CN100498454C - Backlight module set and its light guide plate - Google Patents
Backlight module set and its light guide plate Download PDFInfo
- Publication number
- CN100498454C CN100498454C CNB2005101008181A CN200510100818A CN100498454C CN 100498454 C CN100498454 C CN 100498454C CN B2005101008181 A CNB2005101008181 A CN B2005101008181A CN 200510100818 A CN200510100818 A CN 200510100818A CN 100498454 C CN100498454 C CN 100498454C
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- light guide
- guide plate
- fluorescent tube
- projection
- triangle
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Abstract
A back light module relates to two light guide plates to be in opposite way, forming each of two light guide plates by a light incoming surface and a light outgoing surface, arranging a numbers of lamp tubes between said light incoming surfaces, setting a numbers of the first ledge sets on said light incoming surfaces separately at region facing to lamp tube in interval way, arranging the second ledge between adjacent first ledge sets and setting region in facing to the first ledge set on light outgoing surface to be concave surface. The method for preparing said light guide plate is also disclosed.
Description
[technical field]
The present invention relates to backing structure, but relate in particular to the module backlight of double-side, and the light guide plate and this manufacturing method of light conducting board that are applied to this module backlight.
[background technology]
In general LCD, need to use module backlight as light source, and module backlight can be divided into side-light type and straight-down negative two big classes usually according to the difference of structure.
Side-light type module backlight only adopts single tubes or two tubes as light source usually, utilizes light guide plate design to strengthen control to light going direction, yet because light going direction control is difficult for, so display effect is relatively poor usually.Comparatively speaking, the design of down straight aphototropism mode set is that the fluorescent tube as light source is placed under the module backlight, because of accommodation space becomes big, thus can use the fluorescent tube more than two to increase the intensity of light source, thereby be applicable to portable and the more not fastidious general LCD of space requirement.
As shown in Figure 1, a kind of down straight aphototropism mode set 1 of prior art comprises a reflecting plate 14, a plurality of fluorescent tube 13, a light guide plate 10, a prismatic lens 11 and a diffusion sheet 12.Wherein reflecting plate 14 is positioned at the bottommost of down straight aphototropism mode set 1, reflects to light guide plate 10 in order to the light that fluorescent tube 13 is sent.Fluorescent tube 13 is the light source of down straight aphototropism mode set.Light guide plate 10 is arranged on the reflecting plate 14.Prismatic lens 11 is arranged on the light guide plate 10, and diffusion sheet 12 is arranged on the prismatic lens 11.Light guide plate 10 is with light scatter that with diffusion sheet 12 effects to adjust the uniformity coefficient of light, the effect of prismatic lens 11 is optically focused, to increase the brightness of module 1 backlight.
Module 1 backlight causes the bright dipping of module 1 backlight inhomogeneous can be brighter than other zone of module 1 backlight with fluorescent tube 13 corresponding zones easily.
In addition, because liquid crystal panel only is positioned at the one side of module 1 backlight with respect to diffusion sheet 12, therefore, fluorescent tube 13 is towards the light of another side institute scattering, only can be reflected by reflecting plate 14, can reach the function that shows with light, module 1 backlight like this has not only consumed light utilization at the light reflex time, and the single face Presentation Function can only be provided, and underuse light.
[summary of the invention]
In view of this, module backlight, light guide plate and the method for manufacturing light guide plate that is necessary to provide a kind of luminous uniformity coefficient height and can effectively improves the light source utilization factor.
A kind of module backlight, comprise some fluorescent tubes and two light guide plate that are oppositely arranged, this two light guide plate comprises an incidence surface and an exiting surface relative with this incidence surface respectively, these some fluorescent tubes are between above-mentioned two light guide plate incidence surfaces, and the incidence surface of above-mentioned two light guide plate is arranged at intervals with some first set of protrusions respectively over against the zone of fluorescent tube; Be provided with one second projection between adjacent first set of protrusions; Above-mentioned exiting surface is a concave surface over against the zone of first projection.
Described exiting surface is a cloudy surface.
A kind of light guide plate comprises an incidence surface and an exiting surface relative with this incidence surface, and above-mentioned incidence surface is arranged at intervals with some first set of protrusions; Be provided with one second projection between adjacent first set of protrusions; Above-mentioned exiting surface is a concave surface over against the zone of first projection.
Described exiting surface is a cloudy surface.
