CN208832222U - Planar illuminating device - Google Patents

Abstract

The utility model provides the planar illuminating device that can be realized further narrow frame.The planar illuminating device of embodiment has light guide plate, LED, FPC and wiring.Light guide plate goes out the light emission from incidence surface incidence.Multiple LED are configured at incidence surface side, and issue light from light-emitting surface.FPC has mounting surface, and the mounting surface is opposed with the bottom surface for the LED that same light-emitting surface intersects, and is equipped with LED.Wiring is formed in the opposing face with mounting surface opposite side of FPC, and multiple LED are connected in series.

Description

Planar illuminating device

Technical field

The utility model relates to a kind of planar illuminating devices.

Background technique

In the past, for example, there are multiple LED (Light Emitting Diode), and the mounting surface in substrate is connected in parallel, The planar illuminating device that light goes out light emission from the incidence surface incidence of light guide plate (for example, referring to patent document 1).It is shone in planar In bright device, multiple LED are for example arranged along the longitudinal direction of rectangular FPC (Flexible Printed Circuit).

Patent document 1: Japanese Unexamined Patent Publication 2016-207279 bulletin

However, in existing technology, need in the mounting surface of FPC, to LED short side direction side cloth around wiring, because The length of this short side direction for making FPC of having to is longer.Therefore, further realizing in existing planar illuminating device There are rooms for improvement on this aspect of narrow frameization.

Utility model content

The utility model is completed in view of above content, and it is an object of the present invention to provide can be realized further narrow frame Planar illuminating device.

In order to solve above-mentioned problem, purpose, the tool of planar illuminating device involved in a mode of the utility model are realized Standby light guide plate, multiple light sources, substrate and wiring.Above-mentioned light guide plate goes out the light emission from incidence surface incidence.Above-mentioned multiple light sources It is configured at above-mentioned incidence surface side, and issues above-mentioned light from light-emitting surface.Aforesaid substrate have mounting surface, the mounting surface with above-mentioned hair The bottom surface for the above-mentioned light source that smooth surface is intersected is opposed, and installs for above-mentioned light source.Above-mentioned wiring be formed in aforesaid substrate with it is above-mentioned The opposing face of mounting surface opposite side, and above-mentioned multiple light sources are connected in series.

A mode according to the present utility model is capable of providing the planar light dress that can be realized further narrow frame It sets.

Detailed description of the invention

Fig. 1 is the main view for indicating an example of appearance for planar illuminating device involved in embodiment.

Fig. 2 is the cross-sectional view of the planar illuminating device of embodiment.

Fig. 3 A is the figure for indicating the mounting surface of FPC of embodiment.

Fig. 3 B is the figure for indicating the opposing face of FPC involved in embodiment.

Fig. 4 is the figure for indicating connection pan portion involved in embodiment.

Fig. 5 is the figure for indicating interconnecting piece involved in embodiment.

Fig. 6 is the figure for indicating connection pan portion and the positional relationship of LED involved in embodiment.

Fig. 7 is the cross-sectional view of FPC involved in embodiment.

Fig. 8 is the cross-sectional view of FPC involved in variation.

Fig. 9 is the cross-sectional view of FPC involved in variation.

Description of symbols

1... planar illuminating device；10,100... anti-dazzling screens；11... frame；12...LED；13... light guide plate； 14...FPC；15... prismatic lens；16... diffusion sheet；17... the first connecting member；18... the second connecting member；20... connect Connect pan portion；21... interconnecting piece；22a, 22b... guide portion；23... reinforcement part；30... conducting parts；40... wiring；41... outer Portion's interconnecting piece；60a, 60b... solder；210... forethiga；211... arm after；212... linking part；213... notch section.

Specific embodiment

Hereinafter, being illustrated referring to attached drawing to planar illuminating device involved in embodiment.In addition, respectively being wanted in attached drawing Relationship, the ratio of each element of size of element etc. are sometimes different from reality.Sometimes in attached drawing each other also including mutual ruler The different part of very little relationship, ratio.In the drawings, for easy understanding illustrate, illustrated sometimes with planar illuminating device Light project direction as Z axis positive direction three-dimensional cartesian coordinate system.

