CN105739178A - Backlight module, manufacturing method thereof, and display device - Google Patents
Backlight module, manufacturing method thereof, and display device Download PDFInfo
- Publication number
- CN105739178A CN105739178A CN201610188389.6A CN201610188389A CN105739178A CN 105739178 A CN105739178 A CN 105739178A CN 201610188389 A CN201610188389 A CN 201610188389A CN 105739178 A CN105739178 A CN 105739178A
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- Prior art keywords
- bandpass filter
- guide plate
- backlight module
- light source
- light guide
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
-
- 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
- G02F1/133621—Illuminating devices providing coloured light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module and a manufacturing method thereof, and relates to the field of display. The problem that different customers have different requirements for chromaticity coordinates can be solved. Rapid development can be achieved, the product development cycle can be shortened, and product cost can be reduced. The backlight module comprises a light source and a light guide plate and further comprises at least one bandpass filter which is arranged between the light outlet face of the light source and the light inlet face of the light guide plate and used for adjusting the wavelength of the emitted light, entering the light guide plate, of the light source.
Description
Technical field
The present invention relates to display field, particularly relate to a kind of backlight module and preparation method thereof, display device.
Background technology
Display product is in order to meet the hobby of different geographical all ages and classes at present, develops to personalized, customization direction.Chromaticity coordinates aspect is exactly one of them aspect, and display chromaticity coordinates is had different preferences by the people of different geographical, and what have likes display partially blue, has and likes display partially yellow.
The chromaticity coordinates of current liquid crystal display product, mainly determined by color film two aspect of the light source of backlight module and display floater, the light source of backlight module is mainly LED (LightEmittingDiode, light emitting diode), limitation and particularity due to LED production technology, the chromaticity coordinates of LED is usually what and then brightness was together changed, and becomes the trend of oblique line, it is difficult to regulate.And in order to meet volume production, the scope of the chromaticity coordinates that LED is corresponding is generally 6～8, if designing less chromaticity coordinates scope, although chromaticity coordinates can be easy to and regulate, but when can realize, raw material requirement is high, cause cost increase.And coloured silk film aspect, by regulating the material of three sub-pixs of red, green, blue, although the adjustment of chromaticity coordinates can be carried out, but the construction cycle is long, cause that whole product development cycle extends, be not particularly suited for the display product of short life cycle.
Summary of the invention
The present invention provides a kind of backlight module and preparation method thereof, display device, solves different client's opponent-color coordinates and requires different problems, and can carry out fast Development, shortens product development cycle, reduce product cost.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
A kind of backlight module, including light source and light guide plate, also includes: at least one bandpass filter, and what be arranged at the exiting surface of described light source and described light guide plate enters between bright finish, enters the wavelength of described light guide plate for adjusting described light source injection light.
Alternatively, the exiting surface of described light source and described light guide plate enter to be provided with between bright finish at least two bandpass filter, the described mutual stacking of at least two bandpass filter, or, described at least two bandpass filter corresponds respectively to the zones of different on described light source exiting surface.
Preferably, described bandpass filter is multispectral linear variable filter.
Alternatively, what described bandpass filter was attached to described light guide plate enters bright finish.
Alternatively, described light source is positioned at the side of described light guide plate.
The present invention also provides for a kind of display device, including: the backlight module described in any of the above-described item.
The present invention also provides for the manufacture method of a kind of backlight module, including: the chromaticity coordinates needed according to design, select at least one bandpass filter；Assemble backlight module, and described bandpass filter is arranged on the exiting surface of light source and entering between bright finish of light guide plate.
Alternatively, exiting surface and when entering to arrange between bright finish at least two bandpass filter of described light guide plate at described light source, the position of described at least two bandpass filter is irrelevant is: stacking, or, described at least two bandpass filter corresponds respectively to the zones of different on described light source exiting surface.
Alternatively, described bandpass filter is multispectral linear variable filter, and including multiple light transmission passages, described light source includes multiple arbitrary source；At least one bandpass filter of described selection, also includes: chromaticity coordinates as required, designs the light transmission passage of described multispectral linear variable filter and the corresponding relation of described arbitrary source；Described bandpass filter is arranged on exiting surface and when the entering between bright finish of light guide plate of light source, installs according to the described corresponding relation of design.
Alternatively, described assembling backlight module, and described bandpass filter is arranged on the exiting surface of light source and light guide plate enter between bright finish, including: what described bandpass filter was attached to described light guide plate enters bright finish；Each assembly of backlight module is assembled by existing method.
