CN103162161A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN103162161A CN103162161A CN2011104075925A CN201110407592A CN103162161A CN 103162161 A CN103162161 A CN 103162161A CN 2011104075925 A CN2011104075925 A CN 2011104075925A CN 201110407592 A CN201110407592 A CN 201110407592A CN 103162161 A CN103162161 A CN 103162161A
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- backlight module
- liquid crystal
- pcb
- crystal panel
- optical diaphragm
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Abstract
The invention discloses a backlight module which comprises a lower iron frame, a light source module, a light guide plate and an optical film slice group, wherein the light source module, the light guide plate and the optical film slice group are arranged in the lower iron frame. The optical film slice group is located above the light guide plate. The light source module comprises a printed circuit board (PCB) and light emitting diodes (LEDs), wherein the LEDs are located on two sides of the light guide plate, and the PCB is used for fixing the optical film slice group and a liquid crystal panel. According to the backlight module, a rubber frame is removed, the PCB of the light source module is directly used for fixing the optical film slice group and the liquid crystal panel, so that the cost of a die is saved, the thickness of the backlight module is reduced, and assembling steps are simplified.
Description
Technical field
The present invention relates to liquid crystal display and make the field, particularly relate to a kind of backlight module and liquid crystal indicator.
Background technology
Liquid crystal display (LCD) is to utilize the variation that is clipped in electric-field intensity on liquid crystal molecule, and the power that changes the orientation control printing opacity of liquid crystal molecule shows image.In general, complete display panels backlight module, polaroid, thin film transistor (TFT) (TFT) infrabasal plate and color filter (CF) upper substrate must be arranged and the box that formed by two substrates in the layer of liquid crystal molecule of filling consist of.LCDs is passive light-emitting display device, that is to say, crystal liquid substrate itself can not be luminous, need to provide light source by backlight module.Described backlight module is comprised of backboard, light source, diffuser plate and various blooming piece usually.
General, backlight module is divided into two kinds of straight-down negative and side-light types according to the position difference of light source.The light source of down straight aphototropism mode set is positioned at the bottom of backlight module, the light utilization of the light source of described down straight aphototropism mode set is higher, can form but directly-down light source is luminous the zone that light and shade replaces, therefore need the higher diffuser plate of mist degree and larger lamp box distance to solve this problem, increased the thickness of backlight module.The light source of described side-light backlight module is positioned at a side of backlight module, the light that light source emits is converted to area source by LGP with line source, to reach brightness and uniformity requirement, the light utilization of described side-light backlight module is relatively low, the advantages such as but it is simple to have technique, and volume is frivolous.
Please refer to Fig. 1, it is the cross-sectional view of existing a kind of side-light backlight module, described backlight module comprises lamp source group 11, lower chase 16, reflector plate 12, LGP 13, glue frame 14 and blooming piece 15, glue frame 14 is assembled on lower chase 16, then with optical element, for example reflector plate 12, lamp source group 11, LGP 13, that blooming piece 15 is installed in this glue frame 14 is interior fixing.With regard to backlight module, lower chase 16 is to provide the function of backlight module and structural strength thereof, and glue frame 14 is in order to place and fixing optical element for example reflector plate 12, lamp source group 11, LGP 13, a plurality of blooming piece 15.
At present, most of LCDs adopt CCFL (cold-cathode fluorescent) backlight module, are subjected to the restriction of the CCFL characteristics of luminescence, adopt the LCD TV of CCFL backlight module, and its color reducibility is relatively poor.Along with the development of LED (Light-Emitting Diode) technology, LED is applied to the backlight module of LCDs gradually, and the light source that the LED-backlit module provides has that color reducibility is good, contrast is high, brightness is high and the fireballing advantage of light emitting control.As shown in Figure 2; application number is that 200920049769.7 Chinese patent application discloses a kind of backlight module; this backlight module comprises from the back side to positive metal coating housing 1, reflector plate 2, LGP 3, diffusion sheet 4, lower brightening piece 5, upper brightening piece 6 and the anti-dazzling screen 7 of combination successively; described LGP side is provided with LED light emitting source assembly; described LED light emitting source assembly is welded with FPC 9 by the lamp string 8 that some LED lamps are cascaded, and also is equiped with glue frame 10 under described LED light emitting source assembly.
