CN105527670B - Planar light source device, liquid crystal display device and electronic equipment - Google Patents
Planar light source device, liquid crystal display device and electronic equipment Download PDFInfo
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- CN105527670B CN105527670B CN201510660795.3A CN201510660795A CN105527670B CN 105527670 B CN105527670 B CN 105527670B CN 201510660795 A CN201510660795 A CN 201510660795A CN 105527670 B CN105527670 B CN 105527670B
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- Prior art keywords
- guide plate
- light
- light guide
- light source
- incidence surface
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Classifications
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
Planar light source device, liquid crystal display device and electronic equipment are provided.The gap of distance as defined in being formed between the light out part of light source and the incidence surface of light guide plate.Planar light source device has：Light guide plate has incidence surface in side；Light source, is provided with the light out part of emergent light on the surface of defined outer surface, and the light source be configured as light source light out part it is opposite with the incidence surface of light guide plate；Substrate installs light source on the substrate；And framework, it is surrounded around light guide plate, the planar light source device is characterized in that there is gap to form unit at least one of light guide plate, substrate or framework, which forms unit can form the gap of defined distance between light out part and incidence surface.
Description
Technical field
The present invention relates to planar light source device, liquid crystal display device and electronic equipments.
Background technology
As the display device of electronic equipment, liquid crystal display device is used.In recent years, Light Emitting will be used
Diode (LED) is used as the backlight of liquid crystal display device as the planar light source device of light source.It is used in the LED of planar light source device
Has the light out part through light such as fluorescent material.The light being emitted from LED is emitted to outside via the light out part.It is emitted from LED
Light is incident to light guide plate from the incidence surface of the side of light guide plate, in light guide plate inner total reflection and is directed to the light extraction of light guide plate
Face.Light guide plate is also referred to as light guide.
In the past, in the LED for being used in planar light source device, light out part is housed inside the encapsulation for having opening portion in front surface
In component, light out part is received in a manner of being recessed relative to the opening portion of package parts.Therefore, though LED and light guide plate with
The mode fitted closely mutually configures, and the possibility that the light out part of LED is directly contacted with light guide plate is also smaller.In addition, light out part
Opening portion relative to package parts becomes recess portion, and thereby, it is possible to the sandwicheds between the light out part of LED and the incidence surface of light guide plate
Air layer (referring to patent document 1 and patent document 2) appropriate.
Patent document 1：Japanese Unexamined Patent Publication 2006-278122 bulletins
Patent document 2：Japanese Unexamined Patent Publication 2012-237826 bulletins
Invention content
In the planar light source device for expecting high brightness, it is expected that realizing the installation of LED with narrow spacing.In marginal ray
In the planar light source device of (edge light) mode, the demand of high brightness is coped with, in the past, is allowed in the multiple summits of frame and matches
Set multiple LED.But in recent years, in order to realize small-sized and obtain the display area of bigger, there is keep frame width narrower narrow
The demand of frame.Therefore, it is desirable to intensively configure more LED with narrower spacing in a line of frame.
Therefore, more LED are configured with narrower spacing in order to realize, the miniaturization of LED continues to develop.With small-sized
In turning to purpose and the LED that develops, there are the feelings that the size reduction of package parts, light out part are exposed to the outer surface of package parts
Condition.If so that such LED is configured with the mode that light guide plate fits closely, light out part can be contacted with light guide plate.It is tied
Fruit, light out part may damage.In addition, light out part is contacted with light guide plate, as a result, between light out part and the incidence surface of light guide plate
Not sandwiched air layer.Due to not sandwiched air layer, the light for the high angle ingredient not being totally reflected in light guide plate is incident
To light guide plate.As a result, the brightness of planar light source device may decline.Therefore, it problem of the present invention is that, is exposed in light out part
In the LED of the outer surface of package parts, the gap of predetermined distance is formed between light out part and the incidence surface of light guide plate.
In the present invention, in order to solve the above problems, using means below.That is, the face light that the present invention is discussed further below
Source device.
The planar light source device has：Light guide plate has incidence surface in side；Light source, the table in defined outer surface
Be provided with the light out part of emergent light on face, and the light source be configured as light source light out part it is opposite with the incidence surface of light guide plate；Base
Plate installs light source on the substrate；And framework, it surrounds around light guide plate, which is characterized in that, guide-lighting
There is gap to form unit at least one of plate, substrate or framework, which, which forms unit, light out part and to enter light
The gap of distance as defined in being formed between face.
There is gap to form list for planar light source device according to the present invention, at least one of light guide plate, substrate or framework
Member, which forms unit can form the gap of defined distance between light out part and the incidence surface of light guide plate, as a result, can
Enough gaps that defined distance is formed between light out part and the incidence surface of light guide plate.As a result, the present invention can inhibit to use
The decline of the brightness of the planar light source device of light source on the surface of defined outside is arranged in the light out part of emergent light.
In addition, the planar light source device of the present invention can have next feature.
Gap, which forms unit, has protrusion, which is provided with more at a prescribed interval on the incidence surface of light guide plate
It is a, in the part by making light out part that protrusion abuts to light source, formed between light out part and incidence surface as defined in away from
From gap.
According to such invention, multiple protrusions is provided at a prescribed interval on the incidence surface of light guide plate by making
Abut in a part for the light out part of light source, can be formed between the light out part of light source and the incidence surface of light guide plate as defined in
The gap of distance.
In addition, the planar light source device of the present invention can have next feature.
Gap, which forms unit, has protrusion, which is provided with more at a prescribed interval on the incidence surface of light guide plate
It is a, by making protrusion abut on the position in addition to light out part of light source, regulation is formed between light out part and incidence surface
Distance gap.
