CN203365859U - Backlight module, display module and display device - Google Patents

Backlight module, display module and display device Download PDF

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Publication number
CN203365859U
CN203365859U CN 201320283902 CN201320283902U CN203365859U CN 203365859 U CN203365859 U CN 203365859U CN 201320283902 CN201320283902 CN 201320283902 CN 201320283902 U CN201320283902 U CN 201320283902U CN 203365859 U CN203365859 U CN 203365859U
Authority
CN
China
Prior art keywords
light guide
guide plate
led
backlight module
module
Prior art date
Application number
CN 201320283902
Other languages
Chinese (zh)
Inventor
胡永学
Original Assignee
厦门天马微电子有限公司
天马微电子股份有限公司
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Publication date
Application filed by 厦门天马微电子有限公司, 天马微电子股份有限公司 filed Critical 厦门天马微电子有限公司
Priority to CN 201320283902 priority Critical patent/CN203365859U/en
Application granted granted Critical
Publication of CN203365859U publication Critical patent/CN203365859U/en

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Abstract

The utility model discloses a backlight module used for improving the alignment method of an LED and a light guide board, a display module comprising the backlight module and a display device. The backlight module comprises the light guide board, double-faced adhesive tape arranged on the light guide board, a flexible circuit board arranged on the double-faced adhesive tape and connected with the light guide board through the double-faced adhesive tape, the LED fixed to the flexible circuit board and located at the side edge of the light guide board and a reflective sheet arranged on the side, opposite to the double-faced adhesive tape, of the light guide board, wherein a light emitting port of the LED faces the side edge of the light guide board and the side, opposite to the flexible circuit board, of the LED is not provided with a reflective sheet.

