CN101349858B

CN101349858B - Screen

Info

Publication number: CN101349858B
Application number: CN2008101333302A
Authority: CN
Inventors: 真保晃; 新藤裕幸
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2007-07-20
Filing date: 2008-07-18
Publication date: 2010-12-08
Anticipated expiration: 2028-07-18
Also published as: JP2009048169A; JP4479832B2; CN101349858A

Abstract

The invention provides a front gain reduction suppressed, bright screen, which also improves contrast of projection image in bright rooms with external light from above exited or the like. On the front side of screen substrate as reflection surface, surface of each projection portion is formed in shape of hemisphere with terminal portion by overlap of a plurality of projection portions in x axis direction. Consequently, projection light from projection apparatus or the like is more reflected to front side of the screen on viewer's side, so that front gain reduction is capable to be suppressed, and the screen turns to be bright. On the other hand, image projection with great contrast is realized due to that groups is spaced with a predetermined interval on the y direction.

Description

Screen

Technical field

The present invention relates to the projected light from the projection arrangements such as projector in the place ahead is reflected and show out the screen of projected image.

Technical background

For example, the screen that can watch as making the projected image reflection that forms by oblique projection from the below, thus known have by the shape portion of unit of a plurality of convexs of the same shape of 2 dimension systematicness ground configurations on the screen substrate and only the surface portion of downside form reflecting surface interdict from above outer light become the screen (with reference to patent documentation 1) of high-contrast.

[patent documentation 1] spy opens the 2006-215162 communique

; surface portion at the downside of the unit shape that only is being formed at the convex on the screen substrate forms under the situation of reflecting surface; if projected light wide-angle ground is reflected,, can not fully obtain being directed to the light quantity of specific direction though then field angle broadens in screen surface.For example, make the wide result of field angle, the light quantity of direction that is directed to the beholder place of screen becomes not enough, thereby might become the low and dark screen of positive gain.And, in bright room etc., because the influence of illumination light etc. also might suppress the contrast reduction of projected image fully.

Summary of the invention

So, the object of the present invention is to provide the bright of the reduction that suppressed positive gain and can exist from above the such bright room of outer light etc. in the screen of improvement of contrast of realization projected image.

In order to address the above problem, the 1st screen of the present invention (a) possesses a plurality of three-dimensional portions that are disposed at the concave shape of the face side on the screen substrate; (b) three-dimensional portion, number with the three-dimensional portion that is provided with in scope along the predetermined length of the 1st direction on the screen substrate, than disposing in the mode of Duo along the number of the scope setting of the predetermined length of the 2nd direction of intersecting with the 1st direction, wherein the 1st direction is that the either party at least of direction with the chief ray principal direction that reaches outer light is definite accordingly; (c) a plurality of three-dimensional portions, with at least 2 three-dimensional portions among the three-dimensional portion of the scope setting of the predetermined length of the 1st direction mutually in succession modes arrange.

The 2nd screen of the present invention (a) possesses a plurality of three-dimensional portions that are disposed at the convex form of the face side on the screen substrate; (b) three-dimensional portion, number with the three-dimensional portion that is provided with in scope along the predetermined length of the 1st direction on the screen substrate, than disposing in the mode of Duo along the number of the scope setting of the predetermined length of the 2nd direction of intersecting with the 1st direction, wherein the 1st direction is that the either party at least of direction with the chief ray principal direction that reaches outer light is definite accordingly; (c) arrange in succession mode mutually at least 2 three-dimensional portions among the three-dimensional portion of the scope setting of the predetermined length of the 1st direction.

In the above-mentioned the 1st and the 2nd screen, so-called three-dimensional portion can be the jut outstanding from the surface of screen substrate, from the surperficial recessed recess of screen substrate any.Solid portion is not limited to be delimited by sphere and other curved surface, but comprises by a part having the shape that the surface on plane delimited.And, chief ray, though be the situation that incides the light beam in the zone of being had in mind on the screen as what consider, usually, relevant with the light beam of middle section on inciding screen, but also can be relevant with the light beam of desired region on inciding screen or Zone Full.Configuration about a plurality of three-dimensional portions, so-called number in the three-dimensional portion that the scope along the predetermined length of the 1st direction is provided with, than many, be meant that the rate that occupies of three-dimensional portion of the 1st direction or density are than the 2nd direction height in number along the scope setting of the predetermined length of the 2nd direction of intersecting with the 1st direction.Also have, do not having the par between the three-dimensional portion of adjacency on the 2nd direction but three-dimensional portion in succession configuration each other on the 1st and the 2nd direction both sides if the rate that occupies of the three-dimensional portion of the 1st direction or density than the 2nd direction height, then also can adopt.

