CN208188529U - A kind of back light unit, backlight module and its display device - Google Patents
A kind of back light unit, backlight module and its display device Download PDFInfo
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- CN208188529U CN208188529U CN201820602626.3U CN201820602626U CN208188529U CN 208188529 U CN208188529 U CN 208188529U CN 201820602626 U CN201820602626 U CN 201820602626U CN 208188529 U CN208188529 U CN 208188529U
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- back light
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Abstract
The utility model relates to a kind of back light unit, backlight module and its display devices, the back light unit, including the backlight being arranged successively from top to bottom, pervasion component and fluorescence transferring film piece, the backlight includes substrate, LED component array on the substrate is set, the top of the pervasion component is arranged in the fluorescence transferring film piece, and at least one Wavelength conversion substance is mixed in the fluorescence transferring film piece, and the LED component array includes m × n device, wherein, m >=2, n >=2.The light that the light that the LED component is issued is issued through the pervasion component, white light is formed after carrying out light mixing with the light for exciting the Wavelength conversion substance to generate, by the way that LED component setting is arranged in array format, arranging density between device is larger, so that the light that the device on entire backlight is issued is mixed into area source in minimum distance, light mixing distance is shorter, which to be no longer needed to lens are arranged above device, can reach good light mixing effect.
Description
Technical field
The utility model relates to backlight source domain more particularly to a kind of backlights, backlight module and its display device.
Background technique
LED backlight refers to the backlight and traditional cold-cathode tube backlight of using light emitting diode as liquid crystal display
It compares, there are the clear superiorities such as low-power consumption, lower calorific value, high, the service life length of brightness.
LED backlight is divided into direct-light type LED backlight and two kinds of side light type LED back light at present.Direct-light type LED backlight and side-light type
The difference of LED backlight is that the cloth of LED grain builds mode, and direct-light-type backlight is located at the back of display panel, side entrance back
Source is located at the side of display panel, and direct-type backlight has brightness and contrast's height, uniformity relative to side-edge type backlight
The good, advantages such as colour gamut is broad, long service life, and light-emitting angle is big.
But the limitation that direct-light-type backlight is limited to light mixing distance causes entire backlight thicker, as depicted in figs. 1 and 2,
Traditional direct LED backlight uses several backlight items 10, needs to apply in the upper surface of device plus lens
In backlight screen.It being influenced by lens light mixing distance, the thickness of backlight screen will will increase (thickness at least needing 20~35mm),
It is disagreed with the pursuit at present to backlight screen ultrathin.
Summary of the invention
The purpose of the utility model is to provide a kind of back light unit, backlight module and its display devices, can be to LED
Finer control is realized in region, enhances the property of display high dynamic range images (High-Dynamic Range, abbreviation HDR)
Can, light mixing is carried out without using lens, light mixing distance can be shortened, reliability is improved, reduces cost.
In order to solve the above technical problems, the technical solution of the utility model is:
The backlight being arranged successively from top to bottom, pervasion component and fluorescence transferring film piece, the backlight include substrate, if
Set LED component array on the substrate, which is characterized in that the upper of the pervasion component is arranged in the fluorescence transferring film piece
It is square, at least one Wavelength conversion substance is mixed in the fluorescence transferring film piece, the LED component array includes m × n LED device
Part, wherein m >=2, n >=2.
Preferably, the light that the light that the LED component is issued is issued through the pervasion component, with the excitation wavelength convert
The light that substance generates forms white light after carrying out light mixing.
Preferably, the LED component includes a blue-light LED chip, mixes that there are two types of wavelength in the fluorescence transferring film piece
Transformational substance, respectively red fluorescence powder and green emitting phosphor.
Preferably, the spacing in the length or width direction of the two neighboring LED device is 0.5mm~10mm.
Preferably, the pervasion component is diffuser plate, and the spacing of the diffuser plate and the substrate is 1 mm~10mm.
Preferably, for the LED component using sheet-shaped LED device, the sheet-shaped LED device includes wiring board, setting
The packaging plastic of at least one LED chip and the covering LED chip on the wiring board.
Preferably, for the LED component using CSP LED component, the CSP LED component includes at least one LED
The packaging plastic of chip and the covering LED chip；The area ratio of the area of the LED chip and the CSP LED component
Greater than 1:1.14.
Preferably, the length or width size of the LED device is the mm of 0.5mm~1, the two neighboring LED
The spacing in the length or width direction of device is 1mm~5mm, and the spacing of the pervasion component and the substrate is 1 mm~5mm.
Preferably, further include the luminous driving circuit of each LED component of driving, the driving circuit using region or
Independent form control LED component.