According to such invention, multiple protrusions is provided at a prescribed interval on the incidence surface of light guide plate by making
Abut to the position other than the light out part of light source, can be formed between the light out part of light source and the incidence surface of light guide plate as defined in
The gap of distance.
In addition, the planar light source device of the present invention can have next feature.
Light source is fixed on the face different from the face equipped with light out part of light source on substrate parts, and gap forms unit and passes through
So that protrusion is abutted on substrate parts, forms the gap of defined distance between light out part and incidence surface.
According to such invention, multiple protrusions is provided at a prescribed interval on the incidence surface of light guide plate by making
It abuts on substrate parts, the gap of defined distance can be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, the planar light source device of the present invention can have next feature.
Press-in portion is provided on light guide plate, by the way that substrate parts and incidence surface are parallelly pressed into the press-in portion, substrate
Component is extruded relative to protrusion.
According to such invention, substrate parts are squeezed by press-in portion, the position of light source is stablized as a result,.
In addition, the planar light source device of the present invention can have next feature.
For light source with the face be installed on substrate of the face opposite side with light out part with light source, gap forms unit with prominent
Rise portion, the protrusion be provided at a prescribed interval on incidence surface it is multiple, by making protrusion abut on substrate, in light extraction
The gap of distance as defined in being formed between portion and incidence surface.
According to such invention, multiple protrusions is provided at a prescribed interval on the incidence surface of light guide plate by making
It abuts on substrate, the gap of defined distance can be formed between the light out part of light source and the incidence surface of light guide plate.
Gap forms unit has abutting part in the framework, can be abutted with the incidence surface of light guide plate by the abutting part
And realize incidence surface and the relative positioning of framework, light source is managed relative to abutting part, position, is led by making abutting part abut to
On the incidence surface of tabula rasa, the gap of defined distance is formed between light out part and incidence surface.
According to such invention, abutted on the incidence surface of light guide plate by making to be arranged the abutting part in framework, it can
The gap of distance as defined in being formed between the light out part of light source and the incidence surface of light guide plate.
In addition, the planar light source device of the present invention can have next feature.
Framework has limiting unit, and the limiting unit is by directly or indirectly contacting the face with light out part opposite side of light source
Come the position of limiting light source, abutting part has the 2nd limiting unit, the 2nd limiting unit by from the light out part side of light source directly or
Contact light source comes the position of limiting light source indirectly.
According to such invention, by the limiting unit that is arranged in framework and the 2nd limiting unit come the position of limiting light source, by
This, the position of light source is stablized.
In addition, the planar light source device of the present invention can have next feature.
Abutting part has reflecting part, and the light that reflecting part reflection is sent out from the face of the thickness of the formation light out part of light source simultaneously makes
It is incident to incidence surface.
According to such invention, the light sent out from the face of the formation thickness of the light out part of light source is arranged on abutting part
The incidence surface that reflecting part reflects and it is made to be incident to light guide plate, as a result, from the light for being incident to light guide plate in the light that light source is emitted
Ratio improve.
In addition, the planar light source device of the present invention can have next feature.
With the face be installed on substrate different from the face with light out part of light source, gap forms unit to be had multiple light sources
Limiting component, which is fixed on substrate and the position relationship of itself and light source is managed, the limiting component be 1 or
Person is multiple, and gap forms unit by making limiting component abut on the incidence surface of light guide plate, between light out part and incidence surface
The gap of distance as defined in being formed.
It, can be in the light extraction of light source by making limiting component abut on the incidence surface of light guide plate according to such invention
The gap of distance as defined in being formed between portion and the incidence surface of light guide plate.
In addition, the planar light source device of the present invention can have next feature.
Limiting component is the chip component being fixed on by welding on substrate.
According to such invention, the chip component for being employed as general element is used as limiting component, as a result, limiting section
The acquisition of part becomes easy.
In accordance with the invention it is possible between distance as defined in being formed between the light out part of light source and the incidence surface of light guide plate
Gap.As a result, the light source of the invention that the light out part for using emergent light can be inhibited to be arranged on the surface of defined outside
The decline of the brightness of planar light source device.
Description of the drawings
Fig. 1 is the stereogram of an example for the LED for showing the 1st comparative example.
Fig. 2 is shown in the planar light source device of the 1st comparative example, the figure of an example of the peripheral portion of LED and light guide plate.
Fig. 3 is an example for the figure for amplifying the peripheral portion of LED and light guide plate.
Fig. 4 is the figure of an example for the LED for showing the 2nd comparative example.
Fig. 5 is shown in the planar light source device of the 2nd comparative example, the figure of an example of the peripheral portion of LED and light guide plate.
Fig. 6 is an example for the figure for amplifying the contact portion of LED and light guide plate.
Fig. 7 is shown in the planar light source device of embodiment, the figure of an example of the configuration of LED and light guide plate.
Fig. 8 is shown in the planar light source device of embodiment, the figure of an example of LED and the facing part of light guide plate.
Fig. 9 is an example of the figure for the part amplification for facing LED and light guide plate.
Figure 10 is to show the planar light source device of comparative example 2 being compared with the brightness of the planar light source device of embodiment
The figure of an example of chart.
Figure 11 is shown in the planar light source device of embodiment 1, the figure of an example of the configuration of LED and light guide plate.
Figure 12 is the figure of an example for the part for showing that the LED in embodiment 1 is contacted with light guide plate.
Figure 13 is shown in the planar light source device of embodiment 2, the figure of an example of the configuration of LED and light guide plate.
Figure 14 is the figure of an example for the part for showing that the LED in embodiment 2 is contacted with light guide plate.
Figure 15 is shown in the planar light source device of embodiment 3, the figure of an example of the configuration of LED and light guide plate.
Figure 16 is shown in the planar light source device of embodiment 3, the figure of an example for the part that LED and light guide plate face.
