LIGHT PANEL SHADE

Abstract

This invention relates generally to a light panel light source shade in the form of a masking tape or sheet. Ideally the masks may be printed directly on a surface design layer for use with the light panel. The invention is for use in the field of decorative 5 lighting. The problem of the alternating bright and dark areas on an illuminated face of a pane of a light panel is that they produce an unpleasant mottled surface brightness around the perimeter or across a face of the pane of a light panel. A light pane light source shade is developed to produce a uniform intensity of light across the face of the light panel.

Claims

1-33. (canceled)

34. A shade to transmit uniform light emission from a light panel having bright and dark areas; the shade has the form of a film sheet or tape which has regions of various preselected opacity spanning the length of the sheet or tape, characterised in that the opacity of the regions varies in register with the brightness of the areas.

35. A shade according to claim 34 wherein the opacity of the regions is graduated to decrease in register with the brightness of the light pattern from a central portion of the regions to the edge of the regions.

36. A shade according to claim 34 wherein the film comprises a sheet wide enough to be marked with masks that shade bright areas extending from the edge of the face of the panel toward the center of the panel and that shade bright areas on the central area of the panel.

37. A shade according to claim 34 wherein the film has the shape of a strip of tape.

38. A shade according to claim 34 wherein the regions comprise a stripe of preselected opacity parallel to the lengthwise edge of the sheet or tape.

39. A shade according to claim 34 wherein a lengthwise edge of the sheet or tape has a shape form to follow a contour of a contiguous shaded region.

40. A shade according to claim 34 wherein the regions have a preselected white colour which varies in register with the brightness of the areas.

41. A shade according to claim 34 wherein portions of the regions are formed from ink that is at least 70%white ink, and up to 30%of a mixture of cyan ink, magenta ink and black ink so as to transmit white light from the areas.

42. A shade according to claim 41 wherein the ink comprises between 5% and 25% cyan ink and between 5% and 25% magenta ink and up to 6% black ink.

43. A shade according to claim 34 wherein the ink comprises titanium dioxide and an optical brightener which absorbs light in the ultraviolet spectrum and re-emits the light in the blue spectrum.

44. A shade according to claim 34 wherein the regions have a pre-selected opacity or colour which varies according to a mathematical function or a map defining the brightness of the areas.

45. A shade according to claim 34 wherein the film sheet or tape comprises a layer of adhesive so as to stick the film to the pane when brought into contact; wherein the adhesive has a preselected colour, transparency, or translucency to regulate the intensity and colour of light transmitted.

46. A shade according to claim 34 comprising a layer of adhesive which includes a strip of transparent adhesive between 0.5 millimetres and 2.0 millimetres wide arranged only along the length of a lengthwise edge of the film sheet or tape.

47. A shade according to claim 34 roll-able into a roll of tape.

48. A light panel has a shade in the form of a film having regions of varying reflectivity and/or opacity so as to define a mask or a plurality of masks each dimensioned and arranged to lie in register with a light source located to shine through a light emitting pane of the panel so as to ensure regulated light emission from said panel.

49. A light panel according to claim 48 wherein the mask is dimensioned and arranged so as to shade a pattern shone through the pane from the light source so that light radiates from said panel with uniform intensity.

50. A panel according to claims 48 wherein the shade has a shape with an edge to conform to an edge of a perimeter of a face of the light emitting pane.

51. A panel according to claim 48 wherein the shade is a band or tape.

52. A panel according to claim 48 wherein the shade has the form of a border to cover an area proximate the perimeter of the pane and ensure substantially uniform light transmission from said panel.

53. A panel according to claims 48 wherein the shade has a shape to cover substantially an entire face of the light emitting pane.

