CN100454054C - Method for mounting a surface lighting system and surface lighting system - Google Patents
Method for mounting a surface lighting system and surface lighting system Download PDFInfo
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- CN100454054C CN100454054C CNB2005800163510A CN200580016351A CN100454054C CN 100454054 C CN100454054 C CN 100454054C CN B2005800163510 A CNB2005800163510 A CN B2005800163510A CN 200580016351 A CN200580016351 A CN 200580016351A CN 100454054 C CN100454054 C CN 100454054C
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- support body
- flexible support
- surface lighting
- lighting system
- radiation source
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- 230000005855 radiation Effects 0.000 claims abstract description 78
- 230000003287 optical effect Effects 0.000 claims abstract description 64
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 61
- 238000005452 bending Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000003760 hair shine Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
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Abstract
The invention relates to a method for mounting a surface lighting system having an electromagnetic radiation-emitting front side, wherein at least one primary radiation source (2) that can emit electromagnetic radiation during operation is arranged on at least one mounting area (11) of a flexible carrier (1). The flexible carrier (1) has a front side and a back side opposite the front side, wherein the front side of the flexible carrier (1) defines a reference plane. The mounting area (11) of the flexible carrier (1), on which the primary radiation source (2) is arranged, is bent out from the reference plane in such a way that an optical axis of the primary radiation source (2) extends parallel or diagonally relative to the reference plane. In another step, at least one light guide (7) having a radiation-emitting front side (72) and at least one coupling area (71) is placed on the flexible printed board (1) so that the primary radiation source (2) radiates into the coupling area (71) of the light guide (7) during operation and the radiation-emitting front side (72) of the light guide (7) faces in the direction of the radiation-emitting front side of the surface lighting system. Disclosed is also a corresponding surface lighting system.
Description
The present invention relates to a kind of method and a kind of surface lighting system that is used for the assembly surface luminescent system.
There is multiple application possibility for surface lighting system.For example they can be used as light-emitting device and are used in lamp or the design apparatus (Designanordnung).Particularly, surface lighting system can be used for the backlight of display such as LCD (LCD-Displays).
For example by publication US 6,646,367 B2 and US 6,241,358 B1 disclose a kind of surface lighting system, and its layered laminate ground is made of a plurality of optical conductors (Lichtleitern), and be coupled in these optical conductors in primary radiation source input laterally respectively.Yet, the unexposed assembly method that is used to make this surface lighting system in these publications.
Task of the present invention is, a kind of improved and technical simple, method and this surface lighting system of being used for the assembly surface luminescent system is described.
This task solves by having according to the method for the described step of claim 1 and the surface lighting system that has according to the described feature of claim 12.
Some advantageous forms of implementation of this method or surface lighting system have been described in dependent claims 2 to 7 or 13 to 17.
A kind of method that is used to assemble the surface lighting system in the front with emission electromagnetic radiation may further comprise the steps:
-when at least one is suitable for work the emission electromagnetic radiation the primary radiation source be placed at least one assembly area of flexible support body, this flexible support body have the front and with the opposed back side, front, wherein reference planes are determined in the front of flexible support body,
-come out from the reference planes bending in this wise in the assembly area of flexible support body, make that the optical axis in primary radiation source is parallel with reference planes or tilt,
-the flexible support body is placed on the rigid support, wherein the back side of flexible support body is towards rigid support, and
-at least one front with Radiation Emission is placed on the flexible support body in this wise with at least one optical conductor of importing coupling regime, make when surface lighting system is worked, the radiation of primary radiation source is advanced in the input coupling regime of optical conductor, and the front of optical conductor Radiation Emission is towards the direction in the front of surface lighting system Radiation Emission.
If the primary radiation source is arranged on the assembly area of flexible support body, then can by crooked assembly area the primary radiation source be introduced in the desirable position simply, so that input is coupled in the optical conductor in simple mode.Preferably, the assembly area is arranged in the fringe region of flexible support body, makes the narrow zone of flexible support body be subjected to big bending.
