CN1592857A - Optical film with high contrast - Google Patents
Optical film with high contrast Download PDFInfo
- Publication number
- CN1592857A CN1592857A CN 02822147 CN02822147A CN1592857A CN 1592857 A CN1592857 A CN 1592857A CN 02822147 CN02822147 CN 02822147 CN 02822147 A CN02822147 A CN 02822147A CN 1592857 A CN1592857 A CN 1592857A
- Authority
- CN
- China
- Prior art keywords
- light
- optical system
- light source
- thin film
- globule
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
- G03B21/625—Lenticular translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Optical systems and methods are disclosed that display information. Optical systems and methods include a light source and an optical film, where the optical film has low reflectance, controlled viewing angle, low glare and/or relatively high optical transmittance for diffuse incident light. Instrument cluster is disclosed that includes such an optical film. The optical film may include display graphics. The optical film may have higher optical transmittance for diffuse incident light than for collimated incident light.
Description
Technical field
The present invention relates generally to electronic displaing part.The present invention is particularly useful for the instrument assembly and shows.
Background technology
Usually, electronic console is shown to the observer with information.The performance of display is described with the various characteristics of display.Such characteristic is exactly that display absorbs from the ability of the surround lighting that sends such as the bulb sun and observer.If display is not absorbed into the surround lighting that is mapped to display, cause contrast to reduce on the shown information that will be added to, be referred to as usually to clean.When being in the application that becomes clear very much at surround lighting, fuzzy is the problem that will be concerned about especially.For example, in the application out of doors, reduce the demonstration contrast significantly from the ambient light energy of the sun, thereby make it cause difficulty the information that the observer differentiates demonstration.A kind of such as the instrument assembly, the display that is used for automobile is subject to from cleaning of the sun general especially, the instrument assembly in automobile is hidden in the shell leads to the surround lighting that display enters the mouth with minimizing.Shell is made into black usually, further reduces the influence of cleaning by reducing from the quantity that incides light on the shell, that reflect towards the display front.
Another characteristic of display is the quantity of dazzle.The polishing front surface of display near the incident light of object towards observer's direct reflection.A kind of like this direct reflection is referred to as dazzle usually, and will be by the sight diopter (viewability) that reduces displayed information.Generally, by this surface is become the light diffuse scattering to reduce dazzle from the display front surface.A kind of like this diffuse scattering surface is referred to as mat surface (matte surface) sometimes.Usually, the front mat surface in display is what to separate with the image plane (it is the plane of displayed image) of display.A kind of like this exploration on display resolution ratio that separately reduced.Usually, the spacing between front mat surface such as image plane should be minimum, so that resolution loss is reduced to minimum.If then display resolution can not demoted by the front mat surface like that.
Another characteristic of display is the visual angle.Usually, need and in an angular field of view of being scheduled to, easily to see shown information.In some applications, also further to make the shown information can not be in sight outside this predetermined angular field of view.In other words, the sight diopter of display is limited in one specific and be to be desirable on the sight apparent place of wanting.The sight diopter of restriction display may be needs of wanting secret to consider a problem.The sight diopter that another place of wanting to be provided with a kind of like this restriction is a display then may influence the situation that this people finishes the ability to work of appointment near being positioned at a people that will see outside the apparent place.For example, in automobile, display or a kind of instrument assembly only are seen by a driver, and other passenger to can't see be desirable because it may influence their comfortable.The notice that can disperse the driver from the instrument assembly reflected light that leaves deep bead in the automobile, side window or other smooth surface.The visual angle of restriction instrument assembly for example to driver's sight apparent place, can reduce or eliminate such reflection.Generally, can will place recessed outer instrument package shell design to get the visual angle of restriction display message.
Another characteristic of display is comprehensive base plate.Usually, display will reduce to minimum to the degree of depth, is desirable so that reduce the combination and integration of displays volume.For example,, reduce to minimum to concave position in meter case to the instrument assembly in the automobile, so that conserve space, or for example, for auxiliary component makes allowances.When a display characteristic improves, other one or several display characteristic regular meeting degradation.As a result, in display, make certain compromise proposal, so that in certain given display application, satisfy performance standard best.Therefore, display when satisfying minimum performance standard, still there are the needs that improve its combination property.
Summary of the invention
Usually, the present invention relates to optical system and display.The invention still further relates to the parts in optical system and display.In one aspect of the invention, a kind of optical system comprises light source and optical thin film.This optical thin film irregularly from the incident light of light source towards observer's transmission.This optical thin film is higher than the collimation incident light to the total transmittance of diffusion incident light.
In another aspect of this invention, optical system comprises light source and optical thin film.This optical thin film from the incident light of light source towards observer's transmission.This optical thin film comprises the globule of light absorbing zone and a plurality of transmitted lights.These globules are partly imbedded in the light absorbing zone, make the part of all globules still be exposed to the observer.Part incident light from light source passes through this optical thin film towards observer's transmission.
In another embodiment of the present invention, the instrument assembly that is used for a sight apparent place display message has been described.This instrument assembly comprises light absorbing zone and transmittance substrate.A plurality of globules are partly imbedded light absorbing zone, make a part of globule still be exposed to the sight apparent place.From light source incide suprabasil light by this substrate and globule towards seeing the apparent place transmission.
The present invention also provides a kind of being used for that information is shown to the method for seeing apparent place.This method comprises light absorbing zone is applied in the transmittance substrate.The globule of a plurality of transmitted lights partly is embedded in the light absorbing zone, makes the part of all globules still be exposed to the sight apparent place.From light source incide suprabasil part light by this substrate and globule towards seeing the apparent place transmission.
In still another aspect of the invention, a kind of optical thin film comprises the substrate of transmitted light, light absorbing zone, a plurality of globules and demonstration chart.Light absorbing zone is applied in the substrate.Globule partly is pressed in the light absorbing zone, makes a part of globule still be exposed to the sight apparent place.Showing that chart is coated in the substrate and/or on the globule.The light that optical thin film is received from substrate one side joint towards the transmission of sight apparent place by globule.