Preferably, the region includes a string b and the LED component, a string b and LED component structure in the region
At a closed circuit, wherein a >=2, b >=2；The backlight is divided at least one described region.
It preferably, also include optical component, the optical component includes at least one diffusion sheet and/or at least one prism
Piece.
A kind of backlight module is spliced by back light unit described at least one.
A kind of display device, including the backlight module.
A kind of back light unit, backlight module and its display device, have the following beneficial effects:
1, a kind of back light unit, backlight module and its display device provided by the utility model, including from top to bottom successively
The backlight of arrangement, pervasion component and fluorescence transferring film piece, the backlight include that m row × n column are disposed on the substrate
LED component array, the light that the light that the LED component is issued is issued through the pervasion component, with the excitation wavelength convert object
The light that matter generates forms white light after carrying out light mixing, since LED component is arranged in array format, area source directly can be achieved, be not necessarily to
On the led device side setting lens can be directly realized by short distance light mixing, it can be achieved that display ultrathin；
2, a kind of back light unit, backlight module and its display device provided by the utility model, back light unit includes can be real
The driving circuit of existing region control or independent control can realize finer control to LED component, improve the comparison of display picture
Degree, reaches higher HDR effect.
Detailed description of the invention
Figure l is the utility model traditional backlight source main view in the prior art；
Fig. 2 is the utility model traditional backlight source top view in the prior art；
Fig. 3 is the main view of one of the utility model embodiment one back light unit；
Fig. 4 is the top view of one of the utility model embodiment one back light unit；
Fig. 5 is the main view of one of the utility model embodiment one sheet-shaped LED device；
Fig. 6 is the main view of one of the utility model embodiment one CSP LED component；
Fig. 7 is the schematic diagram of one of the utility model embodiment one back light unit region control；
Fig. 8 is the main view of one of the utility model embodiment two back light unit.
Specific embodiment
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term " including " and/or " packet
Include " when, indicate existing characteristics, operation, device, component and/or their combination." top ' " lower section " includes that contact is arranged
Or the case where non-contact setting.
For technology contents, the construction feature, the objects and the effects that the utility model is described in detail, below in conjunction with implementation
Mode simultaneously cooperates attached drawing to be explained in detail.
Embodiment one
As shown in Figure 3, Figure 4, a kind of back light unit, comprising: the backlight 1 being arranged successively from top to bottom, 2 He of pervasion component
Fluorescence transferring film piece 3, the backlight include substrate 11, and LED component array 12 on the substrate is arranged, and the fluorescence turns
The top that the pervasion component 2 is arranged in diaphragm 3 is changed, is mixed at least one Wavelength conversion substance in the fluorescence transferring film piece 3,
The LED component array includes m × n device, wherein m >=2, n >=2.
Then the light that the light that the LED component 12 is issued is issued through the pervasion component is converted with the fluorescence is excited
The light that the Wavelength conversion substance being mixed in diaphragm generates carries out light mixing and forms white light.
In this implementation, the pervasion component 2 is diffuser plate, and the diffuser plate 2 can be further such that the LED component battle array
The light that column 12 issue is more uniform, and the spacing range of the diffuser plate 2 and the substrate 11 is 1mm~10mm, the diffuser plate 2
Sufficient light mixing is not can be carried out with the too small light that will lead to the sending of LED component 12 of spacing of the substrate 11, through diffuser plate meeting
See relatively clear light and shade subregion；If it is available that the spacing of the diffuser plate 2 and the substrate 11 will lead to greatly very much backlight
Brightness is less and increases the thickness of back light unit too, is unable to satisfy the requirement for pursuing ultra-thin display screen.
Substrate 11 described in the present embodiment can be FR-4 substrate, aluminum substrate etc..
In LED component array, the spacing in the length or width direction of the two neighboring LED device be 0.5mm~
10mm。
In the present embodiment, since the backlight 1 is by being arranged on the substrate 11 and in the LED of array format arrangement
Device forms, and the arranging density between device is larger, so that the light that the device on entire backlight is issued is in minimum distance
It is mixed into area source, light mixing distance is shorter, which to be no longer needed to lens are arranged above device, can reach good light mixing effect.
The packing forms of the LED component 12 include a variety of encapsulation shapes such as chip package, CSP encapsulation, the encapsulation of TOP device
Formula can specifically use according to actual needs.
One of the present embodiment embodiment, as shown in figure 5, the LED component 12 is using sheet-shaped LED device,
The sheet-shaped LED device 12 includes wiring board 121, at least one LED chip on the wiring board 121 and covering is arranged in
The packaging plastic 123 of the LED chip.The wiring board 121 can be BT plate or All other routes plate etc., and the present embodiment is preferably BT
Plate.