Yet with regard to the overall structure of backlight module, optical element is indispensable, if therefore will reduce costs, must consider to adopt other element to replace original glue frame, makes structure and the function of it storing that possesses the virgin rubber frame and fixing optical element.Therefore, how utilizing other element to replace the glue frame of backlight module, is relevant dealer's difficult problem to be overcome in fact.
Summary of the invention
The object of the present invention is to provide a kind of backlight module and liquid crystal indicator, to save die cost, reduce backlight module thickness, and simplify number of assembling steps.
For solving the problems of the technologies described above, the invention provides a kind of backlight module, comprise lower chase and be arranged at described lower chase interior light source group, LGP and optical diaphragm group, described optical diaphragm group is positioned at above described LGP, described light source group comprises PCB and is arranged at LED on described PCB, described LED is positioned at the both sides of described LGP, and described PCB is in order to fixing described optical diaphragm group and liquid crystal panel.
Optionally, in described backlight module, offer through hole on described PCB, described optical diaphragm group has the ear part, and the ear of described optical diaphragm group partly is contained in described through hole.
Optionally, in described backlight module, also comprise the cushion that is arranged between described PCB and liquid crystal panel.Described cushion is adhesive tape.
Optionally, in described backlight module, the thickness of described PCB is 3mm～10mm.
Optionally, in described backlight module, also comprise a reflector plate, described reflector plate is arranged in described lower chase, and described LGP is arranged on described reflector plate.
Optionally, in described backlight module, also comprise chase on, described upper chase is covered on described liquid crystal panel and is coated on the sidewall of described lower chase.
According to another side of the present invention, a kind of liquid crystal indicator also is provided, comprise liquid crystal panel and backlight module as above.
Compared with prior art, backlight module of the present invention has omitted the glue frame, and it is directly to utilize the PCB of light source group to fix optical diaphragm group and liquid crystal panel, thereby has saved die cost, has reduced the thickness of backlight module, and can simplify number of assembling steps.
Description of drawings
Fig. 1 is the cross-sectional view of existing a kind of backlight module;
Fig. 2 is the cross-sectional view of existing another kind of backlight module;
Fig. 3 is the cross-sectional view of the backlight module of one embodiment of the invention;
Fig. 4 is the enlarged diagram of the backlight module of one embodiment of the invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the purpose of the aid illustration embodiment of the present invention lucidly.
Core concept of the present invention is to provide a kind of backlight module of glue-free frame, and described backlight module utilizes the PCB of light source group to fix optical diaphragm group and liquid crystal panel, thereby saves die cost, reduces the thickness of backlight module, and can simplify number of assembling steps.
Specifically please refer to Fig. 3 and Fig. 4, wherein, Fig. 3 is the cross-sectional view of the backlight module of one embodiment of the invention, and Fig. 4 is the enlarged diagram of the backlight module of one embodiment of the invention.Described backlight module comprises lower chase 21 and is arranged at interior light source group, LGP 22 and the optical diaphragm group 23 of described lower chase 21, described optical diaphragm group 23 is positioned at described LGP 22 tops, described light source group comprises PCB (Printed Circuit Board, printed circuit board (PCB)) 25 and be arranged at LED (Light Emitting Diode on described PCB 25, light emitting diode) 24, described LED 24 is positioned at the both sides of described LGP 22, and described PCB 25 is in order to fixing described optical diaphragm group 23 and liquid crystal panel 27.
In the present embodiment, offer through hole 251 on described PCB 25, described optical diaphragm group 23 has ear part 231, the ear part 231 of described optical diaphragm group 23 is contained in described through hole 251, so can avoid optical diaphragm group 23 to rock, avoid phase mutual friction between blooming piece and affect display quality.Certainly, in other embodiment of the present invention, also can not offer through hole on described PCB 25, and just offer groove, can realize equally the purpose of fixed optics diaphragm group 23.Perhaps, also can directly optical diaphragm group 23 and liquid crystal panel 27 be positioned over PCB 25 tops successively, equally can fixed optics diaphragm group 23 and liquid crystal panel 27.
