CN105527670A - Area light source device, display device and electronic device - Google Patents
Area light source device, display device and electronic device Download PDFInfo
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- CN105527670A CN105527670A CN201510660795.3A CN201510660795A CN105527670A CN 105527670 A CN105527670 A CN 105527670A CN 201510660795 A CN201510660795 A CN 201510660795A CN 105527670 A CN105527670 A CN 105527670A
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- light source
- incidence surface
- guide plate
- light guide
- source device
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—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]
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The invention provides an area light source device, a display device and an electronic device. A gap with a regulated distance is formed between a light giving part of a light source and an incident face of a light guiding plate. The area light source device is provided with a light guiding plate, a light source, a substrate and a frame body. An incident face is arranged on the side of the light guiding plate. A light giving part with exit light is arranged on the surface of a regulated outer surface of the light source. The light source is configured in a way that the light giving part of the light source is opposite to the incident plane of the light guiding plate. The light source is installed on the substrate. The frame body surrounds the light guiding plate. The area light source device is characterized in that at least one of the light guiding plate, the substrate and the frame body is provided with a gap forming unit which can form a gap with regulated distance between the light giving part and the light incident plane.
Description
Technical field
The present invention relates to planar light source device, liquid crystal indicator and electronic equipment.
Background technology
As the display device of electronic equipment, use liquid crystal indicator.In recent years, LightEmittingDiode (LED) will be adopted to be used as the backlight of liquid crystal indicator as the planar light source device of light source.The LED being used in planar light source device possesses the light out part through light such as fluorescent material.From the light of LED outgoing via this light out part outgoing to outside.Be incident to light guide plate from the light of LED outgoing from the incidence surface of the side of light guide plate, be directed to the exiting surface of light guide plate in light guide plate inner total reflection.Light guide plate is also referred to as photoconduction.
In the past, in the LED being used in planar light source device, light out part is housed inside to be had in the package parts of peristome at front surface, and light out part is received in the mode caved in relative to the peristome of package parts.Therefore, even if LED and light guide plate configure in the mode fitted tightly mutually, the possibility that the light out part of LED directly contacts with light guide plate is also less.In addition, light out part becomes recess relative to the peristome of package parts, thereby, it is possible to the air layer that sandwiched is suitable between the light out part and the incidence surface of light guide plate of LED (with reference to patent documentation 1 and patent documentation 2).
Patent documentation 1: Japanese Unexamined Patent Publication 2006-278122 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2012-237826 publication
Summary of the invention
In the planar light source device expecting high brightness, expect that the spacing with narrow and small realizes the installation of LED.In the planar light source device of marginal ray (edgelight) mode, the demand of reply high brightness, in the past, allowed and configured multiple LED on many limit of framework.But, in recent years, in order to realize small-sized and obtain larger viewing area, there is the demand of the narrow frame making frame width narrower.Therefore, the limit being desirably in framework intensively configures more LED with narrower and small spacing.
Therefore, in order to realize the miniaturization development configuring more LED, LED with narrower and small spacing.In the LED of exploitation for the purpose of miniaturization, the situation of the outside surface that the size that there are package parts reduces, light out part is exposed to package parts.If configured in the mode making such LED and light guide plate fit tightly, then light out part can contact with light guide plate.Its result, light out part may damage.In addition, light out part contacts with light guide plate, thus, and not sandwiched air layer between light out part and the incidence surface of light guide plate.Due to not sandwiched air layer, therefore, the light of the high angle composition be not totally reflected in light guide plate is incident to light guide plate.Its result, the brightness of planar light source device may decline.Therefore, problem of the present invention is, is exposed in the LED of the outside surface of package parts, forms the gap of predetermined distance between light out part and the incidence surface of light guide plate at light out part.
In the present invention, in order to solve above-mentioned problem, following means are adopted.That is, the present invention is planar light source device as described below.
This planar light source device possesses: light guide plate, and it has incidence surface in side; Light source, it is provided with the light out part of emergent light on the surface of the outside surface of regulation, and the light out part that this light source is configured to light source is relative with the incidence surface of light guide plate; Substrate, installs light source on the substrate; And framework, it surrounds around light guide plate, the feature of this planar light source device is, at least one in light guide plate, substrate or framework has gap forming unit, and this gap forming unit can form the gap of the distance of regulation between light out part and incidence surface.
According to planar light source device of the present invention, at least one in light guide plate, substrate or framework has gap forming unit, this gap forming unit can form the gap of the distance of regulation between light out part and the incidence surface of light guide plate, thereby, it is possible to form the gap of the distance of regulation between light out part and the incidence surface of light guide plate.Its result, the present invention can suppress the light out part that have employed emergent light to be arranged on the decline of the brightness of the planar light source device of the light source on the surface of the outside of regulation.
In addition, planar light source device of the present invention can have ensuing feature.
Gap forming unit has jut, and this jut is multiple with being arranged at intervals with of regulation on the incidence surface of light guide plate, by making jut abut in a part for the light out part of light source, forms the gap of the distance of regulation between light out part and incidence surface.
According to such invention, by making to abut in a part for the light out part of light source with multiple jut that is arranged at intervals with of regulation on the incidence surface of light guide plate, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, planar light source device of the present invention can have ensuing feature.
