CN102012617A - Forward projection screen capable of shielding ambient light and production method thereof - Google Patents
Forward projection screen capable of shielding ambient light and production method thereof Download PDFInfo
- Publication number
- CN102012617A CN102012617A CN 200910168782 CN200910168782A CN102012617A CN 102012617 A CN102012617 A CN 102012617A CN 200910168782 CN200910168782 CN 200910168782 CN 200910168782 A CN200910168782 A CN 200910168782A CN 102012617 A CN102012617 A CN 102012617A
- Authority
- CN
- China
- Prior art keywords
- micro lens
- array
- lens array
- type micro
- aperture
- 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
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention provides a forward projection screen capable of effectively shielding ambient light with high gain and high contrast, by adopting two groups of microlens arrays and two aperture arrays. The forward projection screen further has the characteristics of high uniformity and high color saturation without glare and moire fringes. The invention further provides a method for producing the screen, and particularly provides a method for forming required aperture arrays by utilizing the microlens arrays per se.
Description
Technical field
The present invention relates to orthographic projection screen and manufacture method thereof, relate in particular to the maskable surround lighting, have orthographic projection screen and the manufacture method thereof of high brightness and high-contrast.
Background technology
Forward projection can obtain required large-screen image from very little projector image, and the image size that goes out of projection is unrestricted in principle.Yet along with the increase of projected image, be dispersed to become with size in the area that quadratic relationship increases, cause brightness of image sharply to descend from the luminous energy of projector.In addition, because the influence of surround lighting, the contrast of image also can reduce greatly.
The simple luminous energy output that increases projector can improve the brightness of projected image, but can require the power output of projection lamp to increase, and brings the life problems of heat dissipation problem and projection lamp thereupon, and the volume of projector and electric power consumption also can increase.The luminous energy output that improves projector can not effectively solve strong surround lighting influences problem to the contrast of projected image.
As shown in Figure 1, common white screen (101) is based on lambert's scattering, to be distributed to all directions of the preceding hemisphere of screen from the luminous energy of projector (102), wherein many is unwanted, as direction (103) up, down direction (104), towards left to (105), towards right (106), and useful direction is only in a watch window (108) at screen the place ahead spectators' eyes (107) place, and the width of its horizontal direction (109) is usually greater than the width of vertical direction (110).
From seeing as Fig. 1, the surround lighting of any direction (111) also can be at screen reflection surface, and formed light (112) arrives the observer, thereby causes the deterioration of picture contrast and color saturation.Under a lot of situations, deterioration is serious in not seeing the picture material that projector transmits clearly, has to take to reduce surround lighting or increase the way that projector light power is exported, to increase the contrast of image.Yet under a lot of situations, the interference of surround lighting can't be reduced to needed degree.
Setting about from the optical property of projection screen is a shortcut that solves the orthographic projection screen brightness and contrast, and prior art adopts multiple scheme to reach the purpose of improving screen intensity and contrast.Very commonly the glass microballoon screen has disperseed a large amount of small glass microballoons with traceability reflex performance on screen, and these glass microballoons have increased projected image brightness greatly with projected light reflected back projector direction.But this screen has its limitation, if projector departs from spectators place direction (as the fall situation of formula of upper hanging type or ground), the screen intensity that spectators see can reduce greatly.In addition, the angle of divergence of glass microballoon reflection be circular, has gap greatly with aforementioned level, so can not make full use of luminous energy.In addition, the gap between the glass microballoon still has the feature of lambert's scattering, can not fully suppress the influence (reducing the contrast of screen) of surround lighting.
United States Patent (USP) invention US7262912B2 provides contrast to strengthen orthographic projection screen, adopted the combination of refractive micro lens array and aperture array and catoptron, as shown in Figure 2, the light of person that has come's projector (201) focuses on the formed light in back (203) by micro lens array (202) and passes an aperture array (204), the mirror (205) that is reflected reflection, formed light (206) passes aperture array (204) once more, and micro lens array (202), the light after the outgoing (207) is gone to the observer.And component environment light can not pass the aperture array after by microlens array focus, and absorbed layer (208) absorbs, thereby has reduced the influence of surround lighting.
The problem of foregoing invention is, owing to adopted the window of identical aperture array (204) as incident and emergent light, its aperture size can not be done too for a short time, otherwise the visual angle can be subjected to very big restriction.But big aperture size makes near the light the projector also can pass through the aperture again, thereby can not effectively eliminate the influence of surround lighting.
