CN101630089B - Backlight module and liquid crystal display applying same - Google Patents

Backlight module and liquid crystal display applying same Download PDF

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Publication number
CN101630089B
CN101630089B CN200810131517A CN200810131517A CN101630089B CN 101630089 B CN101630089 B CN 101630089B CN 200810131517 A CN200810131517 A CN 200810131517A CN 200810131517 A CN200810131517 A CN 200810131517A CN 101630089 B CN101630089 B CN 101630089B
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Prior art keywords
breasting
backlight module
main body
glue frame
backboard
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CN200810131517A
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Chinese (zh)
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CN101630089A (en
Inventor
林俊宏
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Chi Mei Optoelectronics Corp
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Chi Mei Optoelectronics Corp
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Abstract

The invention discloses a backlight module and a liquid crystal display applying the same. The backlight module at least comprises a backboard, a light source arranged on the backboard, a glue frame which is arranged on the periphery of the backboard and positioned outside the light source, and at least one optical diaphragm arranged on the glue frame. The glue frame at least comprises a main body and at least one supporting part spliced with the main body, wherein the main body and the supporting part form a supporting surface and the supporting part allows light to be transmitted. The optical diaphragm is supported on the supporting surface, and the supporting surface horizontally extends to the backlight module.

Description

Backlight module and use its LCD
Technical field
The present invention relates to a kind of plane display technique, and particularly relevant for a kind of backlight module and use its LCD.
Background technology
Lcd technology is gazed at and display technique with the fastest developing speed in the display technique of plane now most.Flourish along with lcd technology, the technology of inferior generation develops successively, and the size of LCD also increases day by day.
Please with reference to Fig. 1, it is to illustrate the display panels of known LCD and the device synoptic diagram of blooming piece.LCD 100 mainly is made up of backlight module 108 and 106 of display panels.In LCD 100, the blooming piece of backlight module 108, for example diffuser plate 102, and display panels 106 all is arranged on the glue frame 104, and by 104 supports of glue frame, wherein display panels 106 is located on the blooming piece of backlight module 108.Display panels 106 need separate and the spacing of being separated by with the blooming piece of backlight module 108; Cause the liquid crystal layer running of display panels 106 bad to avoid blooming piece to be urged to display panels 106, and then have influence on the running of display panels 106.
Because; Display panels 106 weight own can make the slightly downwarping of middle section of display panels 106; Add diffuser plate 102 and under variation of ambient temperature, can produce the phenomenon of expanding with heat and contract with cold, and cause the middle section of diffuser plate 102 to be bent upwards, such flexural deformation phenomenon causes display panels 106 to contact with diffuser plate 102 generations easily; And then wavy striped (Mura) phenomenon takes place, have a strong impact on the display quality of LCD.The flexural deformation phenomenon of display panels 106 and diffuser plate 102, along with the increase of the size of LCD 100, situation will go from bad to worse.Therefore, the size of LCD 100 is big more, and the distance between display panels 106 and the diffuser plate 102 also needs to increase relatively, can avoid contacting the wavy fringe phenomena that is caused because of display panels 106 with diffuser plate 102.
When the distance between display panels 106 and diffuser plate 102 increased, glue frame 104 need provide enough breasting faces such as diffuser plate 102 blooming pieces such as grade, comes to support reliably blooming piece.Please with reference to Fig. 2, it is to illustrate the display panels of another kind of known LCD and the device synoptic diagram of blooming piece.Likewise, LCD 200 mainly is made up of backlight module 208 and 206 of display panels, and wherein display panels 206 is located on the backlight module 208, and with the blooming piece 202 of backlight module 208 segment distance of being separated by.In LCD 200, for the breasting face of blooming piece 202 enough width that backlight module 208 is provided, and with glue frame 204 in order to the part of supporting blooming piece 202 towards the inner directions expansion of backlight module 208.
Yet the light that the light source 210 of backlight module 208 is sent can't pass through the expansion 212 of glue frame 204, and the also dull thread reflection of this expansion 212.When the onlooker when watching LCD 200 with great visual angle, can see the expansion 212 that does not have the glue frame 204 that light penetrates.Therefore, for the onlooker, will see that the subregion at the edge of LCD 200 produces blanking bar, and cause the vision taste of LCD 200 not good that display quality can't demand up to specification.
Summary of the invention
Therefore, the object of the invention is providing a kind of backlight module exactly, can be applicable to large-sized LCD.
Another object of the present invention is that a kind of backlight module is being provided, and its glue frame comprises light-permeable breasting part, and wherein the breasting part can engage with the main body of glue frame, supports blooming piece and form the breasting face that extends.Thus, can effectively enlarge the breasting face of blooming piece in that backlight module is produced under the situation of blanking bar, and then the stable support blooming piece.