Description

A kind of backlight module, demonstration module and display device
Technical field
The utility model relates to the backlight module field, relates in particular to the conforming back light module unit structure of contraposition of a kind of LED of improvement and light guide plate, and the demonstration module and the display device that comprise this backlight module.
Background technology
Display device mainly is comprised of spare parts such as panel, backlight module, drive IC, control circuits.With liquid crystal indicator (Liquid Crystal Display, LCD) be example, because liquid crystal panel itself is not had a characteristics of luminescence, must reach with backlight module the function of demonstration, the manufacture process of LCD panel is generally: after face glass produces, must be first in conjunction with colored filter, both pour into liquid crystal and make liquid crystal panel after the involution, then are combined into the LCD module with assemblies such as backlight module, drive IC, control circuit boards.One of key part and component that backlight module is panel of LCD, function is well-off brightness and the light source be evenly distributed, and makes normally show image of LCD.Therefore, backlight module generally consists of framework and the optical element be assembled on framework.Wherein optical element comprises light guide plate.Light guide plate generally is comprised of substrate and site, in corresponding LED bright dipping side, broached-tooth design is arranged, thereby the light that side-emitting LED is sent converts the area source of design direction to.
Currently available technology as depicted in figs. 1 and 2, metal backing 16 surrounding inboards are provided with glue frame 17, lay one deck reflector plate 15 for whole on backboard 16, then on reflector plate, place LED11 and light guide plate 14, the lower surface of LED11 and light guide plate 14 is on same level.LED11 is fixed on flexible PCB 12, and is placed on a side of light guide plate 14.Flexible PCB 12 is connected with light guide plate 14 with glue frame 17 by double sticky tape 13.Because the height of LED11 and the variable thickness of light guide plate 14 cause, generally the height of LED11 is greater than the thickness of light guide plate 14, and the luminescent center of LED is positioned at the geometric center M1(geometric center of himself short transverse and equates to the upper side edge of this LED and the distance of lower side).Now, the central plane M2 of light guide plate 14 and LED11 go out light center M1 with regard to not on same level, and the light angle that upside enters light guide plate 14 diminishes, thereby causes luminous energy to have greater loss.
The utility model content
Problem to be solved in the utility model is: in the backlight module of prior art, the bright dipping center of the central plane of light guide plate and LED differs greatly, and there is greater loss in luminous energy.
The utility model provides a kind of backlight module, comprising: light guide plate; Double sticky tape, be arranged on described light guide plate; Flexible PCB, be arranged on described double sticky tape, with described light guide plate, by described double sticky tape, is connected; LED, be fixed in described flexible PCB, and be positioned at the side of described light guide plate, and the light-emitting window of described LED lamp is over against the side of described light guide plate, and light direction is parallel to the plane of described LED flexible PCB; Reflector plate, be arranged on a described light guide plate side of described double sticky tape dorsad, and LED dorsad a side of flexible PCB reflector plate is not set.
Further, the height of setting described LED lamp is H1, and the thickness of described light guide plate is H2, and the thickness of described double sticky tape is H3, meets following relational expression: H1=H2+2H3.
Further, the thickness of setting reflector plate is H4, meets: H1≤H2+H3+H4.The height that is LED is less than double sticky tape, light guide plate, reflector plate three's thickness sum or equates with three's thickness sum.
Further, the distance of the luminescent center of described LED and described flexible PCB is half of described LED height.
The backlight module that the utility model provides also comprises the optical diaphragm group on light guide plate, and optical diaphragm group comprises the diffusion sheet be arranged on described light guide plate, lower bright enhancement film and upper bright enhancement film successively.
The utility model also provides a kind of demonstration module of applying described backlight module, comprises panel and above-mentioned backlight module, and described panel is liquid crystal panel.
The utility model also provides a kind of display device of applying above-mentioned demonstration module simultaneously.
Compared with prior art, the back light module unit structure that the utility model provides, light guide plate by a two-sided adhesive tape sticking to the flexible PCB that carries LED, by dismissing the LED reflector plate of flexible PCB one side dorsad, reduce the central plane of light guide plate and the bright dipping center difference of LED, reduced optical energy loss.
The accompanying drawing explanation
Included accompanying drawing, for providing further understanding of the present utility model, is merged in and forms the application's a part, shows embodiment of the present utility model, and is used from and explains principle of the present utility model with instructions one.In the accompanying drawings:
The structural representation of the backlight module that Fig. 1 is prior art;
Fig. 2 is that LED goes out rising angle schematic diagram in the situation of light center and light guide plate ragged center;
The structural representation of the backlight module that Fig. 3 is the utility model embodiment mono-proposition;
The structural representation of the backlight module that Fig. 4 is the utility model embodiment bis-propositions;
Fig. 5 is that LED goes out rising angle schematic diagram in light center and the Centered situation of light guide plate.
Embodiment
Core concept of the present utility model is, a kind of back light module unit structure is provided, light guide plate by a two-sided adhesive tape sticking to the flexible PCB that carries LED, by dismissing the LED reflector plate of flexible PCB one side dorsad, reduce the central plane of light guide plate and the bright dipping center difference of LED, reduced optical energy loss.
For the purpose of this utility model, feature are become apparent, below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
Embodiment mono-
The present embodiment provides a kind of back light module unit structure, with reference to figure 3, comprising: backboard 26, glue frame 27, be arranged at reflector plate 25, light guide plate 24, flexible PCB 22 on backboard, be fixed in LED21, double sticky tape 23, optical diaphragm group 28 on flexible PCB.Wherein reflector plate 25, light guide plate 24, double sticky tape 23 and together with flexible PCB 22 fits tightly.LED21 is positioned at the side edge of light guide plate 24, and the light-emitting window of LED21 is over against the side of light guide plate 24.The framework of this kind of backlight module is the structure that metal backing 26 separates with glue frame 27.Optical diaphragm group 28 comprises diffusion sheet 281, lower bright enhancement film 282 and upper bright enhancement film 283.Optical diaphragm group 28 is fixed on glue frame 27 by shading rubber belt 29.
