JP5148386B2 - Luminescent display device - Google Patents

Description

  The present invention relates to a light emitting display device in which a plurality of light emitters such as LEDs (light emitting diodes) are arranged on a printed circuit board, and decorative light emission such as electrical decoration and illumination is performed by controlling blinking of each light emitter.

2. Description of the Related Art Conventionally, a device using an LED is known as a light emitting display device used for a signboard, an amusement device, or an electric sign. For example, as shown in Patent Document 1, an accommodation recess that accommodates an LED is formed inside a translucent cover body, and a plurality of concave curved surface portions that diffuse light are formed on the inner surface thereof, which are arranged in the accommodation recess. There is a light-emitting tool that diffuses light emitted from the LED in the direction of the peripheral side surface of the translucent cover body. Further, as shown in Patent Document 2, a decorative LED is formed around a display unit in which LEDs are arranged in a grid pattern to form a decorative part. There is also a display device that is covered with a light diffusing plate and diffuses light in the same direction in which the LEDs are arranged by the light diffusing plate.
JP-A-9-258676 JP 2003-280534 A

  In the light-emitting tool described in Patent Document 1, a concave curved surface part is formed on the inner surface of the light-transmitting cover body, and the entire light-emitting tool is diffused by allowing LED light to pass through the light-transmitting cover body and diffuse to the peripheral side part. I try to shine. However, since the concave curved surface portion for diffusing the light of the LED has a structure that is continuously provided only on the inner surface of the translucent cover, it is not sufficient to emit light in a uniform state of the entire cover body. . The plurality of concave curved surface portions continuously provided on the inner surface of the cover body form a groove having an arc cross section in the short direction of the inner surface of the cover body, so that the light emitted from the LED lamp is continuously in the longitudinal direction of the groove. As a result, light is diffused continuously in the short direction of the case body for each concave curved surface portion, and light is discontinuously viewed in the longitudinal direction of the case body. . Although light is also incident on the concave curved surface portion located between the LED lamps, it is light that leaks from the adjacent concave curved surface portion or light that is spread and irradiated from the LED lamp, so the longitudinal direction of the case body The light emitting groups that are viewed side by side in a discontinuous state gradually become darker as they move away from the LED lamp, and accordingly, when the entire cover body is viewed, uneven brightness occurs in the longitudinal direction of the cover body.

  Also in the display device described in Patent Document 2, the light diffusion plate for covering the decoration LED has unevenness for light diffusion (corresponding to the concave curved surface portion of Patent Document 1) continuously formed in the LED arrangement direction. It still has the same problem as Patent Document 1.

  In such a conventional device using the light diffusion effect, when the light diffusing cover body receives strong light such as sunlight, the light is scattered on the surface of the cover body or the inner concave curved surface and recognized as whitish. There was a problem that the light emitted from the LED could hardly be recognized.

  The present invention has been made in response to the above-described conventional problems, and continuously diffuses and emits light from an LED arranged while keeping a predetermined distance in the LED array direction as much as possible. An object of the present invention is to provide a light emitting display device in which the visibility of light emitted from an LED does not deteriorate even when irradiated.

  In order to achieve the above object, in the light emitting display device according to claim 1, a plurality of light emitters arranged on a substrate are continuously covered with a tunnel-shaped light-transmitting cover body for each of the plurality, and the light emitters blink. In the light-emitting display device that performs decorative light-emitting display by controlling, a plurality of first cylindrical lenses formed on the light-transmitting cover body on the outer surface of the light-transmitting cover body along the longitudinal direction or the short-side direction of the light-transmitting cover body A plurality of second cylindrical lenses formed on the inner side surface of the translucent cover body along a direction orthogonal to the formation direction of the first cylindrical lens, and the translucency corresponding to the position of the light emitting body covered by the translucent cover body A third cylindrical lens having a lens width larger than that of the first cylindrical lens and the second cylindrical lens is formed on the outer surface or the inner surface of the cover body, and the front surface of the light emitter. It is characterized in that the outer surface and inner surface of the translucent cover of a position facing does not form the first cylindrical lens and second cylindrical lens.

