JP2010113163A - Large back lighting device, such as sign board, display, display panel and illumination panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a large back lighting device capable of increasing the brightness as possible, obtaining the uniform illumination brightness, and also being made thinner in thickness by reducing the thickness to the utmost. <P>SOLUTION: The large back lighting device A having a large illumination surface is formed by arranging nine light guide units 1 having equal brightness in parallel and in series. Each light guide unit 1 is configured to store a light guide panel 12 whose area is equal to that of each of the others, and include LED chips 13 whose brightness is equal to that of each of the others, and equal in number to that of each of the others, on the incident end faces 121 facing each other on one side of the panel in a case 11. The illumination brightness of the illumination surface is adjusted by enlarging and reducing the width of the light guide unit 1 so as to achieve the high brightness, accordingly, the light guide panel 12 of each light guide unit 1 is made thinner in shape, for example, about 5 mm, further, by increasing the number of light guide units 1, the area of the back lighting device A can be freely set. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a large-format backside illumination device such as a signboard, a display, a display board, and an illumination panel.

  Backlighting devices using this type of light guide panel are widely used in, for example, liquid crystal backlights, signboards, displays, and the like. For example, Patent Document 1 listed below is a display plate that is self-supported by a pair of columns. The display panel includes a light guide panel, a plurality of LED light sources arranged in the longitudinal direction adjacent to both opposing ends of the light guide panel, a reflector disposed on the back surface of the light guide panel, and the light guide. The light guide panel is a dot whose density is modulated on the surface of an acrylic transparent plate having a thickness of about 1 cm. The LED light source is white and the color rendering property correction filter of the LED light source is arranged so as to cover the dot surface of the light guide panel. By being as having improved color reproducibility backlighting film as much as possible.

JP 2006-236749 A

  In this case, a back lighting device with good color reproducibility can be obtained by the color rendering correction filter. According to FIG. 1, the back lighting device has a front rectangular shape with a horizontal width of about 1 m and a vertical length of 1 m or less. However, it is not always easy to make the illumination brightness of a back-lighting device with such a large area sufficiently high so that it can be seen from a distance, such as a signboard. is not. In this case, the thickness of the light guide panel is assumed to be about 1 cm. However, the light guide pattern consumes the light guide of the incident light in inverse proportion to the distance from the light source. As a result of promoting the diffuse reflection of incident light in the light guide panel, it is possible to ensure a certain level of illumination brightness. Although it is possible to perform back-lighting with an illumination brightness that does not cause any obstacles, it is possible to improve the back-lighting brightness of the back-lighting device, or to make a large-sized back-lighting device with a width or height of several meters, for example. Therefore, it is necessary to take measures for improving the brightness such as the light guide panel having a thickness of 2 cm or more and the LED light source for supplying incident light being arranged in a plurality of rows in the thickness direction of the light guide panel. , Backlighting Location is a problem arises that even becomes thicker.

  The present invention has been made in view of such circumstances, and the problem to be solved is that it is possible to obtain a uniform illumination brightness as much as possible regardless of the illumination area and to suppress the thickness as much as possible. It is to provide a large-sized back lighting device such as a signboard, a display, a display board, and a lighting panel that can be thinly formed.

  In accordance with the above-described problems, the present invention provides a light guide unit (also referred to as a light guide unit) that is divided into a plurality of large-sized illumination surfaces in a plane direction by a light guide panel and an LED light source that supplies incident light thereto. The illumination surface is formed by arranging the light guide units in the plane direction, while being integrated with the light guide unit, that is, the light output surface of the light guide panel via a separation space. A plurality of light guide units were used by arranging the milky white panel and performing back-lighting through the milky white panel, and by allowing the milky panel to be a supporting surface of the film to be illuminated in, for example, a signboard Therefore, it is possible to prevent the appearance of the seam between the light guide units and the line of the LED light source, which hinders uniformity, from appearing on the illumination surface. Ensures back lighting The area of the illumination surface can be freely set by increasing or decreasing the number of light guide units. That is, the invention according to claim 1 is directed to the light guide panel and at least one of the light guide panel and the light guide panel. A light guide unit formed by arranging LED light sources on both ends facing each other is arranged in parallel and / or in series in the surface direction to form an illumination surface of the light guide unit assembly, and a light guide panel on the illumination surface A large-sized back lighting device such as a signboard, a display, a display board, a lighting panel, and the like, wherein an integrated milky white panel is disposed so as to cover the entire surface of the light exiting surface through a separation space between the light exiting surface and the light exiting surface It is what.

