JPH10282913A - Light-emitting display panel - Google Patents

Abstract

(57) [Problem] To provide a light emitting display panel in which the volume and weight of the device are reduced while suppressing the reduction of the visibility improving effect. An image region having a predetermined shape having a light shielding property for light in a light emission wavelength range of a light emitting diode, and a predetermined image formed in the image region and transmitting light in the light emission wavelength region of the light emitting diode. The light transmitting region 14 having the shape is
Is formed on the display surface. Then, the light emitting diode 4 is fixed to the back surface of the display panel 1 located on the back side of the light transmitting region 14. By doing so, the light-transmitting region 1 that emits LED light
4 is surrounded by the surrounding image area 13 that blocks or significantly attenuates the LED light, so that an excellent pinpoint visibility improving effect can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting display panel which emits light on a flat or curved display plate such as a poster, menu, or guide plate.

[0002]

2. Description of the Related Art As a light-emitting display panel for emitting an image (including characters), that is, a display pattern, a display pattern is formed on a light-transmitting light-transmitting plate by drawing, printing, sticking, and the like. A light-emitting display panel is known in which a back-lighting device (backlight device) such as an EL (electroluminescence) plate or a fluorescent lamp is provided on the back side, and the light-transmitting plate emits light.

In order to display only a part of the display surface of the light emitting display panel by light emission, only a region to be lighted (light-transmitting region) is made to emit light, and the remaining region is made light-shielding, thereby selectively emitting light. It is also known to cause.

[0004]

However, in the above-mentioned conventional light emitting display panel using an EL plate as a backlight device, the luminance (illumination illuminance) is low, and the effect of improving visibility is insufficient. On the other hand, in the case of using a fluorescent lamp, the physique and weight of the device are remarkably increased in spite of the effect of improving the visibility, and the burden of power consumption and replacement work of the tube is large, so that the limited use is required. It was difficult to use only in places.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to reduce the volume of the apparatus while suppressing a decrease in the visibility improving effect.
To provide a light-emitting display panel with a reduced weight,
Its primary purpose is. It is a second object of the present invention to provide a light emitting display panel having a unique visibility improving effect.

It is a third object of the present invention to provide a light emitting display panel which has excellent visibility and can be used in a wide range of environments.

[0007]

According to a first aspect of the present invention, there is provided a light-emitting display panel, wherein an image region having a predetermined shape and having a light-shielding property with respect to light in a light emission wavelength range of a light-emitting diode is formed in the image region. Thus, a light-transmitting region having a predetermined shape that transmits light in a light-emitting wavelength region of a light-emitting diode (hereinafter, also simply referred to as an LED) is formed on the display surface of the display panel. Then, a light emitting diode is fixed to the back surface of the display panel at the back side of the light transmitting region.

[0008] In this case, the following operation and effect can be obtained. First, since the light-transmitting region that emits the LED light is surrounded by the surrounding image region that blocks or significantly attenuates the LED light, an excellent pinpoint visibility improvement effect can be obtained. LEDs have high brightness and low power consumption, and have great practical effects in terms of volume, weight, power consumption, and maintenance of the device.

More specifically, for example, a pinpoint light emitting poster or the like can certainly be constituted by a fluorescent lamp and a perforated light shielding plate on the front surface thereof. However, since the size and weight of the device impose severe conditions on the place where it is installed and the supporting device that supports it, it is a serious drawback for this type of device that is most important to attach it to the desired installation site. turn into.

According to this configuration, it is possible to provide a light-emitting display panel which eliminates these drawbacks, is excellent in the degree of freedom in installation, and is excellent in the effect of improving visibility by a unique pinpoint illumination effect. In addition, the degree of freedom in curving, deforming, and enlarging or reducing the display surface is significantly improved as compared with a fluorescent backlight type light emitting display panel. Further, since the light emitting diode (LED) is fixed to the display panel itself, the configuration is simplified.