Another purpose of the present invention is that a kind of LCD is being provided; Its glue frame can provide the breasting face of the enough width of blooming piece; And can not produce blanking bar, therefore can improve the vision taste of LCD, promote the display quality of display at the display surface edge of display.
According to above-mentioned purpose of the present invention, a kind of backlight module is proposed, comprise at least: a backboard; One light source is located on the backboard; One glue frame is located on the outer rim of backboard, and is positioned at the outside of light source, and wherein the glue frame comprises at least: a main body; And at least one breasting part, engage with main body, wherein main body and this breasting part form a breasting face, and breasting part light-permeable; And at least one blooming piece, be located on the glue frame, and on the breasting face of bearing against.
According to one embodiment of the present invention, above-mentioned breasting part is suspended on the backboard.
According to another preferred embodiment of the present invention, the bottom of above-mentioned breasting part engages with backboard.
According to the object of the invention, a kind of LCD is proposed, comprise a backlight module at least and be located at the display panels on the backlight module.Backlight module comprises at least: a backboard; One light source is located on the backboard; One glue frame is located on the outer rim of backboard, and is positioned at the outside of light source, and wherein the glue frame comprises at least: a main body; And at least one breasting part, engage with main body, wherein main body and breasting part form one first breasting face, and breasting part light-permeable; And at least one blooming piece, be located on the glue frame, and bear against on the first breasting face.Display panels and the blooming piece spacing of being separated by.
According to one embodiment of the present invention, above-mentioned glue frame has the one second breasting face that is higher than the first breasting face, and display panels bears against on the second breasting face.
Description of drawings
Fig. 1 illustrates the display panels of known LCD and the device synoptic diagram of blooming piece.
Fig. 2 illustrates the display panels of another kind of known LCD and the device synoptic diagram of blooming piece
Fig. 3 illustrates according to the display panels of a kind of LCD of one embodiment of the present invention and the device synoptic diagram of blooming piece.
Fig. 4 illustrates according to the display panels of a kind of LCD of another preferred embodiment of the present invention and the device synoptic diagram of blooming piece.
Description of reference numerals
100: LCD 102: diffuser plate
104: glue frame 106: display panels
108: backlight module 200: LCD
202: blooming piece 204: the glue frame
206: display panels 208: backlight module
210: light source 212: expansion
300a: LCD 300b: LCD
302a: backlight module 302b: backlight module
304: main body 306a: the breasting part
306b: breasting part 308a: glue frame
308b: glue frame 310: light source
312: blooming piece 314: display panels
316: breasting face 318: breasting face
320: backboard
Embodiment
The present invention discloses a kind of backlight module and uses its LCD.In order to make narration of the present invention more detailed and complete, can be with reference to the diagram of following description and cooperation Fig. 3 and Fig. 4.
Please with reference to Fig. 3, it is to illustrate according to the display panels of a kind of LCD of one embodiment of the present invention and the device synoptic diagram of blooming piece.LCD 300a comprises backlight module 302a and display panels 314 at least, and wherein backlight module 302a is arranged on the back side of display panels 314, to give display panels 314 backlight is provided.Backlight module 302a mainly comprises backboard 320, light source 310, glue frame 308a and at least one blooming piece 312.Backboard 320 can be metal sheet or rigid plastic plate, supports whole backlight module 302 so that enough structural strengths to be provided.Light source 310 is arranged on the backboard 320, and wherein light source 310 can for example be CCFL (CCFL) or light emitting diode (LED).
Glue frame 308a is located on the neighboring of backboard 320, and wherein light source 310 is arranged among the zone that glue frame 308a enclosed, that is glue frame 308a is in the outside of light source 310.Glue frame 308a mainly comprises main body 304 and at least one breasting part 306a, and wherein breasting part 306a engages with main body 304, and the breasting face 316 that combines to form extension of main body 304 and breasting part 306a, to provide blooming piece 312 more roomy breasting area.In an example embodiment, every side of glue frame 308a is equipped with a breasting part 306a.In other example embodiment, can be according to the product actual demand only the side in the relative both sides of glue frame 308a one breasting part 306a is set.In further embodiments, breasting part 306a can be ring type structure and is located on the medial surface of main body 304, and this moment, glue frame 308a only need be provided with a breasting part 306a.In the example embodiment of Fig. 3, the bottom of breasting part 306a does not engage with the bottom surface of backboard 320, and is suspended on the bottom surface of backboard 320.Breasting part 306a light-permeable, wherein the material of breasting part 306a for example is the light-permeable plastics.In one embodiment, the material of breasting part 306a can be selected from a material group that is made up of polycarbonate (PC), polymethylmethacrylate (PMMA) and polystyrene (PS).The material of breasting part 306a can for example be transparent plastic or translucent plastic also.Main body 304 preferably can be reflecting body, with the light of reflection source 310 directive main bodys 304.Main body 304 can adopt the white plastic material to make, and in order to the light that reflection source 310 is sent, improves the efficient of light source 310.In the glue frame 308a of embodiment structure, main body 304 also can not have good reflection, but glue frame 308a has the reflector plate of extra setting, is sticked at the medial surface of main body 304, the function of the light that comes to be sent to main body 304 cremasteric reflex light sources 310.