This method is particularly suitable for assembling the surface lighting system that comprises a plurality of optical conductors, and one or more primary radiation source is imported respectively and is coupled in these optical conductors.For this reason, optical conductor and these primary radiation sources that are set up in the input coupling regime that shines optical conductor can be assembled to respectively on the flexible support body.This setting has formed a kind of light-emitting block (Lichtkachel) basically.Light-emitting block also can comprise other element, as photoactive element, be used for clearly defined objective radiation profiles in the optical conductor and the radiation characteristic that is used for influencing surface lighting system with clearly defined objectively.
In addition, light-emitting block for example can comprise printed conductor and electronic unit and the cooling body that is used to control primary radiation source or surface lighting system.
Light-emitting block is assemblied on the rigid support and is formed for the base rack of surface lighting system.Rigid support for example can be the display rear wall.By being come Modularly to make up surface lighting system by independent supply with the light-emitting block of the light in primary radiation source respectively by a plurality of, under the uniform as far as possible situation of radiation characteristic, make display at the same time with almost any size and various geometric configuratioies.
Must be pointed out at this, needn't implement the step of this method with the order of determining.Therefore, for example can be before being placed in the flexible support body on the rigid support or settle optical conductor afterwards.Advantageously, the form of implementation of this method is for example irrelevant with single assembly technology and technology controlling and process.
In a kind of particularly preferred form of implementation of this method, electronic unit, printed conductor and/or cooling body are placed on the flexible support body.In this way, can settle actuator assembly and other to be used to control the electronic package of primary radiation source and whole surface lighting system on the one hand simply.On the other hand, cooling body, for example thin bonding jumper are placed on the flexible support body, formed heat was derived when surface lighting system was worked in permission.Particularly preferably be, settle cooling body in this wise, make that formed heat delivery went out when it can be worked the primary radiation source.Particularly, this form of implementation can realize the compact especially and light structure type of surface lighting system.
In addition, particularly preferably be, flexible printed circuit board is used as the flexible support body.This provides such advantage, simply Integrated Electronic Component and printed conductor.Therefore, for example surface-mountable electronic unit can be pasted or is welded on the circuit board that is provided with printed printed conductor.
In another preferred form of implementation of this method, produce at least one assembly area by some grooves of flexible support body, then in this assembly area, at first settle the primary radiation source.In other following step, with this assembly area in this wise bending go out reference planes, make the primary radiation source shine in the input coupling regime of optical conductor, wherein optical conductor is before with the assembly area bending or be set to afterwards on the flexible support body.
Preferably, realize the groove of flexible support body by punching press.
Preferably, in this form of implementation, in the flexible support body, provide a plurality of assembly areas, as fillet.Then can on these fillets, fix at least one primary radiation source respectively.After fixing primary radiation source, the assembly area is gone out from the reference planes bending, make corresponding primary radiation source be positioned at again on the desirable position, so that shine in the corresponding optical conductor.
In this form of implementation, the funtion part of light-emitting block, not to be installed in respectively on the flexible support body that separates, but the funtion part of a plurality of light-emitting blocks can be placed on the unique common flexible support body as optical conductor, cooling body and other electronic unit in the one or more primary radiations source under having.Particularly, all optical conductors and all primary radiation sources of surface lighting system can be placed on the unique common flexible support body.
This provides such advantage, can make the quantity minimum into the necessary electronic unit in control primary radiation source.In addition, can save electrically connecting position between the single flexible supporter.
In another preferred form of implementation of this method, such structure is applied on the rigid support, by these structures, when being arranged to the flexible support body on the rigid support, the assembly area of flexible support body is bent to the position of hope from reference planes.From the viewpoint of technology, this form of implementation of this method provides advantage, and has therefore simplified the realization of this method in practice.
In another preferred form of implementation of this method, LED device (abbreviation " LED ") is as the primary radiation source.It provides high-luminous-efficiency and compact structure and lightweight advantage.
In another form of implementation of the method according to this invention, use at least two optical conductors, they advantageously link to each other by optical coupling medium in adjacent fringe region.The material that has with the similar optical characteristics of optical characteristics that material had of optical conductor is suitable as optical coupling medium.In this way, radiation can arrive the adjacent optical conductor from an optical conductor as far as possible in the clear, and this has improved the emission characteristics of surface lighting system.If the fringe region of casting or bonding adjacent light conductor, then this is favourable to the mechanical stability of surface lighting system also.
In another preferred form of implementation of this method, the film of at least one radiation transmission is applied on the front of Radiation Emission of optical conductor.This helps to improve the mechanical stability of optical conductor composite structure equally.
In addition preferably, apply a kind of photolytic activity film, it influences the radiation characteristic of surface lighting system in desirable mode.Like this, the photolytic activity film for example can have the water chestnut column structure from the teeth outwards, is directed to from the light of back surface incident on the direction of plane normal in front of Radiation Emission.
A kind of surface lighting system according to the present invention particularly comprises:
-at least one primary radiation source, it is suitable for emission electromagnetic radiation when work,
-at least one flexible support body, it has the front and with positive opposing backside surface and have at least one assembly area, on this assembly area, pro be mounted with the primary radiation source, wherein except that the assembly area, the front of flexible support body has determined that reference planes and assembly area go out from the such bending of these reference planes, making the optical axis in primary radiation source and reference planes acutangulate obliquely abreast or with it extends
-rigid support is settled the flexible support body thereon, makes the back side of flexible support body towards rigid support, and
-at least one optical conductor, it has front and at least one input coupling regime of emitted radiation, this input coupling regime is placed on the flexible support body in this wise, make the primary radiation source when surface lighting system is worked, shine in the input coupling regime of optical conductor, and the front of the emitted radiation of optical conductor is towards the direction in the front of the emitted radiation of surface lighting system.
Preferably, surface lighting system has as the flexible printed circuit board of supporter and as the LED device in primary radiation source.
In addition, the flexible support body of surface lighting system preferably includes electronic unit, printed conductor and/or cooling body equally.
If surface lighting system comprises at least two optical conductors, then the adjacent fringe region of these optical conductors particularly preferably links to each other by optical coupling medium.
In the another kind of preferred form of implementation of surface lighting system, the front of Radiation Emission preferably has the film of radiation transmission.
From the embodiment that further sets forth below in conjunction with accompanying drawing 1a to 1b, 2a to 2e, 3a to 3b and 4a to 4b, obtain being used for other advantages of method of assembly surface luminescent system and favourable form of implementation.
Wherein:
Fig. 1 a is the schematic plan of flexible printed circuit board before crooked assembly area with link position of primary radiation source, electronic unit and side,
Fig. 1 b is the schematic sectional view of passing according to the flexible printed circuit board of Fig. 1 a,
Fig. 2 a is a schematic plan a plurality of as flexible printed circuit board in Fig. 1 a, and these circuit boards are placed on the rigid support,
Fig. 2 b is the schematic plan of the flexible printed circuit board on the rigid support,
Fig. 2 c is in the schematic plan with the flexible printed circuit board of Fig. 2 b after the bending of assembly area,
Fig. 2 d is the schematic sectional view in zone of passing the flexible printed circuit board of Fig. 2 c,
Fig. 2 e after settling a plurality of optical conductors, have a schematic plan according to the surface lighting system of the flexible support body of Fig. 2 c or 2a,
Fig. 3 a and 3b are the schematic sectional view of passing according to two deformation programs of the surface lighting system of Fig. 2 e,
Fig. 4 a and 4b are the schematic plan of other embodiment of flexible printed circuit board.
In these embodiment and accompanying drawing, identical or similar ingredient adopts identical reference number respectively.Element shown in the drawings should not regarded as and to meet ratio.More precisely, for better understanding, part is represented these elements large.
(with reference to Fig. 1 a), for example on the flexible printed circuit board 1 at the edge in primary radiation source 2, a plurality of LED are fixed in the row, and electrically contact according to first embodiment of this method with electric printed conductor.In addition, with other electronic units 3, be fixed on this flexible printed circuit board 1, and on side direction, be configured to the link position 31 that electrically contacts as the actuator assembly that is used to control LED2.Flexible printed circuit board 1 with LED 2 opposed sides on be mounted with cooling body 4 (with reference to Fig. 1 b) so that formed loss heat when deriving LED2 work.In ensuing method step, the flexible printed circuit board 1 of a plurality of such assemblings is placed on the rigid support 5 (with reference to Fig. 2 a).
In a second embodiment, in this wise groove 6 is configured in the flexible printed circuit board 1, make to form assembly area 11 right angle, narrow by three grooves that are connected 6 respectively this assembly area on a side, keep linking to each other (with reference to Fig. 2 b) with remaining flexible printed circuit board 1.In this assembly area 11, again a plurality of LED 2 are positioned to row respectively., further electronic unit 3 is arranged on the flexible printed circuit board 1 in conjunction with among the embodiment of Fig. 1 a and 1b explanation as in the above.In ensuing method step, the assembly area 11 that is applied with right angle LED 2, narrow on it is bent upwards in this wise, make LED 2 be in desirable position, so that the radiation input is coupled in the optical conductor 7 that next is placed when working later on.Narrow zone, right angle 11 for example can be bent upwards in this wise, makes it be substantially perpendicular to remaining flexible printed circuit board 1 and locatees, as appreciable among Fig. 2 c and the 2d.In this form of implementation, flexible printed circuit board 1 also is installed on the rigid support 5, on the display back side.
In another embodiment, these grooves 6 are arranged in the flexible printed circuit board in this wise, make to form vertical assembly area 11, are separately installed with a LED 2 (with reference to Fig. 4 a and 4b) in the assembly area.
In another following step, optical conductor 7 is arranged on the circuit board 1 that LED 2 and part bending are installed.It carries out in this wise, i.e. the input coupling regime 71 of difference irradiates light conductor 7 during LED 2 work, and the front 72 of the Radiation Emission of optical conductor 7 deviates from (with reference to Fig. 2 e) with flexible printed circuit board 1.
(with reference to Fig. 3 a and 3b) in another embodiment, supporting element 51 is configured on the rigid support 5, when being arranged to flexible printed circuit board 1 on the rigid support 5, these supporting elements bend to desirable position with the assembly area 11 that the flexible printed circuit board 1 of LED 2 is arranged on it and remain there.Liner plate (Laschen) 51 for example can be the liner plate 51 that the main reference planes from rigid support 5 are bent upwards.Wan Qu liner plate 51 provides such advantage vertically upward, the zone that is bent upwards 11 of flexible printed circuit board 1 and the angle between the remaining flexible printed circuit board 1 can be changed simply, and incident angle LED 2, to the optical conductor 7 can be changed thus simply.In addition, can form liner plate 51 in this wise, making also can be fixed thereon with flexible printed circuit board.
In addition, in this embodiment, the irreflexive element 8 of structure on the back side that deviates from the front 72 of optical conductor 7 and Radiation Emission is as irreflexive film or irreflexive structure.
In embodiment according to Fig. 3 a and 3b, bonding or the casting optical conductor 74 the edge.Material refractive index, radiation transmission that preferably has with the materials similar of optical conductor 7 is particularly suitable as cast material or jointing material.For example can use epoxy systems (Epoxidsysteme) as jointing material.
In another embodiment, one or more film 9 is placed in the front 72 of optical conductor 7, the transmission as much as possible of these films is by the radiation of surface lighting system imitated (imitierte).
At this preferably, this relates to photolytic activity film 9, and it for example supports prismatic structure from the teeth outwards, and the output coupled characteristic that influences surface lighting system at ground in desirable mode is arranged in this way.
Apparently, the present invention is not limited to these embodiment, but comprise the method for all changes embodiment of surface lighting system and the flexible support body assembly surface luminescent system that utilization is used for the primary radiation source, in supporter, there is assembly area bending from the main extension plane of flexible support body of radiation source to come out on it, so that radiation source is introduced desirable position towards optical conductor.
Claims (17)
1. method that is used for the assembly surface luminescent system, described surface lighting system have the front of emission electromagnetic radiation, and described method has following steps:
The primary radiation source (2) of-emission electromagnetic radiation when at least one is suitable for work be arranged to have the front and with at least one assembly area (11) of the flexible support body (1) at the opposed back side, described front on, reference planes are determined in the described front of wherein said flexible support body (1)
-come out from described reference planes bending in the described assembly area (11) of described flexible support body (1), make that the optical axis in described primary radiation source is parallel with described reference planes or extend obliquely,
-described flexible support body (1) is placed on the rigid support (5), the back side of wherein said flexible support body (1) is towards described rigid support (5), and
-at least one optical conductor (7) with the front (72) of Radiation Emission and at least one input coupling regime (71) is placed on the described flexible support body (1), make when described surface lighting system is worked, described primary radiation source (2) shines in the described input coupling regime (71) of described optical conductor (7), and the front (72) of the described Radiation Emission of described optical conductor (7) is towards the direction in the front of the described emission electromagnetic radiation of described surface lighting system, wherein:
On rigid support, be built with supporting element (51), when being placed to described flexible support body on the described rigid support, these supporting elements are described assembly area (11) bending, make the optical axis in primary radiation source and reference planes extend abreast or obliquely and assembly area (11) are remained in this position.
2. method according to claim 1 wherein described flexible support body (1) being placed in after described rigid support (5) goes up, is placed in described optical conductor (7) on the described flexible support body (1).
3. method according to claim 1 wherein before described flexible support body (1) being placed on the described rigid support (5), is placed in described optical conductor (7) on the described flexible support body (1).
4. each the described method in requiring according to aforesaid right wherein is placed in electronic unit (3), printed conductor and/or cooling body (4) on the described flexible support body (1).
5. according to each the described method in the claim 1 to 3, wherein flexible printed circuit board is used as flexible support body (1).
6. according to each the described method in the claim 1 to 3, wherein
-by groove (6) is arranged in the described flexible support body (1), realize at least one assembly area (11),
-described primary radiation source (2) is placed in the described assembly area (11), and
-described assembly area (11) bending from described reference planes is gone out.
7. method according to claim 6 wherein is provided with described groove (6) by punching press.
8. according to each the described method in the claim 1 to 3, wherein supporting element (51) is the liner plate that the main reference planes from rigid support (5) are bent upwards.
9. according to each the described method in the claim 1 to 3, wherein LED device is as primary radiation source (2).
10. according to each the described method in the claim 1 to 3, wherein use at least two optical conductors (7), and the adjacent fringe region (74) of described optical conductor (7) interconnects by optical coupling medium.
11., wherein the film (9) of at least one radiation transmission is applied on the front (72) of described Radiation Emission of described optical conductor (7) according to each the described method in the claim 1 to 3.
12. a surface lighting system, it has the front of Radiation Emission, and described surface lighting system has:
-at least one primary radiation source (2), emission electromagnetic radiation when it is suitable for work,
-rigid support (5), supporting element (51) is structured on this rigid support,
-at least one flexible support body (1), it has the front and with described positive opposing backside surface and have at least one assembly area (11), on described assembly area, pro be mounted with described primary radiation source (2), wherein the flexible support body is installed on the rigid support, make the back side of flexible support body (1) towards rigid support (5), wherein except that described assembly area (11), reference planes are determined in the front of described flexible support body (11), and described assembly area (11) bend to desirable position and remain on this position from reference planes by supporting element, make the optical axis in described primary radiation source (2) parallel or extend obliquely with respect to described reference planes, and
-at least one optical conductor (7), it has front (72) and at least one input coupling regime (71) of Radiation Emission, described input coupling regime is placed on the described flexible support body (1), make described primary radiation source (2) when described surface lighting system is worked, shine in the described input coupling regime (71) of described optical conductor (7), and the front (72) of the described Radiation Emission of described optical conductor (7) is towards the direction in the front of the described Radiation Emission of described surface lighting system.
13. surface lighting system according to claim 12, it has flexible printed circuit board as the flexible support body.
14. according to claim 12 or 13 described surface lighting systems, it has LED device as the primary radiation source.
15. according to claim 12 or 13 described surface lighting systems, it has electronic unit (3), printed conductor and/or cooling body (4) on described flexible support body.
16. according to claim 12 or 13 described surface lighting systems, it has at least two optical conductors (7), they link to each other by optical coupling medium in adjacent fringe region.
17. according to claim 12 or 13 described surface lighting systems, its front in the described Radiation Emission of described optical conductor has the film (9) of at least one radiation transmission.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004025414 | 2004-05-24 | ||
| DE102004025414.1 | 2004-05-24 | ||
| DE102004046696.3 | 2004-09-24 |
Publications (2)
| Publication Number | Publication Date |
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| CN1957275A CN1957275A (en) | 2007-05-02 |
| CN100454054C true CN100454054C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800163510A Expired - Fee Related CN100454054C (en) | 2004-05-24 | 2005-05-12 | Method for mounting a surface lighting system and surface lighting system |
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| CN (1) | CN100454054C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101565934B1 (en) * | 2008-05-23 | 2015-11-06 | 삼성디스플레이 주식회사 | Backlight assembly and display device having same |
| CN102016399B (en) * | 2008-06-04 | 2012-11-07 | 夏普株式会社 | Light guiding body, illuminating device and liquid crystal display device |
| KR20100103736A (en) * | 2009-03-10 | 2010-09-28 | 엘지이노텍 주식회사 | Light unit and display apparatus having the same |
| JP5286206B2 (en) * | 2009-09-11 | 2013-09-11 | 日立コンシューマエレクトロニクス株式会社 | Liquid crystal display |
| EP2354817A1 (en) * | 2009-12-14 | 2011-08-10 | Lg Electronics Inc. | Backlight unit, and display apparatus including the backlight unit |
| GB2498347A (en) * | 2012-01-10 | 2013-07-17 | Design Led Products Ltd | A lighting panel with side mounted top emitting LEDs |
| FR2994909B1 (en) * | 2012-08-30 | 2015-07-17 | Delphi Tech Inc | DISPLAY DEVICE EQUIPPED WITH A LIGHT GUIDE. |
| DE102017206817A1 (en) * | 2017-04-24 | 2018-10-25 | Osram Gmbh | LIGHTING SYSTEM AND HEADLIGHTS |
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| CN1284657A (en) * | 1999-08-11 | 2001-02-21 | 精工爱普生株式会社 | Side-light type surface light source device and its manufacturing method, electroptical device and electronic device |
| US6241358B1 (en) * | 1998-03-31 | 2001-06-05 | Nitto Jushi Kogyo Kabushiki Kaisha | Tandem lighting panel |
| CN1396485A (en) * | 2001-07-06 | 2003-02-12 | 阿尔卑斯电气株式会社 | Surface luminous device and liquid crystal display |
| US20030067577A1 (en) * | 2001-10-09 | 2003-04-10 | Hitachi, Ltd. | Liquid crystal display device |
| US6646367B2 (en) * | 2000-05-26 | 2003-11-11 | L-3 Communications Corporation | Field emitter for microwave devices and the method of its production |
| US6697130B2 (en) * | 2001-01-16 | 2004-02-24 | Visteon Global Technologies, Inc. | Flexible led backlighting circuit |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6241358B1 (en) * | 1998-03-31 | 2001-06-05 | Nitto Jushi Kogyo Kabushiki Kaisha | Tandem lighting panel |
| CN1284657A (en) * | 1999-08-11 | 2001-02-21 | 精工爱普生株式会社 | Side-light type surface light source device and its manufacturing method, electroptical device and electronic device |
| US6646367B2 (en) * | 2000-05-26 | 2003-11-11 | L-3 Communications Corporation | Field emitter for microwave devices and the method of its production |
| US6697130B2 (en) * | 2001-01-16 | 2004-02-24 | Visteon Global Technologies, Inc. | Flexible led backlighting circuit |
| CN1396485A (en) * | 2001-07-06 | 2003-02-12 | 阿尔卑斯电气株式会社 | Surface luminous device and liquid crystal display |
| US20030067577A1 (en) * | 2001-10-09 | 2003-04-10 | Hitachi, Ltd. | Liquid crystal display device |
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| CN1957275A (en) | 2007-05-02 |
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Granted publication date: 20090121 Termination date: 20190512 |