JP4746152B1 - Illumination device for display - Google Patents

Abstract

An illumination device for a display body that illuminates a display body having a rectangular or oval display surface having a major axis and a minor axis having different lengths in length and breadth by light from a light emitting device, the display surface being Provided is a lighting device for a display body that can illuminate more uniformly and can be reduced in cost.
A light emitting device 4 is provided at a predetermined interval on a display surface 1a side of a display body 1 having a rectangular or oval display surface 1a having a major axis X1 and a minor axis X2 having different lengths in the vertical and horizontal directions. An illumination device for a display body that is disposed and illuminates the display surface 1a by irradiating light onto the display surface 1a from the light emitting device 4, and includes one light emitting device 4, and the light emitting device 4 is supported by a support member 3 The single light-emitting device 4 is provided with a plurality of light-emitting diodes that emit light toward the display surface 1a so as to weaken the light in the optical axis direction and increase the light in the long axis X1 direction. A light distribution lens for distributing light from the light emitting diodes is provided for each light emitting diode to form a light emitting unit.
[Selection] Figure 1

Description

  The present invention relates to an illumination device for a display body that illuminates a display surface of a display body such as a signboard.

  A light emitting device is disposed at a predetermined interval on the display surface side of a display body having a rectangular or oval display surface having major and minor axes having different lengths in the vertical and horizontal directions, and light is emitted from the light emitting device to the display surface. The illumination device for display body shown in Patent Document 1 that illuminates the display surface by irradiating the display surface is known.

Japanese Patent No. 2680407 (FIG. 1)

  In the display illumination device of the above document, a plurality of light emitting devices are arranged in parallel in the major axis direction for the purpose of more uniformly illuminating the entire display surface. For this reason, when the light emitting device is not mounted and supported on the display body side, installation is troublesome. On the other hand, when the light emitting device is supported on the display body side by the support member, a plurality of support members or a structure having a complicated structure is supported. A member is required, and it is difficult to keep costs low.

  The present invention is an illumination device for a display body that illuminates a display body having a rectangular or oval display surface having a major axis and a minor axis having different lengths in length and breadth by light from a light emitting device. It is an object of the present invention to provide a lighting device for a display body that can illuminate the light more uniformly and can reduce the cost.

In order to solve the above problems, first, a predetermined interval is provided on the display surface 1a side in the display body 1 having a rectangular or oval display surface 1a having a long axis X1 and a short axis X2 having different lengths in the vertical and horizontal directions. The light emitting device 4 is disposed through the light emitting device 4 and the display surface 1a is irradiated with light to illuminate the display surface 1a. The display device illumination device includes one light emitting device 4, The light emitting device 4 is supported by the support member 3 with respect to the display body 1, and a plurality of light emitting diodes 7 that emit light toward the display surface 1 a are provided in the single light emitting device 4 to attenuate light in the optical axis S direction. with a light distribution lens 8 to direct light from the light emitting diode 7 to enhance the light to the long axis X1 direction is provided for each light emitting diode 7, the respective light-emitting unit 6 and the end portion of the display surface 1a The support member 3 is provided on the short axis X2 direction. A first light-emitting unit 6A having a first light distribution lens 8A that is a light distribution lens 8 that equally distributes light to the side, and light on the weak side that is the other side with respect to the strong side that is one side in the minor axis X2 direction And a second light emitting unit 6B having a second light distribution lens 8B that is a light distribution lens 8 that distributes light so that the light is weakened, and the side on which the support member 3 of the display surface 1a is disposed is on the weak side. Each second light distribution lens 8B is configured .

  Secondly, a plurality of the light emitting units 6 including one light emitting diode 7 and one light distribution lens 8 are arranged in parallel along the long axis X1 direction.

  Third, a plurality of light emitting unit rows L, which are rows of light emitting units 6 arranged in parallel in the long axis X1 direction, are provided in the short axis X2 direction.

Fourth, the support member 3 is arranged on the center side in the long axis X1 direction at the lower end portion of the horizontally long display surface 1a.