Figure 17 is the figure of an example for showing the protruding portion in embodiment 3.
Figure 18 is shown in the planar light source device of embodiment 4, the figure of an example of the configuration of LED and light guide plate.
Figure 19 is the figure of an example for the part for showing that the LED in embodiment 4 is contacted with light guide plate.
Figure 20 is the figure for showing FPC substrates for being equipped with LED in embodiment 4 to an example of the installation direction of light guide plate.
Figure 21 is shown in the planar light source device of embodiment 5, LED, light guide plate and frame configuration an example figure.
Figure 22 is the figure of an example for the part for showing that the frame in embodiment 5 is contacted with light guide plate.
Figure 23 is shown in the planar light source device of embodiment 6, LED, light guide plate and frame configuration an example figure.
Figure 24 is in the planar light source device shown in embodiment 7, and LED, light guide plate, FPC substrates and limiting component are matched
The figure of an example set.
Figure 25 is the figure of an example for showing the FPC substrates equipped with limiting component in embodiment 7.
Figure 26 is an example for showing planar light source device using the present invention as the structure of the liquid crystal display of backlight
Figure.
Figure 27 is the figure of an example for the smart mobile phone for showing to have liquid crystal display.
Label declaration
100、100a：LED；101、101a：Package parts；102：Opening portion；102a：Front surface；103、103a：Phosphor
Material；104、104a：Terminal；105：Air layer；106：Side；150、150a：Frame；151、151a：Cynapse portion；152：Reflection
Portion；153：Maintaining part；154：Maintaining part；110：FPC substrates；111：Substrate；200、200a、200b、200c、200d：Light guide plate；
201、201a、201b、201c：Protruding portion；202：Incidence surface；203：Light-emitting surface；210：Cement；204：The face of opposite side；
300、300a、300b、300c、300d、300e、300f、300g、300h、300i：Planar light source device；4：Backlight；5：Liquid crystal
Show device；6：Smart mobile phone.
Specific implementation mode
In the following, embodiments of the present invention will be described with reference to the accompanying drawings.In addition, embodiments described below is to show
An example for implementing the present invention, not limits the invention to specific structure described below.In carrying out the present invention, preferably suitable
When using the specific structure corresponding to embodiment.
The 1st comparative example ＞ of ＜
The planar light source device of 1st comparative example is made using the LED for accommodating fluorescent material in the opening portion of package parts
For light source.In the following, being illustrated with reference to the 1st comparative example of attached drawing pair.
Fig. 1 is the stereogram of an example for the LED100 for showing the 1st comparative example.LED100 has package parts 101, phosphor
Material 103, terminal 104.The illustration is omitted in Fig. 1, but LED100 has LED element, and the light sent out from LED element is via fluorescence
Material 103 is emitted to outside.In LED described below, if the direction of emergent light is front direction, if its opposite side is rear
To.In addition, in the led, if the long side direction of LED is transverse direction, if thickness direction is upper and lower directions.
Package parts 101 are the exteriors of LED100.Package parts 101 carry out physical protection to LED100.In package parts
101 front surface 102a is equipped with opening portion 102.The light of LED100 is from the opening portion 102 towards external exit.
Terminal 104 is the terminal for being installed to LED100 on substrate.Terminal 104 is arranged at the both ends of LED100.It is right
In LED100, for example, being supplied electric power from terminal 104.
Fluorescent material 103 is the portion for the fluorescence phenomenon that the light sent out based on the LED element having from LED100 is utilized
Part.Fluorescent material 103 in a manner of relative to the front surface 102a for the opening portion 102 for being set to package parts 101 recess (at
For the mode of recess portion) it is contained in opening portion 102.LED100 sends out the light by the fluorescence based on fluorescent material 103 and passes through
The light of the light mixing from LED element of fluorescent material 103.
Fig. 2 is shown in the planar light source device 300 of the 1st comparative example, the one of the peripheral portion of LED100 and light guide plate 200
The figure of example.The fluorescent material 103 of LED100 is configured in a manner of opposite with the incidence surface 202 of light guide plate 200.Go out from LED100
The light penetrated is incident to light guide plate 200 from incidence surface 202.The light incident from incidence surface 202 is guided by light guide plate 200 to light-emitting surface
203.In addition, being equipped with the Brightness of the light optically focused sent out from light-emitting surface 203 on the light-emitting surface 203 of light guide plate 200
Enhancement Film (BEF) piece 301.In the following, in the present specification, if vertical relative to light-emitting surface 203 and towards BEF
The direction of piece 301 is the positive direction of planar light source device 300.
Planar light source device 300 is guided the light from LED100 to light-emitting surface 203 by light guide plate 200, and passes through BEF pieces
301 are directed to the light optically focused of light-emitting surface 203, become the light source to shine with face as a result,.
In light guide plate 200, the light from LED100 incident from incidence surface 202 passes through the total reflection in light guide plate 200
And extend to the entirety of light guide plate 200.In light guide plate 200, locally setting destroys the portion for the condition that light is totally reflected
Point, it is guided as a result, to light-emitting surface 203 in the light of 200 internal reflection of light guide plate.
BEF pieces 301 will be from the light that the light-emitting surface 203 of light guide plate 200 is sent out towards the positive direction of planar light source device 300
Optically focused.By being improved by the brightness of 301 optically focused of BEF pieces, planar light source device 300.
Fig. 3 is by the LED100 and an example of figure for amplifying of the part 90 that is in contact of light guide plate 200 in Fig. 2.LED100 exists
It is contacted with the incidence surface of light guide plate 200 202 in front surface 102a.Fluorescent material 103 relative to front surface 102a to become recess portion
Mode be arranged.Therefore, fluorescent material 103 is not contacted with the incidence surface 202 of light guide plate 200, in fluorescent material 103 and light guide plate
Sandwiched air layer 105 between 200 incidence surface 202.