Description of drawings
After the detailed description of the various embodiment of the present invention that below having considered, has linked to each other, can more completely understand and understanding the present invention with accompanying drawing, wherein:
Fig. 1 illustrates the diagrammatic side view of the optical system according to the present invention;
Fig. 2 illustrates the embodiment that the present invention adopts the collimation incident light;
Fig. 3 illustrates the embodiment that the present invention adopts the diffusion incident light;
Fig. 4 illustrates the notion at bevel angle and visual angle;
Fig. 5 illustrates the diagrammatic side view according to one embodiment of the invention optical system;
Fig. 6 A illustrates the partial view that amplifies according to one embodiment of the invention optical thin film;
Fig. 6 B is illustrated in the transmittance of optical thin film among the situation figure below 6A that collimates incident light;
Fig. 6 C is illustrated in the transmittance of optical thin film among situation figure below 6A of diffusion incident light;
Fig. 7 illustrates the diagrammatic side view according to another embodiment of the present invention optical system;
Fig. 8 illustrates the synoptic diagram in a demonstration chart front;
Fig. 9 illustrates another synoptic diagram that shows the chart front; And
Figure 10 illustrates the synoptic diagram in an other demonstration chart front.
Embodiment
The present invention generally is applicable to the application of some electronic consoles, especially, is used for the display at the environment that wants sizable component environment light absorption is fallen, and has low direct reflection, and/or has the visual angle that is controlled.The present invention is particularly suitable for the open air or has display in the environment of unusual bright source surround lighting.For example, one embodiment of the invention are fit to the usefulness for the instrument assembly in automobile, ship, train, aircraft etc. fully.In such each used, surround lighting, dazzle and uncontrolled visual angle tend to disturb see looked display.Although be discussed in more detail below all special examples of the present invention,, do not attempt to limit the present invention with special example so that when explaining various aspects of the present invention, should know.On the contrary, this attempt is will cover to belong to as the spirit of the present invention stipulated in the appended claims and all modifications within the scope, and embodiment is as substitute.
Fig. 1 describes the schematic cross-sectional of the one specific embodiments optical thin film 100 according to the present invention.Optical thin film 100 is on the correct position that is placed between light source 101 and the sight apparent place 150.This optical thin film has input face 100A and output face 100B.Send and incide light on the optical thin film 100 from light source 101, enter this optical thin film through input face 100A, and by the optical thin film transmission.This transmitted light leaves optical thin film 100 through output surface 100B towards seeing apparent place 150.Light 103 is schematically represented the surround lighting that appears at optical thin film 100 observers one side and is incided on the output face 100B of described optical thin film.
The optical thin film of one specific embodiments according to the present invention, under the situation of diffusion incident light than the collimation incident light situation under, have higher total light transmission herein incident light send from light source 101.In addition, optical thin film 100 is looked side from sight and is had at output face 100B and surpass total light absorption of 50% under the situation of diffusion incident light.In some example, total light absorption can surpass 60%.In the example that also has other, total light absorption can surpass 70%.In addition, in the present invention's one specific embodiments, the incident light that sends from light source 101 is under the situation of diffusion incident light, by the visual angle of the light of the optical thin film 100 transmissions half-cone angle less than incident light.
The optical thin film 100 of one specific embodiments contains a kind of structure according to the present invention, and this structure is set up an image plane structure of also taking on anti-dazzle on output face 100B.In other words, this structure provides diffusing surface 400B, thereby reduces or eliminates the needs that the additional anti-dazzle of surperficial 400B is handled.As a result, optical thin film 100 has higher light transmission at ratio under the situation of diffusion incident light under the situation of collimation incident light, and contains the output surface 400B with low-down direct reflection.Direct reflection to optical thin film 100 generally is less than 2%, and in certain example, direct reflection is less than 1%.In the example that also has other, direct reflection is less than 0.05%.That send and incide light on the input surface 100A of optical thin film 100 from light source 101 and can be collimation or diffusion is as described in doing more completely below.
Fig. 2 schematically illustrates the total light transmission of optical thin film 200 under collimation incident light situation.Optical thin film 200 with the surperficial 200A of input and output surface 200B is on the correct position that is placed between light source 201 and the sight apparent place 250.Light 202 is substantially parallel mutually and constitutes the collimated ray array that sends and incide optical thin film 200 input face 200A from light source 201.An incident ray 202A is formed into firing angle α at axle 210 perpendicular to the place of importing surperficial 200A and axle 210.As shown in Figure 2, light 202 has the incident angle of non-zero.Generally, the incident angle of light 202 can be taked to spend+90 any values of spending from-90.Light 202 is by optical thin film 200 transmissions, and process output surface 200B leaves this optical thin film towards seeing apparent place 250.The total light transmission of optical thin film 200 under collimation incident light situation is to be incident upon on the optical thin film and to be removed from light source 201 that send, total luminous powers by total luminous power of leaving optical thin film 200 to calculate.
Fig. 3 schematically illustrates the total light transmission of optical thin film 300 under diffusion incident light situation.Optical thin film 300 with the surperficial 300A of input and output surface 300B is on the correct position that is placed between light source 301 and the sight apparent place 350.Light 302 is constructed from light source 302 and is sent and incide diffused light array on the optical thin film 300 input face 300A.An incident ray 302A is formed into firing angle β at axle 310 perpendicular to the place of importing surperficial 300A and axle 310.Generally, to the diffusion incident light, different light has different incident angles.Can take to spend+90 any values of spending to a given incident ray 302A from-90.Light 302 leaves optical thin film by optical thin film 300 transmissions and through output face 300B towards seeing apparent place 350.The total light transmission of optical thin film 300 under diffusion incident light situation is to be incident upon on the optical thin film and to be removed from total luminous power that light source 301 sends by total luminous power of leaving optical thin film to calculate.
With reference to figure 1, the optical thin film 100 of one specific embodiments ratio under diffusion incident light situation has higher total transmittance in collimation incident light situation according to the present invention again.
For further describing the character of the optical thin film according to the present invention, Fig. 4 is illustrated in the notion at bevel angle used herein and visual angle.Optical thin film 400 with input face 400A and output face 400B is the correct positions that are placed between light source 401 and the sight apparent place 450.Light 402 constitutes all and incides the array of the incident light on the some 400C that is positioned at optical thin film 400 input face 400A.Point 400C is pointed out by mark " * ".The incident bevel angle is the angle between 402A and two end light of 402B, and is pointed out by mark γ in Fig. 4.Incident ray 402 is by optical thin film 400 transmissions, and leaves optical thin film through output surface 400B and become light 403.Transmitted ray 403 constitutes the light array with Luminance Distribution.The visual angle is the angle that its brightness is reduced to peak brightness one half, and is pointed out by mark ω in Fig. 4.
With reference to figure 1, the optical thin film 100 of one specific embodiments comes the taper light of an incident of transmission less than the form of the bevel angle of half incident light with the visual angle of transmitted light according to the present invention again.
