JP2014032265A - Illuminated light display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat illuminated light display device that can switch over at least two or more display bodies.SOLUTION: An edge light method is configured to overlap and laminate a first display body 3, a second display body 4 and a third display body 5 in which diffusion printings 33, 43 and 53, a transparent layer 34 covering the diffusion printing 33 and the back surface of a light guide plate 32 and a transparent layer 44 covering the diffusion printing 43 and the back surface of a light guide plate 42 are provided on back surfaces of light guide plates 32, 42 and 52 having light sources 31, 41 and 51 provided at edges. The diffusion printings 33, 43 and 53 have reflectance of 10 to 40% and transmission of 60 to 90%, and by switching over the light source among the light sources 31, 41 and 51, the display body to be displayed is changed.

Description

  The present invention relates to an edge light type illumination display device which can be switched between display bodies and used for portable electronic devices, signboards, billboards and the like.

  An edge light type illumination display device is used as a display device for displaying a guide sign such as a signboard or an advertising board, or as an icon display device in a portable electronic device such as a PDA (for example, see Patent Document 1).

  By the way, when an edge light type illumination display device is used for guide sign display or the like, it may be required that a plurality of display bodies can be switched and displayed. At that time, a structure in which a plurality of light guide plates and LEDs are stacked is taken, and eventually, there is a problem that the illumination display device becomes thick and the visibility of the display body installed in the deep part of the illumination display device decreases. .

  For example, two light guide plates having translucency are overlapped, a reflective layer or a separation layer is provided between the light guide plates, the light source is taken on the side of the overlapped light guide plate, and other than the light source surface of the overlapped light guide plate A reflective layer is provided on the side, and characters, designs, etc., are printed on the overlapping surfaces of the light guide plates with ink containing diffuse reflection characteristics. Has been proposed (see, for example, Patent Document 2).

US Patent Application Publication No. 2012/0061217 (A1) Specification JP 2004-226437 A

  However, in the display device disclosed in Patent Document 1, it is possible to display two display bodies, but in order to display three or more, a complicated structure is required. Further, in the method disclosed in Patent Document 2, it is conceivable to arrange a light shielding film between the display bodies so as to prevent double reflection of the laminated display bodies. An increase in thickness is inevitable.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a thin illuminated display device capable of switching at least two or more display bodies.

  Such an object is achieved by the present invention described below.

  A feature of the illuminated display device of the present invention is that a display body provided with diffusion printing and a transparent layer covering the diffusion printing and the back surface of the light guide plate on the back surface of the light guide plate provided with a light source at an end portion is stacked. The edge-light method is a layered edge light method, in which diffusion printing has a reflectance of 10 to 40% and a transmittance of 60 to 90%, and the display body is changed by switching the light source. To do.

  By providing diffusion printing and a transparent layer that covers the back side of the light guide plate, the emission intensity of the light emitted from the light source can be increased, and further the light can be carried far, but this transparent layer is formed by printing Thinning can be realized.

  By providing a light attenuating layer having a transmittance of 3 to 85% or an air layer between a plurality of laminated display bodies, it is possible to make it difficult to see the display on the back side as viewed from the front.

  The light attenuation layer can be formed by performing colored smoke printing on at least one surface of the light guide plate. Printing for lowering transparency using black, brown or color ink is called smoke printing, and black, brown or color film with low transparency is called smoke film.

  The light attenuation layer can also be formed by performing smoke printing on at least one surface of the light guide plate with a material having a refractive index lower than that of the light guide plate.

  Alternatively, the light attenuating layer can be formed by printing or coating a material having a lower refractive index than that of the light guide plate on at least one surface of the light guide plate, and forming a metal or metal compound thereon by printing or vapor deposition.

  If a reflection layer is provided on the end surface of the outer periphery of the light guide plate excluding the region of the end portion of the light guide plate that faces the position of the light source, the light emitted from the light source can be evenly distributed throughout the light guide plate. The light emitted from the light source can be used without loss, improving the brightness or reducing the number of light sources and contributing to energy saving.

  By providing a colored smoke film with a transmittance of 3 to 70% or a colored smoke printed film with a transmittance of 3 to 70% on the outermost surface of the display layer laminated in multiple layers, characters, designs, etc. printed on each display body, The appearance at the time of lighting and non-lighting can be improved.

