CN201116935Y - Light source laying structure for backlight module - Google Patents
Light source laying structure for backlight module Download PDFInfo
- Publication number
- CN201116935Y CN201116935Y CNU2007200762513U CN200720076251U CN201116935Y CN 201116935 Y CN201116935 Y CN 201116935Y CN U2007200762513 U CNU2007200762513 U CN U2007200762513U CN 200720076251 U CN200720076251 U CN 200720076251U CN 201116935 Y CN201116935 Y CN 201116935Y
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- China
- Prior art keywords
- light
- guide plate
- light guide
- light source
- backlight module
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- Expired - Lifetime
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- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005282 brightening Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The utility model relates to a light source layout structure of a back light module, which comprises a light guide plate which is provided a plurality of end edges which contain first end edges and a plurality of light sources which are arranged on the first end edges of the light guide plate, wherein the light sources respectively shoot light rays to the directions of the end edges along the light guide plate in different angles, the structure has the beneficial effects that the structure can reduce the using amount of circuit boards, but same light guide effect and brightness can be reached, and thereby the production cost is lowered.
Description
Technical field
The utility model relates to a kind of backlight modular structure, but relates in particular to a kind of backlight modular structure that can be applied to the mobile computer illuminated keyboard.
Background technology
For some electronic products, whether its operation-interface can be luminous except relating to illuminating effect, also is related to the surcharge of aspects such as visual appearance, texture.With mobile computer, its traditional keyboard just merely provides the user to key in function, but the design that some is particular about, then light source is set at the keyboard back side, cooperate this keyboard that adopts material manufacturing with light transmitting property, allow light source penetrate keyboard and visually produce back the impression that differs from conventional keyboard,, have the partial illumination effect simultaneously concurrently in order to promote the yield and quality sense; Certainly, other needs the operation-interface of luminous product also may adopt identical or approximate design.
Above-mentioned operation-interface with illumination effect, usually include a backlight module, the structure of this backlight module mainly includes a light guide plate and at least one light source, light guide plate comprises an exiting surface and at least one incidence surface, the bottom surface relative with exiting surface is usually as incidence surface, maybe can be with the side of light guide plate as incidence surface, and light source is set in this incidence surface; The front of the light guide plate blooming pieces such as brightening piece, diffusion sheet that can be sticked in regular turn by actual needs.The side-light type light guide plate that generally is used comprises wedge shape, rectangle or polygonal flat board, light source is set at the thick end of this wedge shape, and can be toward thin other end throw light, or be set at the incidence surface of this rectangle or at least one side end edge of polygon, toward away from incidence surface direction throw light.The bottom surface of light guide plate is provided with reflector plate usually, is recycled to rearrange in the light guide plate with the light reflection that will overflow light guide plate and utilizes, and prevent the backlight module light leak.Described light source can be light emitting diode (LED) or cold-cathode tube (CCFL).When the opposite side throw light, can derive by light guide plate is positive by part light from light guide plate one side for light source, and part light then can down transmit, and running into is reflected to reclaim to light guide plate behind the reflector plate rearranges.Light is derived light guide plate after by the optical texture of bottom surface of light guide plate or exiting surface, and the arrangement once more of process brightening piece and diffusion sheet, makes light be derived by predetermined visual angle or direction, to present good brilliant degree and uniformity coefficient.
As seen from Figure 1: its each light source 20 be parallel and appropriate intervals be located on the circuit board 30, this circuit board 30 is fixed in the side of light guide plate 10 again, when those light sources launch light into light guide plate simultaneously, contained the lid whole light guide plate 10.Yet such structure is used the larger area circuit board owing to necessary, so manufacturing cost is higher.
Summary of the invention
The utility model technical issues that need to address have provided a kind of light source layout structure of backlight module, are intended to solve above-mentioned defective.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: a light guide plate has the plural number end limit that comprises the first end limit; The plural number light source is located at the first end limit of this light guide plate, and those light sources are respectively with the direction throw light of different angles along this light guide plate toward other end limit.
Compared with prior art, the beneficial effects of the utility model are: can reduce the use amount of circuit board, but can reach identical light guide effect and brightness, thereby reduce manufacturing cost.
Description of drawings
Fig. 1 is for showing the laying structure synoptic diagram of light source on light guide plate of backlight module in the prior art.
Fig. 2 lays the first example structure synoptic diagram of light source for showing the utility model on light guide plate.
Fig. 3 lays the second example structure synoptic diagram of light source for showing the utility model on light guide plate.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
Fundamental purpose of the present utility model is the light source laying mode of existing backlight module, must use than the large-area circuits plate, so that the problem that manufacturing cost can't further reduce.
