CN107193154A - Planar light source device, display device, electronic equipment and light source - Google Patents
Planar light source device, display device, electronic equipment and light source Download PDFInfo
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- CN107193154A CN107193154A CN201710040310.XA CN201710040310A CN107193154A CN 107193154 A CN107193154 A CN 107193154A CN 201710040310 A CN201710040310 A CN 201710040310A CN 107193154 A CN107193154 A CN 107193154A
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- light
- light source
- guide plate
- emitting component
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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
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a kind of planar light source device, display device, electronic equipment and light source, and there is provided a kind of technology of the narrow frame of promotion planar light source device.The planar light source device has：Light guide plate；Reflection part, it is configured in the normal direction of the light entrance face of the light guide plate, with the reflecting surface reflected light；Light-emitting component；Wavelength convert part, it covers at least a portion of the light-emitting component, the wavelength of light is changed, a part of light from light-emitting component injection is by the wavelength convert part and after the reflective surface of the reflection part, incide the light entrance face of the light guide plate, after another part light projected from the light-emitting component is by the wavelength convert part, the light entrance face of the light guide plate is not directly incident on by the reflective surface of the reflection part, at least a portion of the reflecting surface of the reflection part is concave curved surface, the light entrance face of the concave curved surface towards the light guide plate.
Description
Technical field
The present invention relates to planar light source device, display device, electronic equipment and light source.
Background technology
In recent years, for the liquid crystal display device being carried on electronic equipment, in order to be obtained more with identical area
Big viewing area is, it is necessary to carry out narrow frame, slimming.For the backlight of display panel, for example using will project
LED (the Light Emitting Diode of white light：Light emitting diode) encapsulate as light source, and using light guide plate (also referred to as
Fiber waveguide (Light Guide)) side light type (also referred to as marginal ray mode) planar light source device.On above-mentioned technology, it is proposed that
A kind of liquid crystal display that there is liquid crystal panel and possess the panel support body for the light-guiding function to liquid crystal panel irradiation light
Device (with reference to patent document 1).
【Patent document 1】：No. 4045045 publications of Japanese Patent Publication No.
The content of the invention
The demand of the narrow frame of planar light source device gradually increases.In view of such situation, it is an object of the invention to carry
For a kind of technology of the narrow frame of promotion planar light source device.
In order to solve above-mentioned problem, the present invention uses following methods.That is, the present invention is a kind of planar light source device, its feature
It is, the planar light source device has：Light guide plate；Reflection part, it configures the normal direction in the light entrance face of the light guide plate
On, with the reflecting surface reflected light；Light-emitting component；And wavelength convert part, it covers the light-emitting component extremely
A few part, is changed to the wavelength of light, and a part of light projected from the light-emitting component passes through the wavelength convert part
And after the reflective surface of the reflection part, the light entrance face of the light guide plate is incided, lighted from described
After another part light that element is projected is by the wavelength convert part, not by the reflective surface of the reflection part
It is directly incident on the light entrance face of the light guide plate, at least a portion of the reflecting surface of the reflection part is concave curved
Face, the light entrance face of the concave curved surface towards the light guide plate.
According to the planar light source device of the present invention, the reflection part reflected light is configured into the light entrance face in light guide plate
Normal direction on.Projected from light-emitting component and incident by the light after wavelength convert part by the reflective surface of reflection part
To the light entrance face of light guide plate, also, project and be directly incident on by the light of wavelength convert part from light-emitting component and lead
The light entrance face of tabula rasa.Therefore, it is possible to which light guide plate and light-emitting component are configured into L-shaped, thus, it is possible to promote area source
The narrow frame of device.
In addition, the planar light source device of the present invention is characterised by, by the light-emitting component and the wavelength convert part structure
Into light source, the wavelength convert part is separated with the reflecting surface of the reflection part, and there is the light source outgoing to come from institute
The exit facet of the light of light-emitting component is stated, when from the normal direction of the exit facet of the light source, the light guide plate and institute
State light source separation.According to the planar light source device of the present invention, because light guide plate is separated with light source, therefore, even in externally to face
The dislocation of light source occurs when applying load for light supply apparatus, and light guide plate is approached with light source, can also suppressed from the exit facet of light source
The situation that the lower surface of light guide plate is overlapped with the exit facet of light source when being observed in normal direction.
In addition, the planar light source device of the present invention is characterised by that planar light source device possesses the light-emitting component and institute
The light source of wavelength convert part is stated, the wavelength convert part is separated with the reflecting surface of the reflection part, the light source
The exit facet of the light from the light-emitting component with outgoing, when from the normal direction of the light entrance face of the light guide plate,
A part for the light source is overlapped with the light entrance face of the light guide plate.According to the planar light source device of the present invention, due to light
The part in source is overlapped with the light entrance face of light guide plate, therefore, it is possible to suppress when applying load externally to planar light source device
Light source misplaces, and can suppress going out for the lower surface of light guide plate and light source when from the normal direction of the exit facet of light source
Penetrate the situation of face coincidence.