  In the invention according to claim 2, instead of the integrated milky white panel, an integrated FF sheet (flexible face sheet) for illumination is disposed between the light exit surface and a spaced space in the same manner. In order to achieve the backlighting of the FF sheet that is as large as possible but has as high brightness as possible to ensure uniform illumination brightness, this is replaced with the integrated milky white panel as described above. The FF sheet is extended and arranged to provide a large-sized back lighting device such as a signboard, a display, a display board, and a lighting panel according to claim 1.

  According to the third aspect of the present invention, the luminance of each of the light guide units is made equal, thereby ensuring the uniformity of the luminance of the illumination surface and ensuring the illumination luminance as uniform as possible. In addition, by making the width between opposite ends of the light guide panel in which the LED light sources of the respective light guide units are arranged equal to each other, and making the luminance and the number of the LED light sources at both ends equal, The large-sized backside illumination device such as a signboard, a display, a display board, or an illumination panel according to claim 1 or 2, characterized in that the brightness of each of the above is equal.

  According to a fourth aspect of the present invention, the light guide panel width in the light guide unit ensuring uniform brightness is reduced to improve the illumination brightness, and the width is increased to reduce the illumination brightness. The above-mentioned LED light source is arranged so that the required brightness of the back lighting device is realized by adjusting the brightness required for the back lighting device by using the width of the light panel as the brightness adjusting means. The required brightness of the illumination surface is ensured by the brightness of the light guide unit set by adjusting the width of the light guide unit as the brightness adjustment means of the light guide unit as the brightness adjustment means of the light guide unit. Item 4 is a large-sized back lighting device such as a signboard, a display, a display board, and an illumination panel.

  The inventions according to claims 5 and 6 are characterized in that the invention according to claim 5 is preferably used as a large-sized back lighting device by stably and reliably arranging the light guide units. The unit is arranged on a bottom plate or a housing having the same area as the illumination surface, and is a large-sized rear illumination device such as a signboard, display, display plate, illumination panel or the like according to claim 1, 2, 3 or 4. The invention according to claim 6 is characterized in that the light guiding unit is arranged on a substrate or a case, respectively, and is arranged on a bottom plate or a housing having the same area as the illumination surface. 4. A large-sized back lighting device such as the signboard, display, display board, and lighting panel described in 4.

  According to a seventh aspect of the present invention, the LED light source is arranged on the crossing end face of the light guide panel end portion so that incident light is supplied from the LED light source to the light guide panel, and the light is guided by the provisional arrangement. The LED light source located between or near the units is covered with a semi-transparent material and dimmed to eliminate the obstruction of illumination brightness uniformity caused by the direct light of the LED light source, for example, due to the appearance of a band-like brilliant part. In order to ensure the uniformity of the illumination brightness, this is a temporary arrangement of the LED light source of the light guide unit, and the opposite ends of the light guide panel of the light guide unit intersect the light guide panel. The incident end face is provided with an LED chip so that the incident light is supplied to the light guide panel, and the illumination face side of the LED chip is covered with a translucent material such as a sheet or film to reduce the light. Signs of claim 2, 3, 4, 5 or 6, characterized in Rukoto, display, panel, in which a large-sized backlight unit, such as a lighting panel.

  According to an eighth aspect of the present invention, the LED light source is accommodated in an incident end surface having an L-shaped cross section at the end portion of the light guide panel, and is arranged so as to supply incident light from the LED light source to the light guide panel. In addition, the direct illumination of the LED light source is covered with a protrusion having an L-shaped cross section and dimmed by the provisional arrangement of the housing, and the illumination brightness is also caused by the appearance of, for example, a band-like bright part by the direct light of the LED light source. So that the uniformity of illumination luminance can be ensured by eliminating the obstruction of the uniformity of the light source, the temporary arrangement of the LED light sources of the light guide unit is opposed to the light guide panel of the light guide unit. Both ends are incident end surfaces having a L-shaped cross section with protrusions on the light exit surface side, and the LED chip is accommodated in the incident end surface to supply incident light to the light guide panel, and the illumination surface side of the LED chip is arranged on the illumination surface side. On the protrusion on the incident end face A large-sized back lighting device such as a signboard, a display, a display board, a lighting panel or the like according to claim 1, wherein the light-extinguishing measure is applied by covering the board. Is.