  According to the present invention, it is possible to provide a thin illuminated display device capable of switching between at least two display bodies.

(A) It is typical sectional drawing which shows the structure of the illumination display apparatus which concerns on embodiment of this invention. (B) It is sectional drawing which shows the structure of the display body which concerns on embodiment of this invention. It is sectional drawing of the display body which consists of 3 layers of the illuminated display apparatus which concerns on Example 1 of embodiment of this invention. (A) It is a schematic plan view which shows the display of the remote control for illumination of the display body of the 1st layer of the remote control to which the illumination display apparatus which concerns on Example 1 of embodiment of this invention is applied. (B) It is a schematic top view which shows the display of the remote control of DVD of the display body of the 2nd layer of the remote control to which the illumination display apparatus which concerns on Example 1 of embodiment of this invention is applied. (C) It is a schematic top view which shows the display of the remote control of the television of the display body of the 3rd layer of the remote control to which the illumination display apparatus which concerns on Example 1 of embodiment of invention is applied. It is sectional drawing of the display body which consists of two layers of the illuminated display apparatus which concerns on Example 2 of embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. In addition, the dimension of drawing does not represent an actual size, in order to show a structure clearly.

  First, the configuration of the illuminated display device of the present invention will be described. Fig.1 (a) is typical sectional drawing which shows the structure of the illuminated display apparatus which has a display body which consists of three layers based on embodiment of this invention. FIG.1 (b) is sectional drawing which shows the structure of the display body of a single layer based on embodiment of this invention. FIG. 2 is a cross-sectional view of a three-layered display body of the illuminated display device according to Embodiment 1 of the present invention.

  As shown in FIG. 1A, the third display body 5, the second display body 4, the first display body 3, and the smoke film 6 are laminated in this order on the substrate 2, and as a light source, The LED 51 is disposed at the end of the third display body 5, the LED 41 is disposed at the end of the second display body 4, and the LED 31 is disposed at the end of the first display body 3. A plurality of LEDs may be arranged at the end of each display body. Each of the LEDs 51, 41, 31 is arranged and fixed in advance at a predetermined position on the substrate 2. In addition, although the case where LED was used as a light source was described here, it is not necessary to be limited to LED, for example, a cold cathode tube, a neon lamp, a fluorescent lamp, etc. may be adopted. The interlayers of the substrate 2, the third display body 5, the second display body 4, the first display body 3, and the smoke film 6 are bonded with a double-sided tape or the like to constitute the illuminated display device 1.

  As shown in FIG. 1 (b), the first display 3 covers the diffusion print 33 such as characters and designs formed on the lower surface of the light guide plate 32, and the lower surface of the light guide plate 32 and the diffusion print 33. The transparent layer 34 printed in this manner, and the smoke print 35 printed on the lower surface of the transparent layer 34.

  As shown in FIG. 2, the 3rd display body 5 which consists of the light-guide plate 52 and the diffusion printing 53 is adhere | attached on the board | substrate 2 with the double-sided tapes 75a and 75b. The second display body 4 composed of the light guide plate 42, the diffusion printing 43, the transparent layer 44, and the smoke printing 45 is bonded to the third display body 5 with double-sided tapes 74a and 74b. The 1st display body 3 which consists of the light-guide plate 32, the diffusion printing 33, the transparent layer 34, and the smoke printing 35 is adhere | attached on the 2nd display body 4 with the double-sided tapes 73a and 73b. The smoke film 6 is bonded to the first display body 3 with double-sided tapes 76a and 76b. Here, the double-sided tapes 73a, 73b, 74a, 74b, 75a, 75b, 76a, and 76b are all the first to third display bodies 3, 4, 5 and the smoke film from the viewpoint of providing an air layer with a spacer. 6 is arranged on the outer periphery between each of the six.

  As the light guide plates 32, 42, 52, transparent materials such as acrylic, polycarbonate, styrene, styrene copolymer, AS resin, ABS resin, cycloolefin, PVC, epoxy resin, silicone, polyester, PVA, TAC, glass, etc. Can be used.