According to a second aspect of the present invention, the light transmitting region has a light scattering function. In this way, when the LED is not lit, the viewer can see the LED and its holder (LED holder) through the light-transmitting area, or the light-transmitting area looks dark like a dark hole in the image area. Thus, it was found that a practically excellent effect can be obtained without producing a negative visual effect.

According to a third aspect of the present invention, in the configuration of the first or second aspect, the display panel is further installed at a front opening of the frame box in which the lighting fixture is accommodated. By doing so, it is possible to make the other predetermined image areas (including the background image area) emit light at a lower appropriate brightness together with the creation of a luminescent spot area by pinpoint light emission by the LED light, so that further visual recognition is possible. The effect of improving the performance can be exhibited.

Further, in this configuration, the display plate is formed by mounting the display sheet having the above-described light-transmitting region and the LED light-shielding image region surrounding the light-transmitting region on the light diffusing plate. The light diffuser, which scatters the background radiation and homogenizes it and hides the presence of lighting equipment, also scatters the LED light and hides the presence of the LED. Can be avoided. Also,
If the display sheet is replaced, the light diffusion plate and the LEDs fixed thereto can be reused. Further, even if the mounting position of the LED is changed, the light is always diffused, so that the gloomy appearance of the light-transmitting region when not lit can be improved.

According to a fourth aspect of the present invention, there is further provided a secondary battery for storing the power generated by the photovoltaic solar cell and supplying the power to the light emitting diode. . By doing so, the freedom of installation, which is particularly important for the display panel, is remarkably improved. For example, even without a manageable commercial power supply, a display panel can be provided at a desired site that is easily visible, indoors and outdoors, to emit light in the light-transmitting region.

Further, according to this configuration, the light emitting display panel does not require a commercial power supply, and the light emitting diode operates with a very low voltage of about 1.5 V DC power. In addition, the configuration of the power supply unit is extremely large, heavy, and expensive compared to the display unit. On the other hand, according to this configuration, the wiring, the voltage conversion circuit, and the like are extremely simplified, a small and lightweight power supply circuit can be used, and safety is improved.

When a solar cell and a secondary battery are used, the amount of emitted light is limited by the power generation capacity and the storage capacity. For example, it is sufficient to emit light only once every 5 seconds for 1/10 second. Has an effect of improving visibility,
To drive only a few LEDs or less, it is only necessary to use small solar cells and secondary batteries. According to the configuration of claim 5, in the configuration of claim 4, the secondary battery is further integrated with the display panel. In this way, the device can be made more compact and the degree of freedom in installation can be further increased.

According to a sixth aspect of the invention, in the configuration of the fourth or fifth aspect, the solar cell is further fixed to a back surface of a light-transmitting light-receiving region of the display panel. In this way, the device can be made more compact and the degree of freedom in installation can be further increased. According to the seventh aspect of the present invention, similarly to the first aspect, the display panel has an image area of a predetermined shape having a light-shielding property with respect to light in a light emission wavelength range of the light emitting diode, and the display area includes an image area. The light-emitting diode (hereinafter, also simply referred to as an LED) has a light-transmitting region having a predetermined shape that transmits light in a light-emitting wavelength range, and the light-emitting diode is held behind the light-transmitting region. However, LE
For holding D, a diffusion plate for diffusing background light is provided on the back side,
This is performed by fixing the LED holder to the diffusion plate.

According to this configuration, the same operation and effect as those of the first aspect can be obtained.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a display plate or a diffusion plate, a milk plate serving as a light diffusion plate made of an acrylic resin plate or a glass plate can be used, and a display made of paper or a resin film on which an image is printed can be used. It can be configured by mounting a seat.

[0020]

The preferred embodiments of the present invention will be described in more detail with reference to the following examples. (Embodiment 1) FIG. 1 is a front view of a main part of a light emitting display panel of this embodiment, and FIG. 2 is a cross-sectional side view of a main part taken along line AA of FIG.

