CN105301843A - Backlight module and display module - Google Patents

Backlight module and display module Download PDF

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Publication number
CN105301843A
CN105301843A CN201510852685.7A CN201510852685A CN105301843A CN 105301843 A CN105301843 A CN 105301843A CN 201510852685 A CN201510852685 A CN 201510852685A CN 105301843 A CN105301843 A CN 105301843A
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CN
China
Prior art keywords
guide plate
light guide
circuit board
area
backlight module
Prior art date
Application number
CN201510852685.7A
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Chinese (zh)
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CN105301843B (en
Inventor
谢晨
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武汉华星光电技术有限公司
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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 backlight module and a display module. The backlight module comprises a circuit board, a lamp bar, a light guide plate and a light guide plate double-faced adhesive tape, wherein the circuit board comprises a first region for arranging the lamp bar and a second region connected with the light guide plate; the lamp bar is mounted on the front surface of the first region of the circuit board; the double-faced adhesive tape is arranged on the front surface of the second region and is used for connecting the circuit board with the light guide plate; and the front surface of the first region and the front surface of the second region are arranged in a step shape, so that one side, mounted on the circuit board, of the lamp bar is leveled with one side, connected to the circuit board, of the light guide plate. The backlight module disclosed by the invention has relatively high light coupling efficiency.