Fig. 1 is the main view for indicating an example of appearance for planar illuminating device involved in embodiment.Such as Fig. 1 Shown in example, the substantially rectangular shape in a bird's eye view of the shape of planar illuminating device 1 involved in embodiment.Planar light dress The one end of 1 longitudinal direction (Y direction) is set by the anti-dazzling screen 10 including the first anti-dazzling screen 10a and the second anti-dazzling screen 10b Covering.In addition, the another side of the longitudinal direction of planar illuminating device 1 is covered by anti-dazzling screen 100.

In addition, the light emitting region that planar illuminating device 1 covers light never by anti-dazzling screen 10,100 (also referred to as shines Area) R is projected.That is, by anti-dazzling screen 10,100 come regulation light emitting region R.Planar illuminating device 1 involved in present embodiment Backlight as liquid crystal display device.Such liquid crystal display device for example uses in smart phone.

In addition, as shown in Figure 1, anti-dazzling screen 10 is more wider than 100 width of anti-dazzling screen.This is because: anti-dazzling screen 100 is in conduct Aftermentioned light guide plate existing for the lower part of the Z axis negative direction side of anti-dazzling screen 100, diffusion sheet, prismatic lens are covered, relative to This, anti-dazzling screen 10 also covers other than covering the aftermentioned light guide plate for being present in the lower part of anti-dazzling screen 10, diffusion sheet, prismatic lens Lid further comprises that aftermentioned LED (Light Emitting Diode), FPC (Flexible Printed Circuit) etc. exist The wide region of interior comparison.

Next, being illustrated using Fig. 2 to the section in the case where cutting of the line A-A of Fig. 1.Fig. 2 is embodiment The cross-sectional view of related planar illuminating device 1.As shown in Fig. 2, planar illuminating device 1 has: the first anti-dazzling screen 10a, second Anti-dazzling screen 10b, frame 11, LED12, light guide plate 13, FPC14, prismatic lens 15, diffusion sheet 16, the first connecting member 17 and Two connecting members 18.

Frame 11 has side wall 11a and bottom surface 11b, is receiving LED12, light guide plate 13, FPC14, prismatic lens 15, diffusion Piece 16, the first connecting member 17, the second connecting member 18 shell.

LED12 is, for example, dotted light source.In the present embodiment, multiple LED12 are along the longitudinal direction as FPC14 X-direction be arranged at predetermined intervals.In addition, the approximation that LED12 is e.g. made of blue led and yellow fluorophor is white Color LED.

LED12 is formed as a whole and with substantially rectangular parallelepiped, has bottom surface 12b and side 12a, 12c, 12d, 12e. Side 12a (light-emitting surface 12a1) is the side for intersecting (for example, orthogonal) relative to bottom surface 12b, and is for light from as a part Region light-emitting surface 12a1 towards aftermentioned 13 side of light guide plate that is, face that Y-axis positive direction projects.In addition, the area of side 12a Domain integrally can be light-emitting surface 12a1.Bottom surface 12b be relative to light-emitting surface 12a1 (side 12a) intersect face, and be with it is aftermentioned FPC14 the opposed face mounting surface 14a.Side 12c is the side intersected relative to bottom surface 12b, and is in light-emitting surface The back side (hereinafter, back side 12c) of the opposite side of 12a1 (side 12a).Side 12d and side 12e is to be respectively relative to send out The side that smooth surface 12a1 and bottom surface 12b intersects.That is, LED12 is the light-emitting surface 12a1 side-view type orthogonal with mounting surface 14a.This Outside, LED12 is also possible to the face so-called top view type opposed with FPC14 of the opposite side of light-emitting surface 12a1.Side 12e be with The face that back side 12c is fixed by solder 60 and FPC14 together, but details of this point will be aftermentioned in Fig. 6.In addition, with The side 12d (referring to Fig. 6) of side 12e opposite side is similarly fixed by solder 60.

Light guide plate 13 is using transparent material (for example, polycarbonate resin) and in a bird's eye view with rectangular-shaped formation.It leads There are two interarea 13a, 13b and side 13c for the tool of tabula rasa 13.Side 13c is opposed with the light-emitting surface 12a1 of LED12, and for shining The incidence surface (hereinafter, being recorded as incidence surface 13c) of the light incidence of face 12a1.Interarea 13a is the light emission made from incidence surface 13c incidence Outgoing plane (hereinafter, being recorded as outgoing plane 13a) out.Interarea 13b be in outgoing plane 13a opposite side opposing face (with Under, it is recorded as opposing face 13b).The optical path being for example made of multiple points, which is formed with, in opposing face 13b changes pattern.