Fig. 3 is a kind of projection screen that Chinese patent (application number 85105808) adopts two dimension reflection microlens array (301) to be invented, can realize foregoing banded reflection, promptly have the different angle of divergence (α and β) in level and vertical direction, this feature is focal power different form of reflection lenticule unit (302) in level and vertical direction; In addition, the low scattering properties of reflection lenticule unit makes that surround lighting can not scattering, and departs from watch window, has reduced the loss of contrast that surround lighting causes.Yet this kind screen has a limitation, and that is exactly that the observation band that reflects everywhere on the screen does not overlap, and this is owing to the angle difference from each point on the projected light arrival screen of projector causes.Arrive the middle place of screen (303) as the light from projector (309) among Fig. 3 b, after lenticule unit (304) reflection, form a watch window (306); And project to the light that the screen lower left is located, and after lenticule unit (305) reflection, form another watch window (307), only could see the image that lenticule unit (304) and (305) are located simultaneously at two band infalls (308).See the general image of screen as need, the observer need be in all watch window overlapping places that all each points of screen reflect to form, because all there is difference in the watch window centre position that each point reflects to form on the screen, the overlapping area can limit observer's field range much smaller than the watch window area that each lens generated.
Foregoing invention also has a limitation, though can not arrive watch window away from the light of projector, near the light the projector can arrive watch window, thereby reduces the contrast and the color saturation of image.
Summary of the invention
Based on above background, the invention provides a kind of forward projection screen, a kind of high-gain that has especially is provided, high-contrast, forward projection's screen of elimination ambient light effects, described screen also has high uniformity, free from glare, no Moire fringe, high color saturation feature.The present invention also provides the method for making of this screen, and a kind of method of utilizing micro lens array itself to form required aperture array especially is provided.
Orthographic projection screen provided by the invention, shown in Fig. 4 a, form by following structure:
1. contain a substrate (401) of two faces, form by transparent optical material;
2. an infiltration type micro lens array (402) is positioned at first of said substrate, accepts the light from projector;
3. a reflection-type micro lens array (403) is positioned at second of said substrate; Reflective projection light is to watch window (108);
4. an absorption layer (404) is between described infiltration type micro lens array and reflection-type micro lens array; Described absorption layer includes first aperture array (405) and second aperture array (406), and light can see through these two aperture arrays, and the light that incides zone (407) outside the aperture then is absorbed.
Orthographic projection screen provided by the invention, its feature are that also shown in Fig. 4 b, described absorption layer is positioned on the focal plane of infiltration type micro lens array; First aperture array (405) of absorption layer is corresponding by the focal position that the infiltration type micro lens array forms on the focal plane with projector light (408), and promptly their center overlaps, and the shape size is consistent or approaching.Usually first aperture array can be slightly larger than the focus size of projection ray, makes that in use there is certain redundance the position of projector.
Second aperture array (406) on the absorption layer is corresponding by the picture zone of said infiltration type micro lens array on the focal plane with light (409) and (410) from watch window (108) direction, the center that is them overlaps, and the shape size is consistent or approaching.Therefore, the shape of second aperture array and size depend on the shape and the size of watch window.More satisfactory watch window is a rectangle (containing square), because the observer has bigger distribution usually in watch window horizontal direction (109), and less distribution is arranged in vertical direction (110), the aperture shape of second aperture array can be taken as the rectangle that horizontal direction is long, vertical direction is narrow, can utilize luminous energy better, obtain desirable luminance gain.
The reflection-type micro lens array can be a concave, it also can be Fresnel type, metal-plated membrane or multilayered medium inteferometer coating on it, so that uniform high reflectance all to be arranged in visible-range, the projection ray that it will come from first aperture array on the absorption layer reflexes to second aperture array on the absorption layer, and focused ray.Because the aperture of second aperture array is less with respect to infiltration type or reflection-type lens unit, suitable focusing can make luminous energy all through described second aperture array.
Orthographic projection screen provided by the invention, its feature also is, as shown in Figure 5, the lenticule unit of described reflection-type micro lens array diverse location has different angles of inclination as (503) and (504) according to the angle (508) of incident projection ray is different with (509), so that reflection ray can arrive identical watch window (512) by behind second aperture array and the reflection-type micro lens array.
