CN103925518A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN103925518A CN103925518A CN201310689543.4A CN201310689543A CN103925518A CN 103925518 A CN103925518 A CN 103925518A CN 201310689543 A CN201310689543 A CN 201310689543A CN 103925518 A CN103925518 A CN 103925518A
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- backlight module
- back light
- backboard
- liquid crystal
- crystal display
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Abstract
The invention relates to the technical field of liquid crystal displays, in particular to a backlight module and a liquid crystal display device. According to the backlight module structure and the liquid crystal display device provided by embodiments, a backlight source is directly formed on a back plate and electrically connected with a connection circuit formed on the back plate. Therefore, the backlight source need not be fixed in the backlight module through double-sided adhesive tapes, and reduction of optical quality of the backlight module, caused by temperature changes of the double-sided adhesive tapes, during using or testing, can be avoided effectively.
Description
Technical field
The present invention relates to liquid crystal display (LCD, Liquid Crystal Display) technical field, relate in particular to a kind of backlight module and liquid crystal display.
Background technology
Along with the development of lcd technology, liquid crystal display is also more and more widely used in each class of electronic devices.Backlight module is part and parcel in liquid crystal display, and in the time that liquid crystal display carries out the demonstration of image etc., it is for providing light source.
Shown in Fig. 1 is the structural representation of a kind of liquid crystal display in prior art; With reference to Fig. 1, in prior art, liquid crystal display comprises: backboard 11, glue frame 12, blooming piece 13, liquid crystal panel 14, flexible PCB 15(Flexible Printed Circuit, FPC), two-sided tape 16, back light 17, and unshowned LGP, reflecting layer etc. in Fig. 1; Wherein, the composition such as backlight 11, glue frame 12, blooming piece 13, flexible PCB 15, back light 17 and LGP be the backlight module of liquid crystal display, required light source when providing in liquid crystal display that liquid crystal panel 14 shows.With reference to Fig. 1, back light 17 is arranged on flexible PCB 15, and flexible PCB 15, for multiple back lights 17 are linked together, is connected with externally fed circuit by flexible PCB 15, realizes the stable power-supplying to back light 17.For realizing fixing to flexible PCB 15 and back light 17, two-sided tape 16 is fixed on the flexible PCB 15 that is provided with back light 17 in backlight module, for example, be fixed on glue frame, blooming piece or LGP first-class.
Shown in Fig. 1 a be in prior art liquid crystal display along back light cross section structure schematic diagram; With reference to Fig. 1 a, the back light 17 being arranged on flexible PCB 15 is arranged in a groove of glue frame 12, and the viscosity that two-sided tape 16 utilizes self is fixed on flexible PCB 15 and the back light 17 that is arranged on flexible PCB 15 in backlight module.
Above-mentioned, in prior art, back light 17 is set on flexible PCB 15, and the flexible PCB 15 that is provided with back light 17 is fixed on backlight module by two-sided tape 16, there is the deficiency of following several respects:
1, in backlight module because of use flexible PCB make display device volume excessive, be unfavorable for miniaturization liquid crystal display.
2, flexible PCB is in the time being assembled in backlight module, and assembling process is too complicated.
3, be provided with the flexible PCB of back light, utilize two-sided tape to be fixed on after backlight module, because two-sided tape in test or use procedure is easily because variations in temperature is out of shape, and then can cause the reduction of backlight module and display device optical quality.
Summary of the invention
For promoting the optical quality of backlight module and liquid crystal display, the embodiment of the present invention provides a kind of backlight module and liquid crystal display.
In first aspect, the embodiment of the present invention provides a kind of backlight module, comprising: backboard and back light; Wherein,
On described backboard, be formed with the connecting circuit that is used to described back light power supply;
Described back light is arranged on described backboard, and forms and be electrically connected with described connecting circuit.
In second aspect, the embodiment of the present invention provides a kind of liquid crystal display, comprises the backlight module of liquid crystal panel and above-mentioned first aspect.