A kind of method of making above-mentioned light guide plate may further comprise the steps:
One mother module core and a male model benevolence are provided;
At the pattern of mother module core surface working formation with the complementation of light guide plate exiting surface;
At the pattern of male model benevolence surface working formation with the complementation of light guide plate incidence surface;
With male and female die matched moulds, carry out ejection formation;
The demoulding forms light guide plate.
The method of the above-mentioned light guide plate of described manufacturing is further comprising the steps of: on the surface that processing obtains having atomized surface effect through electrode discharge, mother module core surface.
With respect to prior art, described module backlight is a double-side formula module backlight, makes same module backlight can supply two liquid crystal panel utilizations, and not only display frame simultaneously also can make the light utilization of module backlight improve.In addition, first set of protrusions of light guide plate incidence surface has played the effect of scattered beam in the module backlight, makes bright dipping even; And work with concave surface one, can reduce module backlight and light source light intensity, avoid this area light intensity too high, thereby reach the purpose of even outgoing over against the zone.Further, second projection of incidence surface also is used for scattering from the light of light source, makes bright dipping more even.
Further, the cloudy surface of light guide plate exiting surface is scattered beam further, makes the emergent ray of module backlight more even.
[description of drawings]
Fig. 1 is the schematic cross-section of prior art module backlight;
Fig. 2 is that embodiment of the invention module backlight is along fluorescent tube schematic cross-section radially;
Fig. 3 is the stereographic map of embodiment of the invention light guide plate that module backlight adopts;
Fig. 4 is the stereographic map that embodiment of the invention module backlight adopts another angle of light guide plate;
Fig. 5 is that embodiment of the invention light guide plate that module backlight adopts is along fluorescent tube schematic cross-section radially;
Fig. 6 is the enlarged diagram of the VI part of Fig. 5;
Fig. 7, Fig. 8 are the enlarged diagram of first set of protrusions of two kinds of forms in addition along the fluorescent tube radial section;
Fig. 9 is the enlarged diagram of the IX part of Fig. 5;
Figure 10 is the enlarged diagram of second projection of another kind of form along the fluorescent tube radial section.
[embodiment]
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 2, be the embodiment of the present invention's module backlight.This module 2 backlight comprises two light guide plate 20, some fluorescent tubes 23, digonous eyeglass 21, two diffusion sheets 22 and a housing 25.
Two light guide plate 20 are that the plane of symmetry is symmetrical arranged with some fluorescent tubes 23 formed plane that is arranged in parallel, and comprise an incidence surface 201 and an exiting surface 202 relative with incidence surface 201 respectively, below only one of them are described.The incidence surface 201 of light guide plate 20 comprises first set of protrusions 2011 that some intervals are provided with, between first set of protrusions 2011 that between two adjacent first the set of protrusions 2011 and two ends of light guide plate 20 are adjacent is one second projection 2012, wherein, the height of second projection 2012 is greater than first set of protrusions 2011, and second projection 2012 that is oppositely arranged of two light guide plate 20 is closed up mutually, so that form a cavity between two relative first set of protrusions 2011 of two light guide plate 20, be used to place fluorescent tube 23.The light that 2011 groups of this first set of protrusions and second projection 2012 are sent in order to diffusion fluorescent tube 23.It is the concave surface 2021 of arc that exiting surface 202 is provided with along fluorescent tube cross section radially in the zone relative with fluorescent tube 23, and wherein, concave surface 2021 is along the radius of curvature R of the concave arc of the fluorescent tube radial section radius-of-curvature r greater than fluorescent tube 23 radial sections.Being appreciated that concave surface 2021 can also be other form, is concave surface of V-arrangement etc. such as the radial section along fluorescent tube.
See also Fig. 3, exiting surface 202 other zone except that concave surface 2021 is the plane.In addition, exiting surface 202 can also be cloudy surface, can play the effect of diffusion light.
See also Fig. 4 and Fig. 5, first set of protrusions 2011 is a plurality of triangular prisms, and it is a plurality of triangles along fluorescent tube cross section radially.Second projection 2012 is trapezoidal along fluorescent tube cross section radially, and this trapezoidal base in light guide plate 20 outsides is short compared to another base.
Seeing also Fig. 6, is the enlarged diagram of the VI part of Fig. 5, and first set of protrusions 2011 is a plurality of triangles, and this triangle is θ towards one jiao the angle in light guide plate 20 outsides, and angle θ scope is 60 °～150 °.Except that triangle, the radial section of first set of protrusions 2011 also can be a plurality of other shapes, as Fig. 7, first set of protrusions 2011 ' for a plurality of wherein one jiao be the triangle of rounding; Or as Fig. 8, first set of protrusions 2011 " be a plurality of circular arcs etc.
