CN107219585A - A kind of light guide plate and the backlight module using the light guide plate - Google Patents
A kind of light guide plate and the backlight module using the light guide plate Download PDFInfo
- Publication number
- CN107219585A CN107219585A CN201710238499.3A CN201710238499A CN107219585A CN 107219585 A CN107219585 A CN 107219585A CN 201710238499 A CN201710238499 A CN 201710238499A CN 107219585 A CN107219585 A CN 107219585A
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- Prior art keywords
- light
- circular arc
- guide plate
- light guide
- arc cylinder
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- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a kind of light guide plate and using the backlight module of the light guide plate, the light guide plate includes an at least incidence surface, an exiting surface orthogonal with the incidence surface；The X-axis bearing of trend of the incidence surface receives light source and provides light, light and exiting surface Y-axis bearing of trend parallel transmission, the exiting surface sets a plurality of circular arc cylinder in X-axis bearing of trend, wherein, set fluted between adjacent circular arc cylinder, circular arc cylinder is arranged on exiting surface along exiting surface Y-axis bearing of trend, guide light can in light guide plate parallel transmission, meanwhile, the spot light of circuit selecting lighting arranged in parallel is controlled in backlight module, different guide-lighting regions are formed；The beneficial effects of the invention are as follows：It is integrally formed using the light guide plate of micro-structural, it is uneven to be effectively reduced the light source mixed light caused that influences each other of light field between different backlights, and the optical quality of backlight module is lifted while multi-section display is ensured.
Description
Technical field
The present invention relates to backlight display field, more particularly to a kind of light guide plate and its backlight mould using the light guide plate
Group.
Background technology
Due in itself and light can not be produced to the liquid crystal display panel that is imaged in a liquid crystal display device, it is necessary to thoroughly
Backlight module is crossed to provide light source so that image is presented on display panel, and for known technology, can be by display panel
Dividing into multiple viewing areas and each viewing area has corresponding backlight, when different backlights are opened simultaneously,
Although the backlight corresponding to each viewing area provides the light source of different brightness, but because of the light between different backlights
Field-effect is influenceed, i.e., each viewing area may be disturbed by its corresponding backlight in adjacent display areas domain, and causes most Zhongdao
Intrinsic brilliance and the object brightness of non-primary that corresponding viewing area is shown so that the harmony of overall picture becomes
It is poor.Also therefore, for the problems of subregion dimming mode, another structure design is then developed in known technology
To improve above-mentioned missing, it is the known structural representation spliced with multizone light guide plate, is added between adjacent light guide plate
If light blocker unit, with the feelings for avoiding the light produced by backlight from being incident to neighbouring sub-viewing areas and interfering
Shape, in other words, that is, reaches the interactional purpose of light field between the different backlights of reduction.However, in multizone backlight mould
In block structure, although the light blocker unit between backlight can reduce the problem of part light field influences, actually because
Light have be casually arranged with or diffraction characteristic and can not highly desirable solve light field and influence each other, the mutually barrier list of viewing area
Bright line is also easy to produce between member, in addition in actual production, light blocker unit is needed and display panel has accurately contraposition can be only achieved
Good light barriering effect, so also adds difficulty during production.
Based on above-mentioned shortcoming, the present invention proposes a kind of light guide plate and its backlight module using the light guide plate, does not make
With the splicing of many light guide plates and in the case of light blocker unit, it is effectively reduced between different backlights that light field is interactional to ask
Topic.Light leak how is reduced while subregion lights luminous zone and the gap that allows audience to discover light guide plate is avoided, actually at present
One of important topic of backlight module.
The content of the invention
To overcome Partitioned light-guiding is caused in the prior art light source mixed light uneven and the problem of bright line, the present invention is provided
A kind of partition type light guide plate with higher display effect.
It is an object of the present invention to provide the backlight module of a kind of light guide plate and the use light guide plate, light guide plate and circle
Arc column body by integral forming, the uneven and multiple light guide plate of light source mixed light caused to improve Partitioned light-guiding splices produced
Bright line problem.
