CN109188768A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN109188768A CN109188768A CN201811158191.9A CN201811158191A CN109188768A CN 109188768 A CN109188768 A CN 109188768A CN 201811158191 A CN201811158191 A CN 201811158191A CN 109188768 A CN109188768 A CN 109188768A
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- circuit board
- electrode
- backlight module
- pin
- light
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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
-
- 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
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of backlight module and display devices, comprising: lamp bar and light guide plate；Light guide plate includes incidence surface and light-emitting surface；Lamp bar includes: first circuit board and multiple lamp beads；Plane is perpendicular to plane where light guide plate where first circuit board；The side of first circuit board towards lamp bead includes multiple pin units；Pin units include P electrode pin and N electrode pin；Lamp bead includes: PN junction diode, P electrode, N electrode, encapsulated layer；P electrode and N electrode are located at PN junction diode towards the side of first circuit board；P electrode is connected by the first conductive part with P electrode pin, and N electrode is connected by the second conductive part with N electrode pin；Lamp bead has light-emitting surface and at least one side, and side and light-emitting surface connect；The incidence surface of the light-emitting surface of lamp bead towards light guide plate is arranged；Encapsulated layer covers side and exposes light-emitting surface.Compared with the existing technology, the narrow frame for being conducive to backlight module promotes the quality of backlight module.
Description
Technical field
The present invention relates to field of display technology, more particularly, to a kind of backlight module and display device.
Background technique
Liquid crystal display device (Liquid Crystal Display, LCD) has thin fuselage, power saving, radiationless etc. numerous
Advantage is widely used, such as mobile phone, digital camera, computer screen or laptop screen.Existing skill
The display device that art provides includes shell, and is arranged in the intracorporal backlight module of shell.Its working principle of traditional display device
It is to control the rotation of the liquid crystal molecule of liquid crystal layer by applying driving voltage on two panels glass substrate, by the light of backlight module
Line reflects generation picture.Since liquid crystal itself does not shine, the light source provided by backlight module is needed to show image, because
This, backlight module becomes one of the key component of liquid crystal display device.
Backlight module is divided into side entrance back module and two kinds of down straight aphototropism mode set according to the difference of light source incidence position.
Down straight aphototropism mode set is by illuminating source setting at liquid crystal layer rear, directly forms area source and is supplied to liquid crystal display device,
The thickness of down straight aphototropism mode set is larger, commonly used in large-sized display device.And side entrance back module is by backlight
At the back plate edges at the lamp bar setting panel side rear in source, the light that lamp bar issues enters leaded light from the incidence surface of light guide plate side
Plate projects after reflection and diffusion from light guide plate light-emitting surface, then via optical diaphragm group, provides light to form area source.
Side entrance back module is commonly used in the display device of small-medium size, continues to optimize the knot of side entrance back module
Structure, the side entrance back module for providing high-quality is one of research direction of research staff.
Summary of the invention
In view of this, the present invention provides a kind of backlight module and display devices.
The present invention provides a kind of backlight module, comprising: lamp bar and light guide plate；Light guide plate includes incidence surface and light-emitting surface, is entered
Smooth surface and light-emitting surface intersection；Lamp bar includes: first circuit board and multiple lamp beads；Plane is perpendicular to light guide plate where first circuit board
Place plane；The side of first circuit board towards lamp bead includes multiple pin units, and pin units and lamp bead one-to-one correspondence are electrically connected
It connects；Pin units include P electrode pin and N electrode pin；Lamp bead includes: PN junction diode, P electrode, N electrode, encapsulated layer；P
Electrode and N electrode are located at PN junction diode towards the side of first circuit board；P electrode passes through the first conductive part and P electrode pin
Connection, N electrode are connected by the second conductive part with N electrode pin；Lamp bead has light-emitting surface and at least one side, side
Connect with light-emitting surface；The incidence surface of the light-emitting surface of lamp bead towards light guide plate is arranged；Encapsulated layer covers side and exposes light-emitting surface.
The present invention also provides a kind of display devices, including backlight module provided by the invention and display panel；Display surface
The side of the light-emitting surface of light guide plate is arranged in plate.