See also Fig. 9 and Figure 10.Fig. 9 is the enlarged diagram of the IX part of Fig. 5, and second projection 2012 is trapezoidal, and these trapezoidal two waists are being Φ towards light guide plate 20 lateral direction angulations, and angle Φ scope is 80 °～175 °.Except that trapezoidal, the radial section of second projection 2012 also can be other shape, and as triangle of Figure 10 etc., wherein this triangle is Φ ' towards the angle of light guide plate 20 lateral direction, and angle Φ ' scope is 80 °～175 °.
Be appreciated that two light guide plate 20 also can be incomplete same, the concave surface 2021 of first set of protrusions 2011, second projection 2012 and the exiting surface 202 of its incidence surface 201 can change in parameter area separately.
Compared to prior art, the incidence surface 201 of the light guide plate 20 in the module backlight 2 of present embodiment has first set of protrusions 2011 and second projection 2012, all has the effect with the light diffusion, makes module 2 bright dippings backlight even.The concave surface 2021 that the exiting surface 202 of light guide plate 20 is provided with over against the zone of fluorescent tube and over against first set of protrusions, 2011 actings in conjunction of fluorescent tube 23 with the light diffusion of module 2 backlight over against the zone of fluorescent tube 23, makes bright dipping more even.In addition, exiting surface adopts the cloudy surface design, can make the bright dipping of module 2 backlight more even.
Further, module 2 backlight can supply two liquid crystal panel utilizations, and not only display frame simultaneously can also make the light utilization of module 2 backlight improve.
The present invention also provides the ejection formation manufacture method of an above-mentioned light guide plate 20, and it may further comprise the steps:
One mother module core and a male model benevolence are provided;
At the pattern of mother module core surface working formation with 202 complementations of light guide plate exiting surface;
At the pattern of male model benevolence surface working formation with 201 complementations of light guide plate incidence surface;
With male and female die matched moulds, carry out ejection formation;
The demoulding forms light guide plate.
In addition, if exiting surface 202 is when be cloudy surface, can after forming the pattern that has with exiting surface 202 complementations, the mother module core surface working carry out following step again: process the exiting surface that obtains having atomized surface effect through electrode discharge on the mother module core surface.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (16)
1. module backlight, comprise some fluorescent tubes and two light guide plate that are oppositely arranged, this two light guide plate comprises an incidence surface and an exiting surface relative with this incidence surface respectively, these some fluorescent tubes is characterized in that between above-mentioned two light guide plate incidence surfaces: the incidence surface of above-mentioned two light guide plate is arranged at intervals with some first set of protrusions respectively over against the zone of fluorescent tube; Be provided with one second projection between adjacent first set of protrusions; Above-mentioned exiting surface is a concave surface over against the zone of first set of protrusions.
2. module backlight as claimed in claim 1 is characterized in that, described exiting surface is a cloudy surface.
3. module backlight as claimed in claim 1 is characterized in that, described fluorescent tube is a cold-cathode fluorescence lamp.
4. module backlight as claimed in claim 1 is characterized in that, described first projection along fluorescent tube cross section radially be triangle, arc or wherein one jiao be the triangle of rounding.
5. module backlight as claimed in claim 1 is characterized in that, described first projection is a triangle along fluorescent tube cross section radially, and this triangle is 60 °～150 ° over against the angular range at the angle of fluorescent tube.
6. module backlight as claimed in claim 1 is characterized in that, described second projection is a triangle or trapezoidal along fluorescent tube cross section radially.
7. module backlight as claimed in claim 6 is characterized in that, described triangle all is 80 °～175 ° over against the angle or the scope of trapezoidal two waists at the angle that is become over against the fluorescent tube direction of fluorescent tube.
8. module backlight as claimed in claim 1 is characterized in that, described concave surface is concave arc or V-arrangement along fluorescent tube cross section radially.
9. module backlight as claimed in claim 8 is characterized in that the radius-of-curvature of described concave arc is greater than the radius-of-curvature of fluorescent tube radial section.
10. a light guide plate comprises an incidence surface and an exiting surface relative with this incidence surface, and it is characterized in that: above-mentioned incidence surface is arranged at intervals with some first set of protrusions; Be provided with one second projection between adjacent first set of protrusions; Above-mentioned exiting surface is a concave surface over against the zone of first projection.