The direction of travel for the light advanced in light guide plate 13 is changed as a result, and penetrates more light from outgoing plane 13a Out.That is, planar illuminating device 1 involved in embodiment is that LED12 is configured along the edge (incidence surface 13c) of light guide plate 13 The lighting device of so-called edge light type.

In addition, light guide plate 13 for example can also be provided with wedge portion in the side side 13c.Specifically, light guide plate 13 can also be with The thickness of light guide plate 13 is provided as from the side side 13c towards the side with side 13c opposite side that is, Y-axis positive direction side (not shown) and the wedge portion at position decrescence.

FPC14 is the substrate of the rectangular flexibility of the orientation along multiple LED12 that is, X-direction extension.This Outside, FPC14 is an example of substrate, is also possible to the substrate of hard (rigid).

FPC14 frame 11 the bottom surface side 11b and between the bottom surface 11b of LED12 and light guide plate 13 and frame 11, with The interarea 13b of light guide plate 13 is configured substantially in parallel.There are two interarea 14a, 14b for FPC14 tool.Interarea 14a is to be equipped with LED12 Mounting surface (hereinafter, being recorded as mounting surface 14a).Mounting surface 14a is opposed with the bottom surface 12b of LED12.In addition, interarea 14b be with The opposing face (hereinafter, being recorded as opposing face 14b) of mounting surface 14a opposite side.In addition, FPC14 and driving circuit (not shown) Connection, driving circuit in this way carry out LED12 to light control.In addition, FPC14 is set to the bottom surface 11b of frame 11 Side, but also can be set in the side outgoing plane 13a of light guide plate 13.Specifically, FPC14 can also be configured at LED12 with bottom The top surface side of face 12b opposite side that is, Z axis positive direction side.

Prismatic lens 15 carry out the distribution controls of the light spread by aftermentioned diffusion sheet 16, and the light that will carry out distribution controls It is projected to the injection direction of Z axis positive direction that is, light.

Diffusion sheet 16 is configured at the side outgoing plane 13a of light guide plate 13, makes the light diffusion projected from outgoing plane 13a.It is specific and Speech for example, diffusion sheet 16 configures in a manner of covering outgoing plane 13a, and makes the light diffusion projected from outgoing plane 13a.

First connecting member 17 and the second connecting member 18 are, for example, double faced adhesive tape.First connecting member 17 makes light guide plate 13 optically or structurally link with LED12.Specifically, the first connecting member 17 makes the incidence surface 13c of light guide plate 13 Link with the light-emitting surface 12a1 of LED12.

Second connecting member 18 is arranged between the interarea 13b and FPC14 of light guide plate 13, and light guide plate 13 is fixed on The component of FPC14.For example, the face of a side is pasted on close in the interarea 14a of FPC14 for the second connecting member 18 At least part of light guide plate 13, and at least part for the close LED12 being pasted in the interarea 13b of light guide plate 13.

Next, being further illustrated to FPC14 using Fig. 3 A and Fig. 3 B.Fig. 3 A is the mounting surface for indicating FPC14 The figure of 14a.Fig. 3 B is the figure for indicating the opposing face 14b of FPC14.

Firstly, being illustrated using Fig. 3 A to the mounting surface 14a of FPC14.As shown in Figure 3A, it is provided in mounting surface 14a Multiple connection pan portion 20-1~20 and external connecting 41.It is (aftermentioned with the electrode terminal of LED12 for connecting pan portion 20-1~20 Terminal 24a, 24b) electrical connection position, for example, being the component of the electric conductivity such as metal.

As shown in Figure 3A, one LED12-1~20 of each configuration are distinguished in multiple connection pan portion 20-1~20.In other words, In figure 3 a, 20 LED12 of sum are configured in mounting surface 14a.In addition, the quantity of LED12 shown in Fig. 3 A is an example, It is also possible to more than one any amount.

In addition, being respectively arranged with and the opposing face 14b with mounting surface 14a opposite side in multiple connection pan portion 20-1~20 Two the conducting parts 30-1a~20a, 30-1b~20b of (referring to Fig. 3 B) electrical connection.