In the 1st comparative example, the fluorescent material 103 and light guide plate 200 of LED100 are not directly contacted with.Thus, there is no
The possibility that the fluorescent material 103 of LED100 is damaged by light guide plate 200.In addition, the arrow expression described in Fig. 3 is sent out from LED100
Emergent light direction of travel an example.In the 1st comparative example, occur from the light of 100 outgoing of LED encapsulation because of air layer 105
Refraction, and in the incident angles of 200 inner total reflection of light guide plate to incidence surface 202.
The 2nd comparative example ＞ of ＜
The planar light source device 300 of 1st comparative example uses and accommodates fluorescent material in the opening portion of package parts 101 102
103 LED100 is used as light source.In the planar light source device of the 2nd comparative example, it is equipped with using in the front surface of package parts
The LED of fluorescent material is used as light source.The identical label of pair identical with the 1st comparative example inscape imparting, omits repeated explanation.
In the following, being illustrated with reference to the 2nd comparative example of attached drawing pair.
Fig. 4 is the figure shown in an example of LED100a of the front surface equipped with fluorescent material 103a of package parts 101a.
LED100a has package parts 101a, fluorescent material 103a, terminal 104a and substrate 111.For LED100a, compared with the 1st
The LED100 of example compares, and the size of package parts 101a becomes small-sized.For the LED100a of the 2nd comparative example, in package parts
The upper no opening portions 101a, fluorescent material 103a expose in the front surface of package parts.
Terminal 104a is for by the terminal of LED100a be installed on substrate.Terminal 104a is arranged in the cross side of LED100a
To both ends.For LED100a, for example, being supplied electric power from terminal 104a.
The rear surface in LED100a is arranged in substrate 111.The width of substrate 111 is wider than the width of fluorescent material 103a.
It is different from fluorescent material 103 that this point in the front surface of package parts 101a is arranged in fluorescent material 103a.
Fig. 5 is shown in the planar light source device 300a of the 2nd comparative example, the peripheral portion of LED100a and light guide plate 200
The figure of an example.As shown in an example in Fig. 5, in the planar light source device 300a of the 2nd comparative example, the fluorescent material 103a of LED100a
It is in contact with the incidence surface 202 of light guide plate 200.
Fig. 6 is by an example of LED100a and the figure of the contact portion 90a amplifications of light guide plate 200 in Fig. 5.Compare the 2nd
Different from the LED100 of the 1st comparative example in the LED100a of example, front surfaces of the fluorescent material 103a in package parts 101a is exposed.
Therefore, fluorescent material 103a is in contact with the incidence surface 202 of light guide plate 200.As a result, in the 2nd comparative example, it may be glimmering
Damage is generated on luminescent material 103a.
In figure 6, an example of the direction of travel from the LED100a light being emitted is indicated by arrow.In comparative example 2,
The light being emitted from LED100a is directly transmitted to the incidence surface 202 of light guide plate 200 not via air layer.As a result, in light guide plate
In 200, the light that is not totally reflected in the light guide plate 200 is incident to light guide plate 200, the brightness of planar light source device 300a may under
Drop.
《Embodiment》
In the planar light source device of embodiment, as light source, using the LED100a used in the 2nd comparative example.Implementing
In mode, unit is formed by gap, forms the gap of predetermined distance between fluorescent material 103a and the incidence surface of light guide plate.
Pair label identical as the 1st comparative example or the identical inscape imparting of the 2nd comparative example, and omit repeated explanation.In the following, reference
Attached drawing illustrates embodiment.
Fig. 7 is shown in the planar light source device 300b of embodiment, an example of the configuration of LED100a and light guide plate 200
Figure.In the figure 7, it is equipped on flexible printed board (Flexible printed circuits, FPC) 110 multiple
LED100a.LED100a is mounted on its lower surface on FPC substrates 110.The fluorescent material 103a of LED100a with light guide plate
The opposite mode of 200 incidence surface 202 configures.The light being emitted from LED100a is incident to light guide plate 200 through incidence surface 202.
Unit is formed between LED100a and the incidence surface 202 of light guide plate 200 by the gap illustrated by aftermentioned embodiment 1 to 7 to be formed
There is the gap of predetermined distance.LED100a is an example of " light source " of the invention.Fluorescent material 103a is " light out part " of the invention
An example.FPC substrates 110 are an examples of " substrate " of the invention.
Fig. 8 is shown in the planar light source device 300b of embodiment, LED100a and the facing part of light guide plate 200
An example figure.As shown in an example in Fig. 8, in the planar light source device 300b of embodiment, in fluorescent material 103a and leaded light
It is folded with air layer 105 between the incidence surface 202 of plate 200.
Fig. 9 is by an example of the figure of 90b amplifications in part facing with light guide plate 200 LED100a in Fig. 8.LED100a
Fluorescent material 103a do not contacted with the incidence surface 202 of light guide plate 200, but be formed with the gap of predetermined distance.Form rule
The gap of set a distance the result is that being folded with air layer 105 between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
In fig.9, an example of the direction of travel from the LED100a light being emitted is indicated by arrow.From LED100a be emitted light via
Air layer 105 is incident to light guide plate 200 from incidence surface 202.The light being emitted from LED100a is entered by being reflected by air layer 105
It is incident upon the incidence surface 202 of light guide plate 200.
Figure 10 is the brightness for showing the planar light source device 300b by the planar light source device 300a of the 2nd comparative example and embodiment
The figure of an example for the chart being compared.The longitudinal axis of Figure 10 indicates brightness, and the chart of Figure 10 is in the case of setting " having air layer "
Brightness be 100 relative plot.In Fig. 10, the side for being denoted as " air layer " is the planar light source device 300b of embodiment
Measurement result, the side for being denoted as " no air layer " is the measurement result of the planar light source device 300a of the 2nd comparative example.
