CN1144083C - Lightguide plate fixing frame and its back lighting device - Google Patents
Lightguide plate fixing frame and its back lighting device Download PDFInfo
- Publication number
- CN1144083C CN1144083C CNB011046988A CN01104698A CN1144083C CN 1144083 C CN1144083 C CN 1144083C CN B011046988 A CNB011046988 A CN B011046988A CN 01104698 A CN01104698 A CN 01104698A CN 1144083 C CN1144083 C CN 1144083C
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- groove
- location division
- imports
- guide plate
- height
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- 230000008676 import Effects 0.000 claims description 62
- 230000011514 reflex Effects 0.000 claims description 17
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention provides a back light device which comprises a light guide plate, a reflecting hood, a lamp tube and a frame. The present invention is characterized in that the guide plate also comprises a protruded clamping block which is arranged on a clamping side surface of the light guide plate, a side frame of the frame is provided with a first guide groove, a second guide groove and a positioning part, wherein an end surface of the first guide groove is aligned with an end surface of the positioning part, the first guide groove is communicated with the positioning part, an end surface of the second guide groove is aligned with the other end surface of the positioning part, and the second guide groove is communicated with the positioning part. When the protruded clamping block is guided into the positioning part by the first and the second guide grooves, the light guide plate can be fixed by the frame.
Description
Technical field
The present invention relates to a kind of back lighting device (back light), particularly a kind of structure-improved that improves packaging efficiency, reduces the back lighting device of light guide plate spoilage.
Background technology
Figure 1A is the stereographic map that shows a kind of known backlight liquid crystal display device.As shown in the figure, known back lighting device comprises a framework 10, a light guide plate 40 and a reflex housing 30.Screw on reflex housing 30 usefulness screws 35 and the framework 10 (indicating) combines, and the side 32 of reflex housing 30 is fixed on the framework 10.
Figure 1B is the exploded view that shows back lighting device among Figure 1A.As shown in the figure, a reflector plate 20 is arranged on the framework 10.Then light guide plate 40 is placed on the reflector plate 20, and a pair of projection 42 on the light guide plate 40 is placed in the pickup groove 12 of framework 10.One fluorescent tube 34 is placed in the reflex housing 30, and the two sides 32 of reflex housing 30 are fixed on the framework 10 with 15 combinations of the screw on screw 35 and the framework 10 respectively.And then a pervasion component (diffusing means) 50 more is arranged on the light guide plate 40, so that finish the configuration of this back lighting device.This pervasion component comprises a diffusion thin plate (diffusingsheet) 52, at least one prism thin plate 54 and a protective film 56.At last, a display panel as a liquid crystal panel 60, is arranged on this back lighting device, in order to form a display, and a LCD for example.
By Figure 1B as can be known, 10 of frameworks comprise three frames, and the opening of pickup groove 12 upwards, so lightguide plate fixing has only three directions stressed, and the intensity of having only the framework of three frames is not enough, and this design can not be enough to protect light guide plate.
With reference to figure 1C, show another kind of framework 11 among the figure again.For the ability that prevents frame deformation and increase the frame fixation light guide plate, framework 11 has four frames, and the pickup groove 13 of framework is arranged in the frame 111, and the opening of pickup groove 13 is towards light guide plate 40.In the process of assembling back lighting device, framework 11 is strutted, be beneficial to the outstanding fixture block 42 of light guide plate 40 is packed in the pickup groove 13 of framework 11.Like this, be out of shape because of the application of force is excessive, destroy light guide plate 40 or pervasion component 50 all the better easily as framework 11.
In addition, when back lighting device was vibrated or be placed upside down, light guide plate was loosening easily or break away from framework, and the light guide plate surface is scratch infringement easily also, and perhaps the distance between light guide plate and the fluorescent tube changes easily, thereby influences optical effect.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of backlight liquid crystal display device, and it comprises: a light guide plate, a reflex housing, a fluorescent tube and a framework.Light guide plate has a bottom surface, an incident side and is positioned at two engaging sides of these both sides, incident side.Reflector plate is arranged on the bottom surface side of light guide plate.Reflex housing has the reflecting surface towards above-mentioned incident side, and is positioned at the dual side-edge supporting member that extend towards above-mentioned light guide plate direction above-mentioned reflecting surface both sides.Fluorescent tube utilizes above-mentioned dual side-edge supporting member to be arranged in the reflex housing.
