JP2017211428A - Display and method of controlling display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display in which a structure can be provided adjacent to end faces of a display medium.SOLUTION: A display film 112 of a fluorescent display 100 comprises a first display surface 112a that, when excited by first excitation light EL11 and second excitation light EL12, holds phosphor fine particles 111 emitting first fluorescent light RL1 having a shorter wavelength than that of the excitation light in a dispersed state, and displays the first fluorescent light. A first prism 124 of the fluorescent display is in contact with the first display surface, introduces the first excitation light from the first display surface of the display film to the display film, and propagates the excitation light along the first display surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device and a display device control method.

  2. Description of the Related Art Conventionally, there has been provided a display device that includes a display medium in which a phosphor that emits fluorescence having a wavelength shorter than that of excitation light when dispersed by excitation light having two types of wavelengths is dispersed and displayed, and displays predetermined information using fluorescence. Yes (see Patent Document 1).

  In the display device disclosed in Patent Document 1, excitation light (infrared light) is emitted from two types of laser light sources (infrared light sources) toward the inside of the display medium (display unit), and the excitation light is emitted. Predetermined information is displayed by generating fluorescence from the light emitters (phosphor particles) present at the intersections.

JP 2006-249254 A

  By the way, the display device described in Patent Document 1 discloses a configuration in which excitation light emitted from a laser light source is introduced into the inside from an end face of the display medium to propagate the display medium (see, for example, FIG. 6). . In such a display device, development of a technique for providing a structure adjacent to an end face of the display medium while avoiding interference with excitation light introduced into the display medium is required.

  The present invention has been made to meet the above-described demand, and provides a display device and a display device control method in which a structure can be provided adjacent to an end face of a display medium.

  In order to achieve the above object, a display device of the present invention includes a display medium, a first light source, a first introduction member, a second light source, a second introduction member, and a control member. . When the display medium is excited by a plurality of excitation lights including the first excitation light and the second excitation light, the display medium disperses and holds a light emitting body that emits fluorescence having a shorter wavelength than the plurality of excitation lights, A display surface for displaying the fluorescence was provided. The first light source emits the first excitation light. The first introduction member introduces the first excitation light into the display medium. The second light source emits the second excitation light. The second introduction member introduces the second excitation light into the display medium so as to intersect with the first excitation light. The control member controls the first light source and the second light source so as to intersect the first excitation light and the second excitation light at a specific position of the display medium. Here, at least the first introduction member abuts on the display surface, introduces the first excitation light from the display surface to the display medium, and propagates along the display surface.

  In order to achieve the above object, the display device control method of the present invention is shorter in wavelength than the plurality of excitation lights when excited by a plurality of excitation lights including the first excitation light and the second excitation light. Propagating the first excitation light and the second excitation light so as to cross each other at a specific position with respect to a display medium that disperses and holds the phosphors that emit fluorescence and displays the fluorescence. Control is performed so that information is displayed on the display surface of the display medium by generating fluorescence. Here, at least the first excitation light is introduced from the display surface to the display medium via the introduction member in contact with the display surface and propagates along the display surface to display the information. Control.

  According to the display device and the display device control method, the structure can be provided adjacent to the end face of the display medium.

It is a figure which shows typically an example of the usage method of the fluorescent light emission display of 1st Embodiment. It is a perspective view which shows typically the structure of the fluorescence light-emitting display of FIG. It is a perspective view which shows the principal part of the fluorescent light-emitting display of FIG. 3B is a side view showing the fluorescent light emitting display of FIG. 3A. FIG. It is a front view which shows typically the display method of the fluorescence light-emitting display of FIG. It is a side view which shows typically the principal part of the fluorescence light-emitting display which concerns on the modification 1 of 1st Embodiment. It is a perspective view which shows typically the principal part of the fluorescence light-emitting display which concerns on the modification 2 of 1st Embodiment. It is a perspective view which shows typically the principal part of the fluorescence light-emitting display which concerns on the modification 3 of 1st Embodiment. It is a side view which shows the principal part of the fluorescence light-emitting display of 2nd Embodiment. It is a side view which shows the principal part of the fluorescence light emission display of the modification of 2nd Embodiment. It is a side view which shows the principal part of the fluorescence light-emitting display of 3rd Embodiment. It is a side view which shows the principal part of the fluorescence light-emitting display of 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same members are denoted by the same reference numerals, and redundant description is omitted. In the drawings, the size and ratio of each member are exaggerated to facilitate understanding of the embodiment, and may be different from the actual size and ratio.

