CN109188772A - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
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- CN109188772A CN109188772A CN201811275354.1A CN201811275354A CN109188772A CN 109188772 A CN109188772 A CN 109188772A CN 201811275354 A CN201811275354 A CN 201811275354A CN 109188772 A CN109188772 A CN 109188772A
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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)
Abstract
The present invention provides a kind of backlight module and display devices, including Miniature luminous device part array and the first optical diaphragm that Miniature luminous device part array light emission side is arranged in；The surface of first optical diaphragm has multiple first micro-structures and multiple second micro-structures；Projection of the Miniature luminous device part on substrate is Chong Die with projection of first micro-structure on substrate；Projection of the interval region on substrate between the adjacent Miniature luminous device part of any two is Chong Die with projection of second micro-structure on substrate；First micro-structure is different with the shape of the second micro-structure, or, first micro-structure is identical with the shape of the second micro-structure but radius of curvature is different, so that the light-gathering of the second micro-structure is greater than the light-gathering of the first micro-structure, based on this, the brightness for the interval region between Miniature luminous device part that any two can be made adjacent is equal or approximately equal to the brightness of Miniature luminous device part region, so that the brightness of display device is more evenly.
Description
Technical field
The present invention relates to field of display technology, more specifically to a kind of backlight module and display device.
Background technique
Compared with normal image, HDR (High-Dynamic Range, high dynamic range images) have higher color depth,
Wider array of dynamic range and stronger color representation power.Based on this, using LCD (the Liquid Crystal of HDR technology
Display, liquid crystal display) contrast and the performances such as brightness be significantly better than common liquid crystal display, or even can be with OLED
(Organic Light-Emitting Diode, Organic Light Emitting Diode) display is comparable.
But for the miniature LED of use is as the HDR-LCD of light source, since the spacing between miniature LED is larger,
Therefore about 1mm~1.5mm causes the brightness in the region between miniature LED and miniature LED lower, lead to that HDR-LCD's is bright
Degree is uneven.
Summary of the invention
In view of this, using miniature LED as light source to solve the present invention provides a kind of backlight module and display device
HDR-LCD brightness irregularities the problem of.
To achieve the above object, the invention provides the following technical scheme:
A kind of backlight module, including substrate, Miniature luminous device part array and setting go out in the Miniature luminous device part array
First optical diaphragm of light side, the Miniature luminous device part be arranged in the first surface of the substrate and with the drive on the substrate
Dynamic circuit electrical connection；
The surface of first optical diaphragm has multiple first micro-structures and multiple second micro-structures；
The projection of the Miniature luminous device part on the substrate and one or more first micro-structures are in the base
Projection overlapping on plate；The projection of interval region on the substrate between the adjacent Miniature luminous device part of any two
It is Chong Die with the projection of one or more second micro-structures on the substrate；
The shape of first micro-structure and second micro-structure is different, alternatively, first micro-structure and described the
The shape of two micro-structures is identical but radius of curvature is different, so that the light-gathering of second micro-structure is greater than first micro-structure
Light-gathering.
Optionally, first micro-structure is different with the shape of second micro-structure；
Also, the shape of first micro-structure is triangular pyramid, and the shape of second micro-structure is convex lens shape；
Alternatively, the shape of first micro-structure is concavees lens shape, the shape of second micro-structure is convex lens shape.
Optionally, first micro-structure is identical with the shape of second micro-structure, first micro-structure and described
The shape of second micro-structure is all concavees lens shape；
Also, the radius of curvature of first micro-structure is less than the radius of curvature of second micro-structure.
Optionally, the width of the Miniature luminous device part is M, between adjacent first micro-structure of any two between
Away from for a, then the number of first micro-structure Chong Die with the projection of each Miniature luminous device part on the substrate is
M/a, and the numberical range of the M/a is 12~21, including endpoint value；
The width of the interval region is N, and the spacing between adjacent second micro-structure of any two is b, then with
The number of second micro-structure of the projection overlapping of each interval region on the substrate is N/b, and the N/b
Range is 25~63, including endpoint value.
Optionally, further include the second optical film between the Miniature luminous device part and first optical diaphragm
Piece.
Optionally, the surface of second optical diaphragm has multiple third micro-structures and multiple 4th micro-structures；
The projection of the Miniature luminous device part on the substrate and one or more third micro-structures are in the base
Projection overlapping on plate；The projection and one of the interval region of the adjacent Miniature luminous device part of any two on the substrate
The projection overlapping of a or multiple 4th micro-structures on the substrate；
The third micro-structure is identical with the shape of the 4th micro-structure；Alternatively, the third micro-structure and described
The shapes of four micro-structures is different, alternatively, the third micro-structure is identical with the shape of the 4th micro-structure but radius of curvature not
Together.
Optionally, the shape of the third micro-structure is identical as the shape of first micro-structure, the 4th micro-structure
Shape it is identical as the shape of second micro-structure.
Optionally, the shape of the third micro-structure and the 4th micro-structure is all concavees lens shape.
Optionally, the width of the Miniature luminous device part is M, between the adjacent third micro-structure of any two between
Away from for c, then the number of the third micro-structure Chong Die with the projection of each Miniature luminous device part on the substrate is
M/c, and the numberical range of the M/c is 12~21, including endpoint value；
The width of the interval region is N, and the spacing between adjacent the 4th micro-structure of any two is d, then with
The number of the 4th micro-structure of the projection overlapping of each interval region on the substrate is N/d, and the N/d
Numberical range is 25~63, including endpoint value.
Optionally, first optical diaphragm and second optical diaphragm are all the diaphragm that adds lustre to.
A kind of display device, including as above described in any item backlight modules.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Backlight module provided by the present invention and display device, not due to the shape of the first micro-structure and the second micro-structure
Together, alternatively, the first micro-structure is identical with the shape of the second micro-structure but radius of curvature is different, so that the light-gathering of the second micro-structure
Greater than the light-gathering of the first micro-structure, therefore, the adjacent miniature hair of the second micro-structure corresponding region i.e. any two can be increased
It is bright to reduce the first micro-structure corresponding region, that is, Miniature luminous device part region for the brightness of interval region between optical device
Degree, so that the brightness of the interval region between the adjacent Miniature luminous device part of any two is equal or approximately equal to miniature hair
The brightness of optical device region, so that the brightness of display device is more evenly.
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
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 2 is the overlooking structure diagram of the first optical diaphragm shown in FIG. 1；
Fig. 3 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 4 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 5 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 6 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 7 is the overlooking structure diagram of the second optical diaphragm shown in fig. 6；
Fig. 8 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Fig. 9 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of the section structure of display device provided in an embodiment of the present 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.
The embodiment of the invention provides a kind of backlight module, Fig. 1 is one kind of backlight module provided in an embodiment of the present invention
The schematic diagram of the section structure, the backlight module include Miniature luminous device part array and are arranged in Miniature luminous device part array light emission side
The first optical diaphragm 10.Certainly, the backlight module in the present invention further includes the necessary device such as back frame and flexible circuit board, herein
It repeats no more.
As shown in Figure 1, the first surface of substrate 11 is arranged in Miniature luminous device part array, and electric with the driving on substrate 11
The electrical connection of road (not shown).Wherein, Miniature luminous device part array includes multiple in the i.e. multiple lines and multiple rows arrangement of array arrangement
Miniature luminous device part 12.The driving circuit being correspondingly arranged on each Miniature luminous device part 12 and substrate 11 is electrically connected, so that soft
Property circuit board by driving circuit drive Miniature luminous device part 12 shine.Optionally, the Miniature luminous device in the embodiment of the present invention
Part 12 is miniature LED (Micro-LED).
In the embodiment of the present invention, the light emission side of Miniature luminous device part 12 is arranged in the first optical diaphragm 10, i.e., miniature to shine
Device 12 deviates from the side of substrate 11.First optical diaphragm 10 has multiple first away from a side surface of Miniature luminous device part 12
Micro-structure 101 and multiple second micro-structures 102.Also, the projection of Miniature luminous device part 12 on the substrate 11 and one or more
The projection overlapping of first micro-structure 101 on the substrate 11.Interval region between the adjacent Miniature luminous device part 12 of any two
Projection on the substrate 11 is Chong Die with the projection of one or more second micro-structures 102 on the substrate 11.
As shown in Fig. 2, Fig. 2 is the overlooking structure diagram of the first optical diaphragm 10 shown in FIG. 1, the first optical diaphragm 10
There are one or more first micro-structures 101 including the first microstructured area B1 and the second microstructured area B2, the first microstructured area B1,
Second microstructured area B2 has one or more second micro-structures 102.First microstructured area B1 and Miniature luminous device part 12 are one by one
It is correspondingly arranged, i.e. the projection of the first micro-structure 101 in a first microstructured area B1 on the substrate 11 is miniature luminous with one
The projection overlapping of device 12 on the substrate 11.Interval region between second microstructured area B2 and adjacent Miniature luminous device part 12
It is correspondingly arranged, i.e. micro- adjacent with any two of the projection of the second micro-structure 102 in the second microstructured area B2 on the substrate 11
Interval region overlapping between type luminescent device 12.
In the embodiment of the present invention, the first micro-structure 101 is different with the shape of the second micro-structure 102, alternatively, the first micro-structure
101 is identical with the shape of the second micro-structure 102 but radius of curvature is different, so that the light-gathering of the second micro-structure 102 is greater than first
The light-gathering of micro-structure 101.
Since the light-gathering of the second micro-structure 102 is greater than the light-gathering of the first micro-structure 101, second can be increased
The brightness of interval region between the adjacent Miniature luminous device part 12 of 102 corresponding regions of micro-structure, that is, any two reduces first
101 corresponding regions of micro-structure, that is, 12 region of Miniature luminous device part brightness, so that the miniature hair that any two are adjacent
The brightness of interval region between optical device 12 is equal or approximately equal to the brightness of 12 region of Miniature luminous device part, and then makes
Obtain the brightness of display device more evenly.
It should be noted that the projected area of the first microstructured area B1 can be equal to miniature shine in the embodiment of the present invention
The projected area of device 12 can also be greater than the projected area of Miniature luminous device part 12, to reduce Miniature luminous device as far as possible
The display brightness of 12 corresponding region of part, improves the brightness uniformity of display device.
Optionally, the first micro-structure 101 is different with the shape of the second micro-structure 102.
Still optionally further, as depicted in figs. 1 and 2, the shape of the first micro-structure 101 is triangular pyramid, the second micro-structure
102 shape is convex lens shape.Since the micro-structure of convex lens shape has the function of assembling light, the micro-structure tool of triangular pyramid
There are divergent rays, therefore, the light-gathering of the second micro-structure 102 is greater than the light-gathering of the first micro-structure 101, i.e., second is micro-
The performance that structure 102 assembles light is greater than the performance that the first micro-structure 101 assembles light.
When being emitted from light is from the first micro-structure 101 of triangular pyramid, since the refractive index of the first optical diaphragm 10 is big
In the refractive index of air, therefore, the angle of emergence is greater than incidence angle, and light can be deviated to 101 surrounding of the first micro-structure, i.e., first micro- knot
Structure 101 can dissipate light, so as to reduce the brightness of 101 top of the first micro-structure.When light is from convex lens shape
The second micro-structure 102 at be emitted when, under the converging action of the second micro-structure 102 of convex lens shape, light can be micro- to second
The off-centring of structure 102, so as to which the light at 102 edge of the second micro-structure to centre convergence, and then can be increased by
The brightness of two micro-structures, 102 top.
Brightness due to above the first micro-structure 101 being 12 top of Miniature luminous device part is reduced, in the second micro-structure 102
Side is that the brightness above the interval region between Miniature luminous device part 12 is increased, it is thereby possible to reduce Miniature luminous device part 12
The luminance difference above interval region between top and Miniature luminous device part 12, so that display device is entirely shown
The brightness in region is more uniform, and then the brightness uniformity of display device can be improved.
Still optionally further, as shown in figure 3, Fig. 3 is another cross-section structure of backlight module provided in an embodiment of the present invention
Schematic diagram, the shape of the first micro-structure 101 are concavees lens shape, and the shape of the second micro-structure 102 is convex lens shape.Similarly, since
The micro-structure of convex lens shape has the function of convergence light, and the micro-structure of concavees lens shape has the function of divergent rays, therefore, the
The light-gathering of two micro-structures 102 is greater than the light-gathering of the first micro-structure 101.
When being emitted from light is from the first micro-structure 101 of concavees lens shape, in the hair of the first micro-structure 101 of concavees lens shape
It dissipates under effect, light can be deviated to 101 surrounding of the first micro-structure, so as to reduce the brightness of 101 top of the first micro-structure.When
When light is emitted from the second micro-structure 102 of convex lens shape, under the converging action of the second micro-structure 102 of convex lens shape,
Light can to the off-centring of the second micro-structure 102, so as to by the light at 102 edge of the second micro-structure to centre convergence,
And then the brightness of 102 top of the second micro-structure can be increased.
Brightness due to above the first micro-structure 101 being 12 top of Miniature luminous device part is reduced, in the second micro-structure 102
Side is that the brightness above the interval region between Miniature luminous device part 12 is increased, it is thereby possible to reduce Miniature luminous device part 12
The luminance difference above interval region between top and Miniature luminous device part 12, so that display device is entirely shown
The brightness in region is more uniform, and then the brightness uniformity of display device can be improved.
Also, the divergence of beam due to the effect of the divergence of beam of the micro-structure of concavees lens shape better than the micro-structure of triangular pyramid
Effect, therefore, structure shown in Fig. 3 compared with structure shown in FIG. 1, be more advantageous to reduce the top of Miniature luminous device part 12 with it is micro-
The luminance difference above interval region between type luminescent device 12 is more advantageous to the brightness uniformity for improving display device.
Optionally, the first micro-structure 101 is identical with the shape of the second micro-structure 102, but the radius of curvature of the two is different.
Still optionally further, as shown in figure 4, Fig. 4 is another cross-section structure of backlight module provided in an embodiment of the present invention
The shape of schematic diagram, the first micro-structure 101 is concavees lens shape, and the shape of the second micro-structure 102 is also concavees lens shape, still, the
Radius of curvature of the radius of curvature of one micro-structure 101 less than the second micro-structure 102.
Since the radius of curvature of the first micro-structure 101 is smaller, the radius of curvature of the second micro-structure 102 is larger, therefore, first
The astigmatism of micro-structure 101 is greater than the astigmatism of the second micro-structure 102, i.e. it is micro- to be greater than first for the light-gathering of the second micro-structure 102
The light-gathering of structure 101.
When being emitted from light is from the first micro-structure 101 of concavees lens shape, in the hair of the first micro-structure 101 of concavees lens shape
It dissipates under effect, light can be deviated to 101 surrounding of the first micro-structure, so as to reduce the brightness of 101 top of the first micro-structure.When
When light is emitted from the second micro-structure 102 of concavees lens shape, under the disperse function of the second micro-structure 102 of concavees lens shape,
Light can also be deviated to the surrounding of the second micro-structure 102.But since the offset of the light of the second micro-structure 102 outgoing is less than the
The offset of the light of one micro-structure 101 outgoing, therefore, the light of the first micro-structure 101 outgoing can more be displaced to second
102 top of micro-structure, so as to increase the brightness of 102 top of the second micro-structure.
Brightness due to above the first micro-structure 101 being 12 top of Miniature luminous device part is reduced, in the second micro-structure 102
Side is that the brightness above the interval region between Miniature luminous device part 12 is increased, it is thereby possible to reduce Miniature luminous device part 12
The luminance difference above interval region between top and Miniature luminous device part 12, so that display device is entirely shown
The brightness in region is more uniform, and then the brightness uniformity of display device can be improved.
Also, since the first micro-structure 101 is identical with the shape of the second micro-structure 102, with Fig. 3 and shown in FIG. 1
Structure is compared, and the production process of structure shown in Fig. 4 is simpler, only need to form the second micro-structure on the first optical diaphragm 10
After 102, being finely adjusted to the radius of curvature of the second micro-structure 102 in the first microstructured area B1 can be in the first microstructured area B1
The first micro-structure 101 of interior formation.
It should be noted that in the embodiment of the present invention, the second micro-structure 102 first can be formed in membrane surface, then to the
Two micro-structures 102 perform etching to form the first micro-structure 101, can also form first micro- knot in the first microstructured area B1 respectively
Structure 101 forms the second micro-structure 102 in the second microstructured area B2, and the present invention is not limited to this.
Certainly, the shape of the first micro-structure 101 in the present invention and the second micro-structure 102 is not limited in Fig. 2 to Fig. 4 institute
The shape shown, in other embodiments, the shape of the first micro-structure 101 and the second micro-structure 102 can also all be concavees lens shape,
It can also all be triangular pyramid, can also be wavy microstructure etc., as long as its light-gathering for meeting the second micro-structure 102 is big
In the light-gathering of the first micro-structure 101.
In the embodiment of the present invention, it is assumed that the width of Miniature luminous device part 12 is M, the first adjacent micro-structure of any two
Spacing between 101 is a, then first micro-structure 101 Chong Die with the projection of each Miniature luminous device part 12 on the substrate 11
Number is M/a, it is assumed that the width of the interval region between adjacent Miniature luminous device part 12 is N, adjacent second micro- of any two
Spacing between structure 102 is b, then of second micro-structure 102 Chong Die with the projection of each interval region on the substrate 11
Number is N/b, wherein 0.1mm≤M≤0.5mm, 1mm≤N≤1.5mm, 24 μm≤a≤40 μm, and if the numerical value model of a=b, M/a
Enclosing is 12~21, including endpoint value, and the range of N/b is 25~63, including endpoint value.
That is, the number range of first micro-structure 101 Chong Die with the projection of each Miniature luminous device part 12 on the substrate 11
It is 12~21, the of the projection overlapping of the interval region between the Miniature luminous device part 12 adjacent with any two on the substrate 11
The number range of two micro-structures 102 is 25~63.
It should be noted that the first optical diaphragm 10 in the embodiment of the present invention includes but are not limited to Miniature luminous device part
The diffuser plate of 12 tops, add lustre to diaphragm or complex optics diaphragm etc..That is, in the embodiment of the present invention, the first optical diaphragm
10 can be arranged close to Miniature luminous device part 12, also can have other between the first optical diaphragm 10 and Miniature luminous device part 12
Optical diaphragm.
Optionally, as shown in figure 5, Fig. 5 is another the schematic diagram of the section structure of backlight module provided in an embodiment of the present invention,
Backlight module in the embodiment of the present invention further includes the second light between Miniature luminous device part 12 and the first optical diaphragm 10
Learn diaphragm 13.
Wherein, the second optical diaphragm 13 includes but are not limited to that the diffuser plate of the top of Miniature luminous device part 12, add lustre to diaphragm
Or complex optics diaphragm etc..Optionally, the first optical diaphragm 10 and the second optical diaphragm 13 are all the diaphragm that adds lustre to.Also, second
13 surface of optical diaphragm can have micro-structure, can also not have micro-structure, i.e., as shown in figure 5, second optical diaphragm 13
Surface is even curface.
Due to having the second optical diaphragm 13 between Miniature luminous device part 12 and the first optical diaphragm 10, Ke Yitong
It crosses the light that the second optical diaphragm 13 issues Miniature luminous device part 12 to be diffused, is incident on the first optical diaphragm to improve
The uniformity of light on 10, to further decrease the interval between 12 top of Miniature luminous device part and Miniature luminous device part 12
The luminance difference of overlying regions improves the brightness uniformity of display device.
Optionally, the second optical diaphragm 13 has multiple third micro-structures away from a side surface of Miniature luminous device part 12
103 and multiple 4th micro-structures 104.Also, the projection of Miniature luminous device part 12 on the substrate 11 and one or more thirds are micro-
The projection overlapping of structure 103 on the substrate 11；The interval region of the adjacent Miniature luminous device part 12 of any two is on the substrate 11
Projection it is Chong Die with the projection on the substrate 11 of the 4th micro-structures 104 of one or more.
In the embodiment of the present invention, third micro-structure 103 is identical with the shape of the 4th micro-structure 104, alternatively, third micro-structure
103 is different with the shape of the 4th micro-structure 104, alternatively, third micro-structure 103 is identical but bent with the shape of the 4th micro-structure 104
Rate radius is different, to promote its diffusivity etc. by the micro-structure on the second optical diaphragm 13.
Optionally, as shown in Figure 6 and Figure 7, Fig. 6 is that another cross-section structure of backlight module provided in an embodiment of the present invention shows
It is intended to, Fig. 7 is the overlooking structure diagram of the second optical diaphragm 13 shown in fig. 6, third micro-structure 103 and the 4th micro-structure
104 shape is identical, and the two is all concavees lens shape, and the radius of curvature of the two is identical.
As shown in fig. 7, the second optical diaphragm 13 includes third microstructured area B3 and the 4th microstructured area B4, third micro-structure
Area B3 has one or more third micro-structures 103, and the 4th microstructured area B4 has one or more 4th micro-structures 104.The
Three microstructured area B3 are arranged in a one-to-one correspondence with Miniature luminous device part 12, i.e. third micro-structure in a third microstructured area B3
103 projection on the substrate 11 is Chong Die with the projection of a Miniature luminous device part 12 on the substrate 11.4th microstructured area B4 with
Interval region between adjacent Miniature luminous device part 12 is correspondingly arranged, i.e. the 4th micro-structure 104 in the 4th microstructured area B4
Interval region overlapping between the Miniature luminous device part 12 adjacent with any two of projection on the substrate 11.
Since the third micro-structure 103 of concavees lens shape and the 4th micro-structure 104 can play the role of divergent beams, because
This, the light beam in the brighter region in 12 top of Miniature luminous device part can be broken up, be incident on first so as to further increase
The uniformity of light on optical diaphragm 10, and then 12 top of Miniature luminous device part and Miniature luminous device part can be further decreased
The luminance difference above interval region between 12, improves the brightness uniformity of display device.
Optionally, the shape of third micro-structure 103 and the 4th micro-structure 104 is different, alternatively, third micro-structure 103 and the
The shape of four micro-structures 104 is identical but radius of curvature is different.
Still optionally further, the shape of third micro-structure 103 is identical as the shape of the first micro-structure 101, the 4th micro-structure
104 shape is identical as the shape of the second micro-structure 102.As shown in figure 8, Fig. 8 is backlight module provided in an embodiment of the present invention
Another the schematic diagram of the section structure, the shape of the first micro-structure 101 is triangular pyramid, and the shape of the second micro-structure 102 is convex lens
Mirror shape, and the shape of third micro-structure 103 is triangular pyramid, the shape of the 4th micro-structure 104 is convex lens shape.
Certainly, the present invention is not limited to this.As shown in figure 9, Fig. 9 is the another of backlight module provided in an embodiment of the present invention
One the schematic diagram of the section structure, the shape of the first micro-structure 101 are concavees lens shape, and the shape of the second micro-structure 102 is convex lens shape,
The shape of third micro-structure 103 and the 4th micro-structure 104 is all concavees lens shape, but third micro-structure 103 and the 4th micro-structure 104
Radius of curvature it is different.
In the first optical diaphragm 10 with the first micro-structure 101 and the second micro-structure 102 and there is third micro-structure
103 and the 4th micro-structure 104 the second optical diaphragm 13 double action under, can further decrease on Miniature luminous device part 12
The luminance difference above interval region between side and Miniature luminous device part 12, so that the entire viewing area of display device
The brightness in domain is more uniform, and then the brightness uniformity of display device can be improved.
In the embodiment of the present invention, it is assumed that the width of Miniature luminous device part 12 is M, the adjacent third micro-structure of any two
Spacing between 103 is c, then the third micro-structure 103 Chong Die with the projection of each Miniature luminous device part 12 on the substrate 11
Number is M/c, it is assumed that the width of the interval region between adjacent Miniature luminous device part 12 is N, adjacent the 4th micro- of any two
Spacing between structure 104 is d, then of fourth micro-structure 104 Chong Die with the projection of each interval region on the substrate 11
Number is N/d, wherein 0.1mm≤M≤0.5mm, 1mm≤N≤1.5mm, 24 μm≤c≤40 μm, and if the number model of c=d, M/c
Enclosing is 12~21, including endpoint value, and the number range of N/d is 25~63, including endpoint value.
In addition, it should be noted that, on the first optical diaphragm 10, except 12 corresponding region i.e. first of Miniature luminous device part is micro-
Structural area B1 has except the first micro-structure 101, other regions all have the second micro-structure 102, i.e., adjacent Miniature luminous device
The fringe region of interval region and the first optical diaphragm 10 between part 12 all has the second micro-structure 102.Optionally, first
Second micro-structure 102 of 10 fringe region of optical diaphragm is convex lens shape, to be improved by the second micro-structure 102 of convex lens shape
The case where display device edge shades.
Equally, on the second optical diaphragm 13, except the corresponding region of Miniature luminous device part 12, that is, third microstructured area B3 has
Except third micro-structure 103, other regions all have the 4th micro-structure 104, i.e., between adjacent Miniature luminous device part 12 between
The fringe region of septal area domain and the second optical diaphragm 13 all has the 4th micro-structure 104.Optionally, 13 side of the second optical diaphragm
4th micro-structure 104 in edge region is also convex lens shape, to improve display device side by the 4th micro-structure 104 of convex lens shape
The case where edge shades.
The embodiment of the invention also provides a kind of display devices, and as shown in Figure 10, Figure 10 is provided in an embodiment of the present invention
The schematic diagram of the section structure of display device, the display device include array substrate 1, color membrane substrates 2, are arranged in 1 and of array substrate
Liquid crystal layer 3 between color membrane substrates 2 and the backlight module 4 that array substrate 1 deviates from 3 side of liquid crystal layer is set, the backlight mould
The backlight module that group 4 provides for any embodiment as above.Optionally, which is HDR-LCD, i.e., using HDR technology
Liquid crystal display.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.Various modifications to these embodiments are to ability
Will be apparent for the professional technician in domain, the general principles defined herein can not depart from it is of the invention
In the case where spirit or scope, realize in other embodiments.Therefore, the present invention be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. a kind of backlight module, which is characterized in that including substrate, Miniature luminous device part array and be arranged in the Miniature luminous device
First optical diaphragm of part array light emission side, the Miniature luminous device part be arranged in the first surface of the substrate and with the base
Driving circuit electrical connection on plate；
The surface of first optical diaphragm has multiple first micro-structures and multiple second micro-structures；
The projection of the Miniature luminous device part on the substrate and one or more first micro-structures are on the substrate
Projection overlapping；The projection and one of interval region on the substrate between the adjacent Miniature luminous device part of any two
The projection overlapping of a or multiple second micro-structures on the substrate；
The shape of first micro-structure and second micro-structure is different, alternatively, first micro-structure and described second micro-
The shape of structure is identical but radius of curvature is different, so that the light-gathering of second micro-structure is greater than the poly- of first micro-structure
Photosensitiveness.
2. backlight module according to claim 1, which is characterized in that first micro-structure and second micro-structure
Shape is different；
Also, the shape of first micro-structure is triangular pyramid, and the shape of second micro-structure is convex lens shape；
Alternatively, the shape of first micro-structure is concavees lens shape, the shape of second micro-structure is convex lens shape.
3. backlight module according to claim 1, which is characterized in that first micro-structure and second micro-structure
Shape is identical, and the shape of first micro-structure and second micro-structure is all concavees lens shape；
Also, the radius of curvature of first micro-structure is less than the radius of curvature of second micro-structure.
4. backlight module according to claim 1, which is characterized in that the width of the Miniature luminous device part be M, any two
Spacing between a adjacent first micro-structure is a, the then throwing with each Miniature luminous device part on the substrate
The number of first micro-structure of shadow overlapping is M/a, and the numberical range of the M/a is 12~21, including endpoint value；
The width of the interval region is N, and the spacing between adjacent second micro-structure of any two is b, then with it is each
The number of second micro-structure of the projection overlapping of the interval region on the substrate is N/b, and the range of the N/b
It is 25~63, including endpoint value.
5. backlight module according to any one of claims 1 to 4, which is characterized in that further include positioned at described miniature luminous
The second optical diaphragm between device and first optical diaphragm.
6. backlight module according to claim 5, which is characterized in that the surface of second optical diaphragm has multiple the
Three micro-structures and multiple 4th micro-structures；
The projection of the Miniature luminous device part on the substrate and one or more third micro-structures are on the substrate
Projection overlapping；The projection of the interval region of the adjacent Miniature luminous device part of any two on the substrate with one or
The projection overlapping of multiple 4th micro-structures on the substrate；
The third micro-structure is identical with the shape of the 4th micro-structure；Alternatively, the third micro-structure and described 4th micro-
The shape of structure is different, alternatively, the third micro-structure is identical with the shape of the 4th micro-structure but radius of curvature is different.
7. backlight module according to claim 6, which is characterized in that the shape of the third micro-structure and described first micro-
The shape of structure is identical, and the shape of the 4th micro-structure is identical as the shape of second micro-structure.
8. backlight module according to claim 6, which is characterized in that the third micro-structure and the 4th micro-structure
Shape is all concavees lens shape.
9. backlight module according to claim 6, which is characterized in that the width of the Miniature luminous device part be M, any two
Spacing between a adjacent third micro-structure is c, the then throwing with each Miniature luminous device part on the substrate
The number of the third micro-structure of shadow overlapping is M/c, and the numberical range of the M/c is 12~21, including endpoint value；
The width of the interval region is N, and the spacing between adjacent the 4th micro-structure of any two is d, then with it is each
The number of the 4th micro-structure of the projection overlapping of the interval region on the substrate is N/d, and the numerical value of the N/d
Range is 25~63, including endpoint value.
10. backlight module according to claim 5, which is characterized in that first optical diaphragm and second optics
Diaphragm is all the diaphragm that adds lustre to.
11. a kind of display device, which is characterized in that including the described in any item backlight modules of claim 1~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275354.1A CN109188772A (en) | 2018-10-30 | 2018-10-30 | A kind of backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811275354.1A CN109188772A (en) | 2018-10-30 | 2018-10-30 | A kind of backlight module and display device |
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| CN201811275354.1A Pending CN109188772A (en) | 2018-10-30 | 2018-10-30 | A kind of backlight module and display device |
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| CN110955083A (en) * | 2019-09-30 | 2020-04-03 | 厦门天马微电子有限公司 | Display device |
| CN113075814A (en) * | 2021-03-25 | 2021-07-06 | Tcl华星光电技术有限公司 | Visual angle diffusion film and display panel |
| CN113488575A (en) * | 2021-03-02 | 2021-10-08 | 达运精密工业股份有限公司 | Light emitting module |
| CN115712214A (en) * | 2022-12-05 | 2023-02-24 | 厦门天马微电子有限公司 | Prism film, backlight module and display device |
| US11655957B2 (en) | 2018-01-30 | 2023-05-23 | Brightview Technologies, Inc. | Microstructures for transforming light having Lambertian distribution into batwing distributions |
| US11822158B2 (en) | 2019-09-11 | 2023-11-21 | Brightview Technologies, Inc. | Back light unit for backlit displays |
| US11906842B2 (en) | 2020-01-24 | 2024-02-20 | Brightview Technologies, Inc. | Optical film for back light unit and back light unit including same |
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Application publication date: 20190111 |