CN100437291C - Backlight module assembly - Google Patents
Backlight module assembly Download PDFInfo
- Publication number
- CN100437291C CN100437291C CNB2004100520712A CN200410052071A CN100437291C CN 100437291 C CN100437291 C CN 100437291C CN B2004100520712 A CNB2004100520712 A CN B2004100520712A CN 200410052071 A CN200410052071 A CN 200410052071A CN 100437291 C CN100437291 C CN 100437291C
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- Prior art keywords
- guide plate
- light guide
- module backlight
- cold
- light
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Abstract
The present invention relates to a backlight module which comprises a cold cathode lamp and a light guide plate, wherein the light guide plate comprises a light incident surface, a light exit surface and a reflecting surface opposite to the light exit surface; the cold cathode lamp is positioned at one side of the light incident surface of the light guide plate; a nanometer level silicon dioxide particulate layer is formed on the surface of at least one of a lamp pipe of the cold cathode lamp and the incident surface of the light guide plate. The backlight source provided by the backlight module has the advantages of high brightness and high uniformity, and is suitable for liquid crystal displays.
Description
[technical field]
The present invention relates to the flat-panel screens back light module unit structure.
[background technology]
The light source of non-autoluminescence flat-panel screens (as LCD) is from the planar light source module, and transmission type lcd device adopts module backlight, optical mode group before reflective display adopts.Module backlight is a kind of modular structure that linear light source (as cold-cathode tube) or point source of light (as light emitting diode) is converted to the planar light source of high brightness and face uniformity coefficient.
People such as Li Haifeng are at " liquid crystal and demonstration " Vol.18, No.1,58-62 (February, 2003), point out in " high quality lcd with frivolous backlight technical essential " literary composition that general LCD backlight module 10 is made up of twenties parts, still, the parts that influence important display qualities such as back light source brightness and homogeneity mainly contain light guide plate 11, reflectance coating 13, prism film 15, diffuser 14 and cold cathode fluorescent lamp 12 etc., as shown in Figure 1.
Wherein, light guide plate comprises an incidence surface, an exiting surface and a reflecting surface relative with exiting surface, for strengthening the brightness and the uniformity coefficient of backlight, usually form scattering pattern on its incidence surface, exiting surface or the reflecting surface, make after the light of light source (as cold cathode fluorescent lamp) emission is injected light guide plate, produce diffuse reflection, thereby can obtain the even brightness area source.
Disclose a kind of module light guide plate backlight as disclosed Chinese No. 02152017 patented claim on June 2nd, 2004, its bottom surface is to be distributed with a plurality of scattering points on the reflecting surface, it distributes and changes according to a funtcional relationship with the direction away from incidence surface, and the distribution of this scattering point can improve module bright dipping briliancy backlight and uniformity coefficient.
In addition, diffuser has the diffuse effect identical with above-mentioned scattering pattern; Reflectance coating and prism film then can be adjusted the outgoing beam direction, and light beam is mainly penetrated from the normal direction of light guide plate.Therefore in module backlight, set up diffuser, reflectance coating or the prism film of fair amount, can strengthen the brightness and the uniformity coefficient of backlight.As the 5th, 851, No. 062 United States Patent (USP) of bulletin on Dec 22nd, 1998, it discloses a kind of backlight prism film, is used to strengthen back light source brightness.
Owing to set up diffuser, reflectance coating or prism film, be unfavorable for module small light and thinization backlight, therefore, the more in recent years employing of industry forms the mode of scattering pattern on light guide plate incidence surface, exiting surface or reflecting surface, to strengthen back light source brightness and uniformity coefficient.
But above-mentioned prior art does not all design module backlight in conjunction with fluorescent tube, and fluorescent tube has indispensable effect to the lifting of back light source brightness, and therefore, the module backlight that strengthens in conjunction with fluorescent tube design brightness is real be necessity.
[summary of the invention]
The technical problem to be solved in the present invention provides a kind of module backlight that can effectively improve back light source brightness and uniformity coefficient.
The technical scheme of technical solution problem of the present invention provides a module backlight, it comprises a cold-cathode lamp and a light guide plate, this light guide plate comprises an incidence surface, an exiting surface and a reflecting surface relative with exiting surface, this cold-cathode lamp comprises a fluorescent tube and is positioned at incidence surface one side of this light guide plate, wherein at least one is formed with a scattering layer in the surface of the light tube of this cold-cathode lamp and this light guide plate incidence surface, and this scattering layer is a nanometer grade silica particulate layer.
Further, the fluorescent tube of this cold-cathode lamp is the flat body.
Further, be formed with v-depression at least one surface in the exiting surface of this light guide plate and the reflecting surface.
