JP2011065116A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display which is clearly visualized by viewers by light-emitting a display section even in the dark or during a blackout at night, and which is excellent in power saving property. <P>SOLUTION: The display includes: a display plate 4 composed of a rainproof and light-resistant transparent acrylic plate and having an opaque display section 3 either on the surface or rear face; a luminous sheet 5 which is just mixed with a luminous agent and does not have a concealment layer, and provided on the rear face of the display plate 4; an opal plate 6 which is provided on the rear face of the luminous sheet 5 and transmits light while uniformly diffusing it; a light guide plate 7 provided on the rear face of the opal plate 6; LED lights 8, 8 disposed on the rear face position of the light guide plate 7 and irradiating the luminous sheet 5 with light with a lithium battery, a solar battery, or the like as a power generation source; and a specular reflection plate 9 provided on the rear side of the LED lights 8, 8 and the light guide plate 7 and having a layer function of concealing the luminous sheet 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device that is used for an evacuation guide sign, various signboards, and the like, and has a function that can be clearly seen even in a dim place such as at night.

  2. Description of the Related Art Conventionally, there has been known a display device including a display body made of a phosphorescent material so that an evacuation guide sign or various signs can be displayed even in a dim place such as at night. The phosphorescent material has a function of absorbing and accumulating external light, and then self-emitting the accumulated light in the dark after the accumulation.

  However, although the phosphorescent material absorbs and accumulates sunlight during the day, the accumulated light is emitted in a short time together with the sunset that has begun to darken. For this reason, there is always a need for light such as a fluorescent lamp near the display. For example, if the light such as a fluorescent lamp is turned off or the power is cut off at night, the light accumulated in the phosphorescent material is still emitted in a short time. It was something to end up with. As a result, during a power outage in the dark or at night, there is almost no light emission from the phosphorescent material, making it impossible to clearly recognize the display, and the original functions of evacuation guidance signs and various signs cannot be performed. Was.

  In view of the above, an object of the present invention is to provide a display device that can make a display portion emit light even in the dark or during a power outage at night and can be clearly seen by a viewer and is excellent in power saving.

  In order to solve the above-described problem, the invention according to claim 1 of the present application includes a display plate 4 made of a transparent acrylic plate having rain resistance and light resistance, and having an opaque display portion 3 on one of the front surface and the back surface, and the display plate. 4, a phosphorescent sheet 5 simply mixed with a phosphorescent agent having no concealing layer, a milky white plate 6 that is provided on the rear surface of the phosphorescent sheet 5 and transmits light while being uniformly dispersed, and a milky white plate A light guide plate 7 provided on the back surface of the light guide plate 6, LED lights 8, 8 disposed at the back surface position of the light guide plate 7 and irradiating light to the phosphorescent sheet 5 using a lithium battery or a solar battery as a power generation source; , 8 and a mirror reflection plate 9 provided on the back side of the light guide plate 7 and having a function of a concealing layer of the phosphorescent sheet 5, and the light emitted from the LED lights 8, 8 is passed through the light guide plate 7 and the milky white plate 6. Phosphorescence Together directly backside illumination to over preparative 5, characterized in that as by irradiating the phosphorescent sheet 5 and a large amount of phosphorescent uniform shape in phosphorescent sheet 5 with uniform light upon milky plate 6.

  In the invention according to claim 2 of the present application, the LED lights 8 and 8 according to claim 1 described above are alternately turned on for 1 minute and turned off for 30 minutes at least in the dark or at night. It is characterized by being set to.

  According to the present invention, the light emitted from the LED lights 8, 8 with the above-described configuration can be efficiently and directly irradiated to the phosphorescent sheet 5 via the light guide plate 7 and the milky white plate 6, and the milky white plate. 6 can irradiate the phosphorescent sheet 5 while making the light uniform, whereby the phosphorescent sheet 5 can store a uniform amount and a large amount of light. As a result, the lighting time of the LED lights 8, 8 can be suppressed to a very short time, and the light storage secured in a large amount in the light storage sheet 5 can be emitted for a long time while maintaining a predetermined brightness or more. Therefore, the display part 3 of the display board 4 can be clearly visually recognized by the light emission of the phosphorescent sheets 5 and 5 by sunlight in the daytime, and a rechargeable battery or a solar cell is used as the power generation source 12 in the dark or at night. Due to the light emission of the phosphorescent sheets 5 and 5 by repeating intermittent lighting and extinguishing of the LED lights 8 and 8, the display unit 3 of the display panel 4 is lit up from behind, and the display unit 3 of the display panel 4 is in the dark. It can be clearly seen even during a power outage at night and is excellent in power saving.

