CN105301843B - A kind of backlight module and display module - Google Patents

A kind of backlight module and display module Download PDF

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Publication number
CN105301843B
CN105301843B CN201510852685.7A CN201510852685A CN105301843B CN 105301843 B CN105301843 B CN 105301843B CN 201510852685 A CN201510852685 A CN 201510852685A CN 105301843 B CN105301843 B CN 105301843B
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CN
China
Prior art keywords
area
guide plate
light guide
circuit board
backlight module
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Application number
CN201510852685.7A
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Chinese (zh)
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CN105301843A (en
Inventor
谢晨
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN201510852685.7A priority Critical patent/CN105301843B/en
Publication of CN105301843A publication Critical patent/CN105301843A/en
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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081Mechanical 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
    • G02B6/0086Positioning aspects
    • G02B6/009Positioning aspects of the light source in the package
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side

Abstract

The invention discloses a kind of backlight module and display module, the backlight module includes circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, wherein circuit board includes the second area for setting the first area of lamp bar and connection light guide plate, lamp bar is installed on the front of the first area of circuit board, double faced adhesive tape is arranged on the front of second area to connect circuit board and light guide plate, the front of first area and the front of second area are in step-like setting so that lamp bar be installed on the side of circuit board and light guide plate be connected to circuit board side it is concordant.The backlight module of the application has higher light coupling efficient.

