WO2006029595A1 - Light-emitting diode system for creating uniform planar light - Google Patents
Light-emitting diode system for creating uniform planar light Download PDFInfo
- Publication number
- WO2006029595A1 WO2006029595A1 PCT/DE2005/001560 DE2005001560W WO2006029595A1 WO 2006029595 A1 WO2006029595 A1 WO 2006029595A1 DE 2005001560 W DE2005001560 W DE 2005001560W WO 2006029595 A1 WO2006029595 A1 WO 2006029595A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- emitting diode
- frame
- diode system
- leds
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
Definitions
- Light-emitting diode system for generating homogeneous fluorescent light
- the present invention relates to the field of lighting technology, and more particularly to such systems relating to the category of flat lighting systems.
- a light image which consists of a ßildiety, a frame and a backlight, wherein on the ßildily translucent recesses are mounted as a base for pictures different glasses (also made of an acrylic) are used and for the Light reflection the back of the frame with a white or other reflective colors (also with a reflective metal) is executed.
- the object of the invention is to provide a low-cost light-emitting diode system for generating homogeneous flat light by means of light emitting diodes with defined light exit angle, which arrives with an absolute minimum height and still achieves an optimal lighting effect.
- this object is achieved in that the frame is provided with a reflective plate, which is partially bent, and a transparent film with bilaterally grained surface structure, said film covering the frame with a curvature, and the LEDs at regular intervals a board strip are mounted, which is fixed at the beginning of the reflective plate in the frame, so that the LEDs radiate in exactly horizontal direction.
- the curve of the plate which is lined with a white reflective layer, begins approximately in its center and increases continuously.
- the shape of the waveform has been accurately determined in a long series of experiments, allowing the light to be generated and distributed evenly over the distance of the total irradiation depth to the outer angles, regardless of the size of the total area of the lighting system.
- the number of LEDs depends on the depth of irradiation. Larger distances between the LEDs lead to dark spots in the illumination area. In the course of systematic experiments with different large areas of light, it was found that doubling the length (irradiation depth) of the object doubles the number of LEDs, while at the same time halving the indicated value of the emitting angle of the LEDs.
- a foil covering the frame with a given curvature is as important here as the number of LEDs, as it allows the light of the LEDs to be produced by many matched refractive angles produced by the exact curve of the foil to distribute evenly, as well as to radiate towards the viewing side at the same time.
- a pop-up mechanism in the frame, which activates the power supply by batteries or renewable energy sources.
- This mechanism which has been known for a long time, into the system in combination with its low weight allows it to be used inter alia. to realize novel applications that are particularly suitable for mobile use.
- various additional combinations can be arranged in the frame - such as e.g. different types of motion detectors, color change programming etc.
- Fig. 1 the overall view of the light-emitting diode system
- Fig. 2 the board strip with LEDs
- Fig. 6 the light-emitting diode system with folding on - mechanism.
- the light-emitting diode system generally consists of a frame 1, on which a reflective plate 2 is housed, and which is covered with a transparent film 3.
- the backlight consists of the LEDs 4, which are mounted at the same distance on a board strip 5.
- the board strip is attached to the frame at the beginning of the plate 2 (eg by the folds 10).
- the distance (the entire object 9 measures 85 x 150 mm) is max. 16 mm (measured Middle to center) at a 45 degree LED cut angle. This is the absolute lower limit in terms of uniform illumination and light emission of the system.
- the height of the frame H is determined here only by the diameter of the LEDs and, in the case of larger areas of light, additionally by the radiation angle of the LEDs.
- the total height of the system is not more than 7 mm.
- the height of the frame is increased by a factor of 1.4 by the bent-out part 6 of the plate 2 - i. every further doubling of the length (the width is in principle endless) entails an increase of the height of the frame by a factor of 1.4. This ratio was determined by several experiments.
- the film 3 is mounted with the aid of the double-sided adhesive strips 7 with the curvature 8 on the frame.
- the peak K of the curvature is 2 - 3 mm. This allows the "correct" uniform distribution of the light.With the enlargement of the length of the object 9 also applies the above-mentioned regulation - every doubling of the length brings an increase of the peak K by a factor of 1.4 and thus simultaneously a change in the curvature of the Film with it, which causes the highest possible light efficiency.
- the backlit object 9 (e.g., a transparent image) may be placed directly above the film 3 without a gap.
- the frame 1 is equipped with the folding mechanism 10. This allows an automatic backlighting of the object 9 to cause the opening of the lid 11.
- This mechanism in the backlighting of flat information carriers brings about a particularly positive surprise for the addressees, due to the unexpected lighting effect (in particular if the system is designed as a postcard, advertising folding card, invitation card or art card).
- the proposed construction is particularly easy and can be due to its flatness and relatively uncomplicated place in modern technical objects, which today is considered to be very important in a progressive minimization and mobility of the technique.