An embodiment of optical thin film primitive schematically is shown in Fig. 5 among Fig. 1.Optical thin film 500 is the correct positions that are placed between light source 501 and the sight apparent place 550.Light from light source 501 incides on the optical thin film, and leaves optical thin film towards seeing apparent place 550.Optical thin film 500 comprises substrate 510, light absorbing zone 520, a plurality of globules 530 and optional optics thin layer 540.Substrate 510 has input face 510A and output face 510B.Input face 510A is towards light source 510.The exposed surface of globule 530 is towards any surround lighting 504 of seeing apparent place 550 and may occurring.This specific embodiments of the present invention as shown in Figure 5 shows to have hard contrast to seeing apparent place 550, reduced dazzle, and has the light that receives from light source 501 at the visual angle that is controlled usually.
Former described for rear-projection display device as rear projection screen structurally with Fig. 5 in optical thin film 500 similar optical thin films.At United States Patent (USP) 5,563, disclosed an example in No. 738.When the rear projection screen, optical thin film 500 with the exposed surface of globule 530 towards light source and basal surface is configured in light source and sees between the apparent place to the mode of seeing apparent place.In this structure, the incident light that sends from light source must be usually collimation so that the total transmittance of projection screen reaches best., according to one embodiment of the invention, light source is placed on substrate one side of optical thin film, and the globule that exposes is towards seeing apparent place.In this structure, the preferably diffusion of the incident light that sends from light source is so that total light transmission of optical thin film becomes maximum.
When the projection screen, resemble at United States Patent (USP) the 5th, 563, the globule in film that discloses in No. 738 plays the work of the condenser lens that needs the collimation incident light in order to be used for the effective focusing and the transmission of incident light.At United States Patent (USP) the 5th, 563, diffusion reduces total the light transmission of the projection screen that discloses in No. 738 becomes more with incident light usually.On the contrary, in an embodiment of the present invention, the globule 530 of optical thin film 500 plays a part partly to collimate incident light.According to this embodiment of the invention, this collimation is more effective to the diffusion incident light, total and the light transmission of optical thin film, becoming more with incident light usually, diffusion improves.Optical thin film 500 absorbs surround lighting greatly with high-level efficiency according to an embodiment of the invention, and has very low direct reflection from beholder's one side, and transmission shows the information with hard contrast from the diffused light of light source incident thereby face toward sight apparent place 550.
An advantage that adopts membrane structure among Fig. 5 is easier than the light source of collimated light output owing to designing and make the light source with diffused light output.And, want the diffusion collimated light source easier usually than the collimation diffused light source.If when especially light source was planar light source rather than pointolite, situation came to this.Generally, the output of diffused light source is by using additional optics such as optical lens to collimate.For example, usage charges are tired out the output light that Nai Er (Fresnel) lens come collimated light source in rear-projection display device.The special benefits of inventing top embodiment is that total light transmission of optical thin film becomes more with incident light that diffusion improves.So this optical thin film especially can be suitable for the usefulness for the diffused light source that comprises the diffusion planar light source fully.
With reference to figure 5, light absorbing zone 520 is configured on the output surface 510B of substrate 510 again.Globule 530 is partly imbedded in the thin layer 520.Globule 530 will be in close proximity to surperficial 510B, i.e. optics contact is desirable, so that increase the comprehensive light transmission of optical thin film 500.In zone, around the light absorbing zone 530 of globule 530 near output face 510B
*For defining, the light that receives from light source 501 by globule effectively enters aperture 531.One from light source 501, incide the surperficial 510A of input and to be formed into the light 502 of firing angle α diffracted at interface 510A place with the normal of surperficial 510A, and pass through globule 530 and optics thin layer 540 by transmission.This transmitted light leaves optical thin film 500 when light 503 forms angle β with normal.Leave angle β mainly by α, the refractive index of the refractive index of globule 530 and substrate 510 determines.Because the collimator effect of globule 530, angle β is normally little than angle α.Therefore, to the diffused light that incides on the optical thin film 500 and send from light source 501, the visual angle of transmitted light half incident bevel angle than incident light usually is little.And, big than under collimation incident light situation of the total light transmission under the diffused light situation.This is further describing with reference to figure 6A, 6B and 6C.
With reference to figure 6A, the optical thin film 600 of optical thin film is placed on light source 601 and sees suitable position between the apparent place 650 among a kind of Fig. 5 of being similar to.Only incide on the optical thin film, and leave optical thin film towards seeing apparent place 650 from light source 601.Optical thin film 600 comprises substrate 610, light absorbing zone 620, a plurality of globules 630.For being easy to illustrate and under the situation of not losing any ubiquity, optional optics thin layer 540 among Fig. 5 is not included among Fig. 6 A-6C.Substrate 610 has input face 610A and output face 610B.Input face 610A is towards light source 601.The exposed surface of globule 630 is towards observation position 650.In the close zone of output face 610B, the light absorbing zone 620 that centers on globule 630 effectively enters aperture 631 for the light that receives from light source 601 by globule defines.The exposed surface of globule 630 forms usually greater than what enter aperture 631 and leaves aperture 632.Entering aperture 631 partly determines by 630 pairs of light quantity of doing transmission from light source 601 received light of globule.
Fig. 6 B illustrates total light transmission of 600 pairs of straight accurate incident lights of optical thin film.Light 633 formations are sent from light source 601, and incide the collimated light array on the output surface 610B.Can understand to have only those to enter incident light within the aperture 631 just by globule 630 transmissions from Fig. 6 B such as dropping on of light 633B.On the other hand, dropping on the light 633A that enters outside the aperture 631 and 633C is absorbed by light absorbing zone 620 substantially and can not be transmitted to and see apparent place 650.To inciding the collimated light of the surperficial 610A of input, total light transmission of optical thin film 600 generally is less than 25%.In some example, total light transmission is less than 20%.In also having certain another example, total light transmission is less than 15%.The collimation incident light, the visual angle of light of leaving optical thin film 600 is partly by the refractive index of globule 630 with enter aperture 130
*Size determine that itself is partly determined by the diameter of globule 630 and the absorption coefficient of light of light absorbing zone 620 again.1.5 to 1.7, mean diameter is about 60 microns globule 630 for ranges of indices of refraction, and absorption coefficient of light scope is at 0.4 to 0.6 (micron)
-1Light absorbing zone, the transmitted light visual angle of collimation incident light normally less than 30 the degree.