Principal character of the present utility model is the light source arrangement mode that changes backlight module, makes light source can be arranged on the circuit board than small size, but still can reach identical light guide effect.
A wherein technological means of the present utility model, be to lay plural light source on than the circuit board of small size one, those light sources are with arc shooting, described circuit board is fixed in the central authorities on light guide plate one end limit, make those light sources respectively with the direction throw light of different angles, thereby make light can contain the area that covers light guide plate fully along this light guide plate toward other end limit.
Another technological means of the present utility model, be to lay at least two light sources on than the circuit board of small size one, again at least two described circuit boards are located at two bands of position on light guide plate one end limit, make each zone comprise at least two light sources that have angle each other, those light sources respectively with different angles along this light guide plate toward the direction throw light on other end limit, thereby make light can contain the area that covers light guide plate fully.
With traditional backlight module in comparison, the utility model can reduce the use amount of circuit board, but can reach identical light guide effect and brightness, thereby reduces manufacturing cost.
As seen from Figure 2: it includes a flat light guide plate 1, and this light guide plate can be that the two sides is parallel flat board, also can be the positive plane that is, the back side is the clapboard on inclined-plane; The back side of light guide plate can be according to the needs in the design in conjunction with the reflector plate (not shown).Described light guide plate 1 is a kind of polygon plate body that includes the first end limit; At present embodiment, this light guide plate 1 is a rectangle.First embodiment of the present utility model is that the first end limit middle section in light guide plate 1 is provided with a circuit board 3, then lays the led light source 2 of a plurality of curved arrangements on this circuit board 3, makes each light source 2 have different ray cast angles.In Fig. 1, by the utility model light source 2 is done arc shooting, make when light source enters light guide plate 1 with ray cast, utilize the diffusion of light, so that the light that adjacent light source is throwed crossover suitably, thereby contain the area that covers whole light guide plate.
As seen from Figure 3: it includes a light guide plate 1 equally, two positions on the first end limit of this light guide plate 1 then are provided with a circuit board 3 than small size respectively, then lay at least two led light sources 2 on this circuit board 3, these two light sources 2 have suitable angle each other, make each light source 2 have different ray cast angles.At light source layout structure shown in Figure 3, when light source enters light guide plate 1 with ray cast, utilize the diffusion of light, so that the light that adjacent light source is throwed crossover suitably, thereby contain the area that covers whole light guide plate.
From Fig. 2 and light source layout structure shown in Figure 3, to compare with that shown in Figure 1 again, the employed board area of the utility model can significantly reduce, thereby reduces the manufacturing cost of backlight module.
The above person only is in order to explain the preferred embodiment of the utility model; be not that attempt is done any formal restriction to the utility model according to this; be with, all have in following relevant any modification or the change done of identical spirit, all must be included in the protection domain of the present utility model.
Claims (3)
1. the light source layout structure of a backlight module is characterized in that comprising: a light guide plate has the plural number end limit that comprises the first end limit; The plural number light source is located at the first end limit of this light guide plate, and those light sources are respectively with the direction throw light of different angles along this light guide plate toward other end limit.
2. the light source layout structure of backlight module according to claim 1, it is characterized in that: described plural light source is provided in a side of the middle section on the first end limit of this light guide plate, and in the curved arrangement of this middle section.
3. the light source layout structure of backlight module according to claim 1, it is characterized in that: described plural light source is provided in a side of at least two bands of position on the first end limit of this light guide plate, and each zone comprises at least two light sources that have angle each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762513U CN201116935Y (en) | 2007-11-16 | 2007-11-16 | Light source laying structure for backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762513U CN201116935Y (en) | 2007-11-16 | 2007-11-16 | Light source laying structure for backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201116935Y true CN201116935Y (en) | 2008-09-17 |
Family
ID=39991511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200762513U Expired - Lifetime CN201116935Y (en) | 2007-11-16 | 2007-11-16 | Light source laying structure for backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201116935Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839445B (en) * | 2009-03-20 | 2013-03-27 | 上海向隆电子科技有限公司 | Section light guide structure of light guide plate in back light module |
| CN104091713A (en) * | 2014-03-18 | 2014-10-08 | 苏州达方电子有限公司 | Backlight device and light-emitting keyboard |
-
2007
- 2007-11-16 CN CNU2007200762513U patent/CN201116935Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839445B (en) * | 2009-03-20 | 2013-03-27 | 上海向隆电子科技有限公司 | Section light guide structure of light guide plate in back light module |
| CN104091713A (en) * | 2014-03-18 | 2014-10-08 | 苏州达方电子有限公司 | Backlight device and light-emitting keyboard |
| CN104091713B (en) * | 2014-03-18 | 2016-03-30 | 苏州达方电子有限公司 | Backlight device and illuminated keyboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080917 |