Arrive the center of watch window for the central ray that makes projection, can be according to the angle theta of incident angle β and the projection ray and the watch window central ray of projection ray, calculate the tilt angle rl of each unit of reflection-type micro lens array, and the optimum distance d of reflection-type micro lens array and absorption layer:
Angle condition: 2 (β-n η)=θ (1)
Locality condition: 2d β/n-2d η=p-θ f/n (2)
P is the cycle of first and second aperture array, and n is the refractive index of base material, and f is that the infiltration type micro lens array is at intrabasement focal length.Obtain:
η＝(β-θ/2)/n (3)
d＝n·p/θ-f (4)
Further, can be according to condition
2f·(θ-α)/n+2f·α/n＝p (5)
α by watch window with respect to the open angle of screen center
Obtain:
θ＝n·p/(2f) (6)
In (6) generation, obtained to (4)
d＝f (7)
So best angle of inclination is by (3) decision, and (7) show that the reflection-type micro lens array equates in intrabasement focal distance f (513) with the reflection-type micro lens array with the optimum distance d (514) of absorption layer.
Further, be maximal efficiency land productivity luminous energy, and shielding surround lighting, after projection ray's reflection of first aperture array on the reflection-type micro lens array self-absorption in the future layer, the spot size that forms on absorption layer is consistent with the aperture size of second aperture array, be that reflection ray is full of this aperture, and all pass through.
On the watch window vertical direction, the reflection-type micro lens array needs first aperture array is imaged onto between absorption layer and the infiltration type micro lens array; On the watch window horizontal direction, the reflection-type micro lens array needs first aperture array is imaged onto after the absorption layer, may extend to infinitely, decides according to the size of aperture on this direction of second aperture array;
Further, for the environment transmitted light of eliminating contiguous aperture arrives watch window, on the watch window vertical direction, the aperture width of second aperture array should be less than or equal to half of its period p.
For the situation of watch window width in the horizontal direction greater than vertical direction, there is corresponding size in the aperture of second aperture array, be the aperture in the horizontal direction width width greater than vertical direction, thereby require the reflection-type micro lens array that different focal lengths is arranged on both direction, so that reflection ray all is full of each aperture of said second aperture array.Further, the present invention also provides the reflection-type of different focal micro lens array on both direction, particularly on the watch window horizontal direction focal length greater than the reflection-type lens array of the focal length of vertical direction.
Further; can play the material of support and protective effect at one side applying one deck opposite with the projector direction with described reflection-type lenticule; as glass; metal or high molecule plastic material; or its combination; screen being played the physical support effect, and can protect the lenticular relief surface of reflection-type indeformable.
Explain the principle of work of orthographic projection screen provided by the present invention in detail below in conjunction with Fig. 5.
Projection ray arrives the zones of different of screen respectively as (501) and (513), focuses on first corresponding with focus on absorption layer aperture array (505) by infiltration type micro lens array (502), and all through it; The light that sees through from first aperture array, on the watch window vertical direction, the lens unit of reflection type micro lens array as (503) and (504) catoptric imaging to absorption layer (515) with by between the infiltration type micro lens array (502), the arrangement of distance (514) between the inclination of each unit of reflection-type micro lens array and it and the absorption layer, promptly (514) equal (513), make reflection ray all by second aperture array (506), and be full of it; The light that sees through from second aperture array passes through the infiltration type micro lens array once more, and extends to observer's window (512) Zone Full.Though the angle difference of screen is incided in projection ray, as (508) with (509 is different, but each unit of reflection-type micro lens array inclination in various degree, make the angle of emergent ray and incident ray equate that in the zones of different of screen promptly emergent ray will arrive same watch window as (510) and (511).
The light of other direction absorbs the zone (507) of absorbed layer except that first and second aperture arrays, and can not arrive watch window; Surround lighting by second aperture array also since aforementioned about screen parameter arrangement and can not arrive watch window, thereby shielded surround lighting.
The present invention also provides a kind of method for making of screen, particularly directly utilizes the infiltration type micro lens array of screen to produce the method for required absorption layer, and its step is as follows:
Form first substrate and include first and second, first substrate is transparent;
Form an infiltration type micro lens array,, and accept light towards the projector direction attached to first of first substrate; Second of the focal plane of infiltration type micro lens array and first substrate overlaps.
