implemented in the optical pattern layer and the diffusion plate according to the present invention, and show specific embodiments of the reflection unit.

Hereinafter, the configuration and operation according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same components are given the same reference, regardless of the reference numerals, and redundant description thereof will be omitted. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

The present invention is to improve reflectance and luminance by arranging a reflective unit that implements a spatial region (air region) including white polyethylene terephthalate (PET) under the LED light source in a lighting device using an LED as a light source. make the gist

In particular, in the case of the present lighting device, in the structure of the conventional lighting device, by patterning an adhesive material (adhesive pattern layer) to form an optical pattern layer or a diffusion plate to implement a spatial area, or using a separate member to provide an air layer The gist is to provide a structure that can improve the optical properties by providing an air gap module and reduce the number of light sources while innovatively reducing the overall thickness of the lighting device by removing the light guide plate and forming it as a resin layer do it with

The lighting device according to the present invention is not limited to being applied as a backlight unit of a liquid crystal display device. That is, it is of course applicable to various lamp devices required for lighting, such as vehicle lamps, home lighting devices, and industrial lighting devices. It goes without saying that the vehicle lamp can be applied to headlights, interior and lighting, and rear lights.

1. Example 1

3 is a cross-sectional conceptual view showing the main part of the lighting device according to the present invention.

Referring to FIG. 3 , the lighting device according to the present invention includes a plurality of LED light sources 130 formed on a printed circuit board 110 , and the LED light source 130 is provided on the upper surface of the printed circuit board 110 . The penetrating structure is configured to include a reflection unit 120 stacked on the printed circuit board 110 . In particular, in this case, it is characterized in that the space area A1 is provided inside the reflection unit 120 . The spatial area A1 may maximize the luminance by enhancing the reflection efficiency of the light emitted from the light source 130 .

In particular, the reflective unit 120 is spaced apart from the first reflective film 121 and the first reflective film 121 made of white PET (white polyethylene terephthalate) in close contact with the surface of the printed circuit board 110 . It may be configured to include a second reflective film 122 of a transparent material that forms the space area (A1). The first and second reflective films 121 and 122 are stacked on the printed circuit board, and the LED light source 130 protrudes outward through a hole formed on the reflective film.

The space area A1 can be formed by forming the first and second reflective films 121 and 122 in an integrally compressed structure without using a separate adhesive or the like, and furthermore, Likewise, it is also possible to realize the first and second reflective films 121 and 122 to be spaced apart to realize the space area A1 in which air is accommodated through a spacer 123 such as a separate adhesive member.

In this case, the first reflective film 121 is a reflective structure that reflects light, and in particular, it is preferable to use white polyethylene terephthalate (PET) in the present invention. In the characteristic reflective unit according to the present invention, the first reflective film can be implemented with a general metal reflective material layer (Ag, etc.) There is (see Fig. 5). That is, when implementing the reflective unit according to the present invention, when white PET (white polyethylene terephthalate) is implemented as the first reflective film, it is possible to realize the effect of improving the luminance of about 30% compared to the conventional one.

In addition, the second reflective film 122 in the present invention is more preferably a film of a transparent material so that the light emitted from the LED is transmitted to the surface of the first reflective film 121 and reflected again.

In particular, in addition to the light emitted from the light source 130 passing through the second reflective film and being re-reflected on the first reflective film, a reflective pattern 124 is printed on the surface of the second reflective film 122 by white printing. It is more preferable to further promote the dispersion of light to improve luminance. A reflective pattern 124 is provided to significantly improve the reflectance of light. The reflective pattern can be printed using a reflective ink including any one of TiO2, CaCO3, BaSO4, Al2O3, Silicon, and PS.

In particular, in the case of the lighting device according to the present invention, as the light source, various types of light sources can be applied, and particularly preferably, an LED having a side-emitting type structure can be used. In this case, the reflection pattern is the light emission of the LED light source. It is preferable to form the pattern in the direction, and in particular, the pattern can be arranged so that the pattern density increases as the distance from the emission direction of the LED light source increases. In the case of implementing an LED having a side-emitting type structure, the advantage of significantly reducing the number of light sources is realized.

