CN102967896A - Light guide plate, backlight module and display device - Google Patents
Light guide plate, backlight module and display device Download PDFInfo
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- CN102967896A CN102967896A CN2012104690469A CN201210469046A CN102967896A CN 102967896 A CN102967896 A CN 102967896A CN 2012104690469 A CN2012104690469 A CN 2012104690469A CN 201210469046 A CN201210469046 A CN 201210469046A CN 102967896 A CN102967896 A CN 102967896A
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Abstract
The invention relates to a light guide plate, a backlight module and a display device, wherein the light guide plate is used for the light guide plate which comprises a light-emitting diode (LED) light source; and the light guide plate is characterized by comprising a light guide plate body and a diffusion structure for diffusing light, wherein the diffusion structure is arranged on an incident surface of the light guide plate body. The light guide plate has the beneficial effects that the light entering the light guide plate body is diffused, a combined optical length is shortened, and a Hot-spot phenomenon is prevented.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of light guide plate, backlight module and display device.
Background technology
In recent years, LED (light Emitting Diode, light emitting diode), electricity-saving lamp advantage good because of its pollution, color rendering is widely used in lighting field, under the application of the display devices such as LCD TV, laptop computer displays, LED has also replaced CCFL (Cold Cathode FluorescentLamp gradually, cathode fluorescent tube), become the back light of main flow.But different from CCFL is, for the LED-backlit source of light inlet from the side, the lamp bar that a plurality of LED form is when luminous, because the luminous characteristics of LED self, can between two LED illuminating sources, form dark section, and at the dead ahead of LED illuminating source formation speck, this phenomenon becomes Hot-spot(firefly phenomenon).This phenomenon can cause the edge brightness homogeneity of the display devices such as liquid crystal display television to reduce, thereby affects the quality of whole picture.
As shown in Figure 1, the light of a plurality of led light sources 1 shines light guide plate 2, and the scope scope as shown by arrows in FIG. of each led light source irradiation can form clear zone 3 and dark space 4 in light guide plate 2 like this.It is the Hot-spot phenomenon.
Pursue the factor affecting such as attractive in appearance on the market, narrow frame design is used more and more, but because the led light source that generally uses is pointolite, must produce the phenomenon of light and shade inequality in the light inlet side, the uneven zone length of this section light and shade depends on distance between the LED, and because frame narrows down, the distance of covering the light and shade uneven phenomenon is also shortening, force the necessary close-packed arrays of LED, cause the raising of cost.
For the phenomenon that solves the light and shade inequality that led light source produces and reduce cost, generally in the prior art adopt the technique of carrying out laser engraving and injection mo(u)lding at the light inlet end face, but because the former working (machining) efficiency is not high, the engraving structure is separated in power consumption still need to be than large space.The latter only limits to use in the small size.So use few in market.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of light guide plate, backlight module and display device, the Hot-spot phenomenon of avoiding the LED pointolite to cause.
In order to achieve the above object, the technical solution used in the present invention is: a kind of light guide plate, and the light guide plate for comprising led light source comprises:
Light conducting plate body;
Be used for the diffusion structure that light spreads, be arranged on the incidence surface of described light conducting plate body.
Further, described diffusion structure comprises:
Be evenly distributed on incidence surface and the refractive index a plurality of diffusion particles different from the refractive index of described light guide plate of described light conducting plate body;
Syndeton for carrying described a plurality of diffusion particles is connected with the incidence surface of described light conducting plate body.
Further, the spherical structure made of described a plurality of diffusion particle high material of refractive index that is the described light conducting plate body of refractive index ratio.
Further, described syndeton is the tack coat that the UV adhesive curing forms.
Further, all be connected by a part of described tack coat between the incidence surface of each described diffusion particle and described light conducting plate body.
Further, the incidence surface of described tack coat is a smooth planar structure.
The present invention also provides a kind of backlight module, comprises above-mentioned light guide plate.
The present invention also provides a kind of display device, comprises above-mentioned backlight module.
The present invention also provides a kind of display device, comprises above-mentioned backlight module.
The invention has the beneficial effects as follows: the light that will enter described light conducting plate body produces diffusion effect, shortens the mixed light distance, avoids the generation of Hot-spot phenomenon.