Preferably, the size of described through hole 251 is slightly larger than the thickness of described optical diaphragm group 23, even the situation that described optical diaphragm group 23 like this is expanded with heat and contract with cold can guarantee that still it has enough spaces and holds optical diaphragm group 23.Better, the monolateral gap of described optical diaphragm group 23 is 0.2mm～0.5mm.
Wherein, described PCB 25 can be the aluminum base PCB plate, described LGP 22 can be the slimming LGP that produces via ejection shaping die pressurization technology, and the light that LED 24 emits is converted to area source by LGP 22 with line source, to reach brightness and uniformity requirement.
Further, described backlight module also comprises the cushion 29 that is arranged between described PCB 25 and liquid crystal panel 27, and described cushion 29 can play the effect of buffering when liquid crystal indicator carries out the drop impact experiment, avoid liquid crystal panel 27 to sustain damage.Described cushion 27 is preferably adhesive tape, and it not only can play the effect of buffering, also can utilize the viscosity of adhesive tape that liquid crystal panel 27 is fixed.Certainly, the present invention does not limit the material of cushion 27, and the material that can play buffering effect of other softness all within protection scope of the present invention, for example, can also be made by materials such as rubber by described cushion 29.
Better, the thickness of described PCB 25 is 3mm～10mm, can guarantee its enough bearing liquid crystal display panels and optical diaphragm group on the one hand, on the other hand can be due to the too thick weight that increases whole backlight module.
Optionally, described backlight module also comprises a reflector plate 28, and described reflector plate 28 is arranged in described lower chase 21, and described LGP 22 is arranged on described reflector plate 28.
In addition, described backlight module can also comprise chase 26 on, described upper chase 26 is covered on described liquid crystal panel 27 and is coated on the sidewall of described lower chase 21, and by means of the shielding action of upper chase 26, optical diaphragm group 23 can not be subject to ectocine and be impaired.
Continuation is with reference to figure 3 and Fig. 4; the assembling process of described backlight module is as follows: at first light source group, LGP 22 and optical diaphragm group 23 are installed in described lower chase 21; and the ear part 231 of optical diaphragm group 23 is fixed in the through hole 251 of PCB 25; again liquid crystal panel 27 is positioned on described PCB 25, and protects optical diaphragm group 23 and liquid crystal panel 27 by upper chase 26.Compared with prior art, the present invention has omitted the glue frame, and utilizes the PCB 25 of light source group to fix optical diaphragm group 23 and liquid crystal panel 27, has saved die cost, and can reduce the thickness of backlight module, simplifies number of assembling steps.
According to another side of the present invention, a kind of liquid crystal indicator also is provided, described liquid crystal indicator comprises liquid crystal panel and backlight module as above.
Although above embodiment describes the present invention in detail, those skilled in the art can also carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. backlight module, it is characterized in that, comprise lower chase and be arranged at described lower chase interior light source group, LGP and optical diaphragm group, described optical diaphragm group is positioned at above described LGP, described light source group comprises PCB and is arranged at LED on described PCB, described LED is positioned at the both sides of described LGP, and described PCB is in order to fixing described optical diaphragm group and liquid crystal panel.
2. backlight module as claimed in claim 1, is characterized in that, offers through hole on described PCB, and described optical diaphragm group has the ear part, and the ear of described optical diaphragm group partly is contained in described through hole.
3. backlight module as claimed in claim 1, is characterized in that, also comprises the cushion that is arranged between described PCB and liquid crystal panel.
4. backlight module as claimed in claim 3, is characterized in that, described cushion is adhesive tape.
5. backlight module as described in any one in claim 1 to 4, is characterized in that, the thickness of described PCB is 3mm～10mm.
