KR20090032825A - Lighting apparatus - Google Patents

Lighting apparatus Download PDF

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Publication number
KR20090032825A
KR20090032825A KR1020070098370A KR20070098370A KR20090032825A KR 20090032825 A KR20090032825 A KR 20090032825A KR 1020070098370 A KR1020070098370 A KR 1020070098370A KR 20070098370 A KR20070098370 A KR 20070098370A KR 20090032825 A KR20090032825 A KR 20090032825A
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KR
South Korea
Prior art keywords
light
guide plate
light source
light guide
embodiment
Prior art date
Application number
KR1020070098370A
Other languages
Korean (ko)
Other versions
KR100915465B1 (en
Inventor
강기욱
고영욱
손충용
홍승식
Original Assignee
(주) 이지닉스
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Priority to KR1020070098370A priority Critical patent/KR100915465B1/en
Publication of KR20090032825A publication Critical patent/KR20090032825A/en
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Publication of KR100915465B1 publication Critical patent/KR100915465B1/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031Reflecting element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133524Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating, or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side

Abstract

A light source device is disclosed. A light source device comprising a first light guide plate, a second light guide plate stacked on the first light guide plate, a reflector plate stacked on the second light guide plate, and a light source optically coupled to the side surfaces of the first and second light guide plates. The loss can be reduced.

Description

Light source apparatus

The present invention relates to a light source device using the LED.

As a light source used for a backlight unit or a lighting device, a light source device using LED is mainly used. Recently, there are attempts to provide various types of emotional lighting by adjusting the color temperature of such a light source device.

1A is a cross-sectional view of a light source device according to the prior art. The reflection plate 12 is disposed on one surface of one light guide plate 11, and the light guide plate 11 is formed with a pattern 17 to evenly reflect light. In addition, the diffusion film 13 and the diffusion plate 14 are sequentially stacked on the other surface of the light guide plate 11. The first light source 15a and the second light source 15b are positioned on the side of the light guide plate 11 to emit light 16a and 16b into the light guide plate 11. The emitted light 16a, 16b collides with the pattern 17 of the light guide plate and is emitted to the outside when it exceeds the angle of total reflection.

Table 1 of FIG. 1B is a table in which illuminance of the first light source 15a and the second light source 15b is measured. In Experiment 1, when only the first light source 15a is turned on without being combined with a lighting device, when only the second light source 15b is turned on, when the first and second light sources 15a and 15b are turned on together, Dividing is to measure the roughness. Experiment 2 is a case where only the first light source 15a is turned on in the situation of combining with the light source device of FIG. 1A, when only the second light source 15b is turned on, and the first and second light sources 15a and 15b are turned on together. The roughness is measured by dividing by. White LEDs were selected as the first and second light sources 15a and 15b.

As a result of the experiment, in Experiment 1, when only the first light source 15a is turned on, 750 lx, when only the second light source 15b is turned on, 760 lx, when the first and second light sources 15a and 15b are turned on 1490 lx was measured. On the other hand, in Experiment 2, when only the first light source 15a is turned on after the first light source 15a and the second light source 15b are coupled to the light source device, 640 lx and 660 lx when only the second light source 15b is turned on. 1300 lx was measured when the first and second light sources 15a and 15b were turned on.

The difference between Experiment 1 and Experiment 2 shows 110 lx when only the first light source 15a is turned on and 100 lx when only the second light source 15b is turned on, and turns on the first and second light sources 15a and 15b. The case showed a difference of 190 lx. The reason why the values of Experiment 1 and Experiment 2 are different from each other is that light 16a and 16b emitted from the first light source 15a and the second light source 15b are emitted through the light guide plate 11 in Experiment 2. to be. In particular, the light 16a, 16b emitted to the light guide plate 11 passes through several dozen total reflections in some cases in order to be emitted to the outside as shown in FIG. 1A. In this case, the movement path of the light in the light guide plate 11 is long, so that the light guide plate 11 absorbs a part of the light 16a and 16b, so that the light 16a and 16b emitted to the outside is reduced in illuminance.

In addition, when the first light source 15a and the second light source 15b are disposed vertically as shown in FIG. 1A, the thickness of the light guide plate 11 is inevitably increased. As a result, the loss of light is inevitable in the conventional light guide plate 11 structure. On the other hand, even if the light guide plate 11 is to be arranged in a multi-layered light source of two or more layers, the light guide plate 11 has a limit in forming a predetermined thickness or more in the manufacturing method.

The present invention is to provide a light source device that can minimize the loss of light even when the first light source and the second light source are disposed vertically.