  Further, even if the LED lights 8 and 8 are set to be alternately turned on and off for a very short time in the dark or at night, the phosphorescent sheet 5 is made to emit light sufficiently even if it is set to alternately turn off for 30 minutes. Is clearly visible, and is particularly excellent in power saving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a display device according to the present invention. The display device 1 is composed of a case main body 2 and a transparent acrylic plate having rain and light resistance provided in the upper portion 2a of the case main body 2 and is opaque on the surface. A display plate 4 having a display unit 3, a thick phosphorescent sheet 5 containing a phosphorescent agent without a concealing layer provided on the back surface of the display plate 4, and provided on the back surface of the phosphorescent sheet 5 and transmitting light The milky white plate 6 that is transmitted while being uniformly dispersed, the light guide plate 7 provided on the back surface of the milky white plate 6, and the phosphorescent sheet 5 disposed at the back surface position of the light guide plate 5 and using a lithium battery or a solar cell as a power source. LED lights 8, 8 that directly irradiate light, a mirror reflector 9 that is provided on the back side of the LED lights 8, 8 and the light guide plate 7 and has a concealing layer function of the phosphorescent sheet 5, and a mirror reflector 9 Holding provided on the back of the 10, and a power source 12 such as a Lithium battery or solar cells are connected via a suitable connection means such as sockets 11, 11 to the LED lights 8,8 provided in the lower portion 2b of the case body 2.

  As for the display board 4, the opaque display part 3 which consists of arbitrary figures, characters, etc. (for example, the sign for evacuation guidance) is formed by printing etc. on the transparent film or the transparent board, for example. Since the display unit 3 does not transmit light, the viewer can recognize the display unit 3 even in the dark by transmitting light to the remaining part of the display panel 4 other than the display unit 3. The display unit 3 may be formed by application, thermal transfer, pasting, or the like in addition to printing. Further, as shown in the figure, the display unit 3 may be provided on the back surface of the display plate 4 in addition to the surface of the display plate 4.

  The phosphorescent sheet 5 is formed of a thick sheet appropriately mixed with a phosphorescent agent, and the phosphorescent sheet 5 itself receives light from the back side directly so that a large amount of light can be effectively stored. Does not have a cover layer.

  The milky white plate 6 is a mixture of acrylic resin and titanium powder, and has a function of irradiating the phosphorescent sheet 5 with light from the LED lights 8 and 8 evenly dispersed while having light transmittance. is doing.

  The light guide plate 7 is made of a transparent plate having good light transmissivity, such as an acrylic resin plate, a polycarbonate light guide plate, and an optical glass plate. The mirror plate 9 is made of an aluminum vapor deposited resin film or sheet.

  The display plate 4, the phosphorescent sheet 5, the milky white plate 6, the light guide plate 7, the LED lights 8 and 8, the specular reflection plate 9, and the holding body 10 are placed on the upper part 2 a of the case body 2 via the aluminum holding plates 14 and 14. The LED lights 8 and 8 are housed in a stacked state in the front-rear direction, and are attached to the back surface position of the light guide plate 7 so that a large amount of light can be stored in a short time by directly irradiating the light storage sheet 5 with light. . The color of the LED lights 8 and 8 can be arbitrarily selected. For example, when the display 1 is installed outdoors, a light-emitting pigment that emits blue light that calms the human mind and suppresses crime is used. Is preferred.

  Further, a power generation source 12 such as a lithium battery or a solar battery is accommodated in the lower part 2 b of the case body 2. When using a solar cell, a solar panel may be provided on the upper surface of the upper panel portion 2a of the case body 2, for example.