54. A panel according to claim 48 wherein the masks are formed by a white ink tinted with between 5% and 25% cyan and between 5% and 25% magenta and up to 6% black ink according to a spectral rating of a light source comprised in the light source.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0089] FIG. 1 is an exploded assembly view of a light panel according to the invention;

[0090] FIG. 2 is an exploded assembly view of an LED light strip for insertion into a slot in a pane;

[0091] FIG. 3 is view looking at the pane of a light panel illuminated by LEDs fixed to a side of the pane.

[0092] FIG. 4 shows a light panel light source shade;

[0093] FIG. 5 shows a pane of light pane with a light source shade in the form of a strip masking bright areas on the perimeter of the pane;

[0094] FIG. 6 shows a view looking at a pane of a light panel having LEDs embedded in the central region of the pane;

[0095] FIG. 7 shows a view looking at a pane of a light panel with a light source shade in the form of a sheet masking bright areas on the central area of the face of the pane;

[0096] FIG. 8 shows parallel rows of lighted rods comprising LED lights and a masked sheet arranged between the rows of lighted rods and translucent or transparent panel;

[0097] FIG. 9 shows an isometric view of a light box with an open top comprising light sources on the bottom;

[0098] FIG. 10 shows an isometric view of a light box with an open box comprising fluorescent light tubes at that bottom;

[0099] FIG. 11 shows an isometric view of the light box of FIG. 10 having the open top covered by a masked sheet and pane of a light panel;

[0100] FIG. 12 shows a detailed view of the light panel light source shade shown in FIG. 4 and FIG. 5; and

[0101] FIG. 13 shows a shade in the form of a film tape fixed light emitting pane of a light panel with a strip of adhesive tape along an edge of the shade.

DETAILED DESCRIPTION OF THE INVENTION

[0102] Referring to the Figures, there is shown in FIG. 1 an exploded view of a light panel 100 comprising a light panel shade 200. The light panel also comprises a pane 40 which is a transparent or translucent plate of polymeric material or glass. Located at the perimeter of the pane 40 is an LED strip 12 that comprises a row of LEDs 10. The LEDs are arranged to shine in through a side 50 of the pane 40. The light that shines into the pane 40 through the side 50 also shines out of a face 60 of the pane 40. A person viewing the light panel can see though the pane even when it is illuminated by the point sources along the perimeter unless an opaque or translucent or white backing panel is used.

[0103] The light panel shade 200 is made from a polymeric film. Suitable films are not limited to photographic film. In one embodiment the film can be is made from a material that due to the effect of static electricity tends to be drawn to stick face to face to the pane. The film may also have a sticky adhesive on a side to assist sticking the light panel shade 200 to the face 60 of the pane 40.

[0104] In FIG. 2 there is shown a pane 40 of a light panel. The pane 40 comprises a slot 70 through the face 60. The slot 70 is aligned with a side 50 of the pane 40. An LED strip 12 0 comprising a row of LEDs 10 is located in the slot 70 and arranged to shine towards the center of the pane 40. Light from the LEDs illuminates the face 60 of the pane 40 and it also shines out of the opening slot 70 opening the face 60 making the slot visible as a bright line on the face 60.

[0105] In FIG. 3 there is shown a section of an illuminated light panel. At one edge of the pane 40 there are bright areas 300 between darker areas 310. Each bright area is located in the vicinity of an LED fixed to a side of the pane 40. In the areas between the LEDs there are dark areas 310. The adjacent bright area 300 and dark areas 310 mottle the face 60 of the pane 40 in the vicinity of the perimeter of pane. The face of the pane therefore does not radiate light with even intensity in the region of the perimeter.

[0106] Also in FIG. 3 it is demonstrated that one side of the light panel incorporates point light sources shining in through the side. On smaller panels of less than substantially 30 cm30 cm a single side with point light sources is sufficient to illuminate the panel. In larger panels it is preferable to incorporate two or more sides of point light sources to increase the light transmitted along the surface of the panel. All four sides on a large rectangular panel will therefore preferably incorporate light point sources. A large hexagonal panel would preferably incorporate light point sources on six edges.