The incidence surface surface of cold cathode fluorescent lamp or light guide plate is formed with nanometer grade silica particulate layer in the module backlight provided by the present invention, because it has the nanometer coupling, make cold cathode fluorescent lamp and light guide plate incidence surface between the distance can be set to 10～100 microns, and in the prior art this spacing generally more than 500 microns.Distance reduces between this cold-cathode lamp and the light guide plate incidence surface, can reduce light beam and inject light guide plate optical energy loss before from fluorescent tube, thereby improve light utilization efficiency, strengthens back light source brightness.In addition, nanometer grade silica has scattering process preferably to light beam, thereby can improve the uniformity coefficient of backlight owing to its nano-grade size.
Further, the cold-cathode lamp fluorescent tube is designed to flat, makes itself promptly near an area source, helps improving the backlight uniformity coefficient.
Further, be formed with v-depression on the exiting surface of this light guide plate or the reflecting surface, lay the grain beam-emergence direction that this v-depression is adjustable mainly penetrates light beam from the normal direction of light guide plate, thereby improves back light source brightness.
[description of drawings]
Fig. 1 is a prior art back light module unit structure synoptic diagram.
Fig. 2 is cold-cathode lamp and a light guide plate synoptic diagram in the present invention's module backlight.
[embodiment]
Below in conjunction with icon module backlight provided by the present invention is described:
See also Fig. 2, module backlight provided by the present invention comprises a flat cold-cathode lamp 30 and a light guide plate 20, this light guide plate 20 can be plate shaped, also can be wedge shape, its shape is not limit, it comprises an incidence surface 21, an exiting surface 23 and a reflecting surface 22 relative with exiting surface, is formed with v-depression on reflecting surface 22 and the exiting surface 23; This cold-cathode lamp 30 is positioned at incidence surface 21 1 sides of this light guide plate 20, wherein is formed with a nanometer grade silica particulate layer 32 on the surface of the fluorescent tube 31 of this cold-cathode lamp 30.
Wherein this cold-cathode lamp 30 is designed to flat, makes itself promptly near an area source, helps improving the backlight uniformity coefficient.
Be formed with v-depression on reflecting surface 22 and the exiting surface 23, lay the grain beam-emergence direction that this v-depression is adjustable mainly penetrates light beam from the normal direction of light guide plate, thereby improves back light source brightness.Wherein the v-depression width W on the reflecting surface 22 1 is 10～100 nanometers in the present embodiment, and the v-depression width W 2 on the exiting surface 23 is 30～300 nanometers.
Be formed with a nanometer grade silica particulate layer 32 on the surface of the fluorescent tube 31 of cold-cathode lamp 30, in addition, also can form a nanometer grade silica particulate layer on the incidence surface 21.Because this nanometer grade silica particulate layer has the nanometer coupling, make cold cathode fluorescent lamp 31 and light guide plate 20 between apart from can being set to 10～100 microns, and be generally usually more than 500 microns in the prior art.Distance reduces between this cold cathode fluorescent lamp 31 and light guide plate incidence surface, can reduce light beam and inject the preceding optical energy loss of light guide plate from fluorescent tube, thereby improve light utilization efficiency, strengthens back light source brightness.In addition, nanometer grade silica has scattering process preferably to light beam, thereby can improve the uniformity coefficient of backlight owing to its nano-grade size.
Also can comprise one or more pieces reflectance coatings, prism film or diffuser (figure does not show) in the module backlight, wherein reflectance coating is arranged at reflecting surface 22 1 sides of light guide plate 20, prism film and diffuser are arranged at exiting surface 23 1 sides of light guide plate 20, and wherein diffuser is arranged between exiting surface 23 and the prism film.Lay the grain beam-emergence direction that reflectance coating and prism film are adjustable mainly penetrates light beam from the normal direction of light guide plate, thereby improves back light source brightness.Diffuser can make after cold-cathode lamp 30 emitted light beams are injected light guide plate, produces diffuse reflection, thereby improves the backlight uniformity coefficient.
Claims (10)
1. a module backlight comprises a cold-cathode lamp and a light guide plate, this light guide plate comprises an incidence surface, an exiting surface and a reflecting surface relative with exiting surface, this cold-cathode lamp comprises a fluorescent tube and is positioned at incidence surface one side of this light guide plate, it is characterized in that at least one is formed with a scattering layer in the surface of the light tube of this cold-cathode lamp and this light guide plate incidence surface, this scattering layer is a nanometer grade silica particulate layer.
2. module backlight as claimed in claim 1 is characterized in that this cold cathode fluorescent lamp is a flat.
3. module backlight as claimed in claim 1 or 2, it is characterized in that and this cold-cathode lamp and light guide plate incidence surface between distance be 10～100 microns.
4. module backlight as claimed in claim 1 or 2 is characterized in that this silicon dioxide microparticle diameter is 1～20 nanometer.