Gap forming unit has jut, and this jut is multiple with being arranged at intervals with of regulation on the incidence surface of light guide plate, by making jut abut on the position except light out part of light source, forms the gap of the distance of regulation between light out part and incidence surface.
According to such invention, by making on the incidence surface of light guide plate, with the position be arranged at intervals with beyond light out part that multiple juts abuts to light source of regulation, the gap of the distance of regulation to be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, planar light source device of the present invention can have ensuing feature.
Light source is fixed on substrate parts with the face that the face being provided with light out part from light source is different, and gap forming unit abuts on substrate parts by making jut, forms the gap of the distance of regulation between light out part and incidence surface.
According to such invention, by making to abut on substrate parts with multiple jut that is arranged at intervals with of regulation on the incidence surface of light guide plate, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, planar light source device of the present invention can have ensuing feature.
Light guide plate is provided with press-in portion, and by substrate parts and incidence surface are pressed into this press-in portion abreast, substrate parts is extruded relative to jut.
According to such invention, extrude substrate parts by press-in portion, thus, the position stability of light source.
In addition, planar light source device of the present invention can have ensuing feature.
Light source is to be arranged on substrate with the face with the opposition side, face of light out part of light source, gap forming unit has jut, this jut is multiple with being arranged at intervals with of regulation on incidence surface, by making jut abut on substrate, between light out part and incidence surface, form the gap of the distance of regulation.
According to such invention, by making to abut on substrate with multiple jut that is arranged at intervals with of regulation on the incidence surface of light guide plate, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.
Gap forming unit has abutting part in this framework, can be abutted with the incidence surface of light guide plate by this abutting part and realize the relative positioning of incidence surface and framework, light source is relative to abutting part, position is managed, by making abutting part abut on the incidence surface of light guide plate, between light out part and incidence surface, form the gap of the distance of regulation.
According to such invention, by making the abutting part be arranged in framework abut on the incidence surface of light guide plate, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, planar light source device of the present invention can have ensuing feature.
Framework has limiting unit, this limiting unit limits the position of light source by what contact light source directly or indirectly with the face of light out part opposition side, abutting part has the 2nd limiting unit, and the 2nd limiting unit is by contacting from the light out part side of light source the position that light source limits light source directly or indirectly.
According to such invention, limit the position of light source by being arranged on limiting unit in framework and the 2nd limiting unit, thus, the position stability of light source.
In addition, planar light source device of the present invention can have ensuing feature.
Abutting part has reflecting part, and this reflecting part reflects the light that sends from the face of the thickness of the formation light out part of light source and makes it be incident to incidence surface.
According to such invention, the light reflecting part be arranged on abutting part sent from the face of the formation thickness of the light out part of light source reflects and makes it be incident to the incidence surface of light guide plate, thus, improves from the ratio being incident to the light of light guide plate the light of light source outgoing.
In addition, planar light source device of the present invention can have ensuing feature.
Multiple light source is arranged on substrate with the face different from the face with light out part of light source, gap forming unit has limiting component, this limiting component is fixed on substrate and the position relationship of itself and light source is managed, this limiting component is 1 or multiple, gap forming unit abuts on the incidence surface of light guide plate by making limiting component, forms the gap of the distance of regulation between light out part and incidence surface.
According to such invention, by making limiting component abut on the incidence surface of light guide plate, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.
In addition, planar light source device of the present invention can have ensuing feature.
Limiting component is the chip component be fixed on by welding on substrate.
According to such invention, adopt the chip component as general element to be used as limiting component, thus, the acquisition of limiting component becomes easy.
According to the present invention, the gap of the distance of regulation can be formed between the light out part of light source and the incidence surface of light guide plate.Its result, the present invention can suppress the light out part that have employed emergent light to be arranged on the decline of the brightness of the planar light source device of the light source on the surface of the outside of regulation.
Accompanying drawing explanation
Fig. 1 is the stereographic map of an example of the LED that the 1st comparative example is shown.
Fig. 2 illustrates in the planar light source device of the 1st comparative example, the figure of an example of the peripheral part of LED and light guide plate.
Fig. 3 is an example of the figure amplified by the peripheral part of LED and light guide plate.
Fig. 4 is the figure of an example of the LED that the 2nd comparative example is shown.
Fig. 5 illustrates in the planar light source device of the 2nd comparative example, the figure of an example of the peripheral part of LED and light guide plate.
Fig. 6 is an example of the figure contact portion of LED and light guide plate amplified.
Fig. 7 illustrates in the planar light source device of embodiment, the figure of an example of the configuration of LED and light guide plate.
Fig. 8 illustrates 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 part faced by LED and light guide plate amplified.
Figure 10 is the figure of the example that the chart brightness of the planar light source device of comparative example 2 and the planar light source device of embodiment compared is shown.
Figure 11 illustrates 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 of the part that the LED illustrated in embodiment 1 contacts with light guide plate.
Figure 13 illustrates 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 of the part that the LED illustrated in embodiment 2 contacts with light guide plate.
Figure 15 illustrates 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 illustrates in the planar light source device of embodiment 3, the figure of an example of LED and the part faced by light guide plate.
Figure 17 is the figure of an example of the teat illustrated in embodiment 3.
Figure 18 illustrates 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 of the part that the LED illustrated in embodiment 4 contacts with light guide plate.
Figure 20 illustrates the figure of the FPC substrate being provided with LED in embodiment 4 to an example of the installation direction of light guide plate.
