CN104676379B - Backlight module and the liquid crystal display device comprising it - Google Patents
Backlight module and the liquid crystal display device comprising it Download PDFInfo
- Publication number
- CN104676379B CN104676379B CN201510092105.9A CN201510092105A CN104676379B CN 104676379 B CN104676379 B CN 104676379B CN 201510092105 A CN201510092105 A CN 201510092105A CN 104676379 B CN104676379 B CN 104676379B
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- China
- Prior art keywords
- diaphragm
- reflector plate
- transflective
- backlight module
- bottom reflector
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
Abstract
A kind of liquid crystal display device the present invention relates to backlight module and comprising it.The backlight module includes horizontally disposed bottom reflector plate, side reflector plate, the light source being fixedly installed in reflection cavity of the frame for being arranged on bottom reflector plate edge, the reflection cavity hollow with bottom reflector plate composition being fixedly installed on frame, and it is arranged on the Transflective diaphragm at the opening of reflection cavity, wherein, Transflective diaphragm is overlapped on light source and side reflector plate.The backlight module overall weight is light and low production cost.
Description
Technical field
The present invention relates to field of liquid crystal display, the liquid crystal display device more particularly, to a kind of backlight module and comprising it.
Background technology
In traditional liquid crystal display device, because liquid crystal panel does not light, it is necessary to by additional light source ability in itself
Shown.And generally such backlight module has two kinds of backlight and reflective light source, because backlight type light source need not receive ring
Border influences, so the light source in current liquid crystal display device is nearly all backlight type light source.
And present backlight module, can be divided into side entering type and straight-down negative two ways substantially.Side entering type has power consumption
It is small, the advantages of thickness of thin.But because side entering type needs to use light guide plate.So that the weight of side entrance back module is larger,
For especially for larger backlight Source size, the overall weight of backlight module is increased.Meanwhile, it is this with light guide plate
Backlight module it is relatively costly.
Thus, it is desirable to a kind of can realize that lightweight can make the backlight module of cost reduction again.
The content of the invention
For the above-mentioned technical problem in the presence of prior art, the present invention proposes a kind of backlight module and comprising it
Liquid crystal display device.The backlight module has lightweight, the advantage of low cost.
According to the first aspect of the invention, it is proposed that a kind of backlight module, including：
Horizontally disposed bottom reflector plate,
The frame at bottom reflector plate edge is arranged on,
The side reflector plate on frame is fixedly installed on, side reflector plate constitutes hollow reflection cavity with bottom reflector plate,
The light source in reflection cavity is fixedly installed on, and
The Transflective diaphragm at the opening of reflection cavity is arranged on, wherein, Transflective diaphragm is overlapped on light source and side reflector plate
On.
In backlight module of the invention, the light that light source sends is derived by Transflective diaphragm, or by bottom reflector plate
Derived by Transflective diaphragm with after side reflector plate reflection.Because backlight module of the invention need not set light guide plate, so that
Alleviate the overall weight and production cost of backlight module.
In one embodiment, the one side relative with bottom reflector plate of Transflective diaphragm is incidence surface, Transflective diaphragm
The another side opposite with bottom reflector plate is local reflex local transmission face.By this set, the light sent when light source via
When incidence surface enters Transflective diaphragm, the light of a part is appeared from local reflex local transmission face, and another part light is anti-
It is mapped in bottom reflector plate or side reflector plate, to continue to propagate, is appeared until from Transflective diaphragm.
In one embodiment, it is provided for changing the projection of opticpath on the incidence surface of Transflective diaphragm.It is preferred that
Ground, projection is configured to one or more in uniform circular cone on Transflective diaphragm, pyramid or terrace with edge, the section of its protrusions
Area is tapered into in reflection cavity from Transflective diaphragm on the direction of extension.Can be changed at incidence surface by this set
Become the propagation path of light so that light is promptly projected in approximate collimated light mode to Transflective diaphragm, to overcome liquid crystal surface
The inclined problem of the big visual characters of plate.
In one embodiment, Transflective diaphragm has printing opacity diaphragm local with the local reflex for being arranged on printing opacity diaphragm thoroughly
The reflecting element penetrated on face, wherein, reflecting element is distributed on printing opacity diaphragm in matrix form.Going out for light source can be caused by this set
Light is reached than more uniform state.Meanwhile, the reflecting element preparation process of matrix form distribution is simple, simplifies technique productions.
In one embodiment, printing opacity diaphragm is by makrolon, poly terephthalic acid class plastics, polymethyl methacrylate
Or the one kind in clear glass is made,
And/or reflecting element is made up of the one kind in white ink, reflective ink, silver or aluminium.Simplified by this set
Technique, reduces manufacturing cost.
