CN108732675A - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN108732675A CN108732675A CN201810161055.9A CN201810161055A CN108732675A CN 108732675 A CN108732675 A CN 108732675A CN 201810161055 A CN201810161055 A CN 201810161055A CN 108732675 A CN108732675 A CN 108732675A
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- mentioned
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- light
- interarea
- lighting device
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means 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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means 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
- G02B6/0031—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/01—Devices 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
- G02F1/13—Devices 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Abstract
Lighting device in relation to an embodiment has light guide plate, the 1st light source and multiple prisms.Above-mentioned light guide plate have the 1st interarea and above-mentioned 1st interarea opposite side and include multiple faces the 2nd interarea.Above-mentioned 1st light source irradiates laser along the 1st direction of illumination.Above-mentioned multiple prisms are arranged at above-mentioned 2nd interarea.Above-mentioned laser regards middle to the traveling of the 1st direction of travel in plane.Above-mentioned 2nd interarea has the 1st region and the 2nd region being arranged in order along above-mentioned 1st direction of travel, the light that above-mentioned 1st light source is sent out incident to above-mentioned 1st region.Above-mentioned multiple prisms include multiple 1st prisms in above-mentioned 2nd region.It is elongated with the sequence in above-mentioned 1st region and above-mentioned 2nd region at a distance from above-mentioned 1st interarea in section view.Above-mentioned 1st direction of illumination is tilted relative to above-mentioned 1st interarea.
Description
Pertinent literature it is cross-referenced
The Japanese patent application 2017-082901 CLAIM OF PRIORITYs that the application was proposed based on April 19th, 2017,
Entire contents incorporated herein.
Technical field
Embodiments of the present invention are related to lighting device.
Background technology
For example, the display device of liquid crystal display device etc. has display panel with pixel and by display panel illumination
Backlight etc. lighting device.Lighting device has the light guide plate of the light source for sending out light and the illuminated light from the light source.
Light from light source is incident on light guide plate from side, is propagated in light guide plate, from penetrating for the interarea of the side for being equivalent to light guide plate
It projects.
But if the outside in the side of light guide plate configures light source, lighting device integrally becomes larger, display device it is tight
Gathering becomes difficult.
Existing technical literature
Patent document 1：Japanese Unexamined Patent Publication 2004-38108 bulletins
Patent document 2：Japanese Unexamined Patent Publication 2011-238484 bulletins
Invention content
The purpose of one mode of the disclosure is to provide a kind of lighting device for making size become smaller.
Lighting device in relation to an embodiment has light guide plate, the 1st light source and multiple prisms.Above-mentioned light guide plate has the
1 interarea and opposite side in above-mentioned 1st interarea and include multiple faces the 2nd interarea.Above-mentioned 1st light source is along the 1st irradiation side
To irradiation laser.Above-mentioned multiple prisms are arranged on above-mentioned 2nd interarea.Above-mentioned laser regards middle to the 1st direction of travel in plane
It advances.Above-mentioned 2nd interarea has the 1st region and the 2nd region being arranged in order along above-mentioned 1st direction of travel, above-mentioned 1st light source
The light sent out is incident to above-mentioned 1st region.Above-mentioned multiple prisms include multiple 1st prisms in above-mentioned 2nd region.It is cuing open
It is elongated with the sequence in above-mentioned 1st region and above-mentioned 2nd region at a distance from above-mentioned 1st interarea depending in.Above-mentioned 1st direction of illumination
It is tilted relative to above-mentioned 1st interarea.
Description of the drawings
Fig. 1 is the stereogram for the structure schematically for indicating the display device in relation to the 1st embodiment.
Fig. 2 is the sectional view schematically of the display device in relation to the 1st embodiment.
Fig. 3 is the plan view schematically of the lighting device in relation to the 1st embodiment.
Fig. 4 is the sectional view schematically of the light guide plate in relation to the 1st embodiment.
Fig. 5 is the sectional view schematically of a part for the lighting device in relation to the 1st embodiment.
Fig. 6 is the amplified sectional view of the 1st prism in relation to the 1st embodiment.
Fig. 7 is the amplified sectional view of the 2nd prism in relation to the 1st embodiment.
Fig. 8 is the figure for the Luminance Distribution for indicating the light guide plate in relation to comparative example.
Fig. 9 is the figure for the Luminance Distribution for indicating the light guide plate in relation to another comparative example.
Figure 10 is the sectional view schematically of the light guide plate of the related comparative example of Fig. 9.
Figure 11 is the figure of an example for the Luminance Distribution for indicating the light guide plate in relation to the 1st embodiment.
Figure 12 is the sectional view schematically of the lighting device in relation to the 2nd embodiment.
Figure 13 is the sectional view schematically of the lighting device in relation to the 3rd embodiment.
Figure 14 is the sectional view schematically of a part for the lighting device in relation to the 4th embodiment.
Figure 15 is the sectional view schematically of a part for the lighting device in relation to the 5th embodiment.
Figure 16 is the sectional view schematically of a part for the lighting device in relation to the 6th embodiment.
Figure 17 is the sectional view schematically of a part for the lighting device in relation to the 7th embodiment.
Figure 18 is the sectional view schematically of the lighting device in relation to the 8th embodiment.
Figure 19 is the sectional view schematically of a part for the lighting device in relation to the 9th embodiment.
Specific implementation mode
Some embodiments are illustrated with reference to attached drawing.
In addition, disclosure herein is only an example, about the suitable of the purport for being maintained for invention by those skilled in the art
When change it can be readily appreciated that, certainly within the scope of the present invention.In addition, attached drawing has that explanation is made to become more
The case where defining and being showed schematically compared with actual form, but be only an illustration, do not limit the explanation of the present invention.?
In each figure, the case where about the same or similar omitting elements label continuously configured.In addition, in this specification and Ge Tu
In, have and assigns identical mark for the inscape for playing same or similar function about above-mentioned element in the figure having shown that
Number and omit repeat detailed description the case where.
In addition, in the present specification " α includes A, B or C ", " α includes some of A, B and C ", " α includes from by A, B and C structure
At group in select one " performance be just not excluded for the case where α includes multiple combinations of A~C as long as no especially expressing.
In turn, these performances are also not excluded for the case where α includes other element.
In various embodiments, as an example of display device, the liquid crystal display device of open infiltration type.In addition, conduct
An example of lighting device, the backlight of open liquid crystal display device.But each embodiment does not interfere in various embodiments
Application of the thought of disclosed each technology for other kinds of display device or lighting device.As other kinds of aobvious
Showing device, it is assumed for example that have：Have and is also equipped with other than the function of infiltration type by external light reflection and by the reflected light for showing
The liquid crystal display device of the function for the reflection-type shown has MEMS (MEMS, Micro Electro Mechanical
System, MEMS) display device etc. of mechanical display panel that is functioned as optical element of shutter.As
Other kinds of lighting device, such as imagine the headlight etc. being configured in the front surface of display device.In addition, lighting device
The use different from the illumination of display device can be used on the way.
[the 1st embodiment]
Fig. 1 is the stereogram for the structure schematically for indicating the display device 1 in relation to the 1st embodiment.Display device 1
It such as can be used for smart phone, tablet computer terminal, mobile telephone, personal computer, radiovisor, vehicle-mounted dress
It sets, in the various devices of game station, wearable terminal etc..