Fig. 6 C illustrates total light transmission of 600 pairs of diffusion incident lights of optical thin film.Light 635 constitutes from light source 101
*Send and incide the diffused ray array that enters aperture 631.Incident ray has half incident bevel angle γ.Light 635 is leaving aperture 632 place's diffraction through entering aperture 631 transmissions, and with visual angle ω towards seeing apparent place 650 transmission because the collimator effect of globule 630, thus herein ω normally less than γ.The total light transmission that is understood that optical thin film 600 from Fig. 6 C is normally along with the incident light more diffusion that becomes, or of equal value saying, along with incident half-cone angle γ increases and increases.Because to constant optical power density, when γ increased, the major part incident light was through entering aperture 631 transmissions, so situation comes to this.The diffused light on inciding optical thin film input face 610A, total light transmission of optical thin film 600 generally is no more than 20%.In some applications, total light transmission is no more than 30%.In also having some other application, total light transmission is no more than 40%.In also having some other application, total light transmission is no more than 50%.Light 635 can be diffusion when leaving light source 601.Change a kind of method, light 635 can be collimation or less diffusion when leaving light source 601, and the diffusion that after through light diffusion substrate 610 transmissions, becomes or more diffusion.Change a kind of method, can put an additional optical diffusing layer between substrate 610 and light source 610, this layer half is shown in Figure 6, the light that comes diffusion to send from light source 601.
With reference to figure 5, total light transmission of optical thin film 500 normally becomes more diffusion along with incident light and increases again.In addition, to inciding optical thin film 500, and the diffused light that sends from light source 501, the visual angle of its transmitted light is normally less than the incident half-cone angle.Therefore, to diffused light source or the specular light source to combining with diffusion substrate 510, or concerning with specular light source that light diffuser not shown in Figure 5 combines, optical thin film 500 shows to have the high light throughput at narrow visual angle.The character at the narrow visual angle of optical thin film 500 is being used for ship, and is particularly useful in the instrument component design of aircraft, automobile etc.Under the example of automobile, the visual angle of conventional display is normally very big in the instrument assembly.The result can reach the deep bead of front and the window of side from the light of display, and causes dazzle to driver or other passenger reflection.For reducing this visual angle, usually the instrument assembly is hidden in the shell, cause the base plate of fascia to become big.Optical thin film 500 is attached to the visual angle that has reduced to be used for this instrument display in the instrument assembly.Therefore, just need or do not need display is hidden in the shell hardly.
Light absorbing zone 520 is that design is absorbed into a big chunk surround lighting of being mapped on optical thin film 500 observers one side.With reference to figure 5, ambient light 504 enters optics thin layer 540 from observer's one side, and is transmitted in the light absorbing zone 520 through globule 530, here is absorbed basically.Optical thin film 500 has absorbed very most surround lighting, thereby, even under the situation that strong surround lighting occurs, show that the information with hard contrast is to seeing apparent place 550.For example, in automobile, the instrument assembly that combines optical thin film 500 absorbs very most surround lighting, thereby, even under the situation that strong surround lighting occurs, for example can give the driver, show information with hard contrast.Concerning the light of looking a side incident from sight, the light absorption of optical thin film 500 part ground is relevant with the absorption coefficient and the thickness of light absorbing zone 520.The absorption coefficient of light of light absorbing zone can be 0.01 to 10 (micron)
-1Scope within.More preferably, absorption coefficient is at 0.1 to 5 (micron)
-1Scope within.Even more preferably, the absorption coefficient of light is within the scope of 0.3 to 1 (micron) 1.The thickness of light absorbing zone is partly determined by the average-size of globule 530 and the standard deviation of bead size.The thickness of light absorbing zone can be 0.1r within the scope of 0.9r, and r is the mean radius of globule 530 herein.In some example, this thickness can be 0.3r within the scope of 0.7r.In also having other example, this thickness can be 0.4r within the scope of 0.6r.
Though can adopt the multilayer globule in some applications, globule 530 forms has the individual layer of high loading density so that the comprehensive transmissivity of optical thin film 500 is the best is desirable.Optical thin film 500 particularly advantageous character are that the surface of globule 530 forms lacklustre surface in the optical thin film outside towards the observer.In other words, towards seeing apparent place 550 transmission diffusion incident lights, and globule 530 forms lacklustre surface to globule 530 simultaneously with high throughput and hard contrast.Mat surface reduces or eliminates dazzle (very little direct reflection is promptly arranged).According to one embodiment of the invention, the mat surface of optical thin film output surface reduces or eliminates the needs that the extra anti-dazzle of optical thin film is handled.Image plane (being the plane of displayed image) be in close proximity to globule 530 or with globule 530 corresponding to application in because the mat surface in the optical thin film outside, so almost there is not or do not have the loss of resolution.The minimizing of this dazzle that the exposed surface by globule 530 obtains is main relevant with the distribution of bead size and bead size.Usually, less globule is to be more efficiently aspect the direct reflection reducing dazzle.Optical thin film 500 generally is less than 2% from the direct reflection of observer's one side.In some example, direct reflection is less than 1%.In also having other example, direct reflection is less than 0.05%.Optical thin film 500 low-down direct reflections make this film be applicable to fully in the display application that does not need very much dazzle.The display that optical thin film 500 is specially adapted to use out of doors maybe can cause not wanting significantly and very much in the application of very bright surround lighting of dazzle.For example, in automobile, almost do not have or do not have and need extra anti-dazzle be dealt with, just can reduce or eliminate dazzle significantly in conjunction with the instrument assembly of optical thin film 500.And, at globule 530 pie graph image planes or very under the situation near image plane, there is not or almost do not have the loss of resolution.Under the situation that lacks optics thin layer 540, the diffuse reflectance of learning film from observer's one sidelight generally is less than 10%.In some example, diffuse reflectance is less than 8%.In also having other example, diffuse reflectance is less than 5%.Optics thin layer 540 preferably can preferable plated film compatibly to the exposed region of globule 530 and the thin layer of the height transmitted light on the light absorbing zone 520, plan to improve the combination property of optical thin film 500.Optics thin layer 540 can be that a kind of hard coating is to improve the durability of optical thin film 500.Optics thin layer 540 can be the comprehensive light throughput of a kind of antireflection coating with raising optical thin film 500, and reduces the integrated reflectance of optical thin film 500 simultaneously from observer's one side.Under this occasion, generally be less than 8% from the diffuse reflectance of the optical thin film 500 of observer's one side.In some example, diffuse reflectance is less than 4%.In also having other example, diffuse reflectance is less than 2%.Optics thin layer 540 also can have the visual angle that light diffusion character is further controlled the light that leaves this optical thin film.Optics thin layer 540 also can comprise pigment.