Reference numeral 1 denotes a poster-shaped display sheet,
It is in close contact with the entire front surface of a milk plate (diffusion plate) 2 made of a white acrylic plate. The display sheet 1 and the milk plate (diffusion plate) 2 constitute a display plate according to the present invention. Display sheet 1
It has a background image area 11, a first image area 12, a third image area 13, a fourth image area 14, and a fifth image area 15, which are made of a printed resin sheet and have mutually different colors.

The third image area 13 is an image area that does not transmit LED light (here, red light) (or has a transmittance smaller than that of the fourth image area 14), and the fourth image area 14 surrounded by the third image area 13 is an LED. It is a light-transmitting region that transmits light (red light) well. An LED holder 3 is adhered to the back surface of the nipple plate 2 at a position behind the central portion of the fourth image area (light-transmitting area) 14, and an LED that emits red light is attached to the LED holder 3.
4 is attached. Light emission of LED4 is milk plate (diffusion plate)
2, the entire fourth image area (light-transmitting area) 14 slightly wider than the opening of the LED 4 emits red light, and its pinpoint visibility is remarkably improved.

FIG. 3 is an overall sectional side view of the light emitting display panel. Reference numeral 5 denotes a frame box, and a milk plate (diffusion plate) 2 having the display sheet 1 closes an opening of the frame box 5. A sheet-shaped amorphous solar cell 6 is adhered to the back surface of the milk plate (diffusion plate) 2, and a controller 7 and a secondary battery 8 are adhered to the inner surface of the frame box 5. Of course, the solar cell 6 and the controller 7 may be formed integrally. The controller 7 blinks the LED 4 using the low-voltage DC power from the secondary battery 8. FIG. 4 shows a circuit diagram of the light emitting display panel. (Embodiment 2) Another embodiment will be described with reference to a sectional side view of a main part shown in FIG. However, components having the same main functions as those of the light emitting display panel of the first embodiment are denoted by the same reference numerals.

In this embodiment, a fluorescent lamp 9 is provided in a frame box 5 in the light emitting display panel of the first embodiment, and this fluorescent lamp is used for background illumination. Also in the case of this embodiment, the fourth image area (light-transmitting area) 14 transmits the red light emitted by the LED 4 strongly, and the third image area 13 that partially or entirely surrounds the red light almost completely transmits the red light. Since the fourth image area (light-transmitting area) 14 does not pass through, a visual recognition effect in which the fourth image area (light-transmitting area) 14 appears can be obtained. (Embodiment 3) Another embodiment will be described with reference to the sectional side view of the main part shown in FIG. However, components having the same main functions as those of the light emitting display panel of the second embodiment are denoted by the same reference numerals.

This embodiment is different from the light emitting display panel of the second embodiment in that the frame box 5 is provided between the fluorescent lamp 9 and the milking plate (diffusion plate) 2.
Inside, a second milk plate (diffusion plate) 20 is additionally provided, and the LED holder 3 is fixed to the second milk plate (diffusion plate) 20. Reference numeral 31 denotes a holder support fixed to the second milk plate (diffusion plate) 20. The LED holder 3 is supported by the holder support 31 and displays the LEDs 4 (see FIG. 2) on the display sheet 1.
The fourth image area (light-transmitting area) 14 (see FIG. 1) is located on the back side and faces the milk plate (diffusion plate) 2.

In this way, two milk plates (diffusion plates)
By using the light emitting devices 2 and 20, the scattering of the light emitted from the fluorescent lamp 9 can be improved, and the radiating plate (diffusion plate) 2 can simultaneously scatter the light emitted from the LED 4. (Embodiment 4) Another embodiment will be described with reference to the sectional side view of the main part shown in FIG. However, components having the same main functions as those of the light emitting display panel of the first embodiment are denoted by the same reference numerals.

This embodiment is different from the light emitting display panel of the second embodiment shown in FIG. 3 in that the frame box 5 is omitted and a milk plate (diffusion plate) is used.
2, all necessary circuit elements are arranged on the back surface. More specifically, a transparent liquid encapsulating resin is solidified on the back surface of the milking plate (diffusion plate) 2 to form the ridge 11, so that the L is laid horizontally inside the ridge 11.
ED4 is embedded.