  The present invention uses each of these as the gist of the invention as means for solving the above problems.

  Since the present invention is configured as described above, the invention described in claim 1 is divided so that the large illumination surface is divided into a plurality of planes in the plane direction by the light guide panel and the LED light source for supplying incident light thereto. A light guide unit (which may also be referred to as a light guide unit) is used to form an illumination surface by arranging the light guide units in the plane direction, while the light output of the light guide unit, ie, the light guide panel. An integral milk panel is arranged between the screen and a space, and the back lighting is performed through the milk panel. For example, in a signboard, the milk panel can be used as a support surface of the film to be illuminated. By using a plurality of light guide units, it is possible to prevent the appearance of seams between the light guide units that impair uniformity and the lines of LED light sources on the illumination surface. Make it as bright as possible It is possible to provide a large-sized backlight unit that can be set freely the area of illumination plane by increasing or decreasing the number of light guide units while adapted to be without backlighting that ensures uniform illumination intensity.

  The invention described in claim 2 can be similarly large-sized by disposing an integrated FF sheet for illumination instead of the integrated milky white panel through a space between the light exit surface. The backlight of the FF sheet that can achieve high brightness and ensure uniform illumination brightness can be achieved.

  The invention described in claim 3 shall ensure uniform illumination brightness as much as possible by ensuring the uniformity of the brightness of the illumination surface by equalizing the brightness of each light guide unit. Can do.

  According to a fourth aspect of the present invention, the light guide panel width in the light guide unit ensuring uniform brightness is reduced to improve the illumination brightness, and the width is increased to reduce the illumination brightness. By using the width of the light panel as the luminance adjusting means, the luminance required for the backlighting device can be adjusted and ensured, and the required luminance of the backlighting device can be realized.

  The invention according to claims 5 and 6 can be preferably used as a large-sized back lighting device by stably and surely arranging the light guide units.

  According to a seventh aspect of the present invention, the LED light source is arranged on the crossing end face of the light guide panel end portion so that incident light is supplied from the LED light source to the light guide panel, and the light is guided by the provisional arrangement. By covering the LED light source located between the units with a semi-transparent material and dimming it, the uniformity of the illumination brightness caused by the appearance of, for example, a band-like bright part due to the direct light of the LED light source is eliminated, and the illumination brightness is reduced. Uniformity can be ensured.

  According to an eighth aspect of the present invention, the LED light source is accommodated in an incident end surface having an L-shaped cross section at the end portion of the light guide panel, and is arranged so as to supply incident light from the LED light source to the light guide panel. In addition, the direct illumination of the LED light source is covered with a protrusion having an L-shaped cross section and dimmed by the provisional arrangement of the housing, and the illumination brightness is also caused by the appearance of, for example, a band-like bright part by the direct light of the LED light source. Thus, the uniformity of illumination brightness can be secured.

  Hereinafter, the present invention will be described in more detail with reference to the examples of the drawings. In FIGS. 1 to 3, for example, A represents an illumination surface having a horizontal width of 3.3 m and a vertical length (height) of slightly over 2 m. A back-lighting device for large-sized signboards, displays, display panels, and the like having the light-lighting panel 12 and at least one opposite end of the light-guiding panel 12 and LED light sources 13 disposed on the opposite side. By arranging the light guide units 1 arranged in parallel and / or in series in the surface direction, an illumination surface of the light guide unit assembly is formed and a separation space 21 is formed between the light guide panel 12 and the light exit surface of the illumination surface. The integrated milky white panel 2 is arranged so as to cover the entire surface of the light exit surface, and at this time, each of the light guide units 1 is located between opposite ends of the light guide panel 12 on which the LED light source 13 is arranged. With the same width By equalizing the brightness and number of the LED light sources 13 at both ends, the brightness of each light guide unit 1 is made equal, and the light guide panel 12 has a width between opposite ends where the LED light sources 13 are arranged. , The required luminance of the illumination surface is secured by the luminance of the light guide unit 1 set by the width adjustment as the luminance adjustment means of the light guide unit 1.

