JPWO2005073944A1 - Display device - Google Patents

Abstract

It is possible to form a three-dimensional and highly visible drawing inside the transparent member.
In the display device 1, a light reflection portion 6 is formed inside a display body 2 made of a light-transmitting material, and the light reflection portion 6 is formed in the display body 2 in a plurality of three-dimensional spaces 7. Therefore, it is formed. Each void 7 has a void body 7A and a linear void 7B extending in one direction from the void body. When the light enters the inside of the optical display body 2 from the light entrance part 3, the light is diffusely reflected by the voids 7 forming the light reflecting part 6 and emitted from the light emitting surface 5, and each void 7 inside the display body 2. Looks like it's shining. The light that has entered each of the voids 7 is guided from the void body 7A to the linear voids 7B and is reflected to the periphery during that time, so that high visibility is obtained. Further, since the light enters the inside of the display main body 2 due to the directional configuration and arrangement of the air gap 7, the entire light reflecting portion 6 is effectively displayed.

Description

  The present invention relates to a display device. More specifically, the present invention relates to a display device used for a show window, a wall window, a showcase, a signboard, or the like formed of a transparent material having a light transmitting property.

  Conventionally, when a drawing part is formed inside a member formed of a transparent material such as glass or acrylic resin, the member is divided into two parts, and the drawing part is printed on the inner surface by silk printing or the like. A method of pasting and a method of sandwiching a separate drawing unit between members separated in two have been used. However, in these methods, since the members are divided and then bonded, the number of manufacturing steps is large, but it is impossible to manufacture a refined product, and there is a problem that it is expensive. Further, when the drawing portion is formed by printing, there is a problem that the printing peels off or deteriorates with age.

  In recent years, a method has been developed and used in which a transparent member is irradiated with laser light to form a groove inside the member, and a character, a pattern, a painting, a pattern or the like is formed by the groove (for example, see Patent Document 1). ). When this method is used, since the drawing portion is a groove formed inside the member, it does not deteriorate over time, and if the laser light for processing the groove is made thin, an extremely fine groove of about 50 microns can be formed. Therefore, very precise and beautiful characters can be formed. Then, when light is incident on a member on which characters and the like are formed by this method, the light is reflected on the side surface of the groove and the like, so that it is possible to give the impression that characters and the like are emitting light inside the member. The drawing part can be made more beautiful.

  There is also a method of irradiating a laser beam to form a plurality of holes penetrating between the front surface and the back surface of the member, and forming letters or the like by the aggregation of the plurality of holes (for example, see Patent Document 2). .. Also in this case, when the member is irradiated with light, the light is reflected on the inner surfaces of the plurality of holes, so that it is possible to give the impression that characters or the like are emitting light, and to make the drawing portion more beautiful. ..

  Furthermore, there is also a method of irradiating a laser beam to form voids inside the member or forming an altered layer to form letters, patterns, etc. by the voids (see, for example, Patent Documents 3 to 5). ). Also in this case, when the member is irradiated with light, the light is reflected in the voids and the cracks formed around the voids, so that it is possible to give the impression that characters are present inside the member. ..

JP, 2002-36800, A JP 2002-111197 A JP, 2003-12346, A JP, 2002-87834, A Japanese Patent Laid-Open No. 11-267861

  However, in the method of Conventional Example 1, since the groove having a predetermined shape is formed inside the member, the light incident on the member is reflected only at the peripheral portion of the groove. Then, the outer edge of the drawing portion becomes clear, but the interior thereof does not emit light, so that the drawing portion cannot give a stereoscopic effect.

  Further, in the case of the method of Conventional Example 2, since the drawing portion is formed by a set of holes, the entire drawing portion can be made to shine, but since the hole penetrates the member, the vicinity of the central portion of each hole There is no light emission from, and since the shadow of the drawing portion cannot be formed on the surface opposite to the side viewed by the person, the drawing portion also cannot have a stereoscopic effect. Moreover, if dust or the like collects in the holes, it becomes dirty, and cleaning is extremely difficult when dust or the like is accumulated.

  Further, the member manufactured by the method of Conventional Example 2 cannot be used for a show window or the like facing a road surface because the front surface and the back surface thereof are communicated with each other by holes, and the application is limited.

  Further, in any of the conventional examples 1 and 2, since the surface on which light is incident is not specially processed, the incidence efficiency of light on the member is low. Then, there is a problem that a sufficient light emitting effect cannot be obtained unless the intensity of incident light is increased.

  When the void is provided inside the member, the problems as shown in the conventional examples 1 and 2 do not occur, but if the pattern is simply formed by the void, the light reflected by the void and the light emitted from the member becomes weak. , It is difficult to see the pattern three-dimensionally.

  In view of such matters, the present invention can form a three-dimensional drawing with high visibility inside a member formed of a transparent material, can be used at any place, and can be incident on the member. An object of the present invention is to provide a display device which can improve efficiency and save energy.

  The display device of the present invention has the following features.

  Firstly, a display main body having a light emitting surface and formed of a light-transmissive material, and a light reflecting portion formed inside the display main body and reflecting light incident on the display main body. In the device, the light reflecting portion is formed by a plurality of voids formed three-dimensionally inside the display body, and each void is a void body portion and a linear shape extending in one direction from the void body portion. And a void portion.

  According to this, when light is incident on the inside of the display main body and reaches the light reflecting portion through the inside of the main body, the light is diffusely reflected by the void forming the light reflecting portion and is emitted from the light emitting surface. Then, since it appears that each void is shining inside the display main body, a drawing with high visibility can be formed inside the member. Moreover, the position where the air gap shines in the display body becomes three-dimensional, and a stereoscopic effect can be generated in the drawing formed by the light reflecting portion. Further, since the position and the overlap of the voids can be freely adjusted, the degree of freedom of the pattern of the light reflecting portion can be increased. Furthermore, since the light reflecting portion is formed by a plurality of voids, no large unevenness is formed on the surface of the light emitting portion. As a result, irregular reflection at the light emitting portion can be suppressed, so that the form of the light reflecting portion can be displayed clearly and neatly. Moreover, since it is a void in the display body and there is no hole penetrating the display body, it is possible to use even a show window formed on an outer wall or the like. Further, since the position and number of the light reflecting portions to be formed, their overlapping, and the like can be freely adjusted, the degree of freedom of the pattern of the light reflecting portions can be increased.