Display device 1 has the driving IC cores of display panel 2, the lighting device 3 as backlight, driving display panel 2
Piece 4 and flexible circuit board FPC1, FPC2 that control signal is transmitted to display panel 2 and lighting device 3.For example, flexible circuit
Substrate FPC1, FPC2 are connected in the control module for the action for controlling the display panel 2 and lighting device 3.
Display panel 2 has the 1st substrate SUB1 (array substrate) and is opposite to the 2nd substrate SUB2 of the 1st substrate SUB1
(counter substrate).Display panel 2 has the display area DA of display image.Display panel 2 for example has in the DA of display area
It is arranged as rectangular multiple pixel PX.
Lighting device 3 has the 1st light source LS1, the 2nd light source LS2 and the light guide plate LG for being opposite to the 1st substrate SUB1.1st
Light source LS1 and the lower surface (the not face opposed with the 1st substrate SUB1) of light guide plate LG-end of side is opposed, the 2nd light source LS2
It is opposed with the end of another party of the lower surface (the not face opposed with the 1st substrate SUB1) of light guide plate LG.In Fig. 1 by each light source
LS1, LS2 respectively illustrate 1, but are indeed provided with multiple 1st light source LSI and multiple 2nd light source LS2 (with reference to Fig. 3).
As shown in Figure 1, defining the 1st direction X, the 2nd direction Y and the 3rd direction Z.All directions X, Y, Z are for example mutually orthogonal.?
In the present invention, by from the direction parallel with the 3rd direction Z display device 1 regarded for plane.In addition, will observation and X-Z plane
The section of parallel display device 1 is referred to as section view.In the example in fig 1, each substrate SUB1, SUB2 and light guide plate LG have along
The long side of 1st direction X and short side along the 2nd direction Y, plane regard under shape as rectangle.But each substrate SUB1,
It's not limited to that for the shape of SUB2 and light guide plate LG, can also be shape of the plane depending under be square or it is round etc. other
Shape.
Fig. 2 is the sectional view schematically of the display device 1 parallel with X-Z plane.Display panel 2 is also equipped with sealing element
SL and liquid crystal layer LC.Each substrate SUB1, SUB2 are bonded by sealing element SL.Liquid crystal layer LC is enclosed in sealing element SL and each
Between substrate SUB1, SUB2.
On the lower surface (face opposed with light guide plate LG) of the 1st substrate SUB1, the 1st polarizer PL1 is pasted.The 2nd
On the upper surface (the not face opposed with the 1st substrate SUB1) of substrate SUB2, the 2nd polarizer PL2 is pasted.Each polarizer PL1,
The polarizing axis of PL2 is mutually orthogonal.
2nd interarea 52 of opposite sides of the light guide plate LG with 1st interarea 51 opposed with display panel 2, the 1st interarea 51,
2nd side 54 of the opposite side of the 1st side 53 and the 1st side 53.53 side of the 1st side of 1st light source LSI and the 2nd interarea 52
End is opposed, and the 2nd light source LS2 is opposed with the end of 54 side of the 2nd side of the 2nd interarea 52.It can also be in the 1st light source LS1 and the 2nd
Between the end of 53 side of the 1st side of interarea 52 and between the end of 54 side of the 2nd side of the 2nd light source LS2 and the 2nd interarea 52
The optical element of lens etc. is also configured, the width and angle of the light from each light source LS1, LS2 are adjusted.
1st light source LS1 will possess the diffusion light of the diffusion centered on the 1st direction of illumination DL1 to the 1st of the 2nd interarea 52
The end of 53 side of side is nearby irradiated.2nd light source LS2 will possess the diffusion light of the diffusion centered on the 2nd direction of illumination DL2 to
The end of 54 side of the 2nd side of 2nd interarea 52 is nearby irradiated.Each direction of illumination DL1, DL2 are opposite for example on the 1st direction X
Direction, be respectively relative to the 1st interarea 51 and tilted on the 3rd direction Z.That is, in the present embodiment, in section view, the 1st irradiation
Direction DL1 and the 1st direction X are inconsistent.But in the case where plane regards, the 1st direction of illumination DL1 is consistent with the 1st direction X.Example
Luminous member of the lasing light emitter of the semiconductor laser of the laser after releasing polarisation as each light source LS1, LS2 can such as be used
Part.
Each light source LS1, LS2 can also have a plurality of light-emitting elements for the light for sending out respectively different color.For example, if each
Light source LS1, LS2 have 3 light-emitting components for sending out red, green, blue light respectively, then can obtain the mixed of these colors
Close the light of color (such as white).
Display device 1 has prismatic lens PS between display panel 2 and light guide plate LG.In turn, display device 1 is in prismatic lens
Has diffusion sheet DS (diffusion layer) between PS and display panel 2.For example, prismatic lens PS has and extends parallel to the 2nd direction Y
Multiple prisms.These prisms are for example formed on the lower surface (face opposed with light guide plate LG) of prismatic lens PS.But these
Prism can also be formed on the upper surface (face opposed with display panel 2) of prismatic lens PS.
In fig. 2, an example of the light path of the 1st light source LS1 light sent out is represented by dashed line, the 2nd light source LS2 is sent out
An example of the light path of light is indicated with single dotted broken line.End of the light that 1st light source LS1 is sent out from 53 side of the 1st side of the 2nd interarea 52
Into light guide plate LG, propagated in the light guide plate LG that exists while being reflected with each interarea 51,52, it is final to deviate the complete of the 1st interarea 51
Conditioned reflex and from the 1st interarea 51 project.The light that 2nd light source LS2 is sent out from the end of 54 side of the 2nd side of the 2nd interarea 52 into
Enter light guide plate LG, is propagated in the light guide plate LG that exists while being reflected on each interarea 51,52, it is final to deviate the complete of the 1st interarea 51
Conditioned reflex and from the 1st interarea 51 project.In this way, the 1st interarea 51 is equivalent to the outgoing plane of light injection.In such a configuration,
Since each direction of illumination DL1, DL2 are tilted relative to the 1st interarea 51, so the light that each lasing light emitter LS1, LS2 are sent out can be inhibited
It is not projected reflectingly from each side 54,53 directly by each interarea 51,52.That is, since laser is difficult to from the 1st side 53 or the 2nd side
Face 54 is nearby penetrated to outside, so the utilization ratio of laser improves.
The light projected from the 1st interarea 51 is transformed to the light substantial parallel with the 3rd direction Z by prismatic lens PS.Here, " with
Light substantial parallel 3rd direction Z ", is not only the light strictly parallel with the 3rd direction Z, also includes relative to the 3rd direction Z
Inclination is transformed to sufficiently small light by prismatic lens PS compared with when being projected from the 1st interarea 51.Each light source LS1, LS2 are come from from maintenance
Light polarisation viewpoint, the prism of preferably prismatic lens PS is formed on the lower surface.It has passed through the light quilt of prismatic lens PS
Diffusion sheet DS diffusions, are radiated on display panel 2.Even in the relatively narrow situation of the field angle for the light for having passed through prismatic lens PS,
By spreading light diffusion sheet DS, it can also expand field angle.
In addition, in the case of reaching display panel 2 in the state that the light from each light source LS1, LS2 is by abundant polarisation,
1st polarizer PL1 can also be omitted.In the case where the 1st polarizer PL1 is omitted, for example, by improve each substrate SUB1,
The translucency of SUB2, can obtain the background of display device 1 can penetrate the so-called transparent liquid crystal display device seen.