  In the figure, arrows represented by X, Y, and Z indicate directions. An arrow represented by X indicates the propagation direction of the first excitation light EL11 or the like in the display film 112 or the like. The arrow represented by Y is orthogonal to the direction represented by X, and indicates the propagation direction of the second excitation light EL12 and the like in the display film 112 and the like. The arrow represented by Z indicates the thickness direction of the display film 112 or the like.

(First embodiment)
FIG. 1 is a diagram schematically illustrating an example of a method of using the fluorescent light emitting display 100 according to the first embodiment.

  Referring to FIG. 1, a fluorescent light emitting display 100 is used by being attached to the indoor side of a windshield 11 of a vehicle 10 as an example. The fluorescent light emitting display 100 can display, for example, information on the speed of the vehicle 10 by characters (G1 in FIG. 1). The fluorescent display 100 can display information on the route from the current location of the vehicle 10 to the destination on a map (G2 in FIG. 1). The fluorescent light emitting display 100 can display information such as a pedestrian existing in the traveling direction of the vehicle 10 in a human figure (G3 in FIG. 1).

  FIG. 2 is a perspective view schematically showing a configuration of the fluorescent light emitting display 100 of FIG. FIG. 3A is a perspective view showing a main part of the fluorescent light emitting display 100 of FIG. FIG. 3B is a side view showing the fluorescent display 100 of FIG. 3A. In FIG. 3, illustration of the phosphor fine particles 111 is omitted.

  Referring to FIG. 2 and FIG. 3, the fluorescent light emitting display 100 (corresponding to a display device) according to the first embodiment is briefly described as a display film 112 (corresponding to a display medium) and a first light source 121. A first prism 124 (corresponding to the first introducing member), a second light source 131, a second prism 134 (corresponding to the second introducing member), and a control unit 140 (corresponding to the controlling member). Corresponding).

  Specifically, the display film 112 includes a plurality of first excitation light EL11 (infrared light having a wavelength of 1550 nm) and second excitation light EL12 (infrared light having a wavelength of 850 nm). When excited by excitation light, the phosphor fine particles 111 (corresponding to the first light emitter) emitting the first fluorescence RL1 (green which is visible light) having a wavelength shorter than that of the plurality of excitation lights are dispersed and held. And a display surface (first display surface 112a) for displaying the first fluorescence RL1. The first light source 121 emits the first excitation light EL11. The first prism 124 introduces the first excitation light EL11 into the display film 112. The second light source 131 emits second excitation light EL12. The second prism 134 introduces the second excitation light EL12 into the display film 112 so as to intersect with the first excitation light EL11. The control unit 140 controls the first light source 121 and the second light source 131 so that the first excitation light EL11 and the second excitation light EL12 intersect at a specific position of the display film 112. Here, at least the first prism 124 comes into contact with the first display surface 112a, introduces the first excitation light EL11 from the first display surface 112a to the display film 112, and propagates along the first display surface 112a.

  As shown in FIG. 2, the fluorescent light emitting display 100 has the display film 112 attached to the windshield 11 of the vehicle 10 and the end face (the first end face 112 c and the second end face 112 d) of the display film 112 and the windshield 11. The joining member 20 is molded on the end faces (the first end face 11c and the second end face 11d). The joining member 20 is an adhesive that joins the end surface of the windshield 11 and a vehicle casing (not shown).