  Further, since each void forming the light reflecting portion has a void main body and a linear void extending in one direction from the void main body, by matching its directionality with the incident direction of light, a wide light While forming the diffusion surface, the area for blocking the progress of light can be narrowed, and the light can be further propagated to the inside of the display main body so that the void inside the display can be illuminated more. Also, if the void body is placed on the light incident side, part of the light is made incident into the void body and guided while repeating reflection in the void body and the linear void, and scattered light is generated between them. Since the light is emitted to the periphery, the light can be effectively emitted to the periphery.

  Secondly, in addition to the first feature, a thin film having a spectral function is formed on the inner surface of the void body.

  According to this, light incident on the void is reflected by the spectral function of the thin film formed on the inner surface of the void main body, and is emitted from the light emitting surface of the display main body. In addition, multicolor reflected light can be obtained, and a light reflecting portion having high decorativeness can be formed.

  Thirdly, in addition to the first feature, the plurality of voids have a size of 10 to 300 μm, and a distance between adjacent voids is 10 to 150 μm.

  According to this, since the light reflection state in the air gap and the light reflection in the air gap can be optimized, the visibility of the light reflection portion can be increased, and light of various wavelengths can be reflected. Can be spectrally separated.

  Fourthly, in addition to the first to third characteristics, the plurality of voids are arranged so that a shape formed by the plurality of voids can be uniformly illuminated.

  According to this, since the shape formed by the voids uniformly shines, the visibility of the entire shape can be improved.

  Fifthly, in addition to the first to fourth features, a void group in which a plurality of voids are arranged is formed along a surface intersecting the light emitting surface, and the void group is formed in a plurality of layers. In the adjacent void groups, the voids forming the other void group are surrounded by the adjacent voids configuring the one void group when viewed from the direction normal to the surface on which the one void group is formed. It is characterized in that it is formed so as to be arranged in the region.

  According to this, when viewed from the direction normal to the surface on which one void group is formed, the void density becomes high. For this reason, the amount of light reflected from the light emitting surface is increased, and the shape formed by the voids can be made to uniformly illuminate, so that the visibility of the light reflecting portion is improved. Moreover, since the gaps between the voids are reduced, the three-dimensional effect of the light reflecting portion can be further enhanced.

  Sixth, in addition to the fifth feature, the linear void portion formed in the void of one void group of the adjacent void groups is parallel to the surface on which the one void group is formed. It is characterized in that it is formed so as to intersect with the linear voids formed in the voids of the other void groups when viewed from another direction.

  According to this, it is possible to increase the probability that the light that has entered the display body is reflected in the linear void portion, so that the light that has entered the display body is dispersed while being repeatedly reflected in the linear void portion, and the The void can be made to shine in multiple colors. Then, when viewed from the direction in which the linear void portions overlap with each other, the light amount of the light reflected by the linear void portions increases, so that the visibility of the linear void portions can be increased, and the linear void portions can be displayed even in natural light. You can see that it is shining in multiple colors.

  Seventh, in addition to the first to sixth features, the display body includes a light entrance portion formed so that its normal line intersects with the normal line of the light emitting surface. Is incident.

  According to this, when light is incident on the light incident portion from the light emitter, the light reflection portion can be illuminated by the light. Further, when the light incident section is subjected to the light incident adjusting process, the light reflecting section can be caused to emit light in a desired state depending on the processing state.

  Eighth, in addition to the seventh characteristic, the light incident from the light incident portion is incident from the single or plural light emission points toward the light reflection portion at a predetermined radiation angle. To do.

  According to this, the light reflecting portion can be made to shine within a range in which each light emitting point spreads at a predetermined radiation angle.

  Ninth, in addition to the eighth characteristic, the linear void portion is formed along the incident direction of the light incident from the light incident portion.

  According to this, since the linear void portion of the void is formed along the incident direction of the light incident from the incident portion, the cross-sectional area of the void that blocks the progress of the incident light becomes small, and the light is displayed. The light can be made to enter the inside of the main body, and the void inside can be made to shine by the light emitted from one light emitting point.

  Tenth, in addition to the eighth feature, the light reflecting portion has a partial reflection area that reflects light emitted from the specific light emission point, and the specific light emission point is provided in the partial reflection area. And the linear void portion of the void is formed along an extension direction of a straight line connecting the void and the void.

  According to this, in the partial reflection region that reflects the light emitted from the specific light emitting point, since the linear void portion of the void is formed along the extension direction of the straight line connecting the light emitting point and the void, The light emitted from the light emitting point can be effectively reflected, and the light can be further advanced to the inside of the display main body to effectively illuminate the void inside.

  Eleventh, in addition to the eighth to tenth features, a feature is that light of a specific color is emitted for each of the specific light emission points.

  According to this, since light of different colors can be emitted from each light emission point, the light reflecting portion can be a partial reflection region for each different color. This can further enhance the decorative effect of the light reflecting portion.

  Twelfth, in addition to the eighth to eleventh features, the light emitted from a plurality of light emission points is incident on one of the partial reflection areas, and the partial reflection area is provided for each of the plurality of light emission points. The linear void portion of the void is formed along the extending direction of the straight line connecting the light emitting point and the void corresponding thereto.

  According to this, it is possible to effectively reflect the light emitted from the plurality of light emitting points in one partial reflection area, and to emit the light of different colors from the plurality of light emitting points. By mixing and reflecting in one partial reflection area, a color mixture of these colors can be obtained.

