CN106353849A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN106353849A CN106353849A CN201510416948.XA CN201510416948A CN106353849A CN 106353849 A CN106353849 A CN 106353849A CN 201510416948 A CN201510416948 A CN 201510416948A CN 106353849 A CN106353849 A CN 106353849A
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- Prior art keywords
- light
- angle
- guide plate
- inclination
- substrate
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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
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight module and a display device; the backlight module comprises a light guide plate and a light-emitting unit; the light guide plate has at least one incident side and an emergent side connected with the incident side; the light-emitting unit has a substrate, at least one light-emitting device and a light exiting side, the light-emitting devices are disposed on the substrate, and light source is provided for the light-emitting devices by the light exiting side and enters the light guide plate from the incident side out of the light exiting side, wherein the incident side has a first inclination angle to a direction perpendicular to the light exiting side, the light exiting side has a second inclination angle to the direction, and the first inclination angle and the second inclination angle are identical in nature.
Description
Technical field
The present invention relates to a kind of backlight module and display device.
Background technology
Display medium itself due to display panels will not light, in order to reach display effect it is necessary to
One enough briliancy is provided and the area source (i.e. backlight module) that is evenly distributed is to display panels, with
Picture needed for display.Further, since light emitting diode (light emitting diode, led) is in technique
Continuous improvement with material aspect is so that the luminous efficiency of light emitting diode is substantially improved.Due to luminous two
Pole pipe has that low power consumption, long service life, safe, emission response time be short and the spy such as small volume
Property, therefore also little by little apply in the backlight module of display device.
Refer to shown in Fig. 1, it is a kind of known schematic diagram of display device 1.
Display device 1 comprises display floater 11 and backlight module 12, backlight module 12 and display floater
11 set relatively, and can provide light source incidence to display floater 11, make display floater 11 capable of displaying image.
Wherein, backlight module 12 includes LED light source 121, light guide plate 122 and at least one blooming piece 123.
LED light source 121 can provide light source incidence to light guide plate 122, and the effect of light guide plate 122 is to guide
The direction of light, and pass through total reflection within light guide plate 122 for the light, make light by light guide plate 122
Exiting surface o project, to form uniform area source.In addition, blooming piece 123 (here it is shown that 4
As a example piece blooming piece) can for example comprise diffusion sheet, and may be disposed at the exiting surface o of light guide plate 122,
So that the light projecting light guide plate 122 can form an area source evenly after diffusion sheet.
However, in known technology, as shown in figure 1, because light guide plate 122 is generally light transmissive material system
Become, therefore, light is incident to after light guide plate 122 by incidence surface i and will be directed to inside light guide plate 122, makes
(the region a) of such as Fig. 1 often can leak to obtain light guide plate 122 region adjacent with LED light source 121
Optical phenomenon, makes display floater 11 produce bright spot (hot spot), causes display quality not good and make product
Competitiveness declines.
Therefore, for compared to known technology, a kind of backlight module and display device how are provided to improve
Light leak improves display quality, always one of important topic of industry with avoiding bright spot.
Content of the invention
In view of above-mentioned problem, the present invention provides a kind of backlight mould improving light leak and avoiding bright spot and occur
Block and display device.
For reaching above-mentioned purpose, the present invention provides a kind of backlight module, including light guide plate and luminescence unit.
Light guide plate has at least one incidence surface and the exiting surface being connected with incidence surface.Luminescence unit have substrate,
At least one luminescent device and light emergence face, luminescent device is arranged on substrate, and luminescent device is projected by light
Face provides light source, and is incident to light guide plate by incidence surface, and is projected by exiting surface；Wherein, incidence surface with
The direction of vertical exiting surface forms the first angle of inclination, and light emergence face forms the second angle of inclination with direction,
First angle of inclination is identical with the second angle of inclination.
For reaching above-mentioned purpose, the present invention also provides a kind of display device, including display floater and backlight mould
Block.Backlight module is relative with display floater and set, and comprise light guide plate and luminescence unit, light guide plate has
Have at least one incidence surface and the exiting surface being connected with incidence surface, luminescence unit have substrate, at least one
Luminescent device and light emergence face, luminescent device is arranged on substrate, and luminescent device provides light by light emergence face
Source, and light guide plate is incident to by incidence surface, and projected by exiting surface；Wherein, incidence surface with vertical go out light
Direction formation first angle of inclination in face, light emergence face and described direction formation the second angle of inclination, first
Angle of inclination is identical with the second angle of inclination.