Fig. 3 is the plan view schematically of lighting device 3.In the example of the figure, along the 1st side 53 of light guide plate LG
The end (A1 in Fig. 3) of side arranges 8 the 1st light source LS1, along the end (in Fig. 3 of 54 side of the 2nd side of light guide plate LG
A5) arrange 8 the 2nd light source LS2.The intensity for the light that 1st light source LS1 is sent out highest in the 1st optical axis AX1 ', the 2nd light source
The intensity for the light that LS2 is sent out highest in the 2nd optical axis AX2 '.Thickness direction (the 3rd side of each light source LS1, LS2 in light guide plate LG
To Z) on it is Chong Die with the both ends of light guide plate LG.In the example in figure 2, each light source LS1, LS2's is all Chong Die with light guide plate LG,
But can also each light source LS1, LS2 a part it is Chong Die with light guide plate LG.
Each light source LS1, LS2 are as illustrated, mutually stagger and arrange on the 2nd direction Y.That is, the 1st light source LS1 is to the 1st
The 1st optical axis AX1 ' and the 2nd light source LS2 for the light that direction of travel DL1 ' (1st direction of illumination DL1 of the plane depending in) is sent out are to the 2nd
2nd optical axis AX2 ' of the light that direction of travel DL2 ' (2nd direction of illumination DL2 of the plane depending in) is sent out is mutually wrong on the 2nd direction Y
It opens.In addition, the 1st optical axis AX1 ' can also be on the 2nd direction Y consistent (alignment) with the 2nd optical axis AX2 '.
Fig. 4 is the sectional view schematically of the light guide plate LG parallel with X-Z plane.The 1st interarea 51 of light guide plate LG be with
Plane parallel 1st direction X and the 2nd direction Y.2nd interarea 52 includes multiple faces, has the 1st region A1, the 2nd region A2, the 3rd
Region A3, the 4th region A4 and the 5th region A5.As illustrated in plan view in fig. 3, the 1st region A1 is from the 2nd direction Y of light guide plate LG
One end over to the other end be located on the end of 53 side of the 1st side.1st region A1 is that the light that the 1st light source LS1 is sent out is opposite
In the incidence surface of light guide plate LG incidences.5th region A5 over to the other end is set from one end on the 2nd direction Y of light guide plate LG
On the end of 54 side of the 2nd side.5th region A5 is that the light that the 2nd light source LS2 is sent out enters light relative to light guide plate LG incidences
Face.2nd region A2, the 3rd region A3 and the 4th region A4 over to the other end are set from one end on the 2nd direction Y of light guide plate LG
Between the 1st region A1 and the 5th region A5.
1st region A1, the 2nd region A2, the 3rd region A3, the 4th region A4 and the 5th region A5 are successively along the 1st direction of travel
DL1 ' is arranged.As an example, on the 1st direction X, the width of the 1st region A1 is equal with the width of the 5th region A5, the 2nd region A2
Width it is equal with the width of the 4th region A4.In addition, on the 1st direction X, the width of the 3rd region A3 is than each region A2, A5
Width is small.But the width of each region A2, A4, A1, A5 can also be different, can also the width of the 3rd region A3 be each region
It is more than the width of A2, A4.
As shown in figure 4, the 1st region A1, the 2nd region A2, the 4th region A4 and the 5th region A5 incline relative to the 1st interarea 51
Tiltedly.3rd region A3 is parallel with the 1st interarea 51.Here " parallel ", including the 3rd region A3 is with than each region A1, A2, A4, A5 phase
The case where being tilted relative to the 1st interarea 51 for the fully small angle of 51 inclined angle of the 1st interarea is (real with the 1st interarea 51
(basic) parallel situation in matter).
Multiple prism P are equipped on the 2nd interarea 52.Multiple prism P includes multiple 1st ribs in the 2nd region A2
Mirror P1, multiple 2nd prism P2 in the 3rd region A3 and multiple 3rd prism P3 in the 4th region A4.Each prism
P1, P2, P3 extend on the 2nd direction Y.The cross sectional shape of 1st prism P1 is the same for example on the 2nd direction Y, but can also
It is different.It is also same about the 2nd prism P2 and the 3rd prism P3.
For example, the mutual shapes of the 1st prism P1 and the 2nd prism P2 are different.In addition, the 3rd prism P3 and the 2nd prism P2 are also mutual
Shape is different.1st prism P1 and the 3rd prism P3 can also be identical shape (including symmetrical shape).
For example, each 2 prism P2 of 1st prism P1 and Ge is configured at different densities.In addition, each 3rd prism P3 and each
2nd prism P2 is also configured at different densities.Each 3 prism P3 of 1st prism P1 and Ge can also be by with identical Density and distribution.
In section view, the line segment on the vertex for linking multiple 1st prism P1 is referred to as the 1st imaginary line VL1, multiple will be linked
The line segment on the vertex of 2 prism P2 is referred to as the 2nd imaginary line VL2, and the line segment on the vertex for linking multiple 3rd prism P3 is referred to as the 3rd vacation
Think line VL3.In the example in fig. 4, each imaginary line VL1, VL2, VL3 are straight lines.But each imaginary line VL1, VL2, VL3 were both
It can be bent at least partially, can also be curve-like.
1st region A1 is tilted relative to the 1st interarea 51 with the 1st angle, θ 1.1st imaginary line VL1 relative to the 1st interarea 51 with
2nd angle, θ 2 tilts.3rd imaginary line VL3 is tilted relative to the 1st interarea 51 with the 4th angle, θ 4.5th region A5 is relative to the 1st master
Face 51 is tilted with the 5th angle, θ 5.Each angle, θ 1, θ 2, θ 4, θ 5 are acute angles.As an example, the 1st angle, θ 1 and the 5th angle, θ 5 are real
(1 ≈ θ 5 of θ) (substantially) equal in matter, the 2nd angle, θ 2 and the 4th angle, θ 4 substantial (substantially) equal (2 ≈ θ 4 of θ).As
An example, each angle, θ 1, θ 5 are bigger (1 ≈ θ 5 of θ than each angle, θ 2, θ 4>θ2≈θ4).But the 1st angle, θ 1 and the 5th angle, θ 5 and the 2nd
Angle, θ 2 and the 4th angle, θ 4 can also be respectively different (2 ≠ θ of 1 ≠ θ of θ 5, θ 4).
2nd imaginary line VL2 is tilted relative to each imaginary line VL1, VL3.Formed by 2nd imaginary line VL2 and the 1st interarea 51
3 angle, θs 3 are smaller (θ 3 than each angle, θ 1, θ 2, θ 4, θ 5<θ1,θ2,θ4,θ5).In the example in fig. 4, the 2nd imaginary line VL2 and the 1st
Interarea 51 is parallel.Here " parallel " further includes and each angle, θ 1, θ 2, θ 4, θ 5 other than the case where the 2nd angle, θ 2 is zero
Compared to fully small situation (with 51 substantially (substantially) parallel situation of the 1st interarea).