Reference numeral 12 denotes an aluminum sheet adhered to the surface of the mound, and constitutes a light reflection plate of the LED 4. The wiring terminal 40 of the LED 4 is connected to a wiring layer of the flexible wiring tape 13 described later. FIG. 8 shows an installation example of the solar cell 6, the controller 7, and the sheet-like secondary battery 8 in this embodiment.

As described above, the flexible wiring tape 13 to which the wiring terminals 40 of the LED 4 are connected is adhered to the back surface of the milk plate (diffusion plate) 2. The solar cell 6, the controller 7, and the sheet-shaped secondary battery 8 are mounted and fixed on the flexible wiring tape 13, and necessary wiring connections are made. The flexible wiring tape 13 is adhered to the back surface of the milk plate (diffusion plate) 2.

In this way, the light-emitting display panel, such as a poster, can be attached to, for example, a telephone pole, a car body, or the outer wall of a building, and can be illuminated and displayed at night. Can be realized. Note that the controller 7 can perform control to supply power to the LED 4 after the output current from the solar cell 6 has decreased to a predetermined value or less, or after a lapse of a predetermined time therefrom. That is, the solar cell 6 can be used as an external illuminance detection sensor, and the configuration can be further simplified.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a light emitting display panel according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional side view of a main part of the light emitting display panel shown in FIG.

FIG. 3 is a sectional side view of the light emitting display panel shown in FIG.

FIG. 4 is a circuit diagram of the light emitting display panel shown in FIG.

FIG. 5 is a sectional side view of a main part of a light emitting display panel according to a second embodiment.

FIG. 6 is a sectional side view of a main part of a light emitting display panel according to a third embodiment.

FIG. 7 is a sectional side view of a main part of a light emitting display panel according to a fourth embodiment.

FIG. 8 is a sectional side view of a main part of a light emitting display panel according to a fourth embodiment.

[Description of Signs] 1 is a display sheet (a part of the display plate), 2 is a dairy plate (the rest of the display plate), 2 is a LED, 5 is a frame box, 6 is a solar cell, 7 is a controller, and 8 is two Next battery.

Claims (7)

[Claims] 1. A display surface on which an image of a predetermined shape is formed, a predetermined image region formed on the display surface and having a light shielding property for light in a light emission wavelength range of a light emitting diode, and A display plate formed and having a light-transmitting region that transmits light in the emission wavelength range of the light-emitting diode; and a light from the light-transmitting region that is fixed to the back surface of the display plate and located on the back side of the light-transmitting region. A light-emitting display panel comprising: a light-emitting diode that emits light. 2. The light emitting display panel according to claim 1, wherein said light transmitting region has a light scattering function. 3. The light-emitting display panel according to claim 1, wherein the display panel includes a display sheet on which each of the regions is formed;
A light-emitting display panel, comprising: a light diffusing plate on which the display sheet is mounted; and a light-emitting display panel installed in a front opening of a frame box in which a lighting device is accommodated. 4. The light-emitting display panel according to claim 1, further comprising: a solar cell for photovoltaic power generation; and a secondary battery for storing power generated by the solar cell and supplying power to the light-emitting diode. A light-emitting display panel, comprising: 5. The light emitting display panel according to claim 4, wherein said secondary battery is integrally fixed to a back surface of said display panel. 6. The light-emitting display panel according to claim 4, wherein the solar cell is fixed to a back surface of a light-transmitting light-receiving region of the display panel. 7. A display surface on which an image having a predetermined shape is formed, a predetermined image region formed on the display surface and having a light-shielding property against light in a light emission wavelength range of a light emitting diode, and A display plate formed and having a light-transmitting region that transmits light in the emission wavelength range of the light-emitting diode; a lighting device disposed on the back side of the display plate to illuminate the display plate; A diffusion plate disposed between the lighting device and scattering the light of the lighting device; a frame box supporting the display plate and housing the lighting device and the diffusion plate; and a rear side of the light-transmitting region. A light-emitting diode fixed to the diffusion plate and emitting light from the light-transmitting region.