Compared with prior art, backlight module provided by the invention and display device at least realize following beneficial effect
Fruit:
In the present invention by the direct piece of lamp bead on first circuit board.Specifically, being provided with P electrode in PN junction diode
And N electrode, P electrode and N electrode pass through that conductive part is directly electrically coupled to the P electrode pin of first circuit board and N electrode is drawn respectively
Foot.It is not necessary that PN junction diode to be encapsulated in lead frame, but directly by lamp bead piece on first circuit board, thus can subtract
The volume of small lamp bulb is conducive to the narrow frame of backlight module.Encapsulated layer only covers the side of lamp bead, without covering lamp bead
Light-emitting surface, thus it can be further reduced the width of non-display area, be further conducive to the narrow frame of backlight module.In lamp bead
No setting is required lead frame and encapsulated layer only cover the side of lamp bead, and the thermal diffusivity of lamp bead is preferable, improves the product of backlight module
Matter.It is not provided with gold thread in lamp bead, the reliability of lamp bead can be improved, to further promote the quality of backlight module.
Certainly, implementing any of the products of the present invention specific needs while must not reach all the above technical effect.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is a kind of the schematic diagram of the section structure for backlight module that the prior art provides；
Fig. 2 is the structural schematic diagram of light source in Fig. 1；
Fig. 3 is a kind of schematic perspective view of backlight module provided in an embodiment of the present invention；
Fig. 4 is a kind of the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the section structure of another backlight module provided in an embodiment of the present invention；
Fig. 6 is the partial structural diagram of another backlight module provided in an embodiment of the present invention；
Fig. 7 is the schematic diagram of the section structure of another backlight module provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the first circuit board of another backlight module provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the first circuit board of another backlight module provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of the section structure of another backlight module provided in an embodiment of the present invention；
Figure 11 is a kind of the schematic diagram of the section structure of display device provided in an embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is a kind of the schematic diagram of the section structure for backlight module that the prior art provides, and Fig. 2 is
The structural schematic diagram of light source in Fig. 1.
Research staff has found, in the backlight module that the prior art provides, including lamp bar 01 and light guide plate 02, lamp bar 01 include
Substrate 011 and light source 012, the light that light source 012 issues are entered inside light guide plate by the incidence surface 021 of light guide plate 02, then
It is emitted from the light-emitting surface 022 of light guide plate 02.Its volume of light source 012 is larger, causes the border width D0 of backlight module larger.Tool
Body, light source 012 includes lead frame 031, and lead frame 031 forms accommodating space, is provided with luminescence chip 032 in lead frame 031,
Luminescence chip 032 can emit beam after being powered.Light source 012 further includes chip electrode 033, and the outside of lead frame 031 is provided with
Light source electrodes 012, chip electrode 033 and light source electrodes 012 are electrically connected by gold thread 034.In the accommodating space of lead frame 031 also
Provided with the packaging plastic 036 containing fluorescent powder.
Research staff's discovery, uses side entrance back module, although reducing the thickness of display device, due to light source
012 volume is larger, increases the area that the non-display area of viewing area is surrounded in display device, is unfavorable for realizing display device
Narrow frame.Also, because gold thread 034 is easily broken off in light source 012, reliability is lower.And in light source 012, luminescence chip 032 week
It encloses and covers packaging plastic 036 and be arranged in the accommodating space of lead frame 031, the thermal diffusivity of light source 012 is poor.
Fig. 3 and Fig. 4 are please referred to, Fig. 3 is a kind of schematic perspective view of backlight module provided in an embodiment of the present invention, figure
4 be a kind of the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention.The present embodiment provides a kind of backlight module, packets
It includes:
Lamp bar 10 and light guide plate 20；
Light guide plate 20 includes incidence surface 21 and light-emitting surface 22, and incidence surface 21 and light-emitting surface 22 intersect；
Lamp bar 10 includes: first circuit board 11 and multiple lamp beads 12；
11 place plane of first circuit board is perpendicular to 20 place plane of light guide plate；First circuit board 11 towards lamp bead 12 one
Side includes multiple pin units 101, and pin units 101 and lamp bead 12 correspond electrical connection；Pin units 101 include P electrode
Pin 101P and N electrode pin 101N；
Lamp bead 12 includes: PN junction diode 121, P electrode 122, N electrode 123, encapsulated layer 124；P electrode 122 and N electrode
123 are located at PN junction diode 121 towards the side of first circuit board 11；
P electrode 122 is connected by the first conductive part 120A with P electrode pin 101P, and N electrode 123 passes through the second conductive part
120B is connected with N electrode pin 101N；
Lamp bead 12 has light-emitting surface 125 and at least one side 126, and side 126 and light-emitting surface 125 connect；
The incidence surface 21 of the light-emitting surface 125 of lamp bead 12 towards light guide plate 20 is arranged；
Encapsulated layer 124 covers side 126 and exposes light-emitting surface 125.