Here, the thickness (the 1st region A1 is at a distance from the 1st interarea 51) of the light guide plate LG in the 1st region A1 is defined as
The thickness (the 2nd region A2 is at a distance from the 1st interarea 51) of light guide plate LG in 2nd region A2 is defined as D2, by the 3rd area by D1
The thickness (the 3rd region A3 is at a distance from the 1st interarea 51) of light guide plate LG in the A3 of domain is defined as D3, by leading in the 4th region A4
The thickness (the 4th region A4 is at a distance from the 1st interarea 51) of tabula rasa LG is defined as D4, by the thickness of the light guide plate LG in the 5th region A5
Degree (the 5th region A5 is at a distance from the 1st interarea 51) is defined as D5.Distance D1 is from the 1st side 53 towards the boundary of each region A1, A2
Become larger.Distance D2 becomes larger from the boundary of each region A1, A2 towards the boundary of each region A2, A3.Distance D5 is from 54 direction of the 2nd side
The boundary of each region A4, A5 become larger.Distance D4 becomes larger from the boundary of each region A4, A5 towards the boundary of each region A3, A4.Scheming
In 4 example, distance D3 is certain.
In such shape, distance D3 is longer (D3 than the distance D1 at any position of the 1st region A1>D1), than the 2nd
All long (the D3 of distance D2 at any position of region A2>D2).In addition, at any positions of the distance D3 than the 5th region A5 away from
(D3 all long from D5>D5), the distance D4 at any position than the 4th region A4 is long (D3>D4).
Fig. 5 is the sectional view for indicating the periphery amplification of the 1st region A1 of lighting device 3.By Fig. 5, illustrate the 1st light source
The relationship at the inclination angle for the light that LS1 is sent out and the tiltangleθ 1 of the 1st region A1 of light guide plate LG.In addition, the 1st rib of light guide plate LG
Mirror P1 is omitted in Figure 5.
The intensity of the light for the 1st direction of illumination DL1 that 1st light source LS1 is sent out is in the 1st optical axis AX1 highests, the 1st optical axis AX1 phases
1st interarea 51 is tilted with angle, φ.Most expanding to 51 side of the 1st interarea in the diffusion light (diffused light) that the 1st light source LS1 is sent out
Scattered light with incident angle α incidence and is refracted relative to the 1st region A1, is reflected to 51 incidence of the 1st interarea with incidence angle θ.
Here, angle, φ, angle [alpha] and angle, θ are all acute angles.Angle, θ is preferably the cirtical angle of total reflection degree θ on the 1st interarea 51r
Above angle.Cirtical angle of total reflection degree θrAccording to the refraction of the air of the outside of the refractive index n of light guide plate LG and light guide plate LG
Rate 1 is indicated with following formula (1).
Formula (1):θr=sin-1(1/n)
Angle, θ is cirtical angle of total reflection degree θrAbove angle, according to above-mentioned formula (1), angle, θ 1, angle [alpha], refractive index n,
It is indicated with following formula (2).
Formula (2):θ=θ 1+sin-1((l/n)sinα)≥θr
If formula (2) solved about α, indicated with following formula (3).
Formula (3):α≥sin-1(nsin(θr-θ1))
On the other hand, in the diffusion light that the 1st light source LS1 is sent out be diffused into the light away from 51 farthest side of the 1st interarea relative to
1st interarea 51 is tilted with angle beta.Angle beta and angle, θ 1 preferably meet following formula (4).
Formula (4)：β<θ1
If the inclination angle for the light that the 1st light source LS1 is sent out and the relationship of the tiltangleθ 1 of the 1st region A1 of light guide plate LG are full
Above-mentioned formula (2)~(4) of foot, the then light that preferably the 1st light source LS1 is sent out are transmitted in light guide plate LG by efficiency well.It closes
Inclination in the inclination angle for the light that the 2nd light source LS2 and the 5th region A5, the 2nd light source LS2 are sent out and the 5th region A5 of light guide plate LG
The relationship of angle θ 5 is preferably with the composition for meeting the same formula with above-mentioned formula (2)~(4) described above.
Fig. 6 is the amplified sectional view of the 1st prism P1.1st prism P1 has the 1st inclined surface 11 and the 2nd inclined surface 12,
Section is triangle.The angle of apex angle formed by each inclined surface 11,12 is θ a.The 2nd interarea 52 and the 1st in 2nd region A2
11 angulation of inclined surface is θ b.The 2nd interarea 52 and 12 angulation of the 2nd inclined surface in 2nd region A2 are θ c.1st
Width on the 1st direction X of prism P1 is Dp1, and the interval on the 1st direction X of the 1st adjacent prism P1 is Tp1.1st prism
The height of P1 is H1.
In the example of fig. 6, angle, θ a is obtuse angle, and angle, θ b, θ c are acute angle, θ a>θc>θ b are set up.As an example, the 1st
Inclined surface 11 is parallel with the 1st interarea 51.In the case, angle, θ b is equal with above-mentioned angle, θ 1.It is formed in the 2nd region
Each 1st prism P1 in A2 both can whole shapes it is identical, can also at least part of 1st prism P1 shape it is different.
About each 3rd prism P3 being formed in the 4th region A4, it may have same as the 1st prism P1 described above
Structure.
Region more the 1st prism P1 or the 3rd prism P3 can more increase the light projected from the 1st interarea 51.This
Outside, usually in the end of light guide plate, the brightness of outgoing plane is easy to decline.In view of these, as shown in figure 4, the 2nd region can also be made
The density of the 1st prism P1 in A2 increases from the boundary of each region A2, A3 towards the boundary of each region A1, A2.Equally, can also
The density of the 3rd prism P3 in the 4th region A4 is set to increase from the boundary of each region A3, A4 towards the boundary of each region A4, A5.
Here, the density of the 1st prism P1 can be defined as the quantity of the 1st prism P1 of such as per unit length.Alternatively, the
The density of 1 prism P1 can also be indicated with the ratio of the interval Tp1 of the width D p1 of the 1st prism P1 and the 1st adjacent prism P1.
Density about the 3rd prism P3 is also same.
In addition it is also possible to make the angle, θ a or height H1 of the apex angle of the 1st prism P1 from the boundary of each region A2, A3 towards respectively
The boundary of region A1, A2 increase.In this case as well, it is possible to which the density of the 1st prism P1 in the 2nd region A2 is made to be certain.
Equally, can also make the apex angle of the 3rd prism P3 angle or height from the boundary of each region A3, A4 towards each region
The boundary of A4, A5 increase.In this case as well, it is possible to which the density of the 3rd prism P3 in the 4th region A4 is made to become certain.
In addition, the adjustment of density described above, angle and height does not need to whole the 1st prism P1 and the centainly
3 prism P3 are applied as object.For example, in a part of each 1st prism P1, density, angle and height can also be different.
Equally, in a part of each 3rd prism P3, density, angle and height can also be different.
Fig. 7 is the amplified sectional view of the 2nd prism P2.2nd prism P2 has the 1st inclined surface 21 and the 2nd inclined surface 22,
Section is triangle.The angle of apex angle formed by each inclined surface 21,22 is θ d.The 2nd interarea 52 and the 1st in 3rd region A3
21 angulation of inclined surface is θ e.The 2nd interarea 52 and 22 angulation of the 2nd inclined surface in 3rd region A3 are θ f.2nd
Width on the 1st direction X of prism P2 is Dp2, and the interval on the 1st direction X of the 2nd adjacent prism P2 is Tp2.2nd prism
The height of P2 is H2.
In the example of fig. 7, angle, θ d is obtuse angle, and angle, θ e, θ f are acute angle, θ d>θ e, θ f are set up.Angle, θ e and angle, θ
F is, for example, identical angle (θ e=θ f).The angle, θ d and height H2 for each 2nd prism P2 being formed on the 3rd region A3 both may be used
It, can also be different at least part of each 2nd prism P2 with all identical.In addition, the density of each 2nd prism P2 both can be with
Be it is certain, can also be different at least part of each 2nd prism P2.