Figure 21 illustrates in the planar light source device of embodiment 5, the figure of an example of the configuration of LED, light guide plate and framework.
Figure 22 is the figure of an example of the part that the framework illustrated in embodiment 5 contacts with light guide plate.
Figure 23 illustrates in the planar light source device of embodiment 6, the figure of an example of the configuration of LED, light guide plate and framework.
Figure 24 illustrates in the planar light source device in embodiment 7, the figure of an example of the configuration of LED, light guide plate, FPC substrate and limiting component.
Figure 25 is the figure being provided with an example of the FPC substrate of limiting component illustrated in embodiment 7.
Figure 26 illustrates the figure adopting planar light source device of the present invention as an example of the structure of the liquid crystal display of backlight.
Figure 27 is the figure of the example that the smart mobile phone possessing liquid crystal display is shown.
Label declaration
100,100a:LED; 101,101a: package parts; 102: peristome; 102a: front surface; 103,103a: fluorescent material; 104,104a: terminal; 105: air layer; 106: side; 150,150a: framework; 151,151a: cynapse portion; 152: reflecting part; 153: maintaining part; 154: maintaining part; 110:FPC substrate; 111: substrate; 200,200a, 200b, 200c, 200d: light guide plate; 201,201a, 201b, 201c: teat; 202: incidence surface; 203: exiting surface; 210: cement; 204: the face of opposition side; 300,300a, 300b, 300c, 300d, 300e, 300f, 300g, 300h, 300i: planar light source device; 4: backlight; 5: liquid crystal display; 6: smart mobile phone.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.In addition, the embodiment below illustrated illustrates to implement an example of the present invention, not limits the invention to the concrete structure of following explanation.When implementing of the present invention, preferably suitably adopt the concrete structure corresponding to embodiment.
< the 1st comparative example >
The planar light source device of the 1st comparative example adopts the LED accommodating fluorescent material in the peristome of package parts to be used as light source.Below, with reference to accompanying drawing, the 1st comparative example is described.
Fig. 1 is the stereographic map of an example of the LED100 that the 1st comparative example is shown.LED100 possesses package parts 101, fluorescent material 103, terminal 104.Eliminate diagram in FIG, but LED100 possesses LED element, the light sent from LED element via fluorescent material 103 outgoing to outside.In the LED of following explanation, if the direction of emergent light be front to, if its opposition side be rear to.In addition, in the led, if the long side direction of LED is transverse direction, if thickness direction is above-below direction.
Package parts 101 are the exterior of LED100.Package parts 101 couples of LED100 carry out physical protection.Peristome 102 is provided with at the front surface 102a of package parts 101.The light of LED100 is from this peristome 102 outgoing towards the outside.
Terminal 104 is the terminals for being installed to by LED100 on substrate.Terminal 104 is arranged on the two ends of LED100.For LED100, such as, electric power is supplied from terminal 104.
Fluorescent material 103 is the parts of the fluorescence phenomenon that make use of the light sent based on the LED element possessed from LED100.Fluorescent material 103 is contained in peristome 102 in the mode (to become the mode of recess) caved in relative to the front surface 102a of the peristome 102 being arranged at package parts 101.LED100 sends the light mixed by the light of the fluorescence based on fluorescent material 103 and the light from LED element that have passed fluorescent material 103.
Fig. 2 illustrates in the planar light source device 300 of the 1st comparative example, the figure of an example of the peripheral part of LED100 and light guide plate 200.The fluorescent material 103 of LED100 configures in the relative mode of the incidence surface 202 with light guide plate 200.Light guide plate 200 is incident to from incidence surface 202 from the light of LED100 outgoing.Exiting surface 203 is guided to by light guide plate 200 from the light of incidence surface 202 incidence.In addition, the exiting surface 203 of light guide plate 200 is provided with BrightnessEnhancementFilm (BEF) sheet 301 of the light optically focused sent from exiting surface 203.Below, in this manual, if vertical and be the direction in the front of planar light source device 300 towards the direction of BEF sheet 301 relative to exiting surface 203.
Light from LED100 is guided to exiting surface 203 by light guide plate 200 by planar light source device 300, and will be directed to the light optically focused of exiting surface 203 by BEF sheet 301, thus, becomes with the light source of face luminescence.
In light guide plate 200, extended to the entirety of light guide plate 200 by the total reflection in light guide plate 200 from the light from LED100 of incidence surface 202 incidence.In light guide plate 200, arrange partly and destroy the part that the condition of total reflection occurs light, thus, guided by exiting surface 203 at the light of light guide plate 200 internal reflection.
The light that exiting surface 203 from light guide plate 200 sends by BEF sheet 301 is towards the direction optically focused in the front of planar light source device 300.By by BEF sheet 301 optically focused, the brightness of planar light source device 300 improves.
Fig. 3 is an example of the figure part 90 that the LED100 in Fig. 2 and light guide plate 200 contact amplified.LED100 contacts with the incidence surface 202 of light guide plate 200 in front surface 102a.Fluorescent material 103 is arranged in the mode becoming recess relative to front surface 102a.Therefore, fluorescent material 103 does not contact with the incidence surface 202 of light guide plate 200, sandwiched air layer 105 between fluorescent material 103 and the incidence surface 202 of light guide plate 200.