The light guide plate of the present invention includes an at least incidence surface, an exiting surface orthogonal with the incidence surface；The incidence surface is in X-axis
Bearing of trend receives light, light and exiting surface Y-axis bearing of trend parallel transmission, wherein, the exiting surface is in X-axis bearing of trend
Set and set fluted between a plurality of circular arc cylinder, adjacent circular arc cylinder, a plurality of circular arc cylinder extends along the exiting surface Y-axis
Direction and be arranged on light guide plate exiting surface, enable light parallel transmission in light guide plate.
Further, the size of the groove E is met：0<E<0.65R；Wherein, R is circular arc cylinder in the exiting surface shape
Into circular arc column radius, two adjoining circular arc cylinders between be uniformly distributed in respectively by specific spacing on the exiting surface.
Further, the circular arc cylinder radius R is met：H/10<R<H/5；Wherein, H is circular arc cylinder in exiting surface shape
Into light guide plate, two adjoining circular arc cylinders between be respectively uniformly distributed in the exiting surface by level altitude.
Further, the circular arc cylinder is semicylinder.
Further, the light guide plate is integrally formed with the circular arc cylinder, handles to reduce material by processing mode
Cost.
The backlight module that the present invention is provided, including：Backlight, light guide plate and control circuit：The backlight includes parallel
The plurality of points light source of setting；The light guide plate, including an at least incidence surface, an exiting surface orthogonal with the incidence surface；It is described enter
Smooth surface X-axis bearing of trend receive light, light in exiting surface Y-axis bearing of trend parallel transmission, wherein, the exiting surface X-axis
Bearing of trend sets and sets fluted between a plurality of circular arc cylinder, adjacent circular arc cylinder, and circular arc cylinder is along the exiting surface Y-axis
Bearing of trend and be arranged on light guide plate exiting surface, enable light parallel transmission in light guide plate；The control circuit may be selected
The spot light of arranged in parallel is lighted or closed, for controlling to transmit by specific direction on the light guide plate, first is formed guide-lighting
Region and the second guide-lighting region, can also control the brightness of other backlight subareas when current backlight subregion is lighted.
Further, the number ratio of the spot light collocation circular arc cylinder arrangement is between 1:1 to 1:5 scope.
Further, the point light source light-emitting face meets equation below with the circular arc cylinder spacing:
C=B/2tg(θ/2)
Wherein, B is the spacing between adjacent spot light, and θ is the incident angle of spot light formation.
Further, the size E of the groove E is met：0<E<0.65R;Wherein, R is the radius of circular arc cylinder.
Further, the circular arc cylinder radius R is met：
H/10<R<H/5;
Wherein, H is the light guide plate that circular arc cylinder is formed in incidence surface, and the circular arc cylinder of two adjoinings is uniformly divided by certain height
It is distributed in exiting surface.
The present invention arranges multiple micro-structural circular arc cylinders by the exiting surface in light guide plate by specific spacing and height, makes spot light
Light such as light emitting diode improves the direct of travel of light when passing through the surface of circular arc cylinder, and then changes inside light guide plate
Optical field distribution, improves the bright line problem that light source mixed light is uneven and light guide plate splicing is produced that Partitioned light-guiding is caused.
Brief description of the drawings
Fig. 1 shows the stereogram according to backlight module of the present invention.
Fig. 2 shows the plan of backlight module of the present invention.
Fig. 3 shows the sectional view of light guide plate of the present invention.
Fig. 4 shows the use state figure according to first embodiment of the invention.
Fig. 5 shows the use state figure according to second embodiment of the invention.
Fig. 6 shows the use state figure according to third embodiment of the invention.