Here, the density of the 2nd prism P2 can be defined as the quantity of the 2nd prism P2 of such as per unit length.Alternatively, the
The density of 2 prism P2 can also be indicated with the ratio of the interval Tp2 of the width D p2 of the 2nd prism P2 and the 2nd adjacent prism P2.
The construction of light guide plate LG according to the present embodiment can inhibit the uneven luminance of the light projected from the 1st interarea 51,
The light of good Luminance Distribution is radiated on display panel 2.In addition, passing through the space configuration the 1st in the lower section of light guide plate LG
Light source LS1 can realize the miniaturization of lighting device 3 and display device 1 and narrowization of frame border region.Further, since the 1st
Direction of illumination DL1 and the 2nd direction of illumination DX2 are tilted relative to the 1st interarea 51, so the situation parallel with the 1st interarea 51 is compared,
Light is not easy to leak out in light guide plate LG, can improve the utilization ratio of light.Using Fig. 8 to Figure 11 to the effect of present embodiment into
Row explanation.
Fig. 8 is the figure of the Luminance Distribution for the outgoing plane for indicating the light guide plate LGA in relation to comparative example.Light guide plate LGA is time
And from one end of light source side (left side in figure) to the other end (right side in figure) thickness is centainly plate.That is, light guide plate LGA
Shape be equivalent to on light guide plate LG shown in Fig. 4 the 4th region A4, do not have the 1st region A1, the 2nd region A2, the 3rd area
The shape of domain A3, the 5th region A5.9 light sources along the left side in figure end arranged cells.In the comparative example, with from light source
It leaves and the brightness of outgoing plane increase.In the region closer away from light source, have occurred hi-lite and low-light level part along
The candy strip that 2nd direction Y is repeated.
Fig. 9 is the figure of the Luminance Distribution for the outgoing plane for indicating the light guide plate LGB in relation to another comparative example.Figure 10 is the leaded light
The sectional view schematically of plate LGB.As shown in Figure 10, light guide plate LGB is from left end towards the center C on the 1st direction X and thickness
The shape for increasing, reducing from center C towards right end and thickness.That is, the shape of light guide plate LGB is equivalent to shown in Fig. 4
The 1st region A1 on light guide plate LG, the 2nd region A2, the 4th region A4, the 5th region A5, the shape without the 3rd region A3.It is more
A light source LS is opposed with the 1st region A1 and the 5th region A5 difference and configures.In addition, configured with above-mentioned the on light guide plate LGB
1 prism P1 and the same prisms of the 3rd prism P3, but omit in Fig. 10.In addition, light source is configured with 5 in left end, match in right end
It is equipped with 4.
The light of the light source LS of the left end of light guide plate LGB is configured in mainly by the prismatic reflection of the 4th region A4 and from injection
It projects in face.In addition, be configured in the light of the light source LS of the right end of light guide plate LGB mainly by the prismatic reflection of the 2nd region A2 and from
Outgoing plane projects.Thus, as shown in figure 9, the brightness not occurred in the comparative example near light source as Fig. 8 declines.But
It is not easy to project from the surface of the near border by the light of the prismatic reflection of the near border of each region A2, A4, and from from the side
Boundary nearby positions away from injection.Due to this reason, (boundary of each region A2, A4 are attached near the center C on the 1st direction X
Closely), the brightness of outgoing plane is greatly reduced.
Figure 11 is the figure of the Luminance Distribution for the outgoing plane (the 1st interarea 51) for indicating the light guide plate LG in relation to present embodiment.
In the example of the figure, due to being equipped with the 3rd region A3 between each region A2, A4, so the brightness near center does not occur
Decline.That is, by the 2nd prism P2 of the 3rd region A3, the light from each light source LS1, LS2 is from the outgoing plane the (the 1st near center
Interarea 51) also project, so inhibiting uneven luminance as Fig. 9.
Present embodiment from the description above can be obtained good by the way that the 3rd region A3 is arranged on light guide plate LG
The Luminance Distribution of 1st interarea 51.In addition, by using the lighting device 3 for having such light guide plate LG, display dress can be improved
Set 1 display quality.
In addition to this, above-mentioned various effect appropriate can be obtained according to the present embodiment.
[the 2nd embodiment]
The 2nd embodiment is illustrated.About the structure and effect not mentioned especially, Fig. 4 with the 1st embodiment
Etc. being same.
Figure 12 is the figure for the structure schematically for indicating the lighting device 3 in relation to the 2nd embodiment.The lighting device 3 removes
Other than 1st light source LS1, the 2nd light source LS2 and light guide plate LG, it is also equipped with the 1st reflection component 60.1st reflection component 60 is, for example,
The plank (sheet material) being made of metal material, it is opposed with the 2nd interarea 52 of light guide plate LG.1st reflection component 60 will be from light guide plate
The light that the 2nd interarea 52 of LG leaks out is reflected towards light guide plate LG.In addition, the prisms on the 2nd interarea 52 are omitted.
1st reflection component 60 has and the 2nd opposed part 1s 61 of region A2, the part 2 opposed with the 3rd region A3
62 and the third portion 63 opposed with the 4th region A4.Part 1 61 is parallel with the 2nd region A2, part 2 62 and the 3rd region
A3 is parallel, and third portion 63 is parallel with the 4th region A4.
Even if can be obtained if in the case where the 3rd embodiment as shown in figure 12 is provided with the 1st reflection component 60 like that
To good Luminance Distribution in a same manner as in the first embodiment.In turn, provided with the 1st reflection component 60, due to can
The light leaked out from the 2nd interarea 52 of light guide plate LG is recycled, so the brightness of the 1st interarea 51 can be improved integrally.In addition,
Part 1 61, part 2 62 and third portion 63 can also be not parallel with the 2nd region A2, the 3rd region A3, the 4th region A4 respectively
Ground is formed.
[the 3rd embodiment]
The 3rd embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 13 is the sectional view schematically of the lighting device 3 in relation to the 3rd embodiment.The lighting device 3 has leaded light
Plate LG, the 1st light source LS1 and the 1st reflection component 60.Lighting device 3 does not have the 2nd light source LS2.The 2nd interarea 52 of light guide plate LG
With the 1st region A1, the 2nd region A2 and the 3rd region A3.It is omitted here diagram, but is formed with multiple in the 2nd region A2
1 prism P1, is formed with multiple 2nd prism P2 in the 3rd region A3.
The distance D1 of thickness as the light guide plate LG in the 1st region A1 is from the 1st side 53 towards the side of each region A1, A2
Boundary becomes larger.Equally, as the distance D2 of the thickness of the light guide plate LG in the 2nd region A2 from the side of the 1st region A1 and the 2nd region A2
The boundary of boundary towards the 2nd region A2 and the 3rd region A3 become larger.In the example of Figure 13, as the light guide plate LG in the 3rd region A3
The distance D3 of thickness be certain.In a same manner as in the first embodiment, any positions of the distance D3 than the 1st region A1, the 2nd region A2
All long (the D3 of distance D1, D2 at place>D1, D2).
1st reflection component 60 has the part 1 61 opposed with the 2nd region A2 and the opposed with the 3rd region A3 the 2nd
Part 62.Part 1 61 is parallel with the 2nd region A2, and part 2 62 is parallel with the 3rd region A3.In addition, part 1 61 and the 2nd
Region A2 can not also be parallel, and part 2 62 can not also be parallel with the 3rd region A3.