In addition, the planar light source device of the present invention is characterised by that the normal of the reflecting surface of the reflection part passes through
It is in the plane of the exit facet comprising the light source, to the light entrance face than the light guide plate by the light guide plate
The region of side extension.According to the present invention planar light source device, due to reflection part reflecting surface normal by including light source
Exit facet plane in, to than light guide plate light entrance face by light guide plate side extend region, therefore, penetrated from light source
Go out and by reflection part reflective surface light reach light guide plate light entrance face, can be by the utilization of the light projected from light source
Efficiency maintains higher state, the brightness of the light projected from light guide plate can be maintained at into higher state.
In addition, the planar light source device of the present invention is characterised by, it is straight from the light of the exit face of the light source
The ratio that access is mapped to the light of the light entrance face of the light guide plate is less than more than 10% 80%.In addition, the face of the present invention
Light supply apparatus is characterised by that the planar light source device has the framework for the side for surrounding the light guide plate, and the reflection part is set
Put in the framework.According to the planar light source device of the present invention, due to setting reflection in the framework of side for surrounding light guide plate
Part, therefore, it is possible to promote the narrow frame of planar light source device.
In addition, the planar light source device of the present invention is characterised by that the planar light source device possesses the reflection part, institute
State the light source of light-emitting component and the wavelength convert part, the reflection of the wavelength convert part and the reflection part
Face is contacted, and the light source has and outgoing light from the light-emitting component relative with the light entrance face of the light guide plate
Exit facet.According to the planar light source device of the present invention, because wavelength convert part is contacted with the reflecting surface of reflection part, accordingly, it is capable to
Enough suppress the reflecting surface ingress of air of reflection part, the surface oxidation of the reflecting surface thus, it is possible to suppress reflection part.
In addition, the display device of the present invention has：The planar light source device of the present invention；And display panel, it is received from institute
State the light of planar light source device injection.Because such display device has the planar light source device of the light guide plate using the present invention, because
This, using the teaching of the invention it is possible to provide the display device with the planar light source device that can promote narrow frame.In addition, the electronic equipment of the present invention has
The display device of the present invention.Because such electronic equipment possesses the display device of planar light source device, the planar light source device
Use the light guide plate of the present invention, therefore, it is possible to provide the electronic equipment for the display device for possessing planar light source device, the face light
Source device can promote narrow frame.
In addition, the light source of the present invention is characterised by that the light source has：Light-emitting component；Wavelength convert part, it covers institute
At least a portion of light-emitting component is stated, the wavelength of light is changed；Exit facet, light of its outgoing from the light-emitting component；
And reflection part, it has reflecting surface of light of the reflection from the light-emitting component, the wavelength convert part with it is described anti-
The reflecting surface contact of part is penetrated, a part of light from light-emitting component injection is by the wavelength convert part and by institute
After the reflective surface for stating reflection part, from the exit face, another part light projected from the light-emitting component
After the wavelength convert part, do not gone out directly from the exit facet by the reflective surface of the reflection part
Penetrate, at least a portion of the reflecting surface of the reflection part is concave curved surface, the concave curved surface is towards the exit facet.According to
The light source of the present invention, projected from light-emitting component and by after wavelength convert part by reflection part reflective surface light from going out
Penetrate face outgoing, also, project from light-emitting component and by the light of wavelength conversion section from the direct outgoing of exit facet.Therefore, it is possible to incite somebody to action
Light guide plate and light source are configured to L-shaped, the narrow frame thus, it is possible to promote planar light source device.
In accordance with the invention it is possible to promote the narrow frame of planar light source device.
Brief description of the drawings
Fig. 1 is the stereogram of the structure of the liquid crystal display device of exemplified embodiment 1.
Fig. 2 is the stereogram of the structure of the planar light source device of exemplified embodiment 1.
Fig. 3 is the sectional view of the planar light source device of embodiment 1.
Fig. 4 is the sectional view of the planar light source device of embodiment 1.
Fig. 5 is the sectional view of the planar light source device of embodiment 1.
Fig. 6 is the sectional view of the planar light source device of embodiment 1.
Fig. 7 is the sectional view of the planar light source device of embodiment 1.
Fig. 8 is the sectional view of the planar light source device of embodiment 1.
Fig. 9 is the planar light source device of embodiment 1 and the face in the case where light guide plate and light source are configured on straight line
Comparison figure between light supply apparatus.
Figure 10 is the explanation figure of the planar light source device 1 of embodiment 1.
Figure 11 is the explanation figure of the planar light source device 1 of embodiment 1.
Figure 12 is the explanation figure of the planar light source device 1 of embodiment 1.
Figure 13 is the sectional view of the planar light source device of embodiment 2.
Figure 14 is the stereogram of the light source 13 of embodiment 2.
Figure 15 is the curve map for the relative luminance efficiency for representing planar light source device.
Label declaration
1：Planar light source device；2：Display panel；10：Light guide plate；11：Reflector plate；12：Framework；13：Light source；14：Flexibility print
Brush substrate；15：Diffusion sheet；16：Prismatic lens；17：The two-sided band of shading；21：Substrate；22：Light-emitting component；23：Wavelength convert part；
31：Reflection part.
Embodiment
Hereinafter, embodiments of the present invention are illustrated with reference to the accompanying drawings.In addition, embodiments described below is to show
Go out to implement one of the present invention, the invention is not restricted to the concrete structure of following explanation.