In one embodiment, it is provided for supporting the transparent support member of Transflective diaphragm in reflection cavity.The support
Part is connected to the incident side of Transflective diaphragm, to support Transflective diaphragm, prevents Transflective diaphragm to be turned under under self gravitation
It is bent and deform.Thus, it is thinner by set that support member can do Transflective diaphragm, to reduce material cost, and be conducive to
Reduce the size of backlight module.
In one embodiment, support member is contacted with the non-reflective part region of Transflective diaphragm,
And/or support member is not more than 30 square millimeters with the contact area of Transflective diaphragm.To be supported by this set
Part falls below minimum to the influence degree that light is propagated.
In one embodiment, support configuration be by Transflective diaphragm on earth reflector plate direction upper section area by
It is cumulative big round table-like,
And/or in reflection cavity from centre to peripheral direction on, support member distribution density reduce.Round table-like support member machine
Tool is functional, and compact with the contact of bottom reflector plate and Transflective diaphragm, is favorably improved the stabilization of support Transflective diaphragm
Property.By setting the distribution density of support member, the structure and manufacturing cost of backlight module are optimized, further increase Transflective
The stability of diaphragm.
According to the second aspect of the invention, there is provided a kind of liquid crystal display device, it includes above-mentioned backlight module.The liquid crystal
Display device also have it is lightweight, the characteristics of low cost.
Compared with prior art, it is an advantage of the current invention that backlight module need not set light guide plate, its entirety is alleviated
Weight.The backlight module process is simple, low production cost.
Brief description of the drawings
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing.In figure：
Fig. 1 shows the structure chart of backlight module of the invention.
Fig. 2 shows the structural representation of liquid crystal display device of the invention.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not drawn according to actual ratio.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 shows backlight module of the invention 10.As shown in figure 1, backlight module 10 includes bottom reflector plate 4, side
Frame 2, light source 3, side reflector plate 5 and Transflective diaphragm 1.Wherein, bottom reflector plate 4 is in horizontally disposed.Frame 2 is arranged on bottom reflector plate
4 edge.Side reflector plate 5 is arranged on frame 2, and forms hollow reflection cavity 6 with bottom reflector plate 4.And light source 3 is fixedly installed
On the wall of reflection cavity 6.Transflective diaphragm 1 is arranged at the opening of reflection cavity 6, and is overlapped on light source 3 and side reflector plate 5.
In backlight module of the invention 10, it is not necessary to which light guide plate is set, the backlight of light guide plate is provided with so as to avoid
The weight weight of module, the problem of high cost.In the backlight module 10, the light that light source 3 sends is derived by Transflective diaphragm 1, or
Person derives by after bottom reflector plate 4 and side reflector plate 5 by Transflective diaphragm 1.So that light utilization is high, so as to improve therewith
The display quality of the liquid crystal display device of matching.In addition, Transflective diaphragm 1 is overlapped on light source 3 and side reflector plate 5, contribute to drop
The low size of backlight module 10.
According to the present invention, the one side relative with bottom reflector plate 4 of Transflective diaphragm 1 is incidence surface.And Transflective diaphragm 1
The another side opposite with bottom reflector plate 4 is local reflex local transmission face.Thus, the light for sending when light source 3 is via incidence surface
During into Transflective diaphragm 1, the light of a part is appeared from Transflective diaphragm 1, and another part light is reflected to bottom reflector plate 4
Or in side reflector plate 5, to continue to propagate, appeared until from Transflective diaphragm 1.The straight line with arrow illustrates the biography of light in figure
Broadcast direction and path.Thus, the Transflective diaphragm 1 of this structure makes light with the angle of approximate line of collimation from Transflective diaphragm 1
It is upper outwards to project, it is ensured that the uniformity of light.
In one embodiment, set raised in the one side (incidence surface) relative with bottom reflector plate 4 of Transflective diaphragm 1
13, for changing the path of light.Preferably, projection 13 can be configured to coniform.And raised 13 area of section by
Transflective diaphragm 1 is tapered into in reflection cavity 6 on the direction of extension.But of the invention raised 13 are not limited to this structure
Form, can also be other structures form.Such as in pyramid, terrace with edge one or more.It is then this to change opticpath
Bulge-structure all should fall into protection scope of the present invention.