Usually, from observer's one side, high minute surface and diffuse reflectance have reduced the contrast of display.According to one embodiment of the invention, optical thin film 500 has absorbed greatly surround lighting, thereby has low total (that is, minute surface adds diffusion) reflectivity, and combines mat surface in its output one side, thereby has low direct reflection.This embodiment according to the present invention, optical thin film 500 has low minute surface and diffuse reflectance, thereby shows the information with hard contrast.
Preferably, substrate 510 has high light transmission.Substrate can be transparent or diffusion.Substrate itself is available, for example, in the body and/or surface diffusion come diffused light.Can be by making the coarse surface diffusion that obtains of surperficial 510A.Substrate 510 can be soft or hard, and can have pigment and make color the best of leaving the light of optical thin film 500 towards observer 550.Substrate 510 can be any be light transmissive suitable material basically.Be particularly suitable for comprising tygon terephthalate (PET), polycarbonate, acrylic acid, glass and other similar base material as the example of base material.
Light absorbing zone 520 generally is made up of the potpourri of spreading light absorbing material on bonding agent.Specially suitable light absorbing material comprises carbon black, light absorbing dyestuff, and such as black dyes and other similar light absorbing dyestuff, and other light absorbing material.Specially suitable bonding agent example comprises thermoplastic, propionic acid alkene salt hardening with radiation or heat cured, and epoxy resin is the material of base, pressure sensitive adhesive and other similar adhesive material with the silicone.Also can comprise such as spreading agent other material of surfactant, viscosity modifier, hardening agent etc.
Globule 530 can be by any transparent and the suitable material of light height transmission made.The example of special suitable material comprises various types of glass, comprises organic glass (PMMA), polystyrene, the polymeric material of the potpourri of two or more different materials, and other similar globule material.Globule is globulate basically preferably, comprises suitable shape avette or other shape that caters to the need but can have.Become avette globule 530 to be used in the visual angle of leaving the light of optical thin film 500 such as coordination on one or several direction level or vertical or other direction.The thickness of the diameter range of globule 530 and light absorbing zone 520 is preferably selected like this, makes to greatest extent globule partly be imbedded in the thin layer 520 so that the light throughput for best, and is kept hard contrast.When the globule increasing diameter added-time, be shown to the observer information look and resemble more fine particle and lower resolution is arranged.On the other hand, if the diameter of globule 530 is too little, if then the light throughput of film 500 can reduce under the situation that keeps comprehensive contrast.Globule 530 generally has the refractive index that desirable optical property is provided, for example desirable light transmission and/or visual angle.Globule 530 can have from 1.3 to 3.5 ranges of indices of refraction, and preferably 1.3 to 2.4.The thickness of light absorbing zone can be greater than average globule radius, so that increase the durability of optical thin film 500.Change a kind of method, this thickness can be less than average globule radius, so that increase total light transmission of optical thin film 500.
Light source 501 can be a single light source or a row individual light source.Light source 501 can be pointolite or planar light source.Preferably, from light source 501 that send and incide only diffusion on the globule 530 so that the light throughput of film 500 for best.Light source 501 can be the light with collimation or the emission of diffusion form.If light source 501 is not diffusion fully, then substrate 510 can be made to diffusion fully.Change a kind of method, can be at light source 501 and input face 510
*Between put a suitable additional diffuser.
Light source 501 can show or displayed image not.The light source example of displayed image comprises LCD, light emission diode display, plasma scope, organic light emitting display device, Field Emission Display, electroluminescent display, and the display of other suitable formation image.The light source example of displayed image does not comprise blobs, light emission diode, and other suitable sources of displayed image not.If light source 501 displayed image, so, the visual angle that preferably is shown image wants big, so that the light throughput of film 500 is best, and, little in the image plane and the distance between the globule 530 of light source 501, to keep image quality and resolution.
Fig. 7 illustrates synoptic diagram according to another embodiment of the present invention.Optical module 900 is placed on light source 901 and sees on the correct position between the apparent place 950.Light incides from source 901 on the optical module 900 and towards seeing apparent place 950 and leaves this optical module.Surround lighting incides on the optical module 900 from observer's one side.Optical module comprises one or several display unit 915, substrate 910, light absorbing zone 920, a plurality of globule 930 and optional optics thin layer 940.Substrate 910 has input face 910A and output face 910B.Globule 930 is partly imbedded in the thin layer 920, and preferably is in close proximity to the face 910B of substrate, so that the comprehensive light throughput of optical module 900 is best.
According to Fig. 7, display unit 915 is placed on the correct position between the input face 910A of light source 901 and substrate 910.Change a kind of method, can be placed on globule 930 to display unit 915 or extra display unit 915 and see correct position between the apparent place 950.Display unit 915 comprises optional display layer 905 and shows chart 906.Display layer 905 has input face 905A and output face 905B.Show that chart 906 is formed on surperficial 905A and/or the surperficial 905B.Three displayed map like this are shown in Fig. 8,9 and 10.Fig. 8 is illustrated in the left arrow indication 1011 on the background 1013 and the front schematic view of right arrow indication 1012.Fig. 9 is illustrated in the alpha-numerical establishment 1121 and the front schematic view of indicating 1123 on the background 1122.Figure 10 is illustrated in the battery indication 1231 on the background 1232.Be shown in Fig. 8,9 and 10 chart can be to adopt the part display of the instrument assembly of the display that shows chart at automobile, aircraft, ship or any other.
With reference to figure 7, can adopt a kind of bonding agent that display unit 915 is laminated to substrate 910 again such as pressure sensitive adhesive.Change a kind of method, available mechanical means, ultra-sonic welded, or its suitable method is attached to substrate 910 to display unit 915.Change a kind of method, can be showing that chart is formed on the input face 910A of substrate 910.Change a kind of method, can be showing that chart is formed on the surface of globule 930.Available as printing, the method for photoetching, or other suitable method forms the demonstration chart.About the characteristics that show chart can be transparent, dye people's color, translucent or opaque.
Show that thin layer 905 can be soft or rigidity.Show that thin layer 905 can be any suitable material of transmitted light basically.The example of suitable material comprises tygon terephthalate (PET), polycarbonate, acrylic acid, glass and other suitable base material.