Continuation is with reference to figure 3, be provided with glue frame 27 in the inboard surrounding of backboard 26, glue frame 27 1 sides are provided with the groove of placing LED21, and LED21 is fixed on a side of toward back plate 26 above flexible PCB 22, and flexible PCB 22 is connected with light guide plate 24 with glue frame 27 by double sticky tape 23.Be provided with reflector plate 25 between backboard 26 and light guide plate 24, reflector plate 25 extends to glue frame 27 belows (and between backboard 26), but there is no reflector plate 25 between LED21 and backboard 26.
The height of setting LED21 is H1, and the thickness of light guide plate 24 is H2, and the thickness of double sticky tape 23 is H3, and the thickness of reflector plate 25 is H4, can, by adjusting the thickness of double sticky tape 23 or light guide plate 24, meet following relation: H1=H2+2H3, H1≤H2+H3+H4.
Below illustrate the embodiment of the present embodiment.Set H1=0.6mm, H2=0.5mm.The difference in height of LED21 and light guide plate 24 is 0.1mm.Now the thickness of double sticky tape 23 is exactly H3=0.05mm, and just on average in light guide plate, Shang Xia 24 both sides rather than only concentrate on above light guide plate 24 to the difference in height of light guide plate 24 for LED21 like this.Divide 3 kinds of situation discussion:
1, the thickness of supposing reflector plate 25 is H4=0.065mm, i.e. H4>H3, and the LED21 below does not have reflector plate 25, LED21 is 0.015mm apart from the height of backboard 26.Now meet H1<H2+H3+H4.
If the thickness of 2 reflector plates 25 is H4=0.05mm, i.e. H4=H3, now H1=H2+H3+H4 just.LED21 and backboard 26 fit tightly.
If the thickness of 3 reflector plates 25 not enough 0.05mm, i.e. H4<H3, the now insufficient space between LED21 and backboard 26, i.e. H1>H2+H3+H4.Now can change light guide plate 24, the thickness of light guide plate 24 is increased, make and meet H1≤H2+H3+H4, can improve the light extraction efficiency of light guide plate 24 simultaneously.
Work as H1=0.6mm, during H2=0.4mm, the difference in height of LED21 and light guide plate 24 is 0.2mm, and now the thickness of double sticky tape 23 is exactly H3=0.1mm.By that analogy, realize the consistance contraposition of exiting surface center N1 and the light guide plate 24 center N2 of LED21 by the thickness of adjusting double sticky tape 23, as shown in Figure 5.
Embodiment bis-
The present embodiment provides a kind of back light module unit structure, with reference to figure 4, comprising: integrated framework (backboard 26 and glue frame 27 are formed in one structure), be arranged at reflector plate 25, light guide plate 24, flexible PCB 22 on backboard 26, be fixed in LED21, double sticky tape 23, optical diaphragm group 28 on flexible PCB.Wherein reflector plate 25, light guide plate 24, double sticky tape 23 and together with flexible PCB 22 fits tightly.LED21 is positioned at the side of light guide plate 24, and the light-emitting window of LED21 is over against the side of light guide plate 24.The framework of this kind of backlight module structure that is formed in one, first complete the making of metal backing 26, then metal backing 26 put into to the mould of moulding glue frame 27, by glue frame 27 with together with backboard 26 is injection-moulded in.Optical diaphragm group 28 comprises diffusion sheet 281, lower bright enhancement film 282 and upper bright enhancement film 283.Optical diaphragm group 28 is fixed on glue frame 27 by shading rubber belt 29.
Continuation is with reference to figure 4, be provided with glue frame 27 in the inboard surrounding of backboard 26, backboard 26 and glue frame 27 structure that is formed in one, glue frame 27 1 sides are provided with the groove of placing LED21, LED21 is fixed on a side of toward back plate 26 above flexible PCB 22, and flexible PCB 22 is connected with light guide plate 24 with glue frame 27 by double sticky tape 23.Be provided with reflector plate 25 between backboard 26 and light guide plate 24, reflector plate 25 is concordant with light guide plate 24 in the side near LED21.A LED21 side of flexible PCB 22 does not dorsad arrange reflector plate 25.
The height of setting LED21 is H1, and the thickness of light guide plate 24 is H2, and the thickness of double sticky tape 23 is H3, and the thickness of reflector plate 25 is H4, can, by adjusting the thickness of double sticky tape 23 or light guide plate 24, meet following relation: H1=H2+2H3, H1≤H2+H3+H4.
Below illustrate the embodiment of the present embodiment.Set H1=0.6mm, H2=0.5mm.The difference in height of LED21 and light guide plate 24 is 0.1mm.Now the thickness of double sticky tape 23 is exactly H3=0.05mm, and just on average in light guide plate, Shang Xia 24 both sides rather than only concentrate on above light guide plate 24 to the difference in height of light guide plate 24 for LED21 like this.Divide 3 kinds of situation discussion:
1, the thickness of supposing reflector plate 25 is H4=0.065mm, i.e. H4>H3, and the LED21 below does not have reflector plate 25, LED21 is 0.015mm apart from the height of backboard 26.Now meet H1<H2+H3+H4.
If the thickness of 2 reflector plates 25 is H4=0.05mm, i.e. H4=H3, now H1=H2+H3+H4 just.LED21 and backboard 26 fit tightly.
If the thickness of 3 reflector plates 25 not enough 0.05mm, i.e. H4<H3, now insufficient space, i.e. H1>H2+H3+H4 between LED21 and backboard 26.Now can change light guide plate 24, the thickness of light guide plate 24 is increased, make and meet H1≤H2+H3+H4, can improve the light extraction efficiency of light guide plate 24 simultaneously.
Work as H1=0.6mm, during H2=0.4mm, the difference in height of LED21 and light guide plate 24 is 0.2mm, and now the thickness of double sticky tape 23 is exactly H3=0.1mm.By that analogy, realize the consistance contraposition of exiting surface center N1 and the light guide plate 24 center N2 of LED21 by the thickness of adjusting double sticky tape 23, as shown in Figure 5.
The utility model also provides a kind of demonstration module of applying described backlight module, comprises panel and above-mentioned backlight module, and described panel is liquid crystal panel.
The utility model also provides a kind of display device of applying above-mentioned demonstration module simultaneously.
Compared with prior art, the back light module unit structure that the utility model provides, by dismissing the LED reflector plate of flexible PCB one side dorsad, reduce the central plane of light guide plate and the bright dipping center difference of LED, reduced optical energy loss.
Although the utility model discloses as above with preferred embodiment; so it is not in order to limit the utility model; have and usually know the knowledgeable in technical field under any; within not breaking away from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is as the criterion when looking claims person of defining.