[0107] FIG. 3 also shows three sides that do not incorporate point light sources. Sides that do not incorporate light point sources will still show as areas brighter than the overall surface of the light panel because light will reflect off a side, whether or not there are light sources along the side. A bright light reflection which will have the appearance of a brighter stripe along the perimeter of the light panel is visible along the perimeter edges of the panel.

[0108] FIG. 4 shows a light panel light source shade 200 in the form of a strip of film. The film 210 is transparent and is marked with a row of shaded regions which span the length of the tape and are appears as masks 220. The masks are spaced apart according to the spacing of the bright areas 300 running along the perimeter of a pane 40 corresponding light panel as shown in FIG. 3.

[0109] The shape of each mask 210 is determined by mapping the intensity of the light on the face 60 of the pane 40. The intensity varies as shown in FIG. 3 where there are bright areas 300 and interspaced by dark areas 310.

[0110] Specific locations on the film where the regions of preselected opacity are located, correspond to specific locations on the pane where the bright areas and dark areas are located. The opacity of a specific location in a region of the film having preselected opacity is in register with the brightness of the corresponding location of the pane.

[0111] The masks 210 are white or predominately white colour. The masks 210 vary from nearly opaque or totally opaque depending on the brightness of the light and therefore the opacity of mask required to diffuse it in the central area of each mask to nearly transparent near the edge of the mask. The amount of light transmissibility of each area is preselected according to the map of the intensity of the light on the face 60 of the pane 40.

[0112] In areas of the mask 210 corresponding to the brightest areas 300 on the face 60, the mask is nearly opaque or totally opaque. In the areas of the mask 210 corresponding the darkest areas 310 on the face 60 the masks are nearly transparent. In the areas of the mask between the nearly opaque and nearly transparent areas the light transmissibility of the mask varies according to the light map.

[0113] The light panel light shade 200 is placed on the face 60 of the pane as shown in FIG. 5. The shade is located on the face 60 of the pane 40 where the nearly opaque areas of each mask 220 cover the brightest areas 300 on the face 60. The transparent areas of the shade cover the dark areas 310 on the face.

[0114] In FIG. 5 the shade 200 in the form of tape is shown in use on the face 60 of a light emitting pane. The shade 200 is shown in FIG. 4, and the shade 200 is shown in more detail in FIG. 12.

[0115] The shade 200 comprises a transparent primary film 210 having regions of various opacity to define primary masks 220 distributed along the tape and arranged in a row parallel with the lengthwise direction of the tape to, in use, lie in register with a light pattern comprising alternating bright 300 and dark 310 regions on a light emitting pane 60. When the masks are in register with the alternating bright 300 and dark 310 regions, the side 50 of the face of the pane 60 is collinear with a lengthwise edge of the tape.

[0116] The shape and transmissibility of the masks 210 is such that the intensity of the light that shines through the light source shade 200 is substantially uniform over the entire area of shade.

[0117] FIG. 12 shows the shade 200 in more detail. The shade 200 comprises a film and has the form of a strip and is also known as a shade strip 200. A long strip is a tape and can be rolled into a tape roll.

[0118] In FIG. 4 and FIG. 12 the shade has a region of preselected opacity 220, 221, 222, 225, 226, 227, 228, 230 which spans the length of the tape. A portion of the region comprises primary masks 220 of preselected opacity. In FIG. 4 each of the primary masks 220 is shown to have an oval shape. In FIG. 12 the primary mask 220 is shown to have an elongate shape extending from a lengthwise edge of tape. The shape of the masks may differ from that shown in FIG. 4 or FIG. 12 because the shape is tailored for a specific arrangement of lights for a specific light panel. The masks are arranged on the film 210 in a row parallel to the lengthwise edge of the strip or tape.