Conducting parts 30-1a~20a, 30-1b~20b are, for example, to be not formed at physically to penetrate through mounting surface 14a and opposite The hole of face 14b, so-called blind via hole.In addition, conducting parts 30-1a~20a, 30-1b~20b are also possible to form perforation installation Other through-holes such as the so-called through hole in the hole of face 14a and opposing face 14b.

For example, connection pan portion 20-1 be provided with the conducting parts 30-1a being electrically connected with the anode terminal of LED12-1 and with The conducting parts 30-1b of cathode terminal electrical connection.

In addition, the outer rim in connection pan portion 20-1~20 is not provided with connection LED12-1~20 in mounting surface 14a Wiring, the cover film for covering the wiring.In other words, such wiring is only arranged at opposing face 14b.

Cloth will be used for as in the past by, which not needing as a result, is set to mounting surface 14a around the space of wiring, therefore can make to locate It is relatively narrow in the region of the outer rim of the upper and lower sides (Y direction) of connection pan portion 20-1~20.In other words, for involved by embodiment And planar illuminating device 1 for, the length of the short side direction that is, Y direction that can make FPC14 is shorter, therefore can be realized Further narrow frame.

External connecting 41 is the position for connecting FPC14 with the driving circuit for lighting control for carrying out LED12.Outside connects Socket part 41 by wiring from opposing face 14b via hole portion cloth around to mounting surface 14a, such wiring is coated epiphragma protection, and with Driving circuit connection.

In addition, wiring is from the opposing face 14b cloth of external connecting 41 around to the side mounting surface 14a, but it is not necessarily required to peace The dress face side 14a cloth only can also be provided with wiring in the side opposing face 14b around wiring.

In addition, connection pan portion 20-1~20, conducting parts 30-1a~20a, 30-1b~20b details will Fig. 4~ It is aftermentioned in Fig. 6.In addition, hereinafter, not distinguishing especially connection pan portion 20-1~20, conducting parts 30-1a~20a, 30-1b~20b In the case where, " pan portion 20 will be connected ", " conducting parts 30a " is generally called and is recorded as " conducting parts 30b ".

Next, being illustrated using Fig. 3 B to the opposing face 14b of FPC14.As shown in Figure 3B, it is arranged in opposing face 14b There are wiring 40-1~22 and external connecting 41.Wiring 40-1~22 are, for example, the portion for the electric conductivity being made of metals such as copper foils Part is formed with conducting pattern by etching etc..In addition, wiring 40-1~22 are by for example by the cover film of the formation such as polyimides Protection (not shown).

Wiring 40-1,40-11,40-12,40-22 in wiring 40-1~22 be connected with cloth coiling 40-1a, 40-11a, 40-12a、40-22a。

Cloth coiling 40-1a is by the Y-axis negative direction side that is, downside cloth in wiring 40-2~11 around thus by wiring 40-1 And wiring 40-12 electrical connection.

Cloth coiling 40-11a is by the Y-axis positive direction side that is, upside cloth in wiring 40-12~40-21 around and wiring Cloth with driving circuit around so that wiring 40-11 be connect with external connecting 41, and being electrically connected between 40-21 and wiring 40-22 It connects.

Cloth coiling 40-12a is by the downside cloth in wiring 40-13~40-21 around thus by wiring 40-1 and wiring 40-12 is connect with external connecting 41, and is electrically connected with driving circuit.

Cloth coiling 40-22a is by the downside cloth in wiring 40-21 around so that wiring 40-22 and external connecting 41 be connected It connects, and is electrically connected with driving circuit.In addition, each wiring 40-1~22 is removed except wiring 40-1 and wiring 40-12, respectively It is carried out electrical isolation.

In addition, each wiring 40-1~22 is removed except wiring 40-1,40-11,40-12,40-22, it is all connected to two and leads to Electric portion 30-1a~20a, 30-1b~20b.Moreover, for the LED12 for being configured at mounting surface 14a (Fig. 3 A), in opposing face 14b is in the position of dotted line shown in Fig. 3 B.Specifically, in figure 3b, 20 LED12-1~20 pass through wiring 40-1~22 10 are connected to be connected in series to form LED array and then be connected in parallel the LED array of two column.