Referring to Fig.1 known to 0 chart：It is folded with air between fluorescent material 103a and the incidence surface 202 of light guide plate 200
The planar light source device 300b of the embodiment of layer 105 between fluorescent material 103a and the incidence surface 202 of light guide plate 200 than not pressing from both sides
If the planar light source device 300a brightness of the 2nd comparative example of air layer is high.
In embodiments, unit is formed between fluorescent material 103a and the incidence surface 202 of light guide plate 200 by gap
Form the gap of predetermined distance.Thus, there is no fluorescent material 103a cause because being contacted with light guide plate 200 damage can
Energy.
In addition, form the gap of predetermined distance as a result, in the planar light source device 300b of embodiment, in fluorescence
It is folded with air layer 105 between material 103a and the incidence surface 202 of light guide plate 200.Be folded with air layer 105 as a result, root
According to embodiment, even if using LED100a of the front surface in package parts 101a equipped with fluorescent material 103a as light source
In the case of, also it is capable of providing the high planar light source device 300b of brightness.In addition, entering about fluorescent material 103a and light guide plate 200
Defined distance between smooth surface 202, it is the smaller the better other than close contact state.
About it is in embodiments described above, be formed between LED100a and the incidence surface 202 of light guide plate 200
The concrete structure in the gap of defined distance is illustrated as following example 1 to 7.
1 ＞ of ＜ embodiments
In embodiment 1, it is provided with multiple protruding portion at a prescribed interval on the incidence surface of light guide plate.By keeping this prominent
The part for going out portion and the fluorescent material 103a of LED100a abuts, can the incidence surface of fluorescent material 103a and light guide plate it
Between formed as defined in distance gap.In the following, being illustrated to embodiment 1 with reference to attached drawing.
Figure 11 is shown in the planar light source device 300c of embodiment 1, an example of the configuration of LED100a and light guide plate 200a
Figure.Light guide plate 200a and the difference of light guide plate 200 are there is multiple protruding portion at a prescribed interval on incidence surface 202a
201。
Multiple protruding portion 201 is equipped on the incidence surface 202a of light guide plate 200a.The interval ratio of adjacent protruding portion 201
The width of the fluorescent material 103a of LED100a is narrow.Therefore, if matched in a manner of so that LED100a is contacted with light guide plate 200a
LED100a and light guide plate 200a are set, then protruding portion 201 is connected to the both ends of the transverse direction of fluorescent material 103a.Protruding portion 201 is
An example of " protrusion " of the present invention.The both ends of the transverse direction of fluorescent material 103a are " parts for light out part " of the invention
An example.
Figure 12 is the figure for showing LED100a and an example of the parts contacted light guide plate 200a in embodiment 1.In embodiment
In 1, the protruding portion 201 of light guide plate 200a is connected to the end of the fluorescent material 103a of LED100a.In addition, in fluorescent material
The part not contacted with protruding portion 201 in 103a, be formed between the incidence surface 202a of light guide plate 200a as defined in away from
From gap.As a result, being folded with air layer 105 between fluorescent material 103a and the incidence surface 202a of light guide plate 200a.
In embodiment 1, the protruding portion being arranged on light guide plate 200a 201 is made to abut to the fluorescent material of LED100a
The end of 103a.As a result, in embodiment 1, can between fluorescent material 103 and the incidence surface 202a of light guide plate 200a shape
At the gap of defined distance.
2 ＞ of ＜ embodiments
In embodiment 1, by making the protruding portion being arranged on light guide plate 200a 201 be connected to the phosphor of LED100a
The end of material 103, and between distance as defined in being formd between fluorescent material 103a and the incidence surface 202a of light guide plate 200a
Gap.In example 2, by making the protruding portion being arranged on the incidence surface of light guide plate be connected to the substrate 111 of LED100a, and
The gap of distance as defined in being formed between fluorescent material 103a and the incidence surface 202a of light guide plate 200a.
Figure 13 is shown in the planar light source device 300d of embodiment 2, an example of the configuration of LED100a and light guide plate 200b
Figure.Figure 14 is the figure for showing LED100a and an example of the parts contacted light guide plate 200b in embodiment 2.Light guide plate 200b
With being provided with multiple protruding portion 201a at a prescribed interval on incidence surface 202b.
In example 2, LED100a has substrate 111 on surface behind.The width of substrate 111 compares fluorescent material
The width of 103a is wide.
The difference of light guide plate 200b and light guide plate 200a is with protruding portion 201a.Protruding portion 201a is in light guide plate 200b
Incidence surface 202b be equipped with it is multiple.The width of the fluorescent material 103a of the interval ratio LED100a of adjacent protruding portion 201a is wide,
Also, the width than substrate 111 is narrow.The width of protruding portion 201a is narrower than the interval of adjacent LED100a.Protruding portion 201a's is prominent
Output is bigger than from substrate 111 to the height of fluorescent material 103a.Therefore, if so that LED100a was contacted with light guide plate 200b
Mode configures LED100a and light guide plate 200b, then configures LED100a one by one between adjacent protruding portion 201a.In addition,
Protruding portion 201a is connected to the substrate 111 of LED100a.As a result, in the incidence surface of fluorescent material 103a and light guide plate 200b
The gap of distance as defined in being formd between 202b.Protruding portion 201a is an example of " protrusion " of the invention.Substrate 111 is this
An example at " position other than light out part " and " substrate parts " of invention.
In example 2, the substrate of LED100a is connected to by the protruding portion 201a for making to be arranged on light guide plate 200b
111, the gap of defined distance can be formed between fluorescent material 103a and the incidence surface 202b of light guide plate 200b.