FIG. 4 shows an embodiment of a spacer member constituting a reflection unit included in the lighting device according to the present invention described above in FIG. 3 .

That is, the spacer member according to the present invention generally performs a spacer function, such as a spacer member for simply separating the first reflective film and the second reflective film, or a spacer member having adhesive properties, etc. In order to efficiently arrange the spatial area and at the same time improve the adhesion efficiency, the spacer member may be formed by uniformly or randomly patterning the structure patterned as the structure shown in FIG. 4 .

In the spacer member 123 shown in FIG. 4, a plurality of unit spacer members 123a in which a cavity part is implemented are disposed therein, and a first space region ( 123b) can be implemented in a two-dimensional or three-dimensional structure. That is, the cross section of the unit spacing member 123a may be implemented in various shapes such as polygons, circles, ellipses, and the like. In particular, as shown, in addition to the structure in which a plurality of each unit spacer member 123a are arranged in close contact with each other, they are arranged in an irregular composition to each other, so that the first space area 123b inside the unit spacer member 123a and each It is also possible to implement as an air part 123c of an empty space between the unit spacer members 123a.

5 is a result table for comparing the degree of improvement in luminance of lighting devices when the structure of the reflection unit according to the present invention is implemented. (CIE X and CIE Y are color coordinates).

In the table shown, (A) is the measurement of luminance when only one reflective film implemented with Ag is formed on the surface of the printed circuit board in the structure of FIG. 3, (B) is the structure of the reflective unit according to the present invention, That is, when the adhesive pattern material is formed of silicon to form the pattern of FIG. 4 and the first reflective film is made of an Ag film, the luminance improvement result value is measured as compared with the conventional structure (A).

In addition, (C), unlike (B), the first reflective film is formed of white PET, and thus the brightness improvement result is measured compared with the conventional structure (A).

In the case of the measurement result (A), the luminance is 6605 nits, and based on this, the structure of (B) shows a luminance improvement result of about 13% to 7468 nits, and when a reflection unit including white PET according to the present invention is implemented Phosphorus (C) is 8472 nits, indicating a luminance increase rate of 28.6% compared to (A). In other words, when a white PET is used while having a structure (spatial region) patterned with an adhesive material layer, a maximized result of luminance improvement can be realized.

2. Second embodiment

6 is another embodiment of a lighting device according to the present invention.

That is, the second embodiment according to the present invention implements a structure in which a resin layer is laminated on the printed circuit board in the first embodiment described above. The configuration of the resin layer corresponds to a configuration that replaces the light guide plate used in the conventional lighting device, and serves to guide the light emitted from the light source to the front.

Referring to FIG. 6 , the lighting device according to the present invention further includes a plurality of LED light sources 130 formed on the printed circuit board 110 and a resin layer 140 that diffuses and induces the emitted light forward. is composed

That is, the resin layer 140 is stacked in a structure surrounding the LED light source 130 to perform a function of dispersing the light of the light source emitting in the lateral direction. That is, the function of the conventional light guide plate can be performed in the resin layer 140 .

As a matter of course, the resin layer may be basically any resin as long as it is a material capable of diffusing light. For example, as the main material of the resin layer as an embodiment according to the present invention, a resin having a urethane acrylate oligomer as a main material may be used. For example, a mixture of urethane acrylate oligomer, which is a synthetic oligomer, and a polymer type, which is polyacrylic, may be used. Of course, the low-boiling dilution type reactive monomer IBOA (isobornyl acrylate), HPA (Hydroxylpropyl acrylate, 2-HEA (2-hydroxyethyl acrylate), etc. may further include a mixed monomer, etc., as an additive, a photoinitiator (for example, 1 -hydroxycyclohexyl phenyl-ketone, etc.) or antioxidants may be mixed.