In backlight module provided in this embodiment, light guide plate 20 is generallyd use with high reflectivity and the not material of extinction
Production, light guide plate have multiple light guiding points (not illustrating in figure), and when light is mapped to each light guiding points, reflected light passes through light guiding points
It is spread toward different angle, and then destroys conditioned reflex and projected by light guide plate light-emitting surface.It can be with by the light guiding points on light guide plate 20
Make light guide plate uniformly light-emitting.Light guide plate includes incidence surface 21 and light-emitting surface 22, and lamp bar 10 can shine, when the light that lamp bar 10 issues
The incidence surface 21 that line enters light guide plate 20 is diffused by light guiding points later, then is projected by light-emitting surface 22.
Lamp bar 10 includes first circuit board 11 and multiple lamp beads 12, and first circuit board 11 has the function of transmission telecommunications number.
Optionally, first circuit board 11 can be printed circuit board, and printed circuit board is usually hard, is existed using terahertz wave quasi-optics
The conductive hole (such as pin units 101 of the present embodiment) that conductive pattern and electronic component are formed on printed circuit board, can be with
Realize that the electronic component on printed circuit board is connected with each other.
For first circuit board 11 towards the side of lamp bead 12, including multiple pin units 101, pin units 101 include P electrode
Pin 101P and N electrode pin 101N, pin units and lamp bead 12 correspond electrical connection, further, pin units 101
The electrical connection of the P electrode 122 of P electrode pin 101P and lamp bead 12, the N electrode pin 101N of pin units 101 and the N electricity of lamp bead 12
Pole 123 is electrically connected.
Lamp bead 12 includes PN junction diode 121, it is generally the case that different miscellaneous by spreading in the two sides of a block semiconductor
Matter is respectively formed N-type semiconductor and P-type semiconductor, and the intersection between N-type semiconductor and P-type semiconductor forms one very thin
Space-charge region, space-charge region is PN junction.Lamp bead further includes P electrode and N electrode, and P electrode and N electrode pass through conductive part
It is electrically connected with pin units 101.Specifically, conductive part may include the first conductive part 120A and the second conductive part 120B.
The P electrode of lamp bead is electrically connected by the first conductive part 120A and P electrode pin 101P, and N electrode 123 is led by second
Electric portion 120B and N electrode pin 101N electrical connection.Lamp bead 12 has light-emitting surface 125, incidence surface of the light-emitting surface 125 towards light guide plate
21 settings, the light of light-emitting surface 125 enters the incidence surface 21 of light guide plate, and is emitted by the light-emitting surface 22 of light guide plate, to provide
Uniform area source.
Lamp bead further includes at least one side 126, and side 126 and light-emitting surface 125 connect.Encapsulated layer 124 covers side
126, encapsulated layer 124 can not cover light-emitting surface 125 and expose light-emitting surface 125, and by such setting, encapsulated layer 124 will not
The light that the light-emitting surface 125 of lamp bead 12 issues is influenced, to improve the utilization rate of light.
In the present embodiment, by the direct piece of lamp bead 20 on first circuit board 11.Specifically, in PN junction diode 121
Provided with P electrode and N electrode, P electrode and N electrode pass through the P electrode that conductive part is directly electrically coupled to first circuit board 11 respectively
Pin 101P and N electrode pin 101N.Compared with the existing technology, backlight module provided in this embodiment at least has and following has
Beneficial effect:
1, it is not necessary that PN junction diode 121 to be encapsulated in lead frame, but directly by 20 piece of lamp bead in first circuit board
It on 11, thus can reduce the volume of lamp bead 20, be conducive to the narrow frame of backlight module.