Description

A kind of backlight module and display module
Technical field
The present invention relates to display technology field, more particularly to a kind of backlight module and display module.
Background technology
Wide variety of display device is mainly made up of display panel and backlight module.Backlight module provides for display panel Backlight, and mainly include lamp bar and light guide plate in backlight module, lamp bar emits beam uniform into light guide plate, light guide plate outgoing Light is supplied to display panel.Light coupling efficient between lamp bar and light guide plate reflects the utilization rate of luminous energy, and has influence on the back of the body The brightness of light.Nowadays increasing research is carried out towards the direction for improving light coupling efficient.
In current backlight module, due to the limitation in structure, cause the incidence surface of light guide plate can not cover all Some emergent ray of the exiting surface of lamp bar, i.e. lamp bar is introduced into light guide plate, causes the waste of luminous energy, lamp bar and light guide plate Between light coupling efficient it is low the problem of.
The content of the invention
The present invention proposes a kind of backlight module and display module, to solve coupling light between lamp bar and light guide plate in the prior art The problem of less efficient.
In order to solve the above technical problems, the present invention proposes a kind of backlight module, it include circuit board, lamp bar, light guide plate with And light guide plate double faced adhesive tape, wherein circuit board include the second area for setting the first area of lamp bar and connection light guide plate;Lamp bar is pacified The front of first area loaded on circuit board, light guide plate double faced adhesive tape are arranged at the front of second area to connect circuit board and leaded light Plate, the front of first area and the front of second area are in step-like setting, so that lamp bar is installed on the side of circuit board with leading The side that tabula rasa is connected to circuit board is concordant.
Wherein, the thickness of first area is more than the thickness of second area, the back side of first area and the back side of second area Concordantly.
Wherein, the thickness of the first area of circuit board is H1, the thickness of the second area of circuit board is H2, light guide plate is two-sided The thickness of glue is H0, wherein H1-H2=H0
Wherein, circuit board is flexible PCB, and the thickness of the first area of circuit board is H1, the second area of circuit board Thickness is H2, the thickness of light guide plate double faced adhesive tape is H0, wherein H1-H2> H0
Wherein, backlight module further comprises glue frame and glue frame double faced adhesive tape, and circuit board includes the 3rd region of connection glue frame, Glue frame double faced adhesive tape is arranged at the front in the 3rd region to connect circuit board and glue frame.
Wherein, the thickness in the 3rd region is identical with the thickness of first area.
Wherein, backlight module further comprises reflector plate, and reflector plate is arranged on the downside of lamp bar and light guide plate.
Wherein, backlight module further comprises shading glue, and shading glue is arranged on the back side of circuit board, for prevent lamp bar and The light that light guide plate projects is projected by the back side of circuit board.
In order to solve the above technical problems, the present invention also provides a kind of display module, the display module includes panel, Yi Jishang State backlight module.
Wherein, panel is liquid crystal panel.
The invention has the advantages that being different from prior art, backlight module includes circuit board, lamp bar, led in the present invention Tabula rasa and light guide plate double faced adhesive tape, wherein circuit board include the second area for setting the first area of lamp bar and connection light guide plate, Lamp bar is installed on the front of the first area of circuit board, and double faced adhesive tape is arranged on the front of second area to connect circuit board and leaded light Plate, the front of first area and the front of second area are in step-like setting, so that concordant with the upside of light guide plate on the upside of lamp bar.Lead Tabula rasa is connected on circuit boards by light guide plate double faced adhesive tape, is fixed with lamp bar position, be ensure that the higher coupling light efficiency of horizontal direction Rate;It is concordant with the upside of lamp bar on the upside of light guide plate, also ensure that light coupling efficient higher on vertical direction, i.e., lamp bar and light guide plate it Between there is higher light coupling efficient, improve the utilization rate of light.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of backlight module one of the present invention;
Fig. 2 is the schematic diagram of light guide plate double faced adhesive tape and glue frame double faced adhesive tape in the embodiment of backlight module one shown in Fig. 1;
Fig. 3 is the structural representation of the embodiment of display module one of the present invention.
Embodiment
Refering to Fig. 1, Fig. 1 is the structural representation of the embodiment of backlight module one of the present invention, backlight mould in present embodiment Group 100 includes circuit board 11, lamp bar 12, light guide plate 13 and light guide plate double faced adhesive tape 14.
Backlight module 100 is applied in display module, is mainly used in providing light source, wherein circuit board 11 is not used to carry For light source, but for carrying lamp bar 12 and light guide plate 13, itself function is then to carry out signal control to display module.
In present embodiment, lamp bar 12 is LED light source, is made up of multiple LED grains, projects light and enters light guide plate 13, Again uniform light is provided by light guide plate 13.In the process, the light projected into light and the lamp bar 12 of light guide plate 13 it Between ratio be then optical coupling rate between lamp bar 12 and light guide plate 13, optical coupling rate has reacted the utilization rate of light, in backlight mould Group design field, it is always its improved target to improve light utilization efficiency.Backlight module 100 is then the design by configuration aspects, Enable the light as much as possible for receiving lamp bar 12 and sending of light guide plate 13, improve the optical coupling between lamp bar 12 and light guide plate 13 Rate, to improve light utilization efficiency.