  Thirteenth, in addition to the eighth to twelfth features, the light incident part is provided with a concave portion which is recessed inward, and the light emitting point is arranged inside the concave portion. ..

  According to this, the area on which the light is incident can be increased, so that the incidence efficiency of the light emitted by the light-emitting body disposed at the light emission point can be increased, for example. In addition, since the inner surface of the recess functions as a lens, the region in which the light incident from the light emitter is diffused can be adjusted by adjusting the radius of curvature of the inner surface of the recess. Therefore, it is possible to easily and surely adjust the shining state of the light reflecting portion to a desired state.

  Fourteenth, in addition to the thirteenth feature, a plurality of the recesses are provided in the light incident part.

  According to this, the intensity of the light-emitting body provided in each recess, the wavelength of light, the emission timing, and the like can be changed, so that the drawing of the light-reflecting portion can be made more beautiful.

  Fifteenthly, in addition to the seventh to fourteenth features, the surface roughness of the light incident portion is 0.100 μm or less.

  According to this, the surface roughness of the light incident part is 0.100 μm or less in terms of the center line average roughness, that is, the surface is processed to be a mirror surface or a state close to it, so that the irregular reflection of light on the surface of the light incident part is ensured Since it can be suppressed, the incidence efficiency can be increased, the structure of the device can be made compact, and energy can be saved. In particular, it is preferable to set the surface roughness of the light incident part to about 0.035 to 0.08 μm, because visible light can be efficiently incident on the surface without extremely improving the processing accuracy.

  Sixteenth, in addition to the seventeenth to fourteenth features, the light entrance portion is provided with a plurality of lenses, and light is incident on the inside of the display main body through the lenses.

  According to this, since the width of the light flux of the light incident from the light emitting body can be adjusted by the lens, it is possible to freely adjust the diffused focusing of the incident light. Therefore, the light emitting state of the light reflecting portion can be easily and surely adjusted to a desired state. When a lens capable of condensing light is used as the plurality of lenses, the intensity of light emitted to the light reflecting portion can be increased, so that the light emitting intensity of the light reflecting portion can be increased. The structure of the device can be made compact and energy can be saved.

  Seventeenth, in addition to the seventh to fourteenth features, the light entrance part is characterized in that its surface is formed in a diffused state.

  According to this, if the diffusion process is performed, the light incident from the light-emitting body can be diffusely reflected on the surface of the light incident portion. Then, the incident light can be spread over almost the entire area of the display body.

  Eighteenth, in addition to the seventh to fourteenth features, a prism is arranged in the light entrance portion, and a light source for supplying light to the prism is arranged.

  According to this, if light is made incident on the prism, even white light can be split into light of multiple wavelengths, so even if an ordinary fluorescent lamp or the like is used as a light source, the light reflecting portion can emit light of multiple colors. Light can be incident. For this reason, even if the light source used conventionally is used, the drawing can be made to shine in a plurality of colors, the structure of the device can be simplified, and the device can be manufactured at low cost.

  Nineteenth, in addition to the eighth to thirteenth features, a light emitting diode is arranged at the light emitting point.

  According to this, if a light emitting diode is used, intense light can be generated even if it is small and consumes little power. Since the light emitting diode has a long life, it does not need to be replaced frequently, which facilitates maintenance.

  Twentieth, in addition to the eighth to thirteenth features, the other end of the optical fiber whose one end is connected to the light source is arranged at the light emitting point.

  According to this, the light emitted from the light source is transmitted to the display body by an optical fiber. Therefore, since the light source can be installed at a position away from the display body, the degree of freedom of the light source used can be increased. Further, since it is only necessary to provide the display body with the optical fiber, the installation space of the display body can be reduced, and the flexibility of the installation place, the shape of the display body, and the like can be increased.

  Twenty-first, in addition to the first to twentieth features, the light emitting surface is characterized in that it is formed in a diffused state.

  According to this, since the diffuse reflection on the light emitting surface of the display body increases, a blinding effect can be obtained by the display body.

It is a schematic explanatory drawing of the display apparatus which concerns on embodiment of this invention. It is a schematic explanatory drawing of the display apparatus concerning the embodiment of the present invention, (A) is a front view and (B) is a BB sectional view of (A). It is explanatory drawing which showed the display main body in other embodiment of this invention. It is explanatory drawing which showed the form and effect|action of the space|gap in embodiment of this invention. It is a schematic enlarged view of the light reflection part in the display main body in the embodiment of the present invention. It is a schematic enlarged view of the light reflection part in the display main body in the embodiment of the present invention. It is a schematic enlarged view of the light reflection part in the display main body in the embodiment of the present invention. It is explanatory drawing which shows the display apparatus in other embodiment of this invention. It is explanatory drawing which shows the display apparatus in other embodiment of this invention.

  Next, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic explanatory view of a display device 1 of this embodiment. 2A and 2B are schematic explanatory views of the display device 1 of the present embodiment, where FIG. 2A is a front view and FIG. 2B is a sectional view taken along line BB of FIG. In the figure, reference numeral 2 indicates a display body of the display device 1 of the present embodiment. The display main body 2 is used for show windows, signboards, etc., and various shapes such as a flat plate shape, a cylindrical shape, a conical shape, a spherical shape, and a film shape can be adopted, and the shape is not particularly limited. Absent.

  The material of the display body 2 is, for example, glass, plastic such as acrylic resin, crystal, or the like, but is not particularly limited as long as it is a material that transmits light. Further, the display main body 2 may be a flexible film-like one, or may have a specific color with the display main body 2 itself mixed with a pigment or the like.

  As shown in FIG. 2, the display body 2 includes a light emitting surface 5 and a light incident portion 3 on the surface thereof.

  The light emitting surface 5 is a surface formed so that the light passing through the inside of the display main body 2 can be emitted to the outside, and is normally processed to be a smooth surface.