  In the back lighting device A, the light guide unit 1 uses the light guide panel 12 having the same width and the same width so as to have the same brightness, and the LED light sources 13 having the same brightness and the same number. As a premise, the width of the light guide panel 12 is adjusted to be enlarged or reduced, that is, when the luminance of the light guide unit is insufficient, the width is reduced to improve the luminance, and when the luminance is excessive, the width is increased. By adjusting the luminance so as to decrease the luminance, the light guide unit 1 formed by setting the predetermined luminance of the light guide panel 12 according to the application is used to determine the illumination surface required for the back lighting device A. The set brightness is ensured. By adopting such a method for securing the set brightness, the width setting of the light guide panel 12 is set as the brightness adjusting means on the premise of the brightness and number of the LED light sources 13, and also in the back lighting device A having the same illumination surface, Considering the purpose of outdoor, indoor, and back lighting, etc., it is possible to easily and reliably realize and ensure different illumination brightness depending on the application.

  In the back lighting device A of this example, the vertical length (height) in the figure is slightly divided into three by adjusting the width between the opposing ends where the LED light source 13 is disposed, and the LED light source is not disposed. The total width of the light guide unit 1 is divided into three vertical and horizontal sections, each of which is divided into three horizontal widths of 3.3 m, taking into account the situation of planing, transportation, and installation work. Three light guide units 1 are arranged in parallel and in series in the surface direction. The light guide unit 1 has a lateral width of 104 cm, a vertical length of 67 cm, for example, and a thickness of 5 mm, which is as thin as possible. Each of the light guide panels 12 having the same area, planar rectangle having the same width, length, and thickness is used, and the light guide panel 12 is opposed to the long side of the above-mentioned 104 cm, that is, the figure. LED light sources 13 are respectively disposed on the upper and lower ends of the LED light source 1. In this case, the light guide unit 1 of this example is arranged on the substrate or the case 11 and the bottom plate 3 having the same area as the illumination surface is provided. It is assumed that it is arranged in the housing.

  The light guide panel 12 is formed by density modulation so that the light guide pattern, for example, the LED light source side is sparse and the center position between the LED light sources is dense, on an acrylic transparent plate according to a conventional method, and screen printing, injection molding or machining A light guide pattern (not shown) such as dots, hairlines, and meshes formed and arranged on the back surface of the acrylic transparent plate is provided.

  At this time, in the light guide unit 1 of this example, the LED light source 13 is disposed in an adjacent manner with the opposite ends of the light guide panel 12 of the light guide unit 1 as incident end surfaces 121 intersecting the light guide panel 12. An LED chip is provided on the end surface 121 to supply incident light to the light guide panel 12 and the illumination surface side of the LED chip is covered with a translucent material 131 such as a sheet or a film to reduce light. .

  In the present example, the incident end surface 121 of the light guide panel 12 is formed, for example, so as to be orthogonal to the light guide panel 12 and to form a vertical surface in the figure, while the LED chip is a high brightness chip. Are arranged on the chip substrate in a line in series in the longitudinal direction, and the chip substrate is fixed to the inner wall of the standing wall 111 of the case 11 by fixing means such as adhesion, and the incident end face of the light guide panel 12 is fixed. A number of high-luminance chips are arranged close to 121 in the longitudinal direction so as to supply uniform incident light over the entire length of the opposing long sides of the light guide panel 12.

  In this example, the case 11 of the light guide unit 1 is formed using a metal material that exhibits a heat radiation function, such as aluminum or steel, and the case 11 has an outer peripheral standing wall 111 that is thicker than the light guide panel 12. 5 mm of the lighting device intermediate arrangement with the U-shaped cross section of the upward opening and one or two upright standing walls 111 located on the outer peripheral side are set high, for example, 20 mm, and the other upstanding walls 111 are guided as described above. The light guide unit 13 is formed by accommodating the light guide panel 12 and the LED chip, respectively, by using two types of the light panel 12 having a wall thickness of 5 mm and having a cross-sectional shape with an upward opening. It is.