More specifically, each LED12-1~20 across the mode between each wiring 40-1~22 to configure.For example, for from For right side (X-axis positive direction side) starts first LED12-1, anode terminal (aftermentioned terminal 24a) is via conducting parts 30-1a It is connected to wiring 40-1, cathode terminal (aftermentioned terminal 24b) is connected to wiring 40-2 via conducting parts 30-1b.In other words, LED12-1 across the mode between wiring 40-1 and wiring 40-2 to configure.

In addition, anode terminal is connected to via conducting parts 30-2a matches for second LED12-2 since right side Line 40-2, cathode terminal are connected to wiring 40-3 via conducting parts 30-2b.In other words, LED12-2 with across wiring 40-2 with And the mode between wiring 40-3 configures.

In addition, anode terminal is connected to wiring via conducting parts 30-10a for from the tenth, right side LED12-10 40-10, cathode terminal are connected to wiring 40-11 via conducting parts 30-10b.In other words, LED12-10 is to cross over wiring 40- Mode between 10 and wiring 40-11 configures.That is, ten LED12-1~10 and ten LED12-11~20 distinguish in Fig. 3 B It is connected in series.

Next, being described in detail using Fig. 4 to connection pan portion 20.Fig. 4 is the figure for indicating connection pan portion 20.Such as figure Shown in 4, connection pan portion 20 includes a pair of connecting portion 21a, 21b, two guide portions 22a, 22b and reinforcement part 23.

It is respectively arranged with conducting parts 30-a, 30-b in a pair of connecting portion 21a, 21b, and is electrically connected with LED12 (referring to Fig. 6) Electrode terminal (aftermentioned terminal 24a, 24b).Specifically, the anode terminal of LED12 is connected in interconnecting piece 21a, even Socket part 21b is connected with the cathode terminal of LED12.In addition, being recorded in the case where not distinguishing especially two interconnecting piece 21a, 21b For " interconnecting piece 21 ".

Guide portion 22a, 22b is configured to be located between two interconnecting pieces 21a, 21b.Guide portion 22a, 22b be for pair The label whether LED12 is checked during installation with position appropriate and posture installation.

Reinforcement part 23 is configured to be located between two guide portions 22a, 22b.Reinforcement part 23 passes through weldering in the installation of LED12 Expect and fixed with LED12, so that the installation strength to LED12 is reinforced.Thereby, it is possible to prevent the positional shift of LED12, pine It is dynamic.

In addition, what guide portion 22a, 22b and reinforcement part 23 were not necessarily required, also it can be omitted.In addition, shown in Fig. 4 Guide portion 22a, 22b and the quantity of reinforcement part 23 be an example, arbitrary quantity can also be set.

Next, being described in detail using Fig. 5 to interconnecting piece 21.Fig. 5 is the figure for indicating interconnecting piece 21.Such as Fig. 5 institute Show, interconnecting piece 21 has U-shaped shape in a bird's eye view.Specifically, interconnecting piece 21 has forethiga 210, rear arm 211 And linking part 212.

Forethiga 210 is set to light-emitting surface 12a1 (referring to Fig. 6) side of LED12, and has the Y-axis for indicating forethiga 210 The forearm length A1 of the length in direction, and it is configured with above-mentioned conducting parts 30.In addition, forethiga 210 is relative to aftermentioned notch Portion 213 and be formed in Y-axis positive direction side that is, light guide plate 13 (referring to Fig. 2) side.Arm 211 is set to the back side 12c of LED12 afterwards Side, and the rear brachium A2 of the length in the Y direction with arm 211 after indicating.In addition, rear arm 211 is relative to notch section 213 and be formed in and 210 opposite side of forethiga.

As shown in figure 5, interconnecting piece 21 is without respect to the symmetrical shape of X-axis.Specifically, the forearm length A1 of interconnecting piece 21 Greater than rear brachium A2.In other words, rear arm 211 is smaller than 210 region area of forethiga.The forming position of conducting parts 30 as a result, Freedom degree increase, and the formation process transfiguration of conducting parts 30 can be made easy.

Linking part 212 links forethiga 210 and rear arm 211.In addition, it is in rectangle that linking part 212, which has part, The notch section 213 of shape excision.In addition, interconnecting piece 21 is not limited to U-shaped shape, it is also possible to U-shaped, V-shape.Change sentence It talks about, notch section 213 can cut off as curve-like, can also cut off as V shape.