In one embodiment, the first angle of inclination or the second angle of inclination are between 2 degree to 30 degree.
In one embodiment, light emergence face is contacted with incidence surface.
In one embodiment, luminescence unit has more a catoptric arrangement, and catoptric arrangement has kink,
And light emergence face is the opening of catoptric arrangement.
In one embodiment, display device further includes glue frame, and it is adjacent to light guide plate, and has setting
Face sets substrate.
In one embodiment, glue frame has loading end and is installed with display floater.
From the above, in the backlight module of the present invention and display device, luminescence unit has light emergence face,
And luminescent device provides light source by light emergence face, and light guide plate is incident to by incidence surface, and is penetrated by exiting surface
Go out.In addition, the direction of incidence surface and vertical exiting surface forms the first angle of inclination, light emergence face with described
Direction forms the second angle of inclination, and the first angle of inclination is identical with the second angle of inclination.The present invention passes through
The first angle of inclination that incidence surface and described direction are formed and light emergence face and described direction is formed second incline
Rake angle is identical, can lift the coupling effect between luminescence unit and light element, to reduce display dress
The generation put light leak and avoid bright spot.
Brief description
Fig. 1 is a kind of known schematic diagram of display device.
Fig. 2 a is a kind of schematic diagram of display device of the preferred embodiment of the present invention.
Fig. 2 b is the close-up schematic view of Fig. 2 a.
Specific embodiment
Hereinafter with reference to relevant drawings, the backlight module according to the preferred embodiment of the present invention and display dress are described
Put, wherein identical device will be illustrated with identical reference.
Refer to shown in Fig. 2 a and Fig. 2 b, wherein, Fig. 2 a is that one kind of the preferred embodiment of the present invention shows
The schematic diagram of showing device 2, and Fig. 2 b is the close-up schematic view of Fig. 2 a.Show in the present embodiment
First direction x (horizontal direction), second direction y and third direction z (vertical direction), first party
Substantially it is mutually perpendicular to two-by-two to x, second direction y and third direction z.Wherein, first direction x is real
Can be parallel with the bearing of trend of the scan line of display device 2 in matter, second direction y substantially can be with data
The bearing of trend of line is parallel, and third direction z substantially can be respectively vertical first direction x and second party
Other direction to y.
As shown in Figure 2 a, display device 2 is liquid crystal indicator, and includes display floater 21 and the back of the body
Optical module 22.Backlight module 22 is relative with display floater 21 and set, and can provide light source incidence to show
Panel 21, makes display floater 21 capable of displaying image.
Display floater 21 includes the first substrate 211, the second substrate 212 and display dielectric layer (figure does not show).
Display dielectric layer is interposed between the first substrate 211 and the second substrate 212.Wherein, the first substrate 211
And second substrate 212 be made up of light-transmitting materials, for example, glass substrate, quartz substrate, Sapphire Substrate
Or plastic, or a combination thereof, do not limit.In the present embodiment, the first substrate 211 is with thin film
Transistor substrate, and the second substrate 212 is taking colorized optical filtering substrate as a example.But in other embodiments
In, the black-matrix layer (black matrix) on colorized optical filtering substrate and filter layer (color filter) also may be used
It is respectively provided with a thin film transistor substrate so that the first substrate 211 becomes boa (black matrix on
Array) substrate, or become coa (color filter on array) substrate, do not limit.
The display floater 21 of the present embodiment more can comprise two Polarizers 213,214, Polarizer 213 (under
Polarizer) it is arranged at the side away from the second substrate 212 for first substrate 211, and Polarizer 214 is (upper inclined
Tabula rasa) it is arranged at the side away from the first substrate 211 for second substrate 212.Here, Polarizer 213 pastes
It is combined in the downside surface of the first substrate 211, and Polarizer 214 is fitted in the upside table of the second substrate 212
Face.Substantially differ 90 degree of Polarizer 213,214 by two panels polarizing axis, you can reach masking backlight
The function in source, recycles the power controlling electric field can produce deflection with the characteristic of modulation light to display medium,
Reach and allow the purpose of display floater 21 show image.