In the 1st comparative example, fluorescent material 103 and the light guide plate 200 of LED100 directly do not contact.Therefore, what the fluorescent material 103 that there is not LED100 damaged because of light guide plate 200 may.In addition, the arrow described in Fig. 3 represents an example of the direct of travel of the emergent light sent from LED100.In the 1st comparative example, reflect from the light of LED 100 outgoing because of air layer 105, and with the incident angles in light guide plate 200 inner total reflection to incidence surface 202.
< the 2nd comparative example >
The planar light source device 300 of the 1st comparative example adopts the LED100 accommodating fluorescent material 103 in the peristome 102 of package parts 101 to be used as light source.In the planar light source device of the 2nd comparative example, the LED being provided with fluorescent material on the front surface of package parts is adopted to be used as light source.Give identical label to the inscape identical with the 1st comparative example, omit repeat specification.Below, with reference to accompanying drawing, the 2nd comparative example is described.
Fig. 4 illustrates the figure being provided with an example of the LED100a of fluorescent material 103a at the front surface of package parts 101a.LED100a possesses package parts 101a, fluorescent material 103a, terminal 104a and substrate 111.For LED100a, compared with the LED100 of the 1st comparative example, the size of package parts 101a becomes small-sized.For the LED100a of the 2nd comparative example, package parts 101a does not have peristome, fluorescent material 103a exposes at the front surface of package parts.
Terminal 104a is the terminal for being arranged on by LED100a on substrate.Terminal 104a is arranged on the two ends of the transverse direction of LED100a.For LED100a, such as, electric power is supplied from terminal 104a.
Substrate 111 is arranged on the rear surface of LED100a.The width of substrate 111 is wider than the width of fluorescent material 103a.
On the front surface that fluorescent material 103a is arranged on package parts 101a, this point is different from fluorescent material 103.
Fig. 5 illustrates in the planar light source device 300a of the 2nd comparative example, the figure of an example of the peripheral part of LED100a and light guide plate 200.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 contacts with the incidence surface 202 of light guide plate 200.
Fig. 6 is an example of the figure amplified by the contact portion 90a of the LED100a in Fig. 5 and light guide plate 200.In the LED100a of the 2nd comparative example, different from the LED100 of the 1st comparative example, fluorescent material 103a exposes at the front surface of package parts 101a.Therefore, fluorescent material 103a contacts with the incidence surface 202 of light guide plate 200.Its result, in the 2nd comparative example, may produce damage on fluorescent material 103a.
In figure 6, an example of the direct of travel of the light from LED100a outgoing is represented by arrow.In comparative example 2, be not directly transmitted to the incidence surface 202 of light guide plate 200 via air layer from the light of LED100a outgoing.Its result, in light guide plate 200, the light that total reflection does not occur in light guide plate 200 is incident to light guide plate 200, and the brightness of planar light source device 300a may decline.
" embodiment "
In the planar light source device of embodiment, as light source, adopt the LED100a used in the 2nd comparative example.In embodiments, by gap forming unit, between fluorescent material 103a and the incidence surface of light guide plate, form the gap of predetermined distance.Give identical label to the inscape identical with the 1st comparative example or the 2nd comparative example, and omit repeat specification.Below, with reference to accompanying drawing, embodiment is described.
Fig. 7 illustrates in the planar light source device 300b of embodiment, the figure of an example of the configuration of LED100a and light guide plate 200.In the figure 7, flexible printed board (Flexibleprintedcircuits, FPC) 110 is provided with multiple LED100a.LED100a is arranged on FPC substrate 110 with its lower surface.The fluorescent material 103a of LED100a configures in the mode that the incidence surface 202 with light guide plate 200 is relative.Light guide plate 200 is incident to from the light transmission incidence surface 202 of LED100a outgoing.Gap forming unit by being illustrated by embodiment 1 to 7 described later between LED100a and the incidence surface 202 of light guide plate 200 is formed with the gap of predetermined distance.LED100a is an example of " light source " of the present invention.Fluorescent material 103a is an example of " light out part " of the present invention.FPC substrate 110 is examples of " substrate " of the present invention.
Fig. 8 illustrates in the planar light source device 300b of embodiment, the figure of an example of LED100a and the facing part of light guide plate 200.As shown in an example in Fig. 8, in the planar light source device 300b of embodiment, between fluorescent material 103a and the incidence surface 202 of light guide plate 200, be folded with air layer 105.
Fig. 9 is an example of the figure amplified by the LED100a in Fig. 8 and the facing part 90b of light guide plate 200.The fluorescent material 103a of LED100a does not contact with the incidence surface 202 of light guide plate 200, but is formed with the gap of predetermined distance.The result defining the gap of predetermined distance is 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 direct of travel of the light from LED100a outgoing is represented by arrow.Light guide plate 200 is incident to via air layer 105 from incidence surface 202 from the light of LED100a outgoing.The incidence surface 202 of light guide plate 200 is incident to by being reflected by air layer 105 from the light of LED100a outgoing.
Figure 10 is the figure of the example that the chart brightness of the planar light source device 300a of the 2nd comparative example and the planar light source device 300b of embodiment compared is shown.The longitudinal axis of Figure 10 represents brightness, the chart of Figure 10 be brightness when setting " having air layer " as 100 relative plot.In Fig. 10, the side being denoted as " having air layer " is the measurement result of the planar light source device 300b of embodiment, and the side being denoted as " without air layer " is the measurement result of the planar light source device 300a of the 2nd comparative example.
