MXPA01000525A - A light redirective display panel and a method of making a light redirective display panel - Google Patents

Abstract

An optical display panel (10) which provides improved light intensity at a viewing angle by redirecting light emitted from the viewing screen, and a method of making a light redirective display panel, are disclosed. The panel includes an inlet face (12) at one end for receiving light, and an outlet screen (16) at an opposite end for displaying the light. The inlet face is defined at one end of a transparent body, which body may be formed by a plurality of waveguides (16a), and the outlet screen is defined at an opposite end of the body. The screen includes light redirective elements (17) at the outlet screen for re-directing light emitting from the outlet screen.The method includes stacking a plurality of glass sheets, with a layer of adhesive or epoxy between each sheet, curing the adhesive to form a stack, placing the stack against a saw and cutting the stack at two opposite ends to form a wedge-shaped panel having an inlet face and an outlet face, and forming at the outlet face a plurality of light redirective elements which direct light incident on the outlet face into a controlled light cone.

Description

DEPLOYMENT PANEL THAT MODIFIES THE SPREAD OF THE LIGHT AND A METHOD TO DEVELOP A DEPLOYMENT PANEL THAT MODIFY THE PROPAGATION OF THE LIGHT CROSS REFERENCE WITH RELATED REQUESTS This application is a continuation in part of the patent application of E.U.A. with serial number 09 / 116,613, filed on July 16, 1998, and entitled "Serrated Display Panel".

AFFIRMATION REGARDING RESEARCH OR DEVELOPMENT SPONSORED BY THE GOVERNMENT This invention was made with government support under the contract number DE-AC02-98CH 10886, granted by the Energy Department of E.U.A. The government enjoys certain rights over this invention.

BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention is directed generally to a flat optical screen, and, in particular, to a display panel that modifies the propagation of light and a method for making a display panel that modifies the propagation of light.

TECHNICAL BACKGROUND In the patent of E.U.A. No. 5,381, 502, incorporated herein by reference, there is disclosed a thin optical laminate panel having a plurality of laminated optical waveguides, on which the present invention presents an improvement. It is known in the art that waveguides can be used to produce an optical panel having an entrance face and an exit face, and the waveguides in a panel can include a transparent core laminated between the opposing layers of coating having a lower refractive index. A thin display panel formed in this way can be used in various applications, such as a television screen. However, because the screen forms an angle of the face of a small acute polyhedron with the longitudinal axes of the waveguides, the light transmitted by the waveguides has a maximum intensity when viewed coaxially, and therefore displays a reduced intensity in the normal viewing direction generally perpendicular to the screen. The prior art has attempted to resolve the diminished intensity of the light on the screen by tarnishing the output ends of the waveguides defining the screen, thus blurring the displayed light. However, the tarnish of the screen may increase the intensity in an inappropriate manner, and does not solve the underlying problem of the obliquely directed light inherent in the thin panel. Therefore, there is a need for a thin display panel that has an increased light intensity on the screen, and that exhibits a modification in the propagation of light perpendicular to the screen.

BRIEF DESCRIPTION OF THE INVENTION The present invention is directed to an optical display panel that provides an improved light intensity at an angle of view by modifying the propagation of the light that is emitted from the display screen. The display panel that modifies the propagation of light includes an input face at one end for receiving light, and an emission screen at an opposite end for displaying the light. The entrance face is defined at one end of a transparent body, which body can be formed by a plurality of waveguides, and the emission screen is defined at an opposite end of the body and is arranged obliquely with respect to the entry face. The screen includes elements that modify the propagation of light in the emission screen to modify the propagation of the light that is emitted from the emission screen.

The present invention is also directed to a method for making a display panel that modifies the propagation of light. The method includes stacking a plurality of sheets of glass, each having approximately equivalent light transmission properties, with a layer of adhesive or epoxy between each sheet, curing the adhesive to form a stack, placing the stack on a saw and cutting the battery, using the saw on two opposite sides at an angle to form a wedge-shaped panel having an entrance face and an exit face, and forming on the exit face a plurality of elements that modify the propagation of light that direct the incident light on the exit face in a controlled cone of light. The present invention solves the problems that are experienced in the prior art by displaying an increased light intensity in the emission screen through the modification of the propagation of light towards a direction perpendicular to the emission screen.