In addition, backlight module 22 comprises light guide plate 221, glue frame 222 and luminescence unit 223.This reality
The backlight module 22 applying example further includes at least one blooming piece and reflection device 228.
Light guide plate 221 has at least one incidence surface i and exiting surface o being connected with incidence surface i.Wherein,
The effect of light guide plate 221 is the direction of direct light line, and complete within light guide plate 221 by light
Reflection, makes light be projected by the exiting surface o of light guide plate 221, to form uniform area source.Light guide plate
221 are made up of light transmissive material, and light transmissive material can be for example acrylic resin, Merlon, poly- second
Olefine resin or glass, are not any limitation as.In addition, the section shape of light guide plate 221 may be, for example, flat board
Shape or wedge shape, but not limited to this.The present embodiment is taking flat light guide plate 221 as a example, and past first
Direction x extends.
Glue frame 222 is adjacent to light guide plate 221, and has setting face 2221 and loading end 2222, setting face
2221 are installed with luminescence unit 223, and loading end 2222 is installed with display floater 21, to hold through glue frame 222
Carry display floater 21 and relative with backlight module 22 and set.
Luminescence unit 223 is arranged at setting face 2221, and can provide light source by the incidence surface of light guide plate 221
I is incident to light guide plate 221, and is projected by its exiting surface o.Wherein, luminescence unit 223 has at least one
Individual luminescent device 2231, substrate 2232 and light emergence face 2233.Luminescent device 2231 is arranged on substrate 2232
On, and substrate 2232 is arranged on that in the setting face 2221 of glue frame 222, (i.e. setting face 2221 is installed with substrate
2232).Here, substrate 2232 can such as but not limited to pass through adhesion layer (figure do not show) and being fitted in and set
Put on face 2221.Substrate 2232 can combine substrate for flexible substrate, rigid substrate or soft or hard, does not limit
Fixed.
Luminescent device 2231 projects light via light emergence face 2233, and is incident to light guide plate by incidence surface i
221, and projected by exiting surface o.Here, light emergence face 2233 is light leaves luminescence unit 223
Surface, and light emergence face 2233 is accessible with incidence surface i or does not contact.The light emergence face 2233 of the present embodiment
It is with incidence surface i taking substantial contact as a example.But, in various embodiments, light emergence face 2233
With incidence surface i also can relative and set but substantially not in contact with.
The luminescent device 2232 of the present embodiment may be, for example, LED crystal particle (die), for example but does not limit
In being arranged on substrate 2232 with surface mount technology (surface mount technology, smt).Separately
Outward, the luminescence unit 223 of the present embodiment is to have the light-emitting diodes of at least one LED crystal particle
As a example pipe Rhizoma Dioscoreae (peeled) (lightbar), and it is arranged at the side of light guide plate 221.But, in different enforcement
In example, also luminescence unit (figure does not show) can be separately set in the incidence surface i of light guide plate 221 relative side,
So that two luminescence units can inject light to light guide plate 221 by the incidence surface i of opposite sides respectively, not
Limit.
In addition, in addition to luminescent device 2231 with substrate 2232, the luminescence unit 223 of the present embodiment
With more catoptric arrangement 2234 and adhesive body 2235.Catoptric arrangement 2234 is such as, but not limited to reflector
Or reflector, and its inner surface can have the reflecting material of high reflectance in order to reflection light.Wherein,
Reflecting material for example can comprise metal, metal-oxide, high reflection paint (white paint), reflective membrane or a combination thereof,
Do not limit.
The catoptric arrangement 2234 of the present embodiment has kink t, and light emergence face 2233 is catoptric arrangement
2234 opening.In addition, adhesive body 2235 is arranged in catoptric arrangement 2234 covers luminescent device 2231,
Luminescent device 2231 is thereby protected to pollute from dust or aqueous vapor or foreign body etc. and affect its characteristics of luminescence.