[0119] Shown in FIGS. 4, 5, and 12 are stripes of white ink 221, 222 offset from the lengthwise edge of the tape and aligned parallel to the lengthwise edge. These stripes of mask connect the primary masks 220. They also shade stripes of light on the face of the light emitting pane caused by light shining into the side 50 of the pane.

[0120] Shown in FIG. 12 is a portion of the region of preselected opacity that is a fringe 230 along the edge or rim of the primary mask 220. The fringe 230 has a lower opacity than the primary mask. The opacity of the fringe is graduated so that the fringe is most opaque where it is adjacent the primary mask 220. The fringe is least opaque near the edge farthest from the primary mask. The fringe ensures that when the shade is in use covering the light pattern by covering the face of the pane in register with the light pattern that the light transmitted through the shade from face of the pane appears uniform.

[0121] FIG. 12 shows that there are secondary masks 225, 226, and 227 on a portion of the primary mask 220. The secondary masks comprise white ink. The secondary masks are places so as to provide additional shading for especially bright spots on in the light pattern.

[0122] FIG. 12 also shows that there are portions 225, 226, 227 of the region of preselected opacity that have different preselected opacity than other portions of the region. These portions may be located within the portion of the region that is a primary mask as is shown in FIG. 12, but this is not necessary. The portions 225, 226, and 227 may be tinted to a different tint than other portions of the region of preselected opacity. The tint may be a black or blue tint form by tinting white ink with cyan, magenta, and black ink. The portions of the masks so tinted negate yellowing of light transmitted through the masks from the face 60 of the pane.

[0123] FIG. 13 shows a shade 200 comprising a film strip 210. The film strip 210 is laid onto the face 60 of a light emitting pane 40. An adhesive strip 280 is laid along a lengthwise edge of the film strip 210. The adhesive strip 280 overhangs the lengthwise edge of the film strip. The adhesive strip is set along the lengthwise length of the film strip. The adhesive strip is between 0.5 millimetres and 2.0 millimetres wide. The length of the adhesive strip that overhangs the film strip is bent over corner edge of the light emitting pane and stuck to the side 50 of the pane.

[0124] The intensity of the light let through the light source shade near the edge 240 of the shade nearest the center of the face 60 is substantially the same as the intensity of the light radiating from the face 60 of the pane in the area 65 nearest to the edge 240 of the shade nearest to the center of the shade. The effect is that with the light source shade in position on the face 60 of the pane, there are no mottled bright and dark areas on the surface of the pane. To an observer viewing the face 60 of the illuminated pane, the entire face appears to have uniform brightness when viewed through the slide or surface design layer.

[0125] A light panel 100 comprising the shade 200 has uniform brightness of face and is ideal for use as a backlight since a slide can placed directly against the face 60 and the shade 200 without being spoiled by mottled light areas. Also thereby the entire illuminated area of the panel is utilized for maximum efficiency of the light produced.

[0126] A light panel 100 comprising the shade 200 does not require a light box to support a slide above the face 60 of the pane. This saves the cost of light box. A light panel without a light box is also relatively thin. A thin light panel is preferred where the light panel is used to light walls of a narrow hallway or a low ceiling.

[0127] FIG. 6 shows a face 60 of a portion of a pane 40 of a light panel wherein point light sources 320 are located in a central area of the pane 40. The light sources 320 may be LEDs embedded in the pane 40 or fixed to the back surface of the pane face 60. The LEDs are arranged to shine light out through the front of the pane face 60.

[0128] Where the point sources 320 are located in the central area of the pane 40, corresponding bright areas are produced on the face 60 of the pane 40.

[0129] FIG. 7 shows a light source shade in the form of a film having the shape of a sheet 260. The sheet 260 is transparent or translucent or transparent marked with masks 270 of preselected opacity. The masks may also have a preselected colour or tinting. Each mask 270 is located on the sheet 260 in a position corresponding to a respective bright area 320 on the pane 60.