  In the light emitting display device of the present invention, the longitudinal direction of the third cylindrical lens is the same as the formation direction of the first cylindrical lens or the second cylindrical lens formed on the same surface as the surface on which the third cylindrical lens is formed. It is characterized by doing.

  According to the first aspect of the present invention, the plurality of light emitters arranged on the substrate are covered with the tunnel-shaped light transmitting cover body, the first cylindrical lens is formed on the outer surface of the light transmitting cover body, and the first cylindrical lens is formed on the inner surface. Two cylindrical lenses are formed. The first cylindrical lens and the second cylindrical lens form a lens so that the axial directions of the semi-cylindrical shapes are orthogonal to each other, and the outside of the translucent cover body corresponding to the position of the light emitter disposed on the substrate. A third cylindrical lens having a lens width larger than the lens width of the first cylindrical lens and the second cylindrical lens is formed on the side surface or the inner side surface, and the outer surface of the translucent cover body at a position facing the front surface of the light emitter. In addition, the first cylindrical lens and the second cylindrical lens are not formed on the inner surface. With such a structure, the light irradiated from the light emitter is first incident on the second cylindrical lens formed on the inner surface of the translucent cover body and refracted, and the width dimension of the cross section having the curvature of the second cylindrical lens. Diffuses in the axial direction of the lens with (lens width dimension). Next, light that has passed through the inside of the translucent cover body and reached the outer surface side is refracted by the first cylindrical lens, and is diffused in the axial direction of the lens with the cross-sectional width dimension having the curvature of the first cylindrical lens. However, the light is emitted toward the outside of the translucent cover body. Since the first cylindrical lens and the second cylindrical lens are perpendicular to each other in the axial direction of the lens, a plurality of light beams that diffuse linearly in the axial direction of the lens are viewed perpendicularly. The light of the illuminant viewed through the cover body can be emitted in a continuous state in both the longitudinal direction and the transversal direction of the translucent cover body. In particular, since light is diffused in a continuous state in the longitudinal direction of the translucent cover body, it is possible to prevent uneven brightness from occurring in the direction in which the LEDs are arranged.

  In addition, since a third cylindrical lens having a large lens width is formed at a portion of the light emitting cover body that covers the light emitting body, the bright light that is emitted directly from the light emitting body when the light emitting cover body is viewed from the outside. Can be visually recognized by expanding the lens width of the third cylindrical lens. As a result, while the entire light emitting cover body emits light, it is possible to make brighter strip-shaped light appear at regular intervals, and to obtain an accent effect on the decorative display. In addition, the first cylindrical lens and the second cylindrical lens are not formed at a position facing the light emitter of the light emitting cover body, so that the first cylindrical lens emits light with strong brightness irradiated directly in front of the light emitter. The second cylindrical lens can be directly irradiated to the outside without being refracted. As a result, even in the situation where strong light such as sunlight shines on the light emitting cover body, the direct light irradiated from the front of the light emitting body can be kept visible, and light is emitted by scattering of external light. It is possible to prevent the entire cover from being invisible.

(Embodiment 1)
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing the appearance of an embodiment of the present invention. The light-emitting display device 1 of the present invention includes an LED 3 mounted on the surface of a printed board 2 and capable of emitting multiple colors, a light-transmitting cover 4 that covers the LED 3 in a tunnel shape, and a light-emitting drive circuit ( (Not shown in the figure). The light emission drive circuit has a function to drive light emission while changing the light emission luminance, blinking timing, or light emission color of the LED 3 based on preset light emission display pattern data, enabling various decorative displays. Yes.

  A plurality of LEDs 3 are arranged in a straight line with a predetermined distance on the printed circuit board, and the linearly arranged LEDs are continuously covered by a long translucent cover body 4. The cross-sectional shape of the translucent cover body 4 in the short direction is a substantially semicircular tunnel shape so as to continuously cover the upper side from the side of the LED 3. A plurality of 4 a formed on the outer surface of the translucent cover body 4 is a first cylindrical lens, and the axis of the lens having a semi-cylindrical shape is formed along the longitudinal direction of the translucent cover body 4. The first cylindrical lens 4a is formed so as to be closely adjacent without gap from one side end to the other side end of the translucent cover body 4 in the short direction, and the LED 3 is formed from the inside of the translucent cover body 4. The radiated light is diffused linearly in the longitudinal direction of the cover body while being refracted according to the curvature of the lens.