Lighting device 3 is also equipped with the 2nd reflection component 70.2nd reflection component 70 is, for example, the plank being made of metal material
(sheet material), it is opposed with the 2nd side 54 of light guide plate LG.2nd reflection component 70 is parallel with the 2nd side 54.
In fig. 13, an example of the light path of the 1st light source LS1 light sent out is represented by dashed line.What the 1st light source LS1 was sent out
Light enters light guide plate LG from the 1st region A1.If the 2nd region A2 is tilted as shown in Figure 13, which is shone with shallower angle
It penetrates on the 2nd region A2, so being not easy to deviate the total reflection condition of each interarea 51,52.Thus, the light on one side by each interarea 51,
52 reflections are propagated in light guide plate LG on one side, reach the 2nd side 54.The light can be projected from the 2nd side 54, but by the 2nd reflection
Component 70 reflects and incident to light guide plate LG again.The light of light guide plate LG has been returned to by the 1st prism P1 or the 2nd of the 1st region A1
The 2nd prism P2 reflections of region A2, deviate the total reflection condition of the 1st interarea 51 and are projected from the 1st interarea 51.
If in the case where being not provided with the 3rd region A3, the light reflected by the 2nd reflection component 70 is in the 1st side 53
Nearby more projected from the 1st interarea 51 etc., uneven luminance may occur on the 1st interarea 51.In contrast, equipped with the 3rd
In the case of the A3 of region, such uneven luminance can be inhibited in a same manner as in the first embodiment, make the Luminance Distribution of the 1st interarea 51
Uniformity improve.
[the 4th embodiment]
The 4th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 14 is the figure in the section schematically for the part for indicating the lighting device 3 in relation to the 4th embodiment.The illumination
Device 3 has light guide plate LG, the 1st light source LS1 and the 1st reflection component 60.In fig. 14, the diagram of prism P1 is omitted.Such as figure
Show that the 1st region A1 of the 2nd interarea 52 of light guide plate LG is the curved surface for being bent into lens-shaped like that.The curved surface is for example with diagram
Cross sectional shape extended parallel to the 2nd direction Y.1st region A1 with this configuration then passes through the 1st region A1 such as convex lenses
It functions like that, the angle of flare for the light that the 1st light source LS1 is sent out can be adjusted.
For example, when the 1st light source LS1 has a plurality of light-emitting elements for the light for sending out different colours respectively, there is each luminous member
The mutually different situation of the angle of flare of the light that part is sent out.At this point, also by the angle of flare of the light sent out corresponding to each light-emitting component
Come adjust the lens-shaped that the 1st region A1 has curved surface curvature, so as to adjust light that each light-emitting component is sent out
Angle of flare.Therefore, compared with the 1st embodiment, uneven color, the uneven luminance of the 1st interarea 51 can be further suppressed, makes
The uniformity of the Luminance Distribution of 1 interarea 51 improves.
In addition, about the 5th region A5 and the 2nd light source LS2, can also apply and disclosed 1st area in the present embodiment
Domain A1 and the same structures of the 1st light source LS1.
[the 5th embodiment]
The 5th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 15 is the figure in the section schematically for the part for indicating the lighting device 3 in relation to the 5th embodiment.The illumination
Device 3 has light guide plate LG, the 1st light source LS1 and the 1st reflection component 60.In fig.15, the diagram of prism P1 is omitted.1st light
Source LS1 has a plurality of light-emitting elements LS1-1~LS1-3 for the light for sending out different colours respectively.A plurality of light-emitting elements LS1-1,
LS1-2, LS1-3 are opposite to the 1st region A1 respectively, and from the 1st side 53 towards the 1st region A1, the 2nd region A2 boundary according to
The secondary inclined side along the 1st region A1 arranges.Each light-emitting component LS1-1~LS1-3 is for example with the cross sectional shape of diagram and the 2nd
Direction Y has been arranged in parallel multiple.
In general, the light of short wavelength, the absorptivity of the light of light guide plate LG are bigger.The wavelength of red, green, blue light
For indigo plant<It is green<It is red.Thus, the absorptivity of the light of light guide plate LG is indigo plant>It is green>It is red.In the shape of light guide plate LG shown in figure 15,
Length of the light that each light-emitting component LS1-1~LS1-3 is sent out by the light path of light guide plate LG is LS1-3<LS1-2<LS1-
1.So if it is considered that the absorption of the light in light guide plate LG, then preferably in section view, the shorter hair of the wavelength of the light sent out
Optical element is more configured in the 2nd region sides A2.That is, each light-emitting component LS1-1, LSI-2, LS1-3 for example preferably send out it is red
The red laser source of color laser, the green laser source for sending out green laser, the blue laser source for sending out blue laser.Each luminous member
In the case of the output difference of part LS1-1~LSI-3, can also will export it is maximum be set as light-emitting component LS1-1, will be defeated
Go out it is then larger be set as light-emitting component LS1-2, by output it is minimum be set as light-emitting component LS1-3.
If it is above structure, effect same as the respective embodiments described above can be also obtained.In addition, passing through such as this reality
It applies mode and configuration is changed according to the characteristic of each light-emitting component LS1-1~LS1-3 light sent out like that, so as to further
Uneven color, the uneven luminance for inhibiting the 1st interarea 51 make the uniformity of the Luminance Distribution of the 1st interarea 51 improve.
In addition, in fig.15, the quantity of a plurality of light-emitting elements opposed with the 1st region A1 is not limited to 3 in section view
It is a, it can also be 2 or 4, can also be 5 or more.
In addition, about the 5th region A5 and the 2nd light source LS2, can also apply and disclosed 1st area in the present embodiment
Domain A1 and the same structures of the 1st light source LS1.
[the 6th embodiment]
The 6th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 16 is the figure in the section schematically for the part for indicating the lighting device 3 in relation to the 6th embodiment.The illumination
Device 3 has light guide plate LG, the 1st light source LS1 and the 1st reflection component 60, is also equipped with the 3rd reflection component 80 and frame FM.Scheming
In 16, the diagram of prism P1 is omitted.Frame FM is for example formed by the metal material with light-proofness.Frame FM is for example by the 1st
The back side (52 side of the 2nd interarea) of light source LS1, light guide plate LG and the 1st light source LS1 and the 1st reflection component 60 is surrounded.
3rd reflection component 80 is, for example, reflection mirror component.The thickness of 1st light source LS1 and the 3rd reflection component 80 in light guide plate LG
It is Chong Die with the 1st region A1 on degree direction (the 3rd direction Z), it is configured in the space surrounded by light guide plate LG and frame FM.3rd
The light reflection that reflection component 80 sends out the 1st light source LS1 is irradiated to the 1st region A1 of light guide plate LG.
In figure 16, an example of the light path of the 1st light source LS1 light sent out is represented by dashed line.What the 1st light source LS1 was sent out
Light is reflected by the 3rd reflection component 80, to make light path be irradiated on the 1st region A1, one to the 1st direction of illumination DL1 deflectings
While being propagated in light guide plate LG on one side by the reflection of each interarea 51,52 of light guide plate LG.