Description of drawings
Fig. 1 represents the luminous synoptic diagram of backlight module in the prior art;
Fig. 2 represents light guide plate part-structure synoptic diagram of the present invention;
Fig. 3 represents diffusion structure light synoptic diagram of the present invention;
Fig. 4 represents the luminous synoptic diagram of backlight module of the present invention.
Embodiment
Below in conjunction with accompanying drawing structure of the present invention and principle are elaborated, illustrated embodiment only is used for explaining the present invention, is not to limit protection scope of the present invention with this.
Generation for fear of the Hot-spot phenomenon, the invention provides a kind of light guide plate, be used for comprising the backlight module of led light source, as shown in Figure 2, backlight module comprises light conducting plate body 2 and led light source 1 in the present embodiment, the light of described led light source 1 enters described light conducting plate body 2 via the incidence surface of described light conducting plate body 2, and the incidence surface of described light conducting plate body 2 is provided with the diffusion structure for the light diffusion.
The light that enters light conducting plate body 2 is spread first, and the light that led light source sends can come in scattering, shortens the LED light mixing distance, has avoided the generation of Hot-spot phenomenon.
In the present embodiment, described diffusion structure comprises:
Be evenly distributed on incidence surface and the refractive index a plurality of diffusion particles 5 different from the refractive index of described light conducting plate body 2 of described light conducting plate body 2;
Syndeton for carrying described a plurality of diffusion particle 5 is connected with described light conducting plate body 2.
The version of described diffusion particle 5 has multiple, as long as its refractive index is different from the refractive index of described light conducting plate body 2, the effect that reaches the light diffusion gets final product.
In the low situation of the refractive index of the described light conducting plate body 2 of the refractive index ratio of described diffusion particle 5, for example, diffusion particle 5 is air or simple glass, light can produce total reflection easily between described light conducting plate body 2 and described diffusion particle 5, thereby reduce the utilization factor of the light of led light source 1 emission, so generation for fear of the Hot-spot phenomenon, and under the prerequisite of the light utilization of simultaneously consideration raising led light source 1, in the present embodiment, described diffusion particle 5 adopts the high material of refractive index of the described light conducting plate body 2 of refractive index ratio to make.
In the present embodiment, described diffusion particle 5 is made for the high material of refractive index of the described light conducting plate body 2 of refractive index ratio.
Described diffusion particle 5 can be the grain pattern of rule or irregular geometric configuration, its volume size also can be set as required, for example, described diffusion particle 5 can be triangular pyramidal shape, rhombus etc., but the diffusion particle 5 of said structure shape in actual use, because the angle of placing is different, the refraction of light, the effect of reflection difference can't determine that then the light diffusion effect is best.
So for fear of the generation of above-mentioned situation, in the present embodiment, the spherical structure that described diffusion particle 5 is made for dense flint glass, synthetic quartz or polycarbonate.
Adopt the said structure form, so that the realization of light diffusion effect is simple, efficient, and the refractive index of the described light conducting plate body 2 of refractive index ratio of the materials such as dense flint glass, synthetic quartz or polycarbonate is high, be difficult for producing total reflection and cause light losing, and the transmittance of above-mentioned several materials is more intense, and light utilization further is provided.
Here it is to be noted, the selection of described diffusion particle material is not limited to the selection of the materials such as above-mentioned dense flint glass, synthetic quartz or polycarbonate, selected material satisfies water white transparency, and the refractive index of refractive index ratio light conducting plate body is high, and the conditions such as easy processing get final product.
In order to guarantee the light diffusion effect, described spherical structure is unsuitable excessive, and unsuitable too small, because the too little shape that then can't guarantee diffusion particle 5 of volume, in the present embodiment, the diameter of described spherical structure is 50um～100um.
Break away from for fear of described diffusion particle 5 and light conducting plate body 2, described diffusion structure comprises that for the syndeton that described diffusion particle 5 is fixed on the incidence surface of described light guide plate 2 in the present embodiment, described syndeton is the tack coat 6 that the UV adhesive curing forms.
In the present embodiment, the basically identical UV glue of described tack coat 6 employing refractive indexes and described light conducting plate body 2 refractive indexes is made.The selection of the material of certain described tack coat 6 is not limited to this, as long as the refractive index of the material PMMA that refractive index and described light conducting plate body 2 adopt is basically identical, preferably the material of described tack coat 6 employings has the material PMMA that adopts with described light conducting plate body 2 and has identical character, avoid light that refraction and generation bright line occur between described tack coat 6 and described light conducting plate body 2, thereby can't obtain the uniform brightness of light and shade.