  In the case of a configuration in which the bonding member 20 (corresponding to a structure) is filled between the windshield 11 and the vehicle casing and cured by bonding, a display film 112 is attached to the windshield 11. It is difficult to introduce excitation light from the end face (for example, the first end face 112c) of the display film 112 because the joining member 20 interferes.

  Hereinafter, the fluorescent light emitting display 100 according to the first embodiment will be described in detail.

  As shown in FIG. 2, the fluorescent light-emitting display 100 supplies information to the display unit 110 that displays information using the green first fluorescence RL1 that is visible light, and supplies the first excitation light EL11 that is infrared light to the display unit 110. The first light source unit 120, the second light source unit 130 that supplies the second excitation light EL 12 of infrared light to the display unit 110, and the control unit 140 that controls the first light source unit 120 and the second light source unit 130. ing.

  In FIG. 2, the display film 112 is exaggerated in the Z direction with respect to the X direction and the Y direction. That is, although the display film 112 is originally formed in a sheet shape, the display film 112 is shown exaggerated with respect to the windshield 11. In FIG. 2, the display film 112 is illustrated as a square shape as an example. However, when the display film 112 is used by being attached to the entire surface of the windshield 11 of the vehicle 10 as illustrated in FIG. You may make it.

  Referring to FIG. 2, display unit 110 includes a display film 112 that holds phosphor fine particles 111 uniformly and densely dispersed.

  Table 1 shows the optical characteristics of the phosphor fine particles 111.

  The phosphor fine particles 111 are fine particles that emit green first fluorescence RL1 that is visible light when excited by the first excitation light EL11 and the second excitation light EL12 that are infrared light, respectively. The phosphor fine particles 111 do not emit fluorescence only by the first excitation light EL11 or the second excitation light EL12.

The phosphor fine particles 111 are configured by doping erbium (Er) as a light emitting material with respect to sodium yttrium fluoride (NaYF ₄ ) as a base material halide, for example. When the phosphor fine particles 111 are excited by the first excitation light EL11 and the second excitation light EL12, the first fluorescence corresponding to the light of the green wavelength is accompanied by the transition from the energy level of the Er ³⁺ ion. Issue RL1.

  The size of the phosphor fine particles 111 is sufficiently smaller than the spot diameters of the first excitation light EL11 and the second excitation light EL12 propagating through the display film 112. The wavelength of the first fluorescence RL1 emitted from the phosphor fine particles 111 depends on the type of the light emitting material doped into the base material.

  The display film 112 includes a first display surface 112a and a second display surface 112b that face each other. The first display surface 112a or the second display surface 112b displays various information (G1, G2, and G3 in FIG. 1) by the first fluorescence RL1. The display film 112 has a first end surface 112c that is sufficiently smaller than the first display surface 112a and is formed in a film shape.

  The display film 112 causes the first excitation light EL11 to enter from the first display surface 112a through the first prism 124. The display film 112 causes the second excitation light EL12 to enter the inside from the first display surface 112a through the second prism 134. The first excitation light EL11 and the second excitation light EL12 propagate along the first display surface 112a while being alternately reflected between the first display surface 112a and the second display surface 112b of the display film 112. .

  The display film 112 is made of a transparent material in the entire visible light range (purple to red). Therefore, in a state where the display film 112 is attached to the windshield 11 of the vehicle 10, an occupant of the vehicle 10 can visually recognize the front of the vehicle 10 through the display film 112.

  The first fluorescence RL1 emitted from the phosphor fine particles 111 in the display film 112 is green which is visible light. Here, the peak of human visibility is about 555 nm in a bright place and about 507 nm in a dark place. Since the first fluorescence RL1 is green light corresponding to a wavelength of 500 nm to 560 nm, it is very easy for the passenger to visually recognize the first fluorescence RL1. On the other hand, since the 1st excitation light EL11 and 2nd excitation light EL12 which propagate the display film 112 are infrared light, a passenger | crew does not visually recognize.