With one deck photosensitive material second attached to first substrate;
Exposure for the first time: place a pointolite in the projector position with respect to screen, the size of pointolite is identical with projector light source or bigger, by infiltration type micro lens array and first substrate photosensitive material is exposed, and forms first exposure area;
Exposure for the second time: place an area source in the watch window position with respect to screen, the area source size is identical with the watch window size, by infiltration type micro lens array and substrate photosensitive material is exposed, and forms second exposure area;
Photosensitive material after the exposure is peeled off from substrate, done chemical treatment, form an absorption layer, form first aperture array in first exposure area, form second aperture array second exposure area, other zones absorb light.
Further, the absorption layer that forms or its duplicate are fitted in second of described first substrate, regulate the relative position and the angle of absorption layer and first substrate, make that first aperture array on the absorption layer overlaps by the picture point array that infiltration type micro lens array and first substrate form with projector on absorption layer; Second aperture array overlaps by the picture array that infiltration type micro lens array and first substrate form on absorption layer with watch window.
Second substrate is fitted on the absorption layer, and second substrate is transparent;
Form a reflection-type micro lens array, and it is fitted in second substrate, regulate the relative position and the angle of it and second substrate, the light that makes the reflection-type micro lens array will come from first aperture array reflexes to second aperture array, and arrives watch window by the infiltration type micro lens array once more; The light that the described light that comes from first aperture array is the projector direction forms after by the infiltration type microlens array focus.
Description of drawings
The scattering situation of Fig. 1 common white screen, luminous energy is not all reflexed in the observation band
Fig. 2 prior art--a kind of orthographic projection screen of-band micro lens array and aperture array and catoptron
Fig. 3 a prior art---a kind of orthographic projection screen of reflection made with micro lens array
Fig. 3 b prior art---make a kind of orthographic projection screen of reflection with micro lens array, the observation band that forms after the reflection from lens of diverse location partially overlaps
Fig. 4 a orthographic projection screen structure provided by the invention is made up of two groups of micro lens arrays and absorption layer, contains two groups of aperture arrays on the absorption layer
Fig. 4 b orthographic projection screen provided by the invention, first aperture array is corresponding with the focus of projection ray, and second aperture array is corresponding with the picture zone of watch window on absorption layer
Fig. 5 orthographic projection screen provided by the invention, reflection-type micro lens array tilt so that light arrives watch window
The example one of Fig. 6 a orthographic projection screen provided by the invention, the pattern of two aperture arrays on its absorption layer
The example one of Fig. 6 b orthographic projection screen provided by the invention, the reflection case of its reflection-type micro lens array lens unit on the watch window vertical direction
The example one of Fig. 6 c orthographic projection screen provided by the invention, the reflection case of its reflection-type micro lens array lens unit on the watch window horizontal direction
The example two of Fig. 7 a orthographic projection screen provided by the invention, the pattern of two aperture arrays on its absorption layer
The example two of Fig. 7 b orthographic projection screen provided by the invention, the reflection case of its reflection-type micro lens array lens unit on the watch window vertical direction
The example two of Fig. 7 c orthographic projection screen provided by the invention, the reflection case of its reflection-type micro lens array lens unit on the watch window horizontal direction
The method for making example of Fig. 8 orthographic projection screen provided by the invention directly produces required aperture array with micro lens array
Embodiment
[embodiment 1]
An example of orthographic projection screen provided by the invention as shown in Figure 5 and Figure 6,
1. contain a substrate (516) of two faces, form by transparent optical material;
2. an infiltration type micro lens array (502) is positioned at first of said substrate, accepts the light from projector;
3. a reflection-type micro lens array (517) is positioned at second of said substrate; Reflective projection light is to watch window (512);
4. an absorption layer (515) is between described infiltration type micro lens array and reflection-type micro lens array; Described absorption layer includes first aperture array (505) and second aperture array (506), and light can see through these two aperture arrays, and the light that incides zone (507) outside the aperture then is absorbed.
Described absorption layer is positioned on the focal plane of infiltration type micro lens array, and promptly (513) equal the focal length of infiltration type micro lens array at base material; First aperture array (505) of absorption layer is corresponding by the focal position that the infiltration type micro lens array forms on the focal plane with projector light (508), and promptly their center overlaps.The aperture, unit of first aperture array is slightly larger than the focus size of projection ray.
Second aperture array (506) on the absorption layer is with corresponding by the picture zone of said infiltration type micro lens array on the focal plane from watch window, and promptly their center overlaps, and the shape size is consistent.