In the following embodiments, if " display device " illustrates for liquid crystal display device, if " planar light source device "
Illustrated for the backlight of liquid crystal display device.In addition, " planar light source device " can be used for configuration based on display panel
Or the purposes beyond the backlight such as the front light-source on the preceding surface of the display device of Electronic Paper.
[embodiment 1]
1~Figure 12 of reference picture, is illustrated to the liquid crystal display device of embodiment 1.
(structure of liquid crystal display device)
Fig. 1 is the stereogram of the structure of the liquid crystal display device of exemplified embodiment 1.As shown in figure 1, liquid crystal display
Device has the planar light source device 1 for being configured to backlight and the display panel 2 for receiving the light projected from planar light source device 1.
Display panel 2 passes through to increasing and decreasing the transmissivity of light etc. come display image by glass plate sandwiches sealed liquid crystal applied voltages.With
Under, the side of display panel 2 of planar light source device 1 is set sometimes as upper surface side, if its opposite surface side illustrates for lower face side.
(structure of planar light source device 1)
Fig. 2 is the stereogram of the structure of the planar light source device 1 of exemplified embodiment 1.Planar light source device 1 has leaded light
Plate 10, reflector plate 11, framework 12, light source 13, flexible printed board (also being indicated as below " FPC ") 14, diffusion sheet 15, prismatic lens
16 and the two-sided band 17 of shading.
Light guide plate 10 is substantially planar, former by the translucency such as polycarbonate resin or plexiglass
Material is formed.The upper surface of light guide plate 10 is the light-emitting face of light to escape.The upper surface of light guide plate 10 is relative with liquid crystal panel 2
Face.Light guide plate 10 guides the light incided in light guide plate 10 to light-emitting face, light-emitting face is integrally equably lighted.
Reflector plate 11 is by highly reflecting films or reflectivity with multi-layer film structure higher white resin piece or metal
The smooth sheet of the compositions such as paper tinsel, is reflected light so that the light in light guide plate 10 will not be let out from the lower surface of planar light source device 1
Leakage.Framework 12 is the frame-shaped part (one of " framework ") being made up of 4 sides with opening.Framework 12 is by containing titanium oxide
Polycarbonate resin or the formation such as polycarbonate resin without titanium oxide.Embedded light guide plate 10, frame in framework 12
The inner peripheral surface of frame 12 surrounds the side for the outer peripheral face to form light guide plate 10.Framework 12 has higher reflectivity, reflects from leaded light
The light of the side leakage of plate 10 and recycle.
Light source 13 is from exit face white light.Light source 13 is, for example, LED encapsulation, but it is also possible to beyond LED encapsulation
Light source.Light source 13 is to seal as the LED chip of light-emitting component shape with the translucent resin (resin bed) comprising fluorophor
Into.Light source 13 receives the power supply from FPC 14 and driven.In addition, as light source 13, can also use beyond white
LED/light source.Light source 13 is configured in the lower section of framework 12.FPC 14 is the following circuit board so constituted：With flexibility
Connected up as being set on the base material of insulating film by conductor foil, the covering of the insulating film as protection is bonded on surface
Layer.
Diffusion sheet 15 is translucent resin film, the light that the light-emitting face from light guide plate 10 is sent is spread and is expanded light
Directional property.Prismatic lens 16 is the transparent resin film that upper surface is formed with the specular fine pattern of triangular prism, is assembled by diffusion sheet
Light after 15 diffusions, improves the brightness during planar light source device 1 from upper surface side.Diffusion sheet 15 and 1 or 2 prismatic lenses
16 are arranged on light guide plate 10.
The two-sided band 17 of shading is the splicing tape for the black that upper and lower surface is bonding plane.From upper surface side area source fill
When putting 1, the two-sided band 17 of shading is frame shape.As long as frame shape closed loop shape for example can be rectangular shape, substantially ellipse
Other shapes outside toroidal or above-mentioned shape.Glue upper end of the frame portion of the two-sided band 17 of shading point along framework 12
Connect, suppress light and let out from planar light source device 1.
Fig. 3 is the sectional view of the planar light source device 1 of embodiment 1.Light guide plate 10 is a part for the side of light guide plate 10,
With for the incident light entrance face 10A of light.Light guide plate 10 has light-emitting face 10B of the outgoing from light incident light entrance face 10A,
The light-emitting face 10B of light guide plate 10 is relative with display panel 2.Alternatively, it is also possible to set the light-emitting face 10B of light guide plate 10 as leaded light
The upper surface of plate 10, if the face (opposing face) of the light-emitting face 10B of light guide plate 10 opposite side is the lower surface of light guide plate 10.
Light source 13 has the exit facet 13A of emergent light.The direction of the light entrance face 10A directions of light guide plate 10 and light source 13
The direction of exit facet 13A directions is vertical.Light source 13 has substrate 21, one or more light-emitting components 22 of setting on the base plate (21
And the wavelength convert part 23 of covering luminous element 22.Substrate 21 is, for example, printed base plate.Light-emitting component 22 is, for example, LED core
Piece.Light-emitting component 22 projects the light of specific wavelength.The wavelength for the light that wavelength convert part 23 is projected to light-emitting component 22 is turned
Change.That is, the color of the light that 23 pairs of wavelength convert part is projected from light-emitting component 22 is changed.Wavelength convert part 23 is to include
The translucent resin (resin bed) of fluorophor.For example, projecting blue light in light-emitting component 22, wavelength convert part 23 includes yellow
In the case of fluorophor, a part for blue light is irradiated to fluorophor, thus, and blueness is with yellow mixing from the outgoing of light source 13
Face 13A outgoing white lights.