If it is above structure, effect same as the respective embodiments described above can be also obtained.In addition, passing through such as this reality
It applies mode and uses the 3rd reflection component 80 like that, without making the 1st light source LS1 be tilted to the 1st direction of illumination DL1, pass through tune
The angle for saving the 1st reflection component 60, so as to easily adjust the direction of illumination of the light irradiated to the 1st region A1.In addition,
By using the 3rd reflection component 80 as in the present embodiment, to make the degree of freedom of the allocation position of the 1st light source LS1 get higher.
In addition, in the example of Figure 10, since the 1st light source LS1 and frame FM is contiguously configured, so becoming from the heat dissipation of the 1st light source LS1
It must be easier.
In addition, the 3rd reflection component 80 is either the light from the 1st light source LS1 is only reflected 1 time and to the 1st region A1
The construction of irradiation can also be the construction for reflecting for 2 times or more and being irradiated to the 1st region A1.
In addition, lighting device 3 can also have with the 1st light source LS1 it is arranged opposite, adjust the light that sends out of the 1st light source LS1
The collector lens of angle of flare.By using collector lens, the light so as to send out the 1st light source LS1 passes through the 3rd reflection component
80 correctly irradiate.
In addition, in the present embodiment in relation to the structure described near the 1st light source LS1, for the 2nd sides light source LS2
It can similarly apply.
[the 7th embodiment]
The 7th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 17 is the figure in the section schematically for the part for indicating the lighting device 3 in relation to the 7th embodiment.The illumination
Device 3 has light guide plate LG, the 1st light source LSI and the 1st reflection component 60, frame FM, is also equipped with bending part 90.
1st light source LS1 is Chong Die with the 2nd region A2 on the thickness direction (the 3rd direction Z) of light guide plate LG.Bending part 90
A part it is Chong Die with the 1st region A1 on the thickness direction (the 3rd direction Z) of light guide plate LG.1st light source LS1 and bending part
90 are configured in the space surrounded by light guide plate LG and frame FM.Bending part 90 shown in Figure 17 is in its section X-Z
Shape is triangle, and the prism extended on the 2nd direction Y.Specifically, bending part 90 has the 1st face 91, the 2nd face 92
With the 3rd face 93.As an example, bending part 90 can also for arranged on the 2nd direction Y as shown in Figure 3 multiple 1
Each 1st light source LS1 of light source LS1 respectively settings 1.In addition, bending part 90 can also set 2 or more the 1st light source LS1
Each 1 is set, 1 can also be arranged to the 1st whole light source LS1.
1st face 91 has incident area 91a and projects region 91b.Incident area 91a is opposed with the 1st light source LS1.It projects
Region 91b is opposed with the 1st region A1 of light guide plate LG.In the example of Figure 17, the 1st face 91 is tilted relative to the 3rd direction Z.2nd
Face 92 and the 3rd face 93 are relative to the 1st face 91 with defined angle tilt.2nd face 92 and 91 angulation of the 1st face and the 3rd face
93 both may be the same or different with 91 angulation of the 1st face.
The light that 1st light source LS1 is sent out is incident from incident area 91a to bending part 90.The light of the incidence is anti-by the 2nd face 92
It penetrates, and then is reflected by the 3rd face 93, projected from region 91b is projected.The light of the injection is irradiated onto along the 1st direction of illumination DL1 and leads
On the 1st side 53 of tabula rasa LG, propagated in the light guide plate LG that exists while being reflected by each interarea 51,52 of light guide plate LG.In this way,
In the present embodiment, the light path for the light that the 1st light source LS1 is sent out is bent by bending part 90 to the 1st direction of illumination DL1, guide
Tabula rasa LG is incident.
If it is above structure, effect same as the respective embodiments described above can be also obtained.In this configuration, pass through
Bending part 90 is used as in the present embodiment, can obtain effect in a same manner as in the sixth embodiment.
In addition, in the present embodiment in relation to the structure described near the 1st light source LS1, for the 2nd sides light source LS2
Also it can similarly apply.
[the 8th embodiment]
The 8th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 18 is the sectional view schematically of the lighting device 3 ' in relation to the 8th embodiment.The lighting device 3 ' is in section view
In have lighting device 3 shown in 3 Figure 12, by multiple lighting device 3 on the 1st direction X mutually be adjacent to configuration and structure
At.There is LG1~LG3 that 3 lighting devices 3 have the LG having with lighting device shown in Figure 12 3 similarly to construct.Illumination
The lighting device 3 of the cross sectional shape of diagram is for example mutually adjacent to configuration on the 2nd direction Y again and constituted by device 3 '.
If it is above structure, effect same as the respective embodiments described above can be also obtained.In addition, by will be smaller
Lighting device more than 3 be adjacent to configuration, the thickness of lighting device 3 ' can not be made to increase and constitute the lighting device 3 ' of large size.
In addition, in the lighting device 3 ' of such structure, by making 3 part of lighting device drive, the raising of contrast can be realized
And energy-saving technology.In addition, in lighting device 3 ', can be bent at the boundary part of adjacent lighting device 3, shape from
It is improved by degree.
In addition, in figure 18, illustrating that each lighting device 3 is adjacent on the 1st direction X configured with 3 in section view
Example, but not limited to this, can also be 2 or 4, can also be 5 or more.In addition, constituting the more of lighting device 3 '
A lighting device 3 is not limited to lighting device 3 shown in Figure 12, can be the lighting device 3 in relation to the respective embodiments described above
It is any, can also be the lighting device 3 in relation to mutually different embodiment.
[the 9th embodiment]
The 9th embodiment is illustrated.About the structure and effect not mentioned especially, it is with the respective embodiments described above
Similarly.
Figure 19 is the sectional view schematically of a part for the lighting device in relation to the 9th embodiment.It is shone shown in Figure 19
Bright device 3 is the variation of lighting device 3 ' shown in Figure 18, is to amplify the boundary part of 2 light guide plates LG1, LG2 to indicate
Figure.Lighting device 3 ' shown in Figure 19 does not have the 2nd light source LS2 compared with lighting device 3 ' shown in Figure 18, and has
4 reflection components 100.
1st light source LS1 and the 4th reflection component 100 are configured in 2 on the thickness direction (the 3rd direction Z) of light guide plate LG
On the boundary line of light guide plate LG1, LG2.Shape in its section X-Z of 4th reflection component 100 shown in Figure 17 is V shape, is
The reflection mirror component extended on the 2nd direction Y.Specifically, the 4th reflection component 100 has the 1st face 101 and the 2nd face 102.Make
As an example of, the 4th reflection component 100 can also be for each 1st light source of the multiple 1st light source LS1 arranged on the 2nd direction Y
LS1 respectively settings 1.In addition, the 4th reflection component 100 can also be to 2 or more the 1st each 1 of light source LS1 settings, it can also be right
The 1st whole light source LS1 are arranged 1.
In the example of Figure 19, the 1st face 101 relative to the 3rd direction Z with defined angle tilt, the light guide plate with a side
The 5th region A5 of LG1 is opposed.2nd face 102 relative to the 3rd direction Z with defined angle tilt, the light guide plate LG2 with another party
The 1st region A1 it is opposed.In addition, the 1st face 91 and the 2nd face 92 are also opposed with the 1st light source LS1.