The present embodiment, by having the catoptric arrangement 2234 of kink t, can make the light that luminescent device 2231 is sent
Line is reflected by its inner surface, and is projected by light emergence face 2233, and is incident to light guide plate by incidence surface i
221, and projected by exiting surface o, to provide light source incidence to display floater 21, make the display floater 21 can
Show image.
In addition, as shown in Figure 2 b, the direction of the incidence surface i of light guide plate 221 and vertical exiting surface o is (i.e.
Form the first tilt angle theta 1 (acute angle) between third direction z), and the light emergence face of luminescence unit 223
2233 and described direction (form the second tilt angle theta 2 (acute angle) between third direction z), and first incline
Rake angle θ 1 is substantially the same with the second tilt angle theta 2.Wherein, the first tilt angle theta 1 or the second is inclined
Rake angle θ 2 can be between 2 degree to 30 degree (1 30 ° of 2 ° of θ, 2 ° θ 2 30 °).On the implementation,
Catoptric arrangement 2234 can be fabricated to the shape with kink t of such as but not limited to such as Fig. 2 b, with
The light emergence face 2233 of luminescence unit 223 is made to form the second inclination with the third direction z of vertical exiting surface o
Angle, θ 2, and the first tilt angle theta 1 of formation is substantially equal and incidence surface i and third direction z between.
In addition, the backlight module 22 of the present embodiment sequentially have from down to up 4 blooming pieces 224,225,
226th, as a example 227.Blooming piece 224,225,226,227 for example can be respectively diffusion sheet, prismatic lenses,
Brightness enhancement film or a combination thereof, are not any limitation as, and thereby make the light of injection exiting surface o pass through blooming piece
224th, 225,226,227 when can form uniform area source.
Reflection device 228 is arranged at the bottom surface b (another surface relative with exiting surface o) of light guide plate 221,
And the light being incident upon bottom surface b can be reflexed to again the inside of light guide plate 221, thereby improve the utilization of light
Rate.Wherein, reflection device 228 can be reflecting layer (the such as coat of metal) or reflector plate, here, with
As a example reflector plate, and its thickness is less than the thickness of light guide plate 221.In addition, reflection device 228 also has
The reflecting material of high reflectance, and reflecting material for example can comprise metal, metal-oxide, high reflection paint
(white paint), reflective membrane or a combination thereof.
Additionally, display device 2 further includes backboard 23, and display floater 21 is arranged on backlight module 22
In backboard 23.Wherein, backboard 23 is in order to accommodating display floater 21 and backlight module 22, and provide collision,
Electromagnetic wave, electric shock or aqueous vapor etc. are protected.The material of backboard 23 can be selected plastics, metal, alloy, be gathered
Ester, carbon are fine, or a combination thereof, are not any limitation as.
Hold, in the display device 2 of the present embodiment, because luminescent device 2231 is by light emergence face 2233
Light source is provided, and light guide plate 221 is incident to by incidence surface i, and projected by exiting surface o.In addition, passing through
The first tilt angle theta 1 that the incidence surface i of light guide plate 221 is formed with the direction of vertical exiting surface o, with light
The second tilt angle theta 2 that outgoing plane 2233 is formed with described direction is substantially equal, and can be lifted luminous single
Coupling effect between unit 223 and light element 221, uses and reduces display device 2 light leak and avoid
The generation of bright spot.
In sum, in the backlight module of the present invention and display device, luminescence unit has light emergence face,
And luminescent device provides light source by light emergence face, and light guide plate is incident to by incidence surface, and is penetrated by exiting surface
Go out.In addition, the direction of incidence surface and vertical exiting surface forms the first angle of inclination, light emergence face with described
Direction forms the second angle of inclination, and the first angle of inclination is substantially the same with the second angle of inclination.This
Bright the first angle of inclination being formed by incidence surface and described direction and light emergence face and the formation of described direction
Second angle of inclination is substantially the same, can lift the coupling effect between luminescence unit and light element, thereby
The generation reducing display device light leak and avoiding bright spot.
The foregoing is only illustrative, rather than be restricted.Any spirit and scope without departing from the present invention,
And the equivalent modifications that it is carried out or change, should be included in appended claims.