The invention is characterized in that light guide plate also comprises at least two outstanding fixture blocks, they are separately positioned on two engaging sides of above-mentioned light guide plate.In addition, be respectively equipped with one first on a pair of relative frame of framework and import groove, one second an importing groove and a location division, first end face that imports groove aligns with an end face of location division, and first import groove and be communicated with the location division, second end face that imports groove aligns with the other end of location division, and the second importing groove is communicated with the location division.Above-mentioned outstanding fixture block can utilize the above-mentioned first importing groove and the second importing groove guides to go in the above-mentioned location division, with fixing above-mentioned light guide plate.
The a pair of relative frame of said frame comprises one first locating device and one second locating device respectively.Above-mentioned first locating device has first and imports the groove and first reference column, and above-mentioned second locating device has second and imports the groove and second reference column.Wherein, above-mentioned first imports the distance of the opening of groove to above-mentioned first reference column, with above-mentioned second opening that imports groove to the distance of above-mentioned second reference column and, greater than the height of frame.
On the other hand, back lighting device provided by the invention is applicable to a LCD.This back lighting device comprises; One light guide plate, it has an engaging side; One outstanding fixture block, it is formed on this engaging side; And one the location frame, this location frame has a frame height H.Above-mentioned location frame has one first importing groove towards this light guide plate side, this first importing groove has one first height h
1, the first width d
1One second imports groove, and this second importing groove has one second height h
2, the second width d
2And a location division, this location division has one the 3rd and highly is h
3, the 3rd width D.The first first groove end face that imports groove aligns with first end face of location division, and the second second groove end face that imports groove aligns with second end face of location division, and the first importing groove, second imports groove and the location division three is interconnected.
Wherein, first import recess width d
1With the second importing recess width d
2Sum is more than or equal to location division width D (d
1+ d
2〉=D), first imports groove height h
1, second import groove height h
2With location division height h
3Sum is less than or equal to the frame height H (h that locatees frame
1+ h
2+ h
3≤ H).Above-mentioned outstanding fixture block can import groove guides by the first importing groove and second goes in the location division, in order to lightguide plate fixing.In addition, outstanding fixture block has one the 4th height h
4And one the 4th width d
4, and outstanding fixture block width is less than or equal to location division width D (d
4≤ D), outstanding fixture block height is less than or equal to the height h of location division
3(h
4≤ h
3).Light guide plate has a light guide plate height h
5, outstanding fixture block height is less than or equal to light guide plate height (h
4≤ h
5).
An advantage of the present invention is by being arranged in the location division of framework in light guide plate, to make light guide plate be difficult for loosening or displacement, reduction light guide plate spoilage.
Description of drawings
Figure 1A shows a kind of stereographic map of known backlight liquid crystal display device;
Figure 1B shows a kind of split figure of known backlight liquid crystal display device;
Fig. 1 C shows a kind of synoptic diagram of framework of known backlit device;
Fig. 2 shows the three-dimensional exploded view of the back lighting device of first embodiment of the invention;
Fig. 3 A to Fig. 3 C shows the side view of the location frame of back lighting device of the present invention; And
Fig. 4 A to 4C shows the assembly drawing of light guide plate and framework.
Embodiment
Fig. 2 represents the three-dimensional exploded view of backlight liquid crystal display device of the present invention.As shown in Figure 2, back lighting device of the present invention comprises a light guide plate 100, a reflector plate 200, a reflex housing 300, a fluorescent tube 340 and a framework 700.