Chart with reference to Figure 10 is known: the planar light source device 300b being folded with the embodiment of air layer 105 between fluorescent material 103a and the incidence surface 202 of light guide plate 200 is higher than the planar light source device 300a brightness of the 2nd comparative example of non-sandwiched air layer between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
In embodiments, between fluorescent material 103a and the incidence surface 202 of light guide plate 200, the gap of predetermined distance is defined by gap forming unit.Therefore, there is not the possibility that fluorescent material 103a causes because contacting with light guide plate 200 damaging.
In addition, define the gap of predetermined distance as a result, in the planar light source device 300b of embodiment, be folded with air layer 105 between fluorescent material 103a and the incidence surface 202 of light guide plate 200.Be folded with air layer 105 as a result, according to embodiment, even if adopt be provided with fluorescent material 103a at the front surface of package parts 101a LED100a as light source, the planar light source device 300b that brightness is high also can be provided.In addition, about the distance of the regulation between fluorescent material 103a and the incidence surface 202 of light guide plate 200, the smaller the better except close contact state.
About in embodiment described above, the concrete structure in the gap of the distance that is formed with regulation between LED100a and the incidence surface 202 of light guide plate 200, be described as following examples 1 to 7.
< embodiment 1 >
In embodiment 1, the incidence surface of light guide plate is arranged at intervals with multiple teat with what specify.By making this teat abut with a part of the fluorescent material 103a of LED100a, the gap of the distance of regulation can be formed between fluorescent material 103a and the incidence surface of light guide plate.Below, with reference to accompanying drawing, embodiment 1 is described.
Figure 11 illustrates in the planar light source device 300c of embodiment 1, the figure of an example of the configuration of LED100a and light guide plate 200a.Light guide plate 200a is from the different of light guide plate 200, and incidence surface 202a has multiple teat 201 with the interval of regulation.
The incidence surface 202a of light guide plate 200a is provided with multiple teat 201.The interval of adjacent teat 201 is narrower than the width of the fluorescent material 103a of LED100a.Therefore, if in the mode making LED100a contact with light guide plate 200a to configure LED100a and light guide plate 200a, then teat 201 is connected to the two ends of the transverse direction of fluorescent material 103a.Teat 201 is examples of " jut " of the present invention.The two ends of the transverse direction of fluorescent material 103a are examples of " part for light out part " of the present invention.
Figure 12 is the figure of an example of the part that the LED100a illustrated in embodiment 1 contacts with light guide plate 200a.In embodiment 1, the teat 201 of light guide plate 200a is connected to the end of the fluorescent material 103a of LED100a.In addition, the part do not contacted with teat 201 in fluorescent material 103a, is formed with the gap of the distance of regulation between the incidence surface 202a of light guide plate 200a.Its result, is folded with air layer 105 between the incidence surface 202a of fluorescent material 103a and light guide plate 200a.
In embodiment 1, the teat 201 be arranged on light guide plate 200a is made to abut to the end of the fluorescent material 103a of LED100a.Its result, in embodiment 1, can form the gap of the distance of regulation between fluorescent material 103 and the incidence surface 202a of light guide plate 200a.
< embodiment 2 >
In embodiment 1, by the end making the teat 201 be arranged on light guide plate 200a be connected to the fluorescent material 103 of LED100a, and between the incidence surface 202a of fluorescent material 103a and light guide plate 200a, the gap of the distance of regulation is defined.In example 2, by the substrate 111 making the teat be arranged on the incidence surface of light guide plate be connected to LED100a, and between the incidence surface 202a of fluorescent material 103a and light guide plate 200a, the gap of the distance of regulation is formed.
Figure 13 illustrates in the planar light source device 300d of embodiment 2, the figure of an example of the configuration of LED100a and light guide plate 200b.Figure 14 is the figure of an example of the part that the LED100a illustrated in embodiment 2 contacts with light guide plate 200b.Light guide plate 200b have on incidence surface 202b with regulation be arranged at intervals with multiple teat 201a.
In example 2, LED100a has substrate 111 thereafter on the surface.The width of substrate 111 is wider than the width of fluorescent material 103a.
Light guide plate 200b has teat 201a from different being of light guide plate 200a.Teat 201a is provided with multiple on the incidence surface 202b of light guide plate 200b.The interval of adjacent teat 201a is wider than the width of the fluorescent material 103a of LED100a, and, narrower than the width of substrate 111.The width of teat 201a is narrower than the interval of adjacent LED100a.The overhang of teat 201a is than large from the height of substrate 111 to fluorescent material 103a.Therefore, if configure LED100a and light guide plate 200b in the mode making LED100a contact with light guide plate 200b, then between adjacent teat 201a, configure LED100a one by one.In addition, teat 201a is connected to the substrate 111 of LED100a.Its result, defines the gap of the distance of regulation between the incidence surface 202b of fluorescent material 103a and light guide plate 200b.Teat 201a is an example of " jut " of the present invention.Substrate 111 is examples at " position beyond light out part " of the present invention and " substrate parts ".
In example 2, by the substrate 111 making the teat 201a be arranged on light guide plate 200b be connected to LED100a, the gap of the distance of regulation can be formed between the incidence surface 202b of fluorescent material 103a and light guide plate 200b.