Wherein, description of reference numerals is as follows：
The light guide plate of 10 backlight 20
The 30 control spot lights of circuit 30 101 first
103 second spot lights 105 thirdly light source
The subregion of 102 first subregion 104 second
The guide-lighting region of 106 the 3rd subregion 107 first
108 second guide-lighting region 201 incidence surfaces
The circular arc cylinder of 202 exiting surface 203
E recess R arc radius
H light guide plate θ spot light incident angles
Spacing between the adjacent spot lights of B
Distance between C backlights and circular arc cylinder.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
The present invention provides a kind of light guide plate 20, including an at least incidence surface 201, one exiting surface 202 orthogonal with the incidence surface 201；
Incidence surface 201 receives light, light and exiting surface 202Y axle bearing of trend parallel transmissions in X-axis bearing of trend, wherein, exiting surface
202 set fluted E, circular arc cylinder between a plurality of circular arc cylinder 203 of X-axis bearing of trend setting, adjacent circular arc cylinder 203
203 are arranged on light guide plate 20 along the Y-axis bearing of trend of exiting surface 202, enable light parallel transmission, form uniform face
Light source.
In addition, the top of light guide plate 20 may also include diffusion sheet, brightness enhancement film, combined optical film or its combination, visual demand
Adjustment.Multiple sites can be formed by working process such as sandblasting in the bottom of light guide plate 20 or micro-structural is formed, to increase leaded light
The light utilization of plate 20 and guide-lighting ability.When light by with rough surface circular arc cylinder 203 enter light guide plate 20 after,
The uneven phenomenon for causing bright blanking bar periodic distribution of the mixed light of backlight 10 can be improved.
The backlight module that the present invention is provided includes：Backlight 10, light guide plate 20 and control circuit 30（It is not shown）：Backlight
10 include parallel arrangement of plurality of points light source；It is orthogonal with the incidence surface 201 that light guide plate 20 includes an at least incidence surface 201, one
Exiting surface 202；Incidence surface 201 receives light source in X-axis bearing of trend and provides light, and light is in the Y-axis extension side of exiting surface 202
To parallel transmission, wherein, the X-axis bearing of trend of exiting surface 202 is set between a plurality of circular arc cylinder 203, adjacent circular arc cylinder 203
Fluted E is set, and circular arc cylinder 203 is arranged on exiting surface 202 along Y-axis bearing of trend.The control selectivity of circuit 30 light or
The spot light of arranged in parallel is closed, light parallel uniform transmission on light guide plate 20 forms the first guide-lighting region 107 and second and led
Light region 108, can also control the brightness of other backlight subareas when current backlight subregion is lighted.
Entered based on above-mentioned, of the invention light guide plate by the way that the spacing, height, backlight of strip adjacent circular arc cylinder can be changed
Firing angle degree etc., obtains required parallel surface distribution of light sources, is effectively reduced light field between different backlights and influences each other and causes
The problem of light source mixed light is uneven and stitching portion produces bright line.Several embodiments will be enumerated below, and with reference to schema pair
Detailed explanation is carried out in the present invention.
Figures 1 and 2 show that according to the present invention backlight module overall structure and floor map, refer to Fig. 1 and
Fig. 2, backlight 10 includes the first spot light 101, thirdly the second spot light 103, light source 105, and each spot light is according to position
Distribution is each main to provide each display subregion 10 in display unit, and the first spot light 101 is mainly used in providing first point
Light source needed for area 102, secondary light source is mainly used in providing the light source needed for the second subregion 104, and thirdly light source 105 is used to carry
For the light source 10 needed for the 3rd subregion 106, control circuit 30 lights the first spot light 101, thirdly the second spot light 103, light
Source 105 being lighted and closing, when lighting a spot light 101, the second spot light 103, when closing thirdly light source 105, light warp
Circular arc cylinder 203 forms the first guide-lighting region 107 after reflecting in Y-axis bearing of trend parallel expansion.In order to reach parallel face light
Source effect, backlight 10 according to different size the first spot light 101, the second spot light 103 or thirdly light source 105 formation enter
Angle, θ is penetrated, the spacing of circular arc cylinder 203 and backlight 10 need to be met such as minor function：C=B/2tg(θ/2)；Wherein, B is consecutive points
Spacing between light source, the number ratio of each spot light collocation circular arc cylinder arrangement is between 1:1 to 1:5 scope.
Fig. 3 shows the sectional view of light guide plate 20 of the present invention；It refer to figure, 3, circular arc cylinder 203 is distributed by specific spacing
In on the exiting surface 202, groove E size E is met between adjacent circular arc cylinder 206：0<E<0.65R；It may be noted that groove E
Using integrally formed mode.