5. module backlight as claimed in claim 1 or 2 is characterized in that this scattering layer thickness is 100～1000 nanometers.
6. module backlight as claimed in claim 1 or 2 is characterized in that being formed with v-depression at least one surface in the exiting surface of this light guide plate and the reflecting surface.
7. module backlight as claimed in claim 6, the width that it is characterized in that being formed at the v-depression on the reflecting surface is 10～100 nanometers.
8. module backlight as claimed in claim 6, the width that it is characterized in that being formed at the v-depression on the exiting surface is 30～300 nanometers.
9. module backlight as claimed in claim 1 or 2, it is characterized in that this module backlight also comprises at least one reflectance coating, at least one diffuser and at least one prism film, wherein reflectance coating is arranged at reflecting surface one side of light guide plate, diffuser and prism film are arranged at exiting surface one side of light guide plate, and diffuser is between prism film and light guide plate exiting surface.
10. module backlight as claimed in claim 1 or 2, wherein this light guide plate is plate shaped or wedge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100520712A CN100437291C (en) | 2004-10-30 | 2004-10-30 | Backlight module assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100520712A CN100437291C (en) | 2004-10-30 | 2004-10-30 | Backlight module assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1766713A CN1766713A (en) | 2006-05-03 |
| CN100437291C true CN100437291C (en) | 2008-11-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100520712A Expired - Fee Related CN100437291C (en) | 2004-10-30 | 2004-10-30 | Backlight module assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN100437291C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101232059B1 (en) * | 2006-07-27 | 2013-02-12 | 삼성디스플레이 주식회사 | Dual prism sheet and backlight assembly having the same |
| CN102537762A (en) * | 2010-12-22 | 2012-07-04 | 徐平 | Integrated micro-optics backlight module |
| TWI421596B (en) * | 2010-12-31 | 2014-01-01 | Au Optronics Corp | Three-dimensional display apparatus and backlight module thereof |
| CN102425741A (en) * | 2011-11-11 | 2012-04-25 | 苏州向隆塑胶有限公司 | Luminescence module |
| CN102425745A (en) * | 2011-11-25 | 2012-04-25 | 上海向隆电子科技有限公司 | Luminescence module |
| KR101980698B1 (en) * | 2012-10-15 | 2019-05-22 | 삼성디스플레이 주식회사 | Prism sheet, back light unit and manufacturing method thereof |
| CN104459871B (en) * | 2014-12-10 | 2017-12-01 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1164645A (en) * | 1997-08-13 | 1999-03-05 | Bridgestone Corp | Plane illuminant |
| US5999685A (en) * | 1997-02-07 | 1999-12-07 | Sanyo Electric Co., Ltd. | Light guide plate and surface light source using the light guide plate |
| JP2000089032A (en) * | 1998-09-14 | 2000-03-31 | Nippon Zeon Co Ltd | Light guiding plate |
| CN2586971Y (en) * | 2002-11-28 | 2003-11-19 | 鸿富锦精密工业（深圳）有限公司 | Light leading board |
| CN1468383A (en) * | 2001-06-29 | 2004-01-14 | �ձ�������ʽ���� | Light scattering reflection substrate use photosensitive resin composition, light scattering reflection substrate, and production methods therefor |
| CN1144083C (en) * | 2001-02-20 | 2004-03-31 | 友达光电股份有限公司 | Lightguide plate fixing frame and its back lighting device |
| CN1489711A (en) * | 2001-01-31 | 2004-04-14 | 日本瑞翁株式会社 | Light guide plane and lighting unit |
-
2004
- 2004-10-30 CN CNB2004100520712A patent/CN100437291C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5999685A (en) * | 1997-02-07 | 1999-12-07 | Sanyo Electric Co., Ltd. | Light guide plate and surface light source using the light guide plate |
| JPH1164645A (en) * | 1997-08-13 | 1999-03-05 | Bridgestone Corp | Plane illuminant |
| JP2000089032A (en) * | 1998-09-14 | 2000-03-31 | Nippon Zeon Co Ltd | Light guiding plate |
| CN1489711A (en) * | 2001-01-31 | 2004-04-14 | 日本瑞翁株式会社 | Light guide plane and lighting unit |
| CN1144083C (en) * | 2001-02-20 | 2004-03-31 | 友达光电股份有限公司 | Lightguide plate fixing frame and its back lighting device |
| CN1468383A (en) * | 2001-06-29 | 2004-01-14 | �ձ�������ʽ���� | Light scattering reflection substrate use photosensitive resin composition, light scattering reflection substrate, and production methods therefor |
| CN2586971Y (en) * | 2002-11-28 | 2003-11-19 | 鸿富锦精密工业（深圳）有限公司 | Light leading board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1766713A (en) | 2006-05-03 |
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Granted publication date: 20081126 Termination date: 20171030 |