CN109407405A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN109407405A CN109407405A CN201811571717.6A CN201811571717A CN109407405A CN 109407405 A CN109407405 A CN 109407405A CN 201811571717 A CN201811571717 A CN 201811571717A CN 109407405 A CN109407405 A CN 109407405A
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- collective optics
- area
- brightness enhancement
- enhancement film
- backlight module
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- 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
- G02F1/133603—Direct backlight with LEDs
-
- 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
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The embodiment of the invention discloses a kind of backlight module, which includes: backlight, and the backlight is for generating emergent ray；Positioned at the brightness enhancement film of the backlight light emission side, the brightness enhancement film includes the first brightness enhancement film, first brightness enhancement film includes first area and the second area around the first area, the first area of first brightness enhancement film has multiple the first collective optics extended in a first direction, the second collective optics that there is the second area of first brightness enhancement film at least one to extend along the first direction, the refractive index of second collective optics is greater than the refractive index of air, and in the same terms, under the irradiation of same light beam, the hot spot that the emergent ray of second collective optics is formed in the preset plane in the emergent ray that the hot spot that preset plane is formed is less than first collective optics, to alleviate the luminance difference of display picture fringe region and central area, improve the quality of display picture.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of backlight module and the display including the backlight module fills
It sets.
Background technique
High dynamic range images (High-Dynamic Range, abbreviation HDR), compared to common image, can provide more
More dynamic ranges and image detail can preferably reflect the visual effect in true environment, be increasingly becoming display field
Important research direction.But in the display picture of the existing display device using HDR display pattern, show the surrounding of picture
Region is partially dark compared with the central area of display picture, influences the display image quality of the display device.
Summary of the invention
In order to solve the above technical problems, the embodiment of the invention provides a kind of backlight module and display device, it is aobvious to improve
Show the quality of picture.
To solve the above problems, the embodiment of the invention provides following technical solutions:
A kind of backlight module, comprising:
Backlight, the backlight is for generating emergent ray；
Positioned at the brightness enhancement film of the backlight light emission side, the brightness enhancement film includes the first brightness enhancement film, first brightness enhancement film
The first area of second area including first area and around the first area, first brightness enhancement film has multiple edges
The second area of the first collective optics that first direction extends, first brightness enhancement film has at least one along the first direction
The second collective optics extended, the refractive index of second collective optics are greater than the refractive index of air, and in the same terms, identical
Under the irradiation of light beam, the emergent ray of second collective optics is less than the first optically focused member in the hot spot that preset plane is formed
The hot spot that the emergent ray of part is formed in the preset plane.
Optionally, first collective optics are prism, and second collective optics are convex lens.
Optionally, the second area includes multiple compositing areas, and the multiple compositing area includes be oppositely arranged
One compositing area and the second compositing area, first compositing area and second compositing area are located at the first area
It is not ipsilateral, and the value range of the width of the compositing area in a second direction is 0mm~3mm, including right end point value, wherein
The second direction is perpendicular to the first direction.
Optionally, second collective optics are along the width of the second direction and first collective optics along described the
Two directions it is of same size.
Optionally, the width value range of second collective optics in a second direction is 24 μm~40 μm, including endpoint
Value；
The number N of second collective optics is equal to S/W, wherein S indicates the compositing area along the second direction
Width, W indicate second collective optics along the width of the second direction.
Optionally, the brightness enhancement film further include:
Positioned at first brightness enhancement film towards the second brightness enhancement film of the backlight side, second brightness enhancement film includes the
Three regions and the fourth region around the third region, the third region of second brightness enhancement film have multiple along second party
To the third collective optics of extension；Wherein, the second direction is vertical with the first direction.
Optionally, the fourth region of second brightness enhancement film have it is multiple along second to extension third collective optics.
Optionally, the third collective optics are prism.
Optionally, the 4th optically focused member that there is the fourth region of second brightness enhancement film at least one to extend in a second direction
Part, the refractive index of the 4th collective optics are greater than the refractive index of air, and under the same terms, the irradiation of same light beam, institute
The emergent ray for stating the 4th collective optics exists in the emergent ray that the hot spot that preset plane is formed is less than the third collective optics
The hot spot formed in the preset plane.
Optionally, the 4th collective optics are convex lens.
Optionally, orthographic projection of the first area in second brightness enhancement film and the third area coincidence, it is described
Orthographic projection of the second area in second brightness enhancement film is overlapped with the fourth region.
Optionally, further includes:
Color conversion layer between the brightness enhancement film and the backlight；
Diffusion barrier between the color conversion layer and the brightness enhancement film.
A kind of display device, comprising:
Backlight module provided by any of the above-described, and the display panel positioned at the backlight module light emission side.
Compared with prior art, above-mentioned technical proposal has the advantage that
In technical solution provided by the embodiment of the present invention, the brightness enhancement film includes the first brightness enhancement film, first blast
Film includes first area and the second area around the first area, and the first area of first brightness enhancement film has multiple
There is the second area of the first collective optics extended in a first direction, first brightness enhancement film at least one to prolong along first direction
The second collective optics stretched, the refractive index of second collective optics is greater than the refractive index of air, so that second optically focused
The light of element second collective optics described in directive has spotlight effect, improves the light intensity of the second area,
And the same terms, same light beam irradiation under, it is small that the emergent rays of second collective optics in preset plane forms hot spot
In the hot spot that the emergent ray of first collective optics is formed in the preset plane, so that second collective optics
Spotlight effect be greater than first collective optics spotlight effect, so that the light for reducing the second area emergent ray is strong
Difference between degree and the light intensity of first area emergent ray alleviates the display picture of the display device including the backlight module
The fringe region in the face phenomenon partially dark compared with the central area of display picture, improves the display quality of display picture.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of backlight module provided by one embodiment of the invention；
Fig. 2 is the top view of the first brightness enhancement film in backlight module provided by one embodiment of the invention；
Fig. 3 is the structural schematic diagram of backlight module provided by another embodiment of the present invention；
Fig. 4 is the structural schematic diagram of backlight module provided by another embodiment of the invention；
Fig. 5 is the structural schematic diagram of backlight module provided by further embodiment of the present invention；
Fig. 6 is the structural schematic diagram of backlight module provided by another embodiment of the invention；
Fig. 7 is the structural schematic diagram of backlight module provided by further embodiment of the present invention；
Fig. 8 is the structural schematic diagram of backlight module provided by another embodiment of the invention；
Fig. 9 is the structural schematic diagram of backlight module provided by further embodiment of the present invention；
Figure 10 is the structural schematic diagram of display device provided by one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Existing display device generally includes display panel and backlight module, and the backlight module is down straight aphototropism mode set,
Including multiple LED light sources composition LED array and positioned at the fluorescent film of the LED array light light emission side, wherein it is described
LED light source is blue-ray LED, issue blue ray, the fluorescent film under the excitation for the blue ray that the LED light source is emitted,
The light that the blue ray that the LED light source is emitted is converted into multiple colors is projected, the light of the multiple color mixes shape
At white light, in order to which the white light that the display panel can use the backlight module outgoing carries out the display of picture.
Specifically, multiple LED light sources are arranged in array in the backlight module, the light that each LED light source issues is in spoke
Shape is penetrated, so that the light that the light intensity of the central area of the LED array is greater than the fringe region of the LED array is strong
Degree, so that the light ray energy of the central area of the LED array is greater than the light energy of the fringe region of the LED array
Amount, such that including central area of the fringe region compared with display picture of the display picture of the display device of the backlight module
It is partially dark, influence the quality for showing picture.
It should be noted that, although the LED light source in the backlight module is usually blue-ray LED at present, but the present invention couple
This and without limitation, in other embodiments of the invention, LED light source in the backlight module can also be to issue other face
The LED of coloured light line, such as red-light LED, green light LED or purple LED, specifically depend on the circumstances.
In view of this, the embodiment of the invention provides a kind of backlight modules, as shown in Figure 1, the backlight module includes:
Backlight 10, the backlight 10 is for generating emergent ray；
Positioned at the brightness enhancement film of 10 light emission side of backlight, the brightness enhancement film includes the first brightness enhancement film 20, and described first increases
Bright film 20 is used to increase the transmission amount for the light that the backlight 10 is emitted.Optionally, first brightness enhancement film 20 includes first
Region and second area around the first area, the first area of first brightness enhancement film 20 have multiple along first party
There is the second area of the first collective optics 21 extended to X, first brightness enhancement film 20 at least one to extend along first direction X
The second collective optics 22, the refractive index of second collective optics 22 is greater than the refractive index of air, so that described second is poly-
The light of second collective optics 22 described in directive of optical element 22 has spotlight effect, improves the light of the second area
Intensity, and the same terms, same light beam irradiation under, the emergent ray of second collective optics 22 is formed in preset plane
Hot spot is less than the hot spot that the emergent ray of first collective optics 21 is formed in the preset plane, so that described second
The spotlight effect of collective optics 22 is greater than the spotlight effect of first collective optics 21, to reduce the second area outgoing
Difference between the light intensity of light and the light intensity of first area emergent ray alleviates the display including the backlight module
The fringe region of the display picture of the device phenomenon partially dark compared with the central area of display picture, improves the display matter of display picture
Amount.
On the basis of the above embodiments, in one embodiment of the invention, the refraction of first collective optics 21
Rate be greater than air refractive index so that first collective optics 21 can to directive its light have spotlight effect, mention
The light intensity of the high first area reduces the power consumption of the backlight 10 under the brightness of identical display picture.
Based on any of the above embodiments, in one embodiment of the invention, second collective optics 22
Refractive index is greater than the refractive index of first collective optics 21, so that the spotlight effect of second collective optics 22 is greater than institute
State the spotlight effect of the first collective optics 21；In the present embodiment, second collective optics 22 and first collective optics
21 shape may be the same or different, the present invention to this and without limitation, as long as can guarantee second collective optics
22 spotlight effect is greater than the spotlight effect of first collective optics 21.
In another embodiment of the present invention, the refraction of second collective optics 22 and first collective optics 21
Rate is identical, and second collective optics 22 are different from the shape of first collective optics 21, so that second optically focused is first
The spotlight effect of part 22 is greater than the spotlight effect of first collective optics 21.
On the basis of the above embodiments, in one embodiment of the invention, the material of second collective optics 22
It is identical as the material of first collective optics 21, so that second collective optics 22 and first collective optics 21 can
To complete in same step process, simplifies the process flow of the backlight module, reduce the cost of the backlight module.
Based on any of the above embodiments, in one embodiment of the invention, first collective optics 21 are
Prism, second collective optics 22 are convex lens, but the present invention is to this and without limitation, in the other embodiment of the present invention
In, first collective optics 21 and second collective optics 22 can also be other shapes, as long as guaranteeing that described second is poly-
The spotlight effect of optical element 22 is greater than the spotlight effect of first collective optics 21.
Based on any of the above embodiments, in one embodiment of the invention, as shown in Fig. 2, secondth area
Domain B includes multiple compositing areas, and the multiple compositing area includes the composition of the first compositing area B1 being oppositely arranged and second area
Domain B2, the first compositing area B1 and the second compositing area B2 are located at the not ipsilateral of the first area A, and described group
Value range at the region width of Y in a second direction is 0mm~5mm, including right end point value, wherein the second direction Y hangs down
Directly in the first direction X.But the present invention is to this and without limitation, in other embodiments of the invention, the compositing area
The width value range of Y can also be other ranges in a second direction, and specific view includes the aobvious of the display device of the backlight module
Depending on showing the inclined dark areas of brightness in picture.
Optionally, in one embodiment of the invention, the value range of the compositing area width of Y in a second direction
For 0mm~3mm, including right end point value, on the basis of alleviating the luminance difference of the second area and the first area,
The area for reducing the second area, increases the area of the first area, to increase the light of the backlight module outgoing
Light intensity branch the uniformity.
Based on any of the above embodiments, in an embodiment of the invention, as shown in Figure 1, first blast
Second collective optics 22 can be only arranged in the second area of film 20, with the technology difficulty of simplification first brightness enhancement film 20,
In another embodiment of the present invention, as shown in figure 3, the second area of first brightness enhancement film 20 also can be set multiple
Two collective optics 22, to improve the spotlight effect of the second area, to improve the light intensity of the second area, this hair
It is bright to this and without limitation.It should be noted that in embodiments of the present invention, 20 second area of the first brightness enhancement film setting
The quantity of second collective optics 22 is more, and the spotlight effect of the second area is better, the light of the second area outgoing
Intensity is stronger, and light intensity distribution is also more uniform, in the display picture formed using the emergent ray of the backlight module, shows picture
The quality in face is better.
Based on any of the above embodiments, in one embodiment of the invention, the backlight module application is aobvious
Showing device is the display device of small-medium size no more than 14 cun, in embodiments of the present invention, the size of the LED light source between
Between 0.1mm-0.5mm (the i.e. described LED light source in a second direction the width of Y value range be 0.1mm-0.5mm), it is adjacent
The value range of the distance between LED light source is 1mm-1.5mm, then under prior art ability condition, the compositing area edge
The value range of the width of second direction Y be 0mm~3mm, including right end point value, but the present invention to this and without limitation,
In the other embodiments of invention, the value range of the compositing area width of Y in a second direction can also be other value models
It encloses, specific the distance between the technological ability of backlight module, the size of LED light source, adjacent LED light source and the display device of regarding
Depending on situations such as size.
On the basis of the above embodiments, in one embodiment of the invention, first collective optics 21 are along second
The value range of the width of direction Y is 24 μm~40 μm, including endpoint value, the number of the first collective optics of the first area
Value range is 75-125, including right end point value, to subtract on the basis of improving the light intensity of the first area as far as possible
The technology difficulty of small first collective optics 21.
On the basis of the above embodiments, in one embodiment of the invention, the second optically focused member of the second area
The value range of the number of part 22 is 1-125, including endpoint value, the present invention to this and without limitation, specifically depend on the circumstances.
Continue as shown in Figure 3, it is assumed that the width of the edge obfuscation region of display device Y in a second direction is S, i.e. S
The compositing area is indicated along the width of the second direction Y, then: the number N of second collective optics 22 is equal to S/W,
In, W indicates second collective optics 22 along the width of the second direction Y.
Optionally, on the basis of the above embodiments, in one embodiment of the invention, second collective optics 22
Width and first collective optics 21 along the second direction Y are utilized along the of same size of the second direction Y with improving
The uniformity of the Luminance Distribution for the display picture that the emergent ray of the backlight module is formed, improves the display matter of display picture
Amount.
Continue so that the display device that the backlight module is applied is the small-medium size display device no more than 14 cun as an example, then
When second collective optics 22 along the second direction Y width and first collective optics 21 along the second direction Y
It is of same size when, second collective optics 22 in a second direction the width of Y value range be 24 μm~40 μm, including end
The number value range of point value, the second collective optics 22 of the second area is 75-125, including right end point value, to the greatest extent may be used
The light intensity that the second area can be improved, reduces the light intensity difference between the second area and the first area
On the basis of, do not increase the technology difficulty of second collective optics 22 excessively, but the present invention is to this and without limitation, it is specific to regard
Depending on situation.
Based on any of the above embodiments, in one embodiment of the invention, as shown in figure 4, the brightness enhancement film
Further include: positioned at first brightness enhancement film 20 towards the second brightness enhancement film 30 of 10 side of backlight, to further increase
State the transmission amount of the light of the outgoing of backlight 10.
Optionally, in embodiments of the present invention, second brightness enhancement film 30 including third region and surrounds the third area
The fourth region in domain, as shown in figure 5, the third region of second brightness enhancement film 30 has that multiple Y in a second direction extend
Three collective optics 31, wherein the second direction Y is vertical with the first direction X.
In embodiments of the present invention, there are multiple Y in a second direction to extend in the third region of second brightness enhancement film 30
Third collective optics 31, to further increase the light intensity of the first area outgoing, in the display picture of display same brightness
When face, the power consumption of the backlight 10 is reduced.
On the basis of the above embodiments, in one embodiment of the invention, continue as shown in figure 5, described second increases
Also the third collective optics 31 that there are the fourth region of bright film 30 multiple Y in a second direction to extend, to improve the second area
The light intensity of outgoing reduces the power consumption of the backlight 10 when showing the display picture of same brightness.
Optionally, based on any of the above embodiments, in one embodiment of the invention, the third optically focused member
The refractive index of part 31 is greater than the refractive index of air, specifically, the third collective optics 31 can be prism, but the present invention couple
This and without limitation, in other embodiments of the invention, the third collective optics 31 can also be other shapes optically focused
Structure specifically depends on the circumstances.
In another embodiment of the present invention, as shown in fig. 6, the fourth region of second brightness enhancement film 30 has at least
One the 4th collective optics 32 extended in a second direction, the refractive index of the 4th collective optics 32 are greater than the refraction of air
Rate so that the 4th collective optics 32 can the light to directive its plane of incidence there is spotlight effect, improve described second
The light intensity in region, and under the same terms, the irradiation of same light beam, the emergent ray of the 4th collective optics 32 is pre-
If the hot spot that plane is formed is less than the hot spot that the emergent ray of the third collective optics 31 is formed in the preset plane, with
So that the spotlight effect of the 4th collective optics 32 is greater than the spotlight effect of the third collective optics 31, thus described in reducing
Difference between the light intensity of second area emergent ray and the light intensity of first area emergent ray, alleviating includes the back
The fringe region of the display picture of the display device of the optical mode group phenomenon partially dark compared with the central area of display picture, improves display picture
The display quality in face.
On the basis of the above embodiments, in one embodiment of the invention, the 4th area of second brightness enhancement film 30
The 4th collective optics can be only arranged in domain, as shown in fig. 6, with the technology difficulty of simplification second brightness enhancement film 30；?
In another embodiment of the invention, multiple 4th collective optics are can be set in the fourth region of second brightness enhancement film 30, such as
Shown in Fig. 7, to improve the spotlight effect of the fourth region, but the present invention is to this and without limitation, specifically depends on the circumstances.
Based on any of the above embodiments, in one embodiment of the invention, the 4th collective optics 32
Refractive index is greater than the refractive index of the third collective optics 31, so that the spotlight effect of the 4th collective optics 32 is greater than institute
State the spotlight effect of third collective optics 31；In the present embodiment, the 4th collective optics 32 and the third collective optics
31 shape may be the same or different, the present invention to this and without limitation, as long as can guarantee the 4th collective optics
32 spotlight effect is greater than the spotlight effect of the third collective optics 31.
In another embodiment of the present invention, the refraction of the 4th collective optics 32 and the third collective optics 31
Rate is identical, and the 4th collective optics 32 are different from the shape of the third collective optics 31, so that the 4th optically focused is first
The spotlight effect of part 32 is greater than the spotlight effect of the third collective optics 31.
On the basis of the above embodiments, in one embodiment of the invention, the material of the 4th collective optics 32
It is identical as the material of the third collective optics 31, so that the 4th collective optics 32 and the third collective optics 31 can
To complete in same step process, simplifies the process flow of the backlight module, reduce the cost of the backlight module.
Based on any of the above embodiments, in one embodiment of the invention, the third collective optics 31 are
Prism, the 4th collective optics 32 are convex lens, but the present invention is to this and without limitation, in the other embodiment of the present invention
In, the third collective optics 31 and the 4th collective optics 32 can also be other shapes, as long as guaranteeing that the described 4th is poly-
The spotlight effect of optical element 32 is greater than the spotlight effect of the third collective optics 31.
Based on any of the above embodiments, in one embodiment of the invention, the first area is described
Orthographic projection and the third area coincidence in two brightness enhancement films 30, so that the first area and the third region are strictly right
It answers, orthographic projection of the second area in second brightness enhancement film 30 is overlapped with the fourth region, so that described second
Region and the fourth region are strictly corresponding, but the present invention is to this and without limitation, in other embodiments of the invention, described
Orthographic projection of the first area in second brightness enhancement film 30 can not also be with the third area coincidence, and such as first area exists
Orthographic projection in second brightness enhancement film 30 is slightly larger than the third region or the slightly smaller than described third region, specifically optionally and
It is fixed.
It should be noted that the second area of first brightness enhancement film 20 has extremely in alternative embodiment of the invention
The fourth region of few second collective optics 22, second brightness enhancement film 30 has multiple third collective optics 31, to mention
The light intensity in high rim region reduces the basis of the light-intensity difference of the second area and the first area emergent ray
On, the equalization of intensity of the second area is improved, avoids the light of the second area outgoing from excessively concentrating, reduces benefit
The Luminance Distribution that the fringe region of the display picture for the display device that picture is shown is carried out with the light that the backlight module is emitted is equal
Even property.
It should also be noted that, although the various embodiments described above are to include the first brightness enhancement film 20 with the brightness enhancement film or wrap simultaneously
For including the first brightness enhancement film 20 and the second brightness enhancement film 30, the backlight module is described, but the present invention does not do this
Limit, in other embodiments of the invention, the brightness enhancement film can also include more layers brightness enhancement film, specifically optionally and
It is fixed.
Based on any of the above embodiments, in one embodiment of the invention, as shown in Figure 1, the backlight
10 include: substrate 11 and are fixed on multiple LED light sources 12 of the substrate 11 towards brightness enhancement film side, the multiple LED light
Source 12 is arranged in array, and optionally, the LED light source 12 is blue-ray LED, but the present invention is to this and without limitation, in the present invention
Other embodiments in, the LED light source 12 can also for issue other color lights LED, as red-light LED, green light LED or
Purple LED etc., specifically depends on the circumstances.Below by taking the LED light source is blue-ray LED as an example, the backlight module is said
It is bright.
Based on any of the above embodiments, in one embodiment of the invention, as shown in figure 8, the backlight mould
Group further include:
Color conversion layer 40 between the brightness enhancement film and the backlight 10, the color conversion layer 40 is used for will
The light that the light that the backlight 10 is emitted is converted into multiple color projects, and the light of the multiple color is mixed to form white
Light, in order to which the white light that the display device can use the backlight module outgoing carries out the display of picture.Optionally,
The color conversion layer is fluorescent film.
Specifically, when the backlight 10 include multiple blue-ray LEDs when, the color conversion layer include red fluorescence powder and
The blue ray part that the LED light source issues is converted into red light and green light by green emitting phosphor, so with indigo plant
Coloured light line is mixed to form white light.It should be noted that when the backlight 10 includes multiple red-light LEDs or purple LED, accordingly
, the type for the fluorescent powder for including in the color conversion layer 40 can also change, and specifically depend on the circumstances.
Based on any of the above embodiments, in one embodiment of the invention, as shown in figure 9, the backlight mould
Group further include: the diffusion barrier 50 between the color conversion layer 40 and the brightness enhancement film, with right using the diffusion barrier 50
The emergent ray of the color conversion layer 40 is diffused, and improves the uniformity of the emergent ray of the backlight module.
Correspondingly, the embodiment of the invention also provides a kind of display devices, as shown in Figure 10, on which includes:
State backlight module 100 provided by any embodiment and the display panel 200 positioned at 100 light emission side of backlight module.
Optionally, in one embodiment of the invention, the display panel 200 is liquid crystal display panel, but of the invention
To this and without limitation, as long as the display panel 200 is passive type display panel.
On the basis of the above embodiments, in one embodiment of the invention, the display panel 200 have display
Function, in another embodiment of the present invention, the display panel 200 not only have display function, also have touch function,
The present invention to this and without limitation, specifically depends on the circumstances.
To sum up, in backlight module and display device provided by the embodiment of the present invention, the brightness enhancement film includes the first blast
Film, first brightness enhancement film include first area and the second area around the first area, first brightness enhancement film
First area has multiple the first collective optics extended in a first direction, and the second area of first brightness enhancement film has at least
One the second collective optics extended in a first direction, the refractive index of second collective optics are greater than the refractive index of air, with
Allow the light of the second collective optics second collective optics described in directive there is spotlight effect, improves described second
The light intensity in region, and the same terms, same light beam irradiation under, the emergent rays of second collective optics is default
Plane forms hot spot and is less than the hot spot that the emergent ray of first collective optics is formed in the preset plane, so that institute
The spotlight effect for stating the second collective optics is greater than the spotlight effect of first collective optics, goes out to reduce the second area
The difference between the light intensity of light and the light intensity of first area emergent ray is penetrated, alleviating includes the aobvious of the backlight module
The fringe region of the display picture of the showing device phenomenon partially dark compared with the central area of display picture, improves the display matter of display picture
Amount.
Various pieces are described in a progressive manner in this specification, and what each some importance illustrated is and other parts
Difference, same and similar part may refer to each other between various pieces.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to embodiment illustrated herein, and is to fit to consistent with the principles and novel features disclosed in this article
Widest scope.
Claims (13)
1. a kind of backlight module characterized by comprising
Backlight, the backlight is for generating emergent ray；
Positioned at the brightness enhancement film of the backlight light emission side, the brightness enhancement film includes the first brightness enhancement film, and first brightness enhancement film includes
First area and second area around the first area, the first area of first brightness enhancement film have multiple along first
There is the second area of the first collective optics that direction extends, first brightness enhancement film at least one to extend along the first direction
The second collective optics, the refractive index of second collective optics is greater than the refractive index of air, and in the same terms, same light beam
Irradiation under, the emergent rays of second collective optics is less than first collective optics in the hot spot that preset plane is formed
The hot spot that emergent ray is formed in the preset plane.
2. backlight module according to claim 1, which is characterized in that first collective optics are prism, described the
Two collective optics are convex lens.
3. backlight module according to claim 1, which is characterized in that the second area includes multiple compositing areas, institute
Stating multiple compositing areas includes the first compositing area and the second compositing area being oppositely arranged, first compositing area and described
Second compositing area is located at the not ipsilateral of the first area, and the value range of the width of the compositing area in a second direction
For 0mm~3mm, including right end point value, wherein the second direction is perpendicular to the first direction.
4. backlight module according to claim 3, which is characterized in that second collective optics are along the second direction
Width is with first collective optics along the of same size of the second direction.
5. backlight module according to claim 3, which is characterized in that the width of second collective optics in a second direction
Value range is 24 μm~40 μm, including endpoint value；
The number N of second collective optics is equal to S/W, wherein S indicates the compositing area along the width of the second direction
Degree, W indicate second collective optics along the width of the second direction.
6. backlight module according to claim 1-5, which is characterized in that the brightness enhancement film further include:
Positioned at first brightness enhancement film towards the second brightness enhancement film of the backlight side, second brightness enhancement film includes third area
Domain and the fourth region around the third region, the third region of second brightness enhancement film has multiple prolongs in a second direction
The third collective optics stretched；Wherein, the second direction is vertical with the first direction.
7. backlight module according to claim 6, which is characterized in that the fourth region of second brightness enhancement film has multiple
Along second to extension third collective optics.
8. backlight module according to claim 6, which is characterized in that the third collective optics are prism.
9. backlight module according to claim 6, which is characterized in that the fourth region of second brightness enhancement film has at least
One the 4th collective optics extended in a second direction, the refractive index of the 4th collective optics are greater than the refractive index of air, and
Under the same terms, the irradiation of same light beam, the hot spot that the emergent ray of the 4th collective optics is formed in preset plane is small
In the hot spot that the emergent ray of the third collective optics is formed in the preset plane.
10. backlight module according to claim 9, which is characterized in that the 4th collective optics are convex lens.
11. backlight module according to claim 6, which is characterized in that the first area is in second brightness enhancement film
Orthographic projection and the third area coincidence, orthographic projection of the second area in second brightness enhancement film and the 4th area
Domain is overlapped.
12. backlight module according to claim 1, which is characterized in that further include:
Color conversion layer between the brightness enhancement film and the backlight；
Diffusion barrier between the color conversion layer and the brightness enhancement film.
13. a kind of display device characterized by comprising
The described in any item backlight modules of claim 1-12, and the display panel positioned at the backlight module light emission side.
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| CN201811571717.6A CN109407405B (en) | 2018-12-21 | 2018-12-21 | Backlight module and display device |
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| CN201811571717.6A CN109407405B (en) | 2018-12-21 | 2018-12-21 | Backlight module and display device |
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| CN109407405B (en) | 2021-11-19 |
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