- the height or flatness of the new construction corresponds essentially only to the diameter of the LEDs zuzuglich few mm for the film. 3
- the light emanating from the LEDs was able to pass through the film 3 to the object 9 to be backlit. Thanks to the white reflecting plate 2 with the curved part 6 and the transparent film 3, the light is distributed evenly on the object 9.
- the proposed system can be made essentially in the form of a blister (deep draw tube) or injection molded part which is mounted on a sturdy support or integrated in an EVA sandwich panel.
- the current - carrying parts of the system can be embedded in Siezharz and, in addition, they are sealed air - tight and watertight; this is done by means of a glass or transparent plastic disc towards the light emitting side.
- the light emitting diode system can function as a lamp that can replace conventional UV (black light) lamps, providing effective illumination of images and fonts from UV active materials.
- the proposed system can also be made as a picture frame provided with two current-conducting hitches, in which two power wires are hooked, which lead to a busbar, which serves as a source for feeding low-voltage current and at the same time as a suspension device. Thanks to their special qualities in terms of flatness, mobility and very low production costs, the invention can be used in many different applications - eg to increase the attractiveness of products such as photo frames, cups, calendars, bags, furniture, sports equipment, accessories, etc., including the Use of translucent lenticular lenses (3D images) can be used.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005002925T DE112005002925A5 (en) | 2004-09-14 | 2005-09-14 | Light-emitting diode system for generating homogeneous flat light |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004044358.0 | 2004-09-14 | ||
DE200410044358 DE102004044358A1 (en) | 2004-09-14 | 2004-09-14 | Light-emitting diode system for generating homogeneous flat light |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006029595A1 true WO2006029595A1 (en) | 2006-03-23 |
Family
ID=35502648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/001560 WO2006029595A1 (en) | 2004-09-14 | 2005-09-14 | Light-emitting diode system for creating uniform planar light |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102004044358A1 (en) |
WO (1) | WO2006029595A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202010004453U1 (en) | 2010-03-31 | 2010-07-15 | Bürgel, Lonka | Lithophane illustration with integrated front lighting |
DE202014002697U1 (en) * | 2014-03-27 | 2014-04-08 | H4X E.U. | Modular light source module for a luminaire and luminaire |
DE102015104331A1 (en) * | 2015-03-23 | 2016-09-29 | Siteco Beleuchtungstechnik Gmbh | LED module with paddle-shaped reflector and luminaire with corresponding LED module |
CN104820311B (en) * | 2015-05-21 | 2018-02-27 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5064276A (en) * | 1988-07-01 | 1991-11-12 | Hitachi, Ltd. | Light source for planar illumination in liquid crystal device |
US5166815A (en) * | 1991-02-28 | 1992-11-24 | Novatel Communications, Ltd. | Liquid crystal display and reflective diffuser therefor including a reflection cavity section and an illumination cavity section |
DE29714705U1 (en) | 1997-08-18 | 1997-10-09 | Fischer Dirk Dr Ing | Light-emitting diode lighting for wall pictures, art prints, paintings, postcards, posters, sea charts, maps for airspace or other correspondingly flat media |
DE29910235U1 (en) | 1999-06-11 | 2000-03-23 | Petersen Klaus | Light pictures |
US6257737B1 (en) * | 1999-05-20 | 2001-07-10 | Philips Electronics Na | Low-profile luminaire having a reflector for mixing light from a multi-color linear array of LEDs |
WO2004053391A1 (en) * | 2002-12-06 | 2004-06-24 | Masoud Pajouh | Device, particularly for illuminating pages of books newspapers or similar |
-
2004
- 2004-09-14 DE DE200410044358 patent/DE102004044358A1/en not_active Withdrawn
-
2005
- 2005-09-14 WO PCT/DE2005/001560 patent/WO2006029595A1/en not_active Application Discontinuation
- 2005-09-14 DE DE112005002925T patent/DE112005002925A5/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5064276A (en) * | 1988-07-01 | 1991-11-12 | Hitachi, Ltd. | Light source for planar illumination in liquid crystal device |
US5166815A (en) * | 1991-02-28 | 1992-11-24 | Novatel Communications, Ltd. | Liquid crystal display and reflective diffuser therefor including a reflection cavity section and an illumination cavity section |
DE29714705U1 (en) | 1997-08-18 | 1997-10-09 | Fischer Dirk Dr Ing | Light-emitting diode lighting for wall pictures, art prints, paintings, postcards, posters, sea charts, maps for airspace or other correspondingly flat media |
US6257737B1 (en) * | 1999-05-20 | 2001-07-10 | Philips Electronics Na | Low-profile luminaire having a reflector for mixing light from a multi-color linear array of LEDs |
DE29910235U1 (en) | 1999-06-11 | 2000-03-23 | Petersen Klaus | Light pictures |
WO2004053391A1 (en) * | 2002-12-06 | 2004-06-24 | Masoud Pajouh | Device, particularly for illuminating pages of books newspapers or similar |
Also Published As
Publication number | Publication date |
---|---|
DE112005002925A5 (en) | 2007-09-13 |
DE102004044358A1 (en) | 2006-03-16 |
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