CN110187563A - A kind of backlight module, display module and display device - Google Patents
A kind of backlight module, display module and display device Download PDFInfo
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- CN110187563A CN110187563A CN201910569478.9A CN201910569478A CN110187563A CN 110187563 A CN110187563 A CN 110187563A CN 201910569478 A CN201910569478 A CN 201910569478A CN 110187563 A CN110187563 A CN 110187563A
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- lamp plate
- backlight module
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- astigmatism
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
It includes luminescent screen that the embodiment of the present application, which provides a kind of backlight module, display module and display device, backlight module, and the astigmatism plate of the light emission side positioned at luminescent screen.Luminescent screen includes lamp plate and multiple light sources, and multiple light sources are located at the first surface of lamp plate.First surface is provided with N number of range sensor, range sensor is for detecting lamp plate and astigmatism plate in the spacing H of different location1, H2... ..., Hn... ..., HN.The second surface of lamp plate is provided with M distance adjusting means, to adjust the spacing of lamp plate and astigmatism plate.Work as HnWith HmWhen unequal, then by the adjusting of distance adjusting means to adjust Hn.Wherein, HmTarget spacing between lamp plate and astigmatism plate.The embodiment of the present application by range sensor and distance adjusting means, detect and adjust lamp plate everywhere with the spacing H of astigmatism platen, enable backlight module uniformly light-emitting.
Description
[technical field]
This application involves field of display technology more particularly to a kind of backlight modules, display module and display device.
[background technique]
Backlight module provides equal white light to display panel, and display panel is enabled to show image.
Specifically, the lamp plate of backlight module is equipped with multiple light sources, and the white light that light source issues becomes after light mixing and astigmatism
For equal white light, projected from the light emission side of backlight module.
Intensity is identical when reaching astigmatism plate for the white light for allowing each light source to issue, it is desirable that at the spacing of lamp plate and astigmatism plate
Locate equal, but during making and using backlight module, the spacing being easy to appear between lamp plate and astigmatism plate is uneven.
When the spacing of lamp plate in backlight module and astigmatism plate is uneven, backlight module is unable to uniformly light-emitting, so that display panel is shown
Image it is also uneven, influence the display effect of display panel.
For example, for curved face display panel, curved surface backlight module is needed to provide equal white light.In assembling, generally
The direct brake forming of mold is used to curved surface backlight module, since curved surface backlight module is there are curvature, and lamp plate is plate, with
When the iron-clad fitting of curved surface backlight module, there may be differences for the spacing of lamp plate and astigmatism plate, so as to cause curved surface backlight module
It is unable to uniformly light-emitting.
[summary of the invention]
In view of this, the embodiment of the present application provides a kind of backlight module, display module and display device, backlight module packet
Luminescent screen and the astigmatism plate positioned at lamp plate light emission side are included, luminescent screen includes lamp plate and multiple lamp sources positioned at lamp plate first surface.
The first surface of lamp plate is additionally provided with range sensor, to detect lamp plate and astigmatism plate in the spacing of different location.The second of lamp plate
Surface is equipped with distance adjusting means, to adjust the spacing of lamp plate and astigmatism plate.Pass through range sensor and distance adjusting means, inspection
It surveys and adjusts lamp plate everywhere with the spacing of astigmatism plate, enable backlight module uniformly light-emitting.
On the one hand, the embodiment of the present application provides a kind of backlight module, including,
Luminescent screen, and the astigmatism plate of the light emission side positioned at the luminescent screen；
The luminescent screen includes lamp plate and multiple light sources, and the multiple light source is located at the first surface of the lamp plate；
The first surface is provided with N number of range sensor, the range sensor is for detecting the lamp plate and institute
Astigmatism plate is stated in the spacing H of different location1, H2... ..., Hn... ..., HN；Wherein, n, N are positive integer, and n≤N；
The second surface of the lamp plate is provided with M distance adjusting means, to adjust the lamp plate and the astigmatism
The spacing of plate；Wherein, the second surface is the back side of the first surface, and M is positive integer；
Work as HnWith HmWhen unequal, then by the adjusting of the distance adjusting means to adjust Hn；Wherein, HmFor the lamp
Target spacing between plate and the astigmatism plate.
On the other hand, the embodiment of the present application provides a kind of display module, and the display module includes above-mentioned backlight module.
Another aspect, the embodiment of the present application provide a kind of display device, and the display device includes above-mentioned display module.
A kind of backlight module, display module and display device provided by the embodiments of the present application, backlight module include luminescent screen
With the astigmatism plate of the light emission side of luminescent screen.Luminescent screen includes lamp plate and multiple light sources, after the light that light source issues reaches astigmatism plate,
It is scattered by astigmatism plate, becomes equal white light.N number of range sensor is arranged in same surface where light source, come detect lamp plate and
The spacing H of astigmatism platen.M distance adjusting means are arranged in the back side on surface where light source, to adjust between lamp plate and astigmatism plate
Away from Hn.So that multiple light sources are equal with the spacing of astigmatism plate, the corresponding light mixing distance of each light source is identical, and backlight module can be equal
It is even to shine.
[Detailed description of the invention]
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
A kind of structural schematic diagram for the backlight module that Fig. 1 is proposed by the embodiment of the present application；
Fig. 2 is a kind of schematic cross-section in Fig. 1 along dotted line A-A '；
Another structural schematic diagram for the backlight module that Fig. 3 is proposed by the embodiment of the present application；
Fig. 4 is the schematic cross-section in Fig. 3 along dotted line B-B '；
Fig. 5 is display panel in Fig. 3 along the structural schematic diagram of Z-direction；
The Method And Principle schematic diagram for the measurement bending degree that Fig. 6 is proposed by the embodiment of the present application；
Fig. 7 is another schematic cross-section in Fig. 1 along dotted line A-A '；
Fig. 8 is a kind of enlarged diagram in the region M1 in Fig. 2；
Fig. 9 is another enlarged diagram in the region M1 in Fig. 2；
Figure 10 is another enlarged diagram in the region M1 in Fig. 2；
Figure 11 is the structural schematic diagram of display module provided by the embodiment of the present application；
Figure 12 is the structural schematic diagram of display device provided by the embodiment of the present application.
[specific embodiment]
In order to better understand the technical solution of the application, the embodiment of the present application is retouched in detail with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Base
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall in the protection scope of this application.
The term used in the embodiment of the present application is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The application.In the embodiment of the present application and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
In the description of this specification, it is to be understood that described in the claim of this application and embodiment " substantially ",
The words such as " approximation ", " about ", " about ", " substantially " " generally ", refer within the scope of reasonable technological operation or tolerance model
In enclosing, can generally it accept, rather than an exact value.
It will be appreciated that though may describe to show using term first, second, third, etc. in the embodiment of the present application
Area, but these viewing areas should not necessarily be limited by these terms.These terms are only used to for being distinguished from each other out viewing area.For example, not taking off
In the case where the embodiment of the present application range, the first viewing area can also be referred to as the second viewing area, similarly, the second viewing area
The first viewing area can also be referred to as.
In order to clearly demonstrate the importance of backlight module uniformly light-emitting, the structure of display module is illustrated below.
Display module includes display panel and backlight module, and display panel is located at the emission side of backlight module.
Display panel includes the array substrate being oppositely arranged and color membrane substrates, and array substrate is close to the one of backlight module
Side.It is equipped with liquid crystal layer between array substrate and color membrane substrates, is marked with liquid crystal molecule in liquid crystal layer.
Array substrate is equipped with the thin film transistor (TFT) of array distribution, can generate electric field to drive liquid crystal molecule to turn to, no
It is distinct to the transmitance of light with the liquid crystal molecule turned to.
Color membrane substrates are equipped with color blocking layer, and color blocking layer includes the color blocking unit of array distribution, color blocking unit and film crystal
It manages corresponding.
It is not homochromy since the steering that the corresponding thin film transistor (TFT) driving liquid crystal molecule of different color blocking units carries out is different
The light transmittance for hindering the liquid crystal molecule of unit corresponding region is different.After the equal white light that backlight module issues passes through liquid crystal layer, transformation
For the different white light of intensity.
The color of different color blocking units in color blocking layer is different, and white light can be become to corresponding color blocking unit corresponding color
Glory, therefore the different white light of intensity passes through the glory that just will become varying strength, different colours after color blocking layer, forms display figure
Picture.
Based on above description, it is recognised that display panel is that passive type shines, the display effect of display panel is by backlight
The influence of mould group, the white light that backlight module issues is uneven, passes through liquid crystal layer, after color blocking layer, and the display image of formation is not yet
Uniformly, the display effect of display panel is influenced.
In order to clearly demonstrate the principle that backlight module forms equal white light, the structure of backlight module is said below
It is bright.
Backlight module includes luminescent screen, and luminescent screen includes lamp plate and the multiple light sources on lamp plate, is placed on lamp plate
For the cabling of light source power supply.Light source cannot directly issue equal white light, therefore backlight module further includes astigmatism plate, and astigmatism plate is located at
The emission side of luminescent screen.
There is interval between astigmatism plate and luminescent screen, the light source of luminescent screen issues white light, needs to get to across interval
Astigmatism plate.During passing through interval, the white light that different light sources issue carries out light mixing.
White light after light mixing passes through astigmatism plate, carries out astigmatism.There is astigmatism particle in astigmatism plate, light can be carried out
Scattering, refraction, reflection, so that light becomes uniform.It is uniformly white to convert the white light of the multiple light sources sending on lamp plate to
Light.
But backlight module, in manufacture or use process, the spacing of different location can between astigmatism plate and luminescent screen
Difference can occur, the white light for causing light source to issue is by after light mixing, intensity is distinct.So that the light that backlight module issues is not
Uniformly, so that the image that shows of display panel is also uneven, the display effect of display panel is influenced.
To solve the above-mentioned problems, the embodiment of the present application proposes a kind of backlight module.Fig. 1 is mentioned by the embodiment of the present application
A kind of structural schematic diagram of backlight module out.Fig. 2 is a kind of schematic cross-section in Fig. 1 along dotted line A-A '.Such as Fig. 1 and Fig. 2
Shown, backlight module includes luminescent screen 110, and the astigmatism plate 210 of the light emission side positioned at luminescent screen.Luminescent screen 110 includes lamp
Plate 111 and multiple light sources 112, light source 112 are located at the first surface of lamp plate 111.Wherein, first surface is lamp plate 111 close to scattered
The surface of the side of tabula rasa 210.
First surface is provided with N number of range sensor 113, range sensor 113 is for detecting lamp plate 111 and astigmatism plate
210 different location spacing H1, H2... ..., Hn... ..., HN.Wherein, n, N are positive integer, and n≤N.
The second surface of lamp plate 111 is provided with M distance adjusting means 114, to adjust lamp plate 111 and astigmatism plate
210 spacing.Wherein, second surface is the back side of first surface, and M is positive integer.
Work as HnWith HmWhen unequal, then by the adjusting of distance adjusting means 114 to adjust Hn.Wherein, HmFor lamp plate 111
Target spacing between astigmatism plate 210.
In the backlight module that the embodiment of the present application is proposed, there is interval between luminescent screen 110 and astigmatism plate 210.Specifically
It is the presence of interval between lamp plate 111 and astigmatism plate 210, the light issued positioned at the first surface multiple light sources 112 of lamp plate 111,
In interval procedure, light mixing is carried out.It is then passed through astigmatism plate 210 after light mixing, the astigmatism particle in astigmatism plate 210 is scattered to passing through
The light of tabula rasa 210 such as is scattered, reflects, reflecting at the processing, so that the light after passing through astigmatism plate 210 becomes uniform.
In order to enable the distance that the light that different light sources 112 issue passes through interval is identical, light intensity is identical when light mixing, in lamp
N number of range sensor 113 is arranged to detect lamp plate 111 and astigmatism plate 210 in the spacing of different location in the first surface of plate 111.
M distance adjusting means are set in the second surface of lamp plate 111, to adjust the spacing of lamp plate 111 and astigmatism plate 210, so that lamp
The spacing H of plate 111 and astigmatism plate 210 in different location1, H2... ..., Hn... ..., HNWith target spacing HmIt is consistent.In turn
So that the distance that the light that different light sources 112 issue passes through interval is identical, light intensity when light mixing is identical, passes through astigmatism plate 210
It is capable of forming equal white light later.
It should be strongly noted that target spacing H between lamp plate 111 and astigmatism plate 210mIt can be preset fixed number
Value, the i.e. corresponding design value of backlight module.It is also possible to by formulaIt calculates and determines.
It is appreciated that working as target spacing HmBy formulaWhen calculating determining, due in each backlight module
The spacing H of different location between lamp plate 111 and astigmatism plate 2101, H2... ..., Hn... ..., HNDifference, therefore between corresponding target
Away from HmAlso not identical.
In above two target spacing HmDetermination method in, can allow lamp plate by the way of preset fixed numbers
The spacing H of different location between 111 and astigmatism plate 2101, H2... ..., Hn... ..., HN, it is consistent always with design value, into
And the intensity for the equal white light for allowing backlight module to issue remains unchanged, so that the image that display panel is shown is not only uniform, but also
Brightness remains unchanged.
Using formula calculate it is determining by the way of can allow the spacing H of different location between lamp plate 111 and astigmatism plate 2101,
H2... ..., Hn... ..., HNWith target spacing HmNumerically gap is smaller, and each distance adjusting means 114 need to carry out smaller
Adjusting can allow backlight module issue equal white light so that the image uniform that display panel is shown.
In addition, backlight module provided by the embodiment of the present application can also be curved, for mentioning to curved face display panel
For equal white light.
Another structural schematic diagram for the backlight module that Fig. 3 is proposed by the embodiment of the present application.Fig. 4 is in Fig. 3 along dotted line
The schematic cross-section of B-B '.As shown in Figure 3 and Figure 4, backlight module includes luminescent screen 110, and the light emission side positioned at luminescent screen
Astigmatism plate 210.Luminescent screen 110 includes lamp plate 111 and multiple light sources 112, and light source 112 is located at the first surface of lamp plate 111, lamp
Plate 111 and astigmatism plate 210 are bent to the emission side of luminescent screen 110 respectively.Wherein, first surface is lamp plate 111 close to scattered
The surface of the side of tabula rasa 210.
First surface is provided with N number of range sensor 113, range sensor 113 is for detecting lamp plate 111 and astigmatism plate
210 different location spacing H1, H2... ..., Hn... ..., HN.Wherein, n, N are positive integer, and n≤N.
The second surface of lamp plate 111 is provided with M distance adjusting means 114, to adjust lamp plate 111 and astigmatism plate
210 spacing.Wherein, second surface is the back side of first surface, and M is positive integer.
Work as HnWith HmWhen unequal, then by the adjusting of distance adjusting means 114 to adjust Hn.Wherein, HmFor lamp plate 111
Target spacing between astigmatism plate 210.
Fig. 5 is display panel in Fig. 3 along the structural schematic diagram of Z-direction.As shown in figure 5, when backlight module bending, it is multiple
The distributing position of light source 112 forms the first array, and the first array includes first direction and second direction.Wherein, first direction is
The bending direction of lamp plate 111, second direction intersect with first direction.The distributing position of M range sensor 113 forms second gust
Column, the arrangement mode of second array and the first array are similar, equally include above-mentioned first direction and second direction.M distance
Sensor 113 is located at the interval region of multiple light sources 112 in a first direction.That is, in a first direction, Distance-sensing
Interval region of the device 113 between light source 112.
Since backlight module is bent, in a first direction, the spacing between the lamp plate 111 and astigmatism plate 210 of different location
Difference is larger.The interval region of light source 112 in a first direction is arranged in range sensor 113, enables backlight module
The spacing H between the lamp plate 111 and astigmatism plate 210 of obtained different location is detected according to range sensor 113n, accurately
Spacing between the light source 112 and astigmatism plate 210 of different location reduces error.
It is appreciated that the bending degree of backlight module is bigger, lamp plate 111 and astigmatism plate 210 are in production and use process
It is more difficult to keep the spacing at various locations identical, needs that lamp plate 111 is adjusted.It specifically, can by inventor's test
Know, when backlight module meets formulaWhen, backlight module is easy to occur in a first direction local curved
Song causes the surface irregularity of lamp plate 111.Wherein, θ is the corresponding angle of two neighboring light source 112 in a first direction.X is
In a first direction, the number of the light source 112 at the interval between two neighboring range sensor 113.R is corresponding for astigmatism plate 210
Curvature.
Formula is specifically described belowPrinciple, backlight module that the embodiment of the present application is proposed is logical
Adjustment lamp plate 111 and astigmatism plate 210 are crossed in the spacing of different location, to guarantee the bending degree one of lamp plate 111 and astigmatism plate 210
It causes.Since the backlight module in the embodiment of the present application is that lamp plate 111 is adjusted, actually using the curved of astigmatism plate 210
The bending degree of lamp plate 111 is adjusted and is arrived as astigmatism plate 210 by reference of the Qu Chengdu as 111 bending degree of lamp plate, thus
Using the bending degree of astigmatism plate 210 as the bending degree of entire backlight module.
The Method And Principle schematic diagram for the measurement bending degree that Fig. 6 is proposed by the embodiment of the present application.As shown in fig. 6, using
Curvature of the curvature r of astigmatism plate 210 as the lamp plate 111 after adjusting, that is, the target curvature of lamp plate 111.Curvature r is needle
To the tangent directional angle that some is put on curve to the rotation rate of arc length, the inverse of curvature r is referred to as radius of curvature.Generally,
Bent curvature of a curve refers to that the radius for the circle being formed by, curvature 700R refers to that radius is when assuming a part that the curve is circle
Circle institute the degree of bending of 0.7m, curvature 1000R refer to radius for circle institute the degree of bending of 1m.
In the design process of backlight module, in order to allow backlight module that can issue equal white light, lamp plate 111 and astigmatism plate
210 curvature is designed to identical.But actual fabrication and in use, the actual curvature of lamp plate 111 be likely to occur in advance
The different situation of the curvature of design needs to adjust lamp plate 111 using range sensor 113 and distance adjusting means 114.Make
It is identical as the spacing of astigmatism plate 210 to obtain lamp plate 111, it is identical as the curvature of astigmatism plate 210 also to allow for lamp plate 111.
Specifically, lamp plate 111 lesser for the curvature being pre-designed, bending degree is larger, in actual fabrication and use
During, it is easier to occur local buckling in a first direction, needs to carry out spacing adjustment.And the biggish lamp plate of region curvature
111, bending degree is smaller, is less likely occur local buckling in a first direction, no setting is required range sensor 113 and distance
Regulating device 114 carries out spacing adjustment.
The balancing method for the bending degree that the embodiment of the present application is proposed is used in the design process of display panel, according to lamp
The default bending degree of plate 111, to judge during actual fabrication and use, whether lamp plate 111, which needs to be arranged distance, is passed
Sensor 113, and need that range sensor 113 how is arranged.
For ease of description, the curvature using the curvature r of astigmatism plate 210 as the lamp plate 111 being pre-designed, Lai Jinhang lamp
The calculating of the bending degree of plate 111, and then judge whether to need to be arranged range sensor 113, and how Distance-sensing is arranged
Device 113 is specifically exactly the quantity for determining the light source 112 being arranged between two neighboring range sensor 113.
As shown in fig. 6, assisting counting using a right angled triangle in order to which the bending degree to lamp plate 111 is measured
Calculate the bending degree of lamp plate 111.Using the center of circle of the corresponding circle of the curvature of lamp plate 111 as first acute angle of right angled triangle
Vertex, then the distance of the vertex to lamp plate 111 is exactly the radius of the corresponding circle of curvature of lamp plate 111.
In a first direction, the corresponding central angle of two neighboring light source 112 is θ, two neighboring Distance-sensing on lamp plate 111
The number for the light source 112 being spaced between device 113 is X, then the corresponding central angle of two neighboring range sensor 113 is X θ, it will
First acute angle of the corresponding central angle X θ of two neighboring range sensor 113 as right angled triangle.Use first distance
Right-angled apices of the sensor 113 as right angled triangle, using the line of the range sensor 113 and the center of circle, and circle is at this
Tangent line at range sensor 113, as two right-angle sides of right angled triangle, then second range sensor 113 is in place
In on the bevel edge of the right angled triangle.
According to trigonometric function formula it is recognised thatBevel edge for right angled triangle in Fig. 6 is long,For
The difference of bevel edge and right-angle side.When X θ is identical,Bigger, then the bending degree of lamp plate 111 is bigger.And for song
Rate is the lamp plate 111 of r, and after the corresponding central angle θ of two neighboring light source 112 has been determined, X is bigger,Also bigger.
In order to determine the reasonable value of X, it can constantly increase the numerical value of X since 1, not stop to calculate correspondingSize.
WhenWhen, illustrate that the quantity of the light source 112 between two neighboring range sensor 113 may be used also
To increase, that is, increases the numerical value of X, continue to calculate.WhenWhen, illustrate two neighboring range sensor 113
Between the quantity of light source 112 reached reasonable value.
It should be noted that for lamp plate 111, when X is maximized, i.e. X has reached the total of light source 112 on first direction
Number,Then illustrate lamp plate 111 in the case where curvature is r, a possibility that bending in a first direction
Very little, no setting is required range sensor 113.
For example, lamp plate 111 shares 20 light sources along first direction, in order to determine how on lamp plate 111 setting away from
From sensor 113, hypothesis calculating is first carried out.Assuming that X is equal to 4, i.e., the light source being spaced between two neighboring range sensor 113
112 number is 4,Assuming that X is equal to 5, i.e., the light being spaced between two neighboring range sensor 113
The number in source 112 is 5,So it was determined that range sensor 113, phase are arranged on lamp plate 111
The number for the light source 112 being spaced between adjacent two range sensors 113 is 5.
Further, in the above example, it is assumed that X is equal to 20, and (20 be the light source 112 of lamp plate 111 in a first direction
Sum) when,Illustrate the bending degree very little of lamp plate 111, lamp plate 111 part occurs along first direction
A possibility that bending very little, range sensor 113 can be not provided with.
Based on aforementioned to formulaPrinciple explanation, below to the model of the relevant parameter in formula
It encloses and is illustrated.The corresponding curvature r general satisfaction 700R≤r≤1000R of astigmatism plate 210, i.e. the one of the predetermined curvature of lamp plate 111
As meet 700R≤r≤1000R.
In addition, along first direction, the spacing between two adjacent light sources 112 is D, 0mm < D≤30mm, adjacent two
The corresponding angle theta of a light source 112, then can be calculated according to space D and curvature r.Between two neighboring range sensor 113
There are X light source 112,4≤X≤10.
When backlight module meets above-mentioned formula and parameter area, range sensor 113 can preferably detect different location
Lamp plate 111 and astigmatism plate 210 spacing Hn, the spacing H of lamp plate 111 and astigmatism plate 210 is adjusted for distance adjusting means 114nIt mentions
For data reference.
The aforementioned explanation to planar backlight mould group and bending backlight module, the backlight that only the embodiment of the present application is proposed
The example of mould group shape, not as the limitation to backlight module shape.In fact, invention structure proposed in the embodiment of the present application
Think, backlight module can be enabled in the backlight module of any shape, for adjusting the spacing of lamp plate 111 and astigmatism plate 210
Issue equal white light.
In addition, for the ease of distance adjusting means 114 to lamp plate 111 and astigmatism plate 210 different location spacing H1,
H2... ..., Hn... ..., HNIt is adjusted, the embodiment of the present application proposes a kind of possible implementation, can be used for institute above-mentioned
Have in embodiment.For ease of description, it is illustrated based on the backlight module in Fig. 1, does not constitute the limit to the embodiment of the present application
System.
As shown in fig. 7, Fig. 7 is another schematic cross-section in Fig. 1 along dotted line A-A '.The quantity N of range sensor 113
It is equal with the quantity M of distance adjusting means, and each range sensor 113 is corresponding with the position of each distance adjusting means 114.
To so that the numerical value H that distance adjusting means 114 are directly detected according to corresponding range sensor 113n, with
Target spacing HmDifference, to the spacing H of lamp plate 111 and astigmatism plate 210nIt is adjusted, so that backlight module adjusted meets
HnWith HmIt is equal.
In order to realize the spacing H to lamp plate 111 and astigmatism plate 210nIt is adjusted, the embodiment of the present application proposes distance and adjusts
Several possible implementations of regulating device 114, can be used in aforementioned all embodiments, are mentioned below to the embodiment of the present application
Distance adjusting means 114 out are specifically described.
Fig. 8 is a kind of enlarged diagram in the region M1 in Fig. 2.As shown in figure 8, distance adjusting means 114 include pressure group
Part 310 and cushion 320, cushion 320 is between pressure assembly 310 and lamp plate 111.Specifically, pressure assembly 310 includes
First movement portion 311, interconnecting piece 312 and the first fixed part 313, the first fixed part 313 carry out on the second surface of lamp plate 111
It is fixed, and in z-direction, the first fixed part 313 at least partly covers cushion 320.Wherein, Z-direction is going out for backlight module
Penetrate the opposite direction of light direction.
First movement portion 311 is located at the first side of the fixed part 313 far from cushion 320, has on the first fixed part 313
Aperture, interconnecting piece 312 passes through aperture, and interconnecting piece 312 connects first movement portion 311 along the first end of Z-direction.
First fixed part 313 covers cushion 320, and cushion 320 is fixed.First movement portion 311 and first consolidates
Determine to relatively move between portion 313, band rotation connection 312 is mobile, so that interconnecting piece 312 squeezes cushion 320, and then squeezes lamp plate
111 second surface adjusts the lamp plate 111 and astigmatism of 114 corresponding position of distance adjusting means so that lamp plate 111 generates deformation
The spacing H of plate 210n。
It should be noted that can be certainly for the relative movement between first movement portion 311 and the first fixed part 313
Dynamic control, for example, receiving the numerical value H that range sensor 113 detects by a control modulenAfterwards, by processing, control is issued
Signal processed, to control the relative movement between first movement portion 311 and the first fixed part 313, certainly, control module can be collection
It in distance adjusting means 114, can also be not integrated into distance adjusting means 114, and be located in other devices, such as show
In the master chip of device；It is also possible to manually adjust, for example, user can detect numerical value H according to range sensor 113nInto
Row manually adjusts.
Further, Fig. 9 is another enlarged diagram in the region M1 in Fig. 2.As shown in figure 9, on the first fixed part 313
Aperture there is internal screw thread, there is external screw thread, internal screw thread mutually agrees with external screw thread, and interconnecting piece 312 can be on interconnecting piece 312
Rotation in the aperture of first fixed part 313.First movement portion 311 is rotated with rotation connection 312, so that it may allow interconnecting piece
312 second end squeezes cushion 320 along Z-direction.And then the second surface of lamp plate 111 is squeezed, so that lamp plate 111 generates shape
Become, adjusts the lamp plate 111 of 114 corresponding position of distance adjusting means and the spacing H of astigmatism plate 210n。
The elastic force that lamp plate 111 is generated due to being squeezed is to act on interconnecting piece 312 along the opposite direction of Z-direction, is adopted
The structure agreed with screw thread, first movement portion 311, which carries out rotation, could allow interconnecting piece 312 to move along Z-direction, therefore lamp plate
111 elastic force generated can not allow interconnecting piece 312 to move along the opposite direction of Z-direction.In addition, the structure that screw thread agrees with is for interconnecting piece
312 distance controllings that move along Z-direction are more accurate, so that the spacing to lamp plate 111 and astigmatism plate 210 adjusts accurate and effective.
In addition, Figure 10 is the region M1 in Fig. 2 the embodiment of the present application also provides another structure of pressure assembly 310
Another enlarged diagram.As shown in Figure 10, pressure assembly 310 include the second moving portion 314 and the second fixed part 315, second
Fixed part 315 is fixed on the second surface of lamp plate 111.Second moving portion 314 has magnetism, 315 energy of the second fixed part
Magnetic field is enough generated, the second moving portion 314 of driving squeezes cushion 320 along Z-direction.Wherein, Z-direction is the emergent light of backlight module
The opposite direction in direction.
The magnetic field generated by the second fixed part 315 generates magnetic force to the second moving portion 314, drives the second moving portion 314
Cushion 320 is squeezed along Z-direction.And then the second surface of lamp plate 111 is squeezed, so that lamp plate 111 generates deformation, adjustment distance is adjusted
The lamp plate 111 of 114 corresponding position of regulating device and the spacing H of astigmatism plate 210n。
The embodiment of the present application also provides a kind of display modules, and as shown in figure 11, Figure 11 is provided by the embodiment of the present application
Display module structural schematic diagram, which includes above-mentioned backlight module.Wherein, the specific structure of backlight module has been
It is described in detail in the above-described embodiments, details are not described herein again.
The embodiment of the present application also provides a kind of display devices, and as shown in figure 12, Figure 12 is provided by the embodiment of the present application
Display device structural schematic diagram, which includes above-mentioned display module.Certainly, display device shown in Figure 12 is only
To be schematically illustrate, which can be appoints such as mobile phone, tablet computer, laptop, electric paper book or television set
What electronic equipment having a display function.
Display module and display device as provided by the embodiment of the present application include above-mentioned backlight module, it uses
The display module and display device, backlight module include the astigmatism plate of the light emission side of luminescent screen and luminescent screen.Luminescent screen includes lamp
Plate and multiple light sources scatter by astigmatism plate after the light that light source issues reaches astigmatism plate, become equal white light.In light source institute
N number of range sensor is set on same surface, to detect the spacing H of lamp plate and astigmatism platen.The back side on surface where light source is set
M distance adjusting means are set, to adjust the spacing H of lamp plate and astigmatism platen.So that multiple light sources are equal with the spacing of astigmatism plate,
The corresponding light mixing distance of each light source is identical, and backlight module being capable of uniformly light-emitting.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (13)
1. a kind of backlight module characterized by comprising
Luminescent screen, and the astigmatism plate of the light emission side positioned at the luminescent screen；
The luminescent screen includes lamp plate and multiple light sources, and the multiple light source is located at the first surface of the lamp plate；Wherein, described
First surface is surface of the lamp plate close to the side of the astigmatism plate；
The first surface is provided with N number of range sensor, the range sensor is for detecting the lamp plate and described dissipating
Spacing H of the tabula rasa in different location1, H2... ..., Hn... ..., HN；Wherein, n, N are positive integer, and n≤N；
The second surface of the lamp plate is provided with M distance adjusting means, to adjust the lamp plate and the astigmatism plate
Spacing；Wherein, the second surface is the back side of the first surface, and M is positive integer；
Work as HnWith HmWhen unequal, then by the adjusting of the distance adjusting means to adjust Hn；Wherein, HmFor the lamp plate and institute
State the target spacing between astigmatism plate.
2. backlight module as described in claim 1, which is characterized in that
Target spacing H between the lamp plate and the astigmatism platemSize by formulaIt calculates and determines.
3. backlight module as described in claim 1, which is characterized in that
The distance adjusting means include pressure assembly and cushion, and the cushion is located at the pressure assembly and the lamp plate
Between.
4. backlight module as claimed in claim 3, which is characterized in that
The pressure assembly includes first movement portion, interconnecting piece and the first fixed part；
First fixed part is fixed on the second surface of the lamp plate, and in z-direction, and first fixed part is extremely
Small part covers the cushion；Wherein, the Z-direction is the opposite direction of the outgoing light direction of the backlight module；
The first movement portion is located at the side of first fixed part far from the cushion；
There is aperture, the interconnecting piece passes through the aperture, and the interconnecting piece is along the Z-direction on first fixed part
First end connects the first movement portion.
5. backlight module as claimed in claim 4, which is characterized in that
The aperture has internal screw thread；
The interconnecting piece has external screw thread；
The first movement portion drives the interconnecting piece to be rotated, so that the second end of the interconnecting piece is squeezed along the Z-direction
Press the cushion.
6. backlight module as claimed in claim 3, which is characterized in that
The pressure assembly includes the second moving portion and the second fixed part；
Second fixed part is fixed on the second surface of the lamp plate；
Second moving portion has magnetism；
Second fixed part can generate magnetic field, and second moving portion is driven to squeeze the cushion along Z-direction；
Wherein, the Z-direction is the opposite direction of the outgoing light direction of the backlight module.
7. backlight module as described in claim 1, which is characterized in that
The lamp plate and the astigmatism plate are bent to the emission side of the luminescent screen respectively.
8. backlight module as claimed in claim 7, which is characterized in that
The distributing position of the multiple light source forms the first array, and first array includes first direction and second direction；Its
In, the first direction is the bending direction of the lamp plate, and the second direction intersects with the first direction；
The distributing position of the M range sensor forms second array；The second array includes the first direction and institute
State second direction；
The M range sensor is located at the interval region of the multiple light source in said first direction.
9. backlight module as claimed in claim 8, which is characterized in that
The backlight module meets formula
Wherein, θ is the corresponding angle of the two neighboring light source in said first direction；
X is the number for the light source being spaced between the two neighboring range sensor in said first direction；
R is the corresponding curvature of the astigmatism plate.
10. backlight module as claimed in claim 9, which is characterized in that
The corresponding curvature r of the astigmatism plate meets 700R≤r≤1000R；
Along the first direction, the spacing between two adjacent light sources is D, wherein 0mm < D≤30mm；
Along the first direction, there are the X light sources between two adjacent range sensors, wherein 4≤X≤10.
11. backlight module as described in claim 1, which is characterized in that
The quantity N of the range sensor and the quantity M of the distance adjusting means are equal, and each range sensor with
The position of each distance adjusting means is corresponding.
12. a kind of display module, which is characterized in that including backlight module of any of claims 1-11.
13. a kind of display device, which is characterized in that including the display module described in claim 12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910569478.9A CN110187563B (en) | 2019-06-27 | 2019-06-27 | Backlight module, display module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910569478.9A CN110187563B (en) | 2019-06-27 | 2019-06-27 | Backlight module, display module and display device |
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| CN110187563A true CN110187563A (en) | 2019-08-30 |
| CN110187563B CN110187563B (en) | 2022-02-18 |
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| CN110187563B (en) | 2022-02-18 |
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