In order to increase the utilization factor of light, the transmittance of described tack coat 6 also will meet the requirements.
In the present embodiment, in order to reach best optical effect, the thickness of tack coat 6 adopts about 0.5mm, and the thickness of tack coat 6 can not expose to the frame that is used for lightguide plate fixing body 2 of display device, to prevent bright line occurring at display panel.
All be connected by a part of described tack coat 6 between the incidence surface of each described spherical structure and described light conducting plate body 2.Be each described spherical structure with the incidence surface of described light conducting plate body 2 all less than directly contacting, in order to avoid described spherical structure contacts part generation slight crack with the incidence surface of described light conducting plate body 2, affect the trend of light, even affect the connective stability of described diffusion structure and described light conducting plate body 2.
In order to improve the transmittance of described tack coat 6, improve the utilization factor of light, the incidence surface of described tack coat 6 is a smooth planar structure, so that the easier light guide plate of injecting of the light that led light source 1 sends.
As shown in Figure 3 and Figure 4, then the light that led light source 1 sends enter light conducting plate body 2 through the diffusion of diffusion particle 5, eliminated the phenomenon of light and shade inequality, and dash area represents to enter the uniform light of light conducting plate body 2 interior light and shades among Fig. 4.
In the present embodiment, the fabrication processing of described diffusion structure is as follows:
With the monolithic LGP(light conducting plate body 2 that cuts) sheet material is as in the middle of the dividing plate, compresses (dividing plate is to be bonded together and can't to separate for adjacent two light conducting plate body that prevent from spraying behind the UV glue);
On the incidence surface of light conducting plate body 2, evenly apply the diffusion particle 5 of spherical structure;
At the UV glue of described diffusion particle 5 spraying liquid conditions, spray the complete UV that carries out and solidify;
After the UV adhesive curing forms tack coat 6, the incidence surface of tack coat 6 is carried out polishing, so that the incidence surface of tack coat 6 forms smooth planar structure.
Wherein, if UV glue spraying is abundant, so that in the UV solidification process, UV glue relies on the character such as the gravity, tension force of this province, so that the incidence surface nature level of the tack coat 6 that UV forms after solidifying does not then need to carry out polishing.
In the above-mentioned technological process, spray first diffusion particle 5 because be, then spray UV glue, so situation that can exist diffusion particle 5 and the incidence surface of light conducting plate body directly to contact, the easy like this part that contacts in diffusion particle 5 and light conducting plate body 2 produces slight crack etc., can affect the trend of light like this, even affect the connective stability of described diffusion structure and described light guide plate 2.
For fear of the appearance of the problems referred to above, in the present embodiment, before spraying diffusion particle 5, the incidence surface in light conducting plate body 2 sprays the liquid UV glue of one deck first, guarantees the connective stability of diffusion particle 5 and light conducting plate body 2 after UV solidifies.
Preferably, the present invention also provides a kind of backlight module, and this backlight module comprises aforesaid light guide plate.
Preferably, the present invention also provides a kind of display device, and this display device comprises aforesaid backlight module.Described display device can be any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer.
The above is preferred embodiment of the present invention, should be pointed out that to those skilled in the art, under the prerequisite that does not break away from principle of the present invention, can also make some improvements and modifications, and these improvements and modifications also should be considered as protection domain of the present invention.
Claims (8)
1. light guide plate is used for comprising it is characterized in that the light guide plate of led light source, comprising:
Light conducting plate body;
Be used for the diffusion structure that light spreads, be arranged on the incidence surface of described light conducting plate body.
2. light guide plate according to claim 1 is characterized in that, described diffusion structure comprises:
Be evenly distributed on incidence surface and the refractive index a plurality of diffusion particles different from the refractive index of described light conducting plate body of described light conducting plate body;
Syndeton for carrying described a plurality of diffusion particles is connected with the incidence surface of described light conducting plate body.
3. light guide plate according to claim 2 is characterized in that, the spherical structure that the high material of refractive index that described a plurality of diffusion particles are the described light conducting plate body of refractive index ratio is made.
