CN104880762B - Light guide plate and backlight module - Google Patents
Light guide plate and backlight module Download PDFInfo
- Publication number
- CN104880762B CN104880762B CN201510311755.8A CN201510311755A CN104880762B CN 104880762 B CN104880762 B CN 104880762B CN 201510311755 A CN201510311755 A CN 201510311755A CN 104880762 B CN104880762 B CN 104880762B
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- China
- Prior art keywords
- light
- section
- guide plate
- light guide
- groove
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
Abstract
The present invention discloses a kind of light guide plate, including incidence surface, distance light face, light-emitting surface and reflecting surface, the light-emitting surface and the reflecting surface are opposite and are respectively formed the top and bottom of the light guide plate, the incidence surface and the distance light face are relatively arranged on the side of the light guide plate, the reflecting surface is equipped with multiple grooves being intervally installed, the light guide plate includes the first section, first section is parallel to the incidence surface and the distance light face, and first section is perpendicular to the light-emitting surface, cross sectional shape of the groove on first section is polygon, on from the incidence surface to the extending direction in the distance light face, section of the groove on first section is in the Long-term change trend uniformly amplified.Invention additionally discloses a kind of backlight modules.The light conducting plate structure is simple, and light guide effect is good, is conducive to improve the brightness of backlight module.
Description
Technical field
The present invention relates to the back light source technique field of liquid crystal display more particularly to a kind of light guide plates and backlight module.
Background technology
The liquid crystal display product for being configured with backlight at present is widely used to each display field, for handheld device
Speech, LED backlight liquid crystal display have captured most of market with its high life low-power consumption and good display effect.But
Handheld device is equipped with fixed power source, and most of special circumstances used outdoors because of it, it is desirable that LED backlight liquid crystal display
Utensil has more high brightness and more low-power consumption.Although the quantity for increasing LED light can improve the brightness of backlight, increase uniformity,
But the cost of backlight will certainly be increased, and the quantity due to increasing LED light, be externally supplied electric current and be added in, module fever
The performance indicators such as the effect of amount steeply rises, and system temperature is caused drastically to increase, LED light, service life are disliked with the raising of temperature
Change so that brightness declines, color-coordinate shift.Therefore guide-lighting as the important component that point light source is become to area source in LED backlight
Plate, it is necessary to breakthrough is made in terms of improving light utilization, reducing fiber-loss, to meet the market demand.
Existing light guide plate is equipped with dot surface, the site of curved surfaces is arranged on dot surface, site belongs to micron-sized knot
Structure need to be gone out with laser, and entire light guide plate mesh point distribution needs particular topology to design, to ensure the uniformity of emergent light,
Such as site is more and more intensive far from light source and site diameter is increasing, this just further increases the difficulty of site processing,
So that light conducting plate structure is complicated, it is of high cost.And when light is mapped to each site, diffusing reflection is carried out to light by site, is led to
Various densitys, site not of uniform size are crossed, light guide plate uniformly light-emitting can be made.But site can absorb part during irreflexive
Light, the light of reflection will be lossy, therefore, the inevitable fiber-loss of light conducting plate structure in the prior art, because of light
Loss cause backlight module brightness decline.
Invention content
A kind of light guide plate of present invention offer and backlight module, the light conducting plate structure is simple, and light guide effect is good, is conducive to carry
The brightness of high backlight module.
To achieve the goals above, embodiment of the present invention provides the following technical solutions：
On the one hand, the present invention provides a kind of light guide plate, including incidence surface, distance light face, light-emitting surface and reflecting surface, the light extraction
Face and the reflecting surface are opposite and are respectively formed the top and bottom of the light guide plate, and the incidence surface and the distance light face are opposite
It is set to the side of the light guide plate, the reflecting surface is equipped with multiple grooves being intervally installed, and the light guide plate includes the
One section, first section is parallel to the incidence surface and the distance light face, and first section is perpendicular to the light extraction
Face, cross sectional shape of the groove on first section is polygon, from the incidence surface to the extension in the distance light face
On direction, section of the groove on first section is in the Long-term change trend uniformly amplified.