In above-mentioned screen, a plurality of three-dimensional portions form the row along the 1st direction on the screen substrate, and this is listed in multiple row is set on the 2nd direction of intersecting with the 1st direction arrangement.And then along in the same row of the row of the 1st direction, at least 2 three-dimensional portions arrange in succession mode mutually.And, at this moment, three-dimensional portion, with along the number of the three-dimensional portion of the scope setting of the predetermined length of the 1st direction than disposing in the mode of Duoing along the number of the scope setting of the length of being scheduled to of the 2nd direction of intersecting with the 1st direction.Thus, for example, can make from the projected light of projection arrangement more to the place ahead reflection as the screen of beholder's side, thereby can suppress the reduction of positive gain, become bright, wherein the chief ray of this projection arrangement is in the direction of inclination with respect to screen in perpendicular to the plane of the 1st direction.And, for example can suppress from outer light, the especially incident angle of the direction different than of the reflection of the little outer light of chief ray, thereby, also can realize the improvement of contrast even in bright room, use to the front with the direction of the chief ray of above-mentioned projected light.

And as concrete mode of the present invention, at least a portion of a plurality of three-dimensional portions is by the group that overlaps to form interconnection of basic configuration.Thus, can make more light to the beholder's lateral reflection that is positioned at screen the place ahead.At this, so-called basic configuration is meant three-dimensional shapes such as hemisphere, semiellipse ball, and arranges in overlapping mode by the profile of overlooking that makes them, forms the group of jut or recess near each other and continuous.

And, as concrete mode of the present invention, at least a portion of a plurality of three-dimensional portions, with along three-dimensional portion adjacent in the same row of the 1st direction each other in succession mode arrange.Thus, can access the field angle of wide region.

And, as concrete mode of the present invention, at least a portion of a plurality of three-dimensional portions, spaced-apart predetermined space on the 2nd direction.Like this, by separating predetermined space, can between the three-dimensional portion on the 2nd direction, guarantee the par, thereby for example in perpendicular to the plane of the 1st direction, be under the situation of direction of inclination with respect to screen cover at chief ray, the projection reflection of light is too reduced, and suppress from the reflection to the place ahead of screen of the outer light of the direction beyond it contrast to be improved.

And as concrete mode of the present invention, the 1st direction is perpendicular to the direction of the cross spider of the face of chief ray of projected light and screen cover.Thus, become and structure from the corresponding screen of projecting direction of the projected light of projection arrangements such as projector.

And as concrete mode of the present invention, the 1st direction is a horizontal direction.Thus, for example can make projected light reflection forwards effectively, and prevent to reflect to face side by the outer light that forms from the illumination light of top etc. from the below projection.

And as concrete mode of the present invention, the 2nd direction is a vertical direction.Thus, in projected light for example from the vertical lower projection, light can improve contrast effectively under the situation of vertical direction irradiation outside the illumination light etc. on the other hand.

And as concrete mode of the present invention, the 1st direction is vertically intersected with the 2nd direction.Thus, for example, from below produce from the projected light of projection arrangement and from above produce outer light such as illumination light produce so the other way around projected light with outside under the situation of light, can carry out efficiently becoming clear and the high image projection of contrast.

And,,, between a plurality of three-dimensional portions, the par can be set in the screen substrate side as concrete mode of the present invention.In this case, for example a plurality of three-dimensional portions have light reflection surface and light absorption face, and the border of light reflection surface and light absorption face is along the 1st direction, and the par has the absorption surface of light.Thus, because this light reflection surface reflective projection light suitably, and meanwhile, the absorption surface of the light of the light absorption face of a plurality of three-dimensional portions and par suitably absorbs unwanted lights such as outer light, so contrast is improved.

And as concrete mode of the present invention, a plurality of three-dimensional portions have light absorption face at the periphery of light reflection surface.Thus, unwanted light such as light outside the periphery of light reflection surface also can suitably absorb.

Description of drawings

Fig. 1 (a)～(c) is the figure that schematically shows the screen of the 1st embodiment;

Fig. 2 is the sectional side view that the part of the screen of the 1st embodiment has been amplified;

Fig. 3 (a) and (b) are curve maps that the characteristic for screen describes;

Fig. 4 (a)～(e) is the figure of the position relation of the adjacent jut of explanation;

Fig. 5 (a)～(c) is the figure that other examples for screen describe;

Fig. 6 is the figure that other examples for screen describe;

Fig. 7 is the figure that other examples for screen describe;

Fig. 8 is for the synoptic diagram at the projection of screen that is formed by projector; And

Fig. 9 (a)～(c) is the figure of the screen of explanation variation.

The explanation of symbol

10... screen, 1... screen substrate, 2a... jut, 2... group, 3... par, RS... light reflection surface, AS... light absorption face, 100... projector, 200... lighting device.

Embodiment

Below, describe for screen with reference to accompanying drawing as one embodiment of the present invention.Fig. 1 (a)～(c) is the figure that schematically shows the screen of present embodiment.Fig. 1 (a) is the front elevation of screen; Fig. 1 (b) is a Y-Y side sectional view; Fig. 1 (c) is the X-X top plan view.Screen 10 is the projected light PL that makes from the not shown projection arrangement that is arranged at screen front side below etc., the reflection type screen that reflects as reflected light RL to the front side of screen 10 more.The screen 10 of present embodiment possesses: screen substrate 1 with on screen substrate 1 by the link to each other group (set of protrusions) 2 of the multiple row that forms of a plurality of jut 2a.Screen substrate 1 is exposed the surface portion in the appearance side, as between a plurality of jut 2a, be the par 3 between the group 2 of multiple row and playing a role.

Shown in Fig. 1 (a), be formed at a plurality of jut 2a of the front face side on the screen substrate 1 respectively, as a plurality of three-dimensional portions, have roughly hemispheric profile.These a plurality of jut 2a, along the i.e. row of x direction among the figure of the horizontal direction on the screen substrate 1, arrange in the mode that multiple row promptly is set on the y direction among the figure in vertical direction.1 row are the groups 2 that are linked to be row with the state that jut 2a adjacent on the x direction forms in succession by overlapping mode each other.That is to say that each jut 2a is a basic configuration with hemisphere, arrange that the result forms the group 2 of interconnection in the mode that the circle as the profile of overlooking of this hemisphere overlaps each other on the x direction.Thereby when dissect the section shape of group 2 time on the x direction, a plurality of circular arcs that make that become shown in Fig. 1 (c) link up form trapezoidal.On the other hand, as can be known from Fig. 1 (b) etc., a plurality of groups 2, in vertical direction promptly among the figure on the y direction, spaced-apart and periodically configuration, thus between a plurality of jut 2a, be formed with par 3.

As previously mentioned, in face side as the reflecting surface of screen 10, on the x direction, by a plurality of jut 2a in succession in overlapping mode, and the shape that the surface that becomes each jut 2a has been omitted at the both ends about the x direction of hemisphere, thus, can make projected light PL, reflect as reflected light RL to the place ahead of screen more from projection arrangement that is arranged at screen 10 front lower places etc.Thereby, can suppress the reduction of positive gain, thereby become bright.And, about the y direction because the spaced-apart predetermined space of jut 2a, so can guarantee on the y direction par 3 occupy the zone, and, can realize the raising of the contrast of appropriateness by blocking outer light from the front upper place of screen 10.

Under the situation of the screen 10 shown in Fig. 1 (a)～(c), on screen substrate 1, with the equitant horizontal direction of jut 2a is that the x direction is the 1st direction, with the vertical direction of vertically intersecting with the 1st direction is that the y direction is the 2nd direction, formed specific arrangement, described later, the occupy rate of jut 2a on all directions that this specific arrangement has been considered.This 1st and the 2nd direction, be with on the screen 10 to have zone (particularly, the middle section on the screen 10) in mind be benchmark, determine according to the main direction of outer light such as the direction of the chief ray XL of projected light PL or illumination light.

At this, the rate that occupies of so-called jut 2a refers to represent the index of jut 2a about the shared ratio of the orientation on the screen substrate 1, means the number of the three-dimensional shape that every orientation unit length (predetermined length) forms.If describe with regard to present embodiment, then what is called occupies rate, become on the 1st direction or the 2nd direction, become in the section of maximum position at the width of the section of jut 2a, the width of the section of jut 2a occupies the ratio of the effective coverage of the image on the screen substrate 1.For example, on the 2nd direction (y direction) of vertically extending, become in Y-Y side section section, shown in Fig. 1 (b) of maximum position at width as the section of the jut 2a on the 2nd direction, the width LPY sum of the section of each jut 2a is with respect to the ratio that occupies of the length L SY of the effective coverage of the image on the screen substrate 1, and is the rate that occupies on the screen substrate 1 of a plurality of jut 2a on the 2nd direction.Similarly, on the 1st direction (x direction) of flatly extending, become in X-X side section section, shown in Fig. 1 (c) of maximum position at width as the section of the jut 2a on the 1st direction, the width LPX sum of the section of each jut 2a is the rate that occupies of a plurality of jut 2a on the 1st direction with respect to the ratio that occupies of the length L SX of the effective coverage of the image on the screen substrate 1.

Under the situation of the screen 10 shown in Fig. 1 (a)～(c), a plurality of jut 2a as mentioned above, become gapless state with overlapping mode phase adjoining land configuration on the 1st direction, on the other hand, and configuration separatedly on the 2nd direction.Thereby, the rate that occupies of a plurality of jut 2a on the 1st direction of level, than a plurality of jut 2a on the 2nd vertical direction to occupy rate big.That is to say that a plurality of jut 2a are with the intensive state configuration of ratio the 2nd direction on the 1st direction.And, particularly, in the configuration shown in Fig. 1 (a)～(c), because become on the 1st direction a plurality of jut 2a with below near the radius of basic configuration overlapping mode state in succession, so shown in Fig. 1 (c) etc., become the shape that has dispensed the surface of reflecting in two lateral ends of hemisphere.Thus,, for example can make projected light PL, reflect to the place ahead lateral direction that as the place ahead center direction (being the forward of z direction) of beholder's side is not screen 10 more from the below though the back is described in detail.And, because the central point of a plurality of jut 2a is disposed on the grid point, at this moment, the rate that occupies by making the 2nd direction than the 1st direction to occupy rate little, particularly on the 2nd direction, separate, guarantee the zone that occupies of par 3, so even under bright illumination, also can realize the improvement of contrast.

Below, explanation carry out at projection arrangements (not shown) such as utilizing projector under the situation of image projection from the direction of the chief ray XL of the projected light PL of projection arrangement and in image projection, become the relation of direction of light and screen 10 outside the unwanted illumination light etc., and thus, describe in more detail about the characteristic of above-mentioned screen 10.In indoor use-pattern, projection arrangement is arranged at the i.e. below of floor side at general projection arrangements such as projector, carries out projection towards the top from the below.On the other hand, be arranged at the ceiling side, so situation is that outer light such as illumination light throws light on from the top to indoor mostly because illuminate indoor lighting apparatus etc.In the present embodiment, be general environment for use corresponding to such screen 10, be pre-formed the example under the situation of reflecting surface of screen 10.Thereby, in the present embodiment, shown in Fig. 1 (a), 1 (b), carry out the oblique prerequisite that is projected as upward with below from screen 10, incide the chief ray XL of the middle section of being had in mind among the screen 10, the normal with respect to extending from the center of screen 10 tilts to oblique below.In this case, shown in Fig. 1 (b), the x direction becomes the 1st direction, this x direction be the cross spider of face PS vertical and the screen cover SS on the screen substrate 1 with the chief ray XL of projected light PL direction, be horizontal direction.And the principal direction of the outer light that is produced by lighting apparatus etc. is about the normal of screen cover SS and the direction of chief ray XL substantial line symmetry.

Fig. 2 is the figure of structure that is used to explain the reflecting surface of screen 10, is that Fig. 1 (b) has been carried out the figure that amplifies.A plurality of jut 2a possess light reflection surface RS and light absorption face AS respectively.Light absorption face AS for example is coated on the surface by the material with light absorption and forms.At this, as mentioned above, from the below, on the other hand, become top with the direction of chief ray XL substantial line symmetry from normal about screen S S by the principal direction of the outer light of generations such as lighting apparatus about the direction of the chief ray XL of projected light PL.Corresponding therewith, the light reflection surface RS of a plurality of jut 2a is arranged at lower side, and light absorption face AS is arranged at upper side.In other words, the border of the light reflection surface RS of jut 2a and light absorption face AS is along the 1st direction.That is to say, make should projection, reflect efficiently from the projected light XL of below, on the other hand, make should not reflect, from the outer light absorption that produces by lighting apparatus etc. of top in screen 1.At this, and then, also same about par 3 with light absorption face AS, for example be coated on the surface by material and form light absorption.Par 3 is to separate predetermined space on the 2nd direction to form in vertical direction mutually by organizing 2.Utilize this structure, 3 places in the par, the jut 2a that is positioned at its downside from the projected light of below reflects and not incident, and the outer light smaller from the incident angle of top carries out incident.Because the existence of light absorption face AS and par 3, even under bigger, bright situation such as the influence of the outer light that produces by lighting apparatus etc., outer light also reflexes to the place ahead of screen 10 hardly, thereby can carry out the projection of the image easy clear appearance of black, that contrast is high.

At this, in the making of screen 10, though the whole bag of tricks is considered in the formation about the protuberance that becomes a plurality of jut 2a, but for example, can consider by utilizing lithography process and etching and processing to make the metal pattern consistent, and use this metal pattern that starting material such as resin are carried out pressure processing, injection moulding etc. form protuberance on screen substrate 1 method with the shape of this protuberance.And, outside this, for example also can consider on screen substrate 1, to utilize ink-jetting style to form the method for lattice point in the mode that becomes predetermined reflecting surface.That is to say, consider by on the screen substrate 1 with the mode liquid droplets change that becomes predetermined lattice point starting material and make injected starting material on screen substrate 1, be solidified to form the method for protuberance.And, formation about the light reflection surface RS on a plurality of jut 2a, by at the specific region of the protuberance that forms like that as mentioned above evaporation for example as the aluminum metal of reflecting material, perhaps utilize sprayer to spray reflecting material, can be only forming light reflection surface RS with consistent and desirable zone such as projection direction of light from specific direction.In addition, in the above description, though the material of surface applied light absorption for example on par 3 and light absorption face AS, the material that also can adopt light absorption is as being used for screen substrate 1 and being equivalent to the starting material of the hemispherical portion of a plurality of jut 2a itself.

Fig. 3 (a) and (b) are the curve maps that are used to illustrate the characteristic of the screen that forms like that as mentioned above.Wherein, Fig. 3 (a) is expression as the arrangement of the jut 2a on the horizontal direction of the 1st direction in the present embodiment, is jut 2a overlapping degree and curve map with respect to the relation of the light intensity at horizontal field of view angle on the 1st direction.

About Fig. 3 (a), transverse axis is represented the horizontal field of view angle, and the longitudinal axis is represented light intensity.Each curve A 1～A4 is to represent to make the overlapping degree of the jut 2a shown in Fig. 1 (a)～(c) on the 1st direction that the curve map of the situation of variation has taken place respectively.For example, among curve A 1～A4, curve A 1 is illustrated among Fig. 1 (a), become at jut 2a non-overlapping copies adjacent on the 1st direction on the screen cover SS just mutually under in succession the situation of distance with respect to the light intensity at horizontal field of view angle.That is to say, curve A 1, a plurality of jut 2as of expression on the screen substrate 1 exist the interval that equates, the i.e. numerical value about light intensity under the situation that has the spacing that equates on the 1st direction at by repeating such pattern shown in Fig. 4 (a) a plurality of jut 2a of being arranged on the 1st direction.At this, if explain Fig. 4 (a), then in this case, the basic configuration of each jut 2a has roughly the same hemispherical, has the circular profile of overlooking, and apart from d, equal radius r 1, the r2 sum r1+r2 of 2 jut 2a as the adjacency of the distance between centers of 2 jut 2a adjacent to each other on the 1st direction, 2 jut 2a contact on screen cover SS.Promptly become d=r1+r2.In this case, because the light reflection surface RS of jut 2a exists near screen cover SS on the 1st direction, so as from the curve A 1 shown in Fig. 3 (a) as can be known, even spend the intensity that also can keep to a certain degree more than or equal to 50 about the horizontal field of view angle, have enough field angle, but 10 degree are lower with interior intensity about the horizontal field of view angle.On the other hand, about curve A 2～A4, all represent such numerical value under the situation of the pattern that the basic configuration (hemisphere) of 2 adjacent on the 1st direction jut 2a repeats to overlap each other with the spacing that equates shown in Fig. 4 (b) about light intensity.That is to say, under the situation of curve A 2～A4 of Fig. 3 (a),, promptly become d＜r1+r2 in abutting connection with all little than 2 radius sum r1+r2 apart from d.Among curve A 2～A4, under the situation of curve A 2, in abutting connection with apart from the d maximum, promptly corresponding to the overlapping degree minimum of the hemisphere of jut 2a.On the other hand, the situation of curve A 4 is represented in abutting connection with apart from d minimum, the i.e. numerical value when maximum corresponding to the overlapping degree of the hemisphere of jut 2a.

By each the curve A 1～A4 in the comparison diagram 3 (a), as can be known: the big more then field angle of overlapping degree of the basic configuration (hemisphere) of formation jut 2a is narrow more.For example curve A 4, though be to be the situation of half substantially, even under these circumstances, though field angle narrows down a little corresponding to the hemisphere of jut 2a overlapping, but before and after 40～50 degree, this can be described as sufficient field angle as common projected image about remaining.Otherwise, for example shown in curve A 1, do not having corresponding to the overlapping of the hemisphere of jut 2a under the lucky phase situation in succession, though can obtain the field angle of the degree of wide region, correspondingly the light intensity to the specific direction in the screen the place ahead at the common place of beholder has descended.Because in the curve map of Fig. 3 (a), about the light intensity of the longitudinal axis, expression return the model change value, so between each curve A 1～A4 about the difference of light intensity and not obvious, but because the angle that the wide more light of field angle is reflected is wide more, so can descend to the light intensity of specific direction.That is to say that under the situation that field angle is broadened, as specific direction, for example, about the place ahead of the residing screen of beholder of projected image, gain reduces, and as a result of, projects to the image deepening of beholder's side.With respect to this, in the present embodiment, for example, as the structure shown in Fig. 1 (a)～(c), make screen 10 become following structure: corresponding to the hemisphere overlaid of the jut 2a on the x direction, among spherical jut 2a with the 1st direction two end portions as light reflection surface RS, but make on the 1st direction of spherical jut 2a middle body as light reflection surface RS continuously.Thus, projected light PL is reflected more near the place ahead central authorities as the screen 10 of beholder's side.And, at this moment, shown in each curve A 2～A4, also can keep field angle (about each 50 about degree) as the very sufficient degree of screen picture.

Next, Fig. 3 (b) be expression jut 2a with respect to as the arrangement of the vertical direction of the 2nd direction of present embodiment, be the degree that on the 2nd direction, separates of jut 2a with as the relation of the gain of the index of light intensity and with the curve map of the relation of contrast.Below, at this, about all disposing of the adjacent whole jut 2a of the 2nd direction with the spacing that equates in abutting connection with distance, thereby, to determining that by the value of determining this spacing the situation in abutting connection with distance of jut 2a describes.

In Fig. 3 (b), transverse axis represents that jut 2a is with respect to the y direction of principal axis spacing (centre distance between the jut 2a of adjacency on the y direction of principal axis) as the vertical direction of the 2nd direction among Fig. 1 (a)～(c).That is to say that the value of transverse axis becomes the degree that separates with the jut 2a shown in Fig. 1 (a)～(c) and is worth accordingly on the 2nd direction.And, among each curve B 1, B2, the gain of curve B 1 expression light, curve B 2 expression contrasts.In addition, in this contrast, be illustrated in the value under the illumination of illumination 100 luxs.

Screen shown in Fig. 3 (b) all is the curve map under the situation of semi-spherical shape of radius 0.8mm for whole jut 2a.

About the transverse axis of Fig. 3 (b), when the value of y direction of principal axis spacing is 0.16mm, shown in Fig. 4 (c), be formed in basic configuration (hemisphere) non-overlapping copies of the jut 2a of adjacency on the 2nd direction, but become lucky phase distance in succession on screen cover SS.That is to say that in this case, the adjacency of value that is equivalent to y direction of principal axis spacing is apart from d, the radius sum r1+r2 that equals corresponding to the hemisphere of 2 adjacent jut 2a is d=r1+r2.Under the value of the y direction of principal axis spacing situation bigger, shown in Fig. 4 (d), become d＞r1+r2 than 0.16mm.Along with the value of y direction of principal axis spacing becomes big than 0.16mm, as in abutting connection with also becoming big with the partition distance e that contacts apart from 2 jut 2a difference, adjacent of r1+r2 apart from d.As can be known according to the curve B 1 of Fig. 3 (b), B2, though the value of the big more contrast of value of y direction of principal axis spacing raises more, represent that the gain of light intensity but descends, there is compromise relation in the two.That is to say, though because the partition distance e of the jut 2a of Fig. 4 (d) is big more, the ratio of light absorbing par 3 is high more in the effective coverage of the image on screen substrate 1, thereby rise so suppress the reflection contrast of outer light to the place ahead of screen 10, become the eye-catching image of black, but because the ratio step-down of the light reflection surface RS of jut 2a in the effective coverage of the image on screen substrate 1, so becoming, projected light PL is difficult to the place ahead of screen 10 reflection, thereby as the whole deepening of projected image.Thereby, under the situation of Fig. 3 (b), for example, be about 0.4mm by the value that makes y direction of principal axis spacing, both kept the lightness of certain degree, the image of high-contrast is formed.

Under the situation of the example shown in the present embodiment, if the basic configuration of whole jut 2a is the semi-spherical shape of radius 0.8mm, then pass through about horizontal direction x, with Fig. 4 (b) thus shown in adjacency become contact apart from d and make hemisphere overlaid formation group 2 corresponding to jut 2a apart from the state about half of r1+r2, about vertical direction y, the value that makes y direction of principal axis spacing is about 0.40mm, a plurality of jut 2a can be formed the arrangement of best state.

In addition, though in the above description, the basic configuration of the jut 2a among the figure all is roughly the same hemispherical, and the basic configuration of jut 2a is may not size necessarily identical, for example shown in Fig. 4 (e), radius r 1 separately, r2 is also harmless is mutually different size.And, about the profile of basic configuration, also needn't one be decided to be hemispherically, as long as can make, also can be semiellipse ball and other shape.And the quantity about jut 2a is arranged also can suit to determine.For example, in Fig. 1 (a), though 9 identical shaped jut 2a are forming on the straight line that is parallel to the 1st direction and at 1

group

2,3 row on the 2nd direction that become a row ground configuration with the adjacent contacted mode of jut 2a on the screen cover SS abreast with its center configuration separately, this is the arrangement that schematically shows the jut 2a on the screen substrate 1.The present invention is not limited to this, also can be formed 1 group 2 by the jut 2a of greater number.And, at this moment, about organizing 2 the number of permutations, also can with the effective coverage of image on the screen 10 etc. accordingly, greater number ground arranges.

Fig. 5 (a)～(c) is the variation of the screen 10 of present embodiment.For example, shown in Fig. 5 (a), corresponding to the basic configuration of jut 2a also can with on the 1st direction of flatly extending, 1 list not overlapping but mutually on screen cover SS mutually in succession mode arrange.And, shown in Fig. 5 (b), also can be following configuration: respectively organizing 2 with its center configuration separately on the straight line that is parallel to the 1st direction and corresponding to what the overlapping mode in the end of basic configuration on the 1st direction of adjacent jut 2a became a row ground configuration by a plurality of jut 2a, multiple row side by side on the 2nd direction, and stagger on the 1st direction of the adjacent level that is listed in and differently be configured mutually, not only guarantee par 3 but also more thickly arrange jut 2a.And shown in Fig. 5 (c), the center separately of a plurality of jut 2a in yet can same group 2 is not configured on the straight line that is parallel to the 1st direction, forms bulk but respectively organize 2, and this bulk constitutes the row that extend along the 1st direction.Also have, in this case, by about the 2nd vertical direction, (especially between the upper and lower) has the zone that separates predetermined space between the group 2 of each bulk, and contrast is improved.

Fig. 6 is the sectional view of the variation of the screen 10 shown in key diagram 1,2 etc.In this case, in surperficial recessed mode, be formed with a plurality of recess 52a of shape, as three-dimensional portion with depression from screen substrate 10.Each recess 52a, the surface becomes hemispherical.Recess 52a as a whole, with the same pattern of Fig. 1 (a) 2 dimensions be arranged on the x direction and y direction as the 1st direction as the 2nd direction.That is to say,, thereby constitute same group mutually in succession,, thereby spaced-apartly constitute different groups about the recess 52a of y direction adjacency about the recess 52a of x direction adjacency.In each recess 52a, relative thereby light reflection surface RS is arranged at upper side with projected light from downside, relative thereby light absorption face AS is arranged at lower side with outer light from upside.The periphery up and down of recess 52a becomes par 3, absorbs outer light etc.

Under the situation of screen shown in Figure 6, the recess 52a of upside is darker relatively, and the recess 52a of downside is more shallow relatively.Its result, become big upside at the chief ray of projected light PL with respect to the incident angle of screen substrate 1, the angle of bend of the light that is produced by recess 52a becomes big, the downside that diminishes with respect to the incident angle of screen substrate 1 at the chief ray of projected light PL, the angle of bend of the light that is produced by recess 52a diminishes.Thus, in the zone up and down of screen, projected light can both be reflected effectively to frontal.

In addition, about screen shown in Figure 2, also can be higher relatively by the jut 2a that makes upside, make the jut 2a of downside relatively low, and, projected light can both be reflected effectively to frontal in the zone up and down of screen.

If the manufacturing for screen shown in Figure 6 describes, then for example, make the metal pattern consistent, and use this metal pattern to make starting material moulding such as thermoplastic resin, ray hardening resin, perhaps the starting material of sheets such as resin are implemented pressurization processing with the shape of recess 52a.Thus, can on screen substrate 1, form a plurality of concave surfaces corresponding by the Pareto diagram with expectation with recess 52a.And, the light reflection surface RS on the recess 52a, by at the specific region of the concave surface that forms like that as mentioned above evaporation for example as the aluminum metal of reflecting material, perhaps utilize sprayer to spray reflecting material and form from specific direction.Also have, in this embodiment, screen substrate 1 possesses: should form the main part 1a of recess 52a and the base part 1b of support body part 1a.Base part 1b is a purpose reinforce to wait, and is attached at the rear side of the main part 1a after being formed with recess 52a by moulding etc.

Fig. 7 is the front view (FV) of the variation of the screen 10 shown in key diagram 1 grade.In this case, form protruding circular-arc group 2 at upside, clamping is by center upwardly extending Z-axis VX left and right symmetrically setting in y side of screen 10.And then group 2 is arranged with a plurality of on y direction up and down concurrently.Each organizes jut 62a adjacent in 2 mutually in succession, and the group 2 of adjacency is spaced-apart.The circular arc that each organizes 2 forms concentric circles.

Form under the circular-arc situation will organizing 2 as mentioned above, the directions that group 2 is extended become vertically with respect to the chief ray of the projected light of the each point that incides screen 10.

Though under the situation of screen shown in Figure 7 10, make a plurality of groups 2 to be configured to concentric shape, both a plurality of groups 2 of the same shape of curvature unanimity can be arranged on the y direction, also each can be organized 2 and circular-arcly be divided into a plurality of with identical.And, must not use jut 62a formation group 2, and can constitute with recess 52a as shown in Figure 6.And then, can make the group 2 of convex mix existence with the group 2 of matrix, also can in single group 2, make jut 62a mix existence with recess 52a.Particularly, for example also jut 62a and recess 52a alternately can be configured on the x direction.

Fig. 8 is the screen 10 of the present embodiment under the situation of projector has been adopted in expression as projection arrangement the figure that makes use-case.In Fig. 8, projector 100 possesses: projector's main body 50, projecting lens 20 and catoptron RM.Also have, each mechanism of projector 100 places in housing SC.Also have, at this, the environment that is provided with as screen 10 and projector 100 is set to: utilize to be suspended to indoor lighting device 200 and to carry out the illumination that formed by the outer light OL from the top, projector 100 carries out projection from the below of screen 10.

By the formed image light of the control in projector 50, penetrate from projecting lens 20, and then, penetrate as projected light PL from projector 100 with the state that has been endowed desired angle by the reflection on catoptron RM.Thereby, in this case, projector 100, the chief ray XL that carries out projected light PL with respect to the normal slope of screen 10 oblique projection.The projected light PL of projection on screen 10 reflected by each jut 2 as mentioned above.At this moment, as mentioned above, because the surface of screen 10 constitutes corresponding to the projection angle of projected light PL, so the image of institute's projection becomes image reduction, bright that has suppressed positive gain.And then, because on screen 10, absorbed, so even indoor etc. what utilize that outer bright position ground throws light on, contrast also is improved by suitable from the outer light OL of top.

In addition, the present invention is not limited to above-mentioned embodiment, but can implement under variety of way in the scope that does not break away from its purport, for example distortion that also can be achieved as follows.

Though in the screen 10 of above-mentioned embodiment, the 1st direction setting is for horizontal direction x, the present invention is not limited to this.Though for example in the above-described embodiment, consider the environment for use of general projection arrangement etc., about the direction of the chief ray XL of projected light PL from the below, thereby correspondingly the 1st direction becomes horizontal direction therewith, but under the situation beyond below projected light PL is, therewith correspondingly, the 1st direction of screen also can be different.That is to say, for example, under the situation of carrying out from the side of screen from the projection of projector, can be vertical direction with the 1st direction setting also.And, for example, also can not be the direction of only considering about the chief ray XL of projected light PL, but will combine definite the 1st direction about the direction of the chief ray XL of projected light PL and the principal direction both sides of outer light.For example, outside the projection from projector is side, illumination light etc. from screen light from above situation under, also the 1st direction setting can be middle direction (directions of 45 degree that for example tilt).

And, though in the screen 10 of above-mentioned embodiment, three-dimensional portions such as the jut 62a of formation group 2, recess 52a are have hemispheric curved surface concavo-convex, and are hemispheric concavo-convex but three-dimensional portion of the present invention is not limited to, but also can be set to comprise polyhedral concavo-convex on plane.

And, though in the screen 10 of above-mentioned embodiment, in each group 2, a plurality of jut 2a in overlapping mode mutually in succession on the x direction, on the y direction, dispose for a plurality of groups 2 spaced-apartly, and between a plurality of groups 2, be formed with par 3, but the par needn't necessarily be set.That is to say, as long as the rate that occupies of jut 2a, recess 52a etc. is high on the x direction than on the y direction, then also can be no par 3 and whole phase configurations in succession each other such as jut 2a, recess 52a.

Below, specifically describe the variation that in the screen 10 shown in Fig. 1,2 etc., dispenses par 3.Fig. 9 (a), 9 (b) and 9 (c) are respectively front elevation, side sectional view and the top plan view of explanation variation.In this case, on the y direction, seamlessly be close to for upwardly extending a plurality of groups 2, do not have the such par 3 of the situation shown in Fig. 1 (a)～1 (c) in x side.But, the width LPY ' of the section of each the jut 2a in the section of Y-Y side, the width LPX than X-X overlooks the section of each the jut 2a in the section sets for example greatly about 2 times.That is to say, number (density) 1/LPX corresponding to the jut 2a of the per unit length on the 1st direction of x direction, ratio is big fully corresponding to number (density) 1/LPX ' of the jut 2a of the per unit length on the 2nd direction of y direction, thereby the projected light from the below is reflected effectively to the place ahead of screen 10, can suppress the reduction of positive gain, make display image become bright.

In above variation, also can replace jut 2a, and utilization recess 52a formation group 2 as shown in Figure 6 is whole or a part of.

And, can make 2 types of jut 2a, the recess 52a etc. of the different shape that constitutes above-mentioned embodiment or arrangement or above at random the combination and constitute screen 10.

Claims

1. reflection type screen possesses:

A plurality of three-dimensional portions that are disposed at the concave shape of the face side on the screen substrate;

Wherein, aforementioned three-dimensional portion, number with the aforementioned three-dimensional portion that is provided with in scope along the unit length of the 1st direction on the aforementioned screen substrate, than disposing in the mode of Duo along the number of the scope setting of the aforementioned unit length of the 2nd direction of intersecting with aforementioned the 1st direction, wherein aforementioned the 1st direction is that the either party at least of the principal direction that reaches outer light of the direction with the chief ray of projected light is definite accordingly;

Aforementioned a plurality of three-dimensional portion, with at least 2 three-dimensional portions among the aforementioned three-dimensional portion of the scope setting of the aforementioned unit length of aforementioned the 1st direction mutually in succession modes arrange;

Aforementioned a plurality of three-dimensional portion is the surperficial recessed roughly hemispheric recess from aforementioned screen substrate;

Aforementioned a plurality of three-dimensional portion has light reflection surface and light absorption face, and the border of aforementioned lights reflecting surface and aforementioned lights absorption surface is along aforementioned the 1st direction.

2. reflection type screen possesses:

A plurality of three-dimensional portions that are disposed at the convex form of the face side on the screen substrate;

Arrange in succession mode mutually at least 2 three-dimensional portions among the aforementioned three-dimensional portion of the scope setting of the aforementioned unit length of aforementioned the 1st direction;

Aforementioned a plurality of three-dimensional portion is from the outstanding roughly hemispheric jut in the surface of aforementioned screen substrate;

3. reflection type screen according to claim 1 and 2, wherein:

At least a portion of aforementioned a plurality of three-dimensional portions is by the group that overlaps to form interconnection of basic configuration.

4. reflection type screen according to claim 1 and 2, wherein:

Aforementioned a plurality of three-dimensional portion, with along three-dimensional portion adjacent in the same row of aforementioned the 1st direction each other in succession mode arrange.

5. reflection type screen according to claim 1 and 2, wherein:

At least a portion of aforementioned a plurality of three-dimensional portions, spaced-apart predetermined space on aforementioned the 2nd direction.

6. reflection type screen according to claim 1 and 2, wherein:

Aforementioned the 1st direction is perpendicular to the direction of the cross spider of the face of chief ray of aforementioned projected light and screen cover.

7. reflection type screen according to claim 1 and 2, wherein:

Aforementioned the 1st direction is a horizontal direction.

8. reflection type screen according to claim 1 and 2, wherein:

Aforementioned the 2nd direction is a vertical direction.

9. reflection type screen according to claim 1 and 2, wherein:

Aforementioned the 1st direction is vertically intersected with aforementioned the 2nd direction.

10. reflection type screen according to claim 1 and 2, wherein:

In the face side of aforementioned screen substrate, between aforementioned a plurality of three-dimensional portions, the par is set;

Aforementioned par has light absorption face.

11. reflection type screen according to claim 1 and 2, wherein:

Aforementioned a plurality of three-dimensional portion has the aforementioned lights absorption surface at the periphery of aforementioned lights reflecting surface.