Fifth, the support member 3 is arranged on the center side in the minor axis X2 direction at the lower end portion of the vertically long display surface 1a.

Sixth, a plurality of first light emitting units 6A are juxtaposed in the short axis X2 direction to form a first light emitting unit row L1, and a plurality of second light emitting units 6B are juxtaposed in the short axis X2 direction to form a second light emitting unit. The first light emitting unit row L1 and the second light emitting unit row L2 are juxtaposed in the long axis X1 direction so as to be arranged as a row L2.

Seventh, the display body 1 is a signboard.

  According to the above configuration, since the single light emitting device is supported on the display body side via the support member, it is possible to use a single support member with a simplified configuration, and to keep costs low. The light distribution lens provided separately for each of the plurality of light emitting diodes that emit light toward the display surface emits light so that light in the optical axis direction is weakened and light in the long axis direction is strengthened. Since the light from the diode is distributed, the display surface of the display body can be illuminated more uniformly.

  In addition, a plurality of the light emitting units composed of one light emitting diode and one light distribution lens are arranged in parallel along the major axis direction, or in addition, a plurality of the light emitting units arranged in parallel in the major axis direction By providing a plurality of light emitting unit rows as rows in the short axis direction, the display surface of the display body can be illuminated more uniformly.

  A first light emitting unit having a first light distribution lens which is a light distribution lens provided with a support member at an end of the display surface and equally distributes light on both sides in the short axis direction; and one side in the short axis direction. A second light-emitting unit having a second light distribution lens that is a light distribution lens that distributes light so that light on the weak side, which is the other side, becomes weaker than the strong side, and a support member for the display surface is disposed Each of the second light distribution lenses is configured so that the side to be weakened is, or in addition to this, a plurality of first light emitting units are juxtaposed in the short axis direction to form a first light emitting unit row, If a plurality of two light emitting units are arranged in parallel in the short axis direction to form a second light emitting unit row, and the first light emitting unit row and the second light emitting unit row are arranged in parallel in the long axis direction, The end on the side opposite to the side on which the support member is disposed is Because be illuminated efficiently by the light from the second light emitting unit is possible, the display surface is, even with a certain length in the short axis direction, it is possible to illuminate the whole display surface more uniformly.

(A), (B) is the front view and side view of a signboard to which the present invention is applied. (A) is the A arrow view of the housing | casing shown in FIG. 1, (B) is an enlarged view of the light emission unit part of (A), (C) is perpendicular | vertical with respect to an optical axis direction LED. It is a side view at the time of seeing from various directions. (A) is drawing which shows the shape at the time of seeing a light distribution lens from an optical axis direction, (B), (C) is the B arrow directional view and C arrow directional view of (A). (A), (B) is the light quantity distribution figure of the light-emitting unit seeing in the optical axis direction, and the light quantity distribution figure of a major axis direction. (A), (B) is the top view and side view which show the specific example of a light distribution pattern. (A) is a front view of the signboard which shows another embodiment of this invention, (B) is drawing which shows the structure of the light emission surface of the light-emitting device of (A). (A) is a front view of the signboard which shows another embodiment of this invention, (B) is drawing which shows the structure of the light emission surface of the light-emitting device of (A). (A) is an external view of the second light distribution lens as viewed in the direction of the optical axis, (B) is a view taken in the direction of arrow B in (A), and (C) is a sectional view taken along the line CC in (A). . It is a light quantity distribution figure of the optical axis direction view of a 2nd light emission unit.

  1A and 1B are a front view and a side view of a signboard to which the present invention is applied. A horizontal rectangular signboard 1 which is a kind of display body includes a display surface 1a having a flat surface on one side, and the display surface 1a of the signboard 1 has advertisement information, guidance information, and other various images. Display information including information and character information is directly printed, or a sheet on which the display information is printed is attached.