Description

A kind of backlight module and display module
Technical field
The present invention relates to display technique field, particularly relate to a kind of backlight module and display module.
Background technology
The display device of widespread use is formed primarily of display panel and backlight module.Backlight module provides backlight for display panel, and mainly comprises lamp bar and light guide plate in backlight module, and lamp bar emits beam and enters light guide plate, and the uniform light of light guide plate outgoing is supplied to display panel.Light coupling efficient between lamp bar and light guide plate reflects the utilization factor of luminous energy, and has influence on the brightness of backlight.Nowadays increasing research is carried out towards the direction of improving light coupling efficient.
In current backlight module, due to structural restriction, cause the incidence surface of light guide plate cannot cover the exiting surface of lamp bar completely, namely some emergent ray of lamp bar does not enter light guide plate, cause the waste of luminous energy, the problem that the light coupling efficient between lamp bar and light guide plate is low.
Summary of the invention
The present invention proposes a kind of backlight module and display module, to solve the problem that in prior art, between lamp bar and light guide plate, light coupling efficient is lower.
For solving the problems of the technologies described above, the present invention proposes a kind of backlight module, and it comprises circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, and wherein circuit board comprises the first area arranging lamp bar and the second area being connected light guide plate; Lamp bar is installed on the front of the first area of circuit board, light guide plate double faced adhesive tape is arranged at the front of second area with connecting circuit board and light guide plate, the front of first area and the front of second area are step-like setting, concordant with the side that light guide plate is connected to circuit board to make lamp bar be installed on the side of circuit board.
Wherein, the thickness of first area is greater than the thickness of second area, and the back side of first area is concordant with the back side of second area.
Wherein, the thickness of the first area of circuit board is H 1, the thickness of the second area of circuit board is H 2, the thickness of light guide plate double faced adhesive tape is H 0, wherein H 1-H 2=H 0.
Wherein, circuit board is flexible PCB, and the thickness of the first area of circuit board is H 1, the thickness of the second area of circuit board is H 2, the thickness of light guide plate double faced adhesive tape is H 0, wherein H 1-H 2> H 0.
Wherein, backlight module comprises glue frame and glue frame double faced adhesive tape further, and circuit board comprises the 3rd region connecting glue frame, and glue frame double faced adhesive tape is arranged at the front in the 3rd region with connecting circuit board and glue frame.
Wherein, the thickness in the 3rd region is identical with the thickness of first area.
Wherein, backlight module comprises reflector plate further, and reflector plate is arranged on the downside of lamp bar and light guide plate.
Wherein, backlight module comprises shading glue further, and shading glue is arranged on the back side of circuit board, is penetrated by the back side of circuit board for preventing the light of lamp bar and light guide plate injection.
For solving the problems of the technologies described above, the present invention also provides a kind of display module, and this display module comprises panel, and above-mentioned backlight module.
Wherein, panel is liquid crystal panel.
The invention has the beneficial effects as follows, be different from prior art, in the present invention, backlight module comprises circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, wherein circuit board comprises the first area arranging lamp bar and the second area being connected 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 with connecting circuit board and light guide plate, and the front of first area and the front of second area are step-like setting, concordant with on the upside of light guide plate to make on the upside of lamp bar.Light guide plate is connected on circuit boards by light guide plate double faced adhesive tape, fixes, ensure that the light coupling efficient that horizontal direction is higher with lamp bar position; Concordant with on the upside of lamp bar on the upside of light guide plate, also ensure that light coupling efficient higher on vertical direction, namely between lamp bar and light guide plate, there is higher light coupling efficient, improve the utilization factor of light.
Accompanying drawing explanation
Fig. 1 is the structural representation of backlight module one embodiment 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 that the present invention shows module one embodiment.
Embodiment
Consult Fig. 1, Fig. 1 is the structural representation of backlight module one embodiment of the present invention, and in present embodiment, backlight module 100 comprises 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, and be mainly used in providing light source, wherein circuit board 11 is not used to provide light source, but for carrying lamp bar 12 and light guide plate 13, itself function is then carry out signal control to display module.
In present embodiment, lamp bar 12 is LED light source, is made up of multiple LED grain, and injection light enters light guide plate 13, then provides uniform light by light guide plate 13.In the process, the ratio entered between light that the light of light guide plate 13 and lamp bar 12 penetrate is then the optically-coupled rate between lamp bar 12 and light guide plate 13, optically-coupled rate has reacted the utilization factor of light, and in design of backlight module field, improve light utilization efficiency is the target that it improves always.Backlight module 100 is the design by configuration aspects, makes light guide plate 13 can the light that sends of receiving light bar 12 as much as possible, improves the optically-coupled rate between lamp bar 12 and light guide plate 13, to improve light utilization efficiency.
Specifically, circuit board 11 comprises the first area 111 being provided with lamp bar 12, with the second area 112 being connected light guide plate 13.Lamp bar 12 is welded on the front of first area 111, and light guide plate 13 is connected to light guide plate 11 by the light guide plate double faced adhesive tape 14 being arranged on second area 112 front.The front of circuit board 11 first area 111 and the front of second area 112 are step-like setting, make lamp bar 12 be installed on the side (on the upside of lamp bar 12) of circuit board 11 concordant with the side (on the upside of light guide plate 13) that light guide plate 13 is connected to circuit board 11.
Wherein, the front being close to first area 111 on the upside of lamp bar 12, can be regarded as, and on the upside of light guide plate 13 with the front of second area 112 across light guide plate double faced adhesive tape 14.If the front of first area 111 is concordant with the front of second area 112, then the light that on lamp bar 12, the part of light guide plate double faced adhesive tape 14 thickness sends cannot enter into light guide plate 13, and in the vertical direction optically-coupled rate is low.Therefore in the present embodiment, the front of first area 111 and the front of second area 112 are step-like setting, light guide plate double faced adhesive tape 14 arranges the front of second area 112, namely step place is arranged on, when light guide plate 13 is connected on circuit board 11 by light guide plate double faced adhesive tape 14, can be concordant with on the upside of lamp bar 12 on the upside of it, improve the optically-coupled rate on vertical direction.
As circuit board 11, in general, its first area 111 is concordant with the back side of second area 112, and the front of the front of first area 111 and second area 112 is step-like setting, the thickness H of corresponding first area 111 1be greater than the thickness H of second area 112 2.Optimally, if the thickness of light guide plate double faced adhesive tape 14 is H 0, then the thickness relationship in circuit board 11 meets following formula H 1-H 2=H 0.In this case no matter light guide plate 13 is parts is connected to second area 112, is still connected to second area 112 completely and all can ensures on the upside of it concordant with on the upside of lamp bar 12.But in this case, because light guide plate double faced adhesive tape 14 material 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 cannot reach the thickness and precision of circuit board 11, therefore needs stricter working condition just can reach formula H 1-H 2=H 0requirement.
In the present embodiment, thickness meets following formula: H 1-H 2> H 0.Wherein circuit board 11 is flexible PCB, has certain degree of deformation, bent to be close to light guide plate 13.As in present embodiment, light guide plate 13 part abuts against second area 112, another part is then connected to first area 111 by light guide plate double faced adhesive tape 14, in this case the first area 111 of circuit board 11 can bend towards light guide plate 13, makes light guide plate double faced adhesive tape 14 can be close to light guide plate 13 completely.If light guide plate 13 is connected to first area 111 completely, can ensure that in the vertical direction improves optically-coupled rate higher than on the upside of lamp bar 12 on the upside of light guide plate 13, but easily occur gap between lamp bar 12 exiting surface and light guide plate 13 incidence surface, cause light leakage phenomena, reduce the utilization factor of light.Therefore the preferred part that light guide plate 13 is set to connects second area 112, and another part connects first area 111.
Backlight module 100 comprises glue frame 15, glue frame double faced adhesive tape 16, reflector plate 17 and shading glue 18 further.
Circuit board 11 also comprises the 3rd region 113 connecting glue frame 15, glue frame double faced adhesive tape 16 is arranged at the front in the 3rd region 113 with connecting circuit board 11 and glue frame 15, glue frame 15 plays effect that is fixing and protection, glue frame double faced adhesive tape 16 is arranged according to the shape of glue frame 15, as shown in Figure 2, 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, the interval trough 162 between projection 161 and projection 161 is had in known glue frame double faced adhesive tape 16, corresponding glue frame 15 also has projection, in order to further fixed light bar 12, LED grain in lamp bar 12 then corresponds to the setting of interval trough 162.
The thickness H in the 3rd region 113 in present embodiment 3with the thickness H of first area 111 1identical.Reflector plate 17 is arranged on the downside of lamp bar 12 and light guide plate 13, for reflection ray, improves the utilization factor of light.And shading glue 18 is arranged on the back side of circuit board 11, light for preventing lamp bar 12 and light guide plate 13 from penetrating is penetrated by the back side of circuit board 11, namely prevent backlight module 100 from occurring light leakage phenomena, for convenience of the manufacture of technique, generally shading glue 18 is covered to first area 111, second area 112 and the 3rd region 113, is even covered to glue frame 15.
Refer to Fig. 3, Fig. 3 is the structural representation that the present invention shows module one embodiment, and show module 200 in present embodiment and comprise backlight module 21 and panel 22, backlight module 21 has identical structure with above-mentioned backlight module 100, specifically repeats no more.Panel 22 is liquid crystal panel.
Be different from prior art, in the present invention, backlight module comprises circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, wherein circuit board comprises the first area arranging lamp bar and the second area being connected 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 with connecting circuit board and light guide plate, the front of first area and the front of second area are step-like setting, concordant with on the upside of light guide plate to make on the upside of lamp bar.Light guide plate is connected on circuit boards by light guide plate double faced adhesive tape, fixes, ensure that the light coupling efficient that horizontal direction is higher with lamp bar position; Concordant with on the upside of lamp bar on the upside of light guide plate, also ensure that light coupling efficient higher on vertical direction, namely between lamp bar and light guide plate, there is higher light coupling efficient, improve the utilization factor of light.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (10)