Claims (10)
1. a kind of backlight module, comprising:
Light guide plate, has at least one incidence surface and the exiting surface being connected with described incidence surface；And
Luminescence unit, has substrate, at least one luminescent device and light emergence face, described luminescent device setting
Over the substrate, described luminescent device provides light source by described light emergence face, and incident by described incidence surface
To described light guide plate, and projected by described exiting surface；
Wherein, described incidence surface forms the first angle of inclination with the direction of vertical described exiting surface, and described light is penetrated
Appear to form the second angle of inclination, described first angle of inclination and described second angle of inclination phase with described direction
With.
2. backlight module according to claim 1, inclines in wherein said first angle of inclination or described second
Rake angle is between 2 degree to 30 degree.
3. backlight module according to claim 1, wherein said light emergence face is contacted with described incidence surface.
4. backlight module according to claim 1, wherein said luminescence unit has more catoptric arrangement,
Described catoptric arrangement has kink, and described light emergence face is the opening of described catoptric arrangement.
5. a kind of display device, comprising:
Display floater；And
Backlight module, relative with described display floater and set, and comprise light guide plate and luminescence unit, described
Light guide plate has at least one incidence surface and the exiting surface being connected with described incidence surface, and described luminescence unit has
Substrate, at least one luminescent device and light emergence face, described luminescent device is arranged at described substrate, described
Optical device provides light source by described light emergence face, and is incident to described light guide plate by described incidence surface, and by institute
State exiting surface to project；
Wherein, described incidence surface forms the first angle of inclination with the direction of vertical described exiting surface, and described light is penetrated
Appear to form the second angle of inclination, described first angle of inclination and described second angle of inclination phase with described direction
With.
6. display device according to claim 5, inclines in wherein said first angle of inclination or described second
Rake angle is between 2 degree to 30 degree.
7. display device according to claim 5, wherein said light emergence face is contacted with described incidence surface.
8. display device according to claim 5, wherein said luminescence unit has more catoptric arrangement,
Described catoptric arrangement has kink, and described light emergence face is the opening of described catoptric arrangement.
9. display device according to claim 5, further includes:
Glue frame, is adjacent to described light guide plate, and has setting face and be installed with described substrate.
10. display device according to claim 9, wherein said glue frame have loading end be installed with described
Display floater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416948.XA CN106353849A (en) | 2015-07-15 | 2015-07-15 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416948.XA CN106353849A (en) | 2015-07-15 | 2015-07-15 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106353849A true CN106353849A (en) | 2017-01-25 |
Family
ID=57842332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510416948.XA Pending CN106353849A (en) | 2015-07-15 | 2015-07-15 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106353849A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624811A (en) * | 2022-05-17 | 2022-06-14 | 深圳市北泰显示技术有限公司 | Production method of display screen backlight module |
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| CN2831180Y (en) * | 2005-09-09 | 2006-10-25 | 群康科技(深圳)有限公司 | Backlight modular |
| JP2008277073A (en) * | 2007-04-27 | 2008-11-13 | Citizen Electronics Co Ltd | Light emitting diode |
| CN104536079A (en) * | 2014-12-31 | 2015-04-22 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module with light guide plate |
| CN106287577A (en) * | 2015-06-24 | 2017-01-04 | 南京瀚宇彩欣科技有限责任公司 | Backlight module and display device |
-
2015
- 2015-07-15 CN CN201510416948.XA patent/CN106353849A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831180Y (en) * | 2005-09-09 | 2006-10-25 | 群康科技(深圳)有限公司 | Backlight modular |
| JP2008277073A (en) * | 2007-04-27 | 2008-11-13 | Citizen Electronics Co Ltd | Light emitting diode |
| CN104536079A (en) * | 2014-12-31 | 2015-04-22 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module with light guide plate |
| CN106287577A (en) * | 2015-06-24 | 2017-01-04 | 南京瀚宇彩欣科技有限责任公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624811A (en) * | 2022-05-17 | 2022-06-14 | 深圳市北泰显示技术有限公司 | Production method of display screen backlight module |
| CN114624811B (en) * | 2022-05-17 | 2022-08-16 | 深圳市北泰显示技术有限公司 | Production method of display screen backlight module |
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Application publication date: 20170125 |