Wherein, the radius R of circular arc cylinder 203 is met：H/10<R<H/5；H is the thickness of light guide plate 20, adjacent circular arc cylinder
Respectively it is distributed between 203 by level altitude on the exiting surface 202.This is to represent circular arc post in the way of partial enlargement
Body 203；In fact, the size of circular arc cylinder visually can not be recognized substantially up to micron order, more than to structure design it
Afterwards, the bright line that the light guide plate after being spliced into 20 occurs at groove E can be eliminated.
Fig. 4 shows the use state figure according to first embodiment of the invention；Due to traditional side entrance back module only
There is row's light source, so the quantity that subregion is carried out to it is very limited, the light guide plate 20 of the embodiment of the present invention passes through in exiting surface 202
The interval of groove E between circular arc cylinder 203, adjustment adjacent circular arc cylinder 203 is set, and control circuit 30 lights the first spot light
101 and second spot light 103, when closing thirdly light source 105, light reflected through circular arc cylinder 20,3 after exiting surface 202 Y
Axle bearing of trend parallel expansion, the first subregion 102 and the guide-lighting region 107 of the second subregion 104 formation first.
Fig. 5 shows the use state figure according to second embodiment of the invention, and control circuit 30 lights the second spot light
103, closing is with the first spot light 101 and thirdly during light source 105, and light is after the refraction of circular arc cylinder 203 in exiting surface 202
Y-axis bearing of trend parallel expansion, the guide-lighting region 107 of the second subregion 104 formation first.
Fig. 6 shows the use state figure according to third embodiment of the invention, and control circuit 30 lights the second spot light
103, closing is with the first spot light 101 and thirdly during light source 105, and light extends after 3206 refractions in the Y-axis of exiting surface 202
Direction parallel expansion, the guide-lighting region 107 of the first subregion 102 formation first, the guide-lighting region 108 of the 3rd subregion 106 formation second.
The Parameter adjustables such as spot light number, groove, arc radius, the light guide plate of the present invention, it is ensured that the side of light transmission
To and brightness, guiding light along Y-axis bearing of trend parallel expansion, reach the effect of subregion and uniform light extraction.
Although the present invention is disclosed above with embodiment, but it is not limited to the present invention, any to have the present invention
Person of ordinary skill in the field without departing from the spirit and scope of the present invention, and can when that can make various variations and modification
Consider various other embodiments, therefore protection scope of the present invention ought be defined depending on appended claims limited range.
Claims (10)
1. a kind of light guide plate, including an at least incidence surface, an exiting surface orthogonal with the incidence surface；The incidence surface extends in X-axis
Direction receives light, light in exiting surface Y-axis bearing of trend parallel transmission, wherein, the exiting surface X-axis bearing of trend sets many
Set fluted between bar circular arc cylinder, adjacent circular arc cylinder, circular arc cylinder is set along the exiting surface Y-axis bearing of trend
In light guide plate exiting surface, enable light parallel transmission in light guide plate, form the first guide-lighting region and the second guide-lighting region.
2. light guide plate according to claim 1, it is characterised in that：The groove E sizes are met：
0<E<0.65R
Wherein, R is the circular arc column radius that circular arc cylinder is formed in the exiting surface, between the circular arc cylinders of two adjoinings respectively by etc.
Spacing is uniformly distributed on the incidence surface.
3. light guide plate according to claim 1, it is characterised in that：The circular arc cylinder radius R is met：
H/10<R<H/5
Wherein, H is circular arc cylinder in the first side and the light guide plate of second side formation, the circular arc of two adjoinings
Respectively it is uniformly distributed between cylinder by certain height on the incidence surface.
4. light guide plate according to claim 1, it is characterised in that：The circular arc cylinder is semicylinder.
5. light guide plate according to claim 1, it is characterised in that：The circular arc cylinder is integrally formed, and passes through processing mode
Handle to reduce material cost.