Next, using Fig. 6 to connection pan portion 20 and LED12 installation when positional relationship be illustrated.Fig. 6 is to indicate The figure of connection pan portion 20 and the positional relationship of LED12 involved in embodiment.

As shown in fig. 6, a pair of connecting portion 21a, 21b is in side 12d, the 12e connecting with the both ends of the X-direction of LED12 Side setting.In addition, notch section 213a, 213b are set to the mutually opposed position of a pair of connecting portion 21a, 21b.In addition, notch section Y-axis negative direction side that is, the back side side 12c of LED12 is arranged in 213a, 213b, and the Y of LED12 is arranged in conducting parts 30-a, 30-b Axis positive direction side that is, the side light-emitting surface 12a1.Pan portion 20 is connected from the vertical view visual angle from Z axis positive direction side, with one The mode of region 50a, 50b, 50c, 50d, 50e overlapping divided installs LED12.Specifically, LED12 utilizes defined region (region 50a, 50e) covers notch section 213a, 213b of interconnecting piece 21a, 21b.In other words, interconnecting piece 21a, 21b is included It overlooks in visual angle not by the region (region other than region 50a, 50e) of the defined region overlay of LED12.

In addition, by solder 60a, 60b by interconnecting piece 21a, 21b not by the side in the region covered and LED12 LED12 12d, 12e (referring to Fig. 7) and back side 12c are fixed.That is, the side for connecting the pan portion 20 and bottom surface 12b relative to LED12 and intersecting Face that is, side 12d, 12e and back side 12c connection.In other words, by having the region not covered by LED12, so as to Enough make the fixed transfiguration of the solder of interconnecting piece 21a, 21b and LED12 easy.

In addition, LED12 fixed in a manner of covering notch section 213a, 213b, so that solder 60a, 60b can only exist It is expanded on interconnecting piece 21a, 21b, solder 60a, 60b is avoided to expand to the side notch section 213a, 213b.Stated differently, since solder 60a, 60b can will not be expanded in the bottom surface 12b (referring to Fig. 7) of LED12, so floating for LED12 can be prevented, and then can Realize the further lightening of planar illuminating device 1.

In addition, as shown in fig. 6, LED12 includes a pair of terminal 24a, 24b for being separately positioned on the side side 12d, 12e.End Sub- 24a is anode terminal, and is connect in the 50a of region with interconnecting piece 21a.In addition, terminal 24b is cathode terminal, and in region It is connect in 50e with interconnecting piece 21b.In addition, be connected with the interconnecting piece 21a of terminal 24a with from side 12d protruding portion 70a outstanding Connection.In addition, the interconnecting piece 21b for being connected with terminal 24b is connect with from side 12e protruding portion 70b outstanding.In other words, even Pan portion 20 is connect to connect with protruding portion 70a and protruding portion 70b.

Specifically, as shown in fig. 6, the side 12d of LED12 is made of three faces.More specifically, side 12d is by 12d1, the second face 12d2 and third face 12d3 are constituted on one side.First face 12d1 is the face of the side light-emitting surface 12a1, and is along opposite In the face that light-emitting surface 12a1 orthogonal direction (Y direction) extends.Second face 12d2 is in Y-axis negative direction side and the first face 12d1 Continuous face, and be the face extended along the direction (X-direction) substantially parallel relative to light-emitting surface 12a1.Third face 12d3 be X-axis positive direction side and the second continuous face face 12d2, and extended along the direction (Y direction) orthogonal relative to light-emitting surface 12a1 Face.In addition, third face 12d3 is continuous in Y-axis negative direction side and the face 12cd of a part of the peripheral end portion as back side 12c Face.In addition, the face 12cd of a part is to remove overleaf the side region Chong Die with side 12a and a part in the 12c of the back side Face 12ce except region.Above-mentioned protruding portion 70a is by the second face 12d2, third face 12d3 and the face 12cd structure of a part At.In addition, as shown in fig. 6, the shape of the terminal 24a of LED12 is by constituting the three of protruding portion 70a faces (the second face 12d2, Three face 12d3 and a part face 12cd) formed vertical view "U" font.