Optics thin layer 940 preferably can preferable plated film compatibly to the exposed region of globule 930 and the thin layer of the height transmitted light on the light absorbing zone 920, plan to improve the combination property of optical thin film.Optics thin layer 940 can be that a kind of hard coating is to improve the durability of optical thin film 900.Optics thin layer 940 can be the comprehensive light throughput of a kind of antireflection coating with raising optical thin film 900, and reduces the integrated reflectance of optical thin film 900 simultaneously from observer's one side.Optics thin layer 940 also can have the visual angle that light diffusion character is further controlled the light that leaves this optical thin film.Optics thin layer 940 also can comprise pigment.
Although the present invention is described with reference to various embodiment, should in no way limit detail specifications in the above in embodiment.Would rather say that this attempt is the present invention who thinks to cover fully as stipulating in appending claims.
Claims (92)
1, a kind of optical system that is used for display message is characterized in that, this optical system comprises:
Light source; And
Optical thin film, have towards input one side and the sight of described light source and look a side, wherein, described optical thin film to described input one side of described optical thin film from described light source incident and leave total light transmission of light that the described sight of described optical thin film looks a side in the situation under the diffusion incident light greater than the situation of collimation under the incident light.
2, optical system according to claim 1 is characterized in that, wherein is incident on the described optical thin film and from the light that light source sends and passes through described optical thin film by transmission, and described light by transmission has the visual angle less than the half-cone angle of described incident light.
3, optical system according to claim 1 is characterized in that, the described sight of leaving described optical thin film is looked a side and the visual angle of the light that sends from described light source, is different in level with vertical direction.
4, optical system according to claim 1 is characterized in that, described optical thin film to total light transmission of the diffusion incident light that sends from described light source greater than 20%.
5, optical system according to claim 1 is characterized in that, described optical thin film to total light transmission of the diffusion incident light that sends from described light source greater than 40%.
6, optical system according to claim 1 is characterized in that, described optical thin film is looked total the light reflectivity of collimated light of a side less than 10% to the described sight of inciding described optical thin film.
7, optical system according to claim 1 is characterized in that, described optical thin film is looked total the light reflectivity of collimated light of a side less than 5% to the described sight of inciding described optical thin film.
8, optical system according to claim 1 is characterized in that, sends from described light source, incides the only diffusion of described input one side of described optical thin film.
9, optical system according to claim 1 is characterized in that, sends from described light source, incide described optical thin film described input one side only the collimation.
10, a kind of optical system to observer's display message is characterized in that, this optical system comprises:
Light source; And
Optical thin film has towards input one side of described light source with in output one side on input one side opposite, is configured between described light source and the observer, and this optical thin film comprises,
Light absorbing zone, and
A plurality of transparent bead that partly are embedded in the described light absorbing zone, the inlet part of described globule is in input one side of described optical thin film, like this, the part light that receives from described light source by input one side of described optical thin film through described globule towards observer's transmission.
11, optical system according to claim 10 is characterized in that, described light source is diffusion.
12, optical system according to claim 10 is characterized in that, described light source collimates.
13, optical system according to claim 10 is characterized in that, described light source sends, incides only diffusion on the described optical thin film.
14, optical system according to claim 10 is characterized in that, described light source send, incide on the described optical thin film only the collimation.
15, optical system according to claim 10 is characterized in that, described light source displayed image.
16, optical system according to claim 15 is characterized in that, described light source comprises LCD.
17, optical system according to claim 15 is characterized in that, described light source comprises light emitting display device.
18, optical system according to claim 15 is characterized in that, described light source comprises organic light emitting display device.
19, optical system according to claim 15 is characterized in that, described light source comprises plasma scope.
20, optical system according to claim 10 is characterized in that, also is included between described light absorbing zone and the described light source, is configured in the substrate that described optical thin film is imported the transmitted light of a side.
21, optical system according to claim 20 is characterized in that, described substrate has pigment.
22, optical system according to claim 20 is characterized in that, described substrate comprises light diffuser.
23, optical system according to claim 20 is characterized in that, described light absorbing zone is applied in the substrate of described transmitted light.
24, optical system according to claim 10 is characterized in that, described light absorbing zone is included in a kind of light absorbing dyestuff or the pigment in the bonding agent.
25, optical system according to claim 10 is characterized in that, described globule is spherical basically.
26, optical system according to claim 10 is characterized in that, described globule has asymmetrical profile.
27, optical system according to claim 10 is characterized in that, described globule be dye coloured.
28, optical system according to claim 10 is characterized in that, described globule has from 1.3 to 3.5 ranges of indices of refraction.
29, optical system according to claim 10 is characterized in that, described globule is partly outstanding by described light absorbing zone.
30, optical system according to claim 29 is characterized in that, also is included between light absorbing zone and the light source, is configured in the substrate that described optical thin film is imported the transmitted light of a side.
31, optical system according to claim 10 is characterized in that, described globule comprises the globule of one or more types, and the type of every kind of described globule has different refractive indexes.
32, optical system according to claim 10 is characterized in that, also is included in output one side of described optical thin film, is configured in the thin layer of transmitted light at least one surface in the exposed surface of described globule and the described light absorbing zone.
33, optical system according to claim 32 is characterized in that, the thin layer of described transmitted light comprises hard coat film.
34, optical system according to claim 32 is characterized in that, described light-transmitting layer comprises anti-reflection layer.
35, optical system according to claim 32 is characterized in that, described light-transmitting layer comprises the mat surface coating.
36, optical system according to claim 10, it is characterized in that, the light that incides on the described optical thin film and send from described light source is through described optical thin film transmission and to leave output one side of described optical thin film less than the visual angle of the half-cone angle of incident light.
37, optical system according to claim 10 is characterized in that, leaves that described optical thin film is exported a side and the visual angle of the light that sends from described light source, is inequality in level with vertical direction.
38, a kind of optical system to observer's display message is characterized in that, this optical system comprises:
Light source; And
Optical thin film is suitable for being configured between described light source and the described observer, and this optical thin film comprises,
Have the substrate that is used for receiving input one side and output one side of light from described light source,
Light absorbing zone has input one side and output one side, is disposed at output one side of described substrate, and input one side of described light absorbing zone is to output one side of described substrate, and
The globule of a plurality of transmitted lights is partly imbedded in the described light absorbing zone, a side of reserving described globule is exposed on output one side of this light absorbing zone, wherein from described light source, incide part light that described substrate imports a side through described optical thin film by described globule transmission, see by the observer and to look.
39, according to the described optical system of claim 38, it is characterized in that, also comprise demonstration thin layer with input face and output face, and being configured in the described input face of described demonstration thin layer and the demonstration chart at least one face in the described output face, this demonstration thin layer is suitable for being configured between light source and the observer.
