JP4374401B2 - Ultra thin high brightness light panel - Google Patents

Description

  The present invention relates to an ultra-thin high-intensity light panel in which an ultra-high-brightness LED is turned on with an AC power source, and illumination of a display film is formed with high brightness and uniform brightness.

As means for diffusing and displaying patterns of characters, pictures, images, etc., for example, a cutting sheet or display film is attached to an uneven transparent plate, or the cutting sheet or display film is applied to an organic or inorganic EL. There are things that stick and illuminate. In addition, recently, there are some that use EL as an illuminator. As a known technique related to the present invention, “Patent Document 1” is cited.
JP 2001-194534 A (FIG. 1)

Although both the conventional technique and the known technique can diffusively display a cutting sheet or a display film, there are problems in that the luminance is insufficient and the brightness of the screen is not uniform. Also, the overall thickness is not thin but heavy. In addition, when connecting to an AC power source, an inverter is required separately, which is troublesome to carry and set, and there is a problem that cannot be compacted as a whole. In addition, EL is at present, are expensive, it can not be used easily.

  The present invention solves the above-described problems, and can irradiate an ultra-bright LED without using an external inverter, and can uniformly and super-brightly display the entire screen, is thin, lightweight and easy to handle. An object of the present invention is to provide an ultra-thin high-intensity light panel that has a long lifetime.

In order to achieve the above object, the present invention provides a frame body made of a material having a heat dissipation property, an image display unit detachably housed in the frame body,
An ultra-bright LED held in the frame to illuminate the image display;
A light panel comprising an LED lighting circuit unit interposed between the ultra-bright LED and a power source and held by the frame;
The image display unit includes a light guide plate for light diffusion made of synthetic resin, and a display film and a reflective plate disposed on at least one of the front surface and the back surface of the light guide plate for light diffusion, and the light guide plate for light diffusion Engraves a group of a large number of linear bodies arranged side by side along the light entering / exiting direction on at least one of the front surface and the back surface of the plate, and the linear body has its width dimension and depth dimension input to the light. The size is increased from the direction toward the center, and the pointed laser processed body is densely formed on the linear body from the light input end toward the center.

Further, the invention of claim 2 is characterized in that a peripheral edge of the light diffusion light guide plate is mirror-finished, and a reflector is disposed on the peripheral edge where the super bright LED is not disposed.

Further, the invention of claim 3 is characterized in that a reflector is disposed on the periphery of the ultra-bright LED.
In the invention of claim 4, a plurality of the light diffusing light guide plates are arranged so that the groups of the wire bodies face each other,
In the meantime, the reflection plate is interposed.

In the invention of claim 5, a plurality of the light diffusing light guide plates are juxtaposed, and a reflecting plate is disposed on the side of the group of linear bodies of the one light diffusing light guide plate,
The display film is arranged on a flat surface side of the other light diffusion light guide plate without the group of the linear bodies.

  The invention of claim 6 is characterized in that the groups of the linear bodies of the adjacent light diffusion light guide plates are arranged orthogonal to each other.

  The invention of claim 7 is characterized in that a light diffusion plate is interposed between the light diffusion light guide plate and the reflection plate.

  According to the ultra-thin high-intensity light panel of the first aspect of the present invention, the image display unit is irradiated with ultra-high luminance by the ultra-high luminance LED that is directly connected to the AC power source and illuminates, and the image display unit is configured. Due to the specially processed light diffusion light guide plate, the display film is diffused with uniform illuminance and illuminated with ultra-high brightness. Further, the plate material constituting the image display unit can be thin and lightweight, and can be exchanged, and can be carried, maintained, handled, and stored very easily. Moreover, since the LED is used, it has a long life.

  Moreover, according to the invention of Claim 2 thru | or 5, light diffusibility can be improved further and a very bright film display can be performed.

  According to the ultrathin high-intensity light panel of claim 6, the light diffusion degree can be further improved by providing the light diffusion plate, and a brighter screen display can be achieved.