Another object of the present invention is to provide an illumination light source device having various shapes of a first LGP and a second LGP when using a multilayer LGP in an illumination system.

According to an aspect of the present invention, a first light guide plate, a second light guide plate stacked on the first light guide plate, a reflective plate stacked on the second light guide plate, and a light source optically coupled to the side of the first and second light guide plate A light source device is provided.

The light source may include a first light source optically coupled to a side of the first light guide plate, and a second light source optically coupled to a side of the second light guide plate. The first light emitted from the first light source and the second light emitted from the second light source may have different wavelengths. The first light excitation film may be interposed in the path of the first light. A second optical excitation film may be interposed in the path of the second light.

The optical excitation film may include a resin layer in which phosphors are evenly dispersed, and a protective film laminated on both surfaces of the resin layer.

The first LGP and the second LGP may have different shapes. Through these different shapes, various lightings can be implemented.

A first pattern is formed on a surface of the first LGP in contact with the second LGP.

In addition, a second pattern may be formed on a surface of the second light guide plate in contact with the reflective plate.

According to the embodiment having the above configuration, by using a plurality of light guide plates, the amount of light loss in the light guide plate can be reduced. In addition, by varying the shape of the light guide plate, it is possible to produce various types of illumination. In addition, light of various wavelengths may be emitted to the outside by using an optical excitation film.

Hereinafter, a preferred embodiment of a light source device 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 will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

2A is a cross-sectional view of a light source device according to a first embodiment of the present invention, and FIG. 2B is a table showing illuminance of the light source device according to the first embodiment of the present invention. 2A and 2B, a first light guide plate 21a, a second light guide plate 21b, a reflector plate 22, a diffusion film 23, a diffusion plate 24, a first light source 25a, and a second light source 25b, first light 26a, second light 26b, first pattern 27a, and second pattern 27b are shown.

The first pattern 27a is formed on one surface of the first LGP 21a so that the first light 26a emitted into the first LGP 21a may be evenly emitted to the outside. The second light guide plate 21b is stacked on the upper surface of the first pattern 27a. The second pattern 27b is formed on the surface of the second light guide plate 21b not in contact with the first light guide plate 21a. The second pattern 27b serves to evenly emit the second light 26b emitted into the second light guide plate 21b to the outside. The first light guide plate 21a and the second light guide plate 21b are made of a transparent resin, and the manufacturing method may be printed by silk screen printing.

The diffusion film 23 may be stacked on the other surface of the first light guide plate 21a not in contact with the second light guide plate 21b, and the diffusion plate 24 may be stacked on the diffusion film 23. The diffusion film 23 and the diffusion plate 24 allow the first and second lights 26a and 26b to be evenly emitted to the outside.

In addition, the reflecting plate 22 is laminated in contact with the second pattern 27b formed on the second light guide plate 21b. The reflecting plate 22 reflects the first and second lights 26a and 26b to prevent them from escaping to the outside.

The first light source 25a is positioned on the side of the first light guide plate 21a. The first light source 25a emits the first light 26a into the first light guide plate 21a. LED is generally used as the first light source 25a, but any device capable of emitting light may be the first light source 25a. The first light source 25a and the first light guide plate 21a are optically coupled. Here, the term "optically coupled" means that the first light 26a emitted from the first light source 25a is coupled to be incident into the first light guide plate 21a.

The second light source 25b is positioned on the side of the second light guide plate 21b. The second light source 25b emits the second light 26b into the second light guide plate 21b. The second light source 25b is also commonly used as an LED, and may be another device for emitting light.

When the first light source 25a and the second light source 25b are disposed vertically, only the first light source 25b may be disposed on the side surface of the first light guide plate 21a, and the first light source 25a may be disposed on the side surface of the second light guide plate 21b. Since only two light sources 25b can be disposed, there is an advantage that a large number of light sources can be disposed.

Referring to the movement paths of the first light 26a and the second light 26b illustrated in FIG. 2A, the first light 26a may be emitted from the first light source 25a and immediately emitted to the outside. However, when exiting at the totally reflected angle, the total internal reflection occurs several times inside the first light guide plate 21a and then exits to the outside. At this time, as the total reflection increases, the light amount of the first light 26a decreases. This phenomenon is a phenomenon in which the second light 26b also occurs in the second light guide plate 21b.