In addition, as shown in fig. 6, the side 12e of LED12 is made of three faces.Specifically, side 12e is by the first face 12e1, the second face 12e2 and third face 12e3 are constituted.First face 12e1 is the face of the side light-emitting surface 12a1, and is along relative to hair The face that smooth surface 12a1 orthogonal direction (Y direction) extends.Second face 12e2 is continuous in Y-axis negative direction side and the first face 12e1 Face, and be the face extended along the direction (X-direction) substantially parallel relative to light-emitting surface 12a1.Third face 12e3 is in X-axis Negative direction side and the second continuous face face 12e2, and extended along the direction (Y direction) orthogonal relative to light-emitting surface 12a1 Face.In addition, third face 12e3 is continuous in Y-axis negative direction side and the face 12ce of a part of the peripheral end portion as back side 12c Face.In addition, the face 12ce of a part is to remove the overleaf side region Chong Die with side 12a and above-mentioned in the 12c of the back side Region except the face 12cd of a part.Above-mentioned protruding portion 70b is by the second face 12e2, third face 12e3 and the face of a part 12ce is constituted.In addition, as shown in fig. 6, the shape of the terminal 24b of LED12 is by constituting the three of protruding portion 70b faces (the second face 12e2, third face 12e3 and a part face 12ce) formed vertical view "U" font.

In addition, the shape of notch section 213a, 213b are the matched shapes of shape with terminal 24a, 24b for overlooking "U" font Shape.Notch section 213a, 213b of interconnecting piece 21a, 21b are covered by overlooking terminal 24a, 24b of "U" font as a result, therefore It can be easy and be accurately proceed positioning of the LED12 relative to connection pan portion 20.In addition, the shape of notch section 213a, 213b Shape can be matched with the shape of terminal 24a, 24b and arbitrarily be set, for example, the shape of terminal 24a, 24b are in addition to overlooking "U" It can also in a bird's eye view be U-shaped, V shape other than font.

Next, being illustrated using Fig. 7 to the section with the line B-B cutting of Fig. 6.Fig. 7 is embodiment party The cross-sectional view of FPC14 involved in formula (FPC14 for being equipped with the state of LED12).As shown in fig. 7, LED12 by solder 60a, 60b fixes third face 12d3, the 12e3 for constituting protruding portion 70a, 70b and interconnecting piece 21a, 21b.Though in addition, not showing in Fig. 7 Out, but as described above, in addition to third face 12d3,12e3, constitute protruding portion 70a, 70b second face 12d2,12e2 and Face 12cd, 12ce of a part are fixed also by solder 60a, 60b.

Specifically, for LED12, constitute protruding portion 70a the second face 12d2 and third face 12d3 and one The face 12cd divided is fixed by solder 60a and interconnecting piece 21a, constitutes the second face 12e2 and the third face of protruding portion 70b 12e3 and the face 12ce of a part are fixed by solder 60b and interconnecting piece 21b.In other words, LED12 will be relative to bottom surface Side (side 12d, 12e and back side 12c) that 12b intersects is fixed with the mounting surface 14a of FPC14.As a result, due to not needing Solder is set between bottom surface 12b and mounting surface 14a, so can prevent as caused by solder upwards (Z axis positive direction side) Float, therefore can be realized the further lightening of planar illuminating device 1.

In addition, in Fig. 7, the case where being considered as rectangular-shaped LED12 to section, is illustrated, but LED12 is not limited to It is rectangular-shaped.LED12 is illustrated for the case where other shapes using Fig. 8 and Fig. 9.

Fig. 8 and Fig. 9 is the cross-sectional view of FPC14 involved in variation.As shown in figure 8, side can also be included with LED12 The a part of (third face 12d3, the 12e3) of face 12d, 12e is provided with notch section 12da, 12ea made of notch, to fill this The mode of notch section 12da, 12ea of sample are fixed by solder 60a, 60b.

In this case, notch section 12da, 12ea is preferably disposed on position corresponding with interconnecting piece 21a, 21b.Tool For body, notch section 12da, 12ea are preferably removed the end of the side near the light-emitting surface 12a1 of interconnecting piece 21a, 21b.This Sample, by setting solder 60a, 60b until notch section 12da, 12ea are fixed, thus enhance the installation strength of LED12, It can be realized narrow frame.

In addition, as shown in figure 9, solder 60a, 60b only can also be arranged in the inside of notch section 12da, 12ea.For example, energy Enough by being manufactured being removed from the part that side 12d, 12e overflow after notch section 12da, 12ea fill solder 60a, 60b.