Backlight module that the embodiment of the present invention provides and preparation method thereof, entering to arrange between bright finish at least one bandpass filter at the exiting surface of light source (such as LED) and light guide plate, described bandpass filter enters the wavelength of light guide plate for adjusting light source injection light.Different bandpass filters is used by selection, control to enter the wavelength of light guide plate from source ends injection, with this effect reaching to control and regulate backlight product colour temperature and chromaticity coordinates, solve different client's opponent-color coordinates and require different problems, and this programme only can be realized by the different bandpass filter of replacing, therefore, it is possible to quickly tackle, reach to shorten product development cycle, improve the public property of product, reduce the effect of product cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The profile of the backlight module that Fig. 1 provides for the embodiment of the present invention；
The front view of the backlight module that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 is the injection spectrum of existing backlight module；
The injection spectrum of the backlight module that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 is the schematic diagram of bandpass filter stacking in the embodiment of the present invention；
Fig. 6 is the schematic diagram of bandpass filter splicing in the embodiment of the present invention；
Fig. 7 is the schematic diagram of a kind of multispectral linear variable filter；
Fig. 8 is the relative position schematic diagram of the light transmission passage of multispectral linear variable filter and arbitrary source in the embodiment of the present invention.
Accompanying drawing labelling
10-light source, 11-light guide plate, 12-bandpass filter, 121-the first bandpass filter,
122-the second bandpass filter, 100-arbitrary source.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment
The embodiment of the present invention provides a kind of backlight module, as depicted in figs. 1 and 2, this backlight module includes: light source 10 and light guide plate 11, also include: at least one bandpass filter 12, what be arranged at the exiting surface of light source 10 and light guide plate 11 enters between bright finish, penetrates light enter the wavelength of light guide plate 11 for adjusting light source 10.Different bandpass filters 12 is used by selection, control to penetrate light from source ends and enter the wavelength of light guide plate, with this effect reaching to control and regulate backlight product colour temperature and chromaticity coordinates, solve different client's opponent-color coordinates and require different problems, and this programme only can be realized by the different bandpass filter of replacing, therefore, it is possible to quickly tackle, reach to shorten product development cycle, improve the public property of product, reduce the effect of product cost.
The people of zones of different is different to the requirement of colour temperature, Huang about 6500K partially is liked in some region, indigo plant about 8300K partially is liked in some region, different chromaticity coordinates requirements can be produced for different colour temperatures, different bandpass filters 12 can be selected according to different crowds, such as: have the partially yellow chromaticity coordinates required most 0.31～0.329, thus need to select partially yellow optical filter；As required, chromaticity coordinates is 0.3～0.31, then need to select partially blue optical filter.By completing selection partially blue, partially yellow, then in the filter plate chosen finer selection chromaticity coordinates, with this undulatory property reducing product chromaticity coordinates, design the bandpass filter 12 meeting product requirement.
Fig. 3 is the chromatogram of a kind of existing backlight module, the exiting surface of its light source and light guide plate enter not set between bright finish bandpass filter.The chromatogram of the backlight module that Fig. 4 provides for the present embodiment, the difference part of backlight module corresponding to Fig. 3 is only that, enters to be provided with between bright finish pass filter 12 at the exiting surface of light source 10 and light guide plate 11 in this backlight module.Waveform A shown in Fig. 3 is mainly made up of blue light and gold-tinted two parts, and after can be seen that increase bandpass filter 12 in Fig. 4, the new waveform B recorded is relatively waveform left shift shown in Fig. 3 in the position of blue light, therefore chromaticity coordinates relatively Fig. 3 that new waveform is formed is partially blue；If new waveform offsets to the right at the more original waveform in the position of blue light, then the chromaticity coordinates formed can be partially yellow.
It should be noted that, selection which kind of bandpass filter 12 and the number of bandpass filter 12, mounting means etc. are not all limited by the present embodiment, as long as the light of source ends injection is after the bandpass filter 12 adjustment to wavelength, enter light guide plate, finally record backlight module chromaticity coordinates and meet design needs.Additionally, backlight module also includes optical film sheet, glue frame etc., because unrelated to the invention, no longer describe in detail herein.
The exiting surface of light source 10 and when entering to arrange between bright finish at least two bandpass filter 12 of light guide plate 11, alternatively, as shown in Figure 5, these bandpass filters (such as the first bandpass filter 121, second bandpass filter 122) can stacking mutually, the emergent light of light source 10 successively enters light guide plate 11 through each bandpass filter 12 of stacking；Can also as shown in Figure 6, these bandpass filters (121,122) splice, and different band pass filter (121,122) corresponds respectively to the zones of different on light source 10 exiting surface.Certainly, during bandpass filter 12 more than two, it is also possible to adopt above two set-up mode, for there being layered relationship between existing bandpass filter simultaneously, for splicing relation between some bandpass filters.
Preferably, the bandpass filter 12 described in the present embodiment is multispectral linear variable filter.
With reference to shown in Fig. 7, multispectral linear variable filter (hereinafter referred to as linear variable filter) is its each different locus narrow band pass filter corresponding to different light transmission passage spectral coverages, in other words, linear variable filter is a kind of special optical filter, difference that its centre wavelength is as on optical filter position and change.The linear variable filter adopting ion beam assisted deposition development has light transmission passage at 0.4～1.1um wave band, and average transmittance is from 77.5% to 97.4%, and the middle any position at substrate only passes through the light of a kind of specific wavelength in 0.4～1.1um.Current linear variable filter has been successfully applied to miniature spectrometer.
Light source 10 (generally presenting with light strips) generally comprises multiple arbitrary source 100, and between arbitrary source 100, blank does not set light source, for instance for LED light source, and row (or some rows) LED is an arbitrary source 100.Multispectral linear variable filter includes multiple light transmission passage, when adopting multispectral linear variable filter to change backlight module chromaticity coordinates, first pass through simulation experiment or other method, chromaticity coordinates as required designs the light transmission passage of multispectral linear variable filter and the corresponding relation of arbitrary source 100, i.e. the relative position relation of each arbitrary source 100 of each light transmission passage of multispectral linear variable filter and light source；Then, when assembling backlight module, install according to the above-mentioned corresponding relation of design, multispectral linear variable filter is arranged on the exiting surface of light source 10 and entering between bright finish of light guide plate.The position of linear tape pass filter 12 and LED is correspondingly arranged.Shown in Fig. 8, for instance, want display partially blue, then by the light transmission passage (blue channel) of blue wave band corresponding for multispectral linear variable filter and LED just to.
In above-mentioned narration, although for sidelight type backlight module, but actually it is also applied for other type of backlight module, such as the backlight module of full run-down type, hollow type.In sidelight type backlight module, light source 10 is positioned at the side of light guide plate 11；In Staight downward type backlight module, light source 10 is positioned at the underface of light guide plate 11；In hollow type backlight module, use hot cathode tube as light source 10, the medium that this structure is transmitted using air as light source, light source is adjusted and after reflection by prismatic lens and reflecting plate travel direction downwards, a part is upward through light guide plate outgoing in surface, and another part enters cavity because of total reflection once again until through light guide plate outgoing after catadioptric effect, and light source upwards or be directly entered light guide plate outgoing, or through the outgoing again of a succession of refraction, reflection, light guide plate be shaped as taper structure.
The backlight module that the embodiment of the present invention provides, different bandpass filters is used by selection, control to enter the wavelength of light guide plate from source ends injection, with this effect reaching to control and regulate backlight product colour temperature and chromaticity coordinates, solve different client's opponent-color coordinates and require different problems, and can quickly tackle, reach to shorten product development cycle, improve the public property of product, reduce the effect of product cost.
The embodiment of the present invention also provides for a kind of display device, and it includes any one backlight module above-mentioned.The chromaticity coordinates of described display device is easily adjusted, and the construction cycle is short, and product cost is low.Described display device can be: any product with display function or the parts such as liquid crystal panel, Electronic Paper, oled panel, mobile phone, panel computer, television set, display, notebook computer, DPF, navigator.
Accordingly, the embodiment of the present invention also provides for the manufacture method of a kind of backlight module, including:
Step one, the chromaticity coordinates (being determined by customer demand) needed according to design, select at least one bandpass filter 12, can be obtained bandpass filter 12 or the bandpass filter group of needs when being embodied as by simulation experiment；
Step 2, assembling backlight module, and bandpass filter 12 is arranged on the exiting surface of light source 10 and entering between bright finish of light guide plate.It is embodied as Shi Kexian and bandpass filter 12 is attached to the bright finish that enters of light guide plate 11, then assemble each assembly of backlight module by existing method.
If bandpass filter 12 more than one (be more than or equal to two), then the position of any two bandpass filter 12 is irrelevant is: stacking, or splicing, and splicing i.e. two bandpass filters 12 correspond respectively to the zones of different on light source 10 exiting surface.
If bandpass filter 12 selects multispectral linear variable filter, multispectral linear variable filter to include multiple light transmission passage, light source 10 includes multiple arbitrary source；Step one selects also include during bandpass filter 12: chromaticity coordinates as required, design the light transmission passage of multispectral linear variable filter and the corresponding relation of arbitrary source；Multispectral linear variable filter is arranged on exiting surface and when the entering between bright finish of light guide plate of light source 10, installs according to the corresponding relation of design.
The manufacturing backlight module method that the embodiment of the present invention provides, different bandpass filters is used by selection, control to enter the wavelength of light guide plate from source ends injection, with this effect reaching to control and regulate backlight product colour temperature and chromaticity coordinates, solve different client's opponent-color coordinates and require different problems, and can quickly tackle, reach to shorten product development cycle, improve the public property of product, reduce the effect of product cost.
In embodiments of the present invention; the sequence number of described each step can not be used for limiting the sequencing of each step; for those of ordinary skill in the art, under the premise not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (10)
1. a backlight module, including: light source and light guide plate, it is characterised in that also include:
At least one bandpass filter, what be arranged at the exiting surface of described light source and described light guide plate enters between bright finish, enters the wavelength of described light guide plate for adjusting described light source injection light.
2. backlight module according to claim 1, it is characterised in that the exiting surface of described light source and described light guide plate enter to be provided with between bright finish at least two bandpass filter, the described mutual stacking of at least two bandpass filter, or,
Described at least two bandpass filter corresponds respectively to the zones of different on described light source exiting surface.
3. backlight module according to claim 1, it is characterised in that described bandpass filter is multispectral linear variable filter.
4. backlight module according to claim 1, it is characterised in that what described bandpass filter was attached to described light guide plate enters bright finish.
5. backlight module according to claim 1, it is characterised in that described light source is positioned at the side of described light guide plate.
6. a display device, it is characterised in that including: the backlight module described in any one of claim 1-5.
7. the manufacture method of a backlight module, it is characterised in that including:
According to the chromaticity coordinates that design needs, select at least one bandpass filter；
Assemble backlight module, and described bandpass filter is arranged on the exiting surface of light source and entering between bright finish of light guide plate.
8. manufacture method according to claim 7, it is characterised in that in exiting surface and when the entering to arrange between bright finish at least two bandpass filter of described light guide plate of described light source, the position of described at least two bandpass filter is irrelevant is: stacking, or,
Described at least two bandpass filter corresponds respectively to the zones of different on described light source exiting surface.
9. manufacture method according to claim 7, it is characterised in that described bandpass filter is multispectral linear variable filter, including multiple light transmission passages, described light source includes multiple arbitrary source；At least one bandpass filter of described selection, also includes:
Chromaticity coordinates as required, designs the light transmission passage of described multispectral linear variable filter and the corresponding relation of described arbitrary source；
Described bandpass filter is arranged on exiting surface and when the entering between bright finish of light guide plate of light source, installs according to the described corresponding relation of design.
10. manufacture method according to claim 7, it is characterised in that described assembling backlight module, and described bandpass filter is arranged on the exiting surface of light source and light guide plate enter between bright finish, including:
What described bandpass filter was attached to described light guide plate enters bright finish；Each assembly of backlight module is assembled by existing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188389.6A CN105739178A (en) | 2016-03-29 | 2016-03-29 | Backlight module, manufacturing method thereof, and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188389.6A CN105739178A (en) | 2016-03-29 | 2016-03-29 | Backlight module, manufacturing method thereof, and display device |
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| CN105739178A true CN105739178A (en) | 2016-07-06 |
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| CN201610188389.6A Pending CN105739178A (en) | 2016-03-29 | 2016-03-29 | Backlight module, manufacturing method thereof, and display device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621907A (en) * | 2003-11-29 | 2005-06-01 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN101261401A (en) * | 2008-04-21 | 2008-09-10 | 友达光电股份有限公司 | LCD device |
| CN103791274A (en) * | 2013-10-30 | 2014-05-14 | 友达光电股份有限公司 | Planar light source generating device |
| CN204044418U (en) * | 2013-12-20 | 2014-12-24 | 石乃琦 | Light control device with replaceable optical filter |
| CN104515041A (en) * | 2014-12-15 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module structure |
-
2016
- 2016-03-29 CN CN201610188389.6A patent/CN105739178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621907A (en) * | 2003-11-29 | 2005-06-01 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN101261401A (en) * | 2008-04-21 | 2008-09-10 | 友达光电股份有限公司 | LCD device |
| CN103791274A (en) * | 2013-10-30 | 2014-05-14 | 友达光电股份有限公司 | Planar light source generating device |
| CN204044418U (en) * | 2013-12-20 | 2014-12-24 | 石乃琦 | Light control device with replaceable optical filter |
| CN104515041A (en) * | 2014-12-15 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module structure |
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Application publication date: 20160706 |