  In this way, when the display surface 1a side of the signboard 1 is illuminated by the signboard illumination device (hereinafter simply referred to as “illumination device”) 2 to which the present invention is applied, this display is possible even when the surroundings are dark at night or the like. The display information on the surface 1a can be reliably viewed.

  In addition, the signboard 1 is formed in a square shape in which the longitudinal direction of the front view is directed in the horizontal direction, the long axis X1 is formed in the horizontal direction, and the short axis X2 is formed in the vertical direction. The entire signboard 1 (or the display surface 1a of the signboard 1) may be formed into a rhombus or other rectangular shape having a major axis X1 and a minor axis X2 having different lengths in length and width, or an ellipse or other ellipse shape. These may be combined to form a shape having a major axis X1 and a minor axis X2 vertically and horizontally. Incidentally, if the display surface 1a has the above shape, it is not necessary to form the display body itself into a plate shape.

  The illuminating device 2 includes a frame-like support frame (support member) 3 extending in the front-rear direction and protruding from the center of the lower end of the horizontally long sign 1 (the center of the lower end in the long axis X1 direction) to the front side. And a thick plate-like housing 4 fixedly attached to the projecting end of the frame 3. The casing 4 is supported and fixed at a position separated from the display surface 1 a of the signboard 1 by a predetermined distance D. The facing surface 4a of the housing 4 facing the display surface 1a is on the side away from the display surface 1a toward the upper side opposite to the side on which the lighting device 2 of the signboard 1 is installed (the lower side in the illustrated example). It is fixed to the support frame 3 in a posture inclined by a predetermined angle (inclination angle) α.

  2A is an A arrow view of the housing shown in FIG. 1, FIG. 2B is an enlarged view of the light emitting unit portion of FIG. 1A, and FIG. It is a side view at the time of seeing from the perpendicular direction. A plurality of light emitting units 6 are installed on the facing surface 4 a of the housing 4. One light emitting unit 6 includes one LED (light emitting diode) 7 and one light distribution lens 8. Each LED 7 is in a state in which the optical axis S of the LED 7 is set to be perpendicular to the facing surface 4a so that light is emitted from the facing surface 4a of the housing 4 toward the display surface 1a of the signboard 1. The LED 7 is fixed to the housing 4. That is, the housing 4 functions as a light emitting device (projector) by installing a plurality of light emitting units 6 on the facing surface 4a side.

  The LED 7 has a maximum amount of light when the irradiation angle β is within a range of −20 to 20 degrees with respect to the optical axis S direction, and within a range where the irradiation angle β is 20 degrees or more and −20 degrees or less. The luminous intensity distribution is set so that the amount of light gradually decreases as the absolute value of the irradiation angle β increases.

  FIG. 3A is a view showing the shape of the light distribution lens when viewed from the optical axis direction, and FIGS. 3B and 3C are views as viewed from the B and C arrows in FIG. The light distribution lens 8 has substantially the same shape as the outer shape when a pair of ellipses having the same shape are overlapped with each other so that the major axis is positioned on the same line when viewed in the direction of the optical axis S. 4 is formed into a dome-like shape from the facing surface 4a, and is made of a member such as a colorless and transparent synthetic resin or glass.

  In this way, a housing portion 8a serving as a housing space for housing the LED 7 is formed at the center of the light distribution lens 8 in which the major axis Y1 is set in the major axis direction. The accommodating portion 8a has an isosceles triangular (more specifically, equilateral triangular) cross-sectional shape and is formed in a direction orthogonal to the major axis direction Y1, and both ends of the accommodating portion 8a in the full length direction. And the housing 4 side end is open | released.

  Then, one light distribution lens 8 can be installed on each LED 7 so as to cover the housing portion 8 a from the upper side of the LED 7 fixed to the facing surface 4 a of the housing 4. At this time, the LED 7 is positioned at the central portion in the full length direction of the housing portion 8a, and the long axis Y1 direction of the light distribution lens 8 is the long axis X1 direction of the signboard 1 (the direction parallel to the long axis X1 direction of the signboard 1). The light distribution lens 8 is attached and fixed to the housing 4 in a posture to face.