  The diffusion prints 33, 43, and 53 containing the diffuse reflection characteristics are formed by printing a pattern of the diffusion ink by a method such as screen printing, offset printing, letterpress printing, and ink jet printing. As diffusion inks, diffusion materials such as silica, titanium oxide, mica, glass beads, synthetic resin beads such as acrylic and styrene, and binder materials, acrylic resins, polyester resins, epoxy resins, vinyl resins In addition, a resin dispersed in a binder such as urethane resin, silicone resin, or a mixture thereof can be used.

  The diffusion prints 33, 43, and 53 must have appropriate reflectance and transmittance as diffuse reflection characteristics. Table 1 shows light having a wavelength of 550 nm when the ink shown in the table is printed to a thickness of 8 to 15 μm on a polycarbonate (PC) substrate having a thickness of 0.2 mm (trade name “Panlite PC2151” manufactured by Teijin Chemicals Ltd.). It shows the result of measuring the reflectance and transmittance for the.

  From the results shown in Table 1, in order to ensure the transmittance of 60 to 90%, the reflectivity is suitably in the range including the reflectivity of CRI-OVER001 and the reflectivity of LDA / LD, that is, 10 to 40%. It can be seen that it is. Here, when the transmittance is less than 60%, there is a problem that printing is reflected when the panels are overlapped.

  For the purpose of increasing the emission intensity and carrying light far, the transparent layer 34 is printed covering the lower surface of the diffusion printing 33 and the light guide plate 32, and the transparent layer 44 is printed covering the lower surface of the diffusion printing 43 and the light guide plate 42. ing. As materials for forming the transparent layers 34 and 44, acrylic, polycarbonate, styrene, styrene-based copolymer, AS resin, ABS resin, cycloolefin, PVC, epoxy resin having a lower refractive index than the material of the light guide plates 42 and 43, Transparent resins such as silicone, polyester, PVA, and TAC can be used. By providing the transparent layers 34 and 44, light leakage from the smoke layers 35 and 45 can be prevented.

  The diffusion prints 33, 43, and 53 are formed with different pattern displays. When the LED 31 is caused to emit light and the pattern of the diffusion print 33 of the first display body 3 is displayed, the pattern of the diffusion print 43 of the second display body 4 and the pattern of the diffusion print 53 of the third display body 5 are made difficult to see. In addition, smoke prints 35 and 45 are provided as light attenuation layers. The transmittance of the smoke prints 35 and 45 as the light attenuation layer is preferably 3 to 85%, and more preferably 10 to 75%. With respect to the upper limit value, if the transmittance of the smoke prints 35 and 45 is 85% or less, the shielding effect of the pattern of the diffusion print 53 and the pattern of the diffusion print 43 is clearly recognized. As the number of display layers increases, the number of smoke prints as the light attenuating layer also increases, so the display pattern when the display near the substrate is displayed becomes darker, so the transmittance of smoke print is finely adjusted. It will be necessary. Moreover, if it is 75% or less, the shielding effect of a diffusion printed pattern will arise further. On the other hand, when it exceeds 85%, the shielding effect is weakened, and a hindrance that a hidden pattern is visible occurs. If the lower limit is 3% or more, the visibility during illumination is good. Moreover, if it is 10% or more, the brightness at the time of illumination will become brighter. On the other hand, if it falls below 3%, the contrast of the display is reduced, and there is a problem that it becomes difficult to see the display in a bright place.

  The smoke print 35 as the light attenuating layer is formed on the transparent layer 34, and the smoke print 45 is formed on the transparent layer 44 by a method such as screen printing, offset printing, letterpress printing, and ink jet printing. Printing materials include acrylic, polycarbonate, styrene, styrene-based copolymer, AS resin, ABS resin, cycloolefin, PVC, epoxy resin, silicone, polyester, PVA, TAC, and other transparent resins such as carbon, organic pigments, dyes, and metals. What mixed powder and metal compound powder can be used, and a film thickness is decided by the transmittance | permeability and a mixture ratio.

  As the light attenuating layer, it is also effective to form a half mirror by a vapor deposition method of a metal or metal compound such as gold, copper, tin, indium, or aluminum. In the present embodiment, the case where the light attenuation layer and the transparent layer are disposed below the light guide plate has been described by way of example. However, the positional relationship of the light guide plate with respect to the light attenuation layer and the transparent layer is the surface side ( It may be the upper side in the figure.