4. light guide plate according to claim 3 is characterized in that, described syndeton is the tack coat that the UV adhesive curing forms.
5. light guide plate according to claim 4 is characterized in that, all is connected by a part of described tack coat between the incidence surface of each described diffusion particle and described light conducting plate body.
6. light guide plate according to claim 5 is characterized in that, the incidence surface of described tack coat is a smooth planar structure.
7. a backlight module is characterized in that, comprises each described light guide plate of claim 1-6.
8. a display device is characterized in that, comprises backlight module claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104690469A CN102967896A (en) | 2012-11-19 | 2012-11-19 | Light guide plate, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104690469A CN102967896A (en) | 2012-11-19 | 2012-11-19 | Light guide plate, backlight module and display device |
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| CN102967896A true CN102967896A (en) | 2013-03-13 |
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| CN2012104690469A Pending CN102967896A (en) | 2012-11-19 | 2012-11-19 | Light guide plate, backlight module and display device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943785A (en) * | 2013-06-18 | 2014-07-23 | 厦门天马微电子有限公司 | Optical adjustment film and manufacturing method thereof |
| CN105003863A (en) * | 2014-04-25 | 2015-10-28 | 欧姆龙株式会社 | Manufacturing method of area light source device, area light source device, displaying device, and electronic device |
| CN106324889A (en) * | 2015-07-07 | 2017-01-11 | 南京瀚宇彩欣科技有限责任公司 | Backlight module and display device |
| CN108693597A (en) * | 2018-08-01 | 2018-10-23 | 京东方科技集团股份有限公司 | Light guide structure and its manufacturing method, backlight module, liquid crystal display device |
| CN111367009A (en) * | 2020-04-10 | 2020-07-03 | 博讯光电科技(合肥)有限公司 | Light guide plate with novel structure |
| CN111477117A (en) * | 2019-01-24 | 2020-07-31 | 深圳光峰科技股份有限公司 | L ED display screen and preparation method thereof |
| CN113267935A (en) * | 2021-01-05 | 2021-08-17 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
| CN113267936A (en) * | 2021-01-05 | 2021-08-17 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
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| CN101078834A (en) * | 2006-05-24 | 2007-11-28 | 统宝光电股份有限公司 | Electronic device and its backlight module |
| CN102338297A (en) * | 2010-07-22 | 2012-02-01 | 歌尔声学股份有限公司 | LED (Light-emitting Diode) backlight module and display equipment with same |
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2012
- 2012-11-19 CN CN2012104690469A patent/CN102967896A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101078834A (en) * | 2006-05-24 | 2007-11-28 | 统宝光电股份有限公司 | Electronic device and its backlight module |
| CN102338297A (en) * | 2010-07-22 | 2012-02-01 | 歌尔声学股份有限公司 | LED (Light-emitting Diode) backlight module and display equipment with same |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943785A (en) * | 2013-06-18 | 2014-07-23 | 厦门天马微电子有限公司 | Optical adjustment film and manufacturing method thereof |
| CN105003863A (en) * | 2014-04-25 | 2015-10-28 | 欧姆龙株式会社 | Manufacturing method of area light source device, area light source device, displaying device, and electronic device |
| CN105003863B (en) * | 2014-04-25 | 2017-10-10 | 欧姆龙株式会社 | Manufacture method, planar light source device, display device and the electronic equipment of planar light source device |
| CN106324889A (en) * | 2015-07-07 | 2017-01-11 | 南京瀚宇彩欣科技有限责任公司 | Backlight module and display device |
| CN108693597A (en) * | 2018-08-01 | 2018-10-23 | 京东方科技集团股份有限公司 | Light guide structure and its manufacturing method, backlight module, liquid crystal display device |
| CN111477117A (en) * | 2019-01-24 | 2020-07-31 | 深圳光峰科技股份有限公司 | L ED display screen and preparation method thereof |
| CN111367009A (en) * | 2020-04-10 | 2020-07-03 | 博讯光电科技(合肥)有限公司 | Light guide plate with novel structure |
| CN113267935A (en) * | 2021-01-05 | 2021-08-17 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
| CN113267936A (en) * | 2021-01-05 | 2021-08-17 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
| CN113267936B (en) * | 2021-01-05 | 2022-12-27 | 青岛海信移动通信技术股份有限公司 | Electronic terminal |
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Application publication date: 20130313 |