Embodiments of an ultra-thin high-intensity light panel according to the present invention will be described in detail below with reference to the drawings.
1 to 5 show "Embodiment 1" of the present invention, and FIG. 7 shows Embodiment 2 of the present invention.

  FIG. 1 shows an outline of the overall structure of an ultra-thin high-intensity light panel according to the present invention. The ultra-thin high-intensity light panel 100 includes a frame 3 made of a light-emitting and light-weight material, such as an aluminum material, an image display body 4 housed in the frame 3, and an ultra-high-intensity LED 5 held in the frame. And an LED lighting circuit section 6 interposed between the AC power supply 7 and the ultra-high brightness LED 5 and held in the frame 3. The AC power supply 7 may be 100 V, and an external inverter is not necessary. Further, in this embodiment, the super-bright LEDs 5 are disposed above and below the frame 3 and the LED lighting circuit portions 6 are disposed on the left and right of the frame 3, but the present invention is not limited to this.

  The frame 3 forms a space 8 for internally holding the ultra-bright LED 5 and the LED lighting circuit unit 6 and a holding unit 9 for detachably holding the image display unit 4. Each consists of a rectangular frame that can be separated. Since it is made of an aluminum material, it is extremely lightweight and has good heat dissipation.

  The image display unit 4 includes a light diffusion light guide plate 1 made of acrylic resin, a display film 10 disposed in contact with the front surface, and a reflection plate 11 disposed in contact with the back surface. In addition, a well-known thing is applied for the reflecting plate 11, and the display film 10 may be arbitrary. The light diffusion light guide plate 1 is a main component of the present invention, and the detailed structure thereof will be described later.

As described above, a large number of super-bright LEDs 5 are arranged in the upper and lower frames of the frame 3, and the number is determined by the size and type of the image display unit 4. A detailed structure of a single ultra-bright LED 5 and each member around it is shown in FIG. That is, the LED main body 5a is protected by a transparent protective cover 5g, and the LED main body 5a is supported on the LED printed board 5c via the LED mount portion 5b made of conductive insulating rubber. The LED printed circuit board 5c is connected to the LED lighting circuit section 6. Further, the heat radiating body 5d is supported by an aluminum material 5d, and the heat radiating body 5d is held on the frame 3 by an insulating material 5e. A reflective material 5f is disposed around the protective cover 5g that encloses the LED main body 5a. In addition, a wiring 5h connected to the LED printed board is accommodated in the frame 3.

  The LED lighting circuit unit 6 that is directly connected to the AC power source 7 has a structure that makes the AC from the AC power source 7 a DC of a low voltage necessary for irradiating the ultra-bright LED 5, and includes a special circuit. However, for example, an “AC LED lighting circuit” disclosed in Japanese Patent No. 312870 is employed. In this embodiment, the LED lighting circuit section 6 is housed in the left and right frames of the frame body, and the number of houses is determined according to the size of the screen display section 4.

With the above configuration, for example, when a 100 V power source is input from the AC power source 7, the input current is controlled by the LED lighting circuit unit 6, and a low voltage capable of lighting the ultra-bright LED 5 is output with a power close to a direct current. Then, the ultra-bright LED 5 is turned on and the image display unit 4 is illuminated. Specifically, the light of the ultra-bright LED 5 is input to the light diffusion light guide plate 1, and the diffused light is introduced into the display film 10 directly and through the reflection plate 11 to make the display film 10 ultra bright. And illuminate uniformly. In addition, since the display film 10 can be replaced with a desired one, any display film can be illuminated. In addition, other components can be exchanged and can be used for a long time as a whole. As shown in FIG. 2, the display film 10 is held by a transparent protective plate 12, and the reflecting plate 11 is held by a reinforcing plate 13.