  At this time, the LED chip is exposed in the vicinity of the light guide unit 1 between the incident end face 121 of the light guide panel 12 and the inner wall of the case 11, and the direct light of the high brightness chip is emitted from the light guide panel 12. For example, a translucent material 131 such as a polyester milky white sheet or film is disposed so as to prevent the light from reaching the illumination surface and appearing on the illumination surface, for example, in the form of streaks. In this example, the arrangement of the translucent member 131 is arranged on, for example, the upper end of the standing wall 111 in the case 11 and the 20 mm standing wall in the case for the end of the lighting device. In this case, the semi-transparent material 131 is disposed so as to be bridged between the middle of 5 mm from the bottom surface of the standing wall and the width direction end of each light guide panel 12, thereby covering the LED chip. It is carried out.

  The nine light guide units 1 formed in this way are in this example, and the case 11 is made of a metal plate having the same heat dissipation function as the bottom plate 3 so that the upright walls 111 having a height of 5 mm are adjacent to each other. It is integrated with the bottom plate 3 by being mounted on the bottom plate.

  At this time, the integrated milk white panel 2 is fixed to the standing wall 111 of the case 11 for the end portion of the lighting device in which the standing wall 111 having a height of 20 mm is formed on the outer periphery, and the illumination surface is covered with the milk white panel 2. The milky white panel 2 is made to be a support surface of the illuminated film 4. The opalescent panel 2 is made of a light translucent material having a light diffusing function by adding a opacifying agent to acrylic, polyester or the like, or having a light diffusing function. The milk panel 2 in this example has a relatively thin wall thickness of about 2 to 5 mm, and the milk panel 2 in this example has a wall thickness of 3 mm.

  The milky white panel 2 is placed on and fixed to the front surface of the large-sized backlight device A, for example, through a separation space between the light guide unit 12 arranged in the plane direction and the light output surface of the light guide panel 12. Is coated. The separation space 21 is generally about 1 to 2 cm, and particularly preferably 0.7 to 2.5 cm. When the separation space 21 is less than about 1 cm, that is, less than 0.7 cm, The line of the LED light source is likely to appear on the illumination surface, leading to the possibility that the luminance uniformity of the illumination surface is impaired. On the other hand, when the separation space 21 exceeds about 2 cm, that is, 2.5 cm, light guide by the LED light source 13 is performed. The illumination light from the unit 1 does not reach the milky panel 2 sufficiently, leading to a possibility that the illumination brightness is lowered. Therefore, measures such as increasing the thickness of the light guide panel 12 and arranging the LED light sources 13 in a plurality of rows, etc. Which is uneconomical and results in an undesirable increase in thickness.

  In this example, the milky panel 2 is placed and fixed by forming an integrated panel seat 22 on the upright wall 111 surrounding the outer periphery of the lighting device by being positioned on the outer peripheral side of the case 11 for the end of the lighting device. Alternatively, it is installed so that the outer peripheral end of the milk panel 2 is supported on the panel seat 22. In this example, the milk panel 2 is placed on the panel seat 22 installed on the standing wall 111. Is fixed by fixing means such as bonding or screws. The maximum standard product of milk white panel, for example, milk white acrylic is 3.3 m × 2 m at present. Therefore, when the standard product is used, the backlight unit A has a maximum area of this size. If is a non-standard product, its size can be set freely.

  In the figure, reference numeral 5 denotes transparent, such as acrylic or polycarbonate, which is detachably installed on the milk panel 2 so that the illuminated film 4 supported on the milk panel 2 is sandwiched with the milk panel 2 as a support surface. It is a cover panel made of resin.

  The large-sized back lighting device A of this example can be a preferable form having high luminance and ensuring high uniformity as a whole. As a result, the space between the light output surface of the light guide panel 12 in the light guide unit 1 is separated. For example, when the separation space 21 is 1 cm, the illumination luminance is about 5% lower than the luminance of the light-emitting surface, and when the separation space 21 is 2 cm, the luminance is lowered by about 10%. As a result of measuring the luminance in the overlapped state, the illumination luminance of the milky white panel 2 through the 2 cm separation space of 2787 Lx (average luminance of 3 bodies) was 2524 Lx (same as above). Incidentally, in the direct illumination (internal illumination type) back illumination device having the same area as the large format illumination device A of this example, when a total of 29 40 W fluorescent tubes are arranged and used, the luminance is 3700 Lx. Yes, the power consumption is 1160 W, but the large-format lighting device A of this example is somewhat inferior in brightness, but its power consumption is 397 W / H, so the power consumption is reduced to about 1/3 of energy saving. Can be.

