CN105508909A - Plane illumination light source adjustable in brightness of two sides - Google Patents
Plane illumination light source adjustable in brightness of two sides Download PDFInfo
- Publication number
- CN105508909A CN105508909A CN201410544923.3A CN201410544923A CN105508909A CN 105508909 A CN105508909 A CN 105508909A CN 201410544923 A CN201410544923 A CN 201410544923A CN 105508909 A CN105508909 A CN 105508909A
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- China
- Prior art keywords
- light
- film
- photoswitch
- light source
- illumination sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Liquid Crystal (AREA)
- Electroluminescent Light Sources (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a plane illumination light source adjustable in brightness of two sides. The plane illumination light source comprises an area light source; the area light source is provided with one or more photoswitch membranes and a control circuit used for controlling light transmittance of the one or more photoswitch membranes; the one or more photoswitch membranes cover at least one light-emitting surface of the area light source. According to the plane illumination light source disclosed by the invention, the one or more photoswitch membranes [such as PDLC (polymer dispersed liquid crystal) membranes] are combined with two light-emitting surfaces or one of the two light-emitting surfaces of the area light source, so that light output intensity of the front side and the back side of the area light source can be effectively adjusted; the light output intensity and a light distribution range can be adjusted as needed; the plane illumination light source has the advantage that light distribution can be adjusted.
Description
Technical field
The present invention relates to lighting technical field, be specifically related to the flat illumination sources that a kind of two-sided brightness is adjustable.
Background technology
Existing LED area light source, adopt surrounding LED light source frame to add light guide plate and realize, the brightness of light source positive and negative is unadjustable.But the light fixture such as desk lamp or pendent lamp, under different use occasion, often needs different Light distribation usually.Such as desk lamp, when reading use, wishes more Light distribation on the table.And do not read, as room lighting, wish that light has wider distribution.Therefore, it is desirable to do certain adjustment to the Light distribation of light fixture.Common light fixture adopts such as mechanic adjustment unit, carrys out light regulating exit direction by the direction of adjustment light fixture or lampshade.
Summary of the invention
For this reason, to be solved by this invention is existing LED illumination panel, does not have brightness and light transmittance regulatory function, the present invention is by controlling light transmittance, realize light transmittance and Light distribation regulatory function, for this reason, the invention provides the flat illumination sources that a kind of two-sided brightness is adjustable.
The technical scheme adopted is as described below:
The flat illumination sources that two-sided brightness is adjustable, comprises area source, and described area source is provided with photoswitch film and the control circuit for controlling described photoswitch film light transmittance, and described photoswitch film is covered at least one light-emitting area of described area source.
Described photoswitch film is liquid crystal film or electroluminescent fluid film.
Described area source comprises light guide plate and LED light source, and described LED light source is distributed at least one side of described light guide plate periphery, and forms incident light on this side.
Described LED light source is multiple, and it is distributed on the side of described light guide plate periphery.
Described area source is OLED luminescent panel, and described photoswitch film is distributed at least one light-emitting area of described OLED luminescent panel.
Described OLED luminescent panel divides and forms multiple luminous zone, each described luminous zone is provided with the corresponding drive circuit for driving luminescence.
The thickness of described photoswitch film is: 0.02mm-0.5mm.
Described photoswitch film is arranged on two light-emitting areas up and down of described area source, and photoswitch film set on each light-emitting area is provided with control circuit described in.
With the rectangular liquid crystal layer defining multiple pixel on described photoswitch film, the liquid crystal layer of each pixel is equipped with the described control circuit for controlling its light transmittance.
The present invention has following beneficial effect relative to prior art:
A. the present invention combines with photoswitch film at a light-emitting area of area source or upper and lower two light-emitting areas by adopting, can effectively adjusting range light source at double-edged light output intensity, light output intensity and distribution can be regulated as required, there is the adjustable advantage of Light distribation, meanwhile, transparent and opaque switching can be realized.
B. whole OLED luminescent panel is divided into multiple luminous zone by the present invention, the light on and off of each luminous zone can realize drive, OLED luminescent panel can be made local luminous according to indoor situations, or control the luminosity of some luminous zone, and then the adjustment realized illumination intensity or light distribution within doors, like this, screen just has the function of display simple information simultaneously.
C. the present invention is by by photoswitch film pixelation, can show the information such as word or figure, both attractive in appearance, can also realize the display of lighting source different colours according to the change of area source color simultaneously, makes light fixture have the function of display simple information.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the flat illumination sources structural representation (two-sided) of the first form provided by the present invention;
Fig. 2 is the planar light source schematic diagram (one side) of the second version provided by the present invention;
Fig. 3 is the planar light source schematic diagram (two-sided) of the third version provided by the present invention;
Fig. 4 is the planar light source schematic diagram of the 4th kind of version provided by the present invention;
Fig. 5 is the OLED light emitting panel structure schematic diagram after array provided by the present invention;
Fig. 6 is the PDLC liquid crystal film structural representation after array of the present invention;
Fig. 7 is dot matrix type PDLC liquid crystal film drive circuit switch control rule principle schematic;
Fig. 8 is dot matrix type electroluminescent fluid film drive circuit switch control rule principle schematic.
In figure: 1-light guide plate; 2-photoswitch film; 3-LED light source; 4-OLED luminescent panel; 5-luminous zone; 6-PDLC liquid crystal layer.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
The invention provides the flat illumination sources that a kind of two-sided brightness is adjustable, comprise area source, area source is provided with photoswitch film and the control circuit for controlling photoswitch film light transmittance, and photoswitch film is covered at least one light-emitting area of area source.
As shown in Figure 1 and Figure 2, area source wherein comprises light guide plate 1 and LED light source 3, and LED light source 3 is distributed at least one side of light guide plate 2 periphery, and forms incident light on this side; Wherein Figure 1 shows that LED light source 3 is distributed in a side of light guide plate 1, and Figure 2 shows that LED light source 3 is distributed in the dual-side position of light guide plate 1; Also can be distributed on the whole side of light guide plate 1 periphery.
Area source in Fig. 3 is transparent OLED luminescent panel 4, and photoswitch film 2 is distributed on two light-emitting areas up and down of OLED luminescent panel 4, photoswitch film set on each light-emitting area is respectively equipped with the control circuit of controller light transmittance.Can be controlled the luminous intensity on two sides and light transmittance respectively by the independent controling circuit controlling above and below; One of them light-emitting area of transparent OLED luminescent panel 4 shown in Fig. 4 is distributed with photoswitch film 2.In figs. 3 and 4, the light transmittance of photoswitch film can be controlled by the control circuit of photoswitch film, thus realize the change in illumination intensity.The control circuit that can control photoswitch film in figure 3 makes the photoswitch film of one of them light-emitting area open, the light that OLED luminescent panel sends is penetrated by this photoswitch film, control the control circuit of another light-emitting area, photoswitch film on this light-emitting area is closed, the light that OLED luminescent panel sends does not penetrate by this photoswitch film, so just realize that upper surface is luminous or lower surface is luminous, realize a light-emitting area illumination, as shown in Figure 4; Also the photoswitch film on two light-emitting areas can be made all to open, realize both sides light-emitting area and all can send light, as shown in Figure 3.
Preferably, OLED luminescent panel 4 divides and forms multiple luminous zone, each luminous zone is provided with the corresponding drive circuit for driving luminescence.
The thickness of photoswitch film 2 is wherein: 0.02mm-0.5mm.
Photoswitch film is wherein liquid crystal film or electroluminescent fluid film, and liquid crystal film wherein can adopt PDLC liquid crystal film.
As shown in Figure 5, the anode of the PDLC liquid crystal film attached on transparent OLED luminescent panel 4 surface and negative electrode procession are designed, form the drive circuit of multiple luminous zone 5, by controlling row-column electrode, the transmitance of correspondence position can be controlled respectively, and then reach and control the light on and off of luminous zone on transparent OLED luminescent panel and the object of intensity of brightness.Such as select X1, Y2 point applies voltage, then the light transmittance that X1Y2 is corresponding can change, light transmittance its exposure intensity different is also just different, by the design of multiple luminous zones drive circuit, the adjustment of luminous position and luminous intensity can be realized, realize different Light distribation.Therefore, this screen just has the function of display simple information simultaneously.
As shown in Figure 6, with the rectangular PDLC liquid crystal layer defined containing multiple pixel on PDLC liquid crystal film, each pixel of PDLC liquid crystal layer is equipped with the control circuit for controlling its light transmittance, when energized, the liquid crystal molecule of rete corresponding pixel points is regularly arranged, and this location point light can pass through smoothly.When not making alive, liquid crystal molecule is in lack of alignment state, and light, to herein, diffuse reflection occurs, and light transmission rate declines, and is rambling scattered light through light.By controlling the display that can realize the information such as figure, word and color through state of each lattice lcd, its schematic diagram as shown in Figure 7.
As shown in Figure 8, when photoswitch film 2 selects electroluminescent fluid film, with the multiple switch pixels point of rectangular formation on electroluminescent fluid film, each pixel is equipped with the drive circuit dripping form for controlling its intermediate liquid.When energized, drop is expanded, and causes this pixel light tight.When not making alive, drop shrinks due to tension force.This pixel transmittance rate improves.The dot matrix switch of this Film preparation is combined with light source, as above-mentioned similar, also can obtains the adjustable flat illumination sources of two-sided brightness.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among protection scope of the present invention.
Claims (9)
1. the flat illumination sources that a two-sided brightness is adjustable, comprise area source, it is characterized in that, described area source is provided with photoswitch film and the control circuit for controlling described photoswitch film light transmittance, and described photoswitch film is covered at least one light-emitting area of described area source.
2. flat illumination sources according to claim 1, is characterized in that, described photoswitch film is liquid crystal film or electroluminescent fluid film.
3. flat illumination sources according to claim 1, is characterized in that, described area source comprises light guide plate and LED light source, and described LED light source is distributed at least one side of described light guide plate periphery, and forms incident light on this side.
4. flat illumination sources according to claim 3, is characterized in that, described LED light source is multiple, and it is distributed on the side of described light guide plate periphery.
5. flat illumination sources according to claim 1, is characterized in that, described area source is OLED luminescent panel, and described photoswitch film is distributed at least one light-emitting area of described OLED luminescent panel.
6. flat illumination sources according to claim 5, is characterized in that, described OLED luminescent panel divides and forms multiple luminous zone, and each described luminous zone is provided with the corresponding drive circuit for driving luminescence.
7., according to the arbitrary described flat illumination sources of claim 1-6, it is characterized in that, the thickness of described photoswitch film is: 0.02mm-0.5mm.
8. flat illumination sources according to claim 7, is characterized in that, described photoswitch film is arranged on two light-emitting areas up and down of described area source, and photoswitch film set on each light-emitting area is provided with control circuit described in.
9. flat illumination sources according to claim 7, is characterized in that, with the rectangular liquid crystal layer defining multiple pixel on described photoswitch film, the liquid crystal layer of each pixel is equipped with the described control circuit for controlling its light transmittance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544923.3A CN105508909A (en) | 2014-10-15 | 2014-10-15 | Plane illumination light source adjustable in brightness of two sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544923.3A CN105508909A (en) | 2014-10-15 | 2014-10-15 | Plane illumination light source adjustable in brightness of two sides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105508909A true CN105508909A (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410544923.3A Pending CN105508909A (en) | 2014-10-15 | 2014-10-15 | Plane illumination light source adjustable in brightness of two sides |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196374A1 (en) * | 2017-04-24 | 2018-11-01 | 京东方科技集团股份有限公司 | Light source and illuminating device |
Citations (6)
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|---|---|---|---|---|
| CN1737669A (en) * | 2004-08-21 | 2006-02-22 | 三星电子株式会社 | Area source and contain the liquid crystal indicator of this light source |
| CN1854853A (en) * | 2005-04-26 | 2006-11-01 | 三星电子株式会社 | Display device |
| CN203019761U (en) * | 2012-10-23 | 2013-06-26 | 朱杨 | Electric control dichroic shading glass and hollow glass with same |
| CN103744220A (en) * | 2014-01-28 | 2014-04-23 | 张家港康得新光电材料有限公司 | PDLC (polymer dispersed liquid crystal) display module |
| CN103871387A (en) * | 2014-04-02 | 2014-06-18 | 北京航空航天大学 | Image sampling method based on liquid crystal display light modulation |
| CN104080219A (en) * | 2013-03-29 | 2014-10-01 | 海洋王照明科技股份有限公司 | Oled lamp |
-
2014
- 2014-10-15 CN CN201410544923.3A patent/CN105508909A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737669A (en) * | 2004-08-21 | 2006-02-22 | 三星电子株式会社 | Area source and contain the liquid crystal indicator of this light source |
| CN1854853A (en) * | 2005-04-26 | 2006-11-01 | 三星电子株式会社 | Display device |
| CN203019761U (en) * | 2012-10-23 | 2013-06-26 | 朱杨 | Electric control dichroic shading glass and hollow glass with same |
| CN104080219A (en) * | 2013-03-29 | 2014-10-01 | 海洋王照明科技股份有限公司 | Oled lamp |
| CN103744220A (en) * | 2014-01-28 | 2014-04-23 | 张家港康得新光电材料有限公司 | PDLC (polymer dispersed liquid crystal) display module |
| CN103871387A (en) * | 2014-04-02 | 2014-06-18 | 北京航空航天大学 | Image sampling method based on liquid crystal display light modulation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018196374A1 (en) * | 2017-04-24 | 2018-11-01 | 京东方科技集团股份有限公司 | Light source and illuminating device |
| US10785851B2 (en) | 2017-04-24 | 2020-09-22 | Boe Technology Group Co., Ltd. | Light source and lighting device |
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Application publication date: 20160420 |