So, it is possible to reduce the area in the vertical view visual angle of interconnecting piece 21a, 21b (can especially shorten in X-direction Length), the quantity of the LED12 of the per unit length in the longitudinal direction of FPC14 can be increased.

As described above, planar illuminating device 1 involved in embodiment has: light guide plate 13, LED12 (the one of light source A example), FPC14 (example of substrate) and wiring 40.Light guide plate 13 goes out the light emission from incidence surface 13c incidence.It is more A LED12 configuration issues light from light-emitting surface 12a1 in the side incidence surface 13c.FPC14 has to be handed over the light-emitting surface 12a1 of same LED12 The bottom surface 12b of fork it is opposed and for LED12 installation mounting surface 14a.Wiring (wiring 40-1~22, cloth coiling 40-1a, 40-11a, 40-12a, 40-22a) it is formed in the opposing face 14b with mounting surface 14a opposite side of FPC14, multiple LED12 are connected and are connected It connects.

Cloth will be used for by, which not needing as a result, is set to mounting surface 14a around the space of wiring, therefore can make in connection pan portion The region of the outer rim of the upper and lower sides (Y direction) of 20-1~20 narrows.In other words, the planar light involved in embodiment In device 1, the short side direction of FPC14 that is, the length of Y direction can be shortened, therefore can be realized further narrow frame Change.

In addition, the utility model is not limited by above embodiment.Above-mentioned each composition element is appropriately combined and is constituted Mode be also contained in the utility model.In addition, by those skilled in the art can easily derive further effect, Variation.Therefore, the wider mode of the utility model is not limited by above-mentioned embodiment, is able to carry out various changes.

Claims (9)

1. a kind of planar illuminating device, which is characterized in that have:

Light guide plate goes out the light emission from incidence surface incidence；

Multiple light sources, they are configured at the incidence surface side, and issue the light from light-emitting surface；

Substrate, with mounting surface, the mounting surface is with opposed with the bottom surface of the light source that the light-emitting surface intersects, and described in supplying Light source installation；And

Wiring, is formed in the opposing face with the mounting surface opposite side of the substrate, and the multiple light source is connected Connection.

2. planar illuminating device according to claim 1, which is characterized in that be also equipped with:

Pan portion is connected, is set to the mounting surface, and connect with the terminal of the light source；With

Conducting parts are set to the connection pan portion, and the opposite face of the connection pan portion are electrically connected.

3. planar illuminating device according to claim 2, which is characterized in that

The side of the light source relative to bottom surface intersection and the connection pan portion connect.

4. planar illuminating device according to claim 3, which is characterized in that

The light source includes

Protruding portion, it is prominent from the side for being respectively relative to the light-emitting surface and bottom surface intersection in the side,

The connection pan portion is connect with the protruding portion.

5. the planar illuminating device according to any one of claim 2~4, which is characterized in that

The connection pan portion has a pair of connecting portion, they and be separately positioned on relative to the light-emitting surface and the bottom surface point A pair of terminal of the side for the light source not intersected connects,

The notch section that there is the pair of interconnecting piece mutually opposed position to be formed notch,

The light source is in a bird's eye view with notch section described in defined region overlay.

6. planar illuminating device according to claim 5, which is characterized in that

The interconnecting piece includes

Forethiga is formed in the light guide plate side relative to the notch section；With

Arm afterwards, relative to the notch section be formed in the forethiga opposite side, and region area is than the forearm Portion is small,

The conducting parts are set to the forethiga.

7. planar illuminating device according to claim 5, which is characterized in that

The interconnecting piece has in a bird's eye view not by the region of the defined region overlay.

8. planar illuminating device according to claim 6, which is characterized in that

The interconnecting piece has in a bird's eye view not by the region of the defined region overlay.

9. a kind of planar illuminating device, which is characterized in that have:

Light guide plate goes out the light emission from incidence surface incidence；

Multiple light sources, they are configured at the incidence surface side, and issue the light from light-emitting surface；

Substrate has the mounting surface for light source installation；

Wiring, is formed in the opposing face with the mounting surface opposite side of the substrate, and the multiple light source is connected Connection；

Pan portion is connected, is set to the mounting surface, and connect with the terminal of the light source；And

Conducting parts are set to the connection pan portion, and the opposite face of the connection pan portion are electrically connected,

The wiring is only arranged at the opposing face, and connect with the conducting parts.