  The light incident portion 3 is formed so that the normal line of its surface intersects the normal line of the light emitting surface 5. Specifically, as shown in FIGS. 1 and 2, when the display body 2 has a flat plate shape, when the light emitting surfaces 5 are formed on both the front and rear surfaces of the display body 2, the light entrance part 3 is a side surface of the display body 2. It is provided on the upper and lower surfaces.

  1 and 2, the light entrance portion 3 is formed only on one side surface of the display body 2, but the light entrance portion 3 may be provided on both side surfaces, or instead of the side surface, the upper and lower surfaces. It may be provided on both sides and all of the upper and lower surfaces, that is, on the entire peripheral surface of the display body 2.

  Furthermore, in the case where the display body 2 has a cylindrical shape, the side curved surface can be used as the light emitting surface 5 if the end face in the central axis direction is used as the light incident portion 3, and the display body 2 is In the case of a spherical surface, all the normal lines on the surface intersect at the center of the sphere, so that the surface can function as both the light incident portion 3 and the light emitting surface 5.

  The light entrance part 3 is formed with a plurality of recesses 4 which are recessed from the surface thereof toward the inside of the display main body 2. Inside the light entrance part 3, a light-emitting body for injecting the light BM toward the inner surface of the recess 4 is formed. Ten light emitting points are arranged respectively.

  Then, the inner surface of the recess 4 is subjected to a light incident adjusting process for adjusting the state of light incident from the light emitting body 10, which will be described in detail later.

  The concave portion 4 may have a cross section perpendicular to the axial direction such as a circle, a quadrangle, a triangle, or the like, and the inner bottom portion may have a spherical shape, a cylindrical shape, a conical shape, a horizontal shape, or a flat surface. It may have any shape, such as That is, the concave portion 4 may have any shape as long as it is recessed from the surface of the light incident portion 3 toward the inside of the display main body 2.

  As shown in FIGS. 1 and 2, a light reflecting portion 6 is formed inside the display body 2. The light reflecting portion 6 is formed of a plurality of voids 7. The plurality of voids 7 are formed by the well-known laser processing technique described in the above-mentioned conventional example, and are three-dimensionally arranged inside the display body 2 (FIGS. 1 and 2). reference).

  Note that, as shown in FIG. 3, the light incident portion 3 may be a flat surface without providing the concave portion 4. In this case, since the display main body 2 can be easily processed, the device can be easily processed and can be manufactured at low cost. Then, it is preferable that the surface of the light entrance portion 3 is subjected to a light entrance adjustment process described later.

  Further, the display body 2 may have a surface other than the light emitting surface 5 as a reflecting surface. In this case, the light reflected by the light reflecting portion 6 is reflected by the reflecting surface and is emitted from the light emitting surface 5. As a result, the image formed by the light reflecting portion 6 is reflected in a complicated manner, and the decorative effect can be further enhanced.

  Furthermore, by coloring the display main body 2 in advance by mixing it with a dye, the image formed by the light reflecting portion 6 can be made to stand out in the surrounding colors, and the image is further emphasized. Will be able to.

  The display device 1 according to the embodiment of the present invention is characterized by the shape and arrangement of the void 7 described above.

  FIG. 4 is an explanatory view showing the form of the void 7 formed in the display main body 2 (FIG. 4B shows an enlarged view of a portion A in FIG. 4A). The void 7 has a void body 7A and a linear void 7B. The void body 7A and the linear void 7B form a gas space communicating with each other, and a crack-shaped light diffusing surface is formed on the outer periphery thereof.

  Therefore, when the light BM enters the display main body 2, the incident light BM reaches the light reflecting portion 6 through the inside of the display main body 2, but the void 7 forming the light reflecting portion 6 is formed. As a result, the light BM is diffusely reflected, and a part of the light BM is emitted from the light emitting surface 5.

  At this time, since it has directivity, by making the directivity coincide with the incident direction of the light BM, it is possible to narrow the area that blocks the progress of the light BM while forming a wide light diffusion surface. Therefore, the light BM can be further advanced to the inside, and the void 7 inside can be illuminated.

  Further, if the linear voids 7B are arranged so as to be symmetric with respect to the symmetry line or the symmetry point of the display main body 2, the light reflecting portion 6 can be viewed from either the left or right or the surroundings. You will be able to see the design with high visibility.

  Further, if the air gap body portion 7A is arranged on the incident side of the light BM, part of the light BM is incident on the air gap body portion 7A as shown in FIG. The light is guided while being repeatedly reflected in the void 7B, and the scattered light is emitted to the periphery during that time, so that the light can be effectively emitted to the periphery.

  The void 7 having such a shape can be formed by condensing the laser light at a position where the light reflecting portion 6 is formed in the display body 2, and at this time, it is formed on the extension line of the incident direction of the laser light. The linear void portion 7B will be formed. Further, at this time, it is known that the thin film 7a having various refractive indexes and film thicknesses is formed on the inner surface of the air gap body portion 7A (see FIG. 4B), and such a thin film 7a has a spectrum. Depending on the function, when the light BM that has entered the space body portion 7A is white light (or natural light), it is split into various colors and emitted from the light emitting surface 5. According to this, the light reflecting portion 6 can be colored in multiple colors, and the decorative effect can be further enhanced.

  Such a void 7 increases the reachability of the light BM that has entered the optical display main body 2 to the inside, and more effectively reflects the light BM, so that it is formed by a plurality of voids 7. The entire light reflecting portion 6 that shines shines inside the display body 2, and it is possible to form a beautiful drawing with high visibility on the display body 2. Moreover, since the light emitting surface 5 of the display body 2 is usually formed as a smooth surface, it is possible to prevent the light BM reflected by the light reflecting portion 6 from being irregularly reflected on the light emitting surface 5. The shape of the reflection part 6 can be displayed more clearly and neatly. Since the void 7 does not penetrate the display main body 2, it is possible to use even a show window formed on the outer wall or the like.