Claims (9)

1. a backlight module comprises:
Light guide plate;
Double sticky tape, be arranged on described light guide plate;
Flexible PCB, be arranged on described double sticky tape, with described light guide plate, by described double sticky tape, is connected;
LED, be fixed in described flexible PCB, and be positioned at the side of described light guide plate, and the light-emitting window of described LED is over against the side of described light guide plate;
Reflector plate, be arranged on a described light guide plate side of described double sticky tape dorsad, and described LED dorsad a side of described flexible PCB described reflector plate is not set.
2. backlight module as claimed in claim 1, is characterized in that, the height of setting described LED is H1, and the thickness of described light guide plate is H2, and the thickness of adjusting described double sticky tape is H3, to meet following relational expression: H1=H2+2H3.
3. backlight module as claimed in claim 2, is characterized in that, the thickness of setting described reflector plate is H4, meets: H1≤H2+H3+H4.
4. backlight module as claimed in claim 1, is characterized in that, the distance of the luminescent center of described LED and described flexible PCB is half of described LED height.
5. backlight module as claimed in claim 1, is characterized in that, also comprises the optical diaphragm group be arranged on described light guide plate.
6. backlight module as claimed in claim 5, is characterized in that, described optical diaphragm group comprises the diffusion sheet be arranged on described light guide plate, lower bright enhancement film and upper bright enhancement film successively.
7. one kind shows module, comprising:
Panel;
The described backlight module of claim 1-6 any one.
8. demonstration module as claimed in claim 7, is characterized in that, described panel is liquid crystal panel.
9. a display device, comprise demonstration module claimed in claim 7.
CN 201320283902 2013-05-22 2013-05-22 Backlight module, display module and display device CN203365859U (en)

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Application Number Priority Date Filing Date Title
CN 201320283902 CN203365859U (en) 2013-05-22 2013-05-22 Backlight module, display module and display device

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
CN203365859U true CN203365859U (en) 2013-12-25

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105301843A (en) * 2015-11-27 2016-02-03 武汉华星光电技术有限公司 Backlight module and display module
CN105570756A (en) * 2014-10-10 2016-05-11 纬创资通股份有限公司 Backlight module
CN105700229A (en) * 2014-12-10 2016-06-22 乐金显示有限公司 Backlight unit and liquid crystal display device including the same
TWI547742B (en) * 2015-06-01 2016-09-01 揚昇照明股份有限公司 Backlight module
CN106970485A (en) * 2017-02-28 2017-07-21 惠州Tcl移动通信有限公司 A kind of display device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9891366B2 (en) 2014-10-10 2018-02-13 Winstron Corp. Backlight module
CN105570756A (en) * 2014-10-10 2016-05-11 纬创资通股份有限公司 Backlight module
CN105570756B (en) * 2014-10-10 2017-11-14 纬创资通股份有限公司 Backlight module
CN105700229A (en) * 2014-12-10 2016-06-22 乐金显示有限公司 Backlight unit and liquid crystal display device including the same
CN105700229B (en) * 2014-12-10 2019-03-26 乐金显示有限公司 Back light unit and liquid crystal display device including the back light unit
TWI547742B (en) * 2015-06-01 2016-09-01 揚昇照明股份有限公司 Backlight module
CN105301843A (en) * 2015-11-27 2016-02-03 武汉华星光电技术有限公司 Backlight module and display module
CN105301843B (en) * 2015-11-27 2018-03-13 武汉华星光电技术有限公司 A kind of backlight module and display module
CN106970485A (en) * 2017-02-28 2017-07-21 惠州Tcl移动通信有限公司 A kind of display device

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