Specifically, circuit board 11 includes being provided with the first area 111 of lamp bar 12, and the second of connection light guide plate 13 Region 112.Lamp bar 12 is welded on the front of first area 111, and light guide plate 13 is by being arranged on 112 positive leaded light of second area Plate double faced adhesive tape 14 is connected to light guide plate 11.The front of the first area 111 of circuit board 11 and the front of second area 112 are in step-like Set so that the side (upside of lamp bar 12) that lamp bar 12 is installed on circuit board 11 is connected to the side of circuit board 11 with light guide plate 13 (upside of light guide plate 13) is concordant.
Wherein, the upside of lamp bar 12 can regard the front for being close to first area 111 as, and the upside of light guide plate 13 and second area 112 front is across light guide plate double faced adhesive tape 14.If positive positive concordant, the lamp bar with second area 112 of first area 111 The light that the part of the thickness of light guide plate double faced adhesive tape 14 is sent on 12 cannot be introduced into light guide plate 13, in the vertical direction optical coupling rate It is low.Therefore in the present embodiment, the front of first area 111 and the front of second area 112 are in step-like setting, light guide plate Double faced adhesive tape 14 sets the front of second area 112, that is, is arranged at step, when light guide plate 13 is connected by light guide plate double faced adhesive tape 14 When on circuit board 11, its upside can be concordant with the upside of lamp bar 12, improves the optical coupling rate on vertical direction.
As circuit board 11, in general, what the back side of its first area 111 and second area 112 was generally flush with, and first The front in region 111 and the front of second area 112 are in step-like setting, the thickness H of corresponding first area 1111More than The thickness H in two regions 1122.Optimally, if the thickness of light guide plate double faced adhesive tape 14 is H0, then the thickness in circuit board 11 Relation meets below equation H1-H2=H0.In this case no matter light guide plate 13, which is part, is connected to second area 112, or complete The full second area 112 that is connected to can guarantee that its upside is concordant with the upside of lamp bar 12.But in this case, because light guide plate is double The material of face glue 14 is softer, and the material of circuit board 11 is relatively hard, and the thickness and precision of light guide plate double faced adhesive tape 14 is unable to reach circuit The thickness and precision of plate 11, it is therefore desirable to which stricter working condition can be only achieved formula H1-H2=H0Requirement.
In the present embodiment, thickness meets below equation:H1-H2> H0.Wherein circuit board 11 is flexible circuit Plate, has certain degree of deformation, bent to be close to light guide plate 13.In present embodiment, the part of light guide plate 13 abuts against Second area 112, another part are then connected to first area 111 by light guide plate double faced adhesive tape 14, in this case circuit board 11 First area 111 can be bent towards light guide plate 13 so that light guide plate double faced adhesive tape 14 can be close to light guide plate 13 completely.If lead Tabula rasa 13 is fully connected in first area 111, can ensure that the upside of light guide plate 13 carries higher than the upside of lamp bar 12, in the vertical direction High optical coupling rate, but easily there is gap between the exiting surface of lamp bar 12 and the incidence surface of light guide plate 13, cause light leakage phenomena, drop The utilization rate of low light.Therefore light guide plate 13 is preferably arranged to part connection second area 112, another part connects the firstth area Domain 111.
Backlight module 100 further comprises glue frame 15, glue frame double faced adhesive tape 16, reflector plate 17 and shading glue 18.
Circuit board 11 also includes the 3rd region 113 of connection glue frame 15, and glue frame double faced adhesive tape 16 is arranged at the 3rd region 113 Front is to connect circuit board 11 and glue frame 15, and glue frame 15 plays a part of fixed and protected, and glue frame double faced adhesive tape 16 is according to glue frame 15 Shape set, as shown in Fig. 2 Fig. 2 is light guide plate double faced adhesive tape and glue frame double faced adhesive tape in the embodiment of backlight module one shown in Fig. 1 Schematic diagram, it is known that have the interval trough 162 between projection 161 and projection 161 in glue frame double faced adhesive tape 16, accordingly Glue frame 15 also has projection, and to further fixed lamp bar 12, the LED grain in lamp bar 12 then corresponds to interval trough 162 Setting.
The thickness H in the 3rd region 113 in present embodiment3With the thickness H of first area 1111It is identical.Reflector plate 17 is set In lamp bar 12 and the downside of light guide plate 13, for reflection light, the utilization rate of light is improved.And shading glue 18 is arranged on circuit board 11 The back side, for preventing the light that lamp bar 12 and light guide plate 13 project from being projected by the back side of circuit board 11, that is, prevent backlight module 100 there is light leakage phenomena, for convenience of the manufacture of technique, typically cover shading glue 18 to first area 111, second area 112 With the 3rd region 113, or even covering is to glue frame 15.
Referring to Fig. 3, Fig. 3 is the structural representation of the embodiment of display module one of the present invention, shown in present embodiment Module 200 includes backlight module 21 and panel 22, and backlight module 21 has identical structure with above-mentioned backlight module 100, specifically Repeat no more.Panel 22 is liquid crystal panel.
Prior art is different from, backlight module is two-sided including circuit board, lamp bar, light guide plate and light guide plate in the present invention Glue, wherein circuit board include the second area for setting the first area of lamp bar and connection light guide plate, and lamp bar is installed on circuit board The front of first area, double faced adhesive tape are arranged on the front of second area to connect circuit board and light guide plate, the front of first area Front with second area is in step-like setting, so that concordant with the upside of light guide plate on the upside of lamp bar.Light guide plate is double by light guide plate Face gemel connection on circuit boards, is fixed with lamp bar position, ensure that the higher light coupling efficient of horizontal direction;Light guide plate upside and lamp It is concordant on the upside of bar, light coupling efficient higher on vertical direction is also ensure that, i.e., there is higher coupling light between lamp bar and light guide plate Efficiency, improve the utilization rate of light.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations Technical field, it is included within the scope of the present invention.