The infiltration type micro lens array is the convex lens array, and the surface is coated with one deck antireflection deielectric-coating.The reflection-type micro lens array is the concave mirror array that the surface is coated with layer of metal aluminium film, and very high reflection efficiency is arranged in visible-range.The unit of two lens arrays all is a square, the unit pattern of absorption layer is corresponding with it, it also is square, the part of 4 unit of a 4x shown in Fig. 6 a, the unit of the first aperture array is a little square opening (603), the unit of second aperture array is rectangle (601), and it goes up for the cycle half in watch window vertical direction (604), and the watch window horizontal direction equals the cycle on (605).
Reflection-type micro lens array (517) is according to the difference of position, and tilt to some extent, after projection ray's reflection of first aperture array on the layer of self-absorption in the future, the spot size that forms on absorption layer is consistent with the aperture size of second aperture array, be that reflection ray is full of this aperture (601), and all pass through.
On the watch window vertical direction, unit shown in Fig. 6 b, reflection-type micro lens array (606) will be from light (608) reflection of first aperture array (603), reflection ray (609) focuses on (607) on the infiltration type micro lens array, and by its formation emergent ray (611), and has the less angle of divergence (612);
On the watch window horizontal direction, shown in Fig. 6 c, reflection-type micro lens array (606) will be transformed into parallel beam (614) from the light (608) of first aperture array (603); Arrive on the infiltration type micro lens array (607), and form emergent ray (615), and have the bigger angle of divergence (613) by it;
[embodiment 2]
Second example of orthographic projection screen provided by the invention such as Fig. 5 and shown in Figure 7,
1. contain a substrate (516) of two faces, form by transparent optical material;
2. an infiltration type micro lens array (502) is positioned at first of said substrate, accepts the light from projector;
3. a reflection-type micro lens array (517) is positioned at second of said substrate; Reflective projection light is to watch window (512);
4. an absorption layer (515) is between described infiltration type micro lens array and reflection-type micro lens array; Described absorption layer includes first aperture array (505) and second aperture array (506), and light can see through these two aperture arrays, and the light that incides zone (507) outside the aperture then is absorbed.
Described absorption layer is positioned on the focal plane of infiltration type micro lens array, and promptly (513) equal the focal length of infiltration type micro lens array at base material; First aperture array (505) of absorption layer is corresponding by the focal position that the infiltration type micro lens array forms on the focal plane with projector light (508), and promptly their center overlaps.The aperture, unit of first aperture array equals the focus size of projection ray.
Second aperture array (506) on the absorption layer is with corresponding by the picture zone of said infiltration type micro lens array on the focal plane from watch window, and promptly their center overlaps, and the shape size is consistent.
The infiltration type micro lens array is the convex lens array, and the reflection-type micro lens array is the concave mirror array that the surface is coated with the layer of metal silverskin, can obtain very high reflection efficiency in visible-range.The unit of two lens arrays all is a square, the unit pattern of absorption layer is corresponding with it, it also is square, shown in Fig. 7 a, the unit of the first aperture array is a little square opening (703), the unit of second aperture array also is square (701), goes up to 1/3rd of the cycle in watch window vertical direction (704), and also 1/3rd of the cycle on the watch window horizontal direction (705).
Reflection-type micro lens array (517) is according to the difference of position, and tilt to some extent, after projection ray's reflection of first aperture array on the layer of self-absorption in the future, the spot size that forms on absorption layer is consistent with the aperture size of second aperture array, be that reflection ray is full of this aperture (701), and all pass through.
On the watch window vertical direction, shown in Fig. 7 b, reflection-type micro lens array (706) is with light (708) reflection of first aperture array (703), reflection ray (709) focuses between infiltration type micro lens array (707) and the absorption layer (716), and by infiltration type micro lens array formation emergent ray (711), and has the angle of divergence (712);
On the watch window horizontal direction, shown in Fig. 7 c, reflection-type micro lens array (706) is with light (708) reflection of first aperture array (703), reflection ray (714) focuses between infiltration type micro lens array (707) and the absorption layer (716), and by infiltration type micro lens array formation emergent ray (715), and has the angle of divergence (713).
Because the aperture unit of second aperture array is square, reflection-type micro lens array (706) has identical focal length on watch window vertical direction (704) and watch window horizontal direction (705), the emergent ray of formation (711) has the identical angle of divergence (712) and (713) with (715).