According to the described optical system of claim 39, it is characterized in that 40, described demonstration thin layer is optically transparent.
According to the described optical system of claim 39, it is characterized in that 41, described demonstration thin layer has from 10 to 500 microns thickness.
According to the described optical system of claim 39, it is characterized in that 42, described demonstration thin layer and described demonstration chart are configured in the described substrate.
According to the described optical system of claim 39, it is characterized in that 43, in described demonstration thin layer and the described demonstration chart one is configured at least one and the described light absorbing zone in the expose portion of described globule.
According to the described optical system of claim 39, it is characterized in that 44, one in described demonstration thin layer and the described demonstration chart is in turn laminated to described substrate.
According to the described optical system of claim 39, it is characterized in that 45, in described demonstration thin layer and the described demonstration chart one is in turn laminated at least one and the described light absorbing zone in the expose portion of described globule.
According to the described optical system of claim 39, it is characterized in that 46, one in described demonstration thin layer and the described demonstration chart is discontinuous.
According to the described optical system of claim 39, it is characterized in that 47, described demonstration chart is translucent in presumptive area.
According to the described optical system of claim 39, it is characterized in that 48, described demonstration chart is transparent in presumptive area.
49, according to the described optical system of claim 39, it is characterized in that, described demonstration chart in presumptive area be dye coloured.
According to the described optical system of claim 39, it is characterized in that 50, described demonstration chart is opaque in presumptive area.
According to the described optical system of claim 39, it is characterized in that 51, described chart comprises at least a in alpha-numerical establishment, image and the mark.
52, according to the described optical system of claim 38, it is characterized in that, also comprise the demonstration chart that is suitable for being configured between described light source and the observer.
According to the described optical system of claim 52, it is characterized in that 53, this demonstration chart is printed at least one at least one expose portion and described light absorbing zone in the described globule.
According to the described optical system of claim 52, it is characterized in that 54, this demonstration chart is printed on described input one side and at least one side in described output one side of described substrate.
According to the described optical system of claim 52, it is characterized in that 55, described demonstration chart is translucent in presumptive area.
According to the described optical system of claim 52, it is characterized in that 56, described demonstration chart is transparent in presumptive area.
57, according to the described optical system of claim 52, it is characterized in that, described demonstration chart in presumptive area be dye coloured.
According to the described optical system of claim 52, it is characterized in that 58, described demonstration chart is opaque in presumptive area.
According to the described optical system of claim 52, it is characterized in that 59, described displayed image comprises alpha-numerical establishment, at least a in image and the mark.
According to the described optical system of claim 38, it is characterized in that 60, this light absorbing zone is included in a kind of light absorbing dyestuff or pigment in the bonding agent.
According to the described optical system of claim 38, it is characterized in that 61, the partly outstanding light absorbing zone of described globule enters described substrate.
According to the described optical system of claim 38, it is characterized in that 62, described globule is spherical basically.
According to the described optical system of claim 38, it is characterized in that 63, described globule has asymmetrical profile.
According to the described optical system of claim 38, it is characterized in that 64, this globule has pigment.
According to the described optical system of claim 38, it is characterized in that 65, this globule has from 1.3 to 3.5 ranges of indices of refraction.
66, according to the described optical system of claim 38, it is characterized in that, also comprise the light-transmitting layer at least one and the described light absorbing zone in the expose portion that is configured in described globule.
According to the described optical system of claim 66, it is characterized in that 67, described light-transmitting layer comprises hard coat film.
According to the described optical system of claim 66, it is characterized in that 68, described light-transmitting layer comprises anti-reflecting layer.
According to the described optical system of claim 66, it is characterized in that 69, described light-transmitting layer comprises the mat surface coating.
70, according to the described optical system of claim 38, it is characterized in that, also comprise the rotatable pointer that is suitable for being configured between described light source and the described sight apparent place.
According to the described optical system of claim 70, it is characterized in that 71, described pointer is configured between input one side of described light source and described substrate.
According to the described optical system of claim 70, it is characterized in that 72, described pointer is suitable for being configured between described globule and the observer.
73, according to the described optical system of claim 70, it is characterized in that described pointer light conducting.
According to the described optical system of claim 70, it is characterized in that 74, described pointer is translucent.
According to the described optical system of claim 70, it is characterized in that 75, described pointer is to throw light on by the light source except described light source.
76, a kind of method to observer's displayed image is characterized in that, this method comprises following step:
The transmittance substrate is provided, it has input side and has the outgoing side of the light absorbing zone that is configured in described substrate outgoing side, and this light absorbing zone has light transmissive, partly is embedded in a plurality of globules wherein, like this, the part of globule is exposed on light absorbing zone one side on this substrate opposite; And
Illuminate the input side of substrate with light source, make that be that this globule is towards observer's transmission then through this substrate to part light.
77, according to the described method of claim 76, it is characterized in that, also be included in the step of configuration light-transmitting layer at least one and the described light absorbing zone in the expose portion of described globule, this light-transmitting layer comprises at least one layer in hard coat film and the anti-reflection layer.
78, according to the described method of claim 76, it is characterized in that, also be included in the step of configuration demonstration chart between described light source and the observer.
79, according to the described method of claim 78, it is characterized in that, also be included in the step of configuration light-transmitting layer on the described demonstration chart.
80, a kind of instrument assembly is used for seeing and looking this instrument assembly seeing the apparent place display message, and base is characterised in that this instrument assembly comprises:
Substrate has and is used to receive from the input side of the light of light source with towards the outgoing side of described sight apparent place;
Light absorbing zone has and is configured in described suprabasil input side and outgoing side, and the input side of described light absorbing zone is towards the outgoing side of described substrate; And
A plurality of to the globule of transmission only, partly imbedded in the described light absorbing zone, a part reserving described globule is exposed to described sight apparent place, and wherein the part light that is received by described substrate input side from described light source passes through described globule towards the transmission of described sight apparent place.
81,0 described instrument assembly according to Claim 8 is characterized in that, also comprises the demonstration chart that is configured between described light source and the described sight apparent place.
82,1 described instrument assembly according to Claim 8 is characterized in that, also comprises the light-transmitting layer that is configured on the described demonstration chart.
83,0 described instrument assembly according to Claim 8 is characterized in that, also comprises the expose portion that is configured in described globule and the light-transmitting layer on the described light absorbing zone.
84,0 described instrument assembly according to Claim 8 is characterized in that described light source is diffusion.