Next, the shape of the light diffusing light guide plate 1, which is a main component of the ultra-thin high-intensity light panel 100 of the present invention, will be described with reference to FIGS. 4, 5, and 6. FIG. Light diffusion light guide plate 1 is, for example, a rectangular flat plate member 1a formed of an acrylic resin, which, for example, made of engraved by multi several groups of lines body 2 by laser processing. The linear body 2 is composed of a substantially linear linear body that is formed from the side (one end portion) of the ultra-bright LED 5 toward the other end side, and the linear bodies 2 are arranged in parallel. In addition, although each linear body 2 is fundamentally the same shape, a different shape may be sufficient. The wire 2 may be engraved not only on the front surface of the plate but also on the back surface. The reflecting plate 11 is disposed on the linear body 2 side of the light diffusion light guide plate 1.

FIGS. 5A and 5B are schematic enlarged views of the detailed structure of the wire 2. The linear body 2 is on one end side, and has a width w and a depth t, and has a width W (W> w) and a depth T (T> t) at the center of the flat plate 1a. In other words, the linear body 2 is formed to be expanded from the width w to the width W and from the depth t to the depth T. In this case, the widths w and W and the depths t and T are determined empirically and experimentally in consideration of the size of the flat plate 1a and the function, size, shape, etc. of each component. As described above, the light input from the ultra-high brightness LED 5 at one end becomes uniform diffused light in all the places of the flat plate 1a, and the display film 10 is illuminated uniformly and with ultra-high brightness.

  Although the shape of the wire 2 has been described with reference to FIGS. 5A and 5B, the wire 2 is further processed as shown in FIG. That is, on the surface on which the linear body 2 is engraved, a point laser processed body 2a is formed in a dot shape by laser processing. The dotted laser processed body 2a is processed so as to become gradually denser from one end side of the linear body 2 on which the ultra-bright LED 5 is arranged toward the center. The degree and change of this density are determined empirically and experimentally. By engraving the spot-like laser processed body 2a, more uniform diffused light is obtained, and the brightness can be improved.

As shown in FIG. 7A, the light diffusing light guide plate 1 is made of a mirror-finished peripheral edge. Thereby, the light transmittance from the ultra-high brightness LED 5 is improved. Moreover, as shown in FIG.7 (b), the reflector 5f is provided in the periphery other than the side by which the ultrahigh-intensity LED5 is arrange | positioned at the periphery of the light-guide plate 1 for light diffusion. Thereby, the light diffusivity can be improved.

  FIG. 8 shows an embodiment using two light guide plates 1 and 1 for light diffusion. The light diffusing light guide plates 1 and 1 are arranged with their linear bodies 2 facing each other, and a reflecting plate 11 is interposed therebetween. In this case, the display film 10 is disposed on the plane side of the light diffusion light guide plates 1, 1. As described above, brighter display is possible.

  FIG. 9 shows an embodiment in which two light diffusion light guide plates 1 and 1 are arranged adjacent to each other in the same direction. In this case, the reflecting plate 11 is disposed in contact with the linear body 2 of the light diffusion light guide plate 1 on one side, and the display film 10 is disposed in contact with the plane side of the other light diffusion light guide plate 1. Thus, a brighter display is possible.

  FIG. 10 shows two light diffusing light guide plates 1 and 1 in which linear bodies 2 are arranged orthogonally to each other, so that even brighter display is possible.

  In the second to fourth embodiments, the pair of light diffusing light guide plates 1 has been described. However, the light diffusing light guide plate 1 is not limited to two.

  The ultra-thin high-intensity light panel 100 according to the first embodiment is arranged with the reflecting plate 11 in direct contact with the light diffusing light guide plate 1. However, as shown in FIG. The type high-intensity light panel 100a includes a light diffusing light guide plate 1 and a reflecting plate 11 with a diffusing plate 14 interposed therebetween. This makes it possible to further improve the degree of diffusion. Of course, the diffusion plate 12 may be unnecessary depending on the function of the light diffusion light guide plate 1.

  The ultra-thin high-intensity light panels 100 and 100a of the present invention are applied to all kinds of display films that require illumination. The application range is extremely wide.