< embodiment 3 >
In embodiment 3, keep LED100a by the teat be arranged in light guide plate, and between fluorescent material 103a and the incidence surface of light guide plate, define the gap of the distance of regulation.Below, with reference to accompanying drawing, embodiment 3 is described.
Figure 15 illustrates in the planar light source device 300e of embodiment 3, the figure of an example of the configuration of LED100a and light guide plate 200c.Figure 16 illustrates in the planar light source device 300e of embodiment 3, the figure of an example of the part faced by LED100a and light guide plate 200c.The planar light source device 300e of embodiment 3 has light guide plate 200c and LED100a.
The incidence surface 202c of light guide plate 200c is provided with the teat 201b positioned LED100a.Teat 201b comprises teat 401a and is arranged on the protuberance 401b of front end of teat 401a.Teat 201b is connected to LED100a from the side with the face of fluorescent material 103 of LED100a.The overhang of teat 201b is than large from the height of substrate 111 to fluorescent material 103a.The interval of adjacent teat 201b is wider than the width of fluorescent material 103a.Teat 201b2 is set to opposed with teat 201b, and is connected to LED100a from the face 204 with the opposition side in the face of fluorescent material 103 of LED100a.LED100a is extruded in the mode of clamping by teat 201b and 201b2, and thus, its position is determined.Teat 201b and 201b2 is an example of " press-in portion " of the present invention.
Figure 17 is the figure of an example of teat 201b, the 201b2 illustrated in embodiment 3.The gap-forming of teat 201b and 201b2 is narrower than the thickness of the substrate 111 of LED100a.Therefore, teat 201b and 201b2 flattens and is pressed into by the substrate 111 of LED100a.Therefore, the position of substrate 111, LED100a is kept to be determined by the elastic force of teat 201b and 201b2.
In addition, in fig. 17, teat 201b comprises teat 401a and protuberance 401b.But teat 201b is not limited to such shape.Such as, teat 201b also can omit protuberance 401b.In this case, the teat 401a of teat 201b is connected to LED100a.
In the planar light source device 300e of embodiment 3, teat 201b abuts with substrate 111, can form the gap of the distance of regulation thus between the incidence surface 202c of fluorescent material 103a and light guide plate 200c.In addition, substrate 111 is kept by teat 201b and 201b2, and thus, the position of LED100a is determined.
< embodiment 4 >
In example 4, LED100a is to be surface mounted in thereafter on FPC substrate 110.Below, with reference to accompanying drawing, embodiment 4 is described.
Figure 18 illustrates in the planar light source device 300f of embodiment 4, the figure of an example of the configuration of LED100a and light guide plate 200d.Figure 19 is the figure of an example of the part that the LED100a illustrated in embodiment 4 contacts with light guide plate 200d.Figure 20 illustrates the figure of the FPC substrate 110 being provided with LED100a in embodiment 4 relative to an example of the installation direction of light guide plate 200d.Light guide plate 200d have on incidence surface 202d with regulation be arranged at intervals with multiple teat 201c.To make the fluorescent material 103a of the LED100a mode relative with the incidence surface 202d of light guide plate 200d, the FPC substrate 110 being provided with LED100a is installed.Teat 201c is connected to FPC substrate 110.FPC substrate 110 is such as engaged by cement 210 with teat 201c.Teat 201c is an example of " jut " of the present invention.
Light guide plate 200d is provided with teat 201c from different being of light guide plate 200b on incidence surface 202d.Teat 201c is provided with multiple on the incidence surface 202d of light guide plate 200d.The interval of adjacent teat 201c is wider than the width of the fluorescent material 103a of LED100a.The width of teat 201c is narrower than the interval of adjacent LED100a.The overhang of teat 201c is than large from the height of FPC substrate 110 to fluorescent material 103a.Therefore, if configure LED100a and light guide plate 200d in the mode making LED100a contact with light guide plate 200d, then between adjacent teat 201c, configure LED100a one by one.In addition, if configure LED100a and light guide plate 200d in the mode making LED100a contact with light guide plate 200d, then teat 201c is connected to FPC substrate 110.Its result, defines the gap of the distance of regulation between the incidence surface 202d of fluorescent material 103a and light guide plate 200d.
In example 4, the teat 201c be arranged on light guide plate 200d is made to be connected to the FPC substrate 110 being provided with LED100a.Its result, in example 4, can form the gap of the distance of regulation between fluorescent material 103a and light guide plate 200d.
< embodiment 5 >
In embodiment 5, positioned by the incidence surface 202 of abutting part to light guide plate 200 be arranged on the framework of the surrounding surrounding light guide plate 200.Below, with reference to accompanying drawing, embodiment 5 is described.
Figure 21 illustrates in the planar light source device 300g of embodiment 5, the figure of an example of the configuration of LED100a, light guide plate 200 and framework 150.Figure 22 is the figure of an example of the part that the framework 150 illustrated in embodiment 5 contacts with light guide plate 200.The planar light source device 300g of embodiment 5 has light guide plate 200, framework 150, LED100a.
Framework 150 is the frameworks of the surrounding surrounding light guide plate 200.The medial surface of framework 150 is configured to be capable of reflecting light.Framework 150 makes the light spilt from the surrounding of light guide plate 200 reflect and turns back to light guide plate 200.Framework 150 has cynapse portion 151, reflecting part 152, maintaining part 153 and maintaining part 154.Framework 150 is examples of " framework " of the present invention.