3 ＞ of ＜ embodiments
In embodiment 3, LED100a is kept by the protruding portion being arranged on light guide plate, and in fluorescent material
The gap of distance as defined in being formd between 103a and the incidence surface of light guide plate.In the following, being said to embodiment 3 with reference to attached drawing
It is bright.
Figure 15 is shown in the planar light source device 300e of embodiment 3, an example of the configuration of LED100a and light guide plate 200c
Figure.Figure 16 is shown in the planar light source device 300e of embodiment 3, the one of the part that LED100a and light guide plate 200c is faced
The figure of example.The planar light source device 300e of embodiment 3 has light guide plate 200c and LED100a.
The protruding portion 201b positioned to LED100a is equipped on the incidence surface 202c of light guide plate 200c.Protruding portion
201b includes protruding portion 401a and is arranged protrusion 401b in the front end of protruding portion 401a.Tools of the protruding portion 201b from LED100a
There is the side in the face of fluorescent material 103 to be connected to LED100a.The overhang ratio of protruding portion 201b is from substrate 111 to fluorescent material
The height of 103a is big.The interval of adjacent protruding portion 201b is wider than the width of fluorescent material 103a.Protruding portion 201b2 be set as with
Protruding portion 201b is opposed, and the face 204 of the opposite side from the face with fluorescent material 103 of LED100a is connected to
LED100a.LED100a is squeezed by protruding portion 201b and 201b2 in a manner of clamping, its position is determined as a result,.Protruding portion
201b and 201b2 is an example of " press-in portion " of the invention.
Figure 17 is the figure of an example for showing protruding portion 201b, 201b2 in embodiment 3.Between protruding portion 201b and 201b2
It is narrow every the thickness for being formed as the substrate 111 than LED100a.Therefore, the substrate 111 of LED100a presses protruding portion 201b and 201b2
It is flat and be pressed into.Therefore, keep substrate 111, the position of LED100a true by the elastic force of protruding portion 201b and 201b2
It is fixed.
In addition, in fig. 17, protruding portion 201b includes protruding portion 401a and protrusion 401b.But protruding portion 201b is unlimited
In such shape.For example, protruding portion 201b can also omit protrusion 401b.In this case, the protruding portion of protruding portion 201b
401a is connected to LED100a.
In the planar light source device 300e of embodiment 3, protruding portion 201b is abutted with substrate 111, and thus, it is possible in phosphor
The gap of distance as defined in being formed between the incidence surface 202c of material 103a and light guide plate 200c.In addition, substrate 111 is by protruding portion
201b and 201b2 is kept, and the position of LED100a is determined as a result,.
4 ＞ of ＜ embodiments
In example 4, LED100a is to be surface mounted in thereafter on FPC substrates 110.In the following, with reference to attached drawing to embodiment
4 illustrate.
Figure 18 is shown in the planar light source device 300f of embodiment 4, an example of the configuration of LED100a and light guide plate 200d
Figure.Figure 19 is the figure for showing LED100a and an example of the parts contacted light guide plate 200d in embodiment 4.Figure 20 is to show
The figure of FPC substrates 110 for being equipped with LED100a in embodiment 4 relative to an example of the installation direction of light guide plate 200d.It is guide-lighting
Plate 200d has is provided with multiple protruding portion 201c at a prescribed interval on incidence surface 202d.So that LED100a's is glimmering
Mode opposite with the incidence surface 202d of light guide plate 200d luminescent material 103a is equipped with the FPC substrates 110 of LED100a to install.
Protruding portion 201c is connected to FPC substrates 110.FPC substrates 110 are for example engaged by cement 210 with protruding portion 201c.It is prominent
Portion 201c is an example of " protrusion " of the invention.
The difference of light guide plate 200d and light guide plate 200b is to be provided with protruding portion 201c on incidence surface 202d.Protruding portion
201c is provided with multiple on the incidence surface 202d of light guide plate 200d.The interval ratio LED100a's of adjacent protruding portion 201c is glimmering
The width of luminescent material 103a is wide.The width of protruding portion 201c is narrower than the interval of adjacent LED100a.The overhang of protruding portion 201c
It is bigger than from FPC substrates 110 to the height of fluorescent material 103a.Therefore, if so that the side that LED100a is contacted with light guide plate 200d
Formula configures LED100a and light guide plate 200d, then configures LED100a one by one between adjacent protruding portion 201c.In addition, such as
Fruit configures LED100a and light guide plate 200d in a manner of so that LED100a is contacted with light guide plate 200d, then protruding portion 201c is connected to
FPC substrates 110.As a result, foring defined distance between fluorescent material 103a and the incidence surface 202d of light guide plate 200d
Gap.
In example 4, the protruding portion 201c being arranged on light guide plate 200d is made to be connected to the FPC for being equipped with LED100a
Substrate 110.As a result, in example 4, defined distance can be formed between fluorescent material 103a and light guide plate 200d
Gap.
5 ＞ of ＜ embodiments
In embodiment 5, by the way that the abutting part on the frame surrounded around light guide plate 200 is arranged to light guide plate 200
Incidence surface 202 positioned.In the following, being illustrated to embodiment 5 with reference to attached drawing.
Figure 21 is shown in the planar light source device 300g of embodiment 5, and LED100a, light guide plate 200 and frame 150 are matched
The figure of an example set.Figure 22 is the figure of an example for the part for showing that the frame 150 in embodiment 5 is contacted with light guide plate 200.Implement
The planar light source device 300g of example 5 has light guide plate 200, frame 150, LED100a.
Frame 150 is the framework surrounded around light guide plate 200.The medial surface of frame 150 is configured to reflected light.Frame
Frame 150 makes the light reflection leaked out around light guide plate 200 and returns to light guide plate 200.Frame 150 has cynapse portion 151, anti-
Penetrate portion 152, maintaining part 153 and maintaining part 154.Frame 150 is an example of " framework " of the invention.