In one embodiment, the glue frame 308a that is constituted by main body 304 and the breasting part 306a structure that is formed in one, wherein main body 304 goes out forming technique with the making of breasting part 306a with combining dijection capable of using, thereby formed glue frame 308a is that dijection goes out molding structure.In another embodiment, the adhesions such as making double faced adhesive tape more capable of using of glue frame 308a come combining main body 304 and breasting part 306a.In the glue frame 308a of another embodiment, can be respectively equipped with holding division (not illustrating) on main body 304 and the breasting part 306a, wherein the holding division of main body 304 and breasting part 306a is corresponding respectively and can be fastened on together.For example, when the holding division of main body 304 is draw-in groove, the holding division of breasting part 306a for can corresponding be fastened on draw-in groove in trip; And when the holding division of breasting part 306a is draw-in groove, the holding division of main body 304 then for can corresponding be fastened on draw-in groove in trip.
Blooming piece 312 is arranged on the glue frame 308a, and the fringe region of blooming piece 312 is placed on the breasting face 316 that is made up of main body 304 and breasting part 306a, and 316 supports of breasting face thus.Blooming piece 312 can be one or combination of diffusion disk, prismatic lens, blast sheet or above-mentioned diaphragm.Because glue frame 308a also comprises breasting part 306a except main body 304; Can the breasting face 316 in order to supporting blooming piece 312 be extended towards backlight module 302a horizontal cross; Add breasting part 306a can let light through and from breasting part 306a refraction go out; Therefore breasting part 306a place locate can't form blanking bar; And can not limit light source 310 under the situation of the light emitting region of backlight module 302a, strengthen the breasting face 316 of glue frame 308a support blooming piece 312, and then can significantly improve the fiduciary level of the setting of blooming piece 312.So; Application through glue frame 308a framework; Not only can avoid the outer edge area of LCD 300a to produce blanking bar, and can effectively promote the display quality of LCD 300a, more can solve the reliability issues of blooming piece 312 on being provided with of large scale liquid crystal display 300a.
In this example embodiment, the main body 304 of glue frame 308a has more breasting face 318, and wherein breasting face 318 is higher than the breasting face 316 of 312 breastings of blooming piece.Display panels 314 can be arranged on the breasting face 318 of glue frame 308a, and by 318 supports of breasting face.Therefore; Display panels 314 be positioned at backlight module 302a blooming piece 312 on; Display panels 314 and the blooming piece 312 intersegmental distance of being separated by wherein influence the rotation of the interior liquid crystal of display panels 314 to prevent blooming piece 312 because of flexural deformation that variation of ambient temperature was caused.
Glue framework structure of the present invention can have the variation of other patterns.Please with reference to Fig. 4, it is to illustrate according to the display panels of a kind of LCD of another preferred embodiment of the present invention and the device synoptic diagram of blooming piece.In LCD 300b; The glue frame 308a framework of the glue frame 308b framework of its backlight module 302b and the backlight module 300a of previous embodiment is roughly the same; Difference between glue frame 308b and the 308a is that the breasting part 306b of glue frame 308b extends to the breasting face 316 of glue frame 308b from the bottom surface of backboard 320; And the bottom of breasting part 306b engages with the bottom surface of backboard 320, and breasting part 306b is hung on the backboard 320.
Can know that by above-mentioned example embodiment an advantage of the present invention is exactly because the glue frame of backlight module comprises the breasting part of light-permeable, and this breasting part can engage and form the breasting face of extension with the main body of glue frame, provide blooming piece bigger breasting area.Therefore, can effectively enlarge the breasting face of blooming piece, and then reach the purpose of stable support blooming piece in that backlight module is produced under the situation of blanking bar.
Can know by above-mentioned example embodiment; Another advantage of the present invention is exactly because the glue frame of LCD can provide the breasting face of the enough width of blooming piece; The extension breasting part of adding the glue frame can let light pass through; Thereby can not produce blanking bar at the display surface edge of LCD, and therefore can improve the vision taste of LCD, promote the display quality of display.
Can be known that by above-mentioned example embodiment another advantage of the present invention is exactly because fiduciary level is set can obtains effective lifting of the blooming piece of LCD, therefore the device technique of LCD of the present invention can be applicable in large-sized LCD.
Though the present invention discloses as above with a preferred embodiment; Right its is not in order to limit the present invention; Any those of ordinary skill in this technical field; Do not breaking away from the spirit and scope of the present invention, when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.