  The connection means between the LED lights 8 and 8 and the power generation source 12 is provided with a switch circuit (not shown) to which an optical sensor 15 is connected. Then, when the brightness detected by the light sensor 15 is less than or equal to the predetermined brightness, the switch circuit is turned on, the LED lights 8, 8 are turned on for 1 minute, and then the LED lights 8, 8 are turned off for 30 minutes, This turning on and off is repeated until the light sensor 15 detects a predetermined brightness.

  Next, the effect | action of the above-mentioned display 1 is demonstrated based on an experiment example.

In the experimental example, the LED lights 8, 8 are turned on for 1 minute, and the light irradiated from the LED lights 8, 8 is directly irradiated to the phosphorescent sheet 5 via the light guide plate 7 and the milky white plate 6, and then, The LED lights 10, 10 were extinguished for 30 minutes, and the lighting and extinguishing were repeated for 24 hours. The luminance immediately after lighting for 1 minute in the display 1 during this period is about 1200 mcd / m ^2, and the luminance after 30 minutes is 90 mcd / m ² or more as shown in Table 1 below. In addition, the luminance at which the viewer can clearly see the display unit (marker) 3 can be sufficiently maintained.

  As described above, according to the display device 1 of the present invention, the light irradiated from the LED lights 8 and 8 can be efficiently and directly irradiated on the back surface of the phosphorescent sheet 5 through the light guide plate 7 and the milky white plate 6. In addition, it is possible to irradiate the phosphorescent sheet 5 while making the light uniform with the milky white plate 6, and thereby, the phosphorescent sheet 5 can store a uniform amount and a large amount of light. As a result, the lighting time of the LED lights 8, 8 can be suppressed to a very short time, and the light storage secured in a large amount in the light storage sheet 5 can be emitted for a long time while maintaining a predetermined brightness or more. Therefore, during the daytime, the display unit 3 of the display panel 4 can be clearly visually recognized by the light emission of the phosphorescent sheets 5 and 5 by sunlight, and in the dark or at night, the rechargeable battery or the solar cell can be visually confirmed, In the dark or at night, the display part of the display plate 4 is caused by the light emission of the phosphorescent sheets 5 and 5 by intermittently turning on and off the LED lights 8 and 8 using a rechargeable battery or a solar battery as a power generation source 12. 3 is lit up from behind, so that the display part 3 of the display board 4 can be clearly seen even in the dark or during a power outage at night, and is excellent in power saving.

  Further, even if the LED lights 6 and 6 are set to alternately turn on for only 1 minute and turn off for 30 minutes alternately, the phosphorescent sheet 5 can sufficiently emit light so that the display unit 3 can be clearly seen. Therefore, it is particularly excellent in power saving.

  It is a schematic front view of the indicator of the present invention.   It is the sectional view on the AA line of FIG.

DESCRIPTION OF SYMBOLS 1 Display 3 Display part 4 Display board 5 Phosphorescent sheet 6 Milky white plate 7 Light guide plate 8 LED light 9 Specular reflector

Claims (2)

  A display plate 4 made of a transparent acrylic plate having rain resistance and light resistance and having an opaque display portion 3 on one of the front and back surfaces, and a phosphorescent agent having no concealing layer provided on the back surface of the display plate 4 are mixed. The phosphorescent sheet 5, the milky white plate 6 provided on the back surface of the phosphorescent sheet 5 and transmitting light while being uniformly distributed, the light guide plate 7 provided on the back surface of the milky white plate 6, and the rear surface position of the light guide plate 7 LED lights 8 and 8 for irradiating light to the phosphorescent sheet 5 using a lithium battery or a solar battery as a power generation source, and a concealing layer function of the phosphorescent sheet 5 provided on the back side of the LED lights 8 and 8 and the light guide plate 7 A mirror reflector 9 having a light source, and irradiating light emitted from the LED lights 8, 8 directly to the phosphorescent sheet 5 through the light guide plate 7 and the milky white plate 6. Indicator, characterized in that the by irradiating a phosphorescent sheet 5 with uniform and so that and large quantities phosphorescent uniform shape in phosphorescent sheet 5.   The display according to claim 1, wherein the LED lights (8, 8) are set so as to alternately turn on for 1 minute and turn off for 30 minutes at least in the dark or at night.

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