BRIEF DESCRIPTION OF THE DRAWINGS For the present invention to be clearly understood and have a simple practice, the present invention will be described in conjunction with the figures below, wherein: Figure 1 is a schematic isometric view illustrating a deployment panel; Figure 2 is a schematic isometric view illustrating a horizontal and vertical cross section of a deployment panel that modifies the propagation of light; Figure 3 is a schematic side view illustrating a vertical cross section of an exemplary embodiment of the display panel modifying the light propagation of Figure 2, wherein the light propagation modification elements are a plurality of vertically adjacent grooves; Figure 4 is a side schematic view illustrating a vertical cross section of an alternative embodiment of the display panel modifying the light propagation of Figure 3; Figure 5 is a schematic isometric view illustrating a horizontal cross section of an alternative embodiment of the display panel that modifies the propagation of light; and Figure 6 is a schematic side view illustrating a vertical cross-section of the embodiment of the deployment panel that modifies the propagation of light, wherein the grooves are incorporated in an optical waveguide panel.

DETAILED DESCRIPTION OF THE INVENTION It should be understood that the figures and descriptions of the present invention have been simplified to illustrate the elements that are important for a clear understanding of the present invention, even if other, different elements found in an embodiment have been eliminated for purposes of clarity. typical optical display panel. Those skilled in the art will recognize that other elements are desirable and / or required to implement the present invention. However, because such elements are already known in the art, and because they do not facilitate a better understanding of the present invention, an analysis of such elements is not provided herein. Figure 1 is an isometric schematic view illustrating a deployment panel 10. The deployment panel 10 includes an entrance face 12 for receiving light 14, and an exit face 16 located opposite the entrance face 12 for deploying the light 14. The input side 12 and the output side 16 may be formed by a plurality of waveguides 16a, wherein one end of each waveguide 16a forms an input for such a waveguide, and wherein the end opposite of each waveguide 16a forms an output for such waveguide 16a. Each waveguide 16a extends horizontally and the plurality of stacked waveguides 16a extend vertically. The light 14 can be displayed in the form of a video image 14a, without being limited thereto. The focusing length of the panel 10 may increase from the exit face 16 to the rear part 19 where the panel 10 has a wedge shape, which may result in an image 14a having a slightly reduced resolution. A panel 10 having a reduced resolution can be used in alternative applications, instead of applications for screens for video presentation. For example, panel 10 can be used as an illuminated button whose screen requires a simple image communicated with the display. Figure 2 is an isometric schematic view illustrating a horizontal and vertical cross section of a deployment panel that modifies the propagation of light 10. The optical display panel that modifies light propagation 10 may include a plurality of light guides. optic wave stacked 16a, and includes an exit face 16 at one end of the body 18 and an entrance face 12 at the opposite end of the body 18, a light generator 21, and at least one element that modifies the propagation of the light 17 connected to the outlet face 16. The body 18 is preferably solid, and may be homogeneous, and receives light 14 over the entire surface of the inlet face 12. The light 14 passes through the body 18 after entering the inlet face 12. In a preferred embodiment of the invention, the body 18 is formed of the length, height and width of the plurality of stacked waveguides 16a. The plurality of stacked waveguides 16a can, in a preferred embodiment of the present invention, form the body 18 of the panel 10, and can form at one end of the stack 16a the entrance face 12 and at an opposite end the face of outlet 16. The waveguides 16a may be formed of any material known in the art that is suitable for passing electromagnetic waves through them, for example, without being limited to, plastic, plexiglass, or glass. The preferred embodiment of the present invention is instrumented using individual glass sheets, which is approximately 0.0101 cm thick, and which can have a maneuverable length and width. The plurality of stacked waveguides 16a can be formed by first placing a first sheet of glass in a channel with a size slightly larger than the first sheet of glass. The channel can then be filled with an epoxy of thermal cure. The epoxy is preferably black in color, to form a black layer between the waveguides, thereby providing an improved display contrast. The term "black" is used herein to include not only the pure black color, additionally, any functionally comparable dark color suitable for use in the present invention, such as dark blue. In addition, the epoxy must possess the properties of a suitable coating layer, for example having a lower refractive index than the glass sheets to allow a substantially total internal reflection of the light 14 within the glass sheet. After filling the channel, the glass sheets are stacked repeatedly, and an epoxy layer is formed between each glass sheet. The sheets are preferably stacked at a slight angle, but the angle should be less than 90 degrees. The