Claims (10)

1. backlight module comprises at least:
One backboard;
One light source is located on this backboard;
One glue frame is located on the outer rim of this backboard, and is positioned at the outside of this light source, and wherein this glue frame comprises at least:
One main body; And
At least one breasting part engages with this main body, and wherein this main body and this breasting part form a breasting face, and this breasting part light-permeable; And
At least one blooming piece is located on this glue frame, and is born against on this breasting face;
Wherein, this blooming piece is placed on this breasting face and is supported by this breasting face, and this breasting faces this backlight module horizontal cross and extends.
2. backlight module as claimed in claim 1, wherein this main body is a reflecting body of the light of this light source of reflection.
3. backlight module as claimed in claim 1, wherein this main body is provided with at least one first holding division, and this breasting part is provided with at least one second holding division that correspondence is arranged in this first holding division.
4. backlight module as claimed in claim 1, wherein this breasting part is suspended on this backboard.
5. backlight module as claimed in claim 1, wherein the bottom of this breasting part engages with this backboard.
6. LCD comprises at least:
One backlight module comprises at least:
One backboard;
One light source is located on this backboard;
One glue frame is located on the outer rim of this backboard, and is positioned at the outside of this light source, and wherein this glue frame comprises at least:
One main body; And
At least one breasting part engages with this main body, and wherein this main body and this breasting part form one first breasting face, and this breasting part light-permeable; And
At least one blooming piece is located on this glue frame, and bears against on this first breasting face; And
One display panels is located on this backlight module, and with this blooming piece spacing of being separated by;
Wherein, this blooming piece is placed on this breasting face and is supported by this breasting face, and this breasting faces this backlight module horizontal cross and extends.
7. LCD as claimed in claim 6, wherein this main body is a reflecting body of the light of this light source of reflection.
8. LCD as claimed in claim 6, wherein this main body is provided with at least one first holding division, and this breasting part is provided with at least one second holding division that correspondence is arranged in this first holding division.
9. LCD as claimed in claim 6, wherein this breasting part is suspended on this backboard.
10. LCD as claimed in claim 6, wherein the bottom of this breasting part engages with this backboard.
CN200810131517A 2008-07-16 2008-07-16 Backlight module and liquid crystal display applying same Active CN101630089B (en)

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