[embodiment 3]
An example of the method for making of orthographic projection screen provided by the invention, its step is described as follows in conjunction with Fig. 8:
Form first substrate (801) and include first and second, first substrate is transparent;
Form an infiltration type micro lens array (802),, and accept light towards the projector direction attached to first of first substrate; Second of the focal plane of infiltration type micro lens array and first substrate overlaps.
With one deck silver sensitive material (803) second attached to first substrate;
Exposure for the first time: place a pointolite (808) in projector use location with respect to screen, the size of pointolite is more bigger than projector light source, by infiltration type micro lens array and first substrate photosensitive material is exposed, form first exposure area (804);
Exposure for the second time: place an area source (808) in the watch window position with respect to screen, the area source size is identical with the watch window size, by infiltration type micro lens array and substrate photosensitive material is exposed, and forms second exposure area (805);
Silver sensitive material after the exposure is peeled off from substrate, do chemical treatment, form an absorption layer (809), form first aperture array (804) in first exposure area, form second aperture array (805) second exposure area, other zones (806) absorb light.
Further, the absorption layer that forms or its duplicate are fitted in second of described first substrate, regulate the relative position and the angle of absorption layer and first substrate, make that first aperture array on the absorption layer overlaps by the picture point array that infiltration type micro lens array and first substrate form with projector on absorption layer; Second aperture array overlaps by the picture array that infiltration type micro lens array and first substrate form on absorption layer with watch window.
Second substrate is fitted on the absorption layer, and second substrate is transparent;
Form a reflection-type micro lens array, and it is fitted in second substrate, regulate the relative position and the angle of it and second substrate, the light that makes the reflection-type micro lens array will come from first aperture array reflexes to second aperture array, and arrives watch window by the infiltration type micro lens array once more; The light that the described light that comes from first aperture array is the projector direction forms after by the infiltration type microlens array focus.
Claims (22)
1. an orthographic projection screen is characterized in that, includes:
A substrate has first and second;
Infiltration type micro lens array is positioned at first of said substrate, accepts projection ray;
Reflection-type micro lens array is positioned at second of said substrate; Reflective projection light is to watch window (108);
An absorption layer is between described infiltration type micro lens array and reflection-type micro lens array; Described absorption layer includes first aperture array and second aperture array.
2. a kind of orthographic projection screen according to claim 1 is characterized in that, described absorption layer is positioned on the focal plane of infiltration type micro lens array; First aperture array of absorption layer is corresponding by the focal position that the infiltration type micro lens array forms on the focal plane with projection ray; Second aperture array on the absorption layer is corresponding by the imaging zone of described infiltration type micro lens array on the focal plane with light from the watch window direction.
3. a kind of orthographic projection screen according to claim 2, it is characterized in that, each lens unit inclined light shaft of described reflection-type micro lens array, inclined degree depends on the angle of incident projection ray, with reflection from the projection ray of first aperture array on the absorption layer second aperture array to the absorption layer.
4. a kind of orthographic projection screen according to claim 3, described reflection-type micro lens array is concave surface micro lens array or Fresnel Lenses Array, lens surface is coated with reflectance coating, as metal film, the multilayered medium inteferometer coating.
5. a kind of orthographic projection screen according to claim 4, described metal film are aluminium film or silverskin.
6. a kind of orthographic projection screen according to claim 3, described infiltration type micro lens array is convex surface micro lens array or Fresnel Lenses Array.
7. a kind of orthographic projection screen according to claim 6, described infiltration type micro lens array surface is coated with one deck anti-reflecting layer.
8. a kind of orthographic projection screen according to claim 3 also has one deck support and protective seam, and the one side opposite with the projector direction with described reflection-type lenticule fitted.
9. a kind of orthographic projection screen according to claim 3, each aperture of described first aperture array are equal to or greater than the size of each focus that projection ray forms by the infiltration type micro lens array on the focal plane.
10. a kind of orthographic projection screen according to claim 3, each aperture of described second aperture array is a rectangle.
11. a kind of orthographic projection screen according to claim 10, each aperture of described second aperture array at the width of watch window vertical direction (110) less than the width on the horizontal direction (109).