[0130] In one embodiment the sheet 260 is made from a film that is susceptible to charging with static electricity so that the sheet tends to stick to the face 60 of the pane 40 due to static electrical attraction. The sheet 260 may also be coated with adhesive on one side to stick the face 60.

[0131] The transmissibility of each mask 270 to light varies depending on the particular area of the mask. The mask 270 is most opaque near the central region corresponding to the area 320 on the pane that is brightest. The mask 270 is most transmissible to light near the edge of the mask. Between the central region of the mask where the mask is opaque or nearly opaque and the edge where the mask is nearly transparent, the transmissibility of the mask is graduated according to the intensity of the area on the face that the sheet 260 is intended to cover.

[0132] A map of the bright areas 310 on the face is produced by measuring the light intensity. With the light shade sheet 260 in place on the face 60 of the pane 40 each mask covers a corresponding bright area 310. The transmissibility each mask 270 is graduated so that the brightness of the face of the pane covered by sheet 260 appears to be uniform to an observer viewing the light panel 100. Thereby the entire illuminated area of the panel is utilized for maximum efficiency of the light produced, and the light panel does not require a light box to support a slide above the face 60 of the pane.

[0133] The light shade mask 220 also affects the shade or colour of the light transmitted through it. The film 210 of the light shade 200 does not affect the colour unless the film is not colourless and transparent.

[0134] The light shade 200 masks and/or film may be coloured or tinted to correspond with LEDs of different colours and spectral temperature ratings. A light panel fitted LEDs that radiate a preselected tint will radiate tinted light out through the face 60 of a colourless transparent or translucent pane 40. The light shade masks and/or film may be coloured and/or tinted so that the colour or tint of the light that shines through the masks and/or film appears to be the same as the colour and/or tint of the light before it shines through the film and/or the mask. A person observing the illuminated face of the pane sees no difference in the colour or tint of the light where it passes directly out of the pane and where it passes through pane and the light shade.

[0135] For example white LEDs may be preselected with a tint corresponding to Kelvin levels.

[0136] To make the colour of the light transmitted though the mask 220 be substantially the same as the colour of the light transmitted directly out of the pane 40 the colour of the mask 220 may be shaded according to the Kelvin (K) level of the LEDs. An embodiment of a light panel with LED lights set to a level of 5300K would utilize a mainly white mask 220 that marks the film 210 wherein the white is mixed with a low percentage of cyan and magenta and black or other light diffusing substance. The percentage is the range of 0.01 percent to 25%. The tinted mask in this embodiment would prevent yellowing of white light transmitted through it. Other embodiments of a panel comprising LEDs with different Kelvin levels or different colours would require the ratio and colours of the ink to be calculated according to the colour of the LEDs.

[0137] Preferably the film has single static side so that the static side is arranged to stick to a glass or acrylic pane and the tape itself. The other side of the film has a surface to which ink readily adheres. Advantageously masks are preferably applied with ink to one side of the tape. The tape is stored and distributed on a roll for convenient application to a pane at a remote location such as a light panel manufacturing factory. The tape is advantageously rolled with the static side sticking to the side that has masks applied by ink. The ink does not get pulled off the tape when the tape is unrolled because the ink adheres preferably to the other side of the film.

[0138] The light source shade is also effective with panes of a light panel arranged differently to that shown in FIG. 2. For example the light source shade is effective with a light panel arranged with LEDs on the outside of pane and with LEDs set in a transparent or translucent tube.

[0139] An alternative arrangement for providing illumination through a transparent or translucent pane 40 of a light panel is shown in FIG. 8. A transparent or translucent panel 440 is illuminated by three lighted rods 405.

[0140] Lighted rods 405 are transparent tubes containing LED lights 10. In operation a lighted rod appears as a row of LED lights.

[0141] The LED lights shine through the pane 40 of the light panel.