In order to reduce the moving path of the first light 26a in the first light guide plate 21a, it is important to reduce the number of total reflections or to reduce the thickness of the first light guide plate 21b. This is because the amount of absorption of the first light 26a from the inside of the first LGP 21a is proportional to the moving distance of the first light 26a in the first LGP 21a, and the moving distance is the total number of reflections and the first LGP. This is because it is proportional to the thickness of 21b. This phenomenon occurs even after the second light 26b is emitted to the second light guide plate 21b. In the present embodiment, the thickness of the first light guide plate 21a is thinner than that of the light guide plate 11 of FIG. 1A. Therefore, the moving distance of the first light 26a is shorter than the first light 16a of FIG. 1A.

2B is a result of measuring illuminance using two light guide plates 21a and 21b as shown in FIG. 2A. In the table, Experiment 3 is a value measured by separating the first light source 25a and the second light source 25b in the light source device 20 of the present embodiment, and Experiment 4 is a first light source in the light source device 20 of the present embodiment. It is the value measured in the state which 25a and the 2nd light source 25b were combined. Each illuminance was measured at a distance of 1 m.

Experiment 3 is the same value as Experiment 1 of FIG. 1B. Because they used the same light sources. In Experiment 4, 710 lx when only the first light source 25a was turned on, 730 lx when only the second light source 25b was turned on, and 1435 lx when both the first and second light sources were turned on. Compared with Experiment 2 of FIG. 1B, when only the first light source 25a was turned on, the difference was 70 lx, and when the second light source 25b was turned on, the difference was 70 lx. In both cases, there was a difference of 135 lx. The reason why the value of Experiment 4 is all higher than that of Experiment 2 is that the light source device 20 of the present embodiment uses two thin light guide plates 21a and 21b to reduce the movement paths of the lights 26a and 26b. to be.

3A is a cross-sectional view of a light source device according to a second embodiment of the present invention, and FIG. 3B is a cross-sectional view of an optical excitation film according to a second embodiment of the present invention. 3A and 3B, the first light guide plate 31a, the second light guide plate 31b, the reflecting plate 32, the diffusion film 33, the diffusion plate 34, the first light source 35a, and the second light source 35b, first light 36a, second light 36b, first pattern 37a, second pattern 37b, photoexcitation film 38, phosphor 38a, resin layer 38b, The protective film 38c is shown.

This embodiment is generally the same as the embodiment of FIG. 2A. Therefore, the explanation focuses on the differences. In this embodiment, the optical excitation film 38 is interposed on the path through which the second light 36b of the second light source 35b enters the second light guide plate 31b.

As shown in FIG. 3B, the photoexcitation film 38 includes a phosphor 38a inside the transparent resin layer 38b. The phosphor 38a serves to absorb the wavelength of the second light 36b and convert it to another wavelength. For example, when the blue wavelength passes through the phosphor 38a, it is converted into a wavelength band such as red or green. That is, the wavelength to be converted also varies depending on which phosphor 38a is used. If the second light source 35b is a blue LED, the blue second light 36b emitted from the second light source 35b may be converted into a red wavelength at the moment of passing through the red phosphor 38a. On the other hand, since some of the phosphor 38a may be exposed to the outside of the resin layer 38b, the protective film 38c for protecting it may be laminated on both sides of the resin 38b. This is because the phosphor 38a is often composed of an organic material, because the organic material is poor in moisture resistance and heat resistance and easily deteriorates.

The protective film 38c protects the phosphor 38a from the external environment, thereby increasing the reliability of the optical excitation 38. As the resin that can be used as the protective film 38c, a colorless transparent synthetic resin is used, which is excellent in light transmittance, but is not particularly limited, for example, polyethylene terephthalate (PET), polyethylene naphthalate (polyethylene naphthalate). ), Acrylic resin, polycarbonate, polystyrene, and the like.

The above-described optical excitation film 38 can be variously changed according to the type of phosphor 38a, and by using such various optical excitation film 38, the color of light emitted to the outside of the light source device 30 can be converted. . In the present exemplary embodiment, light sources of various colors may be manufactured by different wavelengths of the first light 36a and the second light 36b. In particular, by appropriately controlling the first light source (35a) and the second light source (35b) it is possible to implement the emotional lighting that changes color with time.