12. a kind of orthographic projection screen according to claim 3 is characterized in that, the degree of described each lens unit inclined light shaft of reflection-type micro lens array makes the projection centre light of reflection drive in the wrong direction in this place from the direction of watch window central ray.
13. a kind of orthographic projection screen according to claim 12 is characterized in that, described reflection-type micro lens array and the distance that described absorption layer separates make the center of reflection ray pass each aperture center of second aperture array of absorption layer.
14. a kind of orthographic projection screen according to claim 13 is characterized in that, the thickness between described reflection-type micro lens array and the described absorption layer equals the thickness between first face of substrate and the absorption layer.
15. according to the described a kind of orthographic projection screen of claim 1-14, it is characterized in that, after projection ray's reflection of first aperture array on the described reflection-type micro lens array self-absorption in the future layer, the spot size that forms on absorption layer is consistent with the aperture size of second aperture array.
16. a kind of orthographic projection screen according to claim 15 is characterized in that, described reflection-type micro lens array is gone up in watch window vertical direction (110) and first aperture array on the absorption layer is imaged between first of absorption layer and the substrate.
17. a kind of orthographic projection screen according to claim 16, it is characterized in that the width of each aperture on the watch window vertical direction of second aperture array on the absorption layer is less than or equal to described absorption layer in half of cycle of this side up the first and second aperture arrays.
18. a kind of orthographic projection screen according to claim 15 is characterized in that, the reflection-type micro lens array is equal to or less than focal length on the horizontal direction (109) at the focal length on the watch window vertical direction (110).
19. a kind of orthographic projection screen according to claim 16 is characterized in that, the focal length of reflection-type micro lens array on the watch window vertical direction is equal to or less than the focal length on the horizontal direction.
20. a kind of orthographic projection screen according to claim 17 is characterized in that, the focal length of reflection-type micro lens array on the watch window vertical direction is equal to or less than the focal length on the horizontal direction.
21. the method for making of an orthographic projection screen comprises:
Form first substrate and include first and second, first substrate is transparent;
Form an infiltration type micro lens array,, and accept light towards the projector direction attached to first of first substrate; Second of the focal plane of infiltration type micro lens array and first substrate overlaps.
With one deck photosensitive material second attached to first substrate;
Exposure for the first time: place a pointolite in the projector position with respect to screen, the size of pointolite is identical with projector light source or bigger, by infiltration type micro lens array and first substrate photosensitive material is exposed, and forms first exposure area;
Exposure for the second time: place an area source in the watch window position with respect to screen, the area source size is identical with the watch window size, by infiltration type micro lens array and substrate photosensitive material is exposed, and forms second exposure area;
Photosensitive material after the exposure is peeled off from substrate, done chemical treatment, form an absorption layer, form first aperture array in first exposure area, form second aperture array second exposure area, other zones absorb light.
22. the method for making of a kind of orthographic projection screen according to claim 21 also comprises:
The absorption layer that forms or its duplicate are fitted in second of described first substrate, regulate the relative position and the angle of absorption layer and first substrate, make that first aperture array on the absorption layer overlaps by the picture point array that infiltration type micro lens array and first substrate form with projector on absorption layer; Second aperture array overlaps by the picture array that infiltration type micro lens array and first substrate form on absorption layer with watch window.