Cynapse portion 151 is connected to the incidence surface 202 of light guide plate 200, hereby it is achieved that the phase of incidence surface 202 and frame 150
To positioning.Cynapse portion 151 and the position relationship of fluorescent material 103a are managed, fluorescence of the cynapse portion 151 than LED100a is made
Material 103a is prominent to 202 side of incidence surface.Cynapse portion 151 is an example of " abutting part " of the invention.
The side in cynapse portion 151 is arranged in reflecting part 152.Reflecting part 152 is to from as the thickness for forming fluorescent material 103a
The light that the side 106 in the face of degree is sent out is reflected and it is made to be incident to incidence surface 202.In fig. 22, it is indicated by arrow
It is projected from side 106 and by an example of the light of reflecting part reflection.Reflecting part 152 is an example of " reflecting part " of the invention.
Maintaining part 153 is contacted with the rear surface of LED100a, limits the position of LED100a as a result,.Maintaining part 154 from
The sides fluorescent material 103a of LED100a are contacted with LED100a, limit the position of LED100a as a result,.Maintaining part 153 is the present invention
" the 2nd limiting unit " an example.Maintaining part 154 is an example of " limiting unit " of the invention.
In embodiment 5, abutting part 151 is connected to incidence surface 202, and incidence surface 202 is positioned as a result, the position of LED100a
Set the limitation of maintained portion 153 and 154.As a result, being formd between fluorescent material 103a and the incidence surface 202 of light guide plate 200
The gap of defined distance.
6 ＞ of ＜ embodiments
In embodiment 6, by the way that the abutting part on the medial surface for surrounding the frame around light guide plate 200 is arranged to leading
The incidence surface 202 of tabula rasa 200 is positioned.In the following, being illustrated to embodiment 6 with reference to attached drawing.
Figure 23 is shown in the planar light source device 300h of embodiment 6, LED100a, light guide plate 200d and frame 150a's
The figure of an example of configuration.The planar light source device 300h of embodiment 6 has light guide plate 200, frame 150a, LED100a.
Frame 150a and the difference of frame 150 are do not have maintaining part 153,154, substitute abutting part 151 and are arranged prominent
Contact portion 151a.Cynapse portion 151a is arranged on the medial surface of frame 150a.Cynapse portion 151a is connected to incidence surface 202, real as a result,
The relative positioning of incidence surface 202 and frame 150a is showed.Pipe is carried out to the position relationship of cynapse portion 151a and fluorescent material 103a
Reason, cynapse portion 151a is arranged leans on 202 side of incidence surface in the fluorescent material 103a than LED100a.Cynapse portion 151a be connected into
Smooth surface 202, thereby, it is possible to be formed between fluorescent material 103a and the incidence surface 202 of light guide plate 200 between defined distance
Gap.
In embodiment 6, cynapse portion 151a is connected to incidence surface 202, and thereby, it is possible in fluorescent material 103a and light guide plate
The gap of distance as defined in being formed between 200 incidence surface 202.
7 ＞ of ＜ embodiments
In embodiment 7, LED100a is to be surface mounted in thereafter on substrate 110.It is equipped with 1 or more on substrate 110
A limiting component, by making the incidence surface 202 of light guide plate 200 be abutted with limiting component, and in fluorescent material 103a and light guide plate
The gap of distance as defined in being formed between 200 incidence surface 202.In the following, being illustrated to embodiment 7 with reference to attached drawing.
Figure 24 is LED100a, light guide plate 200, FPC substrates 110 in the planar light source device 300i shown in embodiment 7
And the figure of an example of the configuration of limiting component 160.Figure 25 is the FPC substrates equipped with limiting component 160 shown in embodiment 7
The figure of 110 an example.The planar light source device 300i of embodiment 7 has LED100a, light guide plate 200, FPC substrates 110 and limiting section
Part 160.
Limiting component 160 is connected to incidence surface 202, limits the position of incidence surface 202 as a result,.Limiting component 160 is set as
On FPC substrates 110,202 side of incidence surface is leaned on than fluorescent material 103a.Limiting component 160 is, for example, to be fixed on by welding
Chip component on FPC substrates 110.But limiting component 160 is not limited to chip component.Limiting component 160 for example can be for
The component for being exclusively used in limiting component and developing.In addition, in fig. 24, limiting component 160 is arranged between each LED100a.But
It is that the configuration of limiting component 160 is not limited to such form.Limiting component 160, which can be for example arranged, is being arranged as a row
The both ends of LED100a.
In embodiment 7, it is arranged in the limiting component 160 and incidence surface 202 than fluorescent material 103a by 202 side of incidence surface
It abuts, completes the positioning of incidence surface 202 as a result,.As a result, it is possible to the incidence surfaces in fluorescent material 103a and light guide plate 200
The gap of distance as defined in being formed between 202.
Embodiments disclosed above and variation can be respectively combined.For example, also can be by illustrating in embodiment 5
Maintaining part 153,154 limits the position of LED100a, and the limiting component 160 by illustrating in embodiment 7 is carried out into light
The positioning in face 202.
＜ applies ＞ to liquid crystal display
It is capable of providing and has the planar light source device of present invention mentioned above to be used as liquid crystal display of backlight etc. aobvious
Showing device.Figure 26 is to show that planar light source device using the present invention is used as an example of the structure of the liquid crystal display of backlight 4
Figure.The critical piece of liquid crystal display 5 is shown in FIG. 26.Liquid crystal display 5 is configured to：In going out for above-mentioned backlight 4
Smooth surface overlaps with liquid crystal display panel 50.