2, encapsulated layer 124 only covers the side 126 of lamp bead, without covering the light-emitting surface 125 of lamp bead 12, thus can be into
One step reduces the width D 1 of non-display area, and the numerical value of D1 can be less than 2.0mm, further be conducive to the narrow frame of backlight module
Change.
3, no setting is required in lamp bead lead frame and encapsulated layer 124 only cover the side 126 of lamp bead, the thermal diffusivity of lamp bead
Preferably, the quality of backlight module is improved.
4, it is not provided with gold thread in lamp bead, the reliability of lamp bead can be improved, to further promote the quality of backlight module.
In some alternative embodiments, referring to FIG. 5, Fig. 5 is another backlight module provided in an embodiment of the present invention
The schematic diagram of the section structure.Lamp bead 12 includes fluorescent film 127, and fluorescent film 127 is located at PN junction diode 121 away from first circuit board
11 side.
Under normal circumstances, fluorescent film can promote luminance viewing angle, and in the present embodiment, fluorescent film setting deviates from first in PN junction
The side of circuit board 11, the characteristic that light can emit at random after being excited using fluorescent film Internal Fluorescent molecule, so as to
The brightness at the big visual angle of backlight module is promoted, display quality is promoted.
Optionally, the material of encapsulated layer 124 includes silica gel.Silica gel has good insulation performance, and chemical property is stablized, no
Burning can prevent PN junction diode 121 from leaking electricity.And silica gel has good mechanical performance, can protect PN junction diode
121。
In some alternative embodiments, Fig. 3 and Fig. 4 are please referred to, the first conductive part 120A and the second conductive part 120B's
Material includes: anisotropic conductive adhesive paste.
The side's of leading property conducting resinl can be between P electrode and P electrode pin 101P and N electrode and N electrode pin 101N are applied
Cloth, the side's of leading property conducting resinl have the function of that unilateal conduction and gluing are fixed, on the one hand lamp bead and first circuit board had both been made to be electrically connected
It connects, first circuit board provides suitable voltage for lamp bead；On the other hand again lamp bead is fixedly connected with first circuit board, makes lamp
Pearl is not easy to be detached from from first circuit board.
In some alternative embodiments, Fig. 6 and Fig. 7 are please referred to, Fig. 6 is another backlight provided in an embodiment of the present invention
The partial structural diagram of mould group, Fig. 7 are the schematic diagram of the section structure of another backlight module provided in an embodiment of the present invention.The
One circuit board 11 includes multiple terminal units 102 away from the side of lamp bead 12, and terminal unit 102 includes P terminal 102P and N-terminal
102N；
Terminal unit 102 and pin units 101 correspond electrical connection, and P terminal 102P and P electrode pin 101P are electrically connected
It connects, N-terminal 102N and N electrode pin 101N electrical connection；
Backlight module further includes second circuit board 30；
Second circuit board 30 includes bonding pad 31, and bonding pad 31 and light guide plate 20 are arranged in parallel；Believe including a item bonding pad 31
Number line 310；
Terminal unit 102 and signal wire 310 are electrically connected by conductive connection part 32；
Wherein, a is positive integer.
In the present embodiment, backlight module includes second circuit board 30, and second circuit board 30 and light guide plate 22 are arranged in parallel, the
Two circuit boards 30 include bonding pad 31, and bonding pad 31 and light guide plate 22 are arranged in parallel.Bonding pad 31 is for being electrically connected the first circuit
Plate 11.
Bonding pad 31 includes a signal line, and signal wire is used to provide electric signal to lamp bead.In the present embodiment, only with a=2
For be illustrated.
Optionally, second circuit board 30 further includes bent area 32, curved when backlight module is applied in terminal display device
Folding area 32 can be bending state.
In the present embodiment, terminal unit 102 and signal wire 310 are electrically connected by conductive connection part 32, optionally, conductive part
120 are located at the side that first circuit board 11 deviates from lamp bead 12.Since conductive part 120 is located at first circuit board 11 away from lamp bead 12
Side, thus the space being not take up between two adjacent lamp beads are conducive to that more intensive, promotion unit plane for lamp bead is arranged
The quantity of lamp bead in product.