  On the other hand, a plurality of 4b formed on the inner surface of the translucent cover body 4 is a second cylindrical lens, which is formed along the inner surface of the tunnel shape while aligning the lens axis in the short direction of the translucent cover body 4. doing. The second cylindrical lens 4b is formed so as to be closely adjacent without gaps from one end to the other end in the longitudinal direction of the translucent cover body 4, and the cover body while refracting the light emitted by the LED 3 according to the curvature of the lens. Diffuses linearly in the short direction.

  Reference numeral 4 c denotes a third cylindrical lens, which is formed on the inner surface of the translucent cover body 4 in the same manner as the second cylindrical lens 4 b. However, the third cylindrical lens is formed only at a position facing the LED 3 on the inner side surface of the translucent cover body 4, and the width of the lens seen from the arcuate section of the cylindrical lens is larger than the second cylindrical lens. Have dimensions. The lens width dimension of the third cylindrical lens is set to a dimension that is at least larger than the width dimension of the LED 3, and the light irradiated from the LED 3 while spreading is refracted within the lens width of the third cylindrical lens, and in the axial direction of the lens. Spread against it. Thereby, the direct light of strong brightness emitted from the LED 3 is condensed linearly in the lens axial direction with the lens width of the third cylindrical lens 4c, as compared with the case where no lens is formed as shown in FIG. When the translucent cover body 4 is viewed from the outside, the direct light emitted from the LED 3 spreads to the lens width and is visually recognized. Incidentally, the lens width of the first cylindrical lens and the lens width of the second cylindrical lens are smaller than the vertical and horizontal dimensions of the LED 3, and the light emitted from the LED 3 when the translucent cover body 4 is viewed from the outside. The light transmission cover body 4 is not in a state where the light transmission cover 4 emits light in some places, but rather the light transmission cover body 4 as a whole emits light as a surface. Yes.

  On the lens outer surface of the translucent cover body 4, a smooth portion 4 d is formed at a location corresponding to the LED 3. The smooth part 4d is a part in which a flat surface having no lens structure is formed while the plurality of first cylindrical lenses 4a are formed on the entire outer part of the translucent cover body 4. Not equipped. The smooth portion 4d is formed in a rectangular shape, and the vertical and horizontal dimensions may be any size as long as the light emitting portion of the LED 3 positioned immediately below the smooth portion can be confirmed without being hidden. Further, the dimension of the smooth portion 4d corresponding to the longitudinal direction of the translucent cover body 4 is preferably a dimension that can be accommodated within the range of the lens width of the third cylindrical lens formed on the inner surface side of the translucent cover body 4. . By doing so, the light emitted while spreading from the LED 3 is refracted by the third cylindrical lens, and is emitted from the smooth portion 4d in a state where the light emission direction is aligned with the direction perpendicular to the surface of the smooth portion 4d. Become. Accordingly, the light emitted from the LED 3 can be viewed with higher brightness with respect to the front direction of the smooth portion 4d, and even in a situation where strong light such as direct sunlight is radiated to the translucent cover body 4, smoothing is possible. The light of LED3 can be visually recognized through the part 4d.

  2A and 2B are diagrams showing the translucent cover body 4. FIG. 2A is a plan view, FIG. 2B is a side view, and FIG. 2C is a bottom view. As described with reference to FIG. 1, a plurality of first cylindrical lenses 4 a having lens axes formed along the longitudinal direction of the cover body are closely arranged on the outer surface of the translucent cover body 4. A smooth portion 4d having a size that fits in the lens width of the third cylindrical lens 4c is formed corresponding to the LED 3 arranged on the inner side. Further, the second cylindrical lens 4b having a lens axis formed along the short side direction of the cover body 4 is closely adjacently disposed on the inner side surface of the translucent cover body 4, and the position corresponding to the position where the LED 3 is disposed The third cylindrical lens 4c is formed with a wide lens width.