The reflection part 31 reflected light is provided with framework 12.Reflection part 31 configures the light in light guide plate 10
In plane of incidence 10A normal direction.In addition, reflection part 31 is configured to separate with the wavelength convert part 23 of light source 13.Instead
Penetrate part 31 can future self-emission device 22 light reflex to the light entrance face 10A sides of light guide plate 10 and change the traveling side of light
To.Reflection part 31 has the reflecting surface reflected light, and part or all of the reflecting surface of reflection part 31 is concave curved
Face, light entrance face 10A of the concave curved surface towards light guide plate 10.Reflection part 31 is same shape in the vertical direction of paper.Instead
The section for penetrating part 31 can be circular arc or elliptic arc.Can also be that a part for the reflecting surface of reflection part 31 is curved surface, instead
The another part for penetrating the reflecting surface of part 31 is plane.The reflecting surface of reflection part 31 is processed into be entered to the light from light source 13
Row mirror-reflection., can be by the utilization of the light projected from light source 13 by making the reflecting surface of reflection part 31 carry out mirror-reflection
Efficiency maintains higher state, the brightness of the light projected from light guide plate 10 can be maintained at into higher state.For example, also may be used
To be, by forming the metal film such as Al (aluminium) or Ag (silver) to the evaporation of framework 12, so as to set reflection part 31 on framework 12.
Projected from light source 13 and the light of reflective surface by reflection part 31 incides the light entrance face of light guide plate 10
10A, also, the light projected from light source 13 is directly incident on the light entrance face 10A of light guide plate 10.That is, projected from light-emitting component 22
And by inciding the light entrance face of light guide plate 10 after wavelength convert part 23 by the light of the reflective surface of reflection part 31
10A, also, project from light-emitting component 22 and be directly incident on by the light of wavelength convert part 23 light entrance face of light guide plate 10
10A。
As shown in figure 4, when the section of reflection part 31 is circular arc, by the way that the radius of reflection part 31 is set into light source 13
Thickness (exit facet 13A width) more than, the normal (Fig. 4 dotted line) of the reflecting surface of reflection part 31 and the outgoing of light source 13
Face 13A does not report to the leadship after accomplishing a task, and end by light source 13 or the side that light guide plate 10 is leaned on than the end.In addition, as shown in figure 5, working as
When the section of reflection part 31 is elliptic arc, the normal (Fig. 5 dotted line) and light source of the reflecting surface of reflection part 31 can be set to
13 exit facet 13A does not report to the leadship after accomplishing a task, and by leaning on the side of light guide plate 10 than light source 13.That is, the reflecting surface of reflection part 31
The plane of normal and the exit facet 13A comprising light source 13 of the side of light guide plate 10 is reported to the leadship after accomplishing a task, thus, the reflecting surface of reflection part 31
The exit facet 13A of normal and light source 13 does not report to the leadship after accomplishing a task.So, project from light source 13 and reflective surface by reflection part 31 light
Reach the light entrance face 10A of light guide plate 10.Therefore, it is possible to which the utilization ratio of the light projected from light source 13 to be maintained to higher shape
State, can be maintained at higher state by the brightness of the light projected from light guide plate 10.
When the opposing face of the light-emitting face 10B by light guide plate 10 reflecting surface of the normal relative to reflection part 31 it is complete
When the ratio of portion's normal is 100%, is projected from light source 13 and reach light guide plate in the light of reflective surface by reflection part 31
10 light entrance face 10A light turns into higher proportion.In addition, when the whole normals or most of method of the reflecting surface of reflection part 31
It is in the plane that line passes through the exit facet 13A comprising light source 13, to than light guide plate 10 light entrance face 10A lean on light guide plate 10 one
During the region of side extension, the light for being projected from light source 13 and light guide plate 10 being reached in the light of reflective surface by reflection part 31 enters
Penetrating face 10A light turns into higher proportion.In these cases, by the way that the reflectivity of the reflecting surface of reflection part 31 is set to
100%, project and reached in the light of reflective surface by reflection part 31 the light entrance face 10A's of light guide plate 10 from light source 13
Light turns into substantially 100%.
When applying load externally to planar light source device 1, there is the side skew of the location guide tabula rasa 10 of light source 13,
The exit facet of the lower surface (light-emitting face 10B opposing face) and light source 13 of light guide plate 10 when from the injection direction of light source 13
The situation that 13A is overlapped.After the lower surface (light-emitting face 10B opposing face) of the light of light source 13 from light guide plate 10 is incident, it is possible to
Unevenly bright bright spot (focus) is produced in the picture of display panel 2.In view of the dislocation of light source 13, as shown in fig. 6,
Light source 13 can also be configured into light source 13 to separate from light guide plate 10.In one of the planar light source device 1 shown in Fig. 6, from light
During the exit facet 13A in source 13 normal direction observation, light guide plate 10 is separated with light source 13.By making light guide plate 10 and light source in advance
13 separation, even if occurring the dislocation of light source 13, light guide plate 10 is approached with light source 13, can also suppress the exit facet from light source 13
The exit facet 13A weights of the lower surface (light-emitting face 10B opposing face) of light guide plate 10 and light source 13 during 13A normal direction observation
The situation of conjunction.