  In each of the voids 7, the light reflected from the void body 7A and the linear void 7B forms a continuous light pattern, so that the light reflecting portion 6 is illusionary as compared with the case of only the spherical void. Can be illuminated. Moreover, by arranging the linear void portions 7B in the gaps between the voids 7, it is possible to illuminate a portion that was not illuminated by the voids 7 alone, so that the stereoscopic effect of the light reflecting portion 6 can be further emphasized. .. If a space is formed in the linear void portion 7B, the light that has entered the linear void portion 7B will also be diffusely reflected in the linear void portion 7B, so the light reflected by the linear void portion 7B. The amount of light is increased, and the visibility becomes higher. Then, depending on the shape of the linear void portion 7B, light is dispersed at this portion, and even if the display body 2 is colorless and transparent, the portion of the linear void portion 7B can be colored.

  Furthermore, the light emitting surface 5 of the display main body 2 may be formed in a state where there are many irregular reflections on the surface, that is, in a diffused state. In this case, the form of the light reflecting portion 6 can be visually recognized, but the light emitting surface 5 of the display body 2 is in a state like frosted glass, so that the display body 2 can provide a blinding effect. In this case, since the light BM reflected by the light reflecting portion 6 is diffusely reflected by the light emitting surface 5, the shape of the light reflecting portion 6 is not clearly displayed, but is displayed in a vague state. It is suitable as an indoor display that can give a fantastic soft impression and calm people's feelings.

  Further, since the light reflecting portion 6 is formed by arranging a plurality of voids 7 in a three-dimensional manner, the position where the void 7 shines in the display body 2 becomes three-dimensional and is formed by the light reflecting portion 6. It is possible to give a stereoscopic effect to drawing. Moreover, since the light BM reflected by the light reflecting portion 6 is further reflected by the light emitting surface 5 on the side opposite to the side viewed by a person, the shadow of the light reflecting portion 6 is formed on the light emitting surface 5 on the opposite side. It can be given to those who see the impression that they are being. Therefore, the stereoscopic effect of the drawing formed by the light reflecting portion 6 is emphasized.

  Further, if the linear voids 7B are arranged so as to be symmetric with respect to the symmetry line or the symmetry point of the display main body 2, the light reflecting portion 6 can be viewed from either the left or right or the surroundings. You will be able to see the design with high visibility. At this time, the laser light is divided and incident according to the above-mentioned symmetry line or symmetry point so that the linear void portion 7B to be formed has symmetry.

  Since the position and the overlap of the voids 7 can be freely adjusted, the degree of freedom of the pattern of the light reflecting portion 6 can be increased. In particular, a plurality of voids 7 are arranged along a surface intersecting the light emitting surface 5 to form a plurality of layers of a void group composed of the plurality of voids 7 so that the voids 7 of the adjacent void groups do not overlap each other. Then, when the light reflecting portion 6 is viewed from the direction normal to the surface on which one void group is formed, the density of the voids 7 becomes high, so that the amount of light reflected from the light emitting surface 5 increases, The visibility of the light reflecting portion 6 is increased.

  As a specific example, as shown in FIG. 5, the light reflecting portion 6 includes a void group A including voids A1 to A4 located in the surface SA, a void group B including voids B1 located in the surface SB, and a surface SC. Assuming that it is composed of a void group C made up of voids C1 to C4 located inside and a void group D made up of voids D1 to A4 located in the surface SD, the voids when viewed from the normal direction of the surface SA The voids A1 to A4 of the group A, the voids C1 to C4 of the void group C, and the voids B1 of the void group B and the voids D1 of the void group D overlap, but the voids A1 to A4 of the void group A and the voids B1 of the void group B are overlapped. , And the voids C1 to C4 of the void group C and the void D1 of the void group D do not overlap. That is, this corresponds to a case where the body-centered cubic lattice is formed by the voids A1 to A4, the void B1 of the void group B, and the voids C1 to C4 of the void group C. In this case, when viewed from the normal direction of the surface SA, the void B1 of the void group B is located in the region surrounded by the voids A1 to A4, and the apparent density of the voids 7 becomes large. When light is incident from the normal direction of, the light incident in the area surrounded by the voids A1 to A4 is reflected by the void B1 of the void group B even if it is not reflected by the voids A1 to A4. Therefore, as compared with the case where the voids A1 to A4 and the void B overlap each other when viewed from the normal direction of the surface SA, the amount of light reflected from the light emitting surface 5, in other words, at the light reflecting portion 6. Since the amount of reflected light is large, the visibility of the light reflecting portion 6 can be increased. In addition, in the region where the light reflecting portion 6 is formed, that is, in the region where the void 7 is formed, it is possible to reduce the portion that does not reflect light, so the shape formed by the light reflecting portion 6, that is, the void 7. Can be illuminated evenly. When viewed from the direction normal to the surface SA, the gap between the voids 7 is reduced, so that the stereoscopic effect of the light reflecting portion 6 can be further emphasized.

  The arrangement of the voids 7 in the adjacent void groups is not limited to the state in which the body-centered cubic lattice is formed, and it is sufficient that the voids 7 in the adjacent void groups are formed so as not to overlap each other. There is no limit.

  In addition, since each void is formed to have the void body (7A) and the linear void (7B) continuous to the void body (7A), the stereoscopic effect of the light reflecting portion 6 can be further emphasized.

  In particular, among the adjacent void groups, the linear void portions (7B) formed in the voids of the one void group are the other voids when viewed from the direction parallel to the surface on which the one void group is formed. A state in which the linear voids (7B) formed in the voids of the group are formed so as to intersect with each other, specifically, as seen from a direction parallel to the surface SA as shown in FIGS. 6 and 7. Sometimes (FIG. 7(B)), when the linear void portion AC formed in the voids A1 to A4 and the linear void portion AC formed in the void B1 are formed to intersect with each other, the display is It is possible to increase the probability that the light that has entered the main body 2 is reflected by the linear void portions AC and the linear void portions BC, and it is possible to increase the number of times of reflection.