[0142] It is desired for the transparent or translucent pane 40 of the panel 440 to appear as surface of uniform illumination. However if the LED lights were placed directly behind the transparent or translucent panel, they would spoil the uniform illumination effect. The LED lights would be visible as bright spots through the panel 440. The LED lights would also appear as bright spots on any translucent image placed on the panel which spoils the view of the image.

[0143] A variation of the present invention overcomes the problem of the LED lights being visible as bright spots through the panel. This variation comprises a masked sheet 420 as shown in FIG. 8. The masked sheet 420 is transparent or translucent in areas where it is not masked. These unmasked areas 425 are indicated on the masked sheet. The masked sheet also has masked areas 430. The degree of transparency or translucency of the masked sheet in the masked area is preselected.

[0144] The effect of the preselecting the degree of translucency that the amount of light that passes through the masked areas of the masked sheet results in the transparent or translucent pane 40 of the panel 440 being illuminated with light of uniform intensity across the entire surface area of the pane of the panel 440.

[0145] To achieve the effect of uniform light intensity across the surface area of panel several alternative methods of preselecting the degree of transparency or translucency of the masked areas are used either alone or in combination.

[0146] One method is to take a photograph of the panel 440 with a digital camera or using photometric or other light imaging equipment while the light from the LED light is shining through the panel. The intensity of the light shining through the panel is digitally recorded on a grid across the surface of the photograph. The amount of translucency or transparency of the masked area associated each point on the grid is calculated. A corresponding grid is produced on the masked sheet. This may be a virtual grid on simulated masked sheet or it may be an actual grid on the masked sheet or it may be an overlay grid sheet to overlay on the masked sheet. Instructions are written to produce the masked sheet 420 with the right amount of translucency or transparency at each location of the corresponding grid.

[0147] After the masked sheet 420 has been produced with the preselected degree of transparency or translucency in each masked area, the masked sheet is placed between the rows of lighted rods 410 containing LED lights and the transparent or translucent pane of the panel 440.

[0148] In use light radiated from the LEDS in the rods passes through the masked sheet 420. The light that passes through the unmasked areas 425 of the masked sheet does so with virtually no reduction in intensity. The light that passes through the masked areas 430 has its intensity reduced by an amount proportional to the degree of masking. As a result the intensity of light that reaches the transparent or translucent panel 440 has a uniform intensity across the area of the translucent panel. The result is that the LED lights are invisible to a person who observes the uniform intensity of light that has passed through the transparent or translucent panel. To this person the transparent or translucent panel appears as a lighted panel, wall, ceiling, floor, or other surface lit up with a light of uniform brightness across its area.

[0149] A slide or surface design layer, not shown in FIG. 8, can be placed above the pane 40 of the light panel 440. The light panel 440 is for use as backlight for the slide or surface design layer. In one embodiment the slide or surface design layer comprises the masked sheet 420. Hence masked sheet is an integrated shade of primary masks. The masked sheet is integrated with the slide or surface design layer. Each mask is dimensioned and arranged so as to shade a light pattern corresponding to a point light source 10 arranged to shine through the light emitting pane 40 of the panel 440 so that light radiates from said panel with uniform intensity.

[0150] FIG. 9 shows an alternative device for arranging the lights to shine through the panel. The light arranging device has the form of a shallow box with an open side. At the bottom of the box are light sources 10 such as LED light sources 10 or fluorescent tubes 505. The light arranging device comprises a perimeter wall 415 made of opaque material such as metal sheet. The wall surrounds the perimeter of the bottom 460 of the box. The light sources 10 are fixed to or near to the bottom of the box and surrounded by the wall.

[0151] The open side of the shallow box is covered by a transparent or translucent pane. The pane is shown in FIG. 8, but it is not shown in FIG. 9. The perimeter wall 415 of the box matches the perimeter of the panel so that pane closes the box with light sources inside. The gap between the light sources and the pane reduce the visibility of LEDs showing on the surface design layer on the panel. The height of the perimeter wall corresponds to the gap between the LED's and the pane.

[0152] A disadvantage of a light box with a high perimeter wall is that a light panel comprising the box covered by a pane has a height that can take up valuable space in a room.

[0153] A panel comprising a shade according to the invention does to not need a light box with a high perimeter wall. The gap does not need to be as great with a light source shade for a light panel. The shade obscures the light sources even for a relatively low walled light box.

[0154] An isometric view of a light box with an open box comprising fluorescent light tubes 505 at that bottom. This light box is similar to that shown in FIG. 8, the difference being the lighted rods are replaced by light tubes.

[0155] In FIG. 11 the light box of FIG. 10 is shown covered by a masked sheet 420 and a pane 40 similar to the light box of FIG. 8. The masks 430 are shown as stripes on the masked sheet 420. The density of the shading of the masks is less near the edge of the stripe and greater near the middle of the stripe. A similar variation in density of the shading is present in FIGS. 1, 2, 4, 5, 7, and 8. The density is greater in interior area of the mask and the density is relatively less near the edge of the mask.

[0156] To prevent the light that passes through the mask from appearing yellow is accomplished by forming the mask with a coating of white ink that does not contain titanium or by adding ink tinted with small levels of cyan, magenta and black.

[0157] In one embodiment the ink comprises among other ingredients an optical brightener. An optical brightener absorbs light in the ultraviolet spectrum and re-emits the light in the blue spectrum. Advantageously the optical brightener compensates for the yellowing effect of a titanium based white ink. Typical optical brightening compounds are stilbenes, triazine-stilbenes (di-, tetra- or hexa-sulfonated), coumarins, imidazolinesm diazoles, triazoles, benzoxazolines, and biphenyl-stilbenes.

[0158] In one embodiment the ink comprises particles with a preselected particle size. Advantageously particles within a preselected particle size range prevent halos appearing on the panel due to interaction with the light transmitted through the ink. The haloing effect is summarized as: the bright areas that surround masked areas on a back lit tape when the masking uses an ink with mean particle sizes that are within the visible light range (390-700 nm).

[0159] Pigments are chosen for their ability to reflect light from selected parts of the visible electromagnetic spectrum, and thus produce coloured inks. Ink pigments are milled to small particle sizes and it is most economically viable to have an optimum mean particle size of 50-500 nm. Below this, the gain in light scattering efficiency with volume: weight ratio does not outweigh the energy cost of production. The opacity, colour, hue, tinting strength, gloss, durability and sample viscosity of pigments are all dependent upon the particle size.

[0160] The invention has been described by way of examples only. Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the claims.

LIST OF INTEGERS

[0161] 10 LED light [0162] 12 LED Strip [0163] 40 Pane of Light Panel [0164] 50 Side of Pane [0165] 60 Face of Pane [0166] 65 Face of Pane near edge of shade [0167] 70 Slot in Pane [0168] 200 Shade strip [0169] 210 Film of Shade [0170] 220 Mask of Shade near perimeter, primary mask near perimeter [0171] 221, 222 Stripes of white ink in shade [0172] 225, 226, 227 Secondary Masks of Shade [0173] 230 Faded edge of Mask, fringed perimeter of primary mask [0174] 240 Edge of shade nearest center of face [0175] 260 Shade sheet [0176] 270 Mask of Shade near central area, primary mask central area [0177] 280 Adhesive strip [0178] 300 Bright Area on Face of light emitting pane perimeter area [0179] 310 Dark Area on Face of light emitting pane perimeter area [0180] 320 Bright Area on Face of light emitting pane central area [0181] 330 Dark Area on Face of light emitting pane central area [0182] 405 Lighted Rod [0183] 410 LED lights in lighted rod [0184] 415 Perimeter wall of light box for light panel [0185] 420 Masked Sheet [0186] 425 Unmasked areas of masked sheet [0187] 430 Masked areas of masked sheet [0188] 440 Panel [0189] 460 Bottom of Light box [0190] 505 Fluorescent tube