In view of the dislocation of light source 13, as shown in fig. 7, light source 13 can also be configured to a part and leaded light for light source 13
The light entrance face 10A of plate 10 is overlapped.In one of the planar light source device 1 shown in Fig. 7, from the light entrance face 10A of light guide plate 10
Normal direction observation when, a part for light source 13 is overlapped with the light entrance face 10A of light guide plate 10.A part for light source 13 is located at
On the light entrance face 10A of light guide plate 10, the dislocation thus, it is possible to suppress light source 13 can suppress the exit facet 13A from light source 13
Normal direction observation when light guide plate 10 lower surface (light-emitting face 10B opposing face) overlapped with the exit facet 13A of light source 13
Situation.
In view of the dislocation of light source 13, as shown in figure 8, light source 13 can also be configured to a part and leaded light for light source 13
The light entrance face 10A of plate 10 is overlapped.In one of the planar light source device 1 shown in Fig. 8, from the light entrance face 10A of light guide plate 10
Normal direction observation when, a part for light source 13 is overlapped with the light entrance face 10A of light guide plate 10.As shown in figure 8, light guide plate 10
Light-emitting face 10B opposing face and light source 13 exit facet 13A it is in the same plane.In addition, the light from light guide plate 10 enters
When penetrating face 10A normal direction observation, the part 10C overlapped in light guide plate 10 with light source 13 is conical by its shape.The one of light source 13
Part is located on the light entrance face 10A of light guide plate 10, and the dislocation thus, it is possible to suppress light source 13 can suppress going out from light source 13
The exit facet of the lower surface (light-emitting face 10B opposing face) and light source 13 of light guide plate 10 when penetrating face 13A normal direction observation
The situation that 13A is overlapped.
According to the planar light source device 1 of embodiment 1, by the way that the reflection part 31 for reflecting the light from light source 13 is configured
In the light entrance face 10A of light guide plate 10 normal direction, light guide plate 10 and light source 13 can be configured to L-shaped.Therefore, with inciting somebody to action
Light guide plate 10 configures the situation on straight line with light source 13 and compared, and can promote the narrow frame of planar light source device 1.
Fig. 9 be the planar light source device 1 of embodiment 1 with the case where light guide plate 10 and light source 13 are configured on straight line
Planar light source device 100 between comparison figure.Fig. 9 (A) is shown from the bright of the light of the injection of planar light source device 1 of embodiment 1
Degree distribution, if the length from the part of brightness uniformity to the profile of planar light source device 1 is L1.Fig. 9 (B) is shown from face light
The Luminance Distribution for the light that source device 100 is projected, if the length from the part of brightness uniformity to the profile of planar light source device 100
For L2.According to the planar light source device 1 of embodiment 1, L1 can be narrowed down to 46% or so of L2.
Figure 10 is the explanation figure of the planar light source device 1 of embodiment 1.Figure 10 (A) represents the section of planar light source device 1,
The chain-dotted line D1 of Figure 10 (A) represents the optical axis of light guide plate 10, and the chain-dotted line D2 of Figure 10 (A) represents the optical axis of light source 13.Figure
The θ of 10 (A) is optical axis angulation of the optical axis with light source 13 of light guide plate 10.The longitudinal axis of Figure 10 (B) represents to incide
The light entrance face 10A of light guide plate 10 light quantity (%), the transverse axis of Figure 10 (B) represents the optical axis of light guide plate 10 and the light of light source 13
Axle angulation (θ).
The solid line S1 of Figure 10 (B) is the entirety in the case where the reflectivity of the reflecting surface of reflection part 31 is 100%
Light quantity (%), the solid line S2 of Figure 10 (B) be the reflecting surface of reflection part 31 reflectivity be 90% in the case of overall light
Measure (%).Overall light quantity (%) is the light quantity for the light entrance face 10A for inciding light guide plate 10 divided by the light quantity projected from light source 13
Obtained from be worth.The solid line S3 of Figure 10 (B) is the light quantity for the light entrance face 10A that light guide plate 10 is directly incident on from light source 13
Value obtained from (also being indicated as below " direct incident light quantity ") divided by the light quantity projected from light source 13.As shown in Figure 10 (B),
As the optical axis of light guide plate 10 increases with the optical axis angulation (θ) of light source 13, light guide plate 10 is directly incident on from light source 13
Light entrance face 10A light quantity reduce.