It should be noted that the technical solution in order to clearly illustrate the present embodiment, conductive part 32 is omitted in Fig. 6.
In backlight module provided in this embodiment, on the one hand conductive part plays conductive effect, so that 102 He of terminal unit
Signal wire 310 is electrically connected；On the other hand, conductive part 32 plays the role of support, so that first circuit board 11 and second circuit board
Plane where 30 is orthogonal, prevents first circuit board 11 from tilting, to be further reduced the frame of backlight module.
Optionally, the material of conductive part 120 is scolding tin, and scolding tin is a kind of lower melting-point brazing metal, in electronic homework
When, it can be to electric iron electrical contact scolding tin and electronic component, and welding electronic component.
Optionally, second circuit board 30 is flexible circuit board.Flexible circuit board can be bent and fold without damaging conducting wire,
Conducting wire can arbitrarily arrange according to space layout, to reach component and conducting wire connecting integration, flexible circuit board can contract
The volume and weight of small backlight module can preferably improve the reliability of backlight module.
In some alternative embodiments, please refer to Fig. 6, Fig. 7 and Fig. 8, Fig. 8 be it is provided in an embodiment of the present invention another
The structural schematic diagram of the first circuit board of backlight module.In some optional implementations of the present invention, multiple pin units 101
It is divided into a pin set 40, each pin set 40 includes at least two pin units 101；
First circuit board 11 includes a P connecting line 51 and a N connecting line 52；
In same pin set 40,51 electricity of P electrode pin 101P and same P connecting line of at least two pin units 101
N electrode pin 101N and same the N connecting line 52 of connection, at least two pin units 101 is electrically connected.
It is only illustrated so that a=2 and each pin set 40 include two pin units 101 as an example in the present embodiment.It can be with
Understand, a is positive integer, and a can be 1,3,4 etc., and each pin set 40 may include three or drawing above
Foot unit 101, the present embodiment no longer repeat one by one.
In the present embodiment, pin units 101 are grouped and are arranged, P electrode pin 101P in same pin set 40 and same
P connecting line 51 is electrically connected, and the N electrode pin 101N and same N connecting line 52 in same pin set 40 are electrically connected.As,
The lamp bead that same pin set 40 is electrically connected be it is concatenated, lamp bead that same pin set 40 is electrically connected is luminous simultaneously or puts out
It goes out.On the one hand, it can be controlled separately the lamp bead that different pin sets 40 are electrically connected, enrich the function of backlight module；On the other hand,
The lamp bead that same pin set 40 is electrically connected only needs to provide one group of electric signal, so as to reduce the port of electric signal, simplifies back
The structure of optical mode group.
Also, in the present embodiment, P connecting line 51 and N connecting line 52 are arranged in first circuit board 11, then the second electricity
No setting is required in road plate 30 P connecting line 51 and N connecting line 52.Only setting signal line 310, signal wire 310 are P to second circuit board 30
52 transmission telecommunications number of connecting line 51 and N connecting line, to greatly simplify the Wiring structure of second circuit board 30.Due to second
The Wiring structure of circuit board 30 is simple, thus the width W of bonding pad 31 can be set relatively narrow, and the value of W can be less than 1.0mm,
To further reduce the border width of backlight module, be conducive to the narrow frame of backlight module.
It should be noted that pin units 101 can not be grouped setting, in the following, the present invention is carried out by taking a=1 as an example herein
Explanation.In some alternative embodiments, Fig. 6, Fig. 7 and Fig. 9 are please referred to, Fig. 9 is another back provided in an embodiment of the present invention
The structural schematic diagram of the first circuit board of optical mode group.In backlight module provided in this embodiment, multiple pin units 101 are one
P electrode pin 101P and same the P connecting line 51 of group, multiple pin units 101 is electrically connected, the N electricity of multiple pin units 101
Pole pin 101N and same N connecting line 52 is electrically connected.Multiple lamp beads in backlight module provided in this embodiment, in lamp bar 10
12 series connection, multiple lamp beads 12 shine or extinguish simultaneously.Backlight module only needs to provide one group of electric signal, so as to further subtract
The port of few electric signal, simplifies the structure of backlight module.
It should be noted that Fig. 8 and Fig. 9 only does illustrative explanation for the grouping situation of pin units 101.