1. a backlight module, is characterized in that, described backlight module comprises: circuit board, lamp bar, light guide plate and light guide plate double faced adhesive tape, and wherein, described circuit board comprises the first area arranging described lamp bar and the second area being connected described light guide plate; Described lamp bar is installed on the front of the first area of described circuit board, described light guide plate double faced adhesive tape is arranged at the front of described second area to connect described circuit board and described light guide plate, the front of described first area and the front of described second area are step-like setting, concordant with the side that described light guide plate is connected to circuit board to make described lamp bar be installed on the side of circuit board.
2. backlight module according to claim 1, is characterized in that, the thickness of described first area is greater than the thickness of described second area, and the back side of described first area is concordant with the back side of described second area.
3. backlight module according to claim 2, is characterized in that, the thickness of the first area of described circuit board is H 1, the thickness of the second area of described circuit board is H 2, the thickness of described light guide plate double faced adhesive tape is H 0, wherein H 1-H 2=H 0.
4. backlight module according to claim 2, is characterized in that, described circuit board is flexible PCB, and the thickness of the first area of described circuit board is H 1, the thickness of the second area of described circuit board is H 2, the thickness of described light guide plate double faced adhesive tape is H 0, wherein H 1-H 2> H 0.
5. backlight module according to claim 1, it is characterized in that, described backlight module comprises glue frame and glue frame double faced adhesive tape further, described circuit board comprises the 3rd region connecting described glue frame, and described glue frame double faced adhesive tape is arranged at the front in described 3rd region to connect described circuit board and described glue frame.
6. backlight module according to claim 5, is characterized in that, the thickness in described 3rd region is identical with the thickness of described first area.
7. backlight module according to claim 1, is characterized in that, described backlight module comprises reflector plate further, and described reflector plate is arranged on the downside of described lamp bar and described light guide plate.
8. backlight module according to claim 1, it is characterized in that, described backlight module comprises shading glue further, and described shading glue is arranged on the back side of described circuit board, is penetrated by the back side of described circuit board for preventing the light of described lamp bar and the injection of described light guide plate.
9. show a module, it is characterized in that, described display module comprises: panel; And the backlight module according to any one of claim 1-8.
10. show module according to claim 9, it is characterized in that, described panel is liquid crystal panel.
CN201510852685.7A 2015-11-27 2015-11-27 A kind of backlight module and display module Active CN105301843B (en)

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

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Citations (5)

* 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
US20140092630A1 (en) * 2012-09-28 2014-04-03 Apple Inc. Backlight Structures and Assemblies for Electronic Device Displays
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

Patent Citations (5)

* 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
US20140092630A1 (en) * 2012-09-28 2014-04-03 Apple Inc. Backlight Structures and Assemblies for Electronic Device Displays
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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