  FIGS. 4 and 5 show other examples. In this example, the large-sized back lighting device A has an illumination surface with a horizontal width of 3 m and a vertical length (height) of just over 1.5 m, for example. In this example, the rear illumination A has two light guide units 1 each having two divided illumination surfaces arranged in parallel in the plane direction. At this time, the light guide unit 1 uses a light guide panel 12 having a rectangular shape in which the vertical length of the illumination surface is divided into two, the horizontal width is 3 m, the vertical length is 0.75 m, and the wall thickness is 10 mm. The light source panel 12 is formed by disposing LED light sources 13 and LED chips on the left and right ends of one opposing long side in the drawing and similarly housing the case 11 in the same manner. Through the housing, in this example, the light guide unit 1 is accommodated in the bottom plate 3, while the back-lighting device A is defined as 15 mm which is reduced by 5 mm from the above example in the separation space 21.

  At this time, in the present example, the temporary arrangement of the LED light source 13 of the light guide unit 1 is a cross section in which protrusions are arranged on the light exit surface side at the opposite ends of the light guide panel 12 of the light guide unit 1. An L-shaped incident end surface 121 is provided, and an LED chip is accommodated and provided on the incident end surface 121 to supply incident light to the light guide panel 12, and the illumination surface side of the LED chip is covered by the protrusion of the incident end surface 121. As a result, the light has been reduced.

  That is, the light guide panel 12 of this example is thicker than the thickness of the above example, for example, about 1 cm, that is, 0.8 to 1.2 cm of extrusion molding or injection molding, and post-processing after the molding, The left and right ends have an L-shaped cross section in which stepped walls are inclined so as to form a slightly S shape in the present example, with downward openings to accommodate the LED chip's protruding width. Similarly, an incident end face 121 is formed, and in this example, the chip substrate is fixed to the inner wall of the upright wall 111 on the adjacent side according to the thickness of the light guide panel 12 to accommodate and arrange the chip substrate. Similarly, the backlight device A is provided. Since the remainder is not different from the above example, the same reference numerals are assigned and redundant description is omitted.

  FIG. 6 shows still another example. In this example, the large-sized back lighting device A replaces the integrated milky white panel 2 that forms the support surface of the film to be illuminated 4 and is integrated with the object to be illuminated. It is assumed that the FF sheet 6 is extended and arranged.

  The FF sheet 6 is made of non-flammable glass fiber or made of flame retardant vinyl chloride, and is printed from the light guide panel 12 in the light guide unit 12 using, for example, an inkjet print. Are arranged so as to cover the entire surface of the light-emitting surface with a spacing 21 of about 1 to 2 cm. For example, the FF sheet 6 is extended and formed in the same manner as described above by forming or installing a seat seat 61 on the standing wall 111 surrounding the outer periphery of the case 11 for the end of the lighting device. This is done by fitting the sheet pressing bar 62 into the arranged groove and sandwiching the outer peripheral end of the FF sheet 6 stretched by the groove and the bar 62 into the groove. Since the remainder is the same as the example of FIG. 1 to FIG. 3 described above, the same reference numerals are assigned and redundant description is omitted.

  These examples of FIGS. 4, 5, and 6 can also be made preferable as the large-sized back lighting device A by increasing the brightness and the uniformity as described above.

  Although the illustrated example is as described above, it is assumed that the LED light source is an LED lamp, that the LED light source is disposed on both opposite sides of the light guide panel, that is, on the outer periphery of the four sides. As long as the brightness can be uniformized by adjusting the light guide pattern, the distance of the LED light source so as to equalize the luminance due to the incident light from the peripheral LED light source, for example, opposite opposite ends of the light guide panel in which the LED light source is arranged A light guide unit is formed with different widths and different brightness and / or number of LED light sources depending on the width of the light guide panel, and the light guide unit is disposed on the bottom plate or the housing. The housing has a U-shaped cross-section with a standing wall on the outer periphery, and the milky white panel is placed and fixed on a panel seat installed in the housing, LED light In order to apply a light reduction measure by covering the illumination surface side with a translucent material, use a narrow translucent plate instead of a sheet or film, and install a large back lighting device on a wall, ceiling, etc. In carrying out the present invention, including use as a lighting panel that is arranged and illuminated, a large-format back lighting device, a light guide unit, a light guide panel, an LED light source, a milk white panel, a remote space, as required FF sheet, bottom plate or housing of lighting device, light guide unit substrate or case, incident end face, translucent material, etc., specific use, structure, shape, material, relationship between these, addition to these, etc. Various forms can be employed as long as the gist of the invention is not violated.

It is a disassembled perspective view which shows the outline | summary of the member of a large format back illuminating device. It is a top view which shows the light guide unit arrangement | positioning state of a large format back illuminating device. FIG. 3 is a longitudinal sectional view taken along line AA in FIG. 2. It is a top view which shows the light guide unit arrangement | positioning state of the large sized back illuminating device of another example. It is a longitudinal cross-sectional view of the large format back illuminating device of FIG. It is a longitudinal cross-sectional view of the large format back surface illuminating device using a FF sheet.

Explanation of symbols

A Large-sized back illumination device 1 Light guide unit 11 Case 111 Standing wall 12 Light guide panel 121 Incident end face 13 LED light source 131 Translucent material 2 Milky panel 21 Separation space 22 Panel seat 3 Bottom plate 4 Illuminated film 5 Cover panel 6 FF sheet 61 Seat rest 62 Seat presser bar

Claims (8)

  An illumination surface of the light guide unit assembly is formed by arranging light guide units formed by arranging LED light sources on both ends facing at least one of the light guide panel in parallel and / or in series in the surface direction. And a sign board, a display, a display board, wherein an integral milk panel is disposed so as to cover the entire surface of the light exiting surface through a separation space between the light guide panel and the light exiting surface of the illumination surface. Large format back lighting equipment such as lighting panels.   2. A large-format backside illumination device such as a signboard, a display, a display board, and an illumination panel according to claim 1, wherein an integral FF sheet for illumination is extended and arranged instead of the integral milky white panel.   By equalizing the width between opposite ends of the light guide panel in which the LED light sources of each light guide unit are arranged, and making the brightness and number of the LED light sources at both ends equal, the brightness of each light guide unit is made equal. A large-format backside illumination device such as a signboard, a display, a display board, or an illumination panel according to claim 1 or 2.   The required brightness of the illumination surface is ensured by the brightness of the light guide unit set by adjusting the width of the light guide unit as the brightness adjustment means of the light guide unit, with the width between opposite ends of the light guide panel in which the LED light source is disposed. A large-format backside illumination device such as a signboard, a display, a display board, and an illumination panel according to claim 3.   The large-sized back surface of a signboard, display, display plate, lighting panel, etc. according to claim 1, wherein the light guiding unit is arranged on a bottom plate or a housing having the same area as the lighting surface. Lighting device.   5. The signboard, display, or display board according to claim 1, 2, 3, or 4, wherein the light guide unit is arranged on a base plate or a housing having the same area as an illumination surface by arranging the light guide unit on a substrate or case, respectively. , Large format backlighting devices such as lighting panels.   The light source unit LED light source is arranged side by side at the opposite end of the light guide unit light guide panel as an incident end face intersecting the light guide panel, and the LED chip is provided on the incident end face to the light guide panel. The incident light is supplied and the illumination surface side of the LED chip is covered with a translucent material such as a sheet or a film to reduce the light. A large-format backside lighting device such as the signboard, display, display board, or lighting panel according to 6.   The temporary arrangement of the LED light source of the light guide unit is an L-shaped incident end face in which the opposite ends of the light guide panel of the light guide unit are arranged on the light exit surface side, and an LED chip is provided on the incident end face. The incident light is supplied to the light guide panel, and the illumination surface side of the LED chip is covered with a protrusion on the incident end surface to reduce the light. , 3, 4, 5 or 6, large-format backside lighting devices such as a display, a display panel, and a lighting panel.

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