In the configuration example of the planar light source device 1 shown in Fig. 3~Fig. 8, the optical axis of light guide plate 10 and the optical axis institute of light source 13
Into angle (θ) be 90 degree.The configuration example for the planar light source device 1 being not limited to shown in Fig. 3~Fig. 8, in the area source of embodiment 1
In device 1, the optical axis angulation (θ) of the optical axis of light guide plate 10 and light source 13 can be set as arbitrary angle.To
The optical axis of light guide plate 10 is set as that in the case of 90 degree, direct incident light quantity is relative with the optical axis angulation (θ) of light source 13
Turn into more than 20% in the ratio of the light quantity projected from light source 13.By formed by the optical axis of the optical axis of light guide plate 10 and light source 13
Angle (θ) is set as in the case of 60 degree that direct incident light quantity turns into 40% relative to the ratio of the light quantity projected from light source 13
More than.For example, it is also possible to which the optical axis angulation (θ) of the optical axis of light guide plate 10 and light source 13 is set into direct incident light quantity
Relative to the light quantity projected from light source 13 ratio less than 40% more than 20%.By the optical axis of light guide plate 10 and light source 13
Optical axis angulation (θ) is set as in the case of 120 degree, ratio of the direct incident light quantity relative to the light quantity projected from light source 13
Example turns into more than 10%.The optical axis angulation (θ) of the optical axis of light guide plate 10 and light source 13 is being set as to 20 degree of situation
Under, direct incident light quantity turns into more than 80% relative to the ratio of the light quantity projected from light source 13.For example, it is also possible to by light guide plate
10 optical axis is set to direct incident light quantity relative to the light quantity projected from light source 13 with the optical axis angulation (θ) of light source 13
Ratio less than 80% more than 10%.
Figure 11 is the explanation figure of the planar light source device 1 of embodiment 1.Figure 11 (A) represents the section of planar light source device 1.
The longitudinal axis of Figure 11 (B) represents to incide the propagation efficiency of the light entrance face 10A of light guide plate 10 light.Incide light guide plate 10
The propagation efficiency of light entrance face 10A light refers in the light entrance face 10A for inciding light guide plate 10 light quantity by reflection part 31
Reflective surface and incide light guide plate 10 light entrance face 10A light quantity ratio.The transverse axis of Figure 11 (B) represents reflection
Pass through the ratio of the normal in the region 40 of Figure 11 (A) in whole normals of the reflecting surface of part 31.The region 40 of Figure 11 (A)
It is positioned at regions of the opening 13B than light source 13 by the side of light guide plate 10 on the plane by the exit facet 13A of light source 13.
As shown in Figure 11 (B), pass through the normal in the region 40 of Figure 11 (A) in whole normals of the reflecting surface of reflection part 31
Ratio more than 65%, and the reflecting surface of reflection part 31 reflectivity be 100% in the case of, incide the light of light guide plate 10
The propagation efficiency of plane of incidence 10A light turns into more than 90%.
Figure 12 is the explanation figure of the planar light source device 1 of embodiment 1.Figure 12 (A) represents the section of planar light source device 1.
The longitudinal axis of Figure 12 (B) represents to incide the propagation efficiency of the light entrance face 10A of light guide plate 10 light.The transverse axis of Figure 12 (B)
Represent reflection part 31 reflecting surface whole normals in by the ratio of the normal in the region 50 of Figure 12 (B).Figure 12 (A)
Region 50 be on the plane by the exit facet 13A of light source 10 be located at than light source 13 center line 13C lean on light guide plate 10
The region of side.As shown in Figure 12 (B), pass through the area of Figure 12 (A) in whole normals of the reflecting surface of reflection part 31
The ratio of the normal in domain 50 more than 84%, and the reflecting surface of reflection part 31 reflectivity be 100% in the case of, incide
The propagation efficiency of the light entrance face 10A of light guide plate 10 light turns into more than 90%.
[embodiment 2]
Reference picture 13 and Figure 14, are illustrated to the liquid crystal display device of embodiment 2.Figure 13 is the face of embodiment 2
The sectional view of light supply apparatus 1.In addition, pair with the identical structural element of embodiment 1 mark with the identical label of embodiment 1,
The description thereof will be omitted.As shown in figure 13, light source 13 has substrate 21, sets one or more light-emitting components 22 on the base plate (21, covers
The reflection part 31 of the wavelength convert part 23 of lid light-emitting component 22 and a part for covering wavelength convert part 23.
Reflection part 31 is configured in the light entrance face 10A of light guide plate 10 normal direction.Reflection part 31 can be in the future
The light of self-emission device 22 reflexes to the light entrance face 10A sides of light guide plate 10 and changes the direct of travel of light.Reflection part 31 has
There is the reflecting surface reflected light, part or all of the reflecting surface of reflection part 31 is concave curved surface, and concave curved surface direction is led
The light entrance face 10A of tabula rasa 10.Wavelength convert part 23 is contacted with the reflecting surface of reflection part 31.The section of reflection part 31 can
To be circular arc or elliptic arc.Can also be that a part for the reflecting surface of reflection part 31 is curved surface, the reflecting surface of reflection part 31
Another part be plane.The reflecting surface of reflection part 31 is processed into carries out mirror-reflection to the light for carrying out self-emission device 22.
For example, it is also possible to be, by forming the metal films such as Al or Ag to the evaporation of wavelength convert part 23, to be set on wavelength convert part 23
Put reflection part 31.Alternatively, it is also possible to be covered in reflection part 31 with the discontiguous part of wavelength convert part 23 by resin etc.
Lid.