In addition, the resin layer 140 may include beads 141 to increase light diffusion and reflection. The bead is preferably included in an amount of 0.01 to 0.3% based on the total weight of the resin layer. That is, the light emitted laterally from the LED is diffused and reflected through the resin layer 140 and the bead to travel upward.

This makes it possible to further promote the reflection function together with the reflection unit 120 according to the present invention described above. Therefore, the existence of the resin layer can innovatively reduce the thickness occupied by the conventional light guide plate, thereby realizing a thinner overall product, as well as having a soft material, so it has versatility that can be applied to a flexible display. be able to

3. Third embodiment

The structure of the lighting device of the third embodiment in which an optical pattern layer that promotes light diffusion is implemented on the resin layer as an improved structure from the structure of the second embodiment described above will be described.

That is, referring to FIG. 7 , in the lighting device according to the present invention, in the structure described above in FIG. 6 , the optical pattern layer 150 is disposed on the resin layer 140 and includes the optical pattern 151 . It can be implemented with a structure provided.

In particular, the optical pattern layer 150 may include an adhesive pattern layer 153 forming a second spatial region 152 surrounding the periphery of the optical pattern. That is, the adhesive pattern layer 153 is implemented by forming a spaced space (second space region) having a pattern of a certain shape in the optical pattern 151 and applying an adhesive material to the other parts to adhere.

That is, in the arrangement relationship of the optical pattern layer 150 and the adhesive pattern layer 153 in the structure of the drawings, the optical pattern layer 150 includes a first substrate 150A including the optical pattern therein, and A second substrate 150B is provided, wherein the adhesive pattern layer 153 is applied to portions other than the second spatial region 152 surrounding the periphery of the light-shielding pattern to form a first substrate 150A and a second substrate. (150B) is bonded.

That is, the optical pattern 151 may be formed as a light blocking pattern formed to prevent the concentration of light emitted from the LED light source 130 , and for this purpose, between the positions of the optical pattern 151 and the LED light source 130 . Alignment is required, and bonding is performed using an adhesive member to secure fixing force after alignment.

The first substrate 150A and the second substrate 150B may be formed of a material having excellent light transmittance, and PET may be used as an example. In this case, the optical pattern 151 disposed between the first substrate 150A and the second substrate 150B basically functions to prevent the light emitted from the LED light source from being concentrated, and the first substrate ( 150A) or the second substrate 150B can be implemented through shading printing, and the two substrates are adhered to each other with an adhesive layer for applying an adhesive material in a structure surrounding the periphery of the shading pattern to implement fishing line. . That is, the adhesive structure of the first substrate 150A and the second substrate 150B can implement the function of fixing the printed light blocking pattern 151 together. In addition, the adhesive layer may use a thermosetting PSA, thermosetting adhesive, or UV curing PSA type material.

When the adhesive pattern layer 153 is formed and adhered in a pattern structure that forms the second spatial region 152 during bonding, strong hot spots or shady areas generated by the adhesive material overlapping the light-shielding pattern are formed. It is possible to prevent generation of the light, and it is possible to increase the uniformity of light due to the presence of an air layer.

The lighting device according to the present invention having the above structure may include a diffusion plate 170 on the resin layer 140 in addition to the above configuration, and the diffusion plate 170 and the optical pattern layer 150 . An air gap module 161 having a third spatial region 160 may be further provided between the . In addition, a prism sheet, a protective sheet, etc. may be additionally provided on the diffusion plate.

FIG. 8 conceptually illustrates the configuration of the optical pattern 151, the adhesive pattern layer 153, and the second spatial region 152 formed thereby.

When the adhesive pattern layer 153 is formed using an adhesive material in a structure surrounding the optical pattern 151 printed in a specific pattern on the first substrate, a predetermined space is formed and the second substrate 150B ), this separation space becomes a closed structure in which an air layer is formed, and this space is defined as a 'second space region'. The planar shape of the second spatial region 152 formed by the adhesive pattern layer 153 may be implemented in various shapes such as a circle, an ellipse, a rectangle, a square, and a polygon. In addition, the adhesive pattern layer may be formed using a thermosetting PSA, thermosetting adhesive, or UV curing PSA type material.