  4A and 4B are a light amount distribution diagram of the light emitting unit viewed in the optical axis direction and a light amount distribution diagram of the long axis direction. By setting the major axis direction Y1 of the light distribution lens 8 to the major axis X1 direction of the signboard 1, the amount of light from the LED 7 is weakened in the optical axis S direction, and in the major axis X1 direction of the signboard 1, In addition to increasing the amount of light, in the direction of the short axis X2 of the signboard 1 (the direction parallel to the short axis X2 direction), light is evenly distributed to both sides. In other words, light in the direction of the optical axis S is distributed on both sides of the long axis X1 direction of the signboard 1, and light is equally distributed on both sides of the signboard 1 in the short axis X2 direction with respect to the optical axis S of the LED 7. The light distribution lens 8 is configured to distribute light.

  Specifically, within a range (specifically, within a range between −65 degrees and 65 degrees) that extends on both sides of the long axis X1 by a predetermined angle (specifically, about 65 degrees) with respect to the optical axis S. ), The light amount increases as the angle becomes wider with respect to the optical axis S. As a result, the light from the LED 7 is adjusted so that the amount of light is made uniform at each location on the display surface 1 a of the signboard 1. Incidentally, the predetermined interval D (the length of the support frame 3) is set so that the entire length of the signboard 1 is within the above-described range extending in the long axis X1 direction by the predetermined angle with respect to the optical axis S. .

  As shown in FIG. 2A, a plurality of light emitting units 6 configured in this way are arranged in parallel in the direction of the long axis X1 of the sign 1 (four in the illustrated example) at predetermined intervals (equal intervals), and a light emitting unit array L is configured, and the light emitting unit rows L are arranged in a plurality of rows (four rows in the illustrated example) at predetermined intervals (equal intervals in the illustrated example) in the direction of the short axis Y2 of the signboard 1. At this time, the corresponding LEDs 7 of the adjacent light emitting unit rows L are arranged at the same position in the long axis X1 direction. In other words, the plurality of light emitting unit rows L are aligned with each other in the long axis X1 direction, whereby the light emitting units 6 are arranged in a matrix on the facing surface 4a of the housing 4.

  According to the illuminating device 2 configured as described above, the display surface 1a of the signboard 1 can be made more uniform and more uniform by a plurality of issuing units 6 arranged in a matrix at one place where the housing 4 is located. Since it is possible to illuminate brightly, it is possible to provide a high-quality lighting device 2 at low cost.

  According to the above-described configuration, when the inclination angle α is set to be large, the upper side of the sign 1 opposite to the side where the lighting device 2 is installed is illuminated more brightly, but the length of the sign 1 in the direction of the short axis Y2 The housing 4 may be supported on the support frame 3 so that the posture thereof can be adjusted so that the optimum inclination angle α according to the angle is set.

  To describe a specific example, the distance D is 1 m, the length of the signboard 1 in the long axis Y1 direction is 4 m, the length of the signboard 1 in the short axis Y2 direction is 1 m, and the lighting device 2 is the long axis Y1 in the front view. When arranged in the center of the direction, as shown in FIG. 5, the amount of light in each direction (for example, the amount of light in the optical axis S direction) so that the luminance on the display surface 1 a side of the signboard 1 is 400 to 600 lux. 600 candela) is set, and the inclination angle α and the light distribution pattern of the light distribution lens 8 are set so that the light amount is set as described above.

Next, based on FIG. 6, a different point from the above-mentioned example is demonstrated about another embodiment of this invention.
FIG. 6A is a front view of a signboard showing another embodiment of the present invention, and FIG. 6B is a drawing showing the configuration of the light emitting surface of the light emitting device of FIG. In the example shown in the figure, a lighting device 2 to which the present invention is applied is installed on a vertically long signboard 1. Specifically, the long axis X1 of the signboard 1 is formed in the vertical direction, and accordingly, the long axis Y1 of the light distribution lens 8 and the light emitting unit row L are formed in the vertical direction. A support frame 4 is disposed on the center side in the minor axis direction X2, and a single casing 4 that is a light emitting device is provided at the position.