In Figure 19, an example of the light path for the light that the 1st light source is sent out is represented by dashed line.The light that 1st light source LS1 is sent out exists
It is projected to the 3rd direction Z in example illustrated, is reflected by the 1st face 91 of the 4th reflection component 100 and the 2nd face 92.By the 1st face
101 reflections make on the 5th region A5 that light path deflecting is the light guide plate LG1 that the light of the 2nd direction of illumination DL2 is irradiated onto a side, one
While being propagated in light guide plate LG1 on one side by the reflection of each interarea 51,52 of light guide plate LG1.On the other hand, it reflected by the 2nd face, make light
The light that road deflecting is the 1st direction of illumination DL1 is irradiated by the 1st region A1 of from the light guide plate LG2 to another party, on one side by light guide plate LG
Each interarea 51,52 reflection on one side propagated in light guide plate LG2.
If it is above structure, effect same as the respective embodiments described above can be also obtained.In this configuration, with it is upper
Stating each embodiment and comparing can be such that the quantity of each light source LS1, LS2 reduces.Constitute multiple lighting devices 3 of lighting device 3 ' simultaneously
Lighting device 3 shown in Figure 12 are not limited to, can also be any of the lighting device in relation to the respective embodiments described above.Example
Such as, in the case where keeping the lighting device 3 with 2 structures same as lighting device shown in Figure 13 3 adjacent, can also be
Make it is adjacent in the 1st side 53 of light guide plate LG mode opposite each other, to have 1 the 1st light instead of 2 the 1st light source LS1
The structure of source LS1 and the 4th reflection component 100.
More than, based on the lighting device and display device illustrated as embodiments of the present invention, people in the art
As long as member can appropriately designed change and whole lighting devices and display device for implementing include the present invention purport, also belong to
The scope of the present invention.
In the scope of the technological thought of the present invention, if it is those skilled in the art institute it is conceivable that various modifications example,
About these variations it will be also be appreciated that belonging to the scope of the present invention.For example, those skilled in the art are to the respective embodiments described above
It has suitably carried out the form after the addition, deletion or design alteration of inscape or has carried out the addition, omission or item of process
The form of part change is included in as long as also having the purport of the present invention in the scope of the present invention.
Also, it is understood that about other function and effect caused by the technical solution described in various embodiments,
The content that the content or those skilled in the art that can be illustrated by the record of this specification can suitably be expected, certainly
Caused by the present invention.
Description of the drawings
1 display device；2 display panels；3 lighting devices；The 1st substrates of SUB1；The 2nd substrates of SUB2；LC liquid crystal layers；DA is shown
Region；LG light guide plates；PS prismatic lens；DS diffusion sheets；51 the 1st interareas；52 the 2nd interareas；53 the 1st sides；54 the 2nd sides；A1~
The the 1st~the 3rd regions A3；The the 1st~the 3rd prisms of P1~P3；The 1st light sources of LS1；The 2nd light sources of LS2；The the 1st~the 3rd imaginations of VL1~VL3
Line；60 the 1st reflection components；61~63 1~third portions；70 the 2nd reflection components；FM frames；80 the 3rd reflection components；90 bendings
Component；100 the 4th reflection components.
Claims (12)
1. a kind of lighting device,
Have：
Light guide plate, with the 1st interarea and above-mentioned 1st interarea opposite side and include multiple faces the 2nd interarea；
1st light source irradiates laser along the 1st direction of illumination；And
Multiple prisms are set to above-mentioned 2nd interarea；
Above-mentioned laser regards middle to the traveling of the 1st direction of travel in plane；
Above-mentioned 2nd interarea has the 1st region and the 2nd region being arranged in order along above-mentioned 1st direction of travel, above-mentioned 1st light source
The light sent out is incident to above-mentioned 1st region；
Above-mentioned multiple prisms are included in multiple 1st prisms in above-mentioned 2nd region；
It is elongated with above-mentioned 1st region, the sequence in above-mentioned 2nd region at a distance from above-mentioned 1st interarea in section view；
Above-mentioned 1st direction of illumination is tilted relative to above-mentioned 1st interarea.
2. lighting device as described in claim 1,
At least part of above-mentioned 1st light source is Chong Die with above-mentioned 1st region or above-mentioned 2nd region in plane regards.
3. lighting device as described in claim 1,
It is also equipped with the 1st reflection component；
The light that above-mentioned 1st light source is sent out makes light path deflecting be above-mentioned 1st irradiation side by being reflected by above-mentioned 1st reflection component
To by above-mentioned 1st area illumination.
4. lighting device as described in claim 1,
In section view, above-mentioned 1st region than by the 1st imaginary line of the vertex of above-mentioned multiple 1st prisms connection more relative to above-mentioned
1st interarea tilts.
5. lighting device as described in claim 1,
Above-mentioned 1st light source has a plurality of light-emitting elements；
In section view, above-mentioned a plurality of light-emitting elements are arranged along the inclined side in above-mentioned 1st region.
6. lighting device as claimed in claim 5,
Above-mentioned a plurality of light-emitting elements send out the light of mutually different wavelength；
In section view, above-mentioned 2nd area side is more being leaned in the shorter configuration of wavelength for the light that above-mentioned a plurality of light-emitting elements are sent out.
7. lighting device as described in claim 1,
Above-mentioned 1st region bends are convex.
8. lighting device as described in claim 1,
Above-mentioned 2nd interarea has above-mentioned 1st region, above-mentioned 2nd region, the 3rd area being arranged in order along above-mentioned 1st direction of travel
Domain；
Above-mentioned multiple prisms are included in multiple 2nd prisms in above-mentioned 3rd region；
In section view, with the sequence in above-mentioned 1st region, above-mentioned 2nd region and above-mentioned 3rd region at a distance from above-mentioned 1st interarea
It is elongated.
9. lighting device as claimed in claim 8,
Link the 1st of the 2nd imaginary line on the vertex of above-mentioned multiple 2nd prisms relative to the vertex for linking above-mentioned multiple 1st prisms
Imaginary line tilts.
10. lighting device as claimed in claim 8,
Have 2nd reflection component opposed with above-mentioned 2nd interarea；
Above-mentioned 2nd reflection component includes the part 1 opposed with above-mentioned 2nd region and the 2nd opposed with above-mentioned 3rd region
Point.
11. lighting device as claimed in claim 8,
Above-mentioned 2nd interarea has above-mentioned 1st region being arranged in order along above-mentioned 1st direction of travel, above-mentioned 2nd region, above-mentioned
3rd region, the 4th region and the 5th region；
Above-mentioned lighting device is also equipped with the 2nd light source to the above-mentioned 5th area illumination light of above-mentioned light guide plate；
Above-mentioned multiple prisms are included in multiple 3rd prisms in above-mentioned 4th region；
In section view, above-mentioned 5th region and the 3rd imagination for linking the vertex of above-mentioned multiple 3rd prisms in above-mentioned 4th region
Line is tilted relative to above-mentioned 1st interarea；
In section view, with the sequence in above-mentioned 5th region, above-mentioned 4th region and above-mentioned 3rd region at a distance from above-mentioned 1st interarea
It is elongated.
12. a kind of lighting device,
Have multiple lighting devices described in claim 1；
In plane regards, above-mentioned multiple lighting devices are mutually adjacent to configuration and are constituted.
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| JP2017-082901 | 2017-04-19 | ||
| JP2017082901A JP2018181729A (en) | 2017-04-19 | 2017-04-19 | Luminaire |
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| CN108732675B CN108732675B (en) | 2021-08-10 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108732675B (en) | 2021-08-10 |
| JP2018181729A (en) | 2018-11-15 |
| JP2022028799A (en) | 2022-02-16 |
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