6. a kind of backlight module, it is characterised in that including：One backlight, a light guide plate and a control circuit：
The backlight includes parallel arrangement of plurality of points light source；
The light guide plate, including an at least incidence surface, an exiting surface orthogonal with the incidence surface；The incidence surface is in X-axis extension side
To receiving light, light in exiting surface Y-axis bearing of trend parallel transmission, wherein, the exiting surface X-axis bearing of trend sets a plurality of
Set fluted between circular arc cylinder, adjacent circular arc cylinder, circular arc cylinder is arranged on along the exiting surface Y-axis bearing of trend
Light guide plate exiting surface, enables light parallel transmission in light guide plate；
The control circuit selecting lighting or the spot light for closing arranged in parallel, for controlling on the light guide plate by specific
Direction is transmitted, and is formed the described first guide-lighting region and the second guide-lighting region, also can be controlled other when current backlight subregion is lighted
The brightness of backlight subarea.
7. backlight module according to claim 6, the number ratio of the spot light collocation circular arc cylinder arrangement is between 1:1
To 1:5 scope.
8. backlight module according to claim 7, it is characterised in that：Between the point light source light-emitting face and the circular arc cylinder
Away from meeting equation below:
C=B/2tg(θ/2)
Wherein, B is the spacing between adjacent spot light, and θ is the incident angle of spot light formation.
9. backlight module according to claim 6, it is characterised in that：The size E of the groove E is met：0<E<0.65R;
Wherein, R is the circular arc column radius that circular arc cylinder is formed in the exiting surface.
10. the backlight module according to claim 9, it is characterised in that：The circular arc cylinder radius R is met：
H/10<R<H/5;
Wherein, H is the light guide plate that circular arc cylinder is formed in incidence surface, and the circular arc cylinder of two adjoinings is uniformly divided by certain height
It is distributed in exiting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710238499.3A CN107219585A (en) | 2017-04-13 | 2017-04-13 | A kind of light guide plate and the backlight module using the light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710238499.3A CN107219585A (en) | 2017-04-13 | 2017-04-13 | A kind of light guide plate and the backlight module using the light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107219585A true CN107219585A (en) | 2017-09-29 |
Family
ID=59927523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710238499.3A Pending CN107219585A (en) | 2017-04-13 | 2017-04-13 | A kind of light guide plate and the backlight module using the light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107219585A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329423A (en) * | 2007-06-21 | 2008-12-24 | 胜华科技股份有限公司 | Light guide plate and backlight module |
| JP2011175965A (en) * | 2010-02-01 | 2011-09-08 | Minebea Co Ltd | Planar lighting device |
| US20120113680A1 (en) * | 2010-11-05 | 2012-05-10 | Kabushiki Kaisha Toshiba | Light guide body and surface light source |
| US20140355300A1 (en) * | 2012-03-16 | 2014-12-04 | Radiant Opto-Electronics Corporation | Light guide plate and light source module |
| CN104570195A (en) * | 2014-12-31 | 2015-04-29 | 深圳市华星光电技术有限公司 | Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device |
| CN207114820U (en) * | 2017-04-13 | 2018-03-16 | 芜湖德仓光电有限公司 | A kind of backlight module |
-
2017
- 2017-04-13 CN CN201710238499.3A patent/CN107219585A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329423A (en) * | 2007-06-21 | 2008-12-24 | 胜华科技股份有限公司 | Light guide plate and backlight module |
| JP2011175965A (en) * | 2010-02-01 | 2011-09-08 | Minebea Co Ltd | Planar lighting device |
| US20120113680A1 (en) * | 2010-11-05 | 2012-05-10 | Kabushiki Kaisha Toshiba | Light guide body and surface light source |
| US20140355300A1 (en) * | 2012-03-16 | 2014-12-04 | Radiant Opto-Electronics Corporation | Light guide plate and light source module |
| CN104570195A (en) * | 2014-12-31 | 2015-04-29 | 深圳市华星光电技术有限公司 | Light guide plate, liquid crystal displayer backlight module and light guide plate manufacturing device |
| CN207114820U (en) * | 2017-04-13 | 2018-03-16 | 芜湖德仓光电有限公司 | A kind of backlight module |
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Application publication date: 20170929 |
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