  In addition, a lens that enhances light in the direction of the optical axis S may be used in the illumination device 2 in combination with the light distribution lens 8 described above to illuminate the display surface 1a of the signboard 1 shown in FIG.

Next, a configuration different from the above-described example will be described for another embodiment of the present invention with reference to FIGS.
FIG. 7A is a front view of a signboard showing another embodiment of the present invention, FIG. 7B is a drawing showing the structure of the light emitting surface of the light emitting device of FIG. 8A, and FIG. It is an external view of an optical axis direction view of a light distribution lens, (B) is a B arrow view of (A), (C) is CC sectional drawing of (A). As shown in these figures, the length of the short axis X2 of the signboard 1 is longer (specifically, about twice as long) as that of FIG.

  In this case, the light distribution lens 8 shown in FIG. 3 is the first light distribution lens 8A, and the light-emitting unit 6 including the first light distribution lens 8A and the LED 7 is the second light-emitting unit 6A. A light emitting unit 6 having a second light distribution lens 8B of a different type from the light distribution lens 8A and a light distribution lens 8 is provided as the second light distribution unit 6B.

  The second light distribution lens 8B has a long axis Y1 and a short axis Y2 having different lengths in an elliptical shape when viewed in the optical axis S direction, and from the end surface on the opposite surface 4a side of the housing 4 serving as a light emitting device. The half of the dome shape that is swelled on the display surface 1a side in the optical axis S direction is formed in a shape that is cut off and rounded at the corners. In addition, the accommodating portion 8a having an isosceles triangle shape (more specifically, an equilateral triangle shape) in sectional view is a side away from the facing surface 4a toward the lower side on the display surface 1a where the lighting device 2 is installed. Is formed so as to incline sharply toward the facing surface 4a.

  FIG. 9 is a light amount distribution diagram of the second light emitting unit as viewed in the optical axis direction. According to the second light distribution lens 8B having such a configuration, the configuration in which light in the optical axis S direction is evenly distributed to both sides of the long axis X1 direction of the signboard 1 with the optical axis S as a boundary is shown in FIG. The amount of light on the strong side that is the other side increases with respect to the weak side that is one side of the short axis X2 at the boundary of the optical axis S. The light is distributed.

  And by the shape of the above-mentioned 2nd light distribution lens 8B, the lower side which is the side which installed the illuminating device 2 in the display surface 1a becomes a weak side, and the upper side which is the other side becomes a strong side. For this reason, in the direction of the short axis X2 on the display surface 1a, the side far from the illumination device 2 can be brightly illuminated by the second light emitting unit 6B.

  The first light emitting unit 6A and the second light emitting unit 6B are arranged in a matrix on the facing surface 4a of the housing 4, and are arranged along the minor axis X2 direction of the display surface 1a (specifically, parallel). A) A plurality of first light emitting units 6A are arranged in parallel at predetermined intervals (equal intervals in the illustrated example) to form a first light emitting unit row L1, and at predetermined intervals (in the drawing) along the minor axis X2 direction of the display surface 1a. In this example, the same number of second light emitting units 6B are arranged in parallel at every equal interval) to form the second light emitting unit row L2.

  A plurality of (two in the illustrated example) second light emitting unit rows L2 are formed on the center side of the display surface 1a in the long axis X1 direction, and the second light emitting unit rows L2 are formed on both outer sides in the long axis X2 direction. First light emitting unit rows L1 are formed so as to sandwich a set of light emitting unit rows L2. In other words, the second light emitting unit row L2 and the first light emitting unit row L1 are disposed adjacent to each other on the center side in the major axis X2 direction on the facing surface 1a and on the outer side thereof.