  In the linear void portion AC and the linear void portion BC, the width of the space SP inside is narrower than that of the voids A1 to A4, and the light is more effectively dispersed. It can be illuminated in multiple colors. Then, the density of the overlapping of the linear voids, in other words, if the number of the overlapping linear voids is increased, the light amount of the light reflected here can be further increased. The visibility of the part can be further increased. Then, even if the intensity of the light of each wavelength dispersed in one linear void is weak, the intensity of the light of each wavelength in the vicinity thereof as a whole can be maintained at a sufficiently visible intensity. The light split by the light reflecting portion 6 can be visually recognized even if no special light is incident on the light.

  In other words, even when natural light is incident on the display main body 2, the light reflected by the linear void portion, that is, the light reflecting portion 6 can be visually recognized. Since the light reflected by the light reflecting section 6 contains light of various wavelengths, the light reflecting section 6 can be made to shine in multiple colors, and an atmosphere like opal can be created.

  The void 7 is formed so that the length W including the linear void portion is 10 to 300 μm, and the distance L1 or the distance L2 between the adjacent voids 7 is 10 to 150 μm. If it is formed, the light reflection state in the voids 7 and the light reflection between the voids 7 can be optimized, so that the visibility of the light reflecting portion 6 can be enhanced and the adjacent voids 7 can be formed. Light can be split into light of various wavelengths while the light is reflected between the linear voids. If the length W of the void 7 including the linear void portion and the distances L1 and L2 between the adjacent voids 7 are optimized, the light reflecting portion 6 can be illuminated more effectively in multiple colors. it can.

  In addition, the voids 7 forming the light reflecting portion 6 do not necessarily have a uniform length W including the linear void portions, and the light reflecting portions 6 are interspersed with the voids 7 having a length within the above range. become. Then, when the length W of the voids 7 changes, for example, if the small voids 7 are scattered between the large voids 7, the regions where the voids 7 do not exist can be further reduced between the voids 7. Therefore, the light reflecting portion 6 can be illuminated more uniformly.

  On the contrary, in the light reflecting portion 6, when it is desired to form a bright portion and a darker portion when viewed from a certain direction, the bright portion is a surface having a normal line parallel to the viewing direction. In the adjacent void group included in, the voids 7 are arranged so that the voids 7 included in the adjacent void group do not overlap with each other, and in the portion to be darkened, the voids 7 included in the adjacent void group are overlapped with each other. do it.

  The light reflecting portion 6 may be formed by a plurality of recessed holes that are recessed inward from the light emitting surface 5. In this case, if the depth of the recessed hole is changed, the position where the recessed hole shines in the display main body 2 becomes three-dimensional, and a stereoscopic effect can be generated in the drawing formed by the light reflecting portion 6. Moreover, since it is a recessed hole and does not penetrate the display main body 2, the light BM reflected by the light reflecting portion 6 is further reflected by the light emitting surface 5 on the side opposite to the side viewed by a person, and the light emitting on the opposite side is emitted. This can be given to a person who sees the impression that the shadow of the light reflecting portion 6 is formed on the surface 5. Therefore, the stereoscopic effect of the drawing formed by the light reflecting portion 6 is emphasized.

  8 and 9 are explanatory diagrams showing another embodiment in which the directionality of the void 7 is specified. In the display device 1 according to this embodiment, the light incident from the light incident part 3 is indicated by a broken line from a single or a plurality (three light incident parts 3 in the example shown in the figure) of light emission points G. The linear void portion 7B of the void 7 is formed along the incident direction of the light incident from the light incident portion 3 toward the light reflecting portion 6 at a predetermined radiation angle θ (in the figure, Indicates the size of the void 7 in an enlarged scale). Here, the light emitting points 10A, 10B, and 10C having different emission colors are used to form the light emitting point G on the end surface of the light entrance portion 3. However, the present invention is not limited to this, and as shown in FIG. The light entrance part 3 may be provided with a single recess or a plurality of recesses that are recessed inward, and the light emitting point G may be disposed inside the recess.

  When the directionality of the air gap 7 is adjusted to the incident direction of the light entering from the light incident part 3 in this way, the ratio of light diffusion while propagating in the air gap 7 as shown in FIG. Diffuse reflection can be performed in the reflecting section 6, and the cross-sectional area of the void 7 that blocks the progress of light can be reduced by arranging the linear void 7B in the direction of the incident light. It becomes possible, and the void 7 inside can be made to shine by each light emitting body 10A (10B, 10C).

  Further, by making the directionality of the linear voids 7B symmetrical in accordance with the symmetry of the patterns of the optical display main body 2 and the light reflecting portion 6, good visibility can be obtained regardless of the viewing position.

  In other words, the individual voids 7 can effectively reflect the light from the light emitters 10A, 10B, 10C having the same directionality. By utilizing this, a partial reflection region that reflects the light emitted from the light emitting point G of the specific light emitting body 10A (10B, 10C) can be formed in the light reflecting portion 6. At this time, in this partial reflection region, the linear void portion 7B is formed along the extension direction of the straight line connecting the light emitting point G of the specific light emitting body 10A (10B, 10C) and the void 7. .. According to this, for example, by changing the colors of the light-emitting bodies 10, 10B, and 10C so that light of different colors is emitted for each light emission point G, the partial reflection regions of the light reflection portion 6 are effectively different. You will be able to make them glow in color.

  Explaining with reference to FIG. 8, here, the light emitters 10A, 10B, and 10C are symmetrically arranged with respect to the axis of symmetry O, in which, for example, the partial reflection region by the pair of light emitters 10A is point abcd. Although it is an enclosed region, a linear void portion 7B is formed in the region along the extension direction of the straight line connecting the light emitting point G of the light emitting body 10A and the void 7.