Preferably, in order to simplify manufacturing process, on Transflective diaphragm 1, raised 13 is to be uniformly distributed.So as to light source 3
Light is reflected when Transflective diaphragm 1 is entered at raised 13, changes the propagation path of light so that light is rapider
The approximate collimated light mode in ground is projected from Transflective diaphragm 1.Thus, to improve the big visual characters of liquid crystal panel by this set inclined
Problem.Meanwhile, improve light utilization, the luminance loss of the light of reduction.
According to the present invention, Transflective diaphragm 1 has printing opacity diaphragm 12 and reflecting element 11.Wherein, reflecting element 11 is arranged on
In the one side opposite with bottom reflector plate 4 of light diaphragm 12.Preferably, reflecting element 11 is distributed on printing opacity diaphragm 12 in matrix form.
So as to the light of light source 3 is by that after the Transflective diaphragm 1 of this set, can reach than more uniform state.Meanwhile, matrix form
The reflecting element 11 of distribution causes that preparation process is simple, simplifies technique productions.
Specifically, Transflective diaphragm 1 with light transmittance printing opacity diaphragm 12 high as substrate.It is, printing opacity diaphragm 12 can be by
One kind in makrolon, poly terephthalic acid class plastics, polymethyl methacrylate or clear glass is fabricated by.And saturating
Reflecting element 11 is partially provided with light diaphragm 12.And there is gap 14, this gap 14 is transmitted for light between reflecting element 11.
And reflecting element 11 can be made up of the one kind in white ink, reflective ink, silver or aluminium.
Reflecting element 11 can be 2D patterns or 3D patterns.The reflecting element 11 of 2D patterns can have any shape, for example, side
Shape, circle, polygon or quincunx etc..Also, the reflecting element 11 of 2D patterns can be printed onto by the way of printing
On the surface of light diaphragm 12.The reflecting element 11 of 3D patterns can be bulge-structure, such as square projection, the projection of cylindrical type or rib
Projection of bench-type etc..In the fabrication process, will be coated on the surface of printing opacity diaphragm 12 with highly reflective material, and using quarter
The mode of erosion or the mode of machining make.
Transparent support member 8 is set in reflection cavity 6.One end of the support member 8 is connected to the incidence surface of Transflective diaphragm 1
On, the other end is connected on bottom reflector plate 4, to support Transflective diaphragm 1, prevents Transflective diaphragm 1 downward under self gravitation
Bend and deform.Thus, it is thinner by set that support member 8 can do Transflective diaphragm 1, to reduce material cost, and have
Beneficial to the size of reduction backlight module 10.
Support member 8 is contacted with the non-reflective part region of Transflective diaphragm 1, that is, one end of support member 8 is connected to gap
In 14 regional extent.Also, support member 8 be configured to it is round table-like, and in the direction by the reflector plate 4 on earth of Transflective diaphragm 1
On, the area of section of support member 8 gradually increases.The stability of support is ensure that by this supporting way.Support member 8 and transflection
The contact area of formula diaphragm 1 is not more than 30 square millimeters.For example, contact area can be 20 square millimeters.Meanwhile, in reflection cavity
In 6, from centre to peripheral direction on, the distribution density of support member 8 is gradually reduced.The support member 8 that this mode is set both ensured
The stability of support, makes support member 8 fall below minimum to the influence degree that light is propagated, while having taken into account economic benefit again.
It should be noted that a support member 8 is only schematically shown in Fig. 1, and in the distribution of the inner support member 8 of whole reflection cavity 6
It will be apparent to those skilled in the art that, therefore detailed description is omitted here.
Backlight module 10 also includes blooming piece 7, its light emission side for being arranged on Transflective diaphragm 1.
A kind of liquid crystal display device 100 is also provided according to the present invention.As shown in Fig. 2 liquid crystal display device 100 includes liquid crystal
Display screen 20 and backlight module 10.The display device 100 can for LCD TV, liquid crystal display, DPF, mobile phone,
Any product or part with display function such as panel computer.
The preferred embodiment of the present invention is the foregoing is only, but the scope of the present invention is not limited thereto, Ren Heben
The technical staff in field can easily be changed or change in technical scope disclosed by the invention, and this change or change
Change should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (6)
1. a kind of backlight module, it is characterised in that including：
Horizontally disposed bottom reflector plate,
The frame at the bottom reflector plate edge is arranged on,
The side reflector plate on the frame is fixedly installed on, the side reflector plate constitutes hollow reflection with the bottom reflector plate
Chamber,
The light source in the reflection cavity is fixedly installed on, and
Be arranged on the Transflective diaphragm at the opening of the reflection cavity, wherein, the Transflective diaphragm be overlapped on the light source and
In the side reflector plate, the one side relative with the bottom reflector plate of the Transflective diaphragm is incidence surface, the Transflective film
The another side opposite with the bottom reflector plate of piece is local reflex local transmission face, on the incidence surface of the Transflective diaphragm
It is provided for changing the projection of opticpath；
Be provided for supporting the transparent support member of the Transflective diaphragm in the reflection cavity, the support member with it is described
The non-reflective part region contact of trans diaphragm, and/or the support member is not more than 30 with the contact area of the Transflective diaphragm
Square millimeter.
