CN106090730B - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN106090730B CN106090730B CN201610532178.XA CN201610532178A CN106090730B CN 106090730 B CN106090730 B CN 106090730B CN 201610532178 A CN201610532178 A CN 201610532178A CN 106090730 B CN106090730 B CN 106090730B
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- Prior art keywords
- light source
- light
- recessed portion
- backlight module
- angle
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/104—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using feather joints, e.g. tongues and grooves, with or without friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to field of display technology, a kind of backlight module and display device are disclosed.Backlight module includes: backboard, and multiple successively alternatively distributed recessed portions and lug boss are formed on the backboard；Multiple first light sources, each first light source correspondence is installed in a recessed portion, and the light direction of each first light source is towards the opening of corresponding recessed portion；Multiple second light sources, each second light source is corresponding to be installed on a lug boss and is located at the side that the lug boss deviates from recessed portion, and the light direction of each second light source is identical as the light direction of first light source；In the orientation of recessed portion and lug boss, each first light source is less than the light-emitting angle of first light source and the light-emitting angle of second light source by the angle for the light being emitted in corresponding recessed portion.The backlight light-emitting angle of the backlight module is adjustable, then using the adjustable of the display view angle of the display device of the backlight module, improves the applicability of display device and the usage experience of user.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of backlight module and display device.
Background technique
With the development of science and technology, computer and mobile terminal (such as mobile phone and tablet computer) have been widely used for handling official business and learn
Habit field.When user uses computer or mobile terminal in public, shown content may be by display device
People around user pries through, to make the risk of user's generation leakage of private information.
Method frequently with the light-emitting angle for the backlight for reducing backlight module to reduce the display view angle of display device at present,
So that the user that content shown by display device can only be in the backlight light-emitting angle location of backlight module sees,
To reduce the probability that display content is pried through by the people around user, to protect the privacy of user；But needing more people total
When with viewing display content, the relatively narrow display device of the display view angle is unfavorable for more people and watches together, to reduce display dress
The applicability set, and decline the usage experience of user.
Summary of the invention
The present invention provides a kind of backlight module and display devices, using the display view angle of the display device of the backlight module
It is adjustable, improve the applicability of display device, while improving the usage experience of user.
To achieve the above object, the present invention provides the following technical solution:
A kind of backlight module, comprising:
Backboard is formed with multiple successively alternatively distributed recessed portions and lug boss on the backboard；
Multiple first light sources, each first light source correspondence is installed in a recessed portion, and each first light source go out
Opening of the light direction towards corresponding recessed portion；
Multiple second light sources, each second light source is corresponding to be installed on a lug boss and deviates from positioned at the lug boss
The side of recessed portion, and the light direction of each second light source is identical as the light direction of first light source；
Along any recessed portion towards the direction of a lug boss adjacent thereto, each first light source is by corresponding recessed portion
The angle of the light of interior outgoing is less than the light-emitting angle of first light source and the light-emitting angle of second light source.
In backlight module provided by the invention, on backboard include multiple successively alternatively distributed recessed portions and lug boss, by
It is set in recessed portion in first light source, along any recessed portion towards the direction of a lug boss adjacent thereto, first light source
Emergent light blocked by recessed portion, angle is less than the light-emitting angle of first light source, and not due to the emergent light of second light source
It is blocked, first light source is less than the light-emitting angle of second light source by the angle for the light being emitted in recessed portion；In the backlight module
Use process in, when the backlight of conventional light-emitting angle need to be provided, control first light source close and open second light source, by
It is not blocked in the emergent light of second light source, backlight module can provide the backlight of conventional light-emitting angle at this time, to realize normal view
Angle is shown；When that need to provide the backlight of relatively narrow light-emitting angle, control first light source is opened and closes second light source, due to first
The emergent light of light source is blocked by recessed portion, and first light source is less than going out for second light source by the angle for the light being emitted in recessed portion
Angular, backlight module provides the lesser backlight of light-emitting angle at this time, to realize that narrow viewing angle is shown；
The backlight light-emitting angle of backlight module provided by the invention is adjustable, then using the aobvious of the display device of the backlight module
Show the adjustable of visual angle, therefore improve the applicability of display device, while improving the usage experience of user.
Preferably, each recessed portion be extending direction with along any recessed portion towards the side of a lug boss adjacent thereto
To vertical groove, and the groove is equally spaced along the direction of any recessed portion towards a lug boss adjacent thereto.
Further, each first light source and each second light source are LED light bar.
Preferably, each first light source is movably installed in a recessed portion by height adjustment mechanism, the height tune
Section mechanism is used to adjust along direction of the edge perpendicular to the backboard each first light source and corresponding with the first light source recessed
The distance between opening of concave portion.
Further, the height adjustment mechanism includes being set to away from the convex of the light direction side of each first light source
Wheel, and the driving mechanism for connect with the cam and being used to driving the cam to rotate, the cam surface of the cam with it is described
First light source offsets away from the side of its light direction.
Preferably, each first light source, and/or, the light-emitting angle of each second light source is 115 ° -120 °, each first
Light source is 50 ° -60 ° by the angle for the light being emitted in corresponding recessed portion.
Preferably, along any recessed portion towards the direction of a lug boss adjacent thereto, each first light source is in backlight
The width of irradiation area on the light-emitting surface of mould group is greater than or equal to adjacent the distance between two first light sources；
In the orientation along recessed portion and lug boss, irradiation of each second light source on the light-emitting surface of backlight module
The width in region is greater than or equal to the distance between two neighboring second light source.
Preferably, each first light source meets following public affairs by the size of the angle for the light being emitted in corresponding recessed portion
Formula:
Tan (θ/2)=L/2H；
Wherein, the θ is each first light source by the angle for the light being emitted in corresponding recessed portion；
The L is along any recessed portion towards the width of each recessed portion on the direction of a lug boss adjacent thereto；
The H is along the direction on edge perpendicular to the backboard, between the first light source and the opening of the recessed portion
Distance.
Preferably, further include be set on the backboard and be located at each recessed portion opening institute direction side, be used for
Support the support plate of optical film material.
Further, the support plate is prepared using polymethyl methacrylate or makrolon material.
It preferably, further include being set on the backboard for installing the reflection of the side of first light source and second light source
Piece.
The present invention also provides a kind of display devices, including backlight module as described above.
It include multiple successively alternatively distributed recessed portions on the backboard of backlight module in display device provided by the invention
And lug boss, since first light source is set in recessed portion, the emergent light of first light source is blocked by recessed portion, and angle is less than
The light-emitting angle of first light source, and since the emergent light of second light source is not blocked, first light source is by the light that is emitted in recessed portion
The angle of line is less than the light-emitting angle of second light source；In the use process of the display device, it need to realize that normal viewing angle is shown
When, control first light source closes and opens second light source, since the emergent light of second light source is not blocked, backlight module at this time
It can provide the backlight of conventional light-emitting angle, to realize that normal viewing angle is shown；When that need to realize narrow viewing angle display, first light source is controlled
It opens and closes second light source, since the emergent light of first light source is blocked by recessed portion, first light source in recessed portion by going out
The angle for the light penetrated is less than the light-emitting angle of second light source, and backlight module provides the lesser backlight of light-emitting angle at this time, with reality
Existing narrow viewing angle is shown；
The display view angle of display device provided by the invention it is adjustable, therefore improve the applicability of display device,
The usage experience of user is improved simultaneously.
Detailed description of the invention
Fig. 1 be the backlight module that provides of the embodiment of the present invention one along any recessed portion towards a protrusion adjacent thereto
Structural schematic diagram on the direction in portion；
Fig. 2 a is working principle diagram of the backlight module of Fig. 1 offer when realizing that conventional visual angle is shown；
Fig. 2 b is working principle diagram of the backlight module of Fig. 1 offer when realizing narrow viewing angle display；
Fig. 3 a is the structural schematic diagram for the height adjustment mechanism that the embodiment of the present invention one provides；
Fig. 3 b be the height adjustment mechanism that provides of the embodiment of the present invention one along any recessed portion towards adjacent thereto one
Structural schematic diagram on the direction of a lug boss；
Fig. 4 is the dimensional structure schematic diagram for the backlight module that the embodiment of the present invention one provides.
Appended drawing reference:
10, backboard；11, recessed portion；12, lug boss；21, first light source；
211, LED light；212, substrate；30, height adjustment mechanism；31, cam；
32, transmission shaft；33, driving mechanism；40, support plate.
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 the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of backlight module is present embodiments provided, shown in Figure 1, Fig. 1 is backlight module along any recessed portion court
Sectional view on the direction of a lug boss adjacent thereto, the backlight module include:
Backboard 10 is formed with multiple successively alternatively distributed recessed portions 11 and lug boss 12 on backboard 10；In specific implementation,
Sheet metal component can be used in backboard 10, then process for stamping preparation can be used in recessed portion 11 and lug boss 12；
Multiple first light sources 21, each first light source 21 correspondence is installed in a recessed portion 11, and each first light
Opening of the light direction in source 21 towards corresponding recessed portion 11；
Multiple second light sources 22, each second light source 22 is corresponding to be installed on a lug boss 12 and is located at lug boss 12
Away from the side of recessed portion 11, and the light direction of each second light source 22 is identical as the light direction of first light source 21；
Shown in Figure 1, direction Y shown in Fig. 1 is along any one recessed portion 11 towards a protrusion adjacent thereto
The direction in portion 12, and direction Y is parallel with backboard, each first light source 21 is by the angle for the light being emitted in corresponding recessed portion 11
A is less than the light-emitting angle (not shown) of first light source 21 and the light-emitting angle B of second light source 22, and light-emitting angle is light source
Light scattering angle, the present embodiment provides in the backlight module, convex towards adjacent thereto one along any one recessed portion 11
On the direction Y for playing portion 12, the included angle A between the line of the opening of each first light source 21 and the recessed portion 11 corresponding to it is less than
The light-emitting angle of first light source 21, that is, first light source 21 emit light some blocked by recessed portion 11 and cannot be by recessed
It is projected in concave portion 11, then first light source 21 is made to be less than its light-emitting angle by the included angle A for the light being emitted in corresponding recessed portion 11；
In the present embodiment, the light-emitting angle of first light source 21 and second light source 22 be may be the same or different, it is preferable that for convenient for light source original part
Selection and improve efficiency when first light source 21 and second light source 22 are installed, the beam angle of first light source 21 and second light source 22
It spends identical.
It include multiple successively alternatively distributed recessed portions 11 and lug boss on backboard 10 in backlight module provided by the invention
12, since first light source 21 is set in recessed portion 11, on the longitudinal direction Y along backboard 10, the emergent light of first light source 21
It is blocked by recessed portion 11, the light-emitting angle of first light source 21 is less than by the emergent light included angle A in recessed portion 11, and due to the
The emergent light of two light sources 22 is not blocked, and first light source 21 is less than second light source by the included angle A for the light being emitted in recessed portion 11
22 light-emitting angle B；
Referring to fig. 2 shown in a, in the use process of the backlight module, when the backlight of conventional light-emitting angle need to be provided, control
First light source 21 processed closes and opens second light source 22, since the emergent light of second light source 22 is not blocked, backlight mould at this time
Group can provide the backlight of conventional light-emitting angle (generally 110 °~120 °), and light-emitting angle B can realize that normal viewing angle is shown；
Referring to fig. 2 shown in b, when that need to provide the backlight of relatively narrow light-emitting angle, control first light source 21 is opened and makes second
Light source 22 is closed, and since the emergent light of first light source 21 is blocked by recessed portion 11, first light source 21 in recessed portion 11 by being emitted
The included angle A of light be less than the light-emitting angle B of second light source 22, backlight module provides light-emitting angle and is less than conventional beam angle at this time
The backlight of degree, to realize that narrow viewing angle is shown；
In specific implementation, in use because of the display device using above-mentioned backlight module, viewer need to generally prevent
People of the stop bit at left and right sides of viewer pries through display content or need to share display screen with the people being located at left and right sides of viewer
Curtain, therefore, it is shown in FIG. 1 along any one recessed portion 11 towards a lug boss 12 adjacent thereto direction Y preferably with viewing
The sight width direction of person is parallel, to adjust visual angle of the display device in the sight width direction of viewer；
In addition, the direction Y shown in FIG. 1 along any one recessed portion 11 towards a lug boss 12 adjacent thereto can also edge
The height of sighting line direction of viewer, to adjust visual angle of the display device on the height of sighting line direction of viewer.
Because the backlight light-emitting angle of backlight module provided by the invention is adjustable, then using the display device of the backlight module
Display view angle it is adjustable, therefore improve the applicability of display device, while improving the usage experience of user.
In a kind of preferred embodiment, for the processing for being convenient for recessed portion 11, each recessed portion 11 is extending direction and along appointing
The direction Y of one recessed portion 11 towards a lug boss 12 adjacent thereto vertical groove, and groove is along any one recess
The direction Y of portion 11 towards a lug boss 12 adjacent thereto is equally spaced；Correspondingly, each lug boss 12 is and recessed portion
11 successively adjacent bar shaped boss, and the extending direction of each bar shaped boss with along any one recessed portion 11 towards adjacent thereto
A lug boss 12 direction Y it is vertical, and boss along any one recessed portion 11 towards a lug boss 12 adjacent thereto
Direction Y is equally spaced；In specific implementation, when backboard 10 is using sheet metal component, groove and boss equally can be used process for stamping and add
Work is formed.
Further, when recessed portion 11 is above-mentioned groove and lug boss 12 is above-mentioned boss, each 21 He of first light source
Each second light source 22 is LED light bar, and LED light bar is installed along the extending direction of groove and boss.It is shown in Figure 4, each
LED light bar includes substrate 212 and multiple LED light 211 for being mounted on substrate 212.
In a kind of preferred embodiment, further to adjust first light source 21 by the folder for the light being emitted in corresponding recessed portion 11
Angle A, to carry out both view angle adjustment when narrow viewing angle display, each first light source 21 is movably installed in one by height adjustment mechanism
In recessed portion 11, height adjustment mechanism is used to adjust along direction of the edge perpendicular to backboard 10 each first light source 21 and right with it
The distance between the opening for the recessed portion 11 answered；First light source 21 and corresponding recessed portion 11 is adjusted in height adjustment mechanism
The distance between opening, then between the line that can correspond to the opening for adjusting first light source 21 and the recessed portion 11 corresponding to it
The size of included angle A, and then adjust the size of part that the light that first light source 21 emits is blocked by recessed portion 11, to realize the
One light source 21 by the light being emitted in corresponding recessed portion 11 included angle A size, specifically, first light source 21 and with
When the distance between opening of its corresponding recessed portion 11 increases, first light source 21 is by being emitted in corresponding recessed portion 11
The included angle A of light reduces, when the distance between first light source 21 and the opening of corresponding recessed portion 11 reduces, the first light
Source 21 is increased by the included angle A for the light being emitted in corresponding recessed portion 11.
Above-mentioned height adjustment mechanism can be used mode as illustrated in figures 3 a and 3b and realize, referring to shown in Fig. 3 a, height
Regulating mechanism 30 includes being set to the cam 31 away from the light direction side of each first light source 21,31 face of cam of cam 31
It offsets with first light source 21 away from the side of its light direction, and the drive for being connect with cam 31 and being used to that cam 31 to be driven to rotate
Motivation structure 33, driving mechanism 33 can be motor, and driving mechanism 33 is connect by transmission shaft 32 with cam 31；
First light source 21 is slidably mounted in recessed portion 11, and can be transported along the direction perpendicular to backboard 10 relative to backboard 10
It is dynamic, it is preferable that first light source 21 uses above-mentioned LED light bar, and settable through-hole or fluting on the substrate 212 of lamp bar are being recessed
Be arranged inside portion 11 with through-hole or the guide post that is slidably matched of fluting, being slidably matched for LED light bar and recessed portion 11 can be realized；When
So, the method for being slidably connected between first light source 21 and recessed portion 11 is not limited to aforesaid way, as long as being able to achieve first light source 21
It can be slided in recessed portion 11 along the direction perpendicular to backboard 10；
Referring to shown in Fig. 3 b, when driving mechanism 33 is rotated by transmission shaft 32 with moving cam 31, the cam surface of cam 31
The Slideslip for deviating from its light emission side relative to first light source 21, to make between first light source 21 and the rotation center of cam 31
Distance change with the contact position of 31 face of cam and first light source 21, and then make first light source 21 can be shown in Fig. 3 b
Perpendicular to the direction sliding of backboard 10, the tune of the distance between first light source 21 and corresponding opening of recessed portion 11 is realized
Section.
In addition to realizing using 31 mechanism of cam other modes realization also can be used, such as the in above-mentioned height adjustment mechanism
Stepper motor, lead screw isoline transmission parts is arranged away from the side of its light emission side in one light source 21, or deviates from first light source 21
Two voussoirs that inclined-plane offsets are arranged to carry out the driving of first light source 21 in the side of its light emission side.
In a kind of preferred embodiment, each first light source 21, and/or, the light-emitting angle of each second light source 22 is 115 °-
120 °, each first light source 21 is 50 ° -60 ° by the included angle A for the light being emitted in corresponding recessed portion 11；Second light source
22 provide conventional viewing angle to adapt to more people's viewings when using 115 ° -120 ° of light-emitting angle that conventional visual angle can be made to show, and
Each first light source 21, which is 50 ° -60 ° by the included angle A for the light being emitted in corresponding recessed portion 11, so that narrow viewing angle is shown
Lesser viewing angle for the more conventional viewing angle of offer when mode.
In a kind of preferred embodiment, for improve first light source 21 and second light source 22 the backlight provided uniformity, reduce
There is the dark space being spaced apart in the screen using the display device of the backlight module, it is shown in Figure 4, recessed along any one
Concave portion 11 is towards on the direction Y of a lug boss 12 adjacent thereto, and each first light source 21 is on the light-emitting surface of backlight module
The width F of irradiation area be greater than or equal to the distance between two adjacent first light sources 21 K；
Along direction Y of any one recessed portion 11 towards a lug boss 12 adjacent thereto, each second light source 22
It is greater than or equal to the distance between two neighboring second light source 22 in the width of the irradiation area on the light-emitting surface of backlight module, because
Second light source 22 and first light source 21 similarly, are not shown in Fig. 4；
Because irradiation area of whole first light sources 21 on the light-emitting surface of backlight module connects or overlaps, make to carry on the back
The light-emitting surface of optical mode group is all covered by the irradiation area of first light source 21, and the uniform of the backlight of the offer of first light source 21 can be improved
Degree；Similarly, irradiation area of all second light sources 22 on the light-emitting surface of backlight module connects or overlaps, and makes backlight
The light-emitting surface of mould group is all covered by the irradiation area of second light source 22, and the uniform of the backlight of the offer of second light source 22 can be improved
Degree.
In a kind of preferred embodiment, in the dimensional structure design for carrying out recessed portion 11, in first light source 21 by corresponding recessed
When the included angle A for the light being emitted in concave portion 11 has determined that, shown in Figure 4, each first light source 21 is by corresponding recessed portion 11
The size of the included angle A of the light of interior outgoing meets following equation:
Tan (θ/2)=L/2H；
Wherein, the θ is each first light source 21 by the included angle A for the light being emitted in corresponding recessed portion 11；
L is in each recessed portion 11 along direction Y of any one recessed portion 11 towards a lug boss 12 adjacent thereto
Width；
H is the distance between the opening of first light source 21 and recessed portion 11 along the direction on edge perpendicular to backboard 10.
According to above-mentioned formula, in required first light source 21 by the included angle A for the light being emitted in corresponding recessed portion 11
When size has determined that, it can calculate in the direction Y fovea superior along any one recessed portion 11 towards a lug boss 12 adjacent thereto
The width L of concave portion 11 and at a distance from first light source 21 along direction perpendicular to backboard 10 is between the opening of recessed portion 11
H, in order to carry out the dimensional structure design of recessed portion 11.
In a kind of preferred embodiment, shown in Figure 1, backlight module provided in this embodiment further includes being set on backboard 10
And it is located at the side of the opening institute direction of each recessed portion 11, is used to support the support plate 40 of optical film material.
Further, support plate 40 is high using polymethyl methacrylate (PMMA) or polycarbonate (PC) lamp translucency
Transparent material preparation.
It is to improve backlight module to the utilization rate of light source, backlight module provided in this embodiment is also in a kind of preferred embodiment
Including being set on backboard 10 for installing the reflector plate of the side of first light source 21 and second light source 22；Reflector plate should be set to
Each recessed portion 11 and each lug boss 12 are towards the side of first light source 21 and the light emission side of second light source 22, by the first light
The light towards backboard 10 that source 21 and second light source 22 generate reflexes to the side away from backboard 10, to improve the utilization of light source
Rate.
Embodiment two:
Present embodiments provide a kind of display device, including backlight module as described above.
It include multiple successively alternatively distributed recessed portions 11 and protrusion on the backboard 10 of backlight module in the display device
Portion 12, since first light source 21 is set in recessed portion 11, the emergent light of first light source 21 is blocked by recessed portion 11, angle
A is less than the light-emitting angle of first light source 21, and since the emergent light of second light source 22 is not blocked, first light source 21 is by recessed portion
The included angle A for the light being emitted in 11 is less than the light-emitting angle of second light source 22；In the use process of the display device, reality is being needed
When existing normal viewing angle display, control first light source 21 closes and opens second light source 22, due to the emergent light of second light source 22
It is not blocked, backlight module can provide the backlight of conventional light-emitting angle at this time, to realize that normal viewing angle is shown；It need to realize narrow view
When angle is shown, control first light source 21 is opened and closes second light source 22, since the emergent light of first light source 21 is by recessed portion
11 block, and first light source 21 is less than the light-emitting angle of second light source 22 by the included angle A of the light that is emitted in recessed portion 11, at this time
Backlight module provides the lesser backlight of light-emitting angle, to realize that narrow viewing angle is shown；
The display view angle of display device provided by the invention it is adjustable, therefore improve the applicability of display device,
The usage experience of user is improved simultaneously.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies
Within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (11)
1. a kind of backlight module characterized by comprising
Backboard is formed with multiple successively alternatively distributed recessed portions and lug boss on the backboard；
Multiple first light sources, each first light source correspondence are installed in a recessed portion, and the light side out of each first light source
To the opening towards corresponding recessed portion；
Multiple second light sources, each second light source is corresponding to be installed on a lug boss and is located at the lug boss away from recess
The side in portion, and the light direction of each second light source is identical as the light direction of first light source；
Along any recessed portion towards the direction of a lug boss adjacent thereto, each first light source in corresponding recessed portion by going out
The angle for the light penetrated is less than the light-emitting angle of first light source and the light-emitting angle of second light source；
Each first light source is movably installed in a recessed portion by height adjustment mechanism, and the height adjustment mechanism is for adjusting
Save along each first light source along direction perpendicular to the backboard and the opening of recessed portion corresponding with the first light source it
Between distance.
2. backlight module according to claim 1, which is characterized in that each recessed portion is for extending direction and along any recess
The vertical groove in the direction of portion towards a lug boss adjacent thereto, and the groove along any recessed portion towards adjacent thereto
The direction of a lug boss be equally spaced.
3. backlight module according to claim 2, which is characterized in that each first light source and each second light source are
LED light bar.
4. backlight module according to claim 1, which is characterized in that the height adjustment mechanism includes being set to away from every
The cam of the light direction side of a first light source, and the driving of the cam rotation is connect and is used to drive with the cam
Mechanism, the cam surface of the cam offset with the first light source away from the side of its light direction.
5. backlight module according to claim 1, which is characterized in that the light-emitting angle of each first light source be 115 °-
120 °, and/or, the light-emitting angle of each second light source is 115 ° -120 °；
Each first light source is 50 ° -60 ° by the light-emitting angle for the light being emitted in corresponding recessed portion.
6. backlight module according to claim 1, which is characterized in that convex towards adjacent thereto one along any recessed portion
The width in the direction in the portion of rising, irradiation area of each first light source on the light-emitting surface of backlight module is greater than or equal to adjacent two
The distance between a first light source；
Along any recessed portion towards the direction of a lug boss adjacent thereto, light-emitting surface of each second light source in backlight module
On the width of irradiation area be greater than or equal to the distance between two neighboring second light source.
7. backlight module according to claim 1, which is characterized in that each first light source in corresponding recessed portion by being emitted
The size of angle of light meet following equation:
Tan (θ/2)=L/2H；
Wherein, the θ is each first light source by the angle for the light being emitted in corresponding recessed portion；
The L is along any recessed portion towards the width of each recessed portion on the direction of a lug boss adjacent thereto；
The H be along direction perpendicular to the backboard, the opening of each first light source and corresponding recessed portion it
Between distance.
8. backlight module according to claim 1-7, which is characterized in that further include being set on the backboard simultaneously
Positioned at the opening institute direction of each recessed portion side, be used to support the support plate of optical film material.
9. backlight module according to claim 8, which is characterized in that the support plate using polymethyl methacrylate or
Makrolon material preparation.
10. backlight module according to claim 1-7, which is characterized in that further include being set on the backboard
For installing the reflector plate of the side of first light source and second light source.
11. a kind of display device, which is characterized in that including such as described in any item backlight modules of claim 1-10.
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| CN201610532178.XA CN106090730B (en) | 2016-07-04 | 2016-07-04 | A kind of backlight module and display device |
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| CN108897169B (en) * | 2018-07-25 | 2021-10-12 | 京东方科技集团股份有限公司 | Light-emitting module, control method thereof and display device |
| CN109188769B (en) * | 2018-09-30 | 2021-08-17 | 合肥京东方显示光源有限公司 | Backlight source, display panel and display device |
| CN110068946B (en) | 2019-05-17 | 2021-12-03 | 京东方科技集团股份有限公司 | Display module, display device and visual angle control method |
| CN110189628B (en) * | 2019-06-28 | 2023-01-10 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN111474747A (en) * | 2020-04-20 | 2020-07-31 | 京东方科技集团股份有限公司 | Backlight module, driving method thereof and display device |
| CN112967617A (en) * | 2021-02-09 | 2021-06-15 | 维沃移动通信有限公司 | Display module and electronic device |
| CN114613284B (en) * | 2022-03-01 | 2023-11-21 | 厦门天马微电子有限公司 | Display panel and display device |
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| JP4014026B2 (en) * | 2001-10-16 | 2007-11-28 | 株式会社エンプラス | Surface light source device, image display device, and light guide plate |
| JP4626645B2 (en) * | 2007-11-27 | 2011-02-09 | ソニー株式会社 | Display device and optical device |
| CN201795430U (en) * | 2009-12-27 | 2011-04-13 | 金芃 | Bottom lighting light guide plate of LED backlight module |
| CN203615136U (en) * | 2013-11-28 | 2014-05-28 | 合肥京东方光电科技有限公司 | Backlight module and liquid crystal display device |
| CN103672537B (en) * | 2013-12-17 | 2016-05-25 | 合肥京东方光电科技有限公司 | A kind of LED lamp bar, backlight source module and display unit |
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