  Next, FIG. 3 shows a state in which the light emitting display device configured as described above is subjected to light emission display. When the LED 3 emits light, the first cylindrical lens 4a and the second cylindrical lens 4b act to diffuse light linearly in the longitudinal direction and the short side direction of the translucent cover body 4 so that the entire translucent cover body 4 is a surface. It emits light. At the same time, a light emitting group that receives the direct light emitted from the LED 3 and has the lens width of the third cylindrical lens 4 c is significantly brighter on the outer side of the translucent cover body 4. Further, in the light emitting group due to the action of the third cylindrical lens 4c, a brighter light emitting point is visually recognized at the position where the smooth portion 4d is formed, and as a result, the entire translucent cover body 4 is uneven. While light is emitted in the absence, a band-like light emitting group appears at regular intervals, and when the band-like light emitting group is viewed from the front of the translucent cover body 4, an extremely bright light emitting point is visually recognized. Therefore, in the use state where the outside light is not irradiated to the translucent cover body 4 as well as at night when the surroundings are dark, the light of the spaced LED is diffused throughout the translucent cover body 4 to form a tube shape. The light-emitting display effect is obtained, and even under adverse conditions such as direct sunlight, the top of the light-transmitting cover 4 is very bright in the direction of viewing from the front. The illumination display effect that emits the light can be obtained.

  The present invention is configured as described above, but various implementations are possible without being limited to the above-described embodiments without departing from the scope of the claims. For example, the cross-sectional shape of the translucent cover body 4 in the short side direction may be other shapes such as an inverted V shape or a concave U shape, and the overall shape does not need to be a long straight line and has a curved portion. Also good shape. Alternatively, the lens axis of the first cylindrical lens 4a may be formed along the short side direction of the outer surface of the light-transmitting cover body 4, and the third cylindrical lens 4c may be formed in the short direction of the outer surface. In that case, it is necessary to form the second cylindrical lens 4b along the longitudinal direction on the inner surface of the translucent cover body 4, and it is also necessary to form the smooth portion 4d at a position directly above the LED on the inner surface. In the above embodiment, the LED 3 is illustrated as a surface mount type, but a lamp type can also be implemented.

  The present invention can be used alone for signboards, amusement equipment, electric signs, etc., and can also be used as a decorative display unit of a display device including an information display unit in which LEDs are arranged in a dot matrix in a grid pattern. is there. In that case, it is possible to arrange the dot matrix information display portion so as to surround the periphery of the dot matrix information display portion, and it is also possible to arrange the dot matrix information display portion only at appropriate places around the information display portion.

It is explanatory drawing which shows the external appearance of the light emission display apparatus which concerns on an Example of this invention. It is explanatory drawing which shows the external appearance of a translucent cover body. It is explanatory drawing which shows the light emission display image of the light emission display apparatus which concerns on an Example of this invention. It is explanatory drawing which shows the display effect by a 3rd cylindrical lens.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light-emitting display apparatus 2 Printed circuit board 3 LED which is a light-emitting body
4 translucent cover body 4a 1st cylindrical lens 4b 2nd cylindrical lens 4c 3rd cylindrical lens 4d Smoothing part

Claims (2)

In a light-emitting display device that performs decorative light-emitting display by continuously covering a plurality of light-emitting bodies arranged on a substrate with a tunnel-shaped translucent cover body for each plurality, and controlling the blinking of the light-emitting bodies,
In the translucent cover body,
A first cylindrical lens formed on the outer surface of the translucent cover body along the longitudinal direction or the short side direction of the translucent cover body;
A plurality of second cylindrical lenses formed on the inner side surface of the translucent cover body along a direction orthogonal to the forming direction of the first cylindrical lens;
Forming a third cylindrical lens having a lens width larger than that of the first cylindrical lens and the second cylindrical lens on the outer surface or the inner surface of the light transmitting cover body corresponding to the position of the light emitting body covered with the light transmitting cover body; A light-emitting display device, wherein the first cylindrical lens and the second cylindrical lens are not formed on an outer side surface and an inner side surface of a light-transmitting cover body at a position facing a front surface of the light-emitting body.   The longitudinal direction of the third cylindrical lens is the same as the formation direction of the first cylindrical lens or the second cylindrical lens formed on the same surface as the surface on which the third cylindrical lens is formed. Luminescent display device.

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