stack is preferably repeated until they have been stacked between about 600 to 800 sheets. Then a uniform pressure can be applied to the stack, thus causing the epoxy to flow at a generally uniform level between the glass sheets. In a preferred embodiment of the present invention, the uniform level obtained is approximately 0.0050 cm between the glass sheets. The stack can then be baked to be cured at 80 ° C for the time necessary to cure the epoxy, and then the stack is allowed to cool slowly to avoid breaking the glass. After curing, the stack can be placed against a saw, such as, but not limited to, a circular saw with diamond-shaped teeth, and cut on the two opposite sides at an angle to form a wedge-shaped panel 10 having a wedge-like shape. entrance face 12 and an exit face 16. The cutting portions of the panel 10 can then be polished with a diamond polisher to remove any mark from the saw. In an alternative embodiment of the present invention, the glass sheets preferably have a width ranging between 1.27 cm and 2.54 cm, and have a length that can be easily maneuvered, for example 30.48 cm. The sheets are stacked but not necessarily stacked at an angle, with a layer of black UV adhesive placed between each sheet. Ultraviolet radiation is then used to cure each layer of adhesive, and then the stack can be cut and / or polished. The outlet face 16 can be formed by the plurality of optical waveguides 16a stacked. The outlet face 16 is at one end of the body 18, and is disposed obliquely with the entry face 12. The entry face 12 is generally defined as the lower part of the body 18, and the exit face 16 is defined as the front part of the body 18. The outlet face 16 may be generally perpendicular to the entrance face 12, formed a triangular wedge having an acute angle A of the face between the entrance face 16 of the body 18 and the rear end 19 of the body 18. The acute angle A of the face can be in a range of 1 to 10 degrees, and preferably it is about 5 degrees, with the deployment panel modifying the propagation of the light 10 by increasing its thickness from a minimum in the upper part of the body 18, to a maximum thickness in the lower part of the body 18. The maximum thickness You can select as small as possible its handling in a given application. The display panel modifying the propagation of the light 10 has a height from the top to the bottom of the outlet face 16, and a width from left to right of the exit face 16. The width and height can be selected to produce relationships with respect to width at height of 4: 3 or 16: 9, for example, for use in a typical television application. In an exemplary embodiment of the present invention, a maximum thickness in a range of about 8 to 10 cm may be chosen, together with a height of 100 cm and a width of 133 cm. The light generator 21 generates light 14 and passes light to the input face 12. The light generator can include a light source 22, a light modulator 24, and image forming optics 26, as shown in figure 1. The light 14 can be generated initially by the light source 22. The light source 22 can be, for example, a bright incandescent lamp, a laser, an LED, or an electric arc. The light 14 from the source 22 can then be modulated through the modulator 24 to define individual image elements, known in the art as pixels. The modulator 24 may have a shape known in the art, for example a liquid crystal display (LCD), a digital micromirror device (DMD), a frame scanner, a vector scanner, an EDF, or a CRT. The image forming optics 26 may include mirrors or lenses that bend the light. The image forming optics 26 are typically aligned between the input face 12 and the light modulator 24 to compress or expand and focus the light 14 as necessary to adjust the input face 12. The light 14, after entering the the entrance face 12 travels through the body 18 of the panel towards the exit face 16. The light 14 is projected from the image forming optics 26 onto the entrance face 12, thus generally directed vertically upwards for a projection from the exit face 16. The at least one element that modifies the propagation of the light 17 is connected to the exit face 16 to modify the propagation of the light 14, which is incident in a generally vertical direction upwards from the entrance face 12 towards a direction perpendicular to the exit face 16. The light propagation modification element 17 can be, without being limited to, a groove, a plurality of grooves, a holographic coating, a lens or a series of lenses, in microlens or a series of microlenses, or a Fresnel prism. The element that modifies the propagation of the light 17 may be connected to the outlet face 16 by some suitable manner known in the art, wherein the adaptive capacity is subject to the type of element that modifies the propagation of the light that is used in a given application. Some suitable connections may be, for example, epoxy, rubber, or a transparent double-sided adhesive tape. In an alternative embodiment of the present invention, the element that modifies the propagation of the light 17 may be formed as a portion of the entrance face 16, as explained above. Figure 3 is a schematic side view illustrating a vertical cross section of an exemplary embodiment of the deployment panel 10 modifying the light propagation of Figure 2, wherein the light propagation modification elements 17 are a plurality of striations 17 adjacent vertically. The splines 17 are specifically configured to modify the propagation of the incident light 14 in a generally upward direction in the deployment panel 18 towards a direction generally perpendicular to the exit face 16., thereby increasing the intensity of the light at the outlet face 16. The grooves 17 can be, but are not limited to, a generally vertical triangular or serrated cross section. In one embodiment of the present invention, the grooves 17 are made at the end of the plurality of waveguides 16a on the outlet face 16. The groove is made using a milling machine. The router can be similar to a dovetail cutter, but it can have a curved cutting surface instead of a straight one. A plastic POD is attached to the milling machine and then the milling machine is programmed, using methods known in the art, to cut a plurality of grooves of grooves that will match the outlet face 16 in an embodiment of the present invention, groove grooves. show a coincidence of at least one flute 17 in each waveguide 16a. A coincidence of more than one groove 17 per waveguide 16a allows the angular alignment of the groove 17 with respect to the waveguide 16a so that it does not become critical. In an alternative embodiment of the present invention, a single master grid of flutes is formed to match a standard output face 16, then a replica of said master grid is made from the master grid mold. Each replicated grid, having in itself a plurality of grooves 17, is then secured to an outlet face 16. The grooves 17 preferably extend along the full width of the outlet face 16 and are separated at predetermined intervals vertically to along the height of the outlet face to receive and modify the direction of propagation of the respective portions of the lumen 14 from the entrance face 12. The flutes 17 can be straight and continuous in the horizontal direction across the width of the outlet face 16. Each of the grooves 17 can include a first transparent facet 28, said first facet can be optically aligned with the body 18 to transmit or emit the light 14 from there, and a second facet polished to reflect the light from a first opposite facet of one of the adjacent 17 splines. In one embodiment of the present invention, the polishing of the second facet 30 is formed by attaching a thin sheet to the slots forming each second facet 30, where the thin sheet is used as a backing for the adhesive. The thin sheet can be placed by hand, or by any method known in the art. In a second embodiment of the present invention, the polishing is formed by methods known in the art for plastic coating with materials having a high degree of reflection, such as chromium and silver. Each of the second facets 30 is inclined substantially vertically upwards and outwards from the height of the outlet face, and is generally obliquely aligned with a first cooperating facet 28 of an adjacent spline 17. The light traveling towards above 14 is then emitted from each of the first facets 28 and reflected obliquely from the next second adjacent facet 30 immediately from there. The reflection nature of the second facet 30 necessarily blocks the transmission of the light 14 towards the first facet 28 of the same groove 17. The transparent nature of the first facet 28 allows the light 14 to leave the body 18 and be reflected from the portion of the second facet 30 correspondingly disposed therefrom. The portion of the light 14 reflected by each of the second facets 30 forms a vertical viewing cone that diverges outwardly from the screen with a cone angle that is controlled by the specific contour and angle of the second facets 30. The orientation The angle of the second facet 30 of the spline 17 is coordinated with the transmission axes of the light 14 within the body 18. In a mode wherein the splines 17 are knurled as previously discussed, the grooving device is rigged before milling to ensure proper alignment of the grooves 17 with the outlet face 16 and light transmission shafts 14. Where several grooves 17 are present for each of a plurality of guides 16a, an angular alignment of the individual grooves 17 is not important. In cases where only one spline 17 is present for each of the plurality of waveguides 16a, the angular alignment is very important to avoid blocking the transmission of the light 14 along the axis of the transmission. The light 14 nominally intercepts the exit face 16 at the anterior angle A, and therefore the second facet 30 is preferably inclined vertically from the exit face 16 to allow a reflection of the light 14 perpendicular outward from the face outlet 16. In this way, the first facet 28 deviates from the second adjacent facet 30 at a propagation angle C, thus allowing a reflection without obstruction of the light 14 from the second facet 30. The vertical contour of the second facet 30 may be selected in conjunction with the propagation angle C to produce the desired vertical display cone B. The angle C is a matter of choosing a design as a function of B, and the angle C can vary by controlling the milling procedure as discussed above. Therefore, in a preferred embodiment of the present invention the second facets 30 are arched vertically, as concave and convex, thus allowing a more even vertical distribution of the light reflected therefrom. In alternative embodiments of the present invention, the second facet 30 may have a flat shape, although such shape reduces the vertical viewing cone. The suitable angle and shape in the second facet 30 can be calculated to direct the light 14 towards the display, once the alignment of the display is known with respect to the path of the light 14. The cone of light directed towards the display can then be be controlled with great precision, providing control even at one end where if the display is moved in some way, the display will not receive light 14. The first facets 28 emit light 14 incident directly from the body 18, and therefore the first facets 28 can have any suitable design contour chosen in a given application, for example, without being limited to, a straight and flat contour. The first facet 28 includes an inner portion 28a and an outer portion 28b. The outer portion 28b of the first face 28 is preferably black to absorb ambient light 32. The black color can be provided by applying black paint to the outer portion 28b or by applying black paint to the outer portion 28b and the entire second facet 30 of joining the mirror to the second facet 30, with the outer portion 28b may be integrally molded with carbon black therein. The outer portions 28b of the first facets 28 may be visible by a display, and consequently the presence of black increases the display contrast from the exit face 16. The second facet 30 also includes an inner portion 30a and an outer portion 30b . The second facet 30 is preferably aligned with the inlet face 12 to block the line of sight transmission of the light 14 towards the outer portion 28b of the corresponding first facet 28 of the same spline 17, while allowing light transmission 14 to adjacent internal portion 28a. In this manner, the inner portion 30a of the second facet 30 is optically aligned with the inner portion 28a of the first facet 28 of the adjacent spline 17. The outer portion 30b of the second facet 30 may be black, further increasing the black surface area of the output face 16, and correspondingly increasing the display contrast. The black color may be provided by applying black paint on the outer portion 30b or by applying black paint to the entire second facet 30 before attaching the mirror to the second facet 30., or the outer portion 30b may be molded integrally with carbon black. In an alternative embodiment of the present invention, the outer portion 30b may also be reflective, although such an embodiment may show a degraded display contrast. The outer portion 30b of the second facet 30 may be optically aligned with the corresponding outer portion 28b of the first facet 28 of the adjacent spline 17 to use and exploit the black contrast. Figure 4 is a side schematic view illustrating a vertical cross-section of an alternative embodiment of the deployment panel 10 modifying the light propagation of Figure 3, wherein the grooves 17 may be cut on one part or totally for removing the outer portions 28b, 30b, while retaining at least the inner portions 28a, 30a of the first and second facets 28, 30. In this alternative embodiment, a portion of the outer portion 28b of the first facet 28 may remain of the 2, and the complete outer portion 30b of the second facet 30 is removed, thus forming a vertical front face 17a for each groove, whose vertical front face 17a is aligned in parallel with the outlet face 16. The outer portion 28b of the first Facet 28 and vertical front face 17a are preferably black to provide a display contrast. This cut can be made to uniform the sharp edges of the grooves 17, thus providing a durability of the deployment panel that modifies the propagation of the light 10, as well as increasing the ease of manufacture. Figure 5 is a schematic isometric view illustrating a horizontal cross section of an alternative embodiment of the deployment panel that modifies the propagation of light 10, wherein the second facet 30 may be substantially granular, rough, concave or convex to disperse the light 14 horizontally from a corresponding propagation angle D, in addition to propagating the light with the vertical cone angle B as illustrated with respect to figure 3. The second facet 30 may have a double arch, as convex in the vertical direction in all the height of the screen, as well as in the horizontal direction over the entire width of the screen. Alternatively, the second facet 30 may be double concave. The second facet 30 may be toothed in a series of repeating concave or convex portions to horizontally disperse the light. The first face 28 may be straight and configured as illustrated with respect to FIG. 3, but the first face 28 may then be correspondingly notched on the outer end to engage the indentation of the second facets 30. FIG. 6 is a schematic side view illustrating a vertical cross-section of the embodiment of the deployment panel modifying the propagation of light 10, wherein the grooves 17 are incorporated in an equipment optical waveguide panel which is described in FIG. US patent do not. 5,381, 502, incorporated herein by reference. In this embodiment, the body 18 includes a plurality of stacked optical waveguide guides 16a, which extend from the entrance face 12 to the exit face 16, to make channels and independently confine the light 14 therethrough. Each waveguide 16a extends the full width of the panel 10. Each waveguide 16a has a transparent core laminated between suitable coating layers having a lower refractive index to obtain a substantially total internal reflection of the light 14 in cores individual The stria 17 can take any suitable shape, such as the triangular grooves 17 illustrated in Figure 2 and Figure 3, for example. Each of the waveguides 16a is optically aligned with at least one of the grooves 17 to provide improved resolution in the vertical direction. Those skilled in the art will recognize that many modifications and variations of the present invention can be instrumented. The description made and the following claims are intended to cover such modifications and their variations.

Claims (88)

NOVELTY OF THE INVENTION CLAIMS

1. - An optical panel comprising: a light transmission body having an exit face, an entrance face, and a rear end; and at least one light propagation modification element positioned on the exit face that modifies the propagation of the incident light along an axis of incidence that is not perpendicular to the exit face, towards an exit axis which varies from the incidental axis and is directed to a desired viewing direction.

2. The optical panel according to claim 1, wherein the output shaft is perpendicular to the output face.

3. The optical panel according to claim 1, wherein the light is not transmitted towards the rear end.

4. The optical panel according to claim 1, wherein said light propagation modification element is chosen from the group consisting of a holographic coating, a lens, a series of lenses, a microlens, a series of microlenses , a Fresnel prism, and at least one polished surface.

5. The optical panel according to claim 1, wherein said light propagation modification element is placed on the outlet side using a connector selected from the group consisting of epoxy, rubber, indexed binding fluid and tape. double side transparent adhesive.

6. The optical panel according to claim 1, wherein said light propagation modification element is molded on the outlet face.

7. The optical panel according to claim 1, wherein the light is shown on the output side as a video image.

8. The optical panel according to claim 1, wherein the light is shown as an illuminated button.

9. The optical panel according to claim 1, further characterized in that it comprises a light generator.

10. The optical panel according to claim 9, wherein the light generator includes: a light source; a light modulator; and image formation optics.

11. The optical panel according to claim 10, wherein said light source is selected from the group consisting of an incandescent lamp, an LED, a laser or an electric arc.

12. The optical panel according to claim 10, wherein the light from said light source is modulated by said light modulator to define pixels.

13. The optical panel according to claim 10, wherein said light modulator is selected from the group consisting of a liquid crystal display, a digital micromirror device, a CRT, an EDF, a vector scanner and a plot explorer.

14. The optical panel according to claim 10, further characterized in that said image forming optics includes at least one mirror that bends the light and at least one lens.

15. The optical panel according to claim 14, further characterized in that said image forming optics is optically aligned between the input face and said light modulator to compress, expand and focus the light so that it conforms to the entry face.

16. The optical panel according to claim 1, wherein said light transmission body is formed by a plurality of optical waveguide stacked.

17. The optical panel according to claim 16, wherein each optical waveguide has a first end and a second end, and wherein the plurality of the first ends defines the exit side and the plurality of end seconds. define the entrance face.

18. The optical panel according to claim 16, wherein each waveguide extends horizontally and the plurality of stacked waveguides extend vertically.

19. The optical panel according to claim 16, wherein the plurality of optical waveguides each is formed of a material that passes electromagnetic waves through it.

20. - The optical panel according to claim 19, wherein the material is a glass.

21. The optical panel according to claim 20, wherein the glass is formed into sheets.

22. The optical panel according to claim 21, wherein the sheets are approximately 0.0101 cm thick.

23. The optical panel according to claim 1, wherein the exit face is located obliquely with the entrance face.

24. The optical panel according to claim 1, wherein the exit face is generally arranged perpendicular to the entrance face, thus forming a triangular wedge between the entrance face and the rear end.

25, .- The optical panel according to claim 24, wherein the panel has a width along the horizontal part of the exit face, a height along the vertical of the exit face, a upper and lower part along the entrance face, the lower part of which has a depth from the outlet side to the rear end.

26. The optical panel according to claim 25, wherein the triangular wedge has an angle in a range of about 1 to 10 ° from the exit side towards the rear end.

27. - The optical panel according to claim 26, wherein the triangular wedge has an angle of about 5o from the exit side toward the rear end.

28. The optical panel according to claim 25, wherein the aspect ratio of width to height is 4: 3.

29. The optical panel according to claim 25, wherein the aspect ratio of width to height is 16: 9.

30. The optical panel according to claim 25, wherein the depth of the lower part is in a range of about 8 to 10 cm, and where the height of the panel is 100 cm and the width of the panel is 133 cm.

31. The optical panel according to claim 1, wherein said light propagation modification element is at least one groove.

32. The optical panel according to claim 31, wherein at least the groove is generally triangular in vertical cross section.

33. The optical panel according to claim 31, wherein at least the groove is made on the exit face.

34. The optical panel according to claim 33, wherein the cut is made using a milling machine.

35. - The optical panel according to claim 34, wherein the milling machine is a dovetail reamer having a curved cutting surface.

36.- The optical panel according to claim 31, wherein a plurality of grooves are separated at intervals previously determined vertically along the exit face, to receive and modify the direction of the light portions respectively, and wherein each flute extends continuously horizontally along the entire output face.

37.- The optical panel according to claim 36, wherein each flute includes a first transparent facet, said first facet is optically aligned to transmit the incident light from the input face, and a second reflective facet to reflect the light from a first opposite facet of one of the adjacent grooves.

38.- The optical panel according to claim 37, wherein the second facet includes a reflection surface.

39.- The optical panel according to claim 38, wherein the reflection surface of the second facet is formed by attaching a thin sheet to the second facet, said used sheet having an adhesive backing.

40.- The optical panel according to claim 38, wherein the reflection surface is formed by coating the second facet with a material having a high reflection index.

41. - The optical panel according to claim 37, wherein each of the second facets is inclined substantially vertically upwardly outward from a vertical along the exit surface, and is obliquely aligned with the first facet of one of the adjacent grooves.

42.- The optical panel according to claim 41, wherein the angular inclination of the second facet is coordinated with a light transmission axis to form the light in a viewing cone, said viewing cone is substantially perpendicular to the exit side.

43.- The optical panel according to claim 42, wherein each of the second facets is vertically arched.

44.- The optical panel according to claim 37, wherein the first facet includes a first internal portion and a first external portion.

45.- The optical panel according to claim 44, wherein the first external portion of the first facet is black to absorb ambient light.

46.- The optical panel according to claim 45, wherein the black color is provided by an application of a black paint to the first external portion.

47. - The optical panel according to claim 46, wherein the black color is provided by integral molding of the plurality of flutes with carbon therein.

48. The optical panel according to claim 44, wherein the second facet includes a second internal portion and a second external portion.

49.- The optical panel according to claim 48, wherein the second facet is aligned with the internal face to block the transmission of the line of sight of the light towards the first external portion of the first facet of the same groove, while allowing the transmission of light towards the first inner portion of the first facet of the adjacent grooves.

50.- The optical panel according to claim 49, wherein the second external portion of the second facet is black.

51.- The optical panel according to claim 48, wherein the second external portion of the second facet is reflective.

52. The optical panel according to claim 48, wherein the grooves are cut to remove a portion of the first inner portion and the second inner portion.

53. The optical panel according to claim 48, wherein the flutes are completely cut to eliminate the first external portion and the second external portion.

54. - The optical panel according to claim 53, wherein the total cut forms a vertical front face that is parallel to the exit face.

55.- The optical panel according to claim 37, wherein the second facet is suitably granular to horizontally disperse the light.

56.- The optical panel according to claim 37, wherein the second facet is suitably roughened to horizontally disperse the light.

57.- The optical panel according to claim 37, wherein the second facet is suitably concave to horizontally disperse the light.

58.- The optical panel according to claim 37, wherein the second facet is suitably convex to horizontally disperse the light.

59.- The optical panel according to claim 37, wherein the second facet has a double arc to scatter light horizontally and vertically.

60.- The optical panel according to claim 37, wherein the second facet is toothed in a series of concave or convex horizontally repeating portions to horizontally disperse the light.

61.- A method for producing an optical panel of stacked waveguides having a controlled light cone of emission from there, comprising: placing a first sheet of glass in a channel with a size slightly longer than the first sheet of glass; fill the channel with an epoxy of thermal cure; stacking a plurality of glass sheets, each having properties, of light transmission equivalent approximately to the first glass sheet, a surface of the first glass sheet, thereby forming an epoxy layer between each of the sheets of glass. glass; applying uniform pressure to the stack formed by said stacking, thereby causing the epoxy to flow at a generally uniform level between two adjacent glass sheets; bake the stack to heal; cool the stack slowly to avoid breaking the glass sheets; placing the sheet against a saw and cutting the stack, using the saw, at two opposite ends at an angle to form a wedge-shaped panel having an entrance face and an exit face, and forming on the exit face a plurality of elements for modifying the propagation of light that direct the incident light on the outlet face in a controlled cone of light.

62. The method according to claim 61, further comprising polishing the cut pile to eliminate any mark of the saw.

63. The method according to claim 62, wherein said polishing is performed using a diamond polisher.

64.- The method according to claim 62, wherein the epoxy is black.

65. The method according to claim 61, wherein the epoxy has a lower refractive index than the first glass sheet.

66.- The method according to claim 61, wherein said stack is at an angle of less than 90 °.

67.- The method according to claim 61, wherein said stacking is repeated until about 600 to 800 sheets are stacked.

68.- The method according to claim 61, wherein the generally uniform level is approximately 0.0005 cm.

69. The method according to claim 61, wherein the saw is a circular saw with diamond-shaped teeth.

The method according to claim 61, wherein the baking takes place at approximately 80 ° C.

The method according to claim 61, wherein the light propagation modification elements are grooves.

72. The method according to claim 71, wherein said forming a plurality of grooves includes: securing a plastic POD in a mill; and programming the milling machine to cut a plurality of flute grooves that will match the waveguides of the output face.

The method according to claim 72, wherein said programming is performed to allow the grooves to show a coincidence of at least one groove for each waveguide.

The method according to claim 71, wherein said forming a plurality of flutes includes: forming a single fluted master grid to match a standard output face; replicate a new grid of grooves from the single master grid of grooves; and securing the new groove grid, counting therein with a plurality of grooves, towards the outlet face.

75.- A method for producing an optical panel of stacked waveguides having a controlled cone of light emitting therefrom, comprising; horizontally stacking a plurality of sheets of glass; place a curable ultraviolet adhesive between each glass sheet; cure each adhesive layer using ultraviolet radiation; placing the stack against a saw and cutting the stack, using the saw, at two opposite ends to form a panel having an inlet face and an outlet face; and forming on the exit face a plurality of light propagation modification elements directing incident light on the outlet face in a controlled light cone.

76. The method according to claim 75, further comprising polishing the cut pile to eliminate any mark from the saw.

77. The method according to claim 76, wherein said polishing is performed using a diamond polisher.

78. - The method according to claim 75, wherein the ultraviolet curable adhesive is black.

79. The method according to claim 75, wherein the curable adhesive has a lower refractive index than each glass sheet.

80.- The method according to claim 75, wherein said stacking is repeated until about 600 to 800 sheets are stacked.

81. The method according to claim 75, wherein the ultraviolet curable adhesive layer has a depth of about 0.0005 cm.

82. The method according to claim 75, wherein the saw is a circular saw with diamond-shaped teeth.

83. The method according to claim 75, wherein the glass sheets have a width ranging between about 1.27 cm and 2.54 cm.

84. The method according to claim 75, wherein the light propagation modification elements are striae.

The method according to claim 84, wherein said forming a plurality of grooves includes: securing a plastic POD in a milling machine; and programming the milling machine to cut a plurality of flute grooves that will match the waveguides of the output face.

86. - The method according to claim 85, wherein said programming is performed to allow the grooves to show a coincidence of at least one groove for each waveguide.

The method according to claim 75, wherein said forming a plurality of grooves includes: forming a single master grid of grooves to match a standard output face; replicate a new master groove grid from the master groove grid; and securing the new groove grid, counting therein with a plurality of grooves, towards the outlet face.

88. A method for cutting grooves is an exit face of a deployment screen formed by a plurality of waveguides comprising: fixing a plastic POD in a mill; and programming the milling machine to cut a plurality of flute grooves that will match the waveguides of the output face. The method according to claim 88, wherein said programming is performed to allow the grooves to show a coincidence with at least one groove for each waveguide. 90.- A method for cutting grooves on an exit face of a deployment screen formed by a plurality of waveguides comprising: forming a single master grid of grooves to match a standard output face; replicate a new grid of grooves from the single master grid of grooves; and securing the new groove grid, having therein a plurality of grooves, towards the exit face.