Light source 13 has the exit facet 13B relative with the light entrance face 10A of light guide plate 10.The quilt of reflection part 31 of light source 13
It is configured to relative with the exit facet 13B of light source 13.Therefore, the reflection part 31 of light source 13 is configured in the exit facet of light source 13
In the opposite direction of 13B normal direction.The light entrance face of light guide plate 10 is incided from the light of the exit facet 13B outgoing of light source 13
10A.Projected from light-emitting component 22 and by after wavelength convert part 23 by reflection part 31 reflective surface light and from hair
Optical element 22 is projected and by the light of wavelength convert part 23 from the exit facet 13B outgoing of light source 13.Therefore, from light-emitting component 22
Injection and the light incidence by inciding light guide plate 10 after wavelength convert part 23 by the light of the reflective surface of reflection part 31
Face 10A, also, the light for projecting from light-emitting component 22 and being directly incident on light guide plate 10 by the light of wavelength convert part 23 is incident
Face 10A.Figure 14 is the stereogram of the light source 13 of embodiment 2.As shown in figure 14, reflection part 31 is dome shape.Therefore,
The middle body of reflection part 31 and the reflecting surface of two end portions are curved surface.
According to the planar light source device 1 of embodiment 2, by the way that reflection is matched somebody with somebody come the reflection part 31 of the light of self-emission device 22
Put in the light entrance face 10A of light guide plate 10 normal direction, light guide plate 10 and light source 13 can be configured to L-shaped.Therefore,
Compared with light guide plate 10 and light source 13 are configured into the situation on straight line, the narrow frame of planar light source device 1 can be promoted.According to
The planar light source device 1 and light source 13 of embodiment 2, from light-emitting component 22 project whole light by after wavelength convert part 23 from
The exit facet 13B outgoing of light source 13.The distribution of color in exit facet 13B therefore, it is possible to suppress light source 13, can cut down leaded light
The irregular colour of light near the light entrance face 10A of plate 10 is even.
According to the planar light source device 1 of embodiment 2, due to framework 12 can be omitted, therefore, it is possible to more promote area source
The narrow frame of device 1.It is anti-due to wavelength convert part 23 and reflection part 31 according to the planar light source device 1 of embodiment 2
Face contact is penetrated, therefore, it is possible to suppress the reflecting surface ingress of air of reflection part 31.Therefore, it is possible to suppress the reflection of reflection part 31
The surface oxidation in face.According to the planar light source device 1 of embodiment 2, because light source 13 and reflection part 31 are integrally formed, therefore face
The number of components of light supply apparatus 1 is reduced.According to the planar light source device 1 of embodiment 2, projected from light-emitting component 22 and by wavelength
Turned back after converting member 23 by the light of the reflective surface of reflection part 31 in the inside of wavelength convert part 23.Therefore, it is used for
The distance that the wavelength (color) of light to being projected from light-emitting component 22 is changed is elongated.Filled according to the area source of embodiment 2
1 is put, light source 13 is integrally formed with reflection part 31, wavelength convert part 23 is contacted with the reflecting surface of reflection part 31.Therefore, light
The overhang that the lower surface from light guide plate 10 in source 13 is protruded reduces, and planar light source device 1 is thinning.
Figure 15 is the relative luminance efficiency for the planar light source device 1 for representing embodiment 1,2 and the reflection by reflection part 31
Face be set to plane in the case of planar light source device relative luminance efficiency curve map.Figure 15 longitudinal axis is represented from embodiment
1st, the relative luminance efficiency for the light that 2 planar light source device 1 is projected and in the case that the reflecting surface of reflection part 31 is set into inclined-plane
From planar light source device project light relative luminance efficiency.Relative luminance efficiency shown in Figure 15 longitudinal axis is with by light guide plate
10 and light source 13 configure on straight line in the case of from planar light source device 100 project light brightness on the basis of.Such as Figure 15
Shown, the relative luminance efficiency of the light projected from the planar light source device 1 of embodiment 1,2 is with the reflecting surface of reflection part 31 is set
The relative luminance efficiency of the light projected from planar light source device in the case of for inclined-plane is compared, and luminance efficiency is greatly improved.
Also, such display device can be equipped on various electronic equipments.As such with display device
Electronic equipment, being capable of exemplified smart mobile phone, digital camera, tablet personal computer terminal, e-book, wearable device, vehicle-mounted
Guider, electronic dictionary, electronic advertisement board etc..Such electronic equipment can realize the basis of miniaturization and slimming
On, additionally it is possible to expect to provide the display of high-quality.
Claims (10)
1. a kind of planar light source device, it is characterised in that the planar light source device has：
Light guide plate；
Reflection part, it is configured in the normal direction of the light entrance face of the light guide plate, with the reflection reflected light
Face；
Light-emitting component；And
Wavelength convert part, it covers at least a portion of the light-emitting component, the wavelength of light is changed,
A part of light from light-emitting component injection is by the wavelength convert part and by the described anti-of the reflection part
Penetrate after the reflection of face, incide the light entrance face of the light guide plate, another part light projected from the light-emitting component passes through
After the wavelength convert part, the institute of the light guide plate is not directly incident on by the reflective surface of the reflection part
State light entrance face,
At least a portion of the reflecting surface of the reflection part is concave curved surface, institute of the concave curved surface towards the light guide plate
State light entrance face.
2. planar light source device according to claim 1, it is characterised in that
Light source is constituted by the light-emitting component and the wavelength convert part,
The wavelength convert part is separated with the reflecting surface of the reflection part,
The light source has the exit facet of light of the outgoing from the light-emitting component,
When from the normal direction of the exit facet of the light source, the light guide plate is separated with the light source.