  As shown in FIG. 2, an air layer 9 is provided between the layers of the display body 5, the display body 4, the display body 3, and the smoke film 6. This air layer is effective in making it difficult to see the diffusion-printed characters and the like of the lower display body close to the non-illuminated substrate when the upper display body is illuminated.

  The display switching of the display bodies 3, 4, and 5 by switching the LEDs 31, 41, and 51 may be performed manually by a switch or automatically by an IC depending on the application.

  As an application example of the illuminated display device of the present invention, a remote control embodiment 1 will be described with reference to FIGS. 2 and 3, and a store signboard embodiment 2 will be described with reference to FIG.

Example 1
In the cross-sectional configuration shown in FIG. 2, a 0.2 mm thick transparent resin substrate made of polycarbonate resin (trade name “Panlite” manufactured by Teijin Kasei Co., Ltd., refractive index 1.58) is applied to the light guide plate 32 with diffusion ink (Chemrich With the product name “CRI-OVER001” manufactured by the company, pattern printing of the first display 3 as the first display was performed and dried in an oven at 60 ° C. for 15 minutes to obtain diffusion printing 33 having a film thickness of 8 μm.

  Next, a UV acrylic resin having a refractive index of 1.49 (trade name “UV-5410” manufactured by Seiko Advance Co., Ltd.) having a refractive index of 14.9 was printed on the diffusion printing 33 and UV cured to obtain a transparent layer 34 having good leveling properties. Furthermore, transparent ink (trade name “SG-740 Medium” manufactured by Seiko Advance Co., Ltd.) and black ink (trade name “SG-740 765 Process Black” manufactured by Seiko Advance Co., Ltd.) are mixed at a ratio of 100: 10. Printing was performed using the created ink to obtain smoke print 35 having a transmittance of 65%.

  Similarly, the second display body 4 as the second display also prints the diffusion printing 43 and the transparent layer 44 having different designs on the light guide plate 42 made of a transparent base material having a thickness of 0.2 mm, and the density of the smoke printing 45 is increased. The transmittance was adjusted to 75% and printed. Since the third display body 5 as the third display is the lowermost surface, the transparent layer and the smoke layer were not provided, and only the diffusion printing 53 having a different design was printed.

  The laminated body of the third display body 5, the second display body 4, and the first display body 3 was set with the double-sided tapes 75a and 75b on the substrate 2 on which the LEDs 31, 41 and 51 were arranged and fixed at predetermined positions. Since the diffusion prints 33, 43, and 53 are displayed in an overlapping manner, an air layer 9 is provided between the layers so as to make it difficult to see the characters in the lower layer, thereby reducing glare and interface transmittance due to interface reflection. Therefore, the outer peripheral part of the 1st display body 3, the 2nd display body 4, and the 3rd display body 5 was adhere | attached with the double-sided tape 73a, 73b, 74a, 74b. Also, a smoke film 6 (125 μm thick PET, an organic pigment mixed with a binder and coated so as to have a transmittance of 43%) is adhered to the outermost surface with double-sided tape 76a and 76b, and an illumination display device 1 was completed.

  As shown in FIGS. 3A to 3C, the illuminated display device 1 thus obtained has a first display as an illumination display, a second display as a DVD remote control display, and a third display. The display can be switched by changing the switch so that the display becomes the remote control display of the television.

(Example 2)
In the cross-sectional configuration shown in FIG. 4, a diffusion ink (trade name “CRI-” manufactured by Chemrich Co., Ltd.) is applied to the light guide plate 32 made of PMMA (trade name “Acrylite” manufactured by Mitsubishi Rayon Co., Ltd., refractive index 1.49) having a thickness of 2 mm. 001 "), pattern printing of the first display 3 as the first display was performed, and dried in an oven at 60 ° C for 15 minutes to obtain a diffusion printing 33 having a film thickness of 8 µm.

  Next, a UV acrylic resin having a refractive index of 1.49 (trade name “UV-5410” manufactured by Seiko Advance Co., Ltd.) having a refractive index of 14.9 was printed on the diffusion printing 33 and UV cured to obtain a transparent layer 34 having good leveling properties.