In addition, the optical pattern 151 is preferably formed as a light-shielding pattern so that a certain portion of the light-shielding effect can be realized in order to prevent the optical characteristics from being deteriorated or yellow light from being emitted due to excessively strong light. That is, the light blocking pattern can be printed using the light blocking ink so that light is not concentrated.

The optical pattern is not a function of completely blocking light, but may be implemented so that a light blocking degree or a diffusion degree of light can be adjusted with one optical pattern so as to perform a function of partially blocking and diffusing light. Furthermore, more preferably, the optical pattern according to the present invention may be implemented as an overlap printing structure of a complex pattern. The structure of overlap printing refers to a structure implemented by forming one pattern and printing another pattern shape on the top.

For example, in implementing the optical pattern 151, diffusion formed using a light-shielding ink containing at least one material selected from TiO2, CaCO3, BaSO4, Al2O3, and Silicon on the lower surface of the polymer film in the light emission direction. It can be implemented as an overlap printing structure of a pattern and a light-shielding pattern using a light-shielding ink containing Al or a mixture of Al and TiO2. That is, after forming a diffusion pattern by white printing on the surface of the polymer film, it is also possible to form a light-shielding pattern thereon, or to form a double structure in the reverse order. Of course, it will be obvious that the design of the formation of such a pattern can be variously modified in consideration of light efficiency, intensity, and light blocking rate. Alternatively, it is also possible to form a triple structure in which a light shielding pattern, which is a metal pattern, is formed on the middle layer in a sequential layer structure, and a diffusion pattern is implemented respectively on the upper and lower portions thereof. In such a triple structure, it is possible to select and implement the above-mentioned materials. As a preferable example, one of the diffusion patterns is implemented using TiO2 having excellent refractive index, and CaCO3 having excellent photostability and color is used together with TiO2 to achieve another diffusion. Light efficiency and uniformity can be secured through the triple structure of a structure that implements a pattern and implements a light-shielding pattern using Al, which has excellent concealment. In particular, CaCO3 has a function of finally realizing white light through the function of subtracting the exposure of yellow light, so that more stable light can be realized. You can also use inorganic materials with In addition, it is preferable in terms of light efficiency to form the optical pattern by adjusting the pattern density so that the pattern density decreases as the distance from the emission direction of the LED light source increases.

In addition, the present invention may be implemented by further including an air gap module disposed between the optical pattern layer 150 and the diffusion plate 170 . FIG. 9 shows an embodiment of forming an air gap module disposed between the optical pattern layer 150 and the diffusion plate 170 shown in FIG. 7 .

That is, a structure including an air layer (third space region; 160) between the optical pattern layer 150 and the diffusion plate 170 may be added to the configuration of the lighting device according to the present invention, and the third space region Due to the presence of 160, the effect of diffusing the light emitted from the light source and improving the uniformity of the light is implemented. In addition, in order to minimize the deviation of light transmitted through the resin layer 140 and the optical pattern layer 150 , the thickness of the third spatial region 160 is preferably 0.01 to 2 mm.

The third spatial region 160 may be formed by implementing a structure capable of forming an air layer under the diffusion plate, and including the third spatial region implemented through this structure is defined as an “air gap module” do.

The air gap module includes both a method of realizing a spatial region (air layer) by processing the diffuser plate itself, or a configuration of forming a spatial region by forming a separate structure under the diffuser plate. That is, as shown in (a) of FIG. 9 , a spacer 171 is formed under the diffusion plate 170 to implement the third spatial region 160 , or as shown in (b), the lower portion of the diffusion plate. may be implemented as a structure of the bridge 172 forming a third air area 160 in close contact with the lower layer by patterning.