Optionally, second circuit board 30 only includes one layer of conductive layer, and a signal line 310 is located at conductive layer.Due to the second electricity
Wiring structure is simple in road plate 30, thus one layer of conductive layer of setting is only needed to simplify the second electricity for making a signal line 310
The film layer structure of road plate 30, and save the manufacturing process and material of production second circuit board 30.Also, due to second circuit
The film layer structure of plate 30 simplifies, and can promote the flexibility of second circuit board 30, reduces the removing of each film layer of second circuit board 30
Risk.
In some alternative embodiments, referring to FIG. 10, Figure 10 is another backlight mould provided in an embodiment of the present invention
The schematic diagram of the section structure of group.
In the present embodiment, backlight module further includes framework 61, reflector plate 62, prismatic lens 63, lower diffusion sheet 64 and upper diffusion
Piece 65；
Framework 61 forms accommodating space for accommodating lamp bar 10, light guide plate 20, reflector plate 62, prismatic lens 63, lower diffusion sheet
64 and upper diffusion sheet 65；
Reflector plate 62, light guide plate 20, lower diffusion sheet 64, prismatic lens 63, upper diffusion sheet 65 stack gradually setting.
In backlight module provided in this embodiment, diffusion sheet working principle is to borrow the refraction for having diffusate and reflection by light
Source atomization, and light is gone out into light by low-angle and focuses on front to improve frontal luminance.Lower diffusion sheet will mainly be sent out from light guide plate
Light out, which is put together, uniformly to be projected on prismatic lens, and the main function of upper diffusion sheet is the optical haze for projecting prismatic lens,
And light is uniformly appeared, while upper expansion can also be played the role of protecting prismatic lens.
The present invention also provides a kind of display devices, including backlight module provided by the invention and display panel；Display
The side of the light-emitting surface 22 of light guide plate 20 is arranged in panel.It is provided in an embodiment of the present invention one incorporated by reference to reference Figure 11, Figure 11
The schematic diagram of the section structure of kind display device, the display device that Figure 11 is provided include the backlight mould that any embodiment of the present invention provides
Group 100 and display panel 200.Backlight module 100 is that display panel 200 provides area source.Display panel 200 can be liquid
LCD panel, the present embodiment repeat no more the specific structure of display panel 200 at this.
In addition to this, display device provided in this embodiment can also be terminal installation, such as mobile phone, computer, TV, vehicle
Other display devices having a display function, the present invention such as display device is carried to be not specifically limited this.The embodiment of the present invention mentions
The display device of confession, the beneficial effect with backlight module provided in an embodiment of the present invention, can specifically refer to above-mentioned each implementation
Example illustrating for backlight module, details are not described herein for the present embodiment.
Through the foregoing embodiment it is found that the various embodiments described above of the present invention provide backlight module and display device, at least in fact
Showed it is following the utility model has the advantages that
In the present invention by the direct piece of lamp bead on first circuit board.Specifically, being provided with P electrode in PN junction diode
And N electrode, P electrode and N electrode pass through that conductive part is directly electrically coupled to the P electrode pin of first circuit board and N electrode is drawn respectively
Foot.Compared with the existing technology, it is not necessary that PN junction diode to be encapsulated in lead frame, but directly by lamp bead piece in the first circuit
It on plate, thus can reduce the volume of lamp bead, be conducive to the narrow frame of backlight module.Encapsulated layer only covers the side of lamp bead,
Without covering the light-emitting surface of lamp bead, thus it can be further reduced the width of non-display area, further be conducive to backlight module
Narrow frame.No setting is required in lamp bead lead frame and encapsulated layer only cover the side of lamp bead, and the thermal diffusivity of lamp bead is preferable,
Improve the quality of backlight module.It is not provided with gold thread in lamp bead, the reliability of lamp bead can be improved, to further promote backlight
The quality of mould group.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (13)
1. a kind of backlight module characterized by comprising
Lamp bar and light guide plate；
The light guide plate includes incidence surface and light-emitting surface, and the incidence surface and the light-emitting surface intersect；
The lamp bar includes: first circuit board and multiple lamp beads；
Plane where the first circuit board is perpendicular to plane where the light guide plate；The first circuit board is towards the lamp bead
Side include multiple pin units, the pin units and the lamp bead correspond electrical connection；The pin units include P
Electrode pin and N electrode pin；
The lamp bead includes: PN junction diode, P electrode, N electrode, encapsulated layer；The P electrode and the N electrode are located at the PN
Junction diode is towards the side of the first circuit board；
The P electrode is connected by the first conductive part with the P electrode pin, and the N electrode passes through the second conductive part and the N
Electrode pin connection；
The lamp bead has light-emitting surface and at least one side, and the side and the light-emitting surface connect；
The incidence surface of the light-emitting surface of the lamp bead towards the light guide plate is arranged；
The encapsulated layer covers the side and exposes the light-emitting surface.
