CN109754711A - A kind of backlight module and preparation method thereof, display device - Google Patents
A kind of backlight module and preparation method thereof, display device Download PDFInfo
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Abstract
The invention discloses a kind of backlight modules and preparation method thereof, display device.Backlight module includes backboard, spaced multiple LED and the condensing body being arranged between adjacent LED on the backboard, and at least partly light that the condensing body can be such that the LED being located at around the condensing body issues is converged after injecting from the surface of the condensing body and projected from the condensing body.The backlight module, which is equivalent between adjacent LED, is provided with a point light source, to, it no longer needs to increase setting LED between adjacent LED, it can be under the premise of using less LED number and cost, promote the brightness in region between adjacent LED, the whole light homogeneity out of backlight module is promoted, the utilization rate of LED is improved, is advantageously implemented in laptop and field of television using LED backlight mould group.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of backlight module and preparation method thereof, display device.
Background technique
With the development of display industry, mini light emitting diode (Mini LED) quickly emerges.Mini LED is to be situated between
A kind of transition LED between routine (Normal) LED and miniature (Micro) LED with high efficiency, high reliability, is highlighted
The characteristic fast with the reaction time is spent, and technical difficulty is lower than miniature LED, is readily mass-produced.In the prior art, Mini LED is main
Applied to mobile phone industry, in laptop and field of television almost without application.To find out its cause, mainly due to notebook
The screen size of computer and television set is bigger, and therefore, the backlight module of laptop and television set is needed using a large amount of
Mini LED, to meet the needs of display device is to light homogeneity out.The panel backlit of usual one 5 inches of smart phone is just
9000~10000 Mini LED are needed, then, the Mini LED quantity that television panels backlight needs will reach hundreds of thousands
, not only make the increased costs of backlight module, but also Mini LED quantity also results in the reliability drop of backlight module too much
It is low.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of backlight module and preparation method thereof, display device, made with realizing
With the light homogeneity out for promoting backlight module in the case of less LED number.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of backlight module, including backboard, in the back
Spaced multiple LED and the condensing body being arranged between adjacent LED on plate, the condensing body can make to be located at described poly-
At least partly light that LED around body of light is issued is converged after injecting from the surface of the condensing body and is penetrated from the condensing body
Out.
Optionally, the backlight module further includes the diffusion layer away from the backboard side that the LED is arranged in, described
Condensing body is the protrusion protruded from the one side towards the LED of the diffusion layer towards the backboard direction, the LED hair
At least partly light out is injected in the condensing body from the side of the condensing body, and successively by the condensing body and described
It is projected after diffusion layer, another part light that the LED is issued projects after the diffusion layer.
Optionally, the condensing body is in inverted cone or rounding frustum.
Optionally, the angle of taper of the condensing body is 60 °~90 °.
Optionally, the LED of multiple LED array arrangements, adjacent rows or adjacent two column is staggered.
Optionally, the column pitch of the line space of adjacent rows LED and adjacent two column LED are equal, and the condensing body is described
Orthographic projection side edge of the LED of orthographic projection edge on backboard and surrounding on the backboard.
Optionally, the backboard include substrate and be arranged in the substrate towards it is described diffusion it is laminated on reflection
Layer.
Optionally, the backlight module further includes the protection glue-line being covered on the LED, is arranged on the protection glue-line
There is groove corresponding with the condensing body, the diffusion layer is bonded with the protection glue-line, and the condensing body insertion is corresponding
In the groove.
Optionally, the refractive index of the protection glue-line is less than the refractive index of the condensing body.
Optionally, the light emitting anger angle of the LED is 120 °, and the bottom end of the condensing body is lower than the top of the LED.
In order to solve the above-mentioned technical problem, the embodiment of the invention also provides a kind of preparation methods of backlight module, comprising:
The LED is arranged on the backboard；
Method on the backboard for being formed with the LED using coating forms protection glue-line；
The protection glue-line is handled, the protection glue-line semi-solid preparation is made；
The groove between adjacent LED is formed on the upper surface of the protection glue-line；
Coating forms condensing body and diffusion layer on the protection glue-line, and the condensing body is embedded in the groove.
In order to solve the above-mentioned technical problem, the embodiment of the invention also provides a kind of display device, including it is above-described
Backlight module.
The backlight module that the embodiment of the present invention proposes, by the way that condensing body is arranged between adjacent LED, and condensing body can
So that the light-emitting surface of convergence and autohemagglutination body of light projects after the side for the light autohemagglutination body of light that LED adjacent thereto is issued is injected,
It is equivalent to be provided with a point light source between the i.e. adjacent LED in optically focused body position in this way, thus, it is no longer necessary to adjacent
Increase actual LED between LED, the area between adjacent LED can be promoted under the premise of using less LED number and cost
The emitting brightness in domain promotes the whole light homogeneity that goes out of backlight module and is advantageously implemented to improve the utilization rate of LED in pen
Remember this computer and field of television using LED backlight mould group.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the cross section structure schematic diagram of first embodiment of the invention backlight module；
Fig. 2 is the light path schematic diagram of backlight module shown in Fig. 1；
Fig. 3 is the overlooking structure diagram of backlight module shown in Fig. 1；
Fig. 4 is the detailed light path schematic diagram of backlight module shown in Fig. 1；
The light path schematic diagram that Fig. 5 is the angle of taper of condensing body when being 60 °；
The light path schematic diagram that Fig. 6 is the angle of taper of condensing body when being 90 °；
Fig. 7 is that the structural schematic diagram after LED is formed in backlight module forming process；
Fig. 8 is that the structural schematic diagram after groove is formed in backlight module forming process.
Description of symbols:
1-backboard；11-substrates；12-reflecting layer；
2—LED；3-diffusion layers；31-condensing bodies；
32-first areas；5-protection glue-lines；51-grooves.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Technology contents of the invention will be discussed in detail by specific embodiment below.
First embodiment:
Fig. 1 is the cross section structure schematic diagram of first embodiment of the invention backlight module.The backlight module includes backboard 1 and more
A LED 2, multiple LED 2 are arranged at each interval on backboard 1.Backlight module further includes that gathering between adjacent LED 2 is arranged in
Body of light 31.Condensing body 31 can be such that the LED (LED adjacent with condensing body 31) being located at around condensing body 31 issues at least partly
The light-emitting surface 311 of convergence and autohemagglutination body of light 31 projects after the surface of light autohemagglutination body of light 31 is injected.In Fig. 1, backlight module
Straight up, in order to guarantee light that autohemagglutination body of light 31 projects towards light direction, light-emitting surface 311 can be perpendicular to for light direction
The light direction of backlight module.It is easily understood that condensing body 31 is arranged between adjacent LED 2, that is to say, that condensing body 31
It is located at adjacent LED 2 between the orthographic projection on backboard 1 in the orthographic projection on backboard 1, as long as shown in Figure 1, condensing body 31 is perpendicular
Histogram is located at upwards between adjacent LED 2, is not intended to limit the relative altitude of condensing body 31 Yu LED2.
It is easily understood that large-sized display device is directed to, when using Mini LED backlight mould group, in order to obtain out light
Homogeneity needs to be covered with Mini LED on backlight module, thus, backlight module is needed using a large amount of Mini LED.
In the embodiment of the present invention, by the way that condensing body 31 is arranged between adjacent LED2, and condensing body 31 can make
The side of light (light that the LED2 adjacent with condensing body 31 is issued) autohemagglutination body of light 31 that the LED around condensing body 31 is issued
The light-emitting surface 311 of convergence and autohemagglutination body of light 31 projects after face is injected, and is equivalent to so i.e. adjacent in 31 position of condensing body
A point light source is provided between LED2, thus, it is no longer necessary to increase actual LED between adjacent LED2, can make
Under the premise of less LED number and cost, the emitting brightness in the region between adjacent LED is promoted, it is whole to promote backlight module
Go out light homogeneity, to improve the utilization rate of LED2.It is advantageously implemented in laptop and field of television using Mini
LED backlight mould group.
As shown in Figure 1, the backlight module of the embodiment of the present invention can also include diffusion layer 3, diffusion layer 3 is arranged in LED2's
Away from the side of backboard 1, condensing body 31 is between diffusion layer 3 and backboard 1.
It is easily understood that having certain distance between adjacent LED, the light emitting anger angle of usual LED encapsulation is about 120 °
(it is easily understood that the light combinations that LED is issued are tapered, the light emitting angle of LED is the angle of taper of taper), this just makes
Obtaining will appear light mixing area between two adjacent LEDs.In light mixing area, the more regional luminance of light coincidence is big, and light is overlapped few
Regional luminance is weak, is having light and dark lamp shadow (Hotspot) close to the side LED.The backlight module of the embodiment of the present invention,
Condensing body 31 is set between adjacent LED2, and diffusion layer 3 is set in the light emission side of condensing body 31 and LED2, can to gather
The upper surface for some light self-diffusion layer 3 after diffusion layer 3 that body of light 31 and LED2 are issued is projected, and diffusion layer 3 can be to penetrating
The light for entering diffusion layer 3 is diffused, thus, diffusion layer 3 can convert face for the point light source that LED2 and condensing body 31 form
Light source improves the light mixing area between adjacent LED, improves that Hotspot is bad, further increases the uniform of display device picture
Property.
In the present embodiment, it is propagated between condensing body 31 and diffusion layer 3 in order to facilitate light, in the present embodiment, such as
Shown in Fig. 1, condensing body 31 is that the lower surface of self-diffusion layer 3 is the protrusion protruded towards in the one side of LED2 towards 1 direction of backboard.
The side for at least partly light autohemagglutination body of light 31 that LED is issued is injected in condensing body 31, and successively passes through the condensing body and institute
It is projected after stating diffusion layer, another part light that LED is issued projects after the diffusion layer.
It sets condensing body 31 to the protrusion of the lower surface protrusion of self-diffusion layer 3, is conducive to light and is injected by condensing body 31
Diffusion layer 3 avoids interference of the other media to light between condensing body 31 and diffusion layer 3.
It is easily understood that in other embodiments, condensing body 31 or individual structure member, as long as can make
The light-emitting surface of convergence and self-diffusion layer, that is, upper surface is projected after the surface for the light autohemagglutination body of light that surrounding LED is issued is injected.
Fig. 2 is the light path schematic diagram of backlight module shown in Fig. 1.In the present embodiment, LED2 is Mini LED, the hair of LED2
Optic angle angle is β.As shown in Fig. 2, LED light-emitting surface is reduced to point light source.The optical path for the light being emitted out of β angular range can
To be divided into two parts, a part is injected in condensing body 31 from the side of condensing body 31 and is reflected in condensing body 31, reflects remittance
Projected after poly- from the first area 32 of 3 upper surface of diffusion layer, first area 31 be on the upper surface of diffusion layer 3 with 31 phase of condensing body
Corresponding region, region of the first area 31 also between adjacent LED are corresponding；A part by after diffusion layer 3 from diffusion layer 3
Upper surface on corresponding with LED region project.As shown in Fig. 2, the left and right side of condensing body 31 is respectively the first LED 21
With the 2nd LED 22.Light a part that first LED 21 is issued by after diffusion layer 3 from the upper surface of diffusion layer 3 with the
One LED 21 is projected in corresponding region, and a part of light is injected in condensing body 31 from the left side of condensing body 31；Similarly, second
Light a part that LED 22 is issued by after diffusion layer 3 from the region corresponding with the 2nd LED22 on the upper surface of diffusion layer 3
It projects, a part of light is injected in condensing body 31 from the right side of condensing body 31.First LED 21 and the 2nd LED 22 respectively from
The light that the side of condensing body 31 is injected in condensing body 31 converges in condensing body 31 and from the firstth area of the upper surface of diffusion layer 3
It projects in domain 32.
In order to enable light autohemagglutination body of light 31 side inject after converge, condensing body 31 can be reverse taper or inversed taper platform,
That is the cone angle of condensing body is towards backboard 1, as shown in Figure 1, to which the light that the side of autohemagglutination body of light 31 is injected can be in condensing body
Convergence in 31.As shown in Figure 1, one end towards backboard 1 of condensing body 31 is protruded into the space between adjacent LED2, i.e. optically focused
The bottom end of body 31 is lower than the top of LED2, it is thus possible to increase the light that LED2 is injected in condensing body 31, further promotes first
The emitting brightness in region 32.
In the present embodiment, condensing body 31 is inverted cone.The condensing body 31 of this structure, can make condensing body 31 weeks
Enclosing the light within the scope of 360 ° can inject in condensing body 31, further promote the emitting brightness of first area 32, i.e., into one
Step promotes the brightness in region between adjacent LED.In other embodiments, condensing body 31 can also be rounding frustum.
The light that LED2 is generated in order to prevent is projected or is consumed from backboard 1, in the present embodiment, as shown in Figure 1, backboard 1
It may include substrate 11 and reflecting layer 12, reflecting layer 12 is arranged in the one side towards diffusion layer 3 of substrate 11.To reflection
The light that layer 12 can be emitted onto thereon is reflected back diffusion layer 3 or condensing body 31, further increases light utilization.
In the long-time service of backlight module, in order to prevent dust pollution LED and influence the light-out effect of backlight module, such as
Shown in Fig. 1, backlight module can also include the protection glue-line 5 being covered on LED2 and backboard 1.Protection glue-line 5 on be provided with
The corresponding groove 51 of condensing body 31.Diffusion layer 3 is bonded with protection glue-line 5, and condensing body 31 is embedded in corresponding groove 51.
In the present embodiment, the material for protecting glue-line 5 may include Heat Conduction Material, such as heat conductive silica gel.Heat conductive silica gel tool
There are high thermal conductivity, splendid thermal conductivity, good electrical insulating property, wider use temperature and good stability, it can be at -60 DEG C
It is persistently used within the scope of~280 DEG C and property retention is good.Such protection glue-line 5 can not only prevent LED contaminated to protect
The light-out effect of backlight module is demonstrate,proved, and protects glue-line 5 that can conduct the heat of LED, radiates, avoids for backlight module
Backlight module temperature is excessively high.
In addition, LED is generally arranged on circuit control panel, therefore, backboard 1 can be circuit control panel.At this point, protective glue
When the material of layer 5 includes heat conductive silica gel, protection glue-line 5 has good electrical insulating property, to protect LED and circuit well
Control panel.
Fig. 3 is the overlooking structure diagram of backlight module shown in Fig. 1.As shown in figure 3, multiple LED2 array arrangements, adjacent
The LED of two rows or adjacent two column is staggered.In the present embodiment, the spacing of the adjacent LED in every a line is equal, on each column
Adjacent LED spacing it is equal.Such arrangement, so that condensing body 31 is located at the two adjacent LEDs on line direction simultaneously
Between and column direction on two adjacent LEDs between, then, around condensing body 31 include at least 4 LED.To condensing body
4 LED light injected can converge and project from first area 32 by 31, further promote going out for first area 31
Brightness.Moreover, such structure, can also reduce the quantity of condensing body 31.
In the present embodiment, the line space and column pitch of LED arrangement are equal.Orthographic projection side of the condensing body 31 on backboard 1
Orthographic projection side edge of the edge with the LED (LED adjacent with condensing body 31) of surrounding on backboard 1.To, as shown in figure 3, from
The overlook direction of backlight module is seen, is equivalent on backboard 1 and has been covered with LED2, to further improve backlight module light-emitting surface
Light homogeneity out.
Fig. 4 is the detailed light path schematic diagram of backlight module shown in Fig. 1.In the present embodiment, in order to guarantee light in optically focused
It is propagated between body and diffusion layer, condensing body 31 is identical with the material of diffusion layer 3.The refractive index of condensing body 31 and diffusion layer 3 is n2。
The refractive index for protecting glue-line 5 is n1.In the present embodiment, as shown in figure 4, the light 100 of the first LED21 sending is with incidence angle θ1
Enter in condensing body 31 from the left side of condensing body 31, (refraction angle θ after being reflected in condensing body 312) from diffusion layer 3
Upper surface project.Meet law of refraction n at this time1sinθ1=n2sinθ2.In order to guarantee that refracted light is penetrated from first area 32
Out, guarantee the light convergence effect of condensing body 31, in the present embodiment, n2>n1.I.e. protection glue-line 5 is optically thinner medium, condensing body
31 and diffusion layer 3 be optically denser medium, so, refraction angle θ2<θ1, thereby may be ensured that and condensing body is entered by 31 left side of condensing body
Light in 31 can project after reflecting in condensing body 31 from first area 32.
In the present embodiment, n2>n1, i.e. protection glue-line 5 is optically thinner medium, and condensing body 31 and diffusion layer 3 are optically denser medium.
As shown in figure 4, the light 101 that the first LED21 is issued becomes light vertically into rear in condensing body 31 from the left side of condensing body 31
Line 102, light 102 are irradiated on the right side of condensing body 31.The right side of condensing body 31 is condensing body 31 and protection glue-line 5
Critical surface, when light 102 is irradiated to the right side of condensing body 31, light 102 exists simultaneously instead on the right side of condensing body 31
It penetrates and reflects.The light that light 102 is reflected through 31 right side of condensing body can be projected from first area 31, and the light reflected can be into
Enter to protect in glue-line 5 and causes light losing.In order to avoid light is projected from condensing body 31, light 102 can be made in condensing body 31
Right side be totally reflected.Incidence angle of the light 102 in right side is α, according to optical principle, if light 102 is on right side
Full transmitting occurs for face, then:
As shown in figure 4, the angle of taper of condensing body 31 is Φ, Φ=α in Fig. 4.
It is easily understood that according to refraction of light path and principle of reflection, when the light emitting anger angle beta that light 101 is the first LED21
On light when, the light within the scope of the light emitting anger angle beta of the first LED21 enters in condensing body 31 and is refracted to condensing body
It can produce total reflection when on right side and projected from first area 32, and then guarantee the light convergence effect of condensing body 31.
In the present embodiment, the material of diffusion layer 3 and condensing body 31 is transparent polyethylene terephthalate
(PET), the refractive index n of diffusion layer 3 and condensing body 312About 1.655, the light penetration of diffusion layer 3 and condensing body 31 is about
90%.The material for protecting glue-line 5 is heat conductive silica gel, protects the refractive index n of glue-line 51About 1.496.
In conjunction with the refraction of the light emitting anger angle, the cone point of condensing body 31 to the factors such as the distance in reflecting layer 12 and light of LED2
And principle of reflection, the angle of taper of condensing body 31 can be obtained.
In the present embodiment, the angle of taper Φ of condensing body 31 is 60 °~90 °.
The light path schematic diagram that Fig. 5 is the angle of taper of condensing body when being 60 °.As shown in figure 5, at this point, the light emitting anger of LED2
Angle is 120 °, and the side edge length of condensing body 31 is 0.2mm, and the spacing between two neighboring condensing body 31 is 0.2mm, condensing body
31 cone point is about 0.11mm at a distance from reflecting layer, and LED2 and the lateral distance of the cone point of condensing body 31 are about 0.2mm, diffusion
Distance about 0.29mm between 3 lower surface of layer and reflecting layer.Light 103 enter in condensing body 31 from the left side of condensing body 31 and
It is projected after being reflected in condensing body 31 from first area 32.The incidence angle of light 103 is θ1, refraction angle θ2.When light 103
When entering in condensing body 31 from the upper extreme point of the left side of condensing body, available θ1maxAbout 22 °, θ2maxAbout 20 °.Light
104 be the light on 120 ° of light emitting anger angle of LED2, and light 104 is vertically injected in condensing body 31.By it was verified that when back
When optical mode group meets parameter shown in fig. 5, is entered in condensing body 31 by a side of condensing body 31 and be refracted to another side
Light 80% generate total reflection so that light mixing shadow area's luminous flux between two adjacent LEDs 2 increases, increase adjacent two
The brightness in region between a LED3 mitigates Hotspot.
The light path schematic diagram that Fig. 6 is the angle of taper of condensing body when being 90 °.As shown in fig. 6, at this point, the light emitting anger of LED2
Angle is 120 °, and the spacing between two neighboring condensing body 31 is 0.2mm, and the cone point of condensing body 31 is about at a distance from reflecting layer
The lateral distance of the cone point of 0.14mm, LED2 and condensing body 31 is about 0.24mm, distance between 3 lower surface of diffusion layer and reflecting layer
About 0.28mm.The incidence angle of light 103 is θ1, refraction angle θ2.When light 103 enters from the upper extreme point of the left side of condensing body
When in condensing body 31, available θ1maxAbout 25 °, θ2maxAbout 22.5 °.Light 104 is on 120 ° of light emitting anger angle of LED2
Light, light 104 is irradiated to the lower extreme point of 31 left side of condensing body.By it was verified that when backlight module meets shown in Fig. 5
Parameter when, entered in condensing body 31 by a side of condensing body 31 and be refracted to another side light about 80% generate it is complete
Reflection, so that light mixing shadow area's luminous flux between two adjacent LEDs 2 increases, increases region between two adjacent LEDs 3
Brightness mitigates Hotspot.
In the present embodiment, as shown in figure 4, the angle of taper Φ of condensing body 31 can ben2=1.655, n1
=1.496, then Φ=60 °.When LED2 light emitting anger angle beta be 120 °, condensing body 31 is entered by a side of condensing body 31
Light that is interior and being refracted to another side almost generates total reflection.
In embodiments of the present invention, the material of diffusion layer 3 and condensing body 31 is transparent polyethylene terephthalate
The material of ester (PET), protection glue-line 5 is heat conductive silica gel, and therefore, the manufacturing process of backlight module may include:
The LED is arranged on the backboard, specifically, using the brilliant technique of point by Mini LED wafer piece in backboard
On 1, as shown in fig. 7, Fig. 7 is to form the structural schematic diagram after LED in backlight module forming process.
Method on the backboard for being formed with the LED using coating forms protection glue-line, specifically, using line dispensing work
Skill uniform coated with thermally conductive silica gel on the backboard 1 for be formed with Mini LED, coating thickness about 0.3mm form protection glue-line 5.
The protection glue-line is handled, makes the protection glue-line semi-solid preparation, specifically, using ultraviolet light to protective glue
Layer is irradiated, and controls UV energy accounting and irradiation time, so that protection 5 semi-solid preparation of glue-line.
The groove between adjacent LED is formed on the upper surface of the protection glue-line, specifically, by presetting
Good imprint mold is formed in the upper surface of protection glue-line 5 using imprint process, is formed and be situated between on the upper surface of protection glue-line 5
Groove 51 between adjacent LED, as shown in figure 8, Fig. 8 is to form the structural representation after groove in backlight module forming process
Figure.
Coating forms condensing body and diffusion layer on the protection glue-line, and the condensing body is embedded in the groove, specifically
To coat PET above protection glue-line 5 using line gluing process, being integrally formed condensing body after protection glue-line 5 is fully cured
31 and diffusion layer 3, condensing body is embedded in groove 51, and the thickness of diffusion layer 3 is about 0.1mm, as shown in Figure 1.
Second embodiment:
Inventive concept based on previous embodiment, the embodiment of the invention also provides a kind of display device, the display devices
Including the backlight module using previous embodiment.Display device can be with are as follows: mobile phone, tablet computer, television set, display, notes
Any products or components having a display function such as this computer, Digital Frame, navigator.
In the description of the embodiment of the present invention, it is to be understood that term " middle part ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom", "inner", "outside" be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the description of the embodiment of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (12)
1. a kind of backlight module, which is characterized in that including backboard, spaced multiple LED and setting on the backboard
Condensing body between adjacent LED, at least partly light that the condensing body can be such that the LED being located at around the condensing body issues
Line is converged after injecting from the surface of the condensing body and is projected from the condensing body.
2. backlight module according to claim 1, which is characterized in that the backlight module further includes being arranged in the LED
The diffusion layer away from the backboard side, the condensing body is from direction in the one side towards the LED of the diffusion layer
The protrusion of the backboard direction protrusion, at least partly light that the LED is issued are injected described poly- from the side of the condensing body
It in body of light, and is successively projected after the condensing body and the diffusion layer, another part light that the LED is issued passes through institute
It is projected after stating diffusion layer.
3. backlight module according to claim 1, which is characterized in that the condensing body is in inverted cone or rounding frustum.
4. backlight module according to claim 3, which is characterized in that the angle of taper of the condensing body is 60 °~90 °.
5. backlight module according to claim 1, which is characterized in that multiple LED array arrangements, adjacent rows or phase
The LED of two column of neighbour is staggered.
6. backlight module according to claim 5, which is characterized in that the line space of adjacent rows LED and adjacent two column LED
Column pitch it is equal, the condensing body on the backboard orthographic projection edge and around positive throwing of the LED on the backboard
Shadow side edge.
7. backlight module described according to claim 1~any one of 4, which is characterized in that the backboard include substrate with
And be arranged in the substrate towards it is described diffusion it is laminated on reflecting layer.
8. backlight module described according to claim 1~any one of 4, which is characterized in that the backlight module further includes
The protection glue-line being covered on the LED is provided with groove corresponding with the condensing body, the expansion on the protection glue-line
It dissipates layer to be bonded with the protection glue-line, the condensing body is embedded in the corresponding groove.
9. backlight module according to claim 8, which is characterized in that the refractive index of the protection glue-line is less than the optically focused
The refractive index of body.
10. backlight module according to claim 1, which is characterized in that the light emitting anger angle of the LED is 120 °, described
The bottom end of condensing body is lower than the top of the LED.
11. a kind of preparation method of backlight module characterized by comprising
The LED is arranged on the backboard；
Method on the backboard for being formed with the LED using coating forms protection glue-line；
The protection glue-line is handled, the protection glue-line semi-solid preparation is made；
The groove between adjacent LED is formed on the upper surface of the protection glue-line；
Coating forms condensing body and diffusion layer on the protection glue-line, and the condensing body is embedded in the groove.
12. a kind of display device, which is characterized in that including backlight module described in any one of claim 1~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175979.9A CN109754711B (en) | 2019-03-08 | 2019-03-08 | Backlight module, preparation method thereof and display device |
Applications Claiming Priority (1)
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| CN115629496A (en) * | 2022-08-18 | 2023-01-20 | 京东方科技集团股份有限公司 | A kind of backlight module and its preparation method, display device |
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