CN100346215C - Back light module and its light guide plate - Google Patents
Back light module and its light guide plate Download PDFInfo
- Publication number
- CN100346215C CN100346215C CNB2004100852455A CN200410085245A CN100346215C CN 100346215 C CN100346215 C CN 100346215C CN B2004100852455 A CNB2004100852455 A CN B2004100852455A CN 200410085245 A CN200410085245 A CN 200410085245A CN 100346215 C CN100346215 C CN 100346215C
- Authority
- CN
- China
- Prior art keywords
- guide plate
- oblique angle
- light guide
- light
- angle portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a back light module and a light guide board thereof. The back light module comprises a light guide plate and a plurality of light source groups, wherein the light guide plate is provided with a first side, a second side which is opposite to the first side, and four corners, and a bevel part is formed in each of the corners; the light source groups are respectively arranged on the first and the second sides of the light guide plate.
Description
Technical field
The present invention relates to a kind of backlight module, particularly relate to a kind of backlight module that can effectively eliminate the corner blanking bar.
Background technology
1a, 1b figure shows a known backlight module 10, it comprises a light guide plate 11, two light sources 12 and a reflector plate 13, will be appreciated that in the backlight module of reality, also to comprise other assembly, but since more irrelevant with the present invention, its explanation omitted at this.
Each light sources 12 has a fluorescent tube 12a, two insulation sleeve (bushing) 12b and reflex housing 12c that are positioned at light sources 12 two ends in order to fixed lamp tube 12a respectively, and light guide plate 11 then suitably distributes in the bottom surface and contains high diverging light source material (as SiO
2And TiO
2) printing material, by printing material the light source of light sources 12 is absorbed the character that diffusion is again emitted, destroy the internal communication that total reflection effect causes, make light by the light guide plate 11 positive luminous zones of penetrating and being uniformly distributed in backlight module 10.
Yet because the Luminance Distribution of light sources 12 is that the center is the highest, the both sides is minimum, and owing to the insulation sleeve 12b that is positioned at light sources 12 two ends is made by silicon, can absorb light source partly, and this will cause four corners of backlight module 10 to have blanking bar (mura).
Summary of the invention
In view of this, the object of the present invention is to provide a kind of backlight module, it can effectively eliminate the corner blanking bar.
In order to realize aforementioned goal of the invention, according to an aspect of the present invention, provide a kind of backlight module, comprise: a light guide plate, this light guide plate has the light inlet side at an edge that is positioned at light guide plate, and the both ends of this light inlet lateral edges form oblique angle portion respectively, and described oblique angle portion has the inclined-plane; And a light sources, this light sources is arranged at the light inlet side of this light guide plate, and has an insulation sleeve respectively at the both ends of light sources, and the position of wherein said oblique angle portion is corresponding with the position of described insulation sleeve respectively, and oblique angle portion inclined-plane is towards the insulation sleeve of correspondence.
According to a further aspect in the invention, a kind of backlight module is provided, comprises: a light guide plate, this light guide plate have one first side, are positioned at one second side and four corners of this first side opposite side, and form an oblique angle portion respectively in described these corners, described each oblique angle portion has the inclined-plane; And a plurality of light sources, be arranged at first side and second side of this light guide plate respectively, described these light sources have both ends respectively, and are respectively equipped with an insulation sleeve in described these ends, and in the oblique angle portion of this light guide plate any is corresponding with the position of described insulation sleeve respectively; The inclined-plane of described these oblique angle portions is respectively towards the insulation sleeve of correspondence.
In addition, the invention still further relates to a kind of backlight module, it comprises a light guide plate and light sources, wherein light guide plate has one first side, is positioned at one second side and four corners of the first side opposite side, and form an oblique angle portion respectively in each corner, light sources then is arranged at first side and second side of light guide plate respectively.
In a preferred embodiment, light sources has both ends respectively, and is respectively equipped with an insulation sleeve in each end, and in the oblique angle portion of light guide plate any is corresponding with the position of insulation sleeve respectively; Again, oblique angle portion has an inclined-plane respectively, and it is towards the insulation sleeve of correspondence, and the scope of the angle of inclined-plane and pedal line between 10～30 degree be preferable, and is best angle with 20 degree.
In another preferred embodiment, the reflex housing that each light sources also comprises a fluorescent tube respectively and surrounds fluorescent tube, reflex housing can be in order to the light reflected back light guide plate with another light sources, and the width of the width of oblique angle portion and insulation sleeve is roughly the same
Again in the present invention, provide another kind of backlight module, it comprises a light guide plate and a light sources, wherein light guide plate has a light inlet side, and forms an oblique angle portion in the light inlet side, and light sources is arranged at the light inlet side of light guide plate, and have an insulation sleeve, its position is corresponding with the position of an insulation sleeve.
Again in the present invention, provide a kind of light guide plate, it has four corners, and forms an oblique angle portion respectively in each corner.
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below.