  Referring to FIGS. 2 and 3, the first light source unit 120 includes a first light source 121 that emits the first excitation light EL <b> 11, and a plurality of the first excitation light EL <b> 11 that propagates toward the first collimator lens 123. The first optical fiber 122 includes a plurality of first collimator lenses 123 that propagate the first excitation light EL11 incident from the corresponding first optical fibers 122 to the first prism 124 while collimating the first excitation light EL11. Yes. In addition, the first light source unit 120 is in contact with the first display surface 112a, the first prism 124 that introduces the first excitation light EL11 into the display film 112, and the electric wire that relays the first light source 121 and the control unit 140. 125 is included.

  For example, the first light source 121 is configured by unitizing a laser diode that emits light corresponding to the wavelength of the first excitation light EL11 and a condensing lens that condenses the first excitation light EL11. Specifically, the first light source 121 is constituted by an infrared light source of a CAN (metal tube with a window) package in which a laser diode having an oscillation wavelength of 1550 nm is mounted and a window plate is a condenser lens. ing.

  For example, an infrared laser diode for optical communication is used as the laser diode of the first light source 121. Infrared lasers for optical communication are generally reliable for light oscillation, robust and inexpensive. The condensing lens, which is a window plate of the CAN package, condenses the first excitation light EL 11 emitted from the light source and makes it incident on the first optical fiber 122.

  The first optical fiber 122 propagates the first excitation light EL11 toward the first collimator lens 123. As the first optical fiber 122, for example, a single mode optical fiber (SMF) for optical communication corresponding to a wavelength of 1550 nm is used. Optical fibers for optical communication are generally reliable in light propagation, robust and inexpensive. The first optical fiber 122 has a numerical aperture (NA) representing a maximum light receiving angle of incident light, for example, 0.1 or less.

  The first collimator lens 123 propagates the first excitation light EL11 incident from the corresponding first optical fiber 122 to the first prism 124 while collimating it. The plurality of first collimator lenses 123 are arranged in a line along the incident surface 124 a of the first prism 124.

  The first collimator lens 123 is composed of an aspheric lens or a spherical lens. The first collimator lens 123 depends on the divergence angle and wavelength of the first excitation light EL11 emitted from the first optical fiber 122, the spot diameter of the first excitation light EL11 propagated to the first prism 124, and the like. Determine its specifications. The specifications of the first collimator lens 123 relate to the material, the curvature of the entrance surface and the exit surface, and the working distance between the entrance surface of the first collimator lens 123 and the first optical fiber 122.

  The first collimator lens 123 may be constituted by a single array lens in which a plurality of collimator lenses are integrally formed. If one array lens is used, it is not necessary to arrange a plurality of collimator lenses with high accuracy, and it is easy to form each collimator lens in a dense manner.

  The first collimator lens 123 may be configured with a dead index (GI). The GI lens is a lens having a cylindrical shape along the light propagation direction, and the refractive index continuously changing along the radial direction. The GI lens emits incident diverging light while collimating it. The GI lens can be configured integrally with the first optical fiber 122 by being bonded to the emission portion of the first optical fiber 122.

  As shown in FIG. 2 and FIG. 3, the first prism 124 introduces the first excitation light EL11 from the first display surface 112a to the display film 112, and the first excitation light EL11 is introduced into the first display surface 112a. Along the X direction. The first prism 124 has a triangular side surface as shown in FIG. 3B, and is formed by a rectangular parallelepiped extending along the Y direction as shown in FIGS. 2 and 3A.

  The first prism 124 includes a planar incident surface 124a inclined in the X direction so as to intersect the first display surface 112a, and a planar emission surface 124b that is in close contact with the first display surface 112a of the display film 112. ing. The first prism 124 is made of the same material as the display film 112. The first prism 124 is bonded to the first display surface 112a so as to be along the upper edge of the first end surface 112c of the display film 112. As shown in FIG. 3B, the first prism 124 is in contact with the first display surface 112a of the portion B1 that is separated from the optical path K1 of the first excitation light EL11 that reflects and propagates inside the display film 112. .