6. backlight module as described in any one in claim 1 to 4, is characterized in that, described backlight module also comprises a reflector plate, and described reflector plate is arranged in described lower chase, and described LGP is arranged on described reflector plate.
7. backlight module as described in any one in claim 1 to 4, is characterized in that, described backlight module also comprises chase on, and described upper chase is covered on described liquid crystal panel and is coated on the sidewall of described lower chase.
8. a liquid crystal indicator, is characterized in that, comprises liquid crystal panel and backlight module as described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110407592.5A CN103162161B (en) | 2011-12-08 | 2011-12-08 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110407592.5A CN103162161B (en) | 2011-12-08 | 2011-12-08 | Backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN103162161A true CN103162161A (en) | 2013-06-19 |
| CN103162161B CN103162161B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110407592.5A Active CN103162161B (en) | 2011-12-08 | 2011-12-08 | Backlight module and liquid crystal display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016070453A1 (en) * | 2014-11-05 | 2016-05-12 | 深圳市华星光电技术有限公司 | Liquid crystal display apparatus and backlight module thereof |
| CN106373500A (en) * | 2016-11-04 | 2017-02-01 | 上海控易电子科技有限公司 | Liquid crystal display |
| WO2017031801A1 (en) * | 2015-08-21 | 2017-03-02 | 深圳市华星光电技术有限公司 | Liquid crystal display apparatus and backlight module thereof |
| CN110249258A (en) * | 2017-11-15 | 2019-09-17 | 瑞仪光电(苏州)有限公司 | Backlight module and display equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003882A (en) * | 2003-06-11 | 2005-01-06 | Kawaguchiko Seimitsu Co Ltd | Liquid crystal display device with backlight attached thereto |
| CN101149509A (en) * | 2006-09-22 | 2008-03-26 | 群康科技(深圳)有限公司 | Backlight module group and liquid crystal display device |
| CN101371184A (en) * | 2005-12-21 | 2009-02-18 | 索尼爱立信移动通讯股份有限公司 | Display module which is to be mounted on a PCB |
| CN201284963Y (en) * | 2009-01-14 | 2009-08-05 | 深圳市百得力电子有限公司 | Back light source structure without plastic frame design |
| CN201954404U (en) * | 2011-03-25 | 2011-08-31 | 青岛海信电器股份有限公司 | Backlight module |
-
2011
- 2011-12-08 CN CN201110407592.5A patent/CN103162161B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003882A (en) * | 2003-06-11 | 2005-01-06 | Kawaguchiko Seimitsu Co Ltd | Liquid crystal display device with backlight attached thereto |
| CN101371184A (en) * | 2005-12-21 | 2009-02-18 | 索尼爱立信移动通讯股份有限公司 | Display module which is to be mounted on a PCB |
| CN101149509A (en) * | 2006-09-22 | 2008-03-26 | 群康科技(深圳)有限公司 | Backlight module group and liquid crystal display device |
| CN201284963Y (en) * | 2009-01-14 | 2009-08-05 | 深圳市百得力电子有限公司 | Back light source structure without plastic frame design |
| CN201954404U (en) * | 2011-03-25 | 2011-08-31 | 青岛海信电器股份有限公司 | Backlight module |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016070453A1 (en) * | 2014-11-05 | 2016-05-12 | 深圳市华星光电技术有限公司 | Liquid crystal display apparatus and backlight module thereof |
| WO2017031801A1 (en) * | 2015-08-21 | 2017-03-02 | 深圳市华星光电技术有限公司 | Liquid crystal display apparatus and backlight module thereof |
| CN106373500A (en) * | 2016-11-04 | 2017-02-01 | 上海控易电子科技有限公司 | Liquid crystal display |
| CN110249258A (en) * | 2017-11-15 | 2019-09-17 | 瑞仪光电(苏州)有限公司 | Backlight module and display equipment |
| US11092735B2 (en) | 2017-11-15 | 2021-08-17 | Radiant Opto-Electronics (Suzhou) Co., Ltd | Backlight module and display device |
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| Publication number | Publication date |
|---|---|
| CN103162161B (en) | 2015-07-08 |
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