This integrated structure can be variously deformed according to the patterned shape, that is, the shape of the pattern forming the spatial region, and accordingly, it is obvious that the shape of the bridge can also be variously deformed, and this is also in the gist of the present invention. will be included Furthermore, like the structure shown in (c), in addition to the method of patterning the lower surface of the diffusion plate, it can be implemented as a structure in which the third spatial region 160 is formed using a separate structure. Of course, the illustrated structure exemplifies a structure for forming the bridge 174 with a spacer member, but the gist of the present invention includes this method, and various modified embodiments that can implement an air layer under the diffusion plate are also of the present invention. It will fit the gist.

As shown in (d), as in (b) configuration of patterning the diffusion plate itself or configuration (c) using a separate structure, in addition to making the air layer a single layer, an independent air layer can be implemented. It is also possible to employ structures 175 and 176 to form spatial region 160 in a plurality of layers.

The lighting device according to the present invention as described above may implement the arrangement of the light source 130 emitting the light L as shown in FIG. 5 . That is, in order to reduce the number of light sources, the LED light source 130 may be disposed by applying a side-emitting LED.

The lighting device according to the present invention described above can be applied to an LCD through the following configuration and operation. Referring to FIG. 7 , light is emitted laterally from the side-emitting LED 130 , and the emitted light is reflected and diffused by the resin layer 140 formed instead of the structure of the conventional light guide plate, and the optical pattern layer 150 ) to prevent the concentration of light and minimize the deviation of light through the third spatial region formed under the diffuser plate. In particular, due to the presence of the reflective unit 120 according to the present invention disposed between the resin layer 140 and the printed circuit board 110 , the reflectance can be further improved, and the efficiency of light is maximized and the luminance is improved. can be implemented. In particular, in the case of the reflection unit 120 according to the present invention, the reflectance control can be implemented by variously changing the design for implementing the spatial area through the patterning of the adhesive material layer, and different depending on the material and type of the patterned adhesive material. There is also an effect that can adjust the reflectance and color implementation. Furthermore, it is possible to adjust the reflectance according to the optical characteristics and thickness of the second reflective film 122 .

In summary, the reflection efficiency of the light emitted by the reflection unit 120 and the reflection pattern 124 according to the present invention is further increased, so that the light can be guided forward. The light passing through the resin layer 140 is diffused or blocked through the optical pattern 151 formed on the optical pattern layer 150, and the purified light is an air gap module formed under the diffusion plate. The optical characteristics are refined once again, so that the uniformity can be increased, and white light is incident on the LCD panel through optical sheets such as the prism sheet 180 and DBEF 190 which are added later.

As such, in the case of the lighting device according to the present invention, the reflection efficiency is maximized through the structure having the spatial area of the reflection unit, and the structure of the light guide plate is removed, the light source is applied to the side emission type LED, and the resin layer is used. By guiding the light through diffusion and reflection, it is possible to reduce the thickness and the number of light sources. On the other hand, it is possible to improve the optical properties by providing a reflective pattern, a light-shielding pattern, and a spatial region of the air gap module to control the problems of luminance degradation and uniformity due to the reduction of the light source.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications are possible without departing from the scope of the present invention. The technical spirit of the present invention should not be limited to the described embodiments of the present invention, and should be defined by the claims as well as the claims and equivalents.

110: printed circuit board
120: reflection unit
121: first reflective film (White PET)
122: second reflective film
123: spacer member
124: reflection pattern
130: light source
140: resin layer
150: optical pattern layer
151: optical pattern
152: second spatial area
153: adhesive layer
160: third space area
170: diffuser plate
180: prism sheet
190: DBEF

Claims (15)