Reflex housing 300 has the reflecting surface 310 towards above-mentioned incident side, and the dual side-edge supporting member 320 that extends towards above-mentioned light guide plate two engaging sides 130 directions from above-mentioned reflecting surface 310 both sides respectively, and fluorescent tube 340 then is fixedly installed in the reflex housing 300.Reflex housing 300 is admitted fluorescent tubes 340, and utilizes the reflecting surface 310 in the reflex housing 300, the light reflected back light guide plate 100 that fluorescent tube 340 is dispersed.In addition, the light of bottom surface 120 that penetrates light guide plate 100 by reflector plate 200 and once more reflection enter in the light guide plate 100.
Framework 700 have a pair of location frame 720 with a pair of be connected frame 710,710 ', wherein each connect frame 710,710 ' two ends connect two location frames 720 respectively.Each location frame 720 has one first importing groove 730, one second an importing groove 750 and a location division 740 (as shown in Figure 3A) on a side 720a of light guide plate 100.The location division is arranged on the inboard of location frame, in order to lightguide plate fixing 100, first imports groove has an end face, it aligns with an end face of location division, and be arranged on the inboard of location frame and be communicated with the location division, second imports groove has an end face, and it aligns with the other end of location division, and is arranged on the inboard of location frame and is communicated with above-mentioned location division.
Fig. 3 A and Fig. 3 B are the side views that location of the present invention frame two imports groove end face distance size.First kind of size relationship as shown in Figure 3A, first import the both ends of the surface 730a of groove 730 and 730b apart from d
1And second import the both ends of the surface 750a of groove 750 and 750b apart from d
2Sum equals the distance D of the both ends of the surface 740a and the 740b of location division 740, i.e. d
1+ d
2=D.Second kind of size relationship then shown in Fig. 3 B, first import the both ends of the surface 730a of groove 730 and 730b apart from d
1And second import the both ends of the surface 750a of groove 750 and 750b apart from d
2Sum is greater than two ends 740a and the distance D of 740b, the i.e. d of location division 740
1+ d
2＞D.
Shown in Fig. 3 A and Fig. 3 B, first import the both ends of the surface 730a of groove 730 and 730b apart from d
1And second import the both ends of the surface 750a of groove 750 and 750b apart from d
2Sum needs the distance more than or equal to the both ends of the surface 740a and the 740b of location division 740, i.e. d
1+ d
2〉=D.
With reference to figure 3C, Fig. 3 C is 720 liang of side views that import the groove height size of location of the present invention frame.Wherein, the inboard of each location frame 720 has one first locating device 760 and one second locating device 770.First locating device 760 has first and imports the groove 730 and first reference column 761, and second locating device 770 has the second importing groove 750 and second reference column 771.First imports the height h of groove
1Equate that with the first reference column height second imports the height h of groove
2Equate with the second reference column height.Location division 740 has a height h
3, location frame 720 has a height H.And the height h of first reference column 761
1, second reference column 771 height h
2With " the height h of location division 740
3" three's sum, be less than or equal to the height H of locating frame 720, i.e. h
1+ h
2+ h
3≤ H.In addition, the outstanding fixture block 150 of light guide plate has a height h
4An and width d
4, the width of this outstanding fixture block 150 is less than or equal to location division width D, i.e. d
4≤ D, the height of this outstanding fixture block 150 is less than or equal to the height of location division, i.e. h
4≤ h
3In addition, light guide plate 100 has a light guide plate height h
5, and the height of outstanding fixture block 150 is less than or equal to the height of this light guide plate, i.e. h
4≤ h
5That is to say the height h of first reference column 761
1, second reference column 771 height h
2Height h with outstanding fixture block 150
4Three's sum is less than or equal to the height H of locating frame 720, i.e. h
1+ h
2+ h
4≤ H.
Therefore for an outstanding fixture block 150 with D size, as size conforms (1) d of above-mentioned each organ
1+ d
2〉=D and (2) h
1+ h
2+ h
3These two size relationships of≤H then can be guaranteed light guide plate 100 rotation in the frame 720 of location successfully, and promptly link together abreast with 720 one-tenth zero angles of frame.