Description of drawings
Fig. 1 a is the synoptic diagram for the known backlit module;
Fig. 1 b is the front view for the backlight module among Fig. 1 a;
Fig. 2 a is the synoptic diagram for backlight module of the present invention;
Fig. 2 b is the front view for the backlight module among Fig. 2 a; And
Fig. 2 c is the enlarged drawing partly of the C among Fig. 2 a.
The reference numeral explanation:
10 backlight modules
11 light guide plate
12 light sources
The 12a fluorescent tube
The 12b insulation sleeve
The 12c reflex housing
13 reflector plates
20 backlight modules
21 light guide plate
21a first side
21b second side
21c oblique angle portion
21c ' inclined-plane
22 light sources
The 22a insulation sleeve
The 22b fluorescent tube
The 22c reflex housing
23 reflector plates
Embodiment
With reference to 2a, 2b, 2c figure, backlight module 20 of the present invention comprises a light guide plate 21, a plurality of light sources 22 and a reflector plate 23, will be appreciated that in the backlight module of reality, also to comprise other assembly, but since more irrelevant with the present invention, its explanation omitted at this.
Will be appreciated that in the corner of light guide plate 21 to form the mode that the oblique angle 21c of portion can utilize injection molding, it is integrally formed directly to make design shape on mould; In addition, when the angle theta of inclined-plane 21c ' and pedal line was big more, the corner brightness increase of light guide plate 21 was big more, and preferable angle θ scope is 10～30 degree, and wherein 20 degree are best angle.
Shown in Fig. 2 a, light sources 22 is arranged at the first side 21a and the second side 21b of light guide plate 21 respectively, and has a fluorescent tube 22b, two insulation sleeve 22a and reflex housing 22c that are positioned at light sources 22 two ends in order to fixed lamp tube 22b respectively; The width d2 that it should be noted the width d1 of the 21c of oblique angle portion and insulation sleeve 22a is roughly the same, and promptly d1 is slightly less than or equals d2, is directly left and is not injected the light guide plate 21 by the 21c of oblique angle portion with the light source of avoiding being sent from fluorescent tube 22b; Again, reflex housing 22c except the source reflection that the fluorescent tube 22b of same light sources 22 can be sent go in the light guide plate 21, also can be with the light reflected back light guide plate 21 of another light sources 22, and owing to be provided with the 21c of oblique angle portion in the corner of light guide plate 21, the light source of reflection can be entered in the light guide plate 21 by the 21c of oblique angle portion again, shown in the arrow L among Fig. 2 a, and can increase the brightness in corner.
As above-mentioned, because the present invention is provided with oblique angle portion in four corners of light guide plate, and these oblique angle portions can compensate the brightness that light guide plate is adjacent to the angle of light sources two side ends towards the two ends of light sources, and then solve the problem of corner blanking bar.
In addition, though in the accompanying drawings, be two light sources to be set on the both sides of light guide plate as embodiment, but be not limited to this, for example, also can only on a side of light guide plate light sources be set, this moment, light guide plate can only be provided with formation oblique angle portion on the side of light sources, perhaps still can on four corners, all form oblique angle portion, but on the bevel angle that is provided with formation oblique angle portion on the side of light sources needs greater than a side that is not provided with light sources, form the bevel angle of oblique angle portion.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; certainly can do a little change and retouching, so protection scope of the present invention should be with being as the criterion that claims scope is defined.
Claims (10)
1. backlight module comprises:
One light guide plate, this light guide plate have the light inlet side at an edge that is positioned at light guide plate, and the both ends of this light inlet lateral edges form oblique angle portion respectively, and described oblique angle portion has the inclined-plane; And
One light sources, this light sources are arranged at the light inlet side of this light guide plate, and have an insulation sleeve respectively at the both ends of light sources, and the position of wherein said oblique angle portion is corresponding with the position of described insulation sleeve respectively, and oblique angle portion inclined-plane is towards the insulation sleeve of correspondence.
2. backlight module as claimed in claim 1 is characterized in that: the inclined-plane of described oblique angle portion and the angle perpendicular to the straight line on plane, light guide plate place are known as the angle of oblique angle portion, and the angle of described oblique angle portion is in the scopes of 10～30 degree.
3. backlight module as claimed in claim 1 is characterized in that: the angle of this described oblique angle portion is 20 degree.
4. backlight module as claimed in claim 1 is characterized in that: this light guide plate has another edge relative with the light inlet lateral edges, and described another edge has oblique angle portion respectively at both ends.
5. backlight module as claimed in claim 1 is characterized in that: this oblique angle portion width and this insulation sleeve width are roughly the same.
6. backlight module as claimed in claim 4 is characterized in that: described light sources comprises fluorescent tube and surrounds the reflex housing of this fluorescent tube.
7. backlight module as claimed in claim 4 is characterized in that: this light guide plate the angle of the oblique angle of light inlet lateral edges portion greater than with described another edge on the angle of oblique angle portion.