Another embodiment in the present embodiment, the LED component is using CSP LED component, the CSP
LED component can be belt substrate, be also possible to exempt from substrate, as shown in fig. 6, the CSP LED component is to exempt from the envelope of substrate
Dress form, the CSP LED component 12 include the packaging plastic 123 of at least one LED chip 122 and the covering LED chip.
The area ratio of the area of the LED chip and the CSP LED component is greater than 1:1.14.
In the present embodiment, the length or width size of the preferably described LED device is the mm of 0.5mm~1, two neighboring
The spacing in the length or width direction of the LED device is 1mm~5mm, and the spacing of the pervasion component and the substrate is 1
Mm~5mm.
The LED chip 122 can be random color using upside-down mounting or the packaged type of formal dress, the LED chip
One or two kinds of or two or more colors LED chip.
The matrix of the fluorescence transferring film piece 3 can be packaging plastic, the matrix of fluorescence transferring film piece described in the present embodiment 3
For packaging plastic, it is mixed at least one Wavelength conversion substance in the fluorescence transferring film piece, the Wavelength conversion substance can basis
Actual demand adjusts the assembled scheme of fluorescent powder or fluorescent powder polymer beads, and it is glimmering that the Wavelength conversion substance can be nitride
A kind of or at least one combination of light powder, YAG powder, silicate fluorescent powder, red fluorination matter fluorescent powder or quanta point material
Deng being not limited to present embodiment.
In the present embodiment, the preferably described LED component 12 includes blue-light LED chip, a nitrifier green phosphor
Matter fluorescent powder is fluorinated with red.The NTSC value of backlight screen can be improved in such arranging scheme, realizes high colour gamut display effect.
The back light unit can also include the driving circuit for driving each LED component luminous, the driving circuit
Using region or independent form control LED component.In the present embodiment, it is preferred to use the luminous circuit design in region, institute
Stating region includes a string b and the LED component, wherein a >=2, b >=2, a string b and LED component in the region are constituted
One closed circuit, the backlight are divided at least one described region, by adjusting electric power outputting current, to reach control
Make the light emission luminance of each junior unit.LED component independent control in different zones.In the present embodiment, as shown in fig. 7, described
Backlight 1 is from left to right divided into three zone of control, individually controls the backlight area of left, center, right three, there are three solely altogether
The closed circuit of vertical control, for example black is shown according to the picture for needing to make the leftmost side of display picture, the leftmost side can be closed
Circuit working principle: realize that the effect of black is not off circuit and makes relative to a traditional closed circuit
LED component does not work, but by adjusting optical filter, actually there are also bias lights, and there is no completely black, the sheets realized truly
The light that display background is eliminated by the way of the control of region in embodiment realizes real black, can realize more to LED component
Fine control improves the contrast of display picture, reaches higher HDR effect.
Embodiment two
A kind of back light unit provided in this embodiment and the structure of backlight unit in embodiment one are essentially identical, different
It is, as shown in figure 8, back light unit described in the present embodiment also includes optical component 4.
The optical component 4 includes at least one diffusion sheet and/or at least one prismatic lens, optics described in the present embodiment
Component is comprising being successively lower diffusion sheet, lower prismatic lens, upper prismatic lens, upper diffusion sheet from top to bottom.The pervasion component 2 can be into
The light that one step issues LED component is more uniform, and light-out effect can be enhanced in the prismatic lens.
The top of the pervasion component 2 is arranged in the fluorescence transferring film piece 3, can be set in 2 He of pervasion component
Between the optical component 4, also it can be set in the upper surface of the diffusion sheet of the optical component 4 or prismatic lens.
Embodiment three
In this implementation, a kind of backlight module is that at least one back light unit as described in embodiment one is spliced.
A kind of display device, includes backlight module, and the backlight module is that at least one is carried on the back as described in embodiment one
Light unit is spliced.
A kind of back light unit, backlight module and its display device, have the following beneficial effects:
1, a kind of back light unit, backlight module and its display device provided by the utility model, including from top to bottom successively
The backlight of arrangement, pervasion component and fluorescence transferring film piece, the backlight include that m row × n column are disposed on the substrate
LED component array, the light that the light that the LED component is issued is issued through the pervasion component, with the excitation wavelength convert object
The light that matter generates forms white light after carrying out light mixing, since LED component is arranged in array format, area source directly can be achieved, be not necessarily to
On the led device side setting lens can be directly realized by short distance light mixing, it can be achieved that display ultrathin；
2, a kind of back light unit, backlight module and its display device provided by the utility model, back light unit includes can be real
The driving circuit of existing region control or independent control can realize finer control to LED component, improve the comparison of display picture
Degree, reaches higher HDR effect.