3. planar light source device according to claim 1, it is characterised in that
The planar light source device possesses the light source of the light-emitting component and the wavelength convert part,
The wavelength convert part is separated with the reflecting surface of the reflection part,
The light source has the exit facet of light of the outgoing from the light-emitting component,
When from the normal direction of the light entrance face of the light guide plate, a part for the light source is described with the light guide plate
Light entrance face is overlapped.
4. the planar light source device according to Claims 2 or 3, it is characterised in that
It is in the plane that the normal of the reflecting surface of the reflection part passes through the exit facet comprising the light source, to than
The region that the light entrance face of the light guide plate extends by the side of the light guide plate.
5. the planar light source device described in any one in Claims 1 to 4, it is characterised in that
The light of the light entrance face of the light guide plate is directly incident on from the light of the exit face of the light source
Ratio is less than more than 10% 80%.
6. the planar light source device described in any one in Claims 1 to 5, it is characterised in that
The planar light source device has the framework for the side for surrounding the light guide plate,
The reflection part is arranged in the framework.
7. planar light source device according to claim 1, it is characterised in that
The planar light source device possesses the light of the reflection part, the light-emitting component and the wavelength convert part
Source,
The wavelength convert part is contacted with the reflecting surface of the reflection part,
The light source has going out for and outgoing light from the light-emitting component relative with the light entrance face of the light guide plate
Penetrate face.
8. a kind of display device, it is characterised in that the display device has：
The planar light source device described in any one in claim 1~7；And
Display panel, it receives the light projected from the planar light source device.
9. a kind of electronic equipment, it is characterised in that the electronic equipment has the display device described in claim 8.
10. a kind of light source, it is characterised in that the light source has：
Light-emitting component；
Wavelength convert part, it covers at least a portion of the light-emitting component, the wavelength of light is changed；
Exit facet, light of its outgoing from the light-emitting component；And
Reflection part, it has the reflecting surface of light of the reflection from the light-emitting component,
The wavelength convert part is contacted with the reflecting surface of the reflection part,
A part of light from light-emitting component injection is by the wavelength convert part and by the described anti-of the reflection part
Penetrate after the reflection of face, from the exit face, another part light projected from the light-emitting component passes through the wavelength conversion section
After part, not by the reflective surface of the reflection part from the direct outgoing of the exit facet,
At least a portion of the reflecting surface of the reflection part is concave curved surface, and the concave curved surface is towards the exit facet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016050248A JP6707921B2 (en) | 2016-03-14 | 2016-03-14 | Surface light source device, display device, electronic device, and light source |
| JP2016-050248 | 2016-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107193154A true CN107193154A (en) | 2017-09-22 |
Family
ID=59871299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710040310.XA Pending CN107193154A (en) | 2016-03-14 | 2017-01-17 | Planar light source device, display device, electronic equipment and light source |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6707921B2 (en) |
| CN (1) | CN107193154A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632698A (en) * | 2018-06-22 | 2019-12-31 | 夏普株式会社 | Illumination device and display device |
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| JPH07253513A (en) * | 1994-03-16 | 1995-10-03 | Hitachi Ltd | Surface light source device |
| JPH1050124A (en) * | 1996-08-06 | 1998-02-20 | Seiko Epson Corp | Lighting system and liquid crystal display |
| CN1503036A (en) * | 2002-11-27 | 2004-06-09 | 鸿富锦精密工业（深圳）有限公司 | LCD device |
| US20070274096A1 (en) * | 2006-05-26 | 2007-11-29 | Tong Fatt Chew | Indirect lighting device for light guide illumination |
| CN101975371A (en) * | 2010-09-09 | 2011-02-16 | 友达光电股份有限公司 | Lower diffusion film, backlight module and display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4498286B2 (en) * | 2006-02-02 | 2010-07-07 | 三菱電機株式会社 | Surface light source device and display device using the surface light source device |
| TWI463708B (en) * | 2009-02-24 | 2014-12-01 | Advanced Optoelectronic Tech | Side-emitting type semiconductor light emitting device package and manufacturing process thereof |
| CN201954400U (en) * | 2011-01-22 | 2011-08-31 | 冠捷显示科技（厦门）有限公司 | LED mixed light backlight source |
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2016
- 2016-03-14 JP JP2016050248A patent/JP6707921B2/en not_active Expired - Fee Related
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- 2017-01-17 CN CN201710040310.XA patent/CN107193154A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07253513A (en) * | 1994-03-16 | 1995-10-03 | Hitachi Ltd | Surface light source device |
| JPH1050124A (en) * | 1996-08-06 | 1998-02-20 | Seiko Epson Corp | Lighting system and liquid crystal display |
| CN1503036A (en) * | 2002-11-27 | 2004-06-09 | 鸿富锦精密工业（深圳）有限公司 | LCD device |
| US20070274096A1 (en) * | 2006-05-26 | 2007-11-29 | Tong Fatt Chew | Indirect lighting device for light guide illumination |
| CN101975371A (en) * | 2010-09-09 | 2011-02-16 | 友达光电股份有限公司 | Lower diffusion film, backlight module and display |
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| CN110632698A (en) * | 2018-06-22 | 2019-12-31 | 夏普株式会社 | Illumination device and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017168228A (en) | 2017-09-21 |
| JP6707921B2 (en) | 2020-06-10 |
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