2. backlight module according to claim 1, it is characterised in that the projection is configured on the Transflective diaphragm
One or more in uniform circular cone, pyramid or terrace with edge, wherein the raised area of section is by the Transflective diaphragm
Tapered on the direction of extension in the reflection cavity.
3. backlight module according to claim 1, it is characterised in that the Transflective diaphragm has printing opacity diaphragm and setting
Reflecting element on the local reflex local transmission face of the printing opacity diaphragm, wherein, the reflecting element is on the printing opacity diaphragm
It is distributed in matrix form.
4. backlight module according to claim 3, it is characterised in that the printing opacity diaphragm is by makrolon, poly- to benzene two
One kind in formic acid class plastics, polymethyl methacrylate or clear glass is made,
And/or the reflecting element is made up of the one kind in white ink, reflective ink, silver or aluminium.
5. backlight module according to claim 3, it is characterised in that the support configuration is by the Transflective film
Piece to the direction upper section area of the bottom reflector plate gradually increase it is round table-like,
And/or in the reflection cavity from centre to peripheral direction on, the support member distribution density reduces.
6. a kind of liquid crystal display device, it is characterised in that including the backlight module according to any one of claim 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092105.9A CN104676379B (en) | 2015-02-26 | 2015-02-26 | Backlight module and the liquid crystal display device comprising it |
| PCT/CN2015/073740 WO2016134553A1 (en) | 2015-02-26 | 2015-03-06 | Backlight module and liquid crystal display device containing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092105.9A CN104676379B (en) | 2015-02-26 | 2015-02-26 | Backlight module and the liquid crystal display device comprising it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104676379A CN104676379A (en) | 2015-06-03 |
| CN104676379B true CN104676379B (en) | 2017-06-30 |
Family
ID=53311784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510092105.9A Active CN104676379B (en) | 2015-02-26 | 2015-02-26 | Backlight module and the liquid crystal display device comprising it |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104676379B (en) |
| WO (1) | WO2016134553A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526215A (en) * | 2017-08-23 | 2017-12-29 | 深圳市华星光电技术有限公司 | Double-sided display backlight module and display with double faces |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5816677A (en) * | 1905-03-01 | 1998-10-06 | Canon Kabushiki Kaisha | Backlight device for display apparatus |
| KR100499140B1 (en) * | 2003-01-07 | 2005-07-04 | 삼성전자주식회사 | Backlight unit |
| CN101303478B (en) * | 2007-05-09 | 2011-09-14 | 奇美电子股份有限公司 | LCD device and backlight module |
| KR101464795B1 (en) * | 2007-05-20 | 2014-11-27 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Light recycling hollow cavity type display backlight |
| CN101109869A (en) * | 2007-08-24 | 2008-01-23 | 中山大学 | Side-in and directly-down back light module unit |
| CN101939675A (en) * | 2008-02-07 | 2011-01-05 | 3M创新有限公司 | Hollow backlight with structured film |
| JP2012507118A (en) * | 2008-10-27 | 2012-03-22 | スリーエム イノベイティブ プロパティズ カンパニー | Semi-specular hollow backlight with gradient extraction |
| US20130208505A1 (en) * | 2012-02-15 | 2013-08-15 | Shenzhen China Star Optoelectronics Technology Co. Ltd. | Backlight Module |
| CN202469764U (en) * | 2012-03-16 | 2012-10-03 | 京东方科技集团股份有限公司 | Sidelight type backlight |
| CN202660409U (en) * | 2012-07-24 | 2013-01-09 | 京东方科技集团股份有限公司 | Direct type backlight module and display device |
| CN203178513U (en) * | 2013-03-27 | 2013-09-04 | 京东方科技集团股份有限公司 | A light guiding mechanism and a side-entering backlight module |
-
2015
- 2015-02-26 CN CN201510092105.9A patent/CN104676379B/en active Active
- 2015-03-06 WO PCT/CN2015/073740 patent/WO2016134553A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN104676379A (en) | 2015-06-03 |
| WO2016134553A1 (en) | 2016-09-01 |
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