Liquid crystal display panel 50 is the light by receiving to irradiate from backlight 4 and applies voltage to liquid crystal 51 to make the transmitance of light
It increases or decreases etc. to show the display panel of image.Liquid crystal display panel 50 is configured to：Liquid crystal 51 is clipped in glass plate 52a and 52b
Between and enclose, and then be sandwiched in 1 group of polarizer 53a and 53b.The light sent out from backlight 4 is according to polarizer 53a, glass
Glass plate 52a, liquid crystal 51, glass plate 52b, polarizer 53b sequence pass through each component.
As the liquid crystal display 5 constituted in this way, it can expect small-sized and narrow frame and there is high brightness.
＜ applies ＞ to electronic equipment
In turn, the electronics such as the smart mobile phone, digital camera, tablet terminal for having such liquid crystal display 5 are capable of providing
Equipment.Figure 27 is the figure of an example for the smart mobile phone 6 for showing to have liquid crystal display 5.The electronic equipment as smart mobile phone 6
The display of offer higher-definition can be provided.
Claims (3)
1. a kind of planar light source device, which has：
Light guide plate has incidence surface in side；
Light source is provided with the light out part of emergent light on the surface of defined outer surface, and the light source is configured as the light extraction
Portion is opposite with the incidence surface of the light guide plate；
Substrate installs the light source on the substrate；And
Framework is surrounded around the light guide plate,
The planar light source device is characterized in that,
There is the light guide plate gap to form unit, which forms unit can be between the light out part and the incidence surface
The gap of distance as defined in being formed,
The gap, which forms unit, has a protrusion, the protrusion be provided at a prescribed interval on the incidence surface it is multiple,
The light source is fixed on the face different from the face equipped with the light out part on substrate parts,
The gap forms unit by making the protrusion abut on the substrate parts, the light out part with it is described enter
The gap of distance as defined in being formed between smooth surface,
It is provided with press-in portion on the light guide plate, by the way that the substrate parts and the incidence surface are parallelly pressed into the indentation
Portion, the substrate parts are extruded relative to the protrusion,
The interval being located between the press-in portion and the protrusion of the substrate parts both sides is formed as than the base
The thickness of bottom parts is narrow.
2. a kind of liquid crystal display device, which is characterized in that
The liquid crystal display device has planar light source device described in claim 1 and is used as backlight.
3. a kind of electronic equipment, which is characterized in that
The electronic equipment has the liquid crystal display device described in claim 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-213244 | 2014-10-17 | ||
| JP2014213244A JP6375862B2 (en) | 2014-10-17 | 2014-10-17 | Surface light source device, liquid crystal display device, and electronic apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN105527670A CN105527670A (en) | 2016-04-27 |
| CN105527670B true CN105527670B (en) | 2018-10-12 |
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| CN201510660795.3A Expired - Fee Related CN105527670B (en) | 2014-10-17 | 2015-10-14 | Planar light source device, liquid crystal display device and electronic equipment |
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| JP (1) | JP6375862B2 (en) |
| CN (1) | CN105527670B (en) |
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| CN107332958A (en) * | 2017-06-15 | 2017-11-07 | 捷开通讯(深圳)有限公司 | Mobile terminal and its multi-functional bonnet |
| JP6680311B2 (en) | 2018-06-04 | 2020-04-15 | 日亜化学工業株式会社 | Light emitting device and surface emitting light source |
| JP6801695B2 (en) | 2018-08-03 | 2020-12-16 | 日亜化学工業株式会社 | Light emitting module and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005235560A (en) * | 2004-02-19 | 2005-09-02 | Minebea Co Ltd | Planar lighting device |
| CN101086584A (en) * | 2006-06-09 | 2007-12-12 | 三菱电机株式会社 | Flat light source |
| CN103975192A (en) * | 2011-12-06 | 2014-08-06 | 夏普株式会社 | Backlight unit and liquid-crystal display device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10247412A (en) * | 1997-03-03 | 1998-09-14 | Omron Corp | Surface light source device |
| JP2003090993A (en) * | 2001-09-19 | 2003-03-28 | Kawaguchiko Seimitsu Co Ltd | Backlight structure for liquid crystal display device |
| JP4721160B2 (en) * | 2005-03-29 | 2011-07-13 | ミネベア株式会社 | Surface lighting device |
| JP4915911B2 (en) * | 2006-10-02 | 2012-04-11 | 株式会社 日立ディスプレイズ | Liquid crystal display |
| JP2012216528A (en) * | 2011-03-30 | 2012-11-08 | Sumitomo Chemical Co Ltd | Edge-light type surface light-emitting device |
| JP2012230243A (en) * | 2011-04-26 | 2012-11-22 | Funai Electric Co Ltd | Liquid crystal display module and liquid crystal display apparatus |
| JP2012237826A (en) * | 2011-05-10 | 2012-12-06 | Funai Electric Co Ltd | Liquid crystal module |
| WO2013002171A1 (en) * | 2011-06-28 | 2013-01-03 | シャープ株式会社 | Illuminating device, display device and television receiver |
| JP5556856B2 (en) * | 2012-06-19 | 2014-07-23 | 三菱電機株式会社 | Planar light source device and liquid crystal display device |
-
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- 2014-10-17 JP JP2014213244A patent/JP6375862B2/en not_active Expired - Fee Related
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005235560A (en) * | 2004-02-19 | 2005-09-02 | Minebea Co Ltd | Planar lighting device |
| CN101086584A (en) * | 2006-06-09 | 2007-12-12 | 三菱电机株式会社 | Flat light source |
| CN103975192A (en) * | 2011-12-06 | 2014-08-06 | 夏普株式会社 | Backlight unit and liquid-crystal display device |
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| JP2016081786A (en) | 2016-05-16 |
| CN105527670A (en) | 2016-04-27 |
| JP6375862B2 (en) | 2018-08-22 |
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