Fig. 4 A to Fig. 4 C shows the stereographic map of light guide plate and frame combination process.Shown in Fig. 4 A, the plane included angle on the plane of light guide plate 100 and framework 720 limits is θ, and the outstanding fixture block 150 of light guide plate 100 is aimed at the first importing groove 730 of location frame 720.Shown in Fig. 4 B, the outstanding fixture block 150 of light guide plate 100 imports groove 730 from first and enters, and occupies first simultaneously and imports the segment space that groove 730, second imports groove 750 and location division 740.At last, shown in Fig. 4 C, rotation light guide plate 100, making light guide plate 100 and framework 720 parallel is that angle is 0, and then makes and give prominence to fixture block 150 and be fixed in the location division 740.So just finished the combination of light guide plate 100 with framework 700.
In addition, the outstanding fixture block of light guide plate also can oppositely import groove from second and enter, and occupies first simultaneously and imports the segment space that groove, second imports groove and location division.At last, finish the combination of light guide plate and framework.
In addition, when first import the both ends of the surface 730a of groove 730 and 730b apart from d
1, with second import the both ends of the surface 750a of groove 750 and 750b apart from d
2Sum is slightly larger than two ends 740a and the distance D of 740b, the i.e. d of location division 740
1+ d
2During＞D; Then will have a little gaps between light guide plate 100 and the framework 720, but coplanar tilt angle theta of the light guide plate plane and the leg of frame is not really strict, is being to increase efficiency of assembling.
Have, a pervasion component (diffusing means) is arranged on the light guide plate again, wherein comprises diffusion thin plate (diffusing sheet), a prism thin plate and a protective film in regular turn respectively.Reflex housing can combine with light guide plate with framework.At last, a liquid crystal panel is arranged on the pervasion component, forms a LCD.
Among the present invention, can use framework, comprise that two location frames and two connect frame, can increase the structural strength of framework like this with four frames.
Though the present invention discloses with a preferred embodiment; but be not that any those of ordinary skill in the art is not breaking away under the spirit and scope of the invention condition in order to qualification the present invention; can do a little change and retouching, so protection scope of the present invention is when being defined with accompanying claims.
Claims (14)
1. the framework of a lightguide plate fixing (700) comprising:
One location frame (720), described location scuncheon has a location division (740) respectively, one first imports groove (730) and one second imports groove (750), the described first importing groove (730) has an end face and aligns with an end face of described location division (740), and be communicated with described location division (740), and the described second importing groove (750) has an end face and aligns with the other end of described location division, and be communicated with described location division, wherein said first imports the distance of the both ends of the surface of groove, with described second import groove both ends of the surface distance and, distance more than or equal to two ends, described location division
Described first imports the distance of the both ends of the surface of groove, less than the distance of the both ends of the surface of described location division, and described second distance that imports the both ends of the surface of groove, less than the distance of the both ends of the surface of described location division.
2. framework as claimed in claim 1, its middle frame has a plurality of frames (720) and links to each other, at least two relative described scuncheons comprise respectively: one first locating device (760), and it has one first and imports groove (730) and one first reference column (761); And one second locating device (770), it has one second and imports groove (750) and one second reference column (771).
3. framework as claimed in claim 2, the length of the length of wherein said first reference column and second reference column and, be less than or equal to described location division both ends of the surface distance.
4. a back lighting device is useful in the LCD, and it comprises reflector plate (200), reflex housing (300), fluorescent tube (340), wherein also comprises:
One light guide plate (100), the two engaging sides that it has a bottom surface (120), a light incident side and is positioned at both sides, described light incident side have an outstanding fixture block (150) respectively on described engaging side; And
One framework (700), it has a plurality of frames and links to each other, wherein at least two relative described scuncheons have one first importing groove (730), one second an importing groove (750) and a location division respectively, described first end face that imports groove aligns with an end face of described location division and is communicated with, and described second end face that imports groove aligns with the other end of described location division and is communicated with;
Described outstanding fixture block (150) can import groove guides by the described first importing groove and second goes in the described location division, with fixing described light guide plate.