  The first prism 124 is made of the same material as the display film 112. Even when the first prism 124 is made of a material different from that of the display film 112, the first prism 124 has a refractive index similar to that of the display film 112 at least in the wavelengths of the first excitation light EL11 and the second excitation light EL12. Consists of materials.

  As shown in FIG. 3B, the first prism 124 causes the first excitation light EL11 propagating along the X direction to be incident from the incident surface 124a, and the first excitation light EL11 is made downward in the Z direction and X While propagating in the direction, the light is introduced (obliquely incident) from the emission surface 124b to the first display surface 112a of the display film 112. The first excitation light EL11 propagates in the X direction along the first display surface 112a while being alternately reflected between the first display surface 112a and the second display surface 112b of the display film 112.

  The electric wire 125 supplies electric power to the first light source 121 via the control unit 140. As the electric wire 125, one that satisfies the specifications of the driving current and driving voltage of the first light source 121 is selected and used.

  Referring to FIG. 2, the second light source unit 130 intersects the first excitation light EL11 with the second light source 131 that emits light corresponding to the wavelength of the second excitation light EL12, and the second excitation light EL12. The second prism 134 while collimating the plurality of second optical fibers 132 propagating toward the second collimator lens 133 and the second excitation light EL12 incident from the corresponding second optical fibers 132. A plurality of second collimator lenses 133 propagating in the direction. The second light source unit 130 is in contact with the first display surface 112a, the second prism 134 that introduces the second excitation light EL12 into the display film 112, and the electric wire that relays the second light source 131 and the control unit 140. 135 is included.

  The second light source 131 has the same configuration as that of the first light source 121, except that an infrared laser diode for optical communication having an oscillation wavelength corresponding to the second excitation light EL12 is 850 nm.

  The second optical fiber 132 has the same configuration as that of the first optical fiber 122 except that an SMF for optical communication corresponding to light having a wavelength of 850 nm corresponding to the second excitation light EL12 is used. Become.

  The second collimator lens 133 has the same configuration as that of the first collimator lens 123 except that it corresponds to light having a wavelength of 850 nm corresponding to the second excitation light EL12. The plurality of second collimator lenses 133 are arranged in a line along the incident surface 134 a of the second prism 134.

  As shown in FIG. 2, the second prism 134 introduces the second excitation light EL12 from the first display surface 112a to the display film 112 so as to intersect the first excitation light EL11, and the second prism 134 The excitation light EL12 is propagated in the Y direction along the first display surface 112a. The second prism 134 has the same configuration as that of the first prism 124 except that the angle of the incident surface 134a corresponds to light having a wavelength of 850 nm corresponding to the second excitation light EL12.

  The second prism 134 is bonded to the first display surface 112a so as to be along the upper edge of the second end surface 112d of the display film 112. Similar to the first prism 124, the second prism 134 causes the second excitation light EL12 to enter from the incident surface 134a inclined in the Y direction with respect to the first display surface 112a, and the second excitation light. The EL 12 is introduced from the emission surface 134b to the first display surface 112a of the display film 112. The second prism 134 is made of the same material as the display film 112.

  The electric wire 135 supplies electric power to the second light source 131 via the control unit 140. The electric wire 135 has the same configuration as the electric wire 125.

  With reference to FIG. 2, the control unit 140 controls the first light source 121 and the second light source 131.

  The control unit 140 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU executes a control program related to the fluorescent light emitting display 100. The ROM stores a program. The program controls the light emission timing of the first light source 121 and the second light source 131 based on, for example, information related to display received from an external device. The external device is, for example, a control device that controls the vehicle 10, a wireless device provided in the car navigation system of the vehicle 10, and a camera device that is mounted on the vehicle 10 and recognizes a pedestrian or the like. The RAM temporarily stores the results of calculations executed by the CPU.

  FIG. 4 is a front view schematically showing a display method of the fluorescent light emitting display 100 of FIG.