Wherein, the light guide plate further includes the second section, and second section is perpendicular to the incidence surface, the distance light face
With the light-emitting surface, cross sectional shape of the groove on second section is trapezoidal.
Wherein, the interval between the multiple groove is uniform.
Wherein, the first side wall and second sidewall are set in the groove, the first side wall and the second sidewall are with described
Second face centered on section is symmetrical arranged.
Wherein, cross sectional shape of the groove on first section is triangle or trapezoidal.
Wherein, the inner wall of the groove is coated with reflectance coating.
Wherein, the light guide plate further includes multiple sites, and the network point distribution is between the multiple groove.
On the other hand, the present invention also provides a kind of backlight module, including light guide plate and light source, the light guide plate includes into light
Face, distance light face, light-emitting surface and reflecting surface, the light-emitting surface and the reflecting surface are opposite and are respectively formed the top of the light guide plate
And bottom, the incidence surface and the distance light face are relatively arranged on the side of the light guide plate, the light source close to it is described enter light
Face is arranged, and the reflecting surface is equipped with multiple grooves being intervally installed, and the light guide plate includes the first section, and described first cuts
Face is parallel to the incidence surface and the distance light face, and first section, perpendicular to the light-emitting surface, the groove is described
Cross sectional shape on first section is polygon, from the incidence surface to the extending direction in the distance light face on, the groove exists
Section on first section is in the Long-term change trend uniformly amplified.
Wherein, each groove is respectively formed on the first opening in the incidence surface, the light source and is distributed in described the
Incidence surface between one opening is oppositely arranged.
Wherein, the light guide plate further includes the second section, and second section is perpendicular to the incidence surface, the distance light face
With the light-emitting surface, cross sectional shape of the groove on second section is trapezoidal.
Wherein, the interval between the multiple groove is uniform.
Wherein, the first side wall and second sidewall are set in the groove, the first side wall and the second sidewall are with described
Second face centered on section is symmetrical arranged.
Wherein, cross sectional shape of the groove on first section is triangle or trapezoidal.
Wherein, the inner wall of the groove is coated with reflectance coating.
Wherein, the light guide plate further includes multiple sites, and the network point distribution is between the multiple groove.
Light guide plate and backlight module provided by the invention, by the way that groove is arranged on light guide plate reflecting surface, by will be described
Cross sectional shape of the groove on first section is designed as polygon, from the incidence surface to the extending direction in the distance light face
On, section of the groove on first section is in the Long-term change trend uniformly amplified.Such reflecting surface can make light
Total reflection, and then light utilization is improved, and as light enters in light guide plate, when light is got on the inner wall of groove, due to
Section of the groove on first section is in the Long-term change trend uniformly amplified, mistake of the light from incidence surface directive distance light face
Cheng Zhong will certainly be mapped on the inner wall of groove, and the inner wall of groove extends in inclined-plane, so as to reflect more light upwards
Light guide plate, therefore, the present invention are conducive to improve the brightness of backlight module.And groove structure is easily worked, and is cut using cutter
Light guide plate forms groove, it is only necessary to adjust the speed of x and the directions y when cutter advances, and this speed is uniform, therefore guide-lighting
Harden structure is simple, easy to process, and processing cost is low.
Description of the drawings
In order to illustrate more clearly of technical scheme of the present invention, attached drawing needed in embodiment will be made below
Simply introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, general for this field
For logical technical staff, without creative efforts, other attached drawings can also be obtained such as these attached drawings.
Fig. 1 is the stereoscopic schematic diagram for the light guide plate that one embodiment of the present invention provides.
Fig. 2 is the enlarged schematic partial view for the light guide plate that the first embodiment of the invention provides.
Fig. 3 is one of light guide plate shown in Fig. 2 lateral plan.
Fig. 4 is another lateral plan of light guide plate shown in Fig. 2.
Fig. 5 is the vertical view of light guide plate shown in Fig. 2.
Fig. 6 is the enlarged schematic partial view for the light guide plate that second of embodiment of the invention provides.