Board;
a light source disposed on the substrate and including a plurality of light emitting devices;
a reflection unit disposed on the substrate;
a resin layer disposed on the reflection unit and covering the light source; and
An optical pattern layer disposed on the resin layer,
The reflective unit includes a first film, a second film disposed spaced apart from the first film, and a plurality of first spatial regions disposed between the first film and the second film,
The first film and the second film include a plurality of holes through which each of the plurality of light emitting devices,
The optical pattern layer includes a first transparent film disposed on the resin layer, a second transparent film disposed to be spaced apart from the first transparent film, and a plurality of light blocking films disposed between the first transparent film and the second transparent film. a pattern and a plurality of second spatial regions disposed around the plurality of light blocking patterns,
A portion of the plurality of first spatial regions and a portion of the plurality of second spatial regions are vertically overlapping, and the number of the plurality of first spatial regions is greater than the number of the plurality of second spatial regions. .
delete According to claim 1,
The reflective unit includes a plurality of unit spacer members disposed between the first film and the second film,
Each of the plurality of first spatial regions is a lighting device disposed inside each of the plurality of unit spacer members.
Board;
a light source disposed on the substrate and including a plurality of light emitting devices;
a reflection unit disposed on the substrate;
a resin layer disposed on the reflection unit and covering the light source; and
An optical pattern layer disposed on the resin layer,
The reflective unit includes a first film, a second film disposed to be spaced apart from the first film, a spacer member disposed between the first film and the second film, and a plurality of first spatial regions formed in the spacer member including,
The first film and the second film include a plurality of holes through which each of the plurality of light emitting devices,
The optical pattern layer includes a first transparent film disposed on the resin layer, a second transparent film disposed to be spaced apart from the first transparent film, and a plurality of light blocking films disposed between the first transparent film and the second transparent film. including patterns;
The number of the plurality of first spatial regions is greater than the number of the plurality of light blocking patterns,
A lighting device in which a portion of the plurality of first spatial regions and a portion of the plurality of light blocking patterns overlap in a vertical direction.
5. The method of claim 4,
and the optical pattern layer includes a plurality of second spatial regions disposed around the plurality of light blocking patterns.
Board;
a light source disposed on the substrate and including a plurality of light emitting devices;
a reflection unit disposed on the substrate;
a resin layer disposed on the reflection unit and covering the light source; and
An optical pattern layer disposed on the resin layer,
The reflective unit includes a first film, a second film disposed to be spaced apart from the first film, and a spacer member disposed between the first film and the second film,
The spacer member includes a plurality of unit spacer members,
The first film and the second film include a plurality of holes through which each of the plurality of light emitting devices,
The optical pattern layer includes a first transparent film disposed on the resin layer, a second transparent film disposed to be spaced apart from the first transparent film, and a plurality of light blocking films disposed between the first transparent film and the second transparent film. including patterns;
The number of the plurality of unit spacing members is greater than the number of the plurality of light blocking patterns,
A lighting device in which a portion of the plurality of first spatial regions and a portion of the plurality of light blocking patterns overlap in a vertical direction.
7. The method of claim 6,
and the optical pattern layer includes a plurality of second spatial regions disposed around the plurality of light blocking patterns.
8. The method of claim 7,
The reflective unit includes a first spatial area disposed within the plurality of unit spaced members.
9. The method according to any one of claims 1, 3 to 8,
The number of the plurality of light blocking patterns is the same as the number of the plurality of light emitting devices.
9. The method of any one of claims 1, 3, 5, 7 and 8,
The number of the plurality of second spatial regions is the same as the number of the light emitting devices.
11. The method of claim 10,
The second spatial region is a lighting device disposed to surround a periphery of the light blocking pattern.
11. The method of claim 10,
The plurality of second spatial regions are regularly arranged.
9. The method of any one of claims 1, 3, 5, 7 and 8,
The optical pattern layer includes an adhesive layer disposed between the first transparent film and the second transparent film,
The second spatial region is disposed between the adhesive layer and the light blocking pattern.
14. The method of claim 13,
The light blocking pattern is disposed to be spaced apart from the adhesive layer by the second spatial region.
9. The method according to any one of claims 1, 3 to 8,
The first film is a reflective material and the second film is a film of a transparent material.

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