Cynapse portion 151 is connected to the incidence surface 202 of light guide plate 200, thus, achieves the relative positioning of incidence surface 202 and framework 150.The position relationship of cynapse portion 151 and fluorescent material 103a is managed, makes cynapse portion 151 more outstanding to incidence surface 202 side than the fluorescent material 103a of LED100a.Cynapse portion 151 is examples of " abutting part " of the present invention.
Reflecting part 152 is arranged on the side in cynapse portion 151.The light that the side 106 of reflecting part 152 to the face from the thickness as formation fluorescent material 103a sends reflects and makes it be incident to incidence surface 202.In fig. 22, an example of 106 injections from the side the light reflected by reflecting part is represented by arrow.Reflecting part 152 is examples of " reflecting part " of the present invention.
Maintaining part 153 contacts with the rear surface of LED100a, thus, and the position of restriction LED100a.Maintaining part 154 contacts from the fluorescent material 103a side of LED100a with LED100a, thus, and the position of restriction LED100a.Maintaining part 153 is examples of " the 2nd limiting unit " of the present invention.Maintaining part 154 is examples of " limiting unit " of the present invention.
In embodiment 5, abutting part 151 is connected to incidence surface 202, and thus, incidence surface 202 is located, and the position maintained portion 153 and 154 of LED100a limits.Its result, defines the gap of the distance of regulation between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
< embodiment 6 >
In embodiment 6, positioned by the incidence surface 202 of abutting part to light guide plate 200 be arranged on the medial surface of the framework of the surrounding surrounding light guide plate 200.Below, with reference to accompanying drawing, embodiment 6 is described.
Figure 23 illustrates in the planar light source device 300h of embodiment 6, the figure of an example of the configuration of LED100a, light guide plate 200d and framework 150a.The planar light source device 300h of embodiment 6 has light guide plate 200, framework 150a, LED100a.
Framework 150a is from the different of framework 150, does not have maintaining part 153,154, substitutes abutting part 151 and arranges cynapse portion 151a.Cynapse portion 151a is arranged on the medial surface of framework 150a.Cynapse portion 151a is connected to incidence surface 202, thus, achieves the relative positioning of incidence surface 202 and framework 150a.Manage the position relationship of cynapse portion 151a and fluorescent material 103a, cynapse portion 151a is arranged on and leans on incidence surface 202 side than the fluorescent material 103a of LED100a.This cynapse portion 151a is connected to incidence surface 202, thereby, it is possible to form the gap of the distance of regulation between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
In embodiment 6, cynapse portion 151a is connected to incidence surface 202, thereby, it is possible to form the gap of the distance of regulation between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
< embodiment 7 >
In embodiment 7, LED100a is to be surface mounted in thereafter on substrate 110.Substrate 110 being provided with 1 or multiple limiting component, by making the incidence surface 202 of light guide plate 200 abut with limiting component, and between fluorescent material 103a and the incidence surface 202 of light guide plate 200, forming the gap of the distance of regulation.Below, with reference to accompanying drawing, embodiment 7 is described.
Figure 24 illustrates in the planar light source device 300i in embodiment 7, the figure of an example of the configuration of LED100a, light guide plate 200, FPC substrate 110 and limiting component 160.Figure 25 is the figure being provided with an example of the FPC substrate 110 of limiting component 160 illustrated in embodiment 7.The planar light source device 300i of embodiment 7 has LED100a, light guide plate 200, FPC substrate 110 and limiting component 160.
Limiting component 160 is connected to incidence surface 202, thus, and the position of restriction incidence surface 202.Limiting component 160 is set on FPC substrate 110, than fluorescent material 103a by incidence surface 202 side.Limiting component 160 is such as the chip component be fixed on by welding on FPC substrate 110.But limiting component 160 is not limited to chip component.Limiting component 160 can be such as the parts developed to be exclusively used in limiting component.In addition, in fig. 24, limiting component 160 is arranged between each LED100a.But the configuration of limiting component 160 is not limited to such form.Limiting component 160 such as can be arranged on the two ends of the LED100a being arranged as row.
In embodiment 7, be arranged on and abut with incidence surface 202 by the limiting component 160 of incidence surface 202 side than fluorescent material 103a, thus, complete the location of incidence surface 202.Its result, can form the gap of the distance of regulation between fluorescent material 103a and the incidence surface 202 of light guide plate 200.
Disclosed embodiment and variation can combine respectively above.Such as, also can be limited the position of LED100a by the maintaining part 153,154 illustrated in embodiment 5, and be carried out the location of incidence surface 202 by the limiting component 160 illustrated in embodiment 7.
< is to the application > of liquid crystal display
Can provide and possess planar light source device of the present invention described above and be used as the display device such as the liquid crystal display of backlight.Figure 26 illustrates the figure adopting planar light source device of the present invention to be used as an example of the structure of the liquid crystal display of backlight 4.Figure 26 illustrates the critical piece of liquid crystal display 5.Liquid crystal display 5 is configured to: have liquid crystal panel 50 in the exiting surface overlap of above-mentioned backlight 4.