Claims (10)

1. a kind of backlight module, the backlight module includes:Circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, wherein, The circuit board includes setting the first area of the lamp bar and connects the second area of the light guide plate;The lamp bar is installed on The front of the first area of the circuit board, the front that the light guide plate double faced adhesive tape is arranged at the second area are described to connect Circuit board and the light guide plate, it is characterised in that the front of the positive and described second area of the first area is in step-like Set so that the lamp bar be installed on circuit board side be connected to the light guide plate circuit board side it is concordant.
2. backlight module according to claim 1, it is characterised in that the thickness of the first area is more than secondth area The thickness in domain, the back side of the first area are concordant with the back side of the second area.
3. backlight module according to claim 2, it is characterised in that the thickness of the first area of the circuit board is H1, institute The thickness for stating the second area of circuit board is H2, the thickness of the light guide plate double faced adhesive tape is H0, wherein H1-H2=H0
4. backlight module according to claim 2, it is characterised in that the circuit board is flexible PCB, the circuit The thickness of the first area of plate is H1, the thickness of the second area of the circuit board is H2, the thickness of the light guide plate double faced adhesive tape is H0, wherein H1-H2> H0
5. backlight module according to claim 1, it is characterised in that the backlight module further comprises glue frame and glue frame Double faced adhesive tape, the circuit board include connecting the 3rd region of the glue frame, and the glue frame double faced adhesive tape is arranged at the 3rd region Front to connect the circuit board and the glue frame.
6. backlight module according to claim 5, it is characterised in that the thickness in the 3rd region and the first area Thickness it is identical.
7. backlight module according to claim 1, it is characterised in that the backlight module further comprises reflector plate, institute State the downside that reflector plate is arranged on the lamp bar and the light guide plate.
8. backlight module according to claim 1, it is characterised in that the backlight module further comprises shading glue, institute The back side that shading glue is arranged on the circuit board is stated, for preventing the lamp bar and the light of light guide plate injection by the electricity Project at the back side of road plate.
9. a kind of display module, it is characterised in that the display module includes:Panel;And any one of claim 1-8 institutes The backlight module stated.
10. display module according to claim 9, it is characterised in that the panel is liquid crystal panel.
CN201510852685.7A 2015-11-27 2015-11-27 A kind of backlight module and display module Active CN105301843B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510852685.7A CN105301843B (en) 2015-11-27 2015-11-27 A kind of backlight module and display module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510852685.7A CN105301843B (en) 2015-11-27 2015-11-27 A kind of backlight module and display module

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CN105301843A CN105301843A (en) 2016-02-03
CN105301843B true CN105301843B (en) 2018-03-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102937263A (en) * 2012-08-28 2013-02-20 友达光电股份有限公司 Display device and backlight module
CN203365859U (en) * 2013-05-22 2013-12-25 厦门天马微电子有限公司 Backlight module, display module and display device
CN104748020A (en) * 2015-04-27 2015-07-01 京东方科技集团股份有限公司 Backlight module, display panel and display device
CN104932141A (en) * 2015-06-09 2015-09-23 武汉华星光电技术有限公司 Backlight module and display device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9116267B2 (en) * 2012-09-28 2015-08-25 Apple Inc. Backlight structures and assemblies for electronic device displays

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102937263A (en) * 2012-08-28 2013-02-20 友达光电股份有限公司 Display device and backlight module
CN203365859U (en) * 2013-05-22 2013-12-25 厦门天马微电子有限公司 Backlight module, display module and display device
CN104748020A (en) * 2015-04-27 2015-07-01 京东方科技集团股份有限公司 Backlight module, display panel and display device
CN104932141A (en) * 2015-06-09 2015-09-23 武汉华星光电技术有限公司 Backlight module and display device

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