2. backlight module according to claim 1, which is characterized in that
The lamp bead includes fluorescent film, and the fluorescent film is located at the side that the PN junction diode deviates from the first circuit board.
3. backlight module according to claim 2, which is characterized in that
The material of first conductive part and second conductive part includes: anisotropic conductive adhesive paste.
4. backlight module according to claim 1, which is characterized in that
The first circuit board includes multiple terminal units away from the side of the lamp bead, and the terminal unit includes P terminal and N
Terminal；
The terminal unit and the pin units correspond electrical connection, the P terminal and P electrode pin electrical connection,
N-terminal and N electrode pin electrical connection；
The backlight module further includes second circuit board；
The second circuit board includes bonding pad, and the bonding pad and the light guide plate are arranged in parallel；The bonding pad includes a item
Signal wire；
The terminal unit and the signal wire are electrically connected by conductive connection part；
Wherein, a is positive integer.
5. backlight module according to claim 4, which is characterized in that
The multiple pin units are divided into a pin set, and each pin set includes at least two pin units；
The first circuit board includes a P connecting line and a N connecting line；
In the same pin set, the P electrode pin of at least two pin units is connected with P described in same
Line is electrically connected, the electrical connection of N connecting line described in the N electrode pin and same of at least two pin units.
6. backlight module according to claim 5, which is characterized in that
The conducting position deviates from the side of the lamp bead in the first circuit board.
7. backlight module according to claim 5, which is characterized in that
The material of the conductive part is scolding tin.
8. backlight module according to claim 1, which is characterized in that
The material of the encapsulated layer includes silica gel.
9. backlight module according to claim 1, which is characterized in that
The first circuit board is printed circuit board.
10. backlight module according to claim 5, which is characterized in that
The second circuit board is flexible circuit board.
11. backlight module according to claim 5, which is characterized in that
The second circuit board only includes one layer of conductive layer, and a signal line is located at the conductive layer.
12. backlight module according to claim 1, which is characterized in that
The backlight module further includes framework, reflector plate, prismatic lens, lower diffusion sheet and upper diffusion sheet；
The framework forms accommodating space for accommodating the lamp bar, the light guide plate, the reflector plate, the prismatic lens, institute
State lower diffusion sheet and the upper diffusion sheet；
The reflector plate, the light guide plate, the lower diffusion sheet, the prismatic lens, the upper diffusion sheet stack gradually setting.
13. a kind of display device, which is characterized in that including according to claim 1-12 described in any item backlight modules, and
Display panel；
The side of the light-emitting surface of the light guide plate is arranged in the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158191.9A CN109188768B (en) | 2018-09-30 | 2018-09-30 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158191.9A CN109188768B (en) | 2018-09-30 | 2018-09-30 | Backlight module and display device |
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| CN109188768A true CN109188768A (en) | 2019-01-11 |
| CN109188768B CN109188768B (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811158191.9A Active CN109188768B (en) | 2018-09-30 | 2018-09-30 | Backlight module and display device |
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| CN110824766A (en) * | 2019-10-25 | 2020-02-21 | 武汉华星光电技术有限公司 | Backlight structure, manufacturing method thereof and display device |
| WO2021036820A1 (en) * | 2019-09-01 | 2021-03-04 | 王定锋 | Elongated flexible panel light and manufacturing method therefor |
| CN113568219A (en) * | 2020-04-28 | 2021-10-29 | 华为技术有限公司 | Backlight and display device |
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| Publication number | Publication date |
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| CN109188768B (en) | 2021-09-28 |
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