5. back lighting device as claimed in claim 4, wherein said first imports the distance of groove both ends of the surface, with described second import the groove both ends of the surface distance and, more than or equal to the distance at two ends, described location division.
6. back lighting device as claimed in claim 4, wherein said first imports the distance of the both ends of the surface of groove, less than the distance of the both ends of the surface of described location division, and described second distance that imports the both ends of the surface of groove, less than the distance of the both ends of the surface of described location division.
7. back lighting device as claimed in claim 4, wherein said scuncheon has one first locating device and one second locating device respectively, described first locating device comprises that first imports groove and one first reference column, described second locating device comprises that second imports groove and one second reference column, described first imports the distance of the opening of groove to described first reference column, with described second opening that imports groove to the distance of described second reference column and, greater than the height of this location frame.
8. back lighting device as claimed in claim 7, the length of the length of wherein said first reference column and second reference column and, be less than or equal to the distance of described location division both ends of the surface.
9. back lighting device as claimed in claim 4, the height of wherein said outstanding fixture block is less than or equal to the height of described light guide plate.
10. back lighting device as claimed in claim 4 also comprises:
One reflex housing, it has towards a reflecting surface of described light incident side and is positioned at the dual side-edge supporting member that extend towards described light guide plate direction described reflecting surface both sides;
One fluorescent tube, it utilizes described dual side-edge supporting member to be arranged in the described reflex housing;
One reflector plate, it is arranged on described bottom surface side; And
One pervasion component, it is arranged between a liquid crystal panel and the described light guide plate.
11. back lighting device as claimed in claim 10, wherein said pervasion component comprise a protective film, a prismatic thin plate, a diffusion thin plate successively, wherein said protective film is arranged on described light guide plate top.
12. a back lighting device, it is applicable to LCD, comprising:
One light guide plate (100), it has an engaging side;
One outstanding fixture block (150), it is formed on the described engaging side; And
One location frame (720), this location frame has a frame height H, and described location frame is towards described light guide plate side, and it has
One first imports groove (730), and this first importing groove has one first height h
1, the first width d
1
One second imports groove (750), and this second importing groove has one second height h
2, the second width d
2And
One location division (740), this location division have one the 3rd and highly are h
3, the 3rd width D;
The described first first groove end face that imports groove aligns with first end face of described location division, the described second second groove end face that imports groove aligns with second end face of described location division, and this first importing groove, this second importing groove and this location division three are interconnected;
First imports recess width d
1With the second importing recess width d
2Sum is more than or equal to location division width D (d
1+ d
2〉=D), and the first importing groove height h
1, second import groove height h
2With location division height h
3Sum is less than or equal to the frame height H (h that locatees frame
1+ h
2+ h
3≤ H);
Described outstanding fixture block can utilize the described first importing groove and the second importing groove guides to go in the described location division, with fixing described light guide plate.
13. back lighting device as claimed in claim 12, wherein outstanding fixture block has one the 4th height h
4And one the 4th width d
4, the width of outstanding fixture block is less than or equal to location division width D (d
4≤ D), the height of outstanding fixture block is less than or equal to the height h of location division
3(h
4≤ h
3).
14. back lighting device as claimed in claim 13, wherein light guide plate has a light guide plate height h
5, the height of outstanding fixture block is less than or equal to light guide plate height (h
4≤ h
5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011046988A CN1144083C (en) | 2001-02-20 | 2001-02-20 | Lightguide plate fixing frame and its back lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011046988A CN1144083C (en) | 2001-02-20 | 2001-02-20 | Lightguide plate fixing frame and its back lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1371018A CN1371018A (en) | 2002-09-25 |
| CN1144083C true CN1144083C (en) | 2004-03-31 |
Family
ID=4653989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011046988A Expired - Lifetime CN1144083C (en) | 2001-02-20 | 2001-02-20 | Lightguide plate fixing frame and its back lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1144083C (en) |
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- 2001-02-20 CN CNB011046988A patent/CN1144083C/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1371018A (en) | 2002-09-25 |
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