4 is a perspective view of a light guide plate according to a third embodiment of the present invention, FIG. 5 is a perspective view of a light guide plate according to a fourth embodiment of the present invention, and FIG. 6 is a perspective view of a light guide plate according to a fifth embodiment of the present invention. . 4 to 6, first light guide plates 41a, 51a, and 61a and second light guide plates 41b, 51b, and 61b are illustrated. The light guide plates 41a and 41b of this embodiment have different shapes. The first light guide plate 41a has a right triangle shape, and the second light guide plate 41b has a rectangular shape. As such, when the shapes of the first LGP 41a and the second LGP 41b are different, various types of light source devices may be implemented. For example, when the first light guide plate 41a and the second light guide plate 41b are applied to the light source device of FIG. 2A, when only the first light source 25a is turned on, the light source device 20 having a monochrome right angle triangle shape is used. When only the second light source 25b is turned on, the light source device 20 has a monochromatic rectangular shape. In addition, when both the first light source 25a and the second light source 25b are turned on, the light source device 20 has two right triangle shapes.

The shape of the light guide plate may be variously modified. As shown in FIG. 5, the shape of the first light guide plate 51a may be smaller than that of the second light guide plate 51b, and the end of the first light guide plate 61a may be wave-retained as shown in FIG. 6.

As shown in the embodiments of FIGS. 4 to 6, the lighting of various shapes may be realized by modifying the shape of the first LGP and disposing different light sources on the first LGP and the second LGP. When used as a light source, such a light source enhances aesthetics.

7 is a cross-sectional view of a light source device according to a sixth embodiment of the present invention. Referring to FIG. 7, the first light guide plate 71a, the second light guide plate 71b, the reflecting plate 72, the diffusion film 73, the diffusion plate 74, the first light source 75a, and the second light source 75b. , First light 76a, second light 76b, first pattern 77a, second pattern 77b, and photoexcitation film 78 are shown.

This embodiment is generally the same as the embodiment of FIG. 3A. Therefore, the differences are described mainly. In this embodiment, the position where the optical excitation film 78 is interposed is different from the embodiment of Fig. 3A. The optical excitation film 78 of the present embodiment is disposed between the first light guide plate 71a and the second light guide plate 71b. It is characterized by being interposed. The optical excitation film 78 is positioned on the path of the first light 76a to convert the wavelength of the first light 76a.

8 is a cross-sectional view of a light source device according to a seventh embodiment of the present invention. Referring to FIG. 8, the first light guide plate 81a, the second light guide plate 81b, the reflector plate 82, the diffusion film 83, the diffusion plate 84, the first light source 85a, and the second light source 85b , First light 86a, second light 86b, first pattern 87a, second pattern 87b, first light excitation film 88a, second light excitation film 88b are shown. .

In the present embodiment, it is generally the same as the embodiment of FIG. 7. In the present embodiment, the first photoexcitation film 88a is positioned between the diffusion film 83 and the first light guide plate 81a. The second light excitation film 88b is interposed between the first light guide plate 81a and the second light guide plate 81b. As a result, the first light excitation film 88a is positioned on the path of the first light 86a and the second light 86b, and the second light excitation film 88b is on the path of the first light 86a. It is located at. Various types of light source devices 80 may be implemented using the first and second photoexcitation films 88a and 88b. This embodiment shows that the optical excitation film can be placed at various locations on the path of the first and second lights 86a and 86b.

9 is a cross-sectional view of a light source device according to an eighth embodiment of the present invention. The first light guide plate 91a, the second light guide plate 91b, the third light guide plate 91c, the reflector plate 92, the diffuser film 93, the diffuser plate 94, the first light source 95a, and the second light source 95b. , The third light source 95c, the first light 96a, the second light 96b, the third light 96c, the first pattern 97a, the second pattern 97b, the third pattern 93c, The first photoexcitation film 98a and the second photoexcitation film 98b are shown.

This embodiment is generally the same as the embodiment of FIG. 3A. Therefore, the explanation will be mainly focused on differences. This embodiment is characterized in that the light guide plate is increased by one more. That is, the 3rd light guide plate 91c is laminated | stacked on the 2nd light guide plate 91b, and the 3rd light source 95c is arrange | positioned at the side surface of the 3rd light guide plate 91c. Meanwhile, the second light excitation film 98b may be interposed between the third light source 95c and the third light guide plate 91c. In this way, by stacking the light guide plate of the multilayer it is possible to increase the amount of light. This is a solution to the disadvantage of not being able to form one light guide plate thickly.

10 is a cross-sectional view of a light source device according to a ninth embodiment of the present invention. Referring to FIG. 10, the first light guide plate 121a, the second light guide plate 121b, the reflecting plate 122, the diffusion film 123, the diffusion plate 124, the light source 125, the first light 126a, and the first light guide plate 121a are formed. Two light 126b, first pattern 127a, and second pattern 127b are shown.