11. light guide plate as claimed in claim 10 is characterized in that, described exiting surface is a cloudy surface.
12. light guide plate as claimed in claim 10 is characterized in that, the described first projection cross section is triangle, arc or the triangle that contains a rounding.
13. light guide plate as claimed in claim 10 is characterized in that, described concave surface cross section is concave arc or V-arrangement.
14. light guide plate as claimed in claim 10 is characterized in that, the described second projection cross section is a triangle or trapezoidal.
15. a method for manufacturing light guide plate is used for making as each described light guide plate of claim 10 to 14, may further comprise the steps:
One mother module core and a male model benevolence are provided;
At the pattern of mother module core surface working formation with the exiting surface complementation of light guide plate;
At the pattern of male model benevolence surface working formation with the incidence surface complementation of light guide plate;
With male and female die matched moulds, carry out ejection formation;
The demoulding forms light guide plate.
16. method for manufacturing light guide plate as claimed in claim 15 is characterized in that, described mother module core surface forms after the pattern step, and is further comprising the steps of: on the surface that processing obtains having atomized surface effect through electrode discharge, mother module core surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101008181A CN100498454C (en) | 2005-10-28 | 2005-10-28 | Backlight module set and its light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101008181A CN100498454C (en) | 2005-10-28 | 2005-10-28 | Backlight module set and its light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955806A CN1955806A (en) | 2007-05-02 |
| CN100498454C true CN100498454C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101008181A Expired - Fee Related CN100498454C (en) | 2005-10-28 | 2005-10-28 | Backlight module set and its light guide plate |
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| CN (1) | CN100498454C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813295B (en) * | 2010-04-01 | 2012-01-11 | 福建捷联电子有限公司 | Direct type light guide plate structure of double-sided liquid crystal display |
| CN102829392A (en) * | 2012-07-26 | 2012-12-19 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN105467505A (en) * | 2016-01-05 | 2016-04-06 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030156234A1 (en) * | 2002-02-19 | 2003-08-21 | Au Optronics Corp. | Back light device and a liquid crystal display applying thereof |
| CN1510482A (en) * | 2002-12-24 | 2004-07-07 | 明基电通股份有限公司 | Direct downward background module |
| US20040183962A1 (en) * | 2003-03-19 | 2004-09-23 | Toppoly Optoelectronics Corp. | Backlight module and liquid crystal display formed therefrom |
| JP2004325959A (en) * | 2003-04-25 | 2004-11-18 | Matsushita Electric Works Ltd | Liquid crystal back light device |
| US20040228108A1 (en) * | 2002-11-13 | 2004-11-18 | Lee Jeong-Hwan | Reflector for back light assembly and back light assembly using the same |
| JP2004347684A (en) * | 2003-05-20 | 2004-12-09 | Toppoly Optoelectronics Corp | Improved combination for direct backlight constructed with fluorescent lamp |
| CN1580900A (en) * | 2003-08-14 | 2005-02-16 | 鸿富锦精密工业（深圳）有限公司 | Back light assembly |
-
2005
- 2005-10-28 CN CNB2005101008181A patent/CN100498454C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030156234A1 (en) * | 2002-02-19 | 2003-08-21 | Au Optronics Corp. | Back light device and a liquid crystal display applying thereof |
| US20040228108A1 (en) * | 2002-11-13 | 2004-11-18 | Lee Jeong-Hwan | Reflector for back light assembly and back light assembly using the same |
| CN1510482A (en) * | 2002-12-24 | 2004-07-07 | 明基电通股份有限公司 | Direct downward background module |
| US20040183962A1 (en) * | 2003-03-19 | 2004-09-23 | Toppoly Optoelectronics Corp. | Backlight module and liquid crystal display formed therefrom |
| JP2004325959A (en) * | 2003-04-25 | 2004-11-18 | Matsushita Electric Works Ltd | Liquid crystal back light device |
| JP2004347684A (en) * | 2003-05-20 | 2004-12-09 | Toppoly Optoelectronics Corp | Improved combination for direct backlight constructed with fluorescent lamp |
| CN1580900A (en) * | 2003-08-14 | 2005-02-16 | 鸿富锦精密工业（深圳）有限公司 | Back light assembly |
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|---|---|
| CN1955806A (en) | 2007-05-02 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20091130 |