  Referring to FIG. 4, the fluorescent light emitting display 100 is propagated by the first excitation light EL11 propagated by the first collimator lens 123 and the second collimator lens 133 at a specific position of the display film 112. The second excitation light EL12 is crossed. The phosphor fine particles 111 present at the intersection of the first excitation light EL11 and the second excitation light EL12 emit the first fluorescence RL1 and display predetermined information. The phosphor fine particles 111 do not emit light when irradiated only with the first excitation light EL11 or the second excitation light EL12, but emit light when irradiated with both the first excitation light EL11 and the second excitation light EL12.

  In FIG. 4, as an example, one pixel of the display film 112 is displayed by the first fluorescence RL1. Actually, the control unit 140 performs various operations via the first collimator lens 123 arranged in a row and the second collimator lens 133 arranged in a row so as to intersect the first collimator lens 123. Information (G1, G2 and G3 in FIG. 1) is displayed. That is, the control unit 140 displays information including characters, figures, and the like by causing predetermined display pixels to simultaneously emit light among the display pixels present in a grid pattern on the display film 112.

  The operational effects of the first embodiment described above will be described.

  In the fluorescent light emitting display 100, the first prism 124 comes into contact with the first display surface 112a, and the first excitation light EL11 is introduced from the first display surface 112a of the display film 112 to the display film 112 to the first display surface 112a. Propagate along. Further, in the fluorescent light emitting display 100, the second prism 134 is brought into contact with the first display surface 112a, and the second excitation light EL12 is introduced from the first display surface 112a of the display film 112 to the display film 112, so that the first display surface 112 is displayed. Propagate along 112a.

  In the control method of the fluorescent light emitting display 100, the first excitation light EL11 is introduced from the first display surface 112a to the display film 112 via the first prism 124 in contact with the first display surface 112a, and the first display surface 112a. It is controlled to display information by propagating along. Furthermore, in the control method of the fluorescent light emitting display 100, the second excitation light EL12 is introduced from the first display surface 112a to the display film 112 via the second prism 134 in contact with the first display surface 112a, and the first display is performed. Control is performed so that information is displayed along the surface 112a.

  According to the fluorescent light emitting display 100 and the control method of the fluorescent light emitting display 100, the excitation light (the first excitation light EL11 and the second excitation light) is transmitted via the prism (the first prism 124 and the second prism 134). By introducing EL12) from the first display surface 112a to the display film 112, the joining member 20 can be provided adjacent to the end surfaces (the first end surface 112c and the second end surface 112d) of the display film 112.

  Here, conventional fluorescent light emitting devices have made excitation light directly incident on the display film and propagate the excitation light into the display film. On the other hand, the fluorescent light emitting display 100 according to the first embodiment introduces excitation light from the first display surface 112a to the display film 112 via the prisms (the first prism 124 and the second prism 134) and transmits the excitation light. The inside of the display film 112 can be propagated along the first display surface 112a. Specifically, the fluorescent light emitting display 100 includes a prism in contact with the first display surface 112a, so that excitation light propagates along the first display surface 112a through the display film 112 over a sufficient distance. As possible, the optical axis of the excitation light can be sufficiently inclined with respect to the first display surface 112a. That is, even if the incident angle is such that the excitation light is totally reflected at the interface (first display surface 112a) of the display film 112 and cannot be propagated into the display film 112 if there is no prism. Through the prism in contact with the display surface 112a, the first display surface 112a can be transmitted and propagated through the display film 112.

  In particular, the fluorescent light emitting display 100 introduces excitation light into the display film 112 from the first display surface 112a via a prism, and the excitation light is alternated between the first display surface 112a and the second display surface 112b. The inside of the display film 112 can be propagated along the first display surface 112a while being reflected. With such a configuration, the excitation light can be sufficiently propagated from one end of the display film 112 to the other end. Originally, excitation light that propagates while being alternately reflected between the first display surface 112a and the second display surface 112b of the display film 112 may be introduced into the inside from the first display surface 112a of the display film 112. It is totally reflected at the interface (first display surface 112a) and cannot be propagated into the display film 112. However, the fluorescent light emitting display 100 transmits the excitation light from the first display surface 112a through the prism in contact with the first display surface 112a and introduces the excitation light into the display film 112, while the excitation light is transmitted to the first display surface 112a. It can be propagated along the first display surface 112a while being alternately reflected between the first display surface 112a and the second display surface 112b.