8. backlight module comprises:
One light guide plate, this light guide plate have one first side, are positioned at one second side and four corners of this first side opposite side, and form an oblique angle portion respectively in described these corners, and described each oblique angle portion has the inclined-plane; And
A plurality of light sources are arranged at first side and second side of this light guide plate respectively,
Described these light sources have both ends respectively, and are respectively equipped with an insulation sleeve in described these ends, and in the oblique angle portion of this light guide plate any is corresponding with the position of described insulation sleeve respectively; The inclined-plane of described these oblique angle portions is respectively towards the insulation sleeve of correspondence.
9. backlight module as claimed in claim 8 is characterized in that: the inclined-plane of oblique angle portion and the angle perpendicular to the straight line on plane, light guide plate place are known as the angle of oblique angle portion, and the angle of described oblique angle portion is in the scopes of 10～30 degree.
10. backlight module as claimed in claim 8 is characterized in that: described a plurality of light sources comprise fluorescent tube respectively and surround the reflex housing of this fluorescent tube, in order to this light guide plate of light reflected back with another light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100852455A CN100346215C (en) | 2004-10-09 | 2004-10-09 | Back light module and its light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100852455A CN100346215C (en) | 2004-10-09 | 2004-10-09 | Back light module and its light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1588200A CN1588200A (en) | 2005-03-02 |
| CN100346215C true CN100346215C (en) | 2007-10-31 |
Family
ID=34605158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100852455A Expired - Fee Related CN100346215C (en) | 2004-10-09 | 2004-10-09 | Back light module and its light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100346215C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI258041B (en) | 2005-03-11 | 2006-07-11 | Au Optronics Corp | Lamp clamping and electrically connecting device and method of assembling lamp |
| CN100353620C (en) * | 2005-04-01 | 2007-12-05 | 友达光电股份有限公司 | Tube holding and electric connecting device and tube assembling and disassembling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070431A (en) * | 1989-08-03 | 1991-12-03 | Pioneer Electronic Corporation | Display board illuminating device for passive displays |
| JP2000098383A (en) * | 1998-09-28 | 2000-04-07 | Colcoat Kk | Transparent light guiding plate and its production |
| CN1338657A (en) * | 2000-07-28 | 2002-03-06 | 株式会社日立制作所 | Liquid crystal display device |
| US20040160549A1 (en) * | 2003-02-18 | 2004-08-19 | Jae Woo Park | Liquid crystal display module |
-
2004
- 2004-10-09 CN CNB2004100852455A patent/CN100346215C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5070431A (en) * | 1989-08-03 | 1991-12-03 | Pioneer Electronic Corporation | Display board illuminating device for passive displays |
| JP2000098383A (en) * | 1998-09-28 | 2000-04-07 | Colcoat Kk | Transparent light guiding plate and its production |
| CN1338657A (en) * | 2000-07-28 | 2002-03-06 | 株式会社日立制作所 | Liquid crystal display device |
| US20040160549A1 (en) * | 2003-02-18 | 2004-08-19 | Jae Woo Park | Liquid crystal display module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1588200A (en) | 2005-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1769972A (en) | Backlight assembly improving light efficiency and display device provided with the same | |
| US20070230217A1 (en) | Back light unit and liquid crystal display device | |
| CN1731246A (en) | Optical module and positioning frame therein | |
| CN101046579A (en) | Systems for providing backlight module with stacked light source | |
| CN1900775A (en) | Backlight unit and liquid crystal display comprising the same | |
| CN1779524A (en) | Backlight assembly and liquid crystal display device having the same | |
| CN1885128A (en) | Backlight assembly including light emitting diode and display device including the same | |
| CN1896837A (en) | Backlight module without light guiding plate and diffusing plate | |
| CN1763607A (en) | Backlight lamp device and liquid crystal display device | |
| CN1737665A (en) | Display device and its backlight module | |
| CN1591132A (en) | Backlight assembly for dispay | |
| KR20090073676A (en) | Light guide plate, backlight unit and liquid crystal display having the same | |
| CN1808728A (en) | Mirror and homogeneously luminous LED utilizing the mirror | |
| US20100103343A1 (en) | Illumination device and liquid crystal display device | |
| CN1664670A (en) | Double-faced lighting device | |
| CN1854849A (en) | Liquid crystal display apparatus having a light guiding plate | |
| CN100346215C (en) | Back light module and its light guide plate | |
| US11500144B2 (en) | Light guide plate, backlight module and display device | |
| KR101365091B1 (en) | Back light assembly and liquid crystal display apparatus having the same | |
| US20120307482A1 (en) | Planar light source and backlight unit having the same | |
| CN2725942Y (en) | Backlight module | |
| CN101059580A (en) | Light guide plate, light guide unit arrangement structure and surface light source | |
| CN1302323C (en) | Luminous module and planar display comprising the luminous module | |
| US20060133111A1 (en) | Light guide plate having high-density dots | |
| CN1280659C (en) | Planar light source structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071031 Termination date: 20211009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |