CN207408713U - Has the backlight module of local dimming effect - Google Patents
Has the backlight module of local dimming effect Download PDFInfo
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- CN207408713U CN207408713U CN201720683716.5U CN201720683716U CN207408713U CN 207408713 U CN207408713 U CN 207408713U CN 201720683716 U CN201720683716 U CN 201720683716U CN 207408713 U CN207408713 U CN 207408713U
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Abstract
The utility model provides a kind of backlight module for having local dimming effect, and backlight module includes a substrate and an at least lamp bar.Substrate has several echo areas being disposed adjacent, and each echo area has a concave surface, each concave surface and the setting that connects.Lamp bar has several point light sources and counterpart substrate at least one side is set, for throw light to substrate, to form light extraction via each concave reflection, wherein through the driver' s timing for controlling each point light source, to adjust the amount of light of each echo area, and then the effect of local dimming, display panel that thus can be in compliant display is in the amount of light needed for each region, corresponding adjustment is done using the driver' s timing of point light source in substrate, reaches the effect of promoting display picture contrast.
Description
Technical field
The utility model it is related to backlight module more particularly to it is a kind of have local dimming effect backlight module.
Background technology
In field of display, since display panel does not have luminous efficacy in itself, it is therefore necessary to which carrying can provide light
Backlight module, to achieve the purpose that show image.Known backlight module includes at least light guide plate and light source, and the light of light source enters
After light guide plate, influenced by its guiding property and form the area source for being uniformly projected to display panel.And in backlight module often
Numerous optical elements of in addition arranging in pairs or groups are still needed to, to promote the light emitting efficiency of backlight module, such as the uniformity or brightness etc..
With the variation and progress of demand, display is increasingly towards lightening development in recent years, relatively, arranges in pairs or groups what is used
The decrement whole height that backlight module must also try one's best, excessive thickness and weight will not be increased after display is assembled to.Right base
In the requirement, relevant manufactures are all directed to developing and designing counter structure, but opposite meet with is hindered in technology and cost, can not
In the case where meeting light extraction demand, backlight module integral thickness and weight are effectively reduced.
On the other hand, except the weight and thickness of display, display quality also considers for important design.For picture can be promoted
Face contrast, backlight module is it is still necessary to possess the function of being controlled each region amount of light, and most use of manufacturer will be multiple at present
Light guide plate is mutually assembled with connecting method, then sets light source respectively at light guide plate come the effect of reaching region light extraction, however this kind
Design is but added significantly to manufacture cost, weight and thickness, runs in the opposite direction instead with current display demand.
Effectively to solve the missing of current backlight module, a kind of backlight mould for having local dimming effect of the present inventor's design
Group, to provide the optical articles for more meeting market today demand.
Utility model content
The technical problems to be solved in the utility model is that can not have in the prior art in the case where meeting light extraction demand to overcome
The defects of effect ground reduces backlight module integral thickness and weight provides a kind of backlight module of tool local dimming effect, can be according to
According to the amount of light demand in each region of display picture, the light state that supplies in each region is dynamically adjusted, and in addition guide-lighting member need not be set
Part reaches the effect of reducing integral thickness and weight, and then reduces holistic cost.
The utility model is to solve above-mentioned technical problem by following technical proposals：
A kind of backlight module for having local dimming effect, for being applied to a display, feature is, the tool region tune
The backlight module of light effect includes：
One substrate has several echo areas being disposed adjacent, and respectively the echo area has a concave surface, and respectively the concave surface connects
It puts；And
An at least lamp bar, has several point light sources and the corresponding substrate at least one side is set, for throw light to the base
Plate, to form light extraction via the respectively concave reflection, wherein, through the driver' s timing of each point light source of control, to adjust, respectively this is anti-
The amount of light in area is penetrated, and then the effect of local dimming.
Light is reflected to form light extraction by backlight module through substrate as a result, without in addition setting light-guide device, effectively
Reduce integral thickness and weight, manufacture cost also relative reduction, and penetrate dynamic control point light source driver' s timing makes substrate can be according to
It is presented according to display demand in the light extraction that different zones have different amount of light.
Formed it is preferred that any concave surface is at least connected by a first surface and one second curved surface, and the first surface with
Second curved surface has different radius of curvature, goes out light state be more conducive to adjust each echo area.
Formed it is preferred that any concave surface is at least connected by a first surface and one second curved surface, and the first surface with
Second curved surface has different radian, also can reach the purpose for promoting each echo area light modulation efficiency.
Formed it is preferred that any concave surface is at least connected by one first inclined-plane and one second inclined-plane, and first inclined-plane with
Second inclined-plane has different angle with horizontal plane respectively, with according to demand and the light extraction shape of environmental condition control echo area
State.
It is preferred that two adjacent concave surface intersections is appointed to form a cambered surface, to eliminate hot spot phenomenon.
And the reflection performance to promote substrate, propose to make at least one concave surface in another embodiment as class minute surface
Structural form.
It is preferred that the backlight module of the tool local dimming effect also has an optical diaphragm, arranged on the light emission side of the substrate,
I.e. between display panel and substrate.It is possible thereby to adjust some light and the light guide of substrate reflection that lamp bar is sent.
It is preferred that the backlight module of the tool local dimming effect also has at least one first reflecting element, first reflecting element
The one side of the substrate is correspondingly arranged at, for reflecting light back into the substrate.It is possible thereby to make backlight module that there is more preferably light
Utilization rate.
It is preferred that the thickness of the substrate is cumulative towards opposite side by the one side for being correspondingly arranged the lamp bar, so that light modulation efficiency carries
It rises.
Or in another embodiment, the lamp bar is made to be connected setting with first reflecting element, thus to eliminate hot spot phenomenon
And reduce fiber-loss.
Wherein, in an embodiment, which sets the region of the lamp bar to have an inclined surface, with saturating
It crosses inclined surface and some light is reflected back substrate.
Or as described in another embodiment, it is micro- which sets the region of the lamp bar to be laid with a reflection
Structure also can effectively reflect light back into substrate.
Similarly, it is some light that adjustment lamp bar is sent and the light guide of substrate reflection, in one embodiment, takes off
An optical diaphragm is shown with, arranged on the light emission side of the substrate, and is stacked on above first reflecting element namely positioned at the display panel
Between first reflecting element.
It is preferred that the backlight module of the tool local dimming effect also has one first reflecting element and one second reflecting element, point
It is set respectively arranged on the opposite sides of the substrate, and between the substrate and first reflecting element and the substrate and second reflecting element
There is the lamp bar, the light ray parallel of those lamp bars substrate incident forms side and enters light, thus goes out to enhance the entirety of backlight module
Luminous intensity can more maintain required brightness when applied to large-sized monitor especially.
Efficiency is adjusted to promote the amount of light in each region, discloses the thickness of the substrate in one embodiment by setting the lamp
The both sides of item are cumulative towards center respectively.
Or in another embodiment, which is connected setting with first reflecting element, and hot spot phenomenon is eliminated to reach
Effect simultaneously slows down light consume.
In addition, being disclosed in an embodiment has an optical diaphragm, arranged on the substrate light emission side and to stack on this first anti-
It penetrates above part and second reflecting element namely between the display panel and first reflecting element and second reflecting element, with
Adjust the lamp bar and the part light guide form of substrate reflection.
It is preferred that the backlight module of the tool local dimming effect also has one first reflecting element and one second reflecting element, point
This is respectively equipped with arranged on the both sides of the substrate, and between the substrate and first reflecting element and the substrate and second reflecting element
Lamp bar corresponds to vertical substrate incident of the lamp bar light that first reflecting element is set, and what corresponding second reflecting element was set is somebody's turn to do
The lamp bar light ray parallel substrate incident, transmitted light are the lamp bar of vertical substrate incidence, can effectively reduce corresponding first reflection
Part length, and then reduce the border width of display.
Efficiency is adjusted to promote the amount of light in each region, discloses the thickness of the substrate in one embodiment by setting the lamp
The both sides of item are cumulative towards center respectively.
Wherein, in an embodiment, the length of first reflecting element is made to be less than second reflecting element, to avoid the second reflection
Part is too short to cause hot spot phenomenon.
Described in another embodiment, which is connected setting with second reflecting element, and hot spot phenomenon is eliminated to reach
Effect simultaneously slows down light consume.
In addition, in one embodiment, announcement has an optical diaphragm, arranged on the substrate light emission side and stack on this first
Above reflecting element and second reflecting element so that the optical diaphragm be located at the display panel and first reflecting element and this second instead
It penetrates between part, for adjusting some light and the light guide of substrate reflection that lamp bar is sent.
The positive effect of the utility model is：
The backlight module of tool local dimming effect that the utility model discloses, utilizes dynamic control point light source light-emitting sequential
Mode, the concave surface set using substrate are made light reflect to form light extraction, thus can comply with display demand in real time, have each region
Different goes out luminous intensity, promotes the picture contrast of the display of application.And it can be omitted as light transmitting medium through air
Light-guide device is set, and then reduces integral thickness and weight, and reduces development cost, to meet the market demand of display.
Description of the drawings
Figure 1A is the backlight module stereoscopic schematic diagram of one preferred embodiment of the utility model.
Figure 1B is the backlight module application top view of one preferred embodiment of the utility model.
Fig. 2A is the backlight module front view of one preferred embodiment of the utility model.
Fig. 2 B are the backlight module front view of another embodiment of one preferred embodiment of the utility model.
Fig. 2 C are the backlight module front view of the another embodiment of one preferred embodiment of the utility model.
Fig. 3 is the backlight module front view of one preferred embodiment of the utility model.
Fig. 4 is the backlight module front view of one preferred embodiment of the utility model.
Fig. 5 A are the backlight module stereoscopic schematic diagram of one preferred embodiment of the utility model.
Fig. 5 B are the backlight module application top view of one preferred embodiment of the utility model.
Fig. 6 is the backlight module front view of one preferred embodiment of the utility model.
Fig. 7 is the backlight module front view of one preferred embodiment of the utility model.
Fig. 8 is the backlight module front view of one preferred embodiment of the utility model.
Fig. 9 is the backlight module front view of one preferred embodiment of the utility model.
Figure 10 is the display stereoscopic schematic diagram of one preferred embodiment of the utility model.
Figure 11 is the display front view of one preferred embodiment of the utility model.
Figure 12 is the display front view of another embodiment of one preferred embodiment of the utility model.
Reference sign
1：Backlight module
10：Substrate
101：Echo area
1011：Concave surface
1012：First surface
1013：Second curved surface
103：Cambered surface
1015：First inclined-plane
1016：Second inclined-plane
11：Lamp bar
111：Point light source
12：First reflecting element
121：Inclined surface
122：Reflection micro-structure
123：First end
124：Second end
13：Second reflecting element
14：Optical diaphragm
2：Display
20：Display panel
θ1：First inclined-plane angle with horizontal plane
θ2：Second inclined-plane angle with horizontal plane
Specific embodiment
It names preferred embodiment, and becomes apparent from intactly illustrating the utility model with reference to attached drawing.
The advantages that make display that can have both low cost, low thickness, low weight and dynamic light adjustment effect simultaneously, the present inventor
Possess splendid control light transmittance efficiency in this proposition, and have the backlight module of low manufacture cost and thickness.Please refer to Fig.1 A, Figure 1B, Fig. 2A,
Fig. 2 B and Fig. 2 C, be the backlight module stereoscopic schematic diagram of one preferred embodiment of the utility model, backlight module application top view,
The backlight module front view of backlight module front view, the backlight module front view of another embodiment and another embodiment.Tool
The backlight module 1 of local dimming effect is for being applied in a display, including a substrate 10 and an at least lamp bar 11.Aforesaid base plate
10 have several echo areas 101 being disposed adjacent, and each echo area 101 has a concave surface 1011, and each concave surface 1011 simultaneously connects
It puts.Lamp bar 11 has several point light sources 111 and at least one side of counterpart substrate 10 is set, for throw light to substrate 10, with shape
Into light is laterally entered, light is projected to after substrate 10 through reflecting to form light extraction by each concave surface 1011.Wherein, through each point light source of control
111 driver' s timing, you can the amount of light of each echo area 101 is adjusted, and then the effect of local dimming.That is, according to aobvious
Show the brightness needed for each region of picture, control the driving condition of point light source, you can corresponding echo area 101 is made to propose light reflection
For required amount of light.Backlight module 1 uses substrate 10 directly as optical element as a result, without separately by other
The ray guidance of point light source 111 is formed area source by light-guide device, is effectively reduced the production cost and thickness of backlight module 1.
Simultaneously can be according to display in the luminous intensity that goes out needed for each time point and region, progress dynamic control shows picture to be promoted
Contrast.Through 1 structure of backlight module described in the present embodiment, concept is guided through air, using air as light-conductive media
Without setting light guide plate, but uniform area source is stilld provide, and then reduce product cost and weight.And utilize lamp bar
The drive control of 11 point light sources 111, you can the reflection light quantity of each echo area 101 is dynamically adjusted, to meet display in picture
Instantly, the brightness that each region needs as shown in Figure 1B, represents different amount of lights, still in figure with different filling patterns for display
The form is merely to illustrate, and not represents actual light extraction.
In addition, in order to obtain more preferably local dimming effect, in the present embodiment, the thickness of substrate 10 is by setting lamp bar 11
Side it is cumulative towards another side, and since reflection mode is adopted in those concave surfaces 1011 and forms area source, it is preferred that an at least concave surface can be made
1011 are set for class minute surface, to improve light reflectance.But depending on use demand, concave surface 1011 can also made for rough surface
When 111 light of point light source exposes to substrate, diffusing reflection phenomenon is formed through coarse concave surface 1011, can also have and reflect light efficiency
Energy.And one optical diaphragm such as diffusion sheet, prismatic lens or brightness enhancement sheet etc. can be set in the light emission side of substrate 10, to adjust substrate
10 reflection lights and 11 light guide of lamp bar.
In the present embodiment, backlight module 1 also has at least one first reflecting element 12, is correspondingly arranged at the one of substrate 10
Side, to reflect light back into substrate 10.Specifically, the first reflecting element 12 can be arranged at the light emission side of substrate 10 adjacent to lamp bar 11,
Thus when lamp bar 11 projects light, part can not comply with the first reflecting element 12 towards the forward light of substrate 10 and be reflected back base
At plate 10, to avoid ray waste.And lamp bar 11 can form incident ray with parallel substrate 10 or vertical substrate 10 and set, Yu Ben
Exemplified by embodiment enters light by the side of the offer parallel substrate 10 of lamp bar 11.First reflecting element 12 corresponds to lamp bar 11 and sets, and can incite somebody to action
Light is reflexed at substrate 10.Wherein, the surface of the first reflecting element 12 also can be class minute surface or rough surface such as concave surface 1011,
To have more preferably reflecting effect.
And to promote reflecting effect, the thickness of the first reflecting element 12 can by 11 side of setting lamp bar towards another side decrescence or gradually
Increase, in other words, the thickness that the first reflecting element 12 is correspondingly arranged 11 region of lamp bar is smaller than or the thickness more than other regions, example
Such as make the region that 12 non-corresponding of the first reflecting element is provided with lamp bar 11 that there is an inclined surface 121, as shown in Figure 2 B, that is, disclose first
The thickness of reflecting element 12 is increased by the one side of setting lamp bar 11 towards opposite side.Or 12 non-corresponding of the first reflecting element is provided with lamp
The region surface of item 11 lays reflection micro-structure 122 etc., to ensure the light of lamp bar 11 are reflected back substrate 10, such as Fig. 2 C institutes
Show.Wherein, inclined surface 121 shown in figure and reflection micro-structure 122 are only a preferably signal, such as inclined surface 121 also can court
It is another to roll tiltedly, 12 thickness of the first reflecting element is made to be reduced by 11 side of setting lamp bar towards another side, and inclined surface 121 or arc surfaced
State, and structure of reflection micro-structure 122 or tool cambered surface etc..And if need to optical diaphragm be set in backlight module 1, with the
Under the structure of one reflecting element 12, by 10 light emission side of optical diaphragm counterpart substrate and 12 top of the first reflecting element can be stacked on.
As shown in figure 3, it is the backlight module front view of one preferred embodiment of the utility model, it is preferred that substrate 10
Any concave surface 1011 is at least connected by a first surface 1012 and one second curved surface 1013 and is formed, and first surface 1012 and
It is different that there is two curved surfaces 1,013 1012 and second curved surface 1013 of first surface of different radius of curvature or any concave surface 1011 to have
Radian, as shown in Figure 3.Such as the concave surface 1011 on the left of Fig. 3, first surface 1012 have phase with the second curved surface 1013
Different radius of curvature R1、R2, 1012 and second curved surface 1013 of first surface of another concave surface 1011 is then with different radian.Thoroughly
The structural adjustment of 1012 and second curved surface 1013 of first surface is crossed, can reach more preferably dimming effect, such as is complied with and point light source
The radius of curvature or radian of 111 distance adjustment 1012 and second curved surface 1013 of first surface, to obtain more accurate light modulation
Efficiency, and improve the outgoing light homogeneity of substrate 10.And each concave surface 1011 is except by 1012 and second curved surface 1013 of first surface
Connecting, it is outer to be formed, even more can further have different radians or the 3rd the 4th curved surface of radius of curvature, with first surface 1012
And second curved surface 1013 connect, radian and the radius of curvature that making each concave surface 1011 has multistage change, and are needed with complying with light extraction
It asks and is adjusted with 11 species of lamp bar carried, and more conducively local dimming control carries out.
In addition, in order to avoid the hot spot phenomenon that substrate 10 generates adjacent to 11 region of lamp bar brightness unevenness, can make wantonly two adjacent
1011 intersection of concave surface formed a cambered surface 103, further, the cambered surface 103 of intersection can be convex globoidal or cancave cambered surface.
As shown in figure 4, it is the side view of one preferred embodiment of the utility model.Except such as foregoing each concave surface 1011 can be by
First surface and the second curved surface connect to being formed outside, and concave surface 1011 can also be at least one first inclined-plane 1015 and one second inclined-plane 1016
Connect to being formed, and the first inclined-plane 1015 and the second inclined-plane 1016 have different angle with horizontal plane respectively, it is oblique with first in this
Face 1015 and the angle of horizontal plane are θ1, the angle on the second inclined-plane 1016 and horizontal plane is θ2Exemplified by illustrate.Similarly, thus tie
Structure can enhance light modulation effect of each concave surface, and promote entirety and go out light quality.Wherein, each concave surface 1011 except can simultaneously all by song
Face or inclined-plane connect to being formed outside, can also make any concave surface 1011 for the structural form formed that connected simultaneously by inclined-plane and curved surface.
As shown in Fig. 5 A, Fig. 5 B and Fig. 6, be one preferred embodiment of the utility model backlight module stereoscopic schematic diagram,
Backlight module application top view and backlight module front view.In the present embodiment, backlight module 1 have one first reflecting element 12 and
One second reflecting element 13 is divided into the opposite sides of substrate 10, and 10 and first reflecting element 12 of substrate and substrate 10 and
Between two reflecting elements 13, lamp bar 11 is respectively equipped with, makes backlight module 1 to enter the structural form of light, and each lamp bar 11 with bilateral
Light ray parallel substrate 10 enter side formed side enter light.Thus when backlight module 1 be applied to larger display when and with compared with
During large area, permeable bilateral enters light mode and entirety is maintained to go out luminous intensity.And through the drive of control 11 point light source 111 of both sides lamp bar
Dynamic sequential, you can the effect of reaching control 101 amount of light of echo area, as shown in Figure 5 B, still, the light extraction form in figure is only used for
Illustrate, not represent actual light extraction.It is preferred that in the present embodiment, the thickness of substrate 10 is divided by the both sides for being correspondingly arranged lamp bar 11
It is not cumulative towards center, to obtain more preferably local dimming effect, and with the concave surface 1011 of substrate 10 by having different radius or arc
The first surface of degree and the second curved surface connect to be formed exemplified by illustrate.
In order to eliminate hot spot phenomenon, for 11 and first reflecting element 12 of lamp bar or the distance of the second reflecting element 13 and substrate
There is corresponding design.As shown in fig. 6, lamp bar 11 is connected setting with the first reflecting element 12, by lamp bar 11 and substrate 10 and first
The structural form that reflecting element 12 is connected with each other except can prevent hot spot phenomenon from generating, while also allows 111 light of point light source in lamp bar 11
Line can be transmitted to farther place and reduce the overall thickness of lamp bar 11.Similarly, lamp bar 11 and the second reflecting element 13 also can be as foregoing
Mode is set, and is no longer repeated in this.Similarly, efficiency is adjusted to promote light, optical film can be added in 10 light emission side of substrate
Piece, and optical diaphragm stacks on 13 top of the first reflecting element 12 and the second reflecting element.
As shown in fig. 7, it is the backlight module front view of one preferred embodiment of the utility model, in the present embodiment, the
One reflecting element 12 and the second reflecting element 13 are also disposed on 10 both sides of substrate, and in 10 and first reflecting element 12 of substrate and substrate
10 and second are respectively equipped with lamp bar 11, the 11 light vertical substrate 10 of lamp bar that corresponding first reflecting element 12 is set between reflecting element 13
Incidence, the 11 light ray parallel substrate incident of lamp bar that corresponding second reflecting element 13 is set.It is by 11 light of a wherein lamp bar is set
10 direction of vertical substrate is incident, you can effectively reduce corresponding first reflecting element, 12 length, reach shorten subsequently applied it is aobvious
The effect of showing device border width.The lamp bar 11 that corresponding first reflecting element 12 is set, can be connected with each other, first with the first reflecting element 12
Reflecting element 12 has a first end 123 and a second end 124, foregoing 11 visible point light source of lamp bar, 111 power or exhibition angular etc.
Condition is arranged at first end 123 or 124 part of second end or the center being arranged between first end 123 and second end 124
Region, and possess a spacing with first end 123 and second end 124, two spacing can be equal or unequal.And similarly, in this
It is cumulative that the thickness of substrate 10 is also respectively facing center by the both sides for being correspondingly arranged lamp bar 11, to obtain more preferably local dimming work(
Effect.In addition, opposing substrate 10 has the lamp bar 11 of glancing incidence light, setting can be connected with the second reflecting element 13 to prevent hot spot
Phenomenon generates, remaining detail characteristic refers to above-described embodiment content.And in the present embodiment, when corresponding second reflecting element 13 is set
The lamp bar 11 put, can when the power of point light source 111 is more than 11 point light source 111 of lamp bar that corresponding first reflecting element 12 is set thereon
Make the first reflecting element 12 identical with the length of the second reflecting element 13.And in the present embodiment, with the concave surface 1011 of substrate 10 by having
The first surface and the second curved surface of different radius or radian connect to be formed exemplified by.Special one is mentioned that, in this present embodiment, first
Reflecting element 12 is arranged in parallel with the second reflecting element 13 to be contour, and still, the first reflecting element 12 is alternatively non-with the second reflecting element 13
It is contour to be arranged in parallel.
As shown in figure 8, it is the backlight module front view of one preferred embodiment of the utility model, it is in this present embodiment, right
Answer the lamp bar 11 that the first reflecting element 12 and the second reflecting element 13 are set that there is identical luminous power or corresponding second reflecting element 13
111 power of point light source when being less than the point light source 111 of corresponding first reflecting element 12, you can be less than the length of the first reflecting element 12
Second reflecting element 13.Cause is when the perpendicular substrate 10 of 11 light of lamp bar of corresponding first reflecting element 12 is incident, the first reflecting element 12
Length can be contracted by, if the length of the second reflecting element 13 is too short at this time, then hot spot phenomenon may be caused to generate.Relatively,
The length of second reflecting element 13 can not also set it is long, in order to avoid increase frame width.It is preferred that the length of the second reflecting element can
For 1.1~3 times of the first reflecting element length.
As shown in figure 9, it is the backlight module front view of one preferred embodiment of the utility model, wherein, in substrate 10
Light emission side can add an optical diaphragm 14 such as diffusion sheet, prismatic lens or brightness enhancement sheet, further to adjust from lamp bar 11
The light sent can be such that light more dissipates through diffusion sheet, and prismatic lens can be and bright by the ray guidance of diffusion to substrate 10
The brightness that degree reinforcing sheet can then improve backlight module 1 is concentrated, and thus adjusts the whole outgoing light homogeneity and efficiency of backlight module 1.
As shown in Figure 10, Figure 11 and Figure 12, it is the display stereoscopic schematic diagram of one preferred embodiment of the utility model, shows
Show device front view and the display front view of another embodiment, and please arranged in pairs or groups again refering to Figure 1B.The utility model also discloses one
The display 2 of kind tool local dimming effect, including a display panel 20 and a backlight module 1.Display panel 20 can be liquid crystal
Panel, and it is arranged at the light emission side of backlight module 1.And backlight module 1 is it has been observed that including substrate 10 and lamp bar 11, substrate 10 has
There is an echo area 101 being disposed adjacent, and each echo area 101 has a concave surface 1011, each concave surface 1011 connects setting.Lamp bar 11 has
Point light source 111, and 10 one side of counterpart substrate is set, for throw light to substrate 10, to be reflected to form via each concave surface 1011
Light extraction.Through the driver' s timing for controlling each point light source 111, you can adjust the amount of light of each echo area 101, and then region tune
The effect of light, using for local dimming are presented as shown in Figure 1B.Display 2 is through the backlight for omitting setting light-guide device as a result,
Module 1 can effectively reduce holistic cost, weight and thickness, while still possess splendid light-out effect.Further, thoroughly
Cross the dynamic control of point light source 111, you can allowing the echo area 101 of substrate 10, being formed at each region has with respect to display panel 20
The effect of supplying light state, reach local dimming of different emitting brightness.Similarly, at least concave surface 1011 that can make substrate 10 is
Class minute surface is set, and to improve light reflectance, and the thickness of substrate 10 is cumulative towards opposite side by the one side of setting lamp bar 11, to obtain
It obtains and more preferably dims efficiency, and backlight module 1 also has at least one first reflecting element 12, is correspondingly arranged at the one side of substrate 10,
To reflect light back into substrate 10.In addition, it may also set up optical diaphragm 14 between display panel 20 and substrate 10 or incited somebody to action
Optical diaphragm 14 stacks on the top of the first reflecting element 12, and make optical diaphragm 14 be located at 20 and first reflecting element 12 of display panel it
Between, as shown in figure 12, give the light extraction of display panel 20 to be in further to adjust the light sent from lamp bar 11 and providing
It is existing.Remaining thin portion technical characteristic refers to foregoing teachings, is repeated no more in this.
As shown in Fig. 2 B~Fig. 8, backlight module 1 can have a variety of different embodiments, as shown in Fig. 2 B and Fig. 2 C, the
One reflecting element 12 can comply with 11 installation position of lamp bar and have inclined surface 121 or lay reflection micro-structure 122 etc..Wherein, base
Any concave surface 1011 of plate is at least connected by a first surface 1012 and one second curved surface 1013 and is formed, and first surface 1012
Have with first surface 1012 and second curved surface 1013 of second curved surface 1013 with different radius of curvature or any concave surface 1011
Different radian, and can make two adjacent 1011 intersections of concave surface is appointed to form a cambered surface 103.And concave surface 1011 can also be at least
One first inclined-plane 1015 and one second inclined-plane 1016 connect to being formed, and the first inclined-plane 1015 and the second inclined-plane 1016 respectively with level
Face has different angle, as shown in Figures 3 and 4.Remaining thin portion technical characteristic, refers to foregoing teachings, is repeated no more in this.
Or as shown in Fig. 5 A~Fig. 6, backlight module 1 can have the first reflecting element 12 and the second reflecting element 13, be divided into
The opposite sides of substrate 10, and between 10 and second reflecting element 13 of 10 and first reflecting element 12 of substrate and substrate, be respectively equipped with
Lamp bar 11, it is the structural form for entering light with bilateral level to make backlight module 1, and to obtain preferable dimming effect, substrate 10
Thickness can be cumulative towards another side by being correspondingly arranged 11 side of lamp bar.And to eliminate hot spot phenomenon, for 11 and first reflecting element of lamp bar
12 and the distance of substrate 10 also have corresponding design, such as lamp bar 11 is made to be connected and set with the first reflecting element 12 and substrate 10 respectively
It puts, by the structural form (as shown in Figure 6) that lamp bar 11 and 10 and first reflecting element 12 of substrate are connected with each other, reaches elimination hot spot
The effect of phenomenon.Remaining thin portion technical characteristic, refers to foregoing teachings, is repeated no more in this.
Or as shown in fig. 7, the first reflecting element 12 and the second reflecting element 13 of backlight module 1 are arranged at 10 both sides of substrate, and
Lamp bar 11 is respectively equipped between 10 and second reflecting element 13 of 10 and first reflecting element 12 of substrate and substrate, corresponding first is anti-
Penetrate the 11 light ray parallel substrate of lamp bar that the 11 light vertical substrate of lamp bar 10 of the setting of part 12 is incident, and corresponding second reflecting element 13 is set
10 is incident.It is incident by 10 direction of setting 11 light vertical substrate of a wherein lamp bar, you can corresponding first reflecting element 12 of reduction
Length reduces the border width of display 2, and to obtain preferable dimming effect, the thickness of substrate 10 can be by being correspondingly arranged
11 side of lamp bar is cumulative towards another side.Similarly, in the incident lamp bar 11 of this light ray parallel substrate 10 setting with respect to the second reflecting element 13
Form is put, can also refer to content shown in Fig. 5 A~Fig. 7.Or as shown in figure 8, when corresponding first reflecting element 12 and the second reflecting element 13
It is anti-that there is the lamp bar 11 of setting 111 power of point light source of identical luminous power or corresponding second reflecting element 13 to be less than corresponding first
When penetrating the point light source 111 of part 12, you can the length of the first reflecting element 12 is made to be less than the second reflecting element 13.Remaining thin portion technology is special
Sign, refers to foregoing teachings, is repeated no more in this.
In conclusion the backlight module of tool local dimming effect that the utility model discloses, through the concave design of substrate,
It need not separately add and put the optical elements such as light guide plate, and can pass through reflection mode makes incident ray form uniform area light source, and take
Driver' s timing with dynamic control point light source, you can the amount of light of each echo area is adjusted, to provide display under each time-histories
Region light extraction demand promotes the contrast of picture and display efficiency.The backlight module and display that the utility model discloses simultaneously,
Because light guide plate assembly can be omitted, thus product cost, weight and thickness can be reduced, meet market today demand.Also, substrate
Concave surface comply with lamp bar species and whole installation condition, and with corresponding structure design, to provide going out for being more uniformly distributed
Light transmittance efficiency.In addition, reflecting element is may also set up in backlight module, effectively to promote the utilization rate of lamp bar light.
Although the foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
On the premise of the principle and essence without departing substantially from the utility model, many changes and modifications may be made,
But these change and modification each fall within the scope of protection of the utility model.
Claims (10)
1. a kind of backlight module for having local dimming effect, for being applied to a display, which is characterized in that the tool local dimming
The backlight module of effect includes：
One substrate has several echo areas for being disposed adjacent, and respectively the echo area has a concave surface, and respectively the concave surface connects setting；
And
An at least lamp bar, has several point light sources and the corresponding substrate at least one side is set, for throw light to the substrate, with
Light extraction is formed via the respectively concave reflection, wherein, through the driver' s timing of each point light source of control, to adjust each echo area
Amount of light, and then the effect of local dimming.
2. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that any concave surface is at least by one
First surface and one second curved surface connect to being formed, and the first surface has different radius of curvature with second curved surface.
3. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that any concave surface is at least by one
First surface and one second curved surface connect to being formed, and the first surface has different radian with second curved surface.
4. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that any concave surface is at least by one
First inclined-plane and one second inclined-plane connect to being formed, and first inclined-plane has different folder with horizontal plane respectively with second inclined-plane
Angle.
5. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that appoint two adjacent concave surface phases
A cambered surface is formed at friendship.
6. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that the thickness of the substrate is by corresponding to
The one side for setting the lamp bar is cumulative towards opposite side.
7. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that the tool local dimming effect
Backlight module also has an optical diaphragm, which is arranged on the light emission side of the substrate.
8. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that the tool local dimming effect
Backlight module also there is at least one first reflecting element, first reflecting element to be correspondingly arranged at the one side of the substrate, for light is anti-
It is emitted back towards the substrate.
9. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that the tool local dimming effect
Backlight module also has one first reflecting element and one second reflecting element, is divided into the opposite sides of the substrate, and in the substrate with
The lamp bar, the light ray parallel of those lamp bars substrate are respectively equipped between first reflecting element and the substrate and second reflecting element
Incidence forms side and enters light.
10. the backlight module of tool local dimming effect as described in claim 1, which is characterized in that the tool local dimming effect
Backlight module also there is one first reflecting element and one second reflecting element, be divided into the both sides of the substrate, and in the substrate with should
The lamp bar, the lamp that corresponding first reflecting element is set are respectively equipped between first reflecting element and the substrate and second reflecting element
The vertical substrate incident of light, the lamp bar light ray parallel substrate incident that corresponding second reflecting element is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720683716.5U CN207408713U (en) | 2017-06-13 | 2017-06-13 | Has the backlight module of local dimming effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720683716.5U CN207408713U (en) | 2017-06-13 | 2017-06-13 | Has the backlight module of local dimming effect |
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| Publication Number | Publication Date |
|---|---|
| CN207408713U true CN207408713U (en) | 2018-05-25 |
Family
ID=62322254
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720683716.5U Active CN207408713U (en) | 2017-06-13 | 2017-06-13 | Has the backlight module of local dimming effect |
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| Country | Link |
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| CN (1) | CN207408713U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188778A (en) * | 2018-10-31 | 2019-01-11 | 京东方科技集团股份有限公司 | Backlight module, display device and its driving method |
| CN112967644A (en) * | 2020-11-13 | 2021-06-15 | 重庆康佳光电技术研究院有限公司 | Correction method and device for tiled display device, storage medium and electronic device |
| CN115013754A (en) * | 2021-03-05 | 2022-09-06 | 北京字节跳动网络技术有限公司 | Light-emitting module and desk lamp |
-
2017
- 2017-06-13 CN CN201720683716.5U patent/CN207408713U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188778A (en) * | 2018-10-31 | 2019-01-11 | 京东方科技集团股份有限公司 | Backlight module, display device and its driving method |
| CN112967644A (en) * | 2020-11-13 | 2021-06-15 | 重庆康佳光电技术研究院有限公司 | Correction method and device for tiled display device, storage medium and electronic device |
| CN115013754A (en) * | 2021-03-05 | 2022-09-06 | 北京字节跳动网络技术有限公司 | Light-emitting module and desk lamp |
| CN115013754B (en) * | 2021-03-05 | 2023-06-06 | 北京字节跳动网络技术有限公司 | Light-emitting module and desk lamp |
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