In the present exemplary embodiment, one light source 125 is disposed between the first LGP 121a and the second LGP 121b. The light source emitted from the light source 125 is divided into a first light 126a incident to the first light guide plate 121a and a second light 126b emitted to the second light guide plate 121b. The first light 126a emits total reflection from the first light guide plate 121b and then exits to the outside, and the second light 126b emits total reflection from the second light guide plate 121b and then exits to the outside. Since each light 126a and 126b causes total reflection at each of the light guide plates 121a and 121b, the movement path is shorter in the light guide plates 121a and 121b until it is emitted to the outside. Therefore, the loss of light amount can be reduced.

Although the technical spirit of the present invention has been described in detail according to the above-described embodiments, the above-described embodiments are for the purpose of description and not of limitation, and a person of ordinary skill in the art will appreciate It will be understood that various embodiments are possible within the scope.

1A is a cross-sectional view of a light source device according to the prior art.

1B is a table showing illuminance of a light source device according to the prior art;

2A is a cross-sectional view of a light source device according to a first embodiment of the present invention.

2B is a table showing illuminance of the light source device according to the first embodiment of the present invention.

3A is a sectional view of a light source device according to a second embodiment of the present invention.

3B is a cross-sectional view of a photoexcitation film according to a second embodiment of the present invention.

4 is a perspective view of a light guide plate according to a third embodiment of the present invention;

5 is a perspective view of a light guide plate according to a fourth embodiment of the present invention.

6 is a perspective view of a light guide plate according to a fifth embodiment of the present invention;

7 is a sectional view of a light source device according to a sixth embodiment of the present invention.

8 is a sectional view of a light source device according to a seventh embodiment of the present invention;

9 is a sectional view of a light source device according to an eighth embodiment of the invention;

10 is a sectional view of a light source device according to a ninth embodiment of the present invention;

<Description of the symbols for the main parts of the drawings>

21a: first light guide plate 21b: second light guide plate

22: reflector 23: diffusion film

24: diffuser plate 25a: first light source

25b: second light source 26a: first light

26b: second light 27a: first pattern

27b: second pattern

Claims (8)

  1. A first light guide plate;
    A second light guide plate laminated on the first light guide plate;
    A reflection plate stacked on the second light guide plate;
    And a light source optically coupled to side surfaces of the first and second light guide plates.
  2. The method of claim 1,
    The light source is,
    A first light source optically coupled to a side of the first light guide plate;
    And a second light source optically coupled to a side of the second light guide plate.
  3. The method of claim 2,
    The light source device of claim 1, wherein the first light emitted from the first light source and the second light emitted from the second light source have different wavelengths.
  4. The method of claim 3,
    The first light excitation film is interposed in the path of the first light, characterized in that the light source device.
  5. The method of claim 4, wherein
    The first photoexcitation film,
    A resin layer in which phosphors are evenly dispersed;
    Light source device comprising a protective film laminated on both sides of the resin layer.
  6. The method of claim 3,
    And a second optical excitation film is interposed in the path of the second light.
  7. The method of claim 1,
    The first light guide plate and the second light guide plate have a shape different from each other.
  8. The method of claim 1,
    A first pattern is formed on a surface of the first light guide plate in contact with the second light guide plate, and a second pattern is formed on a surface of the second light guide plate in contact with the reflective plate.
KR1020070098370A 2007-09-28 2007-09-28 Lighting apparatus KR100915465B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110113702A (en) * 2010-04-10 2011-10-18 엘지이노텍 주식회사 Light source device
KR20110113703A (en) * 2010-04-10 2011-10-18 엘지이노텍 주식회사 Light source device
WO2016197436A1 (en) * 2015-06-08 2016-12-15 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device
US9541695B2 (en) 2010-04-10 2017-01-10 Lg Innotek Co., Ltd. Light source device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3452137B2 (en) * 2001-02-09 2003-09-29 オムロン株式会社 Light guide plate body, the surface light source device, an image display device, a cellular phone, and an information terminal
KR100947527B1 (en) * 2003-05-30 2010-03-12 삼성전자주식회사 Liquid crystal display apparatus
US20060268537A1 (en) * 2005-05-31 2006-11-30 Makoto Kurihara Phosphor film, lighting device using the same, and display device

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* Cited by examiner, † Cited by third party
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KR20110113702A (en) * 2010-04-10 2011-10-18 엘지이노텍 주식회사 Light source device
KR20110113703A (en) * 2010-04-10 2011-10-18 엘지이노텍 주식회사 Light source device
US9541695B2 (en) 2010-04-10 2017-01-10 Lg Innotek Co., Ltd. Light source device
WO2016197436A1 (en) * 2015-06-08 2016-12-15 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device

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