The back light module unit structure that the embodiment of the present invention provides and liquid crystal display display device, back light is formed directly on backboard, and is electrically connected with the connecting circuit forming on backboard.Compared with back light module unit structure of the prior art, the back light module unit structure that the embodiment of the present invention provides, no longer need two-sided tape that backlight is fixed in backlight module, therefore effectively avoided use or test process in, two-sided tape is out of shape the backlight module that causes and the decline of liquid crystal display optical quality because of variations in temperature.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, does not form limitation of the invention.In the accompanying drawings:
Shown in Fig. 1 is structural representation in liquid crystal display in prior art;
Shown in Fig. 1 a be in prior art liquid crystal display along back light cross section structure schematic diagram;
Shown in Fig. 2 is back light module unit structure schematic diagram in the embodiment of the present invention one;
The embodiment of the present invention one dorsulum structural representation shown in Fig. 2 a;
Shown in Fig. 2 b be in the embodiment of the present invention one in backlight module along back light cross section structure schematic diagram;
Shown in Fig. 3 is back light module unit structure schematic diagram in the embodiment of the present invention two;
Shown in Fig. 4 is back light module unit structure schematic diagram in the embodiment of the present invention three;
Shown in Fig. 5 is liquid crystal display structural representation in the embodiment of the present invention four;
Shown in Fig. 5 a be in the embodiment of the present invention four liquid crystal display along back light cross section structure schematic diagram;
Shown in Fig. 6 is liquid crystal display structural representation in the embodiment of the present invention four.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is carried out more in detail and complete explanation.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
Shown in Fig. 2 is back light module unit structure schematic diagram in the embodiment of the present invention one; With reference to Fig. 2, back light module unit structure comprises:
Backboard 21 and back light 22.On backboard 21, be formed with the connecting circuit that is used to back light 22 to power.Back light 22 is arranged on backboard 21, and forms and be electrically connected with connecting circuit; Connecting circuit is not shown in Fig. 2.Wherein, connecting circuit refers to the circuit that the back light 22 being arranged on backboard 21 is connected in modes such as series, parallel; And, in the present embodiment, adopt photoetching technique or etching technique to form connecting circuit on backboard 21, and the connecting circuit being arranged on backboard 21 is directly connected with the externally fed circuit of back light 22, so that back light 22 is powered.
Backboard 21 is made up of sheet metal conventionally, to support miscellaneous equipment in backlight module, such as glue frame, LGP etc., play the effect of miscellaneous equipment in fixing backlight module, and the display device that ensures backlight module and application backlight module is being suitable in process in firm bonding state.
Back light 22, carries out when display device, in the process of the demonstrations such as image, providing liquid crystal panel required light source; Conventionally back light 22 is made up of luminescent device, such as LED etc.
Optionally, in the present embodiment, back light 22 surface mount on backboard 21 or back light 22 be arranged on described backboard 21 in jack mode.Surface mount adopts surface mounting technology (Surface Mounted Technology, SMT).
Optionally, in the present embodiment, back light 22 is arranged on an end of backboard 21 or is arranged on two ends that backboard 21 is relative.In the time that back light 22 is arranged on two ends of backboard 21, can carry out the demonstrations such as image at liquid crystal display time, provide more sufficient, uniform light source.
Optionally, in the present embodiment, back light 22 is at least one backlight LED light.
Optionally, in the present embodiment, back light 22 is during at least two backlight LED lights, and connecting circuit is for being connected in series at least two backlight LED lights.
Shown in Fig. 2 a is the embodiment of the present invention one dorsulum composition structural representation; Can there is following structure with reference to Fig. 2 a the present embodiment dorsulum:
Metal base plate 211, be formed on insulating barrier 212 on metal base plate 211, be formed on the copper layer 213 on insulating barrier 212; Wherein, connecting circuit forms by patterned copper layer 213.In the present embodiment, insulating barrier 212 can adopt polyimides (PI) as insulating materials.
Optionally, in the present embodiment, metal base plate 211 is aluminum soleplate or stainless steel base plate.