Claims (13)
1. a kind of back light unit, comprising: the backlight being arranged successively from top to bottom, pervasion component and fluorescence transferring film piece, it is described
Backlight includes substrate, and LED component array on the substrate is arranged, which is characterized in that the fluorescence transferring film piece setting
At least one Wavelength conversion substance, the LED component battle array are mixed in the top of the pervasion component, the fluorescence transferring film piece
Column include m × n LED component, wherein m >=2, n >=2.
2. the back light unit according to claim 1, which is characterized in that the light that the LED component is issued is through the diffusion
The light that component issues forms white light after carrying out light mixing with the light for exciting the Wavelength conversion substance to generate.
3. the back light unit according to claim 2, which is characterized in that the LED component includes a blue-light LED chip,
Wavelength conversion substance, respectively red fluorescence powder and green emitting phosphor there are two types of being mixed in the fluorescence transferring film piece.
4. the back light unit according to claim 1, which is characterized in that the length or width of the two neighboring LED device
The spacing for spending direction is 0.5mm~10mm.
5. back light unit according to claim 1, which is characterized in that the pervasion component is diffuser plate, the diffuser plate
Spacing with the substrate is 1 mm~10mm.
6. back light unit according to claim 1, which is characterized in that the LED component using sheet-shaped LED device,
The sheet-shaped LED device includes wiring board, at least one LED chip on the wiring board and the covering LED is arranged in
The packaging plastic of chip.
7. back light unit according to claim 1, which is characterized in that the LED component using CSP LED component,
The CSP LED component includes the packaging plastic of at least one LED chip and the covering LED chip；The face of the LED chip
The long-pending area ratio with the CSP LED component is greater than 1:1.14.
8. back light unit according to claim 1, which is characterized in that the length or width size of the LED device
For the mm of 0.5mm~1, the spacing in the length or width direction of the two neighboring LED device is 1mm~5mm, the diffusion structure
The spacing of part and the substrate is 1 mm~5mm.
9. the back light unit according to claim 1, which is characterized in that further include that each LED component of driving shines
Driving circuit, the driving circuit use region or independent form control LED component.
10. the back light unit according to claim 9, which is characterized in that the region includes a string b and the LED device
Part, a string b and LED component in the region constitute a closed circuit, wherein a >=2, b >=2；The backlight is drawn
It is divided at least one described region.
11. the back light unit according to claim 1, which is characterized in that also include optical component, the optical component packet
Containing at least one diffusion sheet and/or at least one prismatic lens.
12. a kind of backlight module, which is characterized in that including at least one backlight as described in any one of claims 1 to 11
Unit spliced forms.
13. a kind of display device, which is characterized in that including backlight module as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820602626.3U CN208188529U (en) | 2018-04-26 | 2018-04-26 | A kind of back light unit, backlight module and its display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820602626.3U CN208188529U (en) | 2018-04-26 | 2018-04-26 | A kind of back light unit, backlight module and its display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633792A (en) * | 2018-12-18 | 2019-04-16 | 广东晶科电子股份有限公司 | A kind of composite membrane reducing blue light harm, preparation process and backlight module |
| CN110136597A (en) * | 2019-05-23 | 2019-08-16 | 安徽芯瑞达科技股份有限公司 | A kind of ultra-thin matrix backlight mould group and preparation method thereof |
| CN114973984A (en) * | 2022-05-31 | 2022-08-30 | Tcl华星光电技术有限公司 | Display screen and splicing display device |
-
2018
- 2018-04-26 CN CN201820602626.3U patent/CN208188529U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633792A (en) * | 2018-12-18 | 2019-04-16 | 广东晶科电子股份有限公司 | A kind of composite membrane reducing blue light harm, preparation process and backlight module |
| CN109633792B (en) * | 2018-12-18 | 2024-03-19 | 广东晶科电子股份有限公司 | Composite film capable of reducing blue light hazard, preparation process and backlight module |
| CN110136597A (en) * | 2019-05-23 | 2019-08-16 | 安徽芯瑞达科技股份有限公司 | A kind of ultra-thin matrix backlight mould group and preparation method thereof |
| CN114973984A (en) * | 2022-05-31 | 2022-08-30 | Tcl华星光电技术有限公司 | Display screen and splicing display device |
| CN114973984B (en) * | 2022-05-31 | 2023-10-31 | Tcl华星光电技术有限公司 | Display screen and spliced display device |
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