  According to the illuminating device 2 having the above-described configuration, the near-side area A, which is a side half near the illuminating device 2 in the minor axis X2 direction of the display surface 1a, is generated by the light from the first light emitting unit 6A and the second light emitting unit 6B. In addition, it is brightly illuminated, and the separated side area B, which is the side half far from the illumination device 2 in the minor axis X2 direction of the display surface 1a, is illuminated brightly by the light from the second light emitting unit 6B. For this reason, even a display body having a display surface 1a having a relatively long length in the short axis X2 direction can be easily handled with respect to the length in the long axis X1 direction.

  In the above example, as shown in FIGS. 2 and 4, the configuration in which the light emitting units 6 are arranged in 4 rows and 4 columns has been described. However, the light emitting units 6 are arranged in 6 rows and 4 columns on the facing surface 4a. It may be arranged in 8 rows.

1 signboard (display)
1a Display surface 3 Support frame (support member)
4 Case (light emitting device, projector)
6 light emitting unit 6A first light emitting unit 6B second light emitting unit 7 LED (light emitting diode)
DESCRIPTION OF SYMBOLS 8 Light distribution lens 8A 1st light distribution lens 8B 2nd light distribution lens L Light emission unit row | line | column L1 1st light emission unit row | line | column L2 2nd light emission unit row | line | column S Optical axis X1 Long axis X2 Short axis

Claims (7)

A predetermined interval is provided on the display surface (1a) side of the display body (1) having a rectangular or oval display surface (1a) having a major axis (X1) and a minor axis (X2) having different lengths in the vertical and horizontal directions. A lighting device for a display body that illuminates the display surface (1a) by irradiating the display surface (1a) with light from the light emitting device (4). (4), the light emitting device (4) is supported by the support member (3) with respect to the display body (1), and the light emitting diode (7) that emits light toward the display surface (1a) A plurality of light emitting devices (4) are provided, and light from the light emitting diode (7) is distributed so as to weaken light in the optical axis (S) direction and intensify light in the long axis (X1) direction. It provided a light distribution lens (8) to the light-emitting diode (7) each, and each light-emitting unit (6) A support member (3) is provided at the end of the display surface (1a), and a first light distribution lens (8A) that is a light distribution lens (8) that equally distributes light on both sides in the minor axis (X2) direction. 1 light emitting unit (6A) and a light distribution lens (8) that distributes light so that light on the weak side, which is the other side, is weaker than the strong side, which is one side in the short axis (X2) direction. A second light emitting unit (6B) having a second light distribution lens (8B), and each second light distribution lens (8B) so that the side on which the support member (3) of the display surface (1a) is disposed is on the weak side. ) Lighting device for display body.   2. The illumination for a display body according to claim 1, wherein a plurality of the light emitting units (6) including one light emitting diode (7) and one light distribution lens (8) are arranged in parallel along the long axis (X1) direction. apparatus.   3. The display body according to claim 2, wherein a plurality of light emitting unit rows (L), which are rows of light emitting units (6) arranged in parallel in the major axis (X1) direction, are provided in the minor axis (X2) direction. Lighting device. The illumination device for a display body according to any one of claims 1 to 3, wherein a support member (3) is arranged on a center side in the major axis (X1) direction at a lower end portion of the horizontally long display surface (1a). The illumination device for a display body according to any one of claims 1 to 3, wherein a support member (3) is arranged on the center side in the minor axis (X2) direction at the lower end of the vertically long display surface (1a). A plurality of first light emitting units (6A) are arranged in parallel in the short axis (X2) direction to form a first light emitting unit row (L1), and a plurality of second light emitting units (6B) are arranged in parallel in the short axis (X2) direction. second and emitting unit string (L2) by a first light emitting unit string (L1), claim the second light-emitting unit array and (L2) is by parallel with the long axis (X1) direction so as to be adjacent The illumination device for a display body according to any one of 1 to 5 . The display body illumination device according to any one of claims 1 to 6 , wherein the display body (1) is a signboard.

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