Shown in Fig. 2 b be in the embodiment of the present invention one in backlight module along back light cross section structure schematic diagram; With reference to Fig. 2 b, in the present embodiment, back light 22 surface mount, on backboard 21, are arranged in the fluting in glue frame 26, and form and be electrically connected (connecting circuit is not shown) with the connecting circuit forming on backboard 21.
The back light module unit structure that the present embodiment provides, back light is formed directly on backboard, and is electrically connected with the connecting circuit forming on backboard.Compared with back light module unit structure of the prior art, the back light module unit structure that the present embodiment provides, no longer need two-sided tape that backlight is fixed in backlight module, therefore effectively avoided use or test process in, two-sided tape is led the decline of the backlight module optical quality that causes of distortion because of variations in temperature.
Further, in the present embodiment, in back light module unit structure, also no longer need flexible PCB that the connecting circuit of back light is connected with the externally fed circuit of back light, reduced the volume of backlight module, be more conducive to Miniaturization Design backlight module.
Explanation in one in conjunction with the embodiments, the second embodiment is also provided, and the present invention will be described.Shown in Fig. 3 is back light module unit structure schematic diagram in the embodiment of the present invention two; With reference to Fig. 3, in the present embodiment, backlight module also comprises:
Flexible PCB 23, one end of flexible PCB 23 is fixed on backboard 21, for the power supply signal of externally fed circuit is offered to connecting circuit.
The back light module unit structure that the present embodiment provides, back light is formed directly on backboard, and is electrically connected with the connecting circuit forming on backboard.Compared with back light module unit structure of the prior art, the back light module unit structure that the present embodiment provides, no longer need two-sided tape that backlight is fixed in backlight module, therefore effectively avoided use or test process in, two-sided tape is led the decline of the backlight module optical quality that causes of distortion because of variations in temperature.
Further, in the present embodiment, when being connected with externally fed circuit with the connecting circuit on backboard forming by flexible PCB in back light module unit structure, because flexible PCB can be arranged at multiple positions of backboard, the flexibility when having promoted back light module unit structure in assembling and having designed; Meanwhile, because flexible PCB only plays connection function, compare with prior art in flexible PCB also comprise connecting circuit, area is less, also makes backlight module have more small size compared with prior art.
Explanation in one in conjunction with the embodiments, the 3rd embodiment is also provided, and the present invention will be described.Shown in Fig. 4 is back light module unit structure schematic diagram in the embodiment of the present invention three; With reference to Fig. 4, in the present embodiment, backlight module also comprises:
Glue frame 26 and LGP (LGP is not shown).
Glue frame 26 is connected with backboard 21 use fasteners 24.
LGP is arranged on glue frame 26 inner sides, for the light that guides back light 22 to send.
The back light module unit structure that the present embodiment provides, no longer needs two-sided tape that backlight is fixed in backlight module, therefore effectively avoided use or test process in, two-sided tape is led the decline of the backlight module optical quality that causes of distortion because of variations in temperature.Meanwhile, in the present embodiment, backboard is connected by fastener with glue frame, has promoted the steadiness of backlight module entirety.
In conjunction with above-described embodiment, also provide the 4th embodiment correspondence liquid crystal display of above-mentioned backlight module to describe.Shown in Fig. 5 is liquid crystal display structural representation in the embodiment of the present invention four; Comprise with reference to Fig. 5 liquid crystal display:
Backboard 31, back light 32, glue frame 33, optics module 34, liquid crystal panel 35 etc.Wherein, optics module 34 is made up of upper diffusion sheet, lower diffusion sheet, prismatic lens etc.; Liquid crystal panel 35 is made up of upper substrate, infrabasal plate etc.
Shown in Fig. 5 a be in the embodiment of the present invention four liquid crystal display along back light cross section structure schematic diagram; With reference to Fig. 5 and 5a, in liquid crystal display, be arranged on back light 32 on backboard 31 and be nested in the groove 30 that glue frame 33 opens, optics module 34 is arranged on glue frame 33, and liquid crystal panel 35 is arranged on optics module 34.
The liquid crystal display that the present embodiment provides, no longer need two-sided tape that backlight is fixed in backlight module, therefore effectively avoided liquid crystal display use or test process in, two-sided tape is out of shape the decline of the backlight module optical quality causing because of variations in temperature.