  Here, in FIG. 8, for example, the area surrounded by the point afge is an area to which the light from the two light emitting points G of the light emitting body 10A and the light emitting body 10B are both irradiated. In the partial reflection region into which the light emitted from the plurality of light emission points G is incident, each of the plurality of light emission points G is associated with the void 7 in the partial reflection region, and each light emission point G and the corresponding voids. The linear void portion 7B of the void 7 is formed along the extension direction of the straight line connecting with 7. According to this, it becomes possible to effectively reflect the light from the plurality of light emission points G in the partial reflection region and make it shine. Therefore, if the lights from the plurality of light emitting points G are made into lights of different colors, it is possible to obtain reflected lights of mixed colors of these colors from the partial reflection areas.

  FIG. 9 is a modified example of FIG. 8 and is an example in which the light emitting points G of the light emitting bodies 10A, 10B, and 10C are provided so as to face the light emitting surface 5 of the display body 2. According to this, the light reflecting portion 6 can be made to uniformly shine in the thickness direction of the display body 2. At this time, the light emitting point G is set at a position separated from the light emitting surface 5.

  As in the embodiment shown in FIGS. 8 and 9, in order to form the linear void portion 7B along the incident direction of the light incident from the incident portion 3, the light emitting position of the laser light forming the void 7 is set. A spot of laser light is formed at a predetermined formation position of the light reflecting portion 6 while changing the irradiation angle of the laser light within the range of the emitted light θ according to the set light emission point G. As a result, the void body 7A is formed at the spot position of the laser light, and the linear void 7B is formed along the irradiation angle of the laser light.

  It should be noted that in each of the above-described embodiments, the state of the light entering the display body 2 can be freely adjusted by changing the light entrance adjustment process on the flat surface of the light entrance part 3 or the inner surface of the recess 4. it can. The light incident adjustment process is, for example, a light transmission process for reducing the surface roughness of the inner surface of the recess 4 to prevent irregular reflection on the inner surface of the recess 4, or conversely, a diffusion state in which the inner surface of the recess 4 has large irregular reflection on the inner surface. Specifically, for glass, a diffusing process for making a satin-like state, that is, a state like frosted glass, a process for adjusting the width of a light flux of light incident from the light-emitting body 10, and the like.

  In the case of the light transmission treatment, the inner surface of the recess 4 is polished, or a material having a refractive index similar to that of the display body 2 is attached or coated on the inner surface of the recess 4 to reduce the surface roughness. If the center line average roughness is 0.100 μm or less, that is, if it is processed into a mirror surface or a state close to it, diffuse reflection of light can be surely suppressed, so that the incidence efficiency can be further increased and the device structure can be made compact. It is possible to save energy. When the thickness is about 0.025 to 0.080 μm, the incidence efficiency can be kept higher without extremely increasing the processing accuracy. In particular, it is preferable to set the surface roughness of the inner surface of the concave portion 4 to about 0.035 to 0.08 μm, because the processing becomes easy and the visible light can be efficiently incident. When a lens is provided on the emission surface of the light-emitting body 10 installed in the recess, the surface roughness of the inner surface of the recess 4 is made smaller than the surface roughness of the lens surface to reduce the incident light rate of light. Can be increased.

  On the contrary, if the diffusion process is performed, the light incident from the light-emitting body 10 is diffusely reflected on the inner surface of the concave portion 4 so that the incident efficiency of the light is reduced, but the incident light can be spread over almost the entire area of the display main body 2. be able to. Then, when light of different colors is made incident on the display main body 2 from the light emitters 10 provided in the respective recesses 4, it is possible to make the light reflecting portion 6 shine in a complicated color in which all the lights are overlapped.

  In addition, for example, a process of adjusting the width of the luminous flux of the light incident from the light emitters 10, specifically, when a plurality of lenses are attached to the surface of the light entrance unit 3 or the like, the light incident from each light emitter 10 can be obtained. Since it is possible to freely adjust the diffused light collection, it is possible to easily and surely adjust the shining state of the light reflecting portion 6 to a desired state. If a lens capable of condensing light is used as the plurality of lenses, the intensity of the light emitted to the light reflecting portion 6 can be increased, so that the light can be emitted without using the strong light emitting body 10. The light emission intensity of the reflector 6 can be increased. Therefore, the structure of the device can be made compact and energy can be saved.

  Further, as the light emitting body 10 arranged in the light emitting portion G, any light emitting body can be used as long as the light can be incident on the display body 2, but a light emitting diode, an organic EL, or the like can be used. If it is used, it can generate strong light even with a small size and a small amount of power, and since it has a long life, it does not need to be replaced frequently, which facilitates maintenance, which is preferable.

  Furthermore, instead of the light-emitting body 10, the other end of the optical fiber whose one end is connected to the light source is arranged in the light emitting part G, and the light emitted from the light source is transmitted to the light entering part 3 of the display body 2 by the optical fiber. The structure may be such that In this case, since the light source can be installed at a position away from the display main body 2, it is possible to reduce restrictions such as the size of the light source and increase the degree of freedom of the light source used. Further, since it is only necessary to provide the display main body 2 with an optical fiber, the installation space of the display main body 2 can be reduced, and the degree of freedom of the installation place and the shape of the display main body 2 can be increased. Furthermore, if the light from one light source is dispersed and supplied to a plurality of optical fibers, it is possible to use one light source for a plurality of display devices 1. Then, since it is not necessary to provide a light source for each display device 1, the device can be made compact and the equipment cost can be suppressed.

  Furthermore, if a prism is installed in the light incident part 3 and light is made incident on the light incident part 3 through this prism, white light can be split into light of a plurality of wavelengths. Then, even if an ordinary fluorescent lamp or the like is used as a light source, light having a plurality of wavelengths can be made incident on the light reflecting portion 6, and therefore, even if the light source used for the conventional display is used as it is, the drawing is performed. Can be illuminated in a plurality of colors, the structure of the device can be simplified, and the device can be manufactured at a reasonable price.

  Further, in the light entrance part 3, if a plurality of concave portions 4 are formed in the direction along the light emitting surface 5 of the display body 2 and each concave portion 4 is provided with a light emitting body 10 which emits light of a different color, light reflection is achieved. The part 6 can be illuminated in various colors and the light reflecting part 6 can be displayed more beautifully. In this case, if a plurality of light emitters 10 are integrated as a light emitting unit, the light emitter 10 can be inspected. And easy to replace.

  For example, a support unit capable of supporting a plurality of light emitting bodies 10 is detachably attached to the light incident portion 3, and a mounting portion that penetrates between the recess 4 of the light incident portion 3 and the outside is formed in this support unit. If a spacer made of a stretchable material such as urethane rubber having a hole having an inner diameter smaller than the outer diameter of the light emitting body 10 is attached to this mounting portion, the light emitting body 10 is simply inserted into the hole of the spacer. The light emitting body 10 is securely supported by, and when the light emitting body 10 is replaced, it can be easily removed by pulling the light emitting body 10. Therefore, inspection and replacement of the light emitter 10 are facilitated. Moreover, since all the light emitting bodies 10 can be replaced at once by removing the support unit, even if the color of the display main body 2 is changed every season, the change operation becomes easy. In the case of a show window or the like, it is preferable that the support unit itself is formed of a stretchable material such as urethane rubber because the support unit can maintain the airtightness between the outside and the inside.

  If the plurality of recesses 4 are provided side by side not only in the direction along the light emitting surface 5 but also in the thickness direction of the display main body 2 and the light emitters 10 are disposed in the respective recesses 4, the light reflecting portion 6 is formed. It is also possible to display it as a drawing having layers of a plurality of colors.

  Furthermore, the timing and intensity of light emission of each light emitter 10 and the light emission time may be changed. For example, if all the light emitting bodies 10 are blinked at the same time, the light reflecting portion 6 can be blinked like a strobe, and if each light emitting body 10 is blinked in order, the light reflecting portion 6 is formed. You can give the impression that the drawing is moving.

  Further, since the light emitting body 10 is arranged in the concave portion 4 of the light incident portion 3, it is possible to increase the area where light is incident. Therefore, the efficiency of incidence of the light emitted from the light emitting body 10 on the display body 2 can be increased, so that the light reflecting portion 6 can be sufficiently illuminated even if the light emitting intensity of the light emitting body 10 is weak. Further, since the incidence efficiency is high, it is not necessary to upsize the light emitting body 10 or use a high power light source, the structure of the device can be made compact, and energy can be saved.

  Moreover, since the inner surface of the concave portion 4 functions as a lens, the area for diffusing the light BM incident from each light-emitting body 10 can be adjusted by adjusting the radius of curvature of the inner surface of the concave portion 4. The shining state of 6 can be easily and surely adjusted to a desired state.

Claims (21)

  A device comprising a display body having a light emitting surface formed of a material having a light transmitting property, and a light reflecting portion formed inside the display body and configured to reflect light incident on the display body. The light reflection portion is formed by a plurality of voids formed three-dimensionally inside the display body, and each void has a void body portion and a linear void portion extending in one direction from the void body portion. A display device characterized by the above.   The display device according to claim 1, wherein a thin film having a spectral function is formed on an inner surface of the void body.   The display device according to claim 1, wherein the size of the plurality of voids is 10 to 300 μm, and the distance between adjacent voids is 10 to 150 μm.   The display device according to claim 1, wherein the plurality of voids are arranged such that a shape formed by the plurality of voids is uniformly illuminated.   A void group in which a plurality of voids are arranged is formed along a surface intersecting the light emitting surface, the void group is formed in a plurality of layers, and one void group is formed in the adjacent void groups. Seen from the normal direction of the surface, the voids forming the other void group are formed so as to be arranged in the region surrounded by the adjacent voids forming one void group. The display device according to claim 1, wherein the display device is a display device.   Of the adjacent void groups, the linear void portions formed in the voids of one void group are the voids of the other void group when viewed from a direction parallel to the surface on which the one void group is formed. The display device according to claim 5, wherein the display device is formed so as to intersect with the linear void portion formed in.   7. The display body includes a light entrance portion formed so that a normal line thereof intersects a normal line of the light emitting surface, and light is incident from the light entrance portion. The display device according to any one of 1.   The display device according to claim 7, wherein the light incident from the light incident portion is incident from a single or a plurality of light emission points toward the light reflecting portion at a predetermined emission angle.   The display device of claim 8, wherein the linear void portion is formed along an incident direction of light incident from the light incident portion.   The light reflection portion has a partial reflection region that reflects light emitted from the specific light emission point, and in the partial reflection region, along the extension direction of a straight line connecting the specific light emission point and the void. The display device according to claim 8, wherein the linear void portion of the void is formed.   The display device according to claim 8, wherein light of a specific color is emitted for each of the specific light emission points.   Light emitted from a plurality of light emission points is incident on one of the partial reflection areas, and a void in the partial reflection area is associated with each of the plurality of light emission points, and the light emission points and the corresponding light emission points The display device according to any one of claims 8 to 11, wherein a linear void portion of the void is formed along an extension direction of a straight line connecting the void.   The display device according to any one of claims 8 to 12, wherein the light incident part has a recessed portion which is recessed inward, and the light emitting point is arranged inside the recessed portion.   14. The display device according to claim 13, wherein the light entering portion is provided with a plurality of the concave portions.   The display device according to claim 7, wherein a surface roughness of the light incident portion is 0.100 μm or less.   15. The display device according to claim 7, wherein the light entering unit includes a plurality of lenses, and light is incident on the inside of the display main body through the lenses.   The display device according to claim 7, wherein a surface of the light entrance portion is formed in a diffused state.   The display device according to any one of claims 7 to 14, wherein a prism is arranged in the light incident part, and a light source for supplying light to the prism is arranged.   The display device according to claim 8, wherein a light emitting diode is arranged at the light emitting point.   The display device according to any one of claims 8 to 13, wherein the other end of an optical fiber, one end of which is connected to a light source, is arranged at the light emitting point.   21. The display device according to claim 1, wherein the light emitting surface is formed in a diffused state.

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