CN1226331A - Large-area fiber optic display using piezoelectric shutters - Google Patents
Large-area fiber optic display using piezoelectric shutters Download PDFInfo
- Publication number
- CN1226331A CN1226331A CN97196726A CN97196726A CN1226331A CN 1226331 A CN1226331 A CN 1226331A CN 97196726 A CN97196726 A CN 97196726A CN 97196726 A CN97196726 A CN 97196726A CN 1226331 A CN1226331 A CN 1226331A
- Authority
- CN
- China
- Prior art keywords
- optical gate
- twin lamella
- mentioned
- retainer
- twin
- Prior art date
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/305—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being the ends of optical fibres
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
A piezoelectric shutter (24) is arranged in a comb pattern (26) and presents a core. The comb is provided with at least one tooth constituting the shutter, the bore being arranged with elevation allowing the displacement of the shutter by the piezoelectric effect. The device is remarkable in that it comprises at least one bimorph (14) arranged on the support, capable of being raised with respect to the support by the piezoelectric effect.
Description
Invention field
The present invention relates to utilize optical gate to switch the light of photoconduction fiber end, be specifically related to the applying piezoelectric twin lamella and make optical gate on the display screen.
Background of invention
Large-area display for example lively scoreboard of using of sports center etc. has been well-known in this technology.This display generally is referred to as the secondary emission display, and wherein light is from penetrating as cathode-ray tube (CRT) and TV type screen.The problem that produces with this display is to be restricted from the fluorescence intensity that display screen sends, and therefore under the strong situation of ambient lighting, the reflectance of display is low, seems painstaking.
Application twin lamella photomodulator can be seen as at least in theory and can overcome the more above-mentioned method that conventional large area display has problems of using.For example disclosing this system among the United States Patent (USP) N0.4844577 and 5052777, these two patents have transferred the Sportsoft Systems company in Canadian Burnaby city when issue.The advantage of these systems is that the display of using twin lamella is not subjected to for example restriction of the physical property of fluorescent substance of any secondary emission type material in the light intensity of each pixel region.In addition, this display can be done very greatly because the light that light source sends can utilize optical channel for example the optical light guides fiber guide and need not deflection beam to the very big pixel of number with the whole screen of raster scanning.
The problem that method and other similar approach had used in the Sportsoft patent be, the assembling of this twin lamella system is extreme complicated and take a lot of work, and the result is that system is difficult to compete on market.Therefore the improved twin lamella of needs system makes this system simpler than prior art system, and helps to adapt to automatic manufacture method.
Brief summary of the invention
The present invention relates to the piezoelectric type optical gate with the setting of pectination pattern, have a central construct, this central construct is equipped with at least one tooth that constitutes optical gate, and this central construct can raise, and therefore can sharp piezoelectric effect make the optical gate displacement.This solution route is effectively for reducing labour costs and improving mass-produced ability.
The corresponding method of known modern crafts has very important disadvantages.The present invention attempts to overcome these shortcomings.
The present invention has advised at least one twin lamella thus, and this two wafer configuration and can utilize piezoelectric effect that twin lamella is raise with respect to supporting member on a supporting member, thereby makes shutter action.
In a preferred embodiment, each above-mentioned twin lamella is bonded on the above-mentioned pectination supporting member.
In advantageous embodiments, with drop mode coating adhesive, to allow to apply the capillary action of displacement acting force.The result is that special light twin lamella can correctly be aimed at, thereby can obtain accurate in locating, makes shutter system more reliable.
In than advantageous embodiments, selected bonding agent is polymerisable material.Therefore when the adhesives generation polymerization of bonding operation back, shrink effect.
In further advantageous embodiment, adhesives is very sensitive to UV radiation.Therefore when the radiation irradiation bonding region, help being adhesively fixed of each twin lamella.
In specific embodiments of the invention, each twin lamella preferably bends certain angle along the direction of above-mentioned supporting member in one end thereof, though, can bend in either direction if desired.This structure can guarantee directly to close with twin lamella itself.Piezoelectric effect rises twin lamella simultaneously, thereby guarantees passing through of light, or on the other hand, drops to rest position, guarantees to cut off light.