In conjunction with the embodiments four, also provide the 5th embodiment to describe liquid crystal display of the present invention.Shown in Fig. 6 is liquid crystal display structural representation in the embodiment of the present invention five; With reference to Fig. 6, in the present embodiment, liquid crystal display also comprises compared with embodiment tetra-:
Flexible PCB 36 and fastener 37.Flexible PCB 36 is for externally fed circuit is connected with the connecting circuit forming on backboard, so that back light is powered; In the present embodiment, only need a bit of flexible PCB that externally fed circuit is connected with connecting circuit.Because of compared with being provided with the flexible PCB of connecting circuit in prior art, connecting circuit in the present embodiment only need provide linkage function, compare and the flexible PCB that comprises connecting circuit of the prior art, volume is very little, is beneficial to liquid crystal display Miniaturization Design.
The liquid crystal display display device that the present embodiment provides, in improving optical quality, connects the flexibility in assembling and the design process that connecting circuit on externally fed circuit and backboard promoted backlight module by a bit of flexible PCB; , by fastener, backboard is connected with glue frame meanwhile, has promoted the steadiness of liquid crystal display.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any amendments of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (10)
1. a backlight module, is characterized in that, comprising: backboard and back light; Wherein,
On described backboard, be formed with the connecting circuit that is used to described back light power supply;
Described back light is arranged on described backboard, and forms and be electrically connected with described connecting circuit.
2. backlight module as claimed in claim 1, is characterized in that, also comprises a flexible PCB, and one end of described flexible PCB is fixed on described backboard, for the power supply signal of externally fed circuit is offered to described connecting circuit.
3. backlight module as claimed in claim 1, is characterized in that, described backboard comprises: metal base plate, be formed on insulating barrier on described metal base plate, be formed on the copper layer on described insulating barrier; Wherein said connecting circuit forms by copper layer described in patterning.
4. backlight module as claimed in claim 3, is characterized in that, described metal base plate is aluminum soleplate or stainless steel base plate.
5. backlight module as claimed in claim 1, is characterized in that, described back light surface mount on described backboard or described back light be arranged on described backboard in jack mode.
6. backlight module as claimed in claim 1, is characterized in that, described back light is arranged on an end of described backboard or is arranged on two ends that described backboard is relative.
7. backlight module as claimed in claim 1, is characterized in that, described back light is at least one backlight LED light.
8. backlight module as claimed in claim 7, is characterized in that, at described back light, during at least two backlight LED lights, described connecting circuit is for being connected in series described at least two backlight LED lights.
9. the backlight module as described in any one in claim 1-8, is characterized in that, also comprises glue frame and LGP; Wherein,
Described glue frame is connected with fastener with described backboard;
Described LGP is arranged on described glue frame inner side, for the light that guides described back light to send.
10. a liquid crystal display, is characterized in that, comprises the arbitrary described backlight module of liquid crystal panel and claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689543.4A CN103925518B (en) | 2013-12-16 | 2013-12-16 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689543.4A CN103925518B (en) | 2013-12-16 | 2013-12-16 | Backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
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| CN103925518A true CN103925518A (en) | 2014-07-16 |
| CN103925518B CN103925518B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310689543.4A Active CN103925518B (en) | 2013-12-16 | 2013-12-16 | Backlight module and liquid crystal display device |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773295A (en) * | 2016-12-21 | 2017-05-31 | 武汉华星光电技术有限公司 | A kind of backlight module |
| WO2017173701A1 (en) * | 2016-04-08 | 2017-10-12 | 深圳市华星光电技术有限公司 | Ultra-thin lcd module and liquid crystal display |
| WO2021258925A1 (en) * | 2020-06-23 | 2021-12-30 | 京东方科技集团股份有限公司 | Backplane, backlight module, and display device |
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| WO2021258925A1 (en) * | 2020-06-23 | 2021-12-30 | 京东方科技集团股份有限公司 | Backplane, backlight module, and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103925518B (en) | 2017-02-22 |
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