Liquid crystal panel 50 is by accepting the light that irradiates from backlight 4 and apply voltage to liquid crystal 51 to make the transmitance of light increase or minimizing etc. shows the display panel of image.Liquid crystal panel 50 is configured to: to be clipped in by liquid crystal 51 between glass plate 52a and 52b and to enclose, and then being clipped in 1 group of Polarizer 53a and 53b.The light sent from backlight 4 according to Polarizer 53a, glass plate 52a, liquid crystal 51, glass plate 52b, Polarizer 53b sequentially pass through each parts.
As the liquid crystal display 5 formed like this, small-sized and narrow frame can be expected and there is high brightness.
< is to the application > of electronic equipment
And then, the electronic equipment such as smart mobile phone, digital camera, tablet terminal possessing such liquid crystal display 5 can be provided.Figure 27 is the figure of the example that the smart mobile phone 6 possessing liquid crystal display 5 is shown.Electronic equipment as smart mobile phone 6 can expect the display providing more high image quality.
Claims (13)
1. a planar light source device, this planar light source device possesses:
Light guide plate, it has incidence surface in side;
Light source, it is provided with the light out part of emergent light on the surface of the outside surface of regulation, and this light source to be configured to this light out part relative with the incidence surface of described light guide plate;
Substrate, installs described light source on the substrate; And
Framework, it surrounds around described light guide plate,
The feature of this planar light source device is,
At least one in described light guide plate, described substrate or described framework has gap forming unit, and this gap forming unit can form the gap of the distance of regulation between described light out part and described incidence surface.
2. planar light source device according to claim 1, is characterized in that,
Described gap forming unit has jut, and this jut is multiple with being arranged at intervals with of regulation on described incidence surface,
By making described jut abut in a part for the light out part of described light source, between described light out part and described incidence surface, form the gap of the distance of regulation.
3. planar light source device according to claim 1, is characterized in that,
Described gap forming unit has jut, and this jut is multiple with being arranged at intervals with of regulation on described incidence surface,
By making described jut abut on the position except described light out part of described light source, between described light out part and described incidence surface, form the gap of the distance of regulation.
4. planar light source device according to claim 3, is characterized in that,
Described light source is fixed on substrate parts with the face different from the face being provided with described light out part,
Described gap forming unit abuts on described substrate parts by making described jut, forms the gap of the distance of regulation between described light out part and described incidence surface.
5. planar light source device according to claim 4, is characterized in that,
Described light guide plate is provided with press-in portion, and by described substrate parts and described incidence surface are pressed into this press-in portion abreast, described substrate parts is extruded relative to described jut.
6. planar light source device according to claim 1, is characterized in that,
Described light source to install on the substrate with the face of the opposition side, face with described light out part,
Described gap forming unit has jut, and this jut is multiple with being arranged at intervals with of regulation on described incidence surface,
By making described jut abut on described substrate, between described light out part and described incidence surface, form the gap of the distance of regulation.
7. planar light source device according to claim 1, is characterized in that,
Described gap forming unit has abutting part in described framework, can be abutted with described incidence surface by this abutting part and realize the relative positioning of described incidence surface and described framework,
Described light source is relative to described abutting part, and position is managed,
By making described abutting part abut on described incidence surface, between described light out part and described incidence surface, form the gap of the distance of regulation.
8. planar light source device according to claim 7, is characterized in that,
Described framework has limiting unit, and this limiting unit limits the position of described light source by what contact described light source directly or indirectly with the face of described light out part opposition side,
Described abutting part has the 2nd limiting unit, and the 2nd limiting unit is by contacting from the light out part side of described light source the position that described light source limits described light source directly or indirectly.
9. the planar light source device according to claim 7 or 8, is characterized in that,
Described abutting part has reflecting part, and the light that the reflection of this reflecting part sends from the face of the thickness forming described light out part also makes it be incident to described incidence surface.
10. planar light source device according to claim 1, is characterized in that,
Multiple described light source is installed on the substrate with the face different from the face with described light out part,
Described gap forming unit has limiting component, and this limiting component is fixed on the substrate and the position relationship of itself and described light source is managed, and this limiting component is 1 or multiple,
Described gap forming unit abuts on described incidence surface by making described limiting component, forms the gap of the distance of regulation between described light out part and described incidence surface.
11. planar light source devices according to claim 10, is characterized in that,
Described limiting component is fixing chip component on the substrate by welding.
12. 1 kinds of liquid crystal indicators, is characterized in that,
The planar light source device that this liquid crystal indicator possesses described in any one in claim 1 to 11 is used as backlight.
13. 1 kinds of electronic equipments, is characterized in that,
This electronic equipment possesses liquid crystal indicator according to claim 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014213244A JP6375862B2 (en) | 2014-10-17 | 2014-10-17 | Surface light source device, liquid crystal display device, and electronic apparatus |
| JP2014-213244 | 2014-10-17 |
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| Publication Number | Publication Date |
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| CN105527670A true CN105527670A (en) | 2016-04-27 |
| CN105527670B 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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| 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 |
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| 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 |
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| 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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| JP2003090993A (en) * | 2001-09-19 | 2003-03-28 | Kawaguchiko Seimitsu Co Ltd | Backlight structure for liquid crystal display device |
| 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 |
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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 |
Also Published As
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| JP2016081786A (en) | 2016-05-16 |
| JP6375862B2 (en) | 2018-08-22 |
| CN105527670B (en) | 2018-10-12 |
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