The top view which shows the whole structure of the ultra-thin high-intensity light panel of this invention. The AA line expanded sectional view of FIG. The expanded sectional view which shows the detailed structure of the ultra-high-intensity LED in an ultra-thin high-intensity light panel. The top view which shows the light-diffusion light-guide plate of the image display part of the ultra-thin high-intensity light panel of this invention. 5 is a schematic enlarged view showing a detailed shape of a linear body of the light diffusing light guide plate in FIG. 4 (plan view (a), cross-sectional view along line BB of the plan view (a)). FIG. The partial top view which shows the dotted | punctate laser processing body engraved on a linear body. The perspective view (a) and top view (b) which show the structure of the periphery of the light-guide plate for light diffusion in this invention. The schematic cross section which shows arrangement | positioning of the light-diffusion light-guide plate, reflector, and display film in the ultra-thin high-intensity light panel of Example 2 of this invention. The schematic cross section which shows arrangement | positioning of the light-diffusion light-guide plate, reflector, and display film in the ultra-thin high-intensity light panel of Example 3 of this invention. The schematic top view which shows the arrangement | positioning form of the light-guide plate for adjacent light diffusion in the ultra-thin high-intensity light panel of Example 4 of this invention. Sectional drawing of the ultra-thin high-intensity light panel which provided the diffusion plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light-diffusion light-guide plate 1a Flat plate body 2 Line body 2a Dot-shaped laser processing body 3 Frame body 4 Image display part 5 Super bright LED
5a LED body 5b LED mount part 5c LED printed circuit board 5d Heat sink 5e Insulator 5f Reflective material 5g Protective cover 5h Wiring 6 LED lighting circuit part 7 AC power supply 8 Space 9 Holding part 10 Display film 11 Reflector 12 Transparent protection Plate 13 Reinforcement plate 14 Diffusion plate 100 Ultra thin high brightness light panel 100a Ultra thin high brightness light panel

Claims (7)

A frame made of a heat-dissipating material;
An image display unit detachably housed in the frame;
An ultra-bright LED held in the frame to illuminate the image display;
A light panel comprising an LED lighting circuit unit interposed between the ultra-bright LED and a power source and held by the frame;
The image display unit
A light guide plate for light diffusion made of synthetic resin;
It consists of a display film and a reflector arranged on at least one of the front surface or the back surface of the light diffusion light guide plate,
The light diffusion light guide plate is formed by engraving a group of a plurality of linear bodies arranged in parallel along the light entering / exiting direction on at least one of the front surface or the back surface of the plate,
The linear body expands its width dimension and depth dimension from the light input direction toward the center,
An ultra-thin, high-intensity light panel, wherein the line-shaped body is formed by densely forming a dotted laser processed body from the light input end toward the center. The peripheral edge of the light diffusing light guide plate is mirror finished,
The ultra-thin high-intensity light panel according to claim 1, wherein a reflective material is disposed on the peripheral edge where the ultra-high-intensity LEDs are not disposed. The ultra-thin high-intensity light panel according to claim 1, wherein a reflective material is disposed on a periphery of the ultra-high-intensity LED. A plurality of the light diffusing light guide plates are arranged so that the groups of the wire bodies face each other;
The ultra-thin high-intensity light panel according to any one of claims 1 to 3, wherein the reflection plate is interposed therebetween. A plurality of the light diffusing light guide plates are arranged side by side, and a reflecting plate is disposed on the group side of the linear body of the one light diffusing light guide plate,
5. The ultra-thin high structure according to claim 1, wherein the display film is arranged on a flat surface side of the other light diffusion light guide plate without the group of the linear bodies. Luminance light panel.   The ultra-thin high-intensity light panel according to any one of claims 1 to 5, wherein the groups of the linear bodies of the light guide plates for light diffusion adjacent to each other are arranged orthogonal to each other.   The ultra-thin high-intensity light according to any one of claims 1 to 6, wherein a light diffusion plate is interposed between the light diffusion light guide plate and the reflection plate. panel.

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