  In addition, the fluorescent light emitting display 100 introduces excitation light into the display film 112 from the flat first display surface 112a. Even if the display film 112 is thin (for example, 0.1 mm or less) and it is difficult to form the end faces (the first end face 112c and the second end face 112d) flatly, the state of the end face is completely affected. Excitation light can be introduced into the display film 112 without receiving the light. That is, the fluorescent light emitting display 100 introduces excitation light into the display film 112 from the flat first display surface 112a, thereby preventing irregular reflection and the like on the first display surface 112a, and sufficient excitation light incident loss. Can be suppressed. Therefore, the fluorescent light emitting display 100 can sufficiently display information on the display film 112.

  In addition, the fluorescent light emitting display 100 is configured so that the incident surface of the prism is sufficiently large along the Z direction, so that even if the excitation light is misaligned along the Z direction, the excitation light is separated from the incident surface. It can be propagated inside the prism. Therefore, the fluorescent light emitting display 100 can suppress the influence of the positional deviation along the Z direction of the excitation light, and can sufficiently display information on the display film 112.

  In addition, when the fluorescent light emitting display 100 is provided with the joining member 20 on the end surfaces (the first end surface 112c and the second end surface 112d) of the display film 112, the deformation of the joining member 20 (expands at a high temperature and contracts at a low temperature) is affected. Without receiving the light, the excitation light can be introduced into the display film 112 and propagated. Therefore, the fluorescent light emitting display 100 can sufficiently display information on the display film 112 without depending on the change in the shape of the bonding member 20.

  Further, in the fluorescent light emitting display 100, an optical member (for example, an optical fiber or a collimator lens in addition to the prism) that introduces and transmits excitation light into the display film 112 is not adjacent to the end surface of the display film 112. Therefore, when the fluorescent light emitting display 100 is used by filling the joining member 20 in the end faces (the first end face 112c and the second end face 112d) of the display film 112, the display film 112 is used when the optical member is replaced or repaired. Therefore, it is not necessary to remove the joining member 20. In the first place, when the bonding member 20 is filled with the optical member adjacent to the end surface of the display film 112, the optical member is propagated by the bonding member 20 unless the periphery of the optical member is protected by the protective member. The optical path of the excitation light to be changed or the excitation light is greatly attenuated.

  The fluorescent light emitting display 100 uses, as excitation light, infrared light having a relatively longer wavelength and lower light intensity than visible light such as green to display information, and attenuation when entering the display film 112, Attenuation when propagating through the inside of the display film 112 can be sufficiently suppressed.

  According to the fluorescent light-emitting display 100, the first prism 124 includes an incident surface 124a that extends so as to intersect the first display surface 112a and propagates the first excitation light EL11 while being refracted toward the display surface. It is preferable. Furthermore, according to the fluorescent light emitting display 100, the second prism 134 includes an incident surface 134a that extends so as to intersect the display surface and propagates the second excitation light EL12 while being refracted toward the display surface. Is preferred.

  According to the fluorescent light emitting display 100, the excitation light (the first excitation light EL11 and the second excitation light EL12) has a simple configuration using the incident surfaces of the prisms (the first prism 124 and the second prism). Can be introduced into the display film 112 from the first display surface 112a. The excitation light introduced into the display film 112 sufficiently propagates while alternately reflecting between the first display surface 112a and the second display surface 112b.

  In addition, if the length of the incident surface of the prism with respect to the Z direction is sufficiently long, the fluorescent light emitting display 100 receives excitation light having a spot diameter larger than the vertical width along the Z direction of the end surface of the display film 112. It can introduce | transduce into the display film 112 through a surface.

  According to the fluorescent light emitting display 100, it is preferable to have the first collimator lens 123 between the first light source 121 and the first prism 124. Furthermore, according to the fluorescent light emitting display 100, it is preferable to have the second collimator lens 133 between the second light source 131 and the second prism 134.