Of the present invention than specific embodiment in, each twin lamella is bent into the right angle, thereby can guarantee cutting action easily.
In embodiment more specifically, retainer is set in device, the upward stroke of this retainer restriction twin lamella, thus prevent to cause the vibration of error.
In a preferred embodiment of the invention, above-mentioned retainer is configured to overhanging, and recessed to its opposed end from the twin lamella bending end, thereby can prevent that above-mentioned bent angle from partly meeting this retainer.By this way, during opening and closing optical gate, can prevent that the edge at the angle of twin lamella is bonded on this retainer, thereby avoid interference the normal running of optical gate.
Describe below in conjunction with exemplary accompanying drawing, the present invention may be better understood thus and additional feature and advantage.
Brief description of drawings
The piezoelectric type shutter system synoptic diagram that Fig. 1 makes by the principle of the invention;
Fig. 2 is the cross-sectional view as the piezoelectric bimorph of optical fiber optical gate;
Fig. 3 is the squiggle figure that is positioned at the photosensitive device record in optical fiber/optical gate the place ahead;
Fig. 4 is the skeleton view of the preferred embodiment of the present invention;
Fig. 5 is the elevation view that shows the embodiment that examines Fig. 4, comprises other details about light source;
Fig. 6 is the synoptic diagram according to the screen assembly pixel arrangement of principle of the invention making;
Fig. 7 a is fixed on the side view that a twin lamella on the plug-in unit is installed;
Fig. 7 b is fixed on the planimetric map that a twin lamella on the plug-in unit is installed;
Fig. 8 a is the side view by the twin lamella pectination member of principle of the invention making;
Fig. 8 b is the planimetric map by the twin lamella pectination member of principle of the invention making;
Fig. 9 is a front view, and the retainer of protrusion is shown, no matter be to open or off-position, this twin lamella all contacts with this retainer;
Figure 10 is the skeleton view of twin lamella downside of the present invention, and an embodiment is shown, and wherein coats infrared coating at the rear side of optical gate;
Figure 11 is the skeleton view that is similar to the twin lamella downside of the present invention of Figure 10, and another embodiment is shown, and wherein the rear side at optical gate adopts infrared reflection film;
Figure 12 is the side cross-sectional view of twin lamella of the present invention, twin lamella is shown is in the position of opening;
Figure 13 is the cross-sectional view of the twin lamella of the present invention of similar Figure 12, twin lamella is shown is in the position of closing.
The explanation of preferred embodiment
Clearly, the present invention can be used in the large-area fiber optic display device, has adopted the piezoelectric type optical gate in this device according to the present invention.The feasible optical gate that might develop new high brightness of the appearance of new polymer piezo material.Under the situation of the light that is used to switch the optical fiber end place, can envision the large colour visible display device.
The exploitation that is designed for the xenon lamp of the little fibre bundle of effective and even feed-in makes might develop the very display device of high brightness now.The following describes this system.
Piezoelectric is known.They are such crystal of image-stone English or the pottery as PZT.Piezoelectricity originates from and have permanent internal polarization in dielectric.Mechanical tension has changed dipole moment, thereby produces external electrical field.On the contrary, if add external electrical field, then dipole moment itself causes mechanical deformation with reorientation.
Developed piezopolymer recently.Sell with sheet or drum on market, thickness can be used for various aspects (in particular as optical gate) between 9 μ m and 1mm.
With reference now to Fig. 1,, two piezopolymers 10,12 with opposite polarity are bonded in together, form bender element or twin lamella 14.
Work as stress application, when causing impressed voltage, wherein one deck 10,12 just extends or expands, and another layer then shrinks, and causes the assembly bending or becomes curved.When from the opposite utmost point stress application, twin lamella is crooked in opposite direction.The structure of twin lamella becomes the little change transitions of length the motion of the end 16 of twin lamella.
If end 16 is bent into the right angle and assembly is placed on the optical fiber 18, as shown in Figure 1, then the light that penetrates from the optical fiber that stops and open respectively will be switched in the end.
Carried out about twin lamella bending/recurvate experiment, shown the stacked effect of the bonding agent of the metal that forms the twin lamella overlapped layers, as shown in Figure 2.When obtaining model, just can obtain to select the standard of length, bonding agent and metal thickness according to the latter.