85,0 described instrument assembly according to Claim 8 is characterized in that described light source displayed image.
86,0 described instrument assembly according to Claim 8 is characterized in that, the only diffusion of inciding on the described light absorbing zone input side and sending from described light source.
87,0 described instrument assembly according to Claim 8 is characterized in that, also comprises the rotating pointer that is configured between described light source and the described sight apparent place.
88,0 described instrument assembly according to Claim 8 is characterized in that described globule has 1.3 to 3.5 ranges of indices of refraction.
89, a kind of optical thin film that is used for display system is characterized in that, this optical thin film comprises:
Substrate has the input side and the outgoing side that are used for receiving from light source light;
Light absorbing zone has input side and the outgoing side that is configured in described substrate outgoing side, and the input side of described light absorbing zone is in the face of the outgoing side of described substrate;
A plurality of to the globule of transmission only, partly imbedded in the described light absorbing zone, reserved a part that is exposed to the described globule of seeing apparent place; And
Show chart, be configured at least a at least a portion in described substrate and the described globule that wherein the part light that receives from described substrate input side is had an X-rayed towards described sight apparent place through described globule.
90,9 described optical thin films according to Claim 8 is characterized in that described demonstration chart is printed on the described globule.
91,9 described optical thin films according to Claim 8 is characterized in that described demonstration chart is printed in the described substrate.
92,9 described optical thin films according to Claim 8 is characterized in that described demonstration chart is in turn laminated in the described substrate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US846701A | 2001-11-09 | 2001-11-09 | |
| US10/008,467 | 2001-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1592857A true CN1592857A (en) | 2005-03-09 |
Family
ID=21731761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02822147 Pending CN1592857A (en) | 2001-11-09 | 2002-09-18 | Optical film with high contrast |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1444537A2 (en) |
| JP (1) | JP2005509894A (en) |
| CN (1) | CN1592857A (en) |
| AU (1) | AU2002331871A1 (en) |
| TW (1) | TW591246B (en) |
| WO (1) | WO2003042725A2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7248406B2 (en) | 2004-10-15 | 2007-07-24 | Hewlett-Packard Development Company, L.P. | Projection screen |
| DE102006000993B4 (en) * | 2006-01-05 | 2010-12-02 | Merck Patent Gmbh | OLEDs with increased light output |
| KR20080099080A (en) * | 2007-05-08 | 2008-11-12 | 삼성에스디아이 주식회사 | Filter and plasma display device having same |
| US8405895B2 (en) | 2007-11-26 | 2013-03-26 | 3M Innovative Properties Company | Optical system with high contrast |
| US8000006B2 (en) * | 2009-07-02 | 2011-08-16 | Morgan Adhesives Company | Rear-projection screen |
| JP2011150327A (en) * | 2009-12-25 | 2011-08-04 | Dainippon Printing Co Ltd | Optical sheet and display device provided with optical sheet |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2539491Y2 (en) * | 1991-10-09 | 1997-06-25 | 惠和商工株式会社 | Light diffusion sheet material |
| EP0627638A1 (en) * | 1993-06-02 | 1994-12-07 | Hughes Aircraft Company | Elliptical diffuser |
| US6344263B1 (en) * | 1998-03-30 | 2002-02-05 | 3M Innovative Properties Company | Light dispersing film and method of manufacture |
| JP3822361B2 (en) * | 1998-07-10 | 2006-09-20 | 株式会社日立製作所 | Light distribution control element and display device including the same |
| US6278546B1 (en) * | 1999-04-01 | 2001-08-21 | Honeywell International Inc. | Display screen and method of manufacture therefor |
| JP2001281420A (en) * | 2000-03-29 | 2001-10-10 | Fuji Photo Film Co Ltd | Light diffusing body and method for use of the same |
-
2002
- 2002-09-18 JP JP2003544502A patent/JP2005509894A/en active Pending
- 2002-09-18 WO PCT/US2002/029580 patent/WO2003042725A2/en not_active Application Discontinuation
- 2002-09-18 EP EP02768865A patent/EP1444537A2/en not_active Withdrawn
- 2002-09-18 AU AU2002331871A patent/AU2002331871A1/en not_active Abandoned
- 2002-09-18 CN CN 02822147 patent/CN1592857A/en active Pending
- 2002-10-16 TW TW91123826A patent/TW591246B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003042725A3 (en) | 2004-02-12 |
| WO2003042725A2 (en) | 2003-05-22 |
| TW591246B (en) | 2004-06-11 |
| EP1444537A2 (en) | 2004-08-11 |
| AU2002331871A1 (en) | 2003-05-26 |
| JP2005509894A (en) | 2005-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6866393B2 (en) | Reflective liquid crystal display | |
| JP4133420B2 (en) | Backlight and liquid crystal display device | |
| CN2687708Y (en) | Liquid crystal display device and electronic apparatus | |
| WO2015046439A1 (en) | Prism sheet, area light source device, image source unit, and liquid crystal display device | |
| CN101310198B (en) | Multi-function enhancement film | |
| KR100306885B1 (en) | Illumination panel and display device using the same | |
| CN101430072B (en) | An Assembled Uniform Surface Light Source | |
| JP2004062099A (en) | Visibility improving sheet, display using the same and a transmission type projection screen | |
| CN101630067A (en) | Display | |
| CN101535878A (en) | Back-lit displays with high illumination uniformity | |
| CN101535880A (en) | Back-lit displays with high illumination uniformity | |
| JPWO2010032801A1 (en) | Optical sheet and image display device | |
| CN214335425U (en) | Prevent leading light source display module assembly of blue light | |
| CN1576901A (en) | Light diffusing agent, light diffusing sheet, and nonglare sheet | |
| KR20020073404A (en) | Optical film and liquid-crystal display device | |
| US20010009474A1 (en) | Optical path changing polarizer | |
| KR100479191B1 (en) | Semi-transmissive liquid crystal display device | |
| JP2003315560A (en) | Light transmission body, surface light source device using the same, and liquid crystal display device | |
| CN1592857A (en) | Optical film with high contrast | |
| CN1431544A (en) | Liquid crystal display | |
| CN113156707B (en) | Surface light source device and flat panel display device | |
| CN1836178A (en) | Backlight device | |
| KR101752245B1 (en) | Light Diffusing Sheet for Back Light Unit | |
| JP2015180952A (en) | Prism sheet, surface light source device, video source unit, and liquid crystal display device | |
| WO2020066312A1 (en) | Light-guide laminate using anisotropic optical film, and planar illumination device for display device using same |
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 |