  According to the fluorescent light emitting display 100, since the beam shape of the excitation light (the first excitation light EL11 and the second excitation light EL12) propagating through the display film 112 becomes constant, the size of the display pixel in the display film 112 is increased. This can be made constant along the propagation direction of the excitation light. Therefore, the fluorescent light emitting display can make the size of the display pixels on the display film 112 uniform without depending on the position of the display film 112.

  According to the fluorescent display 100, the first prism 124 preferably has the same refractive index as the display film 112. Furthermore, according to the fluorescent light emitting display 100, the second prism 134 preferably has the same refractive index as the display film 112.

  According to the fluorescent light emitting display 100, excitation light (first excitation light EL11 and second excitation light EL12) at the interface between the prisms (first prism 124 and second prism 134) and the display film 112 is displayed. Reflection loss can be minimized. Therefore, the fluorescent light emitting display 100 can sufficiently propagate the excitation light into the display film 112.

  According to the fluorescent light emitting display 100, the first excitation light EL11 reflects and propagates inside the display film 112, and the first prism 124 reflects from the optical path K1 of the first excitation light EL11 that reflects and propagates. It is preferable to contact the first display surface 112a of the separated part B1. Further, according to the fluorescent display 100, the second excitation light EL12 reflects and propagates inside the display film 112, and the second prism 134 reflects and propagates the optical path of the second excitation light EL12. It is preferable that the first display surface 112a of the portion B1 spaced apart from the first contact surface 112a.

  According to the fluorescent light emitting display 100, the excitation light (the first excitation light EL11 and the second excitation light EL12) reflected and propagated inside the display film 112 is converted into the prisms (the first prism 124 and the second excitation light EL12). It is possible to prevent the light from entering (returning to) the prism 134).

  According to the fluorescent light emitting display 100, the first light source 121 includes a plurality of second light sources 131, and the control unit 140 includes a specific first light source 121 corresponding to a specific position of the display film 112. And the second light source 131 is controlled.

  According to the fluorescent light emitting display 100, information is displayed by generating fluorescence while crossing the first excitation light EL11 and the second excitation light EL12 at a specific position of the display film 112 with a very simple configuration. be able to.

  According to the fluorescent light emitting display 100, as an example, the display film 112 can be attached to the windshield 11 of the vehicle 10 and used.

  According to the fluorescent light emitting display 100, the driver of the vehicle 10 confirms various information (G1, G2, and G3 in FIG. 1) displayed on the display film 112 while sufficiently viewing the front of the vehicle 10. can do.

  In the first embodiment, regarding the fluorescent display 100 and the control method thereof, the first excitation light EL11 is introduced from the first display surface 112a to the display film 112 via the first prism 124, and the second excitation is performed. Although the light EL 12 has been described as being configured to be introduced from the first display surface 112 a to the display film 112 via the second prism 134, it is not limited to such a configuration. The fluorescent light emitting display 100 is configured to introduce at least the first excitation light EL11 from the first display surface 112a to the display film 112 via the first prism 124, and is adjacent to the first end surface 112c of the display film 112. The joining member 20 may be provided.

(Modification 1 of the first embodiment)
FIG. 5 is a side view schematically showing the main part of the fluorescent light-emitting display according to Modification 1 of the first embodiment.

  The fluorescent light-emitting display according to Modification 1 of the first embodiment is the first embodiment described above in that a transparent covering member 211 is attached to the display film 112 so that excitation light does not leak from the display film 112. This is different from the fluorescent light emitting display 100 according to FIG.

  In the fluorescent light-emitting display according to the first modification of the first embodiment, the configuration of the display unit 210 that is different from the configuration of the first embodiment described above will be described.

  With reference to FIG. 5, in the display unit 210, the covering member 211 is formed in a film shape thinner than the display film 112. The covering member 211 is made of a transparent material over the entire visible light range (purple to red). The covering member 211 is made of a material having