Second substrate is fitted on the absorption layer, and second substrate is transparent;
Form a reflection-type micro lens array, and it is fitted in second substrate, regulate the relative position and the angle of it and second substrate, the light that makes the reflection-type micro lens array will come from first aperture array reflexes to second aperture array, and arrives watch window by the infiltration type micro lens array once more; The light that the described light that comes from first aperture array is the projector direction forms after by the infiltration type microlens array focus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910168782 CN102012617A (en) | 2009-09-04 | 2009-09-04 | Forward projection screen capable of shielding ambient light and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910168782 CN102012617A (en) | 2009-09-04 | 2009-09-04 | Forward projection screen capable of shielding ambient light and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102012617A true CN102012617A (en) | 2011-04-13 |
Family
ID=43842828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910168782 Pending CN102012617A (en) | 2009-09-04 | 2009-09-04 | Forward projection screen capable of shielding ambient light and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102012617A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345112A (en) * | 2013-07-05 | 2013-10-09 | 中国科学院半导体研究所 | Forward-direction projector with lens and screen |
| CN106154730A (en) * | 2016-08-11 | 2016-11-23 | 杭州昌松光学有限公司 | A kind of projection screen increasing contrast and brightness and preparation method thereof |
| CN110554558A (en) * | 2018-05-31 | 2019-12-10 | 深圳光峰科技股份有限公司 | High-contrast reflecting screen |
| CN110720106A (en) * | 2019-01-22 | 2020-01-21 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| WO2020078189A1 (en) * | 2018-10-18 | 2020-04-23 | 深圳光峰科技股份有限公司 | Projection screen and processing method therefor |
| WO2020114224A1 (en) * | 2018-12-04 | 2020-06-11 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN114660884A (en) * | 2020-12-22 | 2022-06-24 | 宁波激智科技股份有限公司 | Ambient light resistant laser television screen and preparation method thereof |
| GB2607672A (en) * | 2022-03-29 | 2022-12-14 | Envisics Ltd | Display system and light control film therefor |
-
2009
- 2009-09-04 CN CN 200910168782 patent/CN102012617A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345112A (en) * | 2013-07-05 | 2013-10-09 | 中国科学院半导体研究所 | Forward-direction projector with lens and screen |
| CN106154730A (en) * | 2016-08-11 | 2016-11-23 | 杭州昌松光学有限公司 | A kind of projection screen increasing contrast and brightness and preparation method thereof |
| CN110554558A (en) * | 2018-05-31 | 2019-12-10 | 深圳光峰科技股份有限公司 | High-contrast reflecting screen |
| WO2020078189A1 (en) * | 2018-10-18 | 2020-04-23 | 深圳光峰科技股份有限公司 | Projection screen and processing method therefor |
| US11906891B2 (en) | 2018-10-18 | 2024-02-20 | Appotronics Corporation Limited | Projection screen and processing method therefor |
| WO2020114224A1 (en) * | 2018-12-04 | 2020-06-11 | 深圳光峰科技股份有限公司 | Projection screen and projection system |
| CN110720106A (en) * | 2019-01-22 | 2020-01-21 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN110720106B (en) * | 2019-01-22 | 2021-04-23 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN114660884A (en) * | 2020-12-22 | 2022-06-24 | 宁波激智科技股份有限公司 | Ambient light resistant laser television screen and preparation method thereof |
| CN114660884B (en) * | 2020-12-22 | 2024-05-14 | 宁波激智科技股份有限公司 | Environment-light-resistant laser television screen and preparation method thereof |
| GB2607672A (en) * | 2022-03-29 | 2022-12-14 | Envisics Ltd | Display system and light control film therefor |
| GB2607672B (en) * | 2022-03-29 | 2023-06-28 | Envisics Ltd | Display system and light control film therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102012617A (en) | Forward projection screen capable of shielding ambient light and production method thereof | |
| JP7196832B2 (en) | image display device | |
| CN102023471A (en) | Forward projecting screen capable of completely shielding ambient light | |
| US11906891B2 (en) | Projection screen and processing method therefor | |
| CN102243430A (en) | Forward projection screen | |
| EP3859446B1 (en) | Projection screen and projection system | |
| CN102033407A (en) | Contrast enhanced orthographic projection screen | |
| JP2008288215A (en) | Optical system for fresnel lens light, especially for spotlight or floodlight | |
| CN109973912B (en) | Double-sheet sliding type lamp optical system capable of generating water wave 3D fluctuation effect | |
| CN101363967A (en) | Projector and projection unit | |
| JP2016004268A (en) | Projection screen and manufacturing method of the same | |
| CN111033357A (en) | Head-up display | |
| JPWO2004049059A1 (en) | Transmission screen and projection display device | |
| EP3985435B1 (en) | Projection screen | |
| US7287881B2 (en) | Light deflector and rear-projection screen | |
| CN1577069A (en) | Diffuser panel for rear projection screen and such rear projection screen | |
| JPS62501584A (en) | projection screen | |
| CN109388014A (en) | Projection screen and optical projection system | |
| CN214375801U (en) | Laser anti-speckle rear projection glass curtain | |
| US7433122B2 (en) | Front-projection screen with subsurface diffusion targets | |
| JP5228171B2 (en) | Optical element | |
| CN107367897A (en) | A kind of projection screen | |
| CN217846882U (en) | Rear projection type projection screen | |
| CN217846879U (en) | Speckle-eliminating rear projection type optical screen | |
| CN219695610U (en) | High contrast anti-speckle rear projection screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Bo Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110413 |