CN107966760A - Light guide plate assembly, backlight module and display device - Google Patents
Light guide plate assembly, backlight module and display device Download PDFInfo
- Publication number
- CN107966760A CN107966760A CN201810052713.0A CN201810052713A CN107966760A CN 107966760 A CN107966760 A CN 107966760A CN 201810052713 A CN201810052713 A CN 201810052713A CN 107966760 A CN107966760 A CN 107966760A
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- light
- guide plate
- emitting
- light guide
- plate
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- 230000003287 optical effect Effects 0.000 claims description 44
- 239000000758 substrate Substances 0.000 claims description 18
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000002310 reflectometry Methods 0.000 claims description 5
- 238000002834 transmittance Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000000644 propagated 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
-
- 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
-
- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of light guide plate assembly, including at least one light-emitting plate group, at least one initial light guide plate and at least one middle light guide plate, each light-emitting plate group corresponds to an initial light guide plate and a middle light guide plate, and light-emitting plate group includes two light-emitting plates being arranged side by side along predetermined direction；The initial light guide plate is stacked with a thickness direction along the light guide plate assembly in two light-emitting plates, one side of the initial light guide plate is formed as the incidence surface of the initial light guide plate, and the incidence surface of the initial light guide plate with and the incidence surface of light-emitting plate that is laminated of the initial light guide plate towards identical；One side of middle light guide plate and the light-emitting surface of the initial light guiding surface fit, another side of the middle light guide plate fits with another the incidence surface in two light-emitting plates.The present invention also provides a kind of backlight module and a kind of display device.The backlight module can realize Partial controll, and have less thickness.
Description
Technical field
The present invention relates to display technology field, and in particular, to a kind of light guide plate assembly, one kind include the light guide plate assembly
Backlight module and a kind of display device including the backlight module.
Background technology
Liquid crystal display device generally includes liquid crystal panel and backlight module.Traditional backlight module includes two kinds of embodiment party
Formula, one kind is straight-down negative, and another kind is side entering type.In order to realize the lightening of display device, the backlight moulds for using side entering type more
Group, i.e. light-emitting component is arranged on to the side of light guide plate.But the backlight module of this side entering type can not realize zonal control
The emitting brightness of backlight module, can not realize more preferable display effect.
Therefore, how to realize the zonal control of side entrance back module becomes this area technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of light guide plate assembly, a kind of backlight module and one including the light guide plate assembly
Kind includes the display device of the backlight module.The backlight module can realize zonal control.
In order to realize it is above-mentioned face, as one aspect of the present invention, there is provided a kind of light guide plate assembly, wherein, it is described to lead
Light panel components include at least one light-emitting plate group, at least one initial light guide plate and at least one middle light guide plate, each described
Light-emitting plate group corresponds to an initial light guide plate and a middle light guide plate,
The light-emitting plate group includes two light-emitting plates being arranged side by side along predetermined direction, a side shape of the light-emitting plate
As the incidence surface of the light-emitting plate, the bottom surface of the light-emitting plate is formed as the first reflective surface of the light-emitting plate, the light-emitting plate
Top surface be formed as the light-emitting surface of the light-emitting plate, the side opposite with the incidence surface of the light-emitting surface is formed in the light-emitting plate
For the second reflective surface of the light-emitting plate, the angle between first reflective surface and the light-emitting surface is obtuse angle, the light extraction
Second reflective surface of plate can will pass through the light reflection of the first reflective surface incidence of the light-emitting plate to the first of the light-emitting plate
Reflective surface, the first reflective surface of the light-emitting plate can be by the light that the second reflective surface of the light-emitting plate reflects towards the light extraction
The light-emitting surface reflection of plate；
A thickness direction along the light guide plate assembly in the initial light guide plate and two light-emitting plates is laminated
Setting, a side of the initial light guide plate is formed as the incidence surface of the initial light guide plate, and the initial light guide plate
Incidence surface with and initial light guide plate stacking light-emitting plate incidence surface towards identical, on the initial light guide plate with it is described initial
The opposite side of light guide plate is formed as the light-emitting surface of the initial light guide plate, and the bottom surface of the initial light guide plate is plane；
One side of the middle light guide plate and the light-emitting surface of the initial light guiding surface fit, the middle light guide plate
Another side fit with another the incidence surface in two light-emitting plates, the top surface of the middle light guide plate with and
Angle between the light-emitting surface for the light-emitting plate that the middle light guide plate is connected is obtuse angle, the bottom surface of the middle light guide plate with it is described just
Angle between the bottom surface of beginning light guide plate is obtuse angle.
Preferably, the light-emitting surface of all light-emitting plates is concordant in the light guide plate assembly.
Preferably, the top surface of the middle light guide plate between the light-emitting surface of light-emitting plate that is connected of the middle light guide plate
Angle is 135 °, and the angle between the bottom surface of the bottom surface of the middle light guide plate and the initial light guide plate is 135 °.
Preferably, second reflective surface and the angle between the straight line of first reflective surface meet following public
Formula：
Wherein, α is second reflective surface and the angle between the straight line of first reflective surface；
H is size of the incidence surface of light-emitting plate along the thickness direction of the light-emitting plate,
L is the incidence surface of the light-emitting plate the distance between to the top margin of second reflective surface of light-emitting plate.
Preferably, include simultaneously formed with optical microstructures, the optical microstructures on the first reflective surface of the light-emitting plate
The multiple prisms set are arranged, close to one of described second reflective surface are 45 ° in two base angles of the prism, described three
Angle away from one of second reflective surface in two base angles of prism meets the following formula：
Wherein, c is the angle away from one of second reflective surface in two base angles of the prism；
N is the refractive index of light-emitting plate.
Preferably, the material of the light-emitting plate is arranged so that transmissivity of the light-emitting plate at second reflective surface
With the ratio between reflectivity (10:90)~(20:80) in the range of.
As the second aspect of the invention, there is provided a kind of backlight module, wherein, the backlight module includes control mould
Block, light source assembly and light guide plate assembly, the light guide plate assembly are above-mentioned light guide plate assembly provided by the present invention, the light source
Component includes multiple output optical zones, and the incidence surface of the initial light guide plate corresponds at least one output optical zone, initially led with described
The incidence surface for the light-emitting plate that tabula rasa is stacked corresponds at least one output optical zone, and the control module can adjust each institute
State the luminosity of output optical zone.
Preferably, the light source assembly includes collimated light source and light path switch plate, and the light path switch plate includes multiple open
Close region, each switch region corresponds to an output optical zone, the light path switch plate be arranged on the collimated light source and
Between the light guide plate assembly, the control module can adjust the light transmittance of each output optical zone of light path switch plate.
Preferably, the light path switch plate includes first substrate, second substrate, is arranged on the first substrate and described the
Liquid crystal material layer between two substrates, the whole face electrode being arranged on the first substrate, be arranged on the second substrate
Multiple coordination electrodes, are provided with a coordination electrode in each switch region, the control module can respectively to
The whole face electrode and each coordination electrode provide voltage signal.
As the third aspect of the invention, there is provided a kind of display device, the display device include display panel and use
In the backlight module that light source is provided for the display panel, wherein, the backlight module is above-mentioned backlight provided by the present invention
Module.
The light for being radiated at the incidence surface of light-emitting plate is emitted from the light-emitting surface of light-emitting plate, is radiated at the incidence surface of initial light guide plate
Light be emitted from the light-emitting surface of light-emitting plate, the two is independent of each other, and therefore, can be radiated at light-emitting plate by controlling respectively enters light
The intensity of the light in face and it is radiated at the intensity of light of incidence surface of initial light guide plate and controls the bright of the emergent light of each light-emitting plate
Degree, so as to realize the Region control of backlight luminosity (local dimming).It is that is, provided by the present invention
Light guide plate assembly can be used for the backlight module of side entering type, and can realize the Region control of luminosity.
Brief description of the drawings
Attached drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the dimensional structure diagram of light guide plate assembly provided by the present invention；
Fig. 2 is the side view of light guide plate assembly provided by the present invention；
Fig. 3 is the enlarged drawing at I in Fig. 2；
Fig. 4 is the schematic diagram of figure backlight module provided by the present invention；
Fig. 5 be light source assembly luminous zone and light guide plate assembly regional correspondence figure.
Description of reference numerals
110：Light-emitting plate group 111,112：Light-emitting plate
120：Initial light guide plate 130：Middle light guide plate
410：Control module 420：Light source assembly
421：Collimated light source 422：Light path switch plate
111a：Incidence surface 111b：Second reflective surface
111c：First reflective surface 111d：Light-emitting surface
112a：First reflective surface 112b：Second reflective surface
112c：Light-emitting surface 130a：Bottom surface
130b：Top surface
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
As the first aspect of the invention, there is provided a kind of light guide plate assembly, wherein, as shown in Figure 1, the light guide plate group
Part includes at least one light-emitting plate group 110, at least one initial light guide plate 120 and at least one middle light guide plate 130, each goes out
Tabula rasa group 110 corresponds to light guide plate 130 among an initial light guide plate 120 and one.
Two light-emitting plates that light-emitting plate group 110 includes being arranged side by side along predetermined direction (are light-emitting plate 111 and light extraction in Fig. 1
Plate 112), a side of the light-emitting plate is formed as the incidence surface of the light-emitting plate, and the bottom surface of the light-emitting plate is formed as described
First reflective surface of light-emitting plate, the top surface of the light-emitting plate are formed as the light-emitting surface of the light-emitting plate, in the light-emitting plate with institute
The opposite side of incidence surface for stating light-emitting surface is formed as the second reflective surface of the light-emitting plate, first reflective surface with it is described go out
Angle between smooth surface is obtuse angle, and the second reflective surface of the light-emitting plate will can be entered by the first reflective surface of the light-emitting plate
For the light reflection penetrated to the first reflective surface of the light-emitting plate, the first reflective surface of the light-emitting plate can be by the of the light-emitting plate
The light-emitting surface of the light of two reflective surfaces reflection towards the light-emitting plate reflects.
Initial light guide plate 120 is set with one in two light-emitting plates along the thickness direction stacking of the light guide plate assembly
Put and (be stacked in Fig. 1 and Fig. 2 with light guide plate 111), a side of initial light guide plate 120 is formed as the initial light guide plate
120 incidence surface, and the incidence surface of initial light guide plate 120 with and the initial stacking of light guide plate 120 light-emitting plate incidence surface court
To identical, the side opposite with initial light guide plate 120 is formed as the light-emitting surface of the initial light guide plate on initial light guide plate 120,
The bottom surface of initial light guide plate 120 is plane.
One side of middle light guide plate 130 and the light-emitting surface of initial light guiding surface 120 fit, middle light guide plate 130
Another side and the incidence surface of another (light-emitting plate 112 in Fig. 1 and Fig. 2) in two light-emitting plates fit.In
Between light guide plate 130 top surface and the angle beta between the light-emitting surface of light-emitting plate that is connected of the middle light guide plate 1301For obtuse angle, in
Between angle beta between the bottom surface of light guide plate 130 and the bottom surface of initial light guide plate 1202For obtuse angle.
It is former with work of the embodiment shown in Fig. 1 and Fig. 2 to light guide plate assembly provided by the present invention below
Reason is described in detail.
As depicted in figs. 1 and 2, light-emitting plate group 110 includes light-emitting plate 111 and light-emitting plate 112, wherein, light-emitting plate 111 with just
Beginning light guide plate 120 is stacked.
As shown in figure 4, after light is radiated on the incidence surface 111a of light-emitting plate 111, light-emitting plate is transmitted in light-emitting plate 111
111 the second reflective surface 111b, since second reflective surface 111b is inclined-plane, and light-emitting plate 111 is optically denser medium, air is light
Medium is dredged, therefore, being radiated at the light of the second light-emitting area 111b will reflect, and it is first anti-to be reflected in light-emitting plate 111 for light
Smooth surface 111a, then reflexes to the light-emitting surface 111c of light-emitting plate 111 by first reflective surface 111a and is emitted.
As shown in figure 4, light is radiated on the incidence surface of the initial light guide plate 120 of the lower section of light-emitting plate 111, and initial guide-lighting
Propagated in plate 120, until the light-emitting surface of initial light guide plate 120, due to light-emitting surface and the middle light guide plate of initial light guide plate 120
130 side fitting, therefore, is directly entered in middle light guide plate 130, and be radiated at from the light of initial light guide plate 120 outgoing
Between light guide plate 130 bottom surface 130a.After light is radiated at the bottom surface 130a of middle light guide plate 130, by the bottom of the middle light guide plate 130
Face 130a reflexes to the top surface 130b of middle light guide plate, and is reflected by the top surface 130b of the middle light guide plate 130 into light-emitting plate 112
In.
Light into light-emitting plate 112 is radiated on the second reflective surface 112b of light-emitting plate 112, and by second reflective surface
112b is reflexed on the first reflective surface 112a of light-emitting plate 112, and the light extraction by the first reflective surface 112a towards light-emitting plate 112
Face 112c is simultaneously emitted.
It follows that the light for being radiated at the incidence surface of light-emitting plate 111 is emitted from the light-emitting surface of light-emitting plate 111, it is radiated at just
The light of the incidence surface of beginning light guide plate 120 is emitted from the light-emitting surface of light-emitting plate 112, the two is independent of each other, and therefore, can pass through difference
Control is radiated at the intensity of the light of the incidence surface of light-emitting plate 111 and is radiated at the intensity of the light of the incidence surface of initial light guide plate 120
To control the brightness of the emergent light of each light-emitting plate, so as to realize the Region control (local of backlight luminosity
dimming).That is, light guide plate assembly provided by the present invention can be used for the backlight module of side entering type, and can be real
The Region control of existing luminosity.
In order to ensure preferable light-out effect and easy to assemble, it is preferable that all light-emitting plates in the light guide plate assembly
Light-emitting surface it is concordant.
In general, light is with incident perpendicular to the direction of the incidence surface of initial light guide plate 120, in order to ensure from initial light guide plate
The light of the light of 120 incidence surface incidence can be by middle light guide plate 130 conduction completely to the light extraction being connected with middle light guide plate 130
In plate 112, it is preferable that the top surface 130b of middle light guide plate 130 with and the middle light guide plate 130 light-emitting plate 112 that is connected go out
Angle beta 1 between smooth surface is 135 °, the angle between the bottom surface 130a of middle light guide plate 130 and the bottom surface of initial light guide plate 120
β 2 is 135 °.
In order to ensure the light of the second reflective surface reflection can be covered with the first reflective surface, and ensure the uniform light extraction of light-emitting plate, it is excellent
Selection of land, second reflective surface and the angle between the straight line of first reflective surface meet the following formula：
Wherein, α is second reflective surface and the angle between the straight line of first reflective surface, such as Fig. 3 institutes
Show；
H is size of the incidence surface of light-emitting plate along the thickness direction (above-below direction in Fig. 2) of the light-emitting plate；
L is the incidence surface of the light-emitting plate the distance between to the top margin of second reflective surface of light-emitting plate.
In the present invention, the concrete structure of first reflective surface is not particularly limited, as long as will can irradiate
Light reflection on first reflective surface goes out the light-emitting surface.As a kind of embodiment, the of the light-emitting plate
Formed with optical microstructures on one reflective surface, the optical microstructures include the multiple prisms being arranged side by side.Second reflective surface
After the light of reflection is radiated on the side of prism, reflected by the side towards light-emitting surface.In order to ensure the side of prism
The light of face reflection can be emitted with being approximately perpendicular to the direction of light-emitting surface, it is preferable that close in two base angles of the prism
One of described second reflective surface is 45 °, the angle away from one of second reflective surface in two base angles of the prism
Degree meets the following formula：
Wherein, c is the angle away from one of second reflective surface in two base angles of the prism, such as Fig. 3 institutes
Show；
N is the refractive index of light-emitting plate.
Conducted for the ease of light from initial light guide plate 120 to middle light guide plate 130, it is preferable that middle light guide plate 130 and phase
The initial light guide plate 120 and corresponding light-emitting plate answered are formed as one.
As shown in fig. 1, there is interval between two neighboring light-emitting plate (that is, light-emitting plate 111 and light-emitting plate 112), in order to
Light guide plate assembly is prevented in light extraction, existing dark line at the interval location between two neighboring light-emitting plate, it is preferable that the light extraction
The material of plate is arranged so that the ratio between the transmissivity and reflectivity of the light-emitting plate at second reflective surface (10:90)~
(20:80) in the range of.As shown in figure 4, a small amount of light is emitted from the second reflective surface of light-emitting plate 111, middle light guide plate is radiated at
On 130 upper surface 130b, and by middle light guide plate 130 upper surface 130b reflect, so as to avoid it is two neighboring go out
Existing dark line at interval location between tabula rasa.At the same time, the transmissivity due to the light-emitting plate at second reflective surface
With the ratio between reflectivity (10:90)~(20:80) in the range of, therefore, only a small amount of light is emitted from the second reflective surface, so as to
Reduced to avoid the light-emitting surface emitting brightness of light-emitting plate.
As a kind of embodiment, it is 12% that light-emitting plate can be arranged to the transmissivity at the second reflective surface,
Reflectivity is 88%.
As the second aspect of the invention, there is provided a kind of backlight module, wherein, as shown in figure 4, the backlight module bag
Control module 410, light source assembly 420 and light guide plate assembly are included, which is power above-mentioned leaded light provided by the present invention
Plate component.Light source assembly 420 includes multiple output optical zones, and the incidence surface of initial light guide plate 120 corresponds at least one output optical zone,
At least one output optical zone corresponding with the incidence surface for the light-emitting plate that initial light guide plate 120 is stacked, the control module energy
Enough adjust the luminosity of each output optical zone.
It is easily understood that the brightness for the light that the incidence surface of initial light guide plate 120 receives, will influence and initial leaded light
The emitting brightness for the light-emitting plate that plate 120 is connected by middle light guide plate 130.And the light extraction being stacked with initial light guide plate 120
The brightness for the light that the incidence surface of plate receives will influence the brightness of the light-emitting surface of the light-emitting plate.
Shown in Fig. 5 be the incidence surface of light extraction region light guide plate assembly schematic diagram and light source assembly output optical zone pair
The schematic diagram that should be related to.As shown in Figure 5, the region a1 on the incidence surface of initial light guide plate 120 corresponds to output optical zone a, initially leads
Region b1 on the incidence surface of tabula rasa 120 corresponds to output optical zone b, and the region c1 on the incidence surface of light-emitting plate 111 corresponds to output optical zone
C, the region d1 of the incidence surface three of light-emitting plate 111 correspond to output optical zone d.
In the backlight, the output optical zone a of light source assembly corresponds to the region a1 and light-emitting plate of initial light guide plate 120
Region a2 on 112 light-emitting surface.The light that output optical zone a is sent injects initial light guide plate by the region a1 of initial light guide plate 120
In 120, and guided by initial light guide plate 120 and middle light guide plate 130 to the region a2 on the light-emitting surface of light-emitting plate 112.
When adjusting the brightness of output optical zone a, the brightness of the region a2 of the light-emitting surface three of light-emitting plate 112 can change.
In the backlight, the output optical zone b of light source assembly corresponds to the region b1 and light-emitting plate of initial light guide plate 120
Region b2 on 112 light-emitting surface.The light that output optical zone b is sent injects initial light guide plate by the region b1 of initial light guide plate 120
In 120, and guided by initial light guide plate 120 and middle light guide plate 130 to the region b2 on the light-emitting surface of light-emitting plate 112.
When adjusting the brightness of output optical zone b, the brightness of the region b2 of the light-emitting surface three of light-emitting plate 112 can change.
In the backlight, the output optical zone c of light source assembly corresponds to the region c1 and light-emitting plate of initial light guide plate 120
Region c2 on 112 light-emitting surface.The light that output optical zone c is sent injects initial light guide plate by the region c1 of initial light guide plate 120
In 120, and guided by initial light guide plate 120 and middle light guide plate 130 to the region c2 on the light-emitting surface of light-emitting plate 112.
When adjusting the brightness of output optical zone c, the brightness of the region c2 of the light-emitting surface three of light-emitting plate 112 can change.
In the backlight, the output optical zone d of light source assembly corresponds to the region d1 and light-emitting plate of initial light guide plate 120
Region d2 on 112 light-emitting surface.The light that output optical zone d is sent injects initial light guide plate by the region d1 of initial light guide plate 120
In 120, and guided by initial light guide plate 120 and middle light guide plate 130 to the region d2 on the light-emitting surface of light-emitting plate 112.
When adjusting the brightness of output optical zone d, the brightness of the region d2 of the light-emitting surface three of light-emitting plate 112 can change.
Backlight module provided by the present invention is side entrance back module, has less thickness, also, each by adjusting
The brightness of a output optical zone can realize that the brightness of regional on the light-emitting surface to backlight module is adjusted, and be conducive to enhancing bag
Include the display effect of the display device of the backlight module.
In the present invention, special restriction is not done to the concrete structure of light source assembly.For example, backlight can include it is more
A adjustable light source of brightness, each adjustable light source of brightness correspond to an output optical zone.For the ease of controlling and reducing the back of the body
The size of optical mode group, it is preferable that the light source assembly includes collimated light source 421 and light path switch plate 422, the light path switch plate
422 include multiple switch region, and each switch region corresponds to an output optical zone, and the light path switch plate is arranged on institute
State between collimated light source and the light guide plate assembly, the control module can adjust each output optical zone of light path switch plate
Light transmittance.
The collimated light that the light guide plate assembly can send collimated light source is converted to the collimation area source of uniform.It is accurate
Face the light that light source is sent directly not dissipate uniformly, therefore, the brightness that the light-emitting surface of the backlight is sent is higher, so as to drop
Low energy consumption.Also, since collimated light does not dissipate, when collimated light transmits in initial light guide plate and middle light guide plate, not
The brightness of the light-emitting plate above initial light guide plate is influenced whether, so as to ensure the light-emitting surface uniform in light emission of each light-emitting plate.
As a kind of embodiment, the light path switch plate includes first substrate, second substrate, is arranged on described the
Liquid crystal material layer between one substrate and the second substrate, the whole face electrode being arranged on the first substrate, be arranged on institute
Multiple coordination electrodes on second substrate are stated, a coordination electrode, the control are provided with each switch region
Module can provide voltage signal to the whole face electrode and each coordination electrode respectively.
Electric field is formed between coordination electrode and front electrode, so as to control the deflection of liquid crystal molecule in liquid crystal material layer
Degree, so as to adjust the light transmittance in the corresponding region of the coordination electrode.
As the third aspect of the invention, there is provided a kind of display device, the display device include display panel and use
In the backlight module that light source is provided for the display panel, wherein, the backlight module is above-mentioned backlight provided by the present invention
Module.
As mentioned above it is possible, the backlight module is the backlight module of side entering type, therefore, the display device can have
Less thickness, also, the backlight module can realize the Partial controll of brightness, therefore, the display device can have
Preferable display effect.And, it is preferable that the display device can be the liquid crystal display device with HDR.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the present invention is not limited thereto.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
- A kind of 1. light guide plate assembly, it is characterised in that the light guide plate assembly include at least one light-emitting plate group, it is at least one just Beginning light guide plate and at least one middle light guide plate, each light-emitting plate group are corresponded to described in an initial light guide plate and one Middle light guide plate,The light-emitting plate group includes two light-emitting plates being arranged side by side along predetermined direction, and a side of the light-emitting plate is formed as The incidence surface of the light-emitting plate, the bottom surface of the light-emitting plate are formed as the first reflective surface of the light-emitting plate, the top of the light-emitting plate Face is formed as the light-emitting surface of the light-emitting plate, and the side opposite with the incidence surface of the light-emitting surface is formed as institute in the light-emitting plate The second reflective surface of light-emitting plate is stated, the angle between first reflective surface and the light-emitting surface is obtuse angle, the light-emitting plate Second reflective surface can will be reflective by the first of the light reflection of the first reflective surface incidence of the light-emitting plate to the light-emitting plate Face, the first reflective surface of the light-emitting plate can be by the light that the second reflective surface of the light-emitting plate reflects towards the light-emitting plate Light-emitting surface reflects；The initial light guide plate is stacked with a thickness direction along the light guide plate assembly in two light-emitting plates, One side of the initial light guide plate is formed as the incidence surface of the initial light guide plate, and the incidence surface of the initial light guide plate With the incidence surface of light-emitting plate that is laminated with the initial light guide plate towards identical, on the initial light guide plate with the initial light guide plate Opposite side is formed as the light-emitting surface of the initial light guide plate, and the bottom surface of the initial light guide plate is plane；The light-emitting surface of one side of the middle light guide plate and the initial light guiding surface fits, the middle light guide plate it is another One side fits with another the incidence surface in two light-emitting plates, the top surface of the middle light guide plate with and this in Between angle between the light-emitting surface of light-emitting plate that is connected of light guide plate be obtuse angle, the bottom surface of the middle light guide plate is initially led with described Angle between the bottom surface of tabula rasa is obtuse angle.
- 2. light guide plate assembly according to claim 1, it is characterised in that all light-emitting plates goes out in the light guide plate assembly Smooth surface is concordant.
- 3. light guide plate assembly according to claim 1, it is characterised in that the top surface of the middle light guide plate with and this among Angle between the light-emitting surface for the light-emitting plate that light guide plate is connected is 135 °, the bottom surface of the middle light guide plate and the initial leaded light Angle between the bottom surface of plate is 135 °.
- 4. light guide plate assembly as claimed in any of claims 1 to 3, it is characterised in that second reflective surface with Angle between the straight line of first reflective surface meets the following formula：<mrow> <mi>t</mi> <mi>a</mi> <mi>n</mi> <mn>2</mn> <mi>&alpha;</mi> <mo>=</mo> <mfrac> <mi>H</mi> <mi>L</mi> </mfrac> <mo>,</mo> </mrow>Wherein, α is second reflective surface and the angle between the straight line of first reflective surface；H is size of the incidence surface of light-emitting plate along the thickness direction of the light-emitting plate,L is the incidence surface of the light-emitting plate the distance between to the top margin of second reflective surface of light-emitting plate.
- 5. light guide plate assembly according to claim 4, it is characterised in that on the first reflective surface of the light-emitting plate formed with Optical microstructures, the optical microstructures include multiple prisms for being arranged side by side, close in two base angles of the prism One of described second reflective surface is 45 °, the angle away from one of second reflective surface in two base angles of the prism Degree meets the following formula：<mrow> <mi>c</mi> <mo>=</mo> <mfrac> <mi>&pi;</mi> <mn>4</mn> </mfrac> <mo>-</mo> <mi>&alpha;</mi> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> <msup> <mi>sin</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mfrac> <mrow> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msup> <mi>sin</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>(</mo> <mi>n</mi> <mi> </mi> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mi>&alpha;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>&alpha;</mi> <mo>)</mo> </mrow> <mi>n</mi> </mfrac> <mo>.</mo> </mrow>Wherein, c is the angle away from one of second reflective surface in two base angles of the prism；N is the refractive index of light-emitting plate.
- 6. light guide plate assembly as claimed in any of claims 1 to 3, it is characterised in that the material of the light-emitting plate It is arranged so that the ratio between the transmissivity and reflectivity of the light-emitting plate at second reflective surface (10:90)~(20:80) In the range of.
- A kind of 7. backlight module, it is characterised in that the backlight module includes control module, light source assembly and light guide plate assembly, The light guide plate assembly is the light guide plate assembly described in any one in claim 1 to 6, the light source assembly include it is multiple go out Light area, the incidence surface of the initial light guide plate correspond at least one output optical zone, are stacked with the initial light guide plate The incidence surface of light-emitting plate corresponds at least one output optical zone, and the control module can adjust shining for each output optical zone Brightness.
- 8. backlight module according to claim 7, it is characterised in that the light source assembly includes collimated light source and light path is opened Plate is closed, the light path switch plate includes multiple switch region, and each switch region corresponds to an output optical zone, the light Way switch plate is arranged between the collimated light source and the light guide plate assembly, and the control module can adjust the light path and open Close the light transmittance of each output optical zone of plate.
- 9. the backlight module according to claim 7 or 8, it is characterised in that the light path switch plate includes first substrate, the Two substrates, the liquid crystal material layer being arranged between the first substrate and the second substrate, be arranged on the first substrate Whole face electrode, multiple coordination electrodes for being arranged on the second substrate, be provided with an institute in each switch region Coordination electrode is stated, the control module can provide voltage letter to the whole face electrode and each coordination electrode respectively Number.
- 10. a kind of display device, the display device includes display panel and the back of the body for providing light source for the display panel Optical mode group, it is characterised in that the backlight module is the backlight module described in any one in claim 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052713.0A CN107966760B (en) | 2018-01-19 | 2018-01-19 | Light guide plate assembly, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052713.0A CN107966760B (en) | 2018-01-19 | 2018-01-19 | Light guide plate assembly, backlight module and display device |
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| Publication Number | Publication Date |
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| CN107966760A true CN107966760A (en) | 2018-04-27 |
| CN107966760B CN107966760B (en) | 2020-04-10 |
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|---|---|
| CN107966760B (en) | 2020-04-10 |
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