  Next, a silane coupling agent 36 (trade name “KBM-403” manufactured by Shin-Etsu Chemical Co., Ltd., refractive index: 1.43) is thinly applied to the upper surface of the light guide plate 32, dried, and then the first display as the first display. The blank character print 8 offset by +1 mm in the display range of the body 3 and the second display body 2 as the second display was printed in black.

  Next, the printing pattern of the second display body 4 as the second display is printed on the light guide body 42 made of a transparent base material with the diffusion ink to form the diffusion printing 43, and the silane coupling agent 46 ( After thinly applying Shin-Etsu Chemical Co., Ltd. trade name “KBM-403”, refractive index 1.43), drying, transparent ink (Seiko Advance Inc. trade name “SG-740 Medium”) and black ink (Seiko Advance Inc.) Smoke printing 45 having a transmittance of 75% was formed using an ink prepared by mixing a product name “SG-740 765 Process Black”) at a ratio of 100: 5.

  The laminated body of the second display body 4 and the first display body 3 is set with the double-sided tapes 74a and 74b on the substrate 2 on which the LEDs 31 and 41 are arranged and fixed at predetermined positions, and the first display body 3 and the second display body. 4 was bonded with double-sided tape 73a, 73b. Also, a smoke film 6 (125 μm thick PET, an organic pigment mixed in a binder and coated so as to have a transmittance of 35%) is adhered to the outermost surface with double-sided tape 76a, 76b, and an illumination display device 1 was completed. It has been confirmed that the illuminated display device 1 can display the appearance of the character when lit or not lit, such as “OPEN” ⇔ “CLOSE”.

(Comparative Example 1)
The diffusion ink of Example 1 (trade name “CRI-OVER001” manufactured by Chemrich) was changed to a diffusion ink having a different performance (tradename “LDA / LT” manufactured by Chemrich), and a product was produced in the same process. The reflectivity of the printing ink was low, and the surrounding contrast at the time of lighting was not obtained, which was difficult to see.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The present invention can be applied to a display device for displaying a guide sign such as a signboard or an advertising board, an icon display device in a portable electronic device, and a remote control operation button display device in an electric device or electronic device.

DESCRIPTION OF SYMBOLS 1 Illuminated display apparatus 2 Board | substrate 3 1st display body 4 2nd display body 5 3rd display body 6 Smoke film 8 Blank character printing 9 Air layer 10 3 layer display body 20 2 layer display bodies 31, 41, 51 Light source (LED)
32, 42, 52 Light guide plate 33, 43, 53 Diffusion printing 34, 44 Transparent layer 35, 45 Smoke printing 73a, 73b, 74a, 74b, 75a, 75b, 76a, 76b
Double-sided tape

Claims (7)

Edge light type illumination display in which a plurality of display bodies each provided with diffusion printing and a transparent layer covering the rear surface of the light guide plate are stacked on the back surface of the light guide plate having a light source at the end. A device,
The diffusion printing has a reflectance of 10 to 40% and a transmittance of 60 to 90%,
An illumination display device, wherein a display body to be displayed is changed by switching the light source.   2. The illumination display device according to claim 1, wherein a light attenuation layer or an air layer is provided between the display bodies laminated in a plurality of layers, and the light attenuation layer has a transmittance of 3 to 85%.   The illumination display device according to claim 2, wherein the light attenuation layer is formed by performing colored smoke printing on at least one surface of the light guide plate.   The illumination display device according to claim 3, wherein the light attenuation layer is formed by performing smoke printing on a material having a refractive index lower than that of the light guide plate on at least one surface of the light guide plate.   The illumination display device according to claim 2, wherein the light attenuation layer is formed of a material having a refractive index lower than that of the light guide plate on at least one surface of the light guide plate, and a metal or a metal compound is provided thereon.   6. The reflection layer is provided on an end surface of the outer periphery of the light guide plate except for an end region of the light guide plate corresponding to the position of the light source. Illuminated display device.   The illuminated display device according to any one of claims 1 to 6, wherein a colored smoke film having a transmittance of 3 to 70% is provided on the outermost surface of the display body laminated in a plurality of layers.

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