Fig. 7 is one of light guide plate shown in fig. 6 lateral plan.
Fig. 8 is another lateral plan of light guide plate shown in fig. 6.
Fig. 9 is the vertical view of light guide plate shown in fig. 6.
Specific implementation mode
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu is fully described by.
Referring to Fig. 1, the present invention provides a kind of light guide plate 10, light guide plate 10 includes incidence surface 12, distance light face 14, light-emitting surface
16 and reflecting surface 18, the light-emitting surface 16 and the reflecting surface 18 are opposite and be respectively formed the top and bottom of the light guide plate 10
Portion, the incidence surface 12 and the distance light face 14 are relatively arranged on the side of the light guide plate 10.The reflecting surface 18 is equipped with more
A groove 19 being intervally installed.
Fig. 2 to Fig. 9 is please referred to, describes the specific structure of groove 19 for convenience, it is mutual using two of light guide plate 10
It is further illustrated with the first vertical section T1 and the second section T2.As shown in Figure 3 and Figure 7, the first section T1 is parallel to described
Incidence surface 12 and the distance light face 14, and the first section T1, perpendicular to the light-emitting surface 16, the groove 19 is described
Cross sectional shape on one section T1 is polygon.It is described recessed on from the incidence surface 12 to the extending direction in the distance light face 14
Section of the slot 19 on the first section T1 is in the Long-term change trend uniformly amplified.The second section T2 perpendicular to it is described enter light
Face 12, the distance light face 14 and the light-emitting surface 16, as shown in Figure 4 and Figure 8, the groove 19 is on the second section T2
Cross sectional shape be it is trapezoidal, it is described it is trapezoidal be right-angled trapezium.Fig. 5 and Fig. 9 are please referred to, the light guide plate 10, the groove 19 are overlooked
Shape be isosceles trapezoidal structure, 12 side of incidence surface be isosceles trapezoidal structure short side, 14 side of distance light face be isosceles trapezoid
The long side of structure.
Groove 19 can also be utilized and swash by carrying out cutting on reflecting surface 18, can be cut with cutter
Light cuts the groove 19.Either cutter is still cut by laser, it is only necessary to control cutter or laser from incidence surface 12 to distance light
The direction in face 14 is advanced, and (directions x and y refer to cutter same plane to the speed in x and the directions y when controlling cutter or laser advance
The direction of interior advance and direction perpendicular to advance, form two-dimensional cut surface), it is equal to control the speed that cutter or laser advance
Even, therefore light guide plate 10 is simple in structure, easy to process, processing cost is low.
Interval between the multiple groove 19 is uniform, on incidence surface 12, the part incidence surface between groove 19
12 are oppositely arranged with light source, and such light source is arranged at intervals on the side of the incidence surface 12 of light guide plate 10.
Specifically, please refer to Fig. 3 and Fig. 7, the first side wall 192 and second sidewall 194 are set in the groove 19, described
One side wall 192 and the second sidewall 194 face centered on the second section T2 are symmetrical arranged, and groove 19 is with a center
Face symmetrical structure, this median plane namely a second section T2, the second section T2 of the present invention do not limit its tool
The position of body only limits it perpendicular to the incidence surface 12, the distance light face 14 and the light-emitting surface 16.
Cross sectional shape of the groove 19 on the first section T1 is triangle or trapezoidal, equally, of the present invention
The first section T1 also do not limited by specific location, only limit a first section T1 be parallel to the incidence surface 12 and the distance light
Face 14, and the first section T1 is perpendicular to the light-emitting surface 16.At different positions, groove 19 is on the first section T1
The shape size in section is different, from incidence surface 12 to the extending direction in distance light face 14 on, the cutting on the first section T1 of groove 19
The size in face becomes larger.
In embodiment shown in Fig. 2 to Fig. 5, cross sectional shape of the groove 19 on the first section T1 is triangle
Structure.In Fig. 6 to embodiment shown in Fig. 9, cross sectional shape of the groove 19 on the first section T1 is trapezium structure.
Referring to Fig. 3,19 structure alphabet of groove is gone out, X is that 12 side groove of incidence surface, 19 bottoms are long, and Y is distance light
Face 14 side groove, 19 bottoms are long, and h is the height of 12 side groove 19 of incidence surface, and H is the height of 14 side groove 19 of distance light face, and P is
Spacing between two adjacent grooves 19.When design, it X, Y, h, H, P these parameters changed by emulation can reach adjustment and lead
The leaded light of tabula rasa 10 and the effect of light extraction.
The inner wall of the groove 19 is coated with reflectance coating, when light conducts in light guide plate 10 and beats to 19 inner wall of groove
When, light is reflected, and is continued in 10 internal transmission of light guide plate so that most of light is exported by light-emitting surface 16.
Furthermore, the light guide plate 10 further includes multiple sites (not shown), and the network point distribution is in the multiple
Between groove 19, being provided with conducive to reflecting effect is improved for site reinforces reflection of the light in light guide plate 10 so that light is equal
Even output improves the equal light effect of light guide plate 10.
On the other hand, the present invention also provides a kind of backlight module, including light guide plate 10 and light source (not shown), the light sources
It is arranged close to the incidence surface 12.Each groove 19 is respectively formed on the first opening in the incidence surface 12, the light source with
The incidence surface 12 being distributed between first opening is oppositely arranged.
Light guide plate 10 and backlight module provided by the invention are led to by the way that groove 19 is arranged on 10 reflecting surface 18 of light guide plate
It crosses and cross sectional shape of the groove 19 on the first section T1 is designed as polygon, from the incidence surface 12 to described remote
On the extending direction of smooth surface 14, section of the groove 19 on the first section T1 is in the Long-term change trend uniformly amplified.This
The reflecting surface 18 of sample can be such that light is totally reflected, and then improve light utilization, and as light enters in light guide plate 10, light
When getting on the inner wall of groove 19, since section of the groove 19 on the first section T1 is in that the trend uniformly amplified becomes
Change, light will certainly be mapped on the inner wall of groove 19 during the 12 directive distance light face 14 of incidence surface, and the inner wall of groove 19
Extend in inclined-plane, so as to which more light are reflected light guide plate 10 upwards, therefore, the present invention is conducive to improve backlight module
Brightness.And 19 structure of groove is easily worked, and forms groove 19 using cutter cutting light guide plate 10, it is only necessary to adjust cutter advance
When x and the directions y speed, and this speed is uniform, therefore light guide plate 10 is simple in structure, and easy to process, processing cost is low.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. a kind of light guide plate, including incidence surface, distance light face, light-emitting surface and reflecting surface, the light-emitting surface and the reflecting surface are opposite
And the top and bottom of the light guide plate are respectively formed, the incidence surface and the distance light face are relatively arranged on the light guide plate
Side, which is characterized in that the reflecting surface is equipped with multiple grooves being intervally installed, and the light guide plate includes the first section,
First section is parallel to the incidence surface and the distance light face, and first section is perpendicular to the light-emitting surface, described
Cross sectional shape of the groove on first section be polygon, from the incidence surface to the extending direction in the distance light face on,
Section of the groove on first section is in the Long-term change trend uniformly amplified, and the inner wall of the groove is coated with reflection and applies
Layer.
2. light guide plate as described in claim 1, which is characterized in that the light guide plate further includes the second section, and described second cuts
Face is perpendicular to the incidence surface, the distance light face and the light-emitting surface, cross sectional shape of the groove on second section
It is trapezoidal.
3. light guide plate as claimed in claim 2, which is characterized in that the interval between the multiple groove is uniform.
4. light guide plate as claimed in claim 2, which is characterized in that the first side wall and second sidewall are set in the groove, it is described
Face is symmetrical arranged centered on the first side wall and the second sidewall, and the median plane is second section.
5. light guide plate as claimed in claim 4, which is characterized in that cross sectional shape of the groove on first section be
Triangle is trapezoidal.
6. light guide plate as described in claim 1, which is characterized in that the light guide plate further includes multiple sites, the site point
It is distributed between the multiple groove.
7. a kind of backlight module, including light guide plate and light source, the light guide plate includes incidence surface, distance light face, light-emitting surface and reflection
Face, the light-emitting surface and the reflecting surface are opposite and are respectively formed the top and bottom of the light guide plate, the incidence surface and institute
The side that distance light face is relatively arranged on the light guide plate is stated, the light source is arranged close to the incidence surface, which is characterized in that described
Reflecting surface is equipped with multiple grooves being intervally installed, and the light guide plate includes the first section, and first section is parallel to institute
Incidence surface and the distance light face are stated, and first section, perpendicular to the light-emitting surface, the groove is on first section
Cross sectional shape be polygon, from the incidence surface to the extending direction in the distance light face on, the groove is cut described first
Section on face is in the Long-term change trend uniformly amplified, and the inner wall of the groove is coated with reflectance coating.
8. backlight module as claimed in claim 7, which is characterized in that each groove is respectively formed on the in the incidence surface
One opening, the light source and the incidence surface being distributed between first opening are oppositely arranged.
9. backlight module as claimed in claim 8, which is characterized in that the light guide plate further includes the second section, and described second
Section is perpendicular to the incidence surface, the distance light face and the light-emitting surface, section shape of the groove on second section
Shape is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311755.8A CN104880762B (en) | 2015-06-09 | 2015-06-09 | Light guide plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311755.8A CN104880762B (en) | 2015-06-09 | 2015-06-09 | Light guide plate and backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104880762A CN104880762A (en) | 2015-09-02 |
| CN104880762B true CN104880762B (en) | 2018-11-06 |
Family
ID=53948326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510311755.8A Active CN104880762B (en) | 2015-06-09 | 2015-06-09 | Light guide plate and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104880762B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114217374B (en) * | 2021-09-30 | 2022-10-18 | 东莞市元立电子科技有限公司 | Light guide plate for improving brightness |
| CN114879408B (en) * | 2022-05-25 | 2023-05-02 | 厦门天马微电子有限公司 | Backlight module and display module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609682A (en) * | 2003-10-23 | 2005-04-27 | 鸿富锦精密工业（深圳）有限公司 | Area illuminating apparatus and light conducting plate thereof |
| CN201083843Y (en) * | 2007-06-26 | 2008-07-09 | 台湾奈普光电科技股份有限公司 | Light guide board and backlight module |
| JP2009176593A (en) * | 2008-01-25 | 2009-08-06 | Seiko Instruments Inc | Lighting device and display device using the same |
| CN102486275A (en) * | 2010-12-06 | 2012-06-06 | 奇美电子股份有限公司 | Backlight module and liquid crystal display device |
| CN103399371A (en) * | 2013-08-07 | 2013-11-20 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display device |
| CN203980009U (en) * | 2014-06-30 | 2014-12-03 | 东莞市亚星半导体有限公司 | A kind of backlight module and LCDs thereof |
-
2015
- 2015-06-09 CN CN201510311755.8A patent/CN104880762B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609682A (en) * | 2003-10-23 | 2005-04-27 | 鸿富锦精密工业（深圳）有限公司 | Area illuminating apparatus and light conducting plate thereof |
| CN201083843Y (en) * | 2007-06-26 | 2008-07-09 | 台湾奈普光电科技股份有限公司 | Light guide board and backlight module |
| JP2009176593A (en) * | 2008-01-25 | 2009-08-06 | Seiko Instruments Inc | Lighting device and display device using the same |
| CN102486275A (en) * | 2010-12-06 | 2012-06-06 | 奇美电子股份有限公司 | Backlight module and liquid crystal display device |
| CN103399371A (en) * | 2013-08-07 | 2013-11-20 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display device |
| CN203980009U (en) * | 2014-06-30 | 2014-12-03 | 东莞市亚星半导体有限公司 | A kind of backlight module and LCDs thereof |
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| Publication number | Publication date |
|---|---|
| CN104880762A (en) | 2015-09-02 |
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