Fig. 3 is a curve map, and this figure is the waveform of output terminal record that is placed on the photosensitive device in the optical fiber/optical gate the place ahead that constitutes by the principle of the invention.Rise and be illustrated in fall time in the scope of 3ms.For the active length of 25mm and this end deflection of impressed voltage 25mm of 250V.Also developed the inconstant model of thickness and width.It is very complicated analyzing formula, adopts the programming of method of approximation and symbol to find the solution.The result shows, adopts non-constant size rise time or deflection to there is no improvement.
When operative installations, initial consideration is, screen has relative reduced size (for example the assembly of 180mm * 180mm) constitutes by many.
The primary element of each assembly 20 (Fig. 5) is made of plate 22.Each plate 22 itself comprises the contact that the optical gate that is configured to comb shape 24, PCB P.e.c. sheet and the control optical gate of for example 30 optical fiber 18 of some and 30 twin lamella forms require.This assembly is shown in the enlarged drawing of Fig. 4.Each twin lamella 14 is installed on rigidity or the flexible installation plug-in unit 27 (Fig. 7 a, 7b, 8a, 8b), so that many twin lamellas are assembled into pectination assembly 26.The most handy 30 blocks of plates constitute assembly 20 as shown in Figure 5, and forming 30 optical fiber * 30 optical fiber spacing thus is the fiber optic network of 6mm.These optical fiber are converged into three bundles that separate 28 at the back side (in the upstream of optical propagation direction) of assembly, and each plate is connected in control P.e.c. sheet.In addition, red, green, blue color separation filter 30 is configured in the front of each respective bundles.
The most handy 60W metal halide discharge lamps 40 provides illumination (Fig. 5).Light is coupled in mixer 41, can guarantee on each assembly maximum like this and illuminates red, green, blue bundle 6 equably.Assembly 20 can reach the 20000 nits (level of candle/m2) in the illumination of peak value white light.The surface of each assembly is by the optic network protection as shown in Figure 5 of astigmatism, thereby can realize the contrast and the visual angle that require.Optic network is designed to also guarantee the heat insulation of assembly 20, and method is to adopt the mezzanine configurations that air-gap is arranged.
When assembling, the interval between the assembly has kept the interval of about 6mm between the optical fiber, does not have observable gap or spacing.
In the generation of the configuration of pixel 50 and gray scale, each pixel is made up of 9 optical fiber, and every kind of color has 3 optical fiber, as shown in Figure 6.Color is by the diagonal pattern configuration, and known human eye is to not too sensitive to corner structure.The preferably about 18mm in interval between the contiguous pixels.
Because twin lamella of the present invention is a kind of open-close formula device basically, so can produce gray scale by modulating pulse width.If the dynamic perfromance of twin lamella is limited, then adopt digital filtering to be transformed into per second 40 pictures from PAL-system or TSC-system system as circulation.Generally speaking, in known device, can only produce the ash in class III degree.With respect to the renewal speed of picture because the restriction of the mechanical frequency responsive bandwidth of twin lamella also has problems.
Because this device every kind of color in a pixel adopts three kinds of optical fiber of different size, so, then can increase gray level if the cross section of optical fiber keeps correct ratio to avoid unnecessary and to use evenly constantly at interval.Use 1: 3 surface ratio in this embodiment.Therefore if every kind of optical fiber is with three levels, then every kind of color can produce 27 levels.These approximate 5 bits of every kind of color that convert to.
In operation, just can open and close (switch) each optical fiber 18 selectively by between upper-lower position, driving bicrystal sheet 14, twin lamella retainer or protuberance 60 (Fig. 9 and 12) on one or more when last position, this moment, optical fiber was opened, and when upper/lower positions, twin lamella is against one or more retainer or protuberances 62 (Fig. 9 and 13) down, and this moment, optical gate 24 covered the far-end of corresponding optical fiber 18, make optical fiber closure, thereby prevent light to penetrate.Only contact at opening and closing position twin lamella with the protrusion retainer.
Importance of the present invention is shown inspection Figure 12.Upper convex portion 60 is arranged in the critical zone of extending as shown in figure 12, thereby can guarantee to be suppressed at any parasitic vibration in the motion twin lamella.
Figure 10 and 11 illustrates another favourable notion of the present invention, promptly adopts infrared coating 70 (Figure 10) or infrared reflection film 80 (Figure 11), and this film is connected the back side of optical gate 24 with bonding agent etc.The heat that this infrared coating or film reflection are produced by light source, thereby can protect optical gate 24 not damage because of overheated.
Use threshold values modulation profile multiple error diffusion algorithm and can obtain another embodiment.Can be enough high and avoid flicker as speed.Critical flicker frequency increases with brightness or illuminance and surface size.In addition, human eye is not too responsive to the flicker of line when line is diagonal line.Used this effect, as shown in Figure 6, it obtains significant effect.
For the structure of screen, assembly 20 is configured to the sub-screen be made up of 48 assemblies, sub-screen is combined just to form the screen with virtually any size or shape then.Front surface is uniformly, thereby is not having visible seams between the assembly and between the corresponding subframe.
Although by various object lessons and embodiment the present invention is described, should be understood that to the invention is not restricted to these embodiment that the present invention can implement in varied mode in the scope of following claims.
Claims (15)
1. a piezoelectric type optical gate is arranged to the pectination pattern, has supporting structure, and at least one tooth is housed, this supporting structure is configured to it and can be raised, thereby can optical gate be moved by piezoelectric effect, it is characterized in that, it comprises that at least one constitutes the twin lamella of above-mentioned optical gate, this twin lamella is arranged on the supporting member, and can raise with respect to supporting member by piezoelectric effect.
2. optical gate as claimed in claim 1 is characterized in that, above-mentioned twin lamella comprises interconnective and has two sheets of different qualities.
3. optical gate as claimed in claim 1 is characterized in that, above-mentioned twin lamella is bonded in the above-mentioned pectination supporting.
4. optical gate as claimed in claim 1 is characterized in that, each twin lamella end is therein located to bend predetermined angle along the direction of above-mentioned supporting.
5. optical gate as claimed in claim 4 is characterized in that each twin lamella is bent into the right angle basically.
Therefore 6. optical gate as claimed in claim 5 is characterized in that, retainer is set in said apparatus, can limit the stroke of twin lamella and prevents vibration.
7. optical gate as claimed in claim 6 is characterized in that, above-mentioned retainer is configured to overhanging and contracts behind its opposed end from the folded end of twin lamella, thereby prevents that above-mentioned angle part from meeting this retainer.
8. optical gate as claimed in claim 1 is characterized in that, mark is provided, in case twin lamella moves on to their scope outside.
9. optical gate as claimed in claim 1 is characterized in that, the pectination member comprises a monodentate.
10. optical gate as claimed in claim 9 is characterized in that, the pectination member comprises four teeth.
11. optical gate as claimed in claim 1 is characterized in that, forms this retainer in critical stopper region scope.
12. optical gate as claimed in claim 11 is characterized in that, retainer is made of the protuberance of minimum.
13. optical gate as claimed in claim 1 is characterized in that, the twin lamella supporting member is transparent, thereby it is instant bonding to obtain to allow to pass above-mentioned ultraviolet ray.
14. optical gate as claimed in claim 1 is characterized in that, provides other coating to twin lamella, as bonding parts or coating.
15. optical gate as claimed in claim 14 is characterized in that, this coating strong reflection infrared radiation and visible light.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE9600509 | 1996-06-05 | ||
| BE9600509A BE1010327A7 (en) | 1996-06-05 | 1996-06-05 | MODULATION DEVICE, ELECTRO-OPTICAL LIGHT INCLUDING bimorphs. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1226331A true CN1226331A (en) | 1999-08-18 |
Family
ID=3889784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97196726A Pending CN1226331A (en) | 1996-06-05 | 1997-06-05 | Large-area fiber optic display using piezoelectric shutters |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1008130A4 (en) |
| JP (1) | JP2001517318A (en) |
| KR (1) | KR20000016294A (en) |
| CN (1) | CN1226331A (en) |
| AU (1) | AU739206B2 (en) |
| BR (1) | BR9709542A (en) |
| CA (1) | CA2257269A1 (en) |
| IL (1) | IL127391A0 (en) |
| NZ (1) | NZ333358A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7522789B2 (en) * | 2004-05-29 | 2009-04-21 | Polatis Ltd. | Optical switches and actuators |
| CN106782100A (en) * | 2016-12-11 | 2017-05-31 | 北京方瑞博石数字技术有限公司 | A kind of optical fiber being made up of hexagonal fiber is led as screen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5052777A (en) * | 1988-04-27 | 1991-10-01 | Sportsoft Systems, Inc. | Graphics display using bimorphs |
| CA2175198A1 (en) * | 1993-10-29 | 1995-05-04 | Jeong Beom Ji | Thin film actuated mirror array and methods for its manufacture |
| US5563977A (en) * | 1995-05-24 | 1996-10-08 | General Electric Company | Display system having greyscale control of fiber optic delivered light output |
-
1997
- 1997-06-05 AU AU33012/97A patent/AU739206B2/en not_active Ceased
- 1997-06-05 BR BR9709542-7A patent/BR9709542A/en unknown
- 1997-06-05 CA CA002257269A patent/CA2257269A1/en not_active Abandoned
- 1997-06-05 KR KR1019980709867A patent/KR20000016294A/en not_active Application Discontinuation
- 1997-06-05 IL IL12739197A patent/IL127391A0/en unknown
- 1997-06-05 NZ NZ333358A patent/NZ333358A/en unknown
- 1997-06-05 CN CN97196726A patent/CN1226331A/en active Pending
- 1997-06-05 JP JP50085398A patent/JP2001517318A/en active Pending
- 1997-06-05 EP EP97928851A patent/EP1008130A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| IL127391A0 (en) | 1999-10-28 |
| EP1008130A1 (en) | 2000-06-14 |
| CA2257269A1 (en) | 1997-12-11 |
| BR9709542A (en) | 2000-01-11 |
| JP2001517318A (en) | 2001-10-02 |
| KR20000016294A (en) | 2000-03-25 |
| AU739206B2 (en) | 2001-10-04 |
| AU3301297A (en) | 1998-01-05 |
| EP1008130A4 (en) | 2000-08-09 |
| NZ333358A (en) | 2000-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1086894C (en) | Light projection method and projection type image display device for realizing said method | |
| US6791636B2 (en) | Backlight for a color LCD | |
| CN1111891C (en) | Plasma display system | |
| KR102309878B1 (en) | Back light unit and display device comprising it | |
| US4978952A (en) | Flat screen color video display | |
| CN102023380B (en) | Display device | |
| JP3202856B2 (en) | Image reading device | |
| TWI226957B (en) | A liquid crystal display, a light source device for use therein and a method of driving the same | |
| CN100443980C (en) | Light beam guiding method, optical fiber equipment, back light assembly and liquid crystal display device | |
| WO2001084228A1 (en) | Image display device and method of manufacturing a light conductor for such an image display device | |
| EP3177868B1 (en) | Tiled assemblies for a high dynamic range display panel | |
| CN105549267A (en) | Backlight module and display device | |
| US4636035A (en) | Transparent rear projection screen | |
| JP2007005277A (en) | Surface light source device, optical member, and manuscript reader and surface light source device using the same | |
| CN1241263A (en) | Projection type display | |
| CN1226331A (en) | Large-area fiber optic display using piezoelectric shutters | |
| US5917986A (en) | Large-area fiber optic display using piezoelectric shutters | |
| US7965356B2 (en) | Liquid display device and method for fabricating the same | |
| CN212846297U (en) | Light supplementing device and monitoring equipment | |
| CN1756976A (en) | Collimated scanning backlight device | |
| WO2004023176A1 (en) | A high contrast display panel | |
| US20060114421A1 (en) | Image projector with a two-dimensional array of light-emitting units | |
| KR100737878B1 (en) | Reflection type liquid crystal display device | |
| KR100786065B1 (en) | Optical Source in Liquid Crystal Projector | |
| JPH06317797A (en) | Surface light source device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1022031 Country of ref document: HK |