CN1645218A - Back light module - Google Patents
Back light module Download PDFInfo
- Publication number
- CN1645218A CN1645218A CN 200510052559 CN200510052559A CN1645218A CN 1645218 A CN1645218 A CN 1645218A CN 200510052559 CN200510052559 CN 200510052559 CN 200510052559 A CN200510052559 A CN 200510052559A CN 1645218 A CN1645218 A CN 1645218A
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- Prior art keywords
- light
- diffuser plate
- backlight module
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- 210000002445 nipple Anatomy 0.000 claims description 12
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 abstract 4
- 238000007598 dipping method Methods 0.000 description 9
- 238000002310 reflectometry Methods 0.000 description 7
- 238000007639 printing Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000004020 luminiscence type Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
A back light module consists of a diffusion plate, a side light source, a prism and light guidemirror. It is featured as setting reflection plate beneath diffusion plate, setting light source at side between diffusion plate and reflection plate, setting prism between light source and reflection plate, and setting light guidemirror at diffusion plate bottom face adjacent to side light source.
Description
[technical field]
The invention relates to a kind of backlight liquid crystal display module, and particularly need not dispose light guide plate and carry out the backlight liquid crystal display module of mixed light and leaded light relevant for a kind of.
[background technology]
LCD is because the characteristic of frivolous, in light weight, low electromagnetic of size and low power consumption has become the main flow commodity on the market in recent years.
Backlight module provides light in LCD, behind light process diffuser plate, infrabasal plate, liquid crystal molecule and the upper substrate, shows on the display surface of LCD.The backlight module system of tradition side-light type is disposed at light source the both sides of backlight module.Light source for example is light emitting diode (Light EmittingDiode), and after light carries out mixed light and leaded light via light guide plate, by the positive bright dipping of light guide plate.Traditional light mixing mechanism system carries out mixed light with the printing white reflection printing ink under the light guide plate, becomes even light when making light by the bright dipping of light guide plate front.
Yet, having under the more and more welcome trend at large-sized display, the characteristic that light guide plate weight is big will be not suitable for being applied to large-sized LCD.In addition, light guide plate and printing white reflection printing ink all can absorb light, have reduced the luminescence efficiency of backlight module, have also reduced the product quality of LCD indirectly.
[summary of the invention]
In view of this, purpose of the present invention is exactly in that a kind of backlight module is provided, and need not dispose light guide plate, just can directly carry out mixed light and leaded light in backlight module, and make backlight module have characteristic in light weight and that luminescence efficiency is good.
According to purpose of the present invention, a kind of backlight module is proposed, comprise a diffuser plate, a reflecting plate, a sidelight source and a prismatic lens.Reflecting plate is disposed at the diffuser plate below.The sidelight source is disposed at the side between diffuser plate and reflecting plate.Prismatic lens is disposed between sidelight source and reflecting plate.
According to purpose of the present invention, other proposes a kind of backlight module, comprises a diffuser plate, a reflecting plate, a sidelight source and a leaded light eyeglass.Reflecting plate is disposed at the diffuser plate below.The sidelight source is disposed at the side between diffuser plate and reflecting plate.The leaded light eyeglass is disposed at the diffuser plate bottom surface and is adjacent to the sidelight source for above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
[description of drawings]
Fig. 1 illustrates the stereographic map according to the backlight module of preferred embodiment of the present invention.
Fig. 2 A illustrates the part side view according to the backlight module of preferred embodiment of the present invention.
Fig. 2 B illustrates the incident angle and the reflectivity graph of a relation of diffuser plate.
Fig. 2 C illustrates the synoptic diagram of sidelight source light through prismatic lens.
Fig. 2 D illustrates the part side view of backlight module and sidelight source light.
[embodiment]
Please refer to Fig. 1, it illustrates the stereographic map according to the backlight module of preferred embodiment of the present invention.Backlight module 100 comprises a diffuser plate 106, a reflecting plate 140, a sidelight source 104, a prismatic lens 110 and a leaded light eyeglass (total internal reflection lens, TIR lens) 120.In the present embodiment, backlight module 100 preferably comprises a back of the body frame 150.Back of the body frame 150 has a bottom surface 150b and a side 150c.Sidelight source 104 is the both sides that several light emitting diodes are arranged in back of the body frame 150, so that light to be provided.
Please be simultaneously with reference to Fig. 1 and Fig. 2 A, Fig. 2 A illustrates the part side view according to the backlight module of preferred embodiment of the present invention.Diffuser plate 106 preferably is disposed at the top of back of the body frame 150.Reflecting plate 140 is to be disposed at diffuser plate 106 belows.Reflecting plate 140 is preferably to extend to bottom surface 150b by 104 lower ends, sidelight source, and preferably has the elevation angle 142 between reflecting plate 140 and bottom surface 150b.Sidelight source 104 is a side that is disposed at 140 of diffuser plate 106 and reflecting plates, for example is disposed at the side 150c of back of the body frame 150.And prismatic lens 110 is to be disposed at 140 of sidelight source 104 and reflecting plates.Leaded light eyeglass 120 is disposed at diffuser plate 106 bottom surfaces and is adjacent to sidelight source 104.Leaded light eyeglass 120 preferably has reflecting surface 122 and vertical plane 124.Reflecting surface 122 has an angle 126 with diffuser plate 106.Vertical plane 124 is perpendicular to diffuser plate 106.Vertical plane 124 is less than the distance of reflecting surface 122 with sidelight source 104 with the distance in sidelight source 104.In addition, form an air layer 130 between diffuser plate 106, bottom surface 150b and side 150c.
In the present embodiment, diffuser plate 106 is to be formed by plastic material.When light was incident to diffuser plate 106 by air, the relation of its reflectivity and incident angle was shown in Fig. 2 B.Please refer to Fig. 2 B, it illustrates the incident angle and the reflectivity graph of a relation of diffuser plate 106.Transverse axis is represented the incident angle of light in Fig. 2 B, and the longitudinal axis is represented reflectivity.When incident angle during less than 80 °, the reflectivity of diffuser plate 106 is low, that is incident angle is when being incident to diffuser plate 106 less than 80 ° light by air, and most light system reflects diffuser plate 106, can't the reflected back air in.When incident angle greater than 80 the time, the reflectivity of diffuser plate 106 obviously increases, that is after this moment, light was incident to diffuser plate 106, most light was in the reflected back air, can't pass through diffuser plate 106.Preferred embodiment of the present invention promptly utilizes this characteristic to increase the mixed light effect of air layer 130.Incident angle when just increasing light and being incident to the diffuser plate 106 of plastic material makes most light be able to reflected back air layer 130, to reach the purpose of abundant mixed light.Please refer to Fig. 2 A, more specifically, preferred embodiment of the present invention is to utilize the diffuser plate of plastic material 106 to cooperate prismatic lenses 110, reflecting plate 140 and leaded light eyeglass 120 integral body to reach the effect of abundant mixed light.
For structure and the characteristic that further specifies prismatic lens 110, please be simultaneously with reference to Fig. 2 A, Fig. 2 C and Fig. 2 D, Fig. 2 C illustrates the synoptic diagram of sidelight source 104 light through prismatic lens 110, and Fig. 2 D illustrates the part side view of backlight module 100 and sidelight source 104 light.Prismatic lens 110 comprises a main body 112 and several teats 114, and several teats 114 are to be formed on the main body 112.Each teat 114 has the first plane 114a and the second plane 114b.First plane 114a system is parallel to diffuser plate 106 in fact.Second plane 114b system is positioned at the top of the first plane 114a, and the first plane 114a and the second plane 114b form an acute angle 116.The teat 114 of the prismatic lens 110 that preferred embodiment of the present invention is adopted is towards sidelight source 104, can make the light by prismatic lens 110 be divided into light 104a haply
1And light 104a
2Most of light system by prismatic lens 110 is towards light 104a
1Direction advance.Light 104a
1Having an angle that reflects downwards, is that orientating reflex plate 140 is advanced, and avoids light 104a
1Directly by diffuser plate 106 bright dippings on the back of the body frame 150, mixed light fully by this.Light 104a
2System is refraction upwards, advances towards diffuser plate 106.
As light 104a
1When refracting to reflecting plate 140 down behind the prismatic lens 110,, can make light 104a because of having an elevation angle 142 between reflecting plate 140 and bottom surface 150b
1Advance towards horizontal direction by reflecting plate 140 reflection backs, increased light 104a near parallel bottom surface 150b
1Incident angle 144, make incident angle 144 haply greater than 80 °, and then avoid direct bright dipping.The angle at the elevation angle 142 depends on the distance of sidelight source 104 and prismatic lens 110, and in the preferred embodiment of the present invention, the elevation angle 142 preferably is to be about 20 °.Therefore, prismatic lens 110 is used with reflecting plate 140, can more preferably reach the purpose of abundant mixed light.In addition, the reflecting plate system that adopts of preferred embodiment of the present invention can be a mirror reflective plate (Mirror Reflector) or cloudy surface reflecting plate.
Leaded light eyeglass 120 preferably is polymethylmethacrylate (Polymethyl Methacrylate, plastic plate PMMA).As light 104a
2When being incident to leaded light eyeglass 120 up by the air layer 130 in vertical plane 124 the place aheads because the refractive index of leaded light eyeglass 120 is greater than the refractive index of air, this moment the ray refraction angle less than incident angle, make light 104a
2Direction towards the parallel diffuser plate 106 of deflection is advanced, and then has increased light 104a
2Incident angle during by 120 bright dippings of leaded light eyeglass.Therefore, light 104a
2During by 120 bright dippings of leaded light eyeglass, the light 104a of part
2Incident angle greater than the angle of total reflection, make the light 104a of this part
2In leaded light eyeglass 120, produce total reflection (Total Internal Reflection), can't pass through diffuser plate 106 bright dippings.In addition, 106 of reflecting surface 122 and diffuser plates have an angle 126.The design of angle 126 can increase the incident angle that light is incident to reflecting surface 122, and then reaches the purpose of the volume reflection that increases light.Because leaded light eyeglass 120 is to be disposed at 104 the place aheads, sidelight source, can avoid light to concentrate on the 104 the place ahead bright dippings of sidelight source effectively, and the backlight module that causes produces bright band and blanking bar, and then has increased the luminous uniformity coefficient of backlight module.
The disclosed backlight module of the above embodiment of the present invention system utilizes diffuser plate in incident angle big characteristic of reflectivity during greater than 80 °, cooperate reflecting plate, prismatic lens and leaded light eyeglass to increase the incident angle that light is incident to diffuser plate, avoid light directly by the diffuser plate bright dipping, make most light reflect via diffuser plate, be incident to air layer once more, and then reached the purpose of abundant mixed light.Because traditional light guide plate has been given up in preferred embodiment of the present invention, use air layer to carry out mixed light, alleviated the weight of backlight module, also solve light guide plate and absorb light and cause the not good problem of luminescence efficiency.Mirror reflective plate is adopted in preferred embodiment of the present invention, and more can solve traditional white reflection printing ink effectively can light-absorbing problem.In addition, the setting of leaded light eyeglass also can be avoided the generation of bright band.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (12)
1. backlight module comprises:
One diffuser plate;
One reflecting plate is disposed at this diffuser plate below;
One sidelight source is a side that is disposed between this diffuser plate and this reflecting plate; And
One prismatic lens is disposed between this sidelight source and this reflecting plate.
2. backlight module according to claim 1 is characterized in that, this backlight module more comprises a back of the body frame, and this back of the body frame comprises a bottom surface and a side at least, this diffuser plate system is disposed on this back of the body frame, and this reflecting plate system is disposed at this bottom surface, and this sidelight source system is disposed at this side.
3. backlight module according to claim 1 is characterized in that, this prismatic lens comprises:
One main body; And
A plurality of teats, be formed on this main body, and those teat systems are towards this sidelight source, wherein each those teat has one first plane and one second plane, in each those teat, this first plane system is parallel to this diffuser plate in fact, and this second plane system is positioned at the top on this first plane, and this second plane and this first plane system form an acute angle.
4. backlight module according to claim 2 is characterized in that, this reflecting plate system extends to this bottom surface from this prismatic lens lower end, and this reflecting plate and this bottom surface form an elevation angle.
5. backlight module according to claim 1 is characterized in that, more comprises a leaded light eyeglass, is disposed at this diffuser plate bottom surface and is adjacent to this sidelight source.
6. backlight module according to claim 5, it is characterized in that, this leaded light eyeglass has a reflecting surface and a vertical plane, and has an angle between this reflecting surface and this diffuser plate, this vertical plane is perpendicular to this diffuser plate, and the distance system in this vertical plane and this sidelight source is less than the distance in this reflecting surface and this sidelight source.
7. backlight module, this backlight module comprises:
One diffuser plate;
One reflecting plate is disposed at this diffuser plate below;
One sidelight source is a side that is disposed between this diffuser plate and this reflecting plate; And
One leaded light eyeglass is disposed at this diffuser plate bottom surface and is adjacent to this sidelight source.
8. backlight module according to claim 7 is characterized in that, more comprises a back of the body frame, and wherein this diffuser plate system is disposed on this back of the body frame, and this reflecting plate system is disposed at the bottom surface of this back of the body frame, and this sidelight source system is disposed at the side of this back of the body frame
9. backlight module according to claim 7, it is characterized in that, this leaded light eyeglass has a reflecting surface and a vertical plane, and has an angle between this reflecting surface and this diffuser plate, this vertical plane is perpendicular to this diffuser plate, and the distance system in this vertical plane and this sidelight source is less than the distance in this reflecting surface and this sidelight source.
10. backlight module according to claim 7 is characterized in that, more comprises a prismatic lens, is disposed between this sidelight source and this reflecting plate.
11. backlight module according to claim 10 is characterized in that, this prismatic lens comprises:
One main body; And
A plurality of teats, be formed on this main body, and those teat systems are towards this sidelight source, wherein each those teat has one first plane and one second plane, in each those teat, this first plane system is parallel to this diffuser plate in fact, and this second plane system is positioned at the top on this first plane, and this second plane and this first plane system form an acute angle.
12. backlight module according to claim 8 is characterized in that, this reflecting plate system extends to this bottom surface from this prismatic lens lower end, and this reflecting plate and this bottom surface form an elevation angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510052559XA CN100386680C (en) | 2005-02-23 | 2005-02-23 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510052559XA CN100386680C (en) | 2005-02-23 | 2005-02-23 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645218A true CN1645218A (en) | 2005-07-27 |
| CN100386680C CN100386680C (en) | 2008-05-07 |
Family
ID=34876638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510052559XA Active CN100386680C (en) | 2005-02-23 | 2005-02-23 | Back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100386680C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389349C (en) * | 2005-11-07 | 2008-05-21 | 友达光电股份有限公司 | Backlight module |
| CN102466177A (en) * | 2010-11-16 | 2012-05-23 | 奇美实业股份有限公司 | Side light type backlight module |
| CN102537775A (en) * | 2011-10-25 | 2012-07-04 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN102748655A (en) * | 2012-06-11 | 2012-10-24 | 歌尔声学股份有限公司 | Side light type light-emitting diode (LED) backlight device and achieving method thereof |
| WO2013127249A1 (en) * | 2012-02-28 | 2013-09-06 | 天地融科技股份有限公司 | Electronic device |
| CN103363448A (en) * | 2012-04-03 | 2013-10-23 | 隆达电子股份有限公司 | Light guide element, lighting module and panel lamp |
| CN105487150A (en) * | 2016-01-06 | 2016-04-13 | 利亚德光电股份有限公司 | Reflecting mask and LED display device with same |
| CN107884993A (en) * | 2017-10-24 | 2018-04-06 | 友达光电股份有限公司 | Backlight module and display device comprising same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010043176A (en) * | 1999-03-02 | 2001-05-25 | 모리시타 요이찌 | Illuminating device and display device provided with the device |
| JP2002365439A (en) * | 2001-06-08 | 2002-12-18 | Toyota Industries Corp | Light guiding body and liquid crystal display device |
| KR100873085B1 (en) * | 2002-06-22 | 2008-12-09 | 삼성전자주식회사 | Back light assembly and direct type liquid crystal display having the same |
| JP4142013B2 (en) * | 2002-11-29 | 2008-08-27 | 富士通株式会社 | Illumination device and liquid crystal display device |
-
2005
- 2005-02-23 CN CNB200510052559XA patent/CN100386680C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389349C (en) * | 2005-11-07 | 2008-05-21 | 友达光电股份有限公司 | Backlight module |
| CN102466177A (en) * | 2010-11-16 | 2012-05-23 | 奇美实业股份有限公司 | Side light type backlight module |
| CN102537775A (en) * | 2011-10-25 | 2012-07-04 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| WO2013127249A1 (en) * | 2012-02-28 | 2013-09-06 | 天地融科技股份有限公司 | Electronic device |
| CN103363448A (en) * | 2012-04-03 | 2013-10-23 | 隆达电子股份有限公司 | Light guide element, lighting module and panel lamp |
| CN102748655A (en) * | 2012-06-11 | 2012-10-24 | 歌尔声学股份有限公司 | Side light type light-emitting diode (LED) backlight device and achieving method thereof |
| CN102748655B (en) * | 2012-06-11 | 2015-12-09 | 歌尔声学股份有限公司 | A kind of side light type LED backlight source device and its implementation |
| CN105487150A (en) * | 2016-01-06 | 2016-04-13 | 利亚德光电股份有限公司 | Reflecting mask and LED display device with same |
| CN107884993A (en) * | 2017-10-24 | 2018-04-06 | 友达光电股份有限公司 | Backlight module and display device comprising same |
| US10514153B2 (en) | 2017-10-24 | 2019-12-24 | Au Optronics Corporation | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100386680C (en) | 2008-05-07 |
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Effective date of registration: 20240118 Address after: 825 Waterscreek Avenue, Unit 250, Allen, Texas 75013, USA Patentee after: Optoelectronic Science Co.,Ltd. Address before: Taiwan, China Hsinchu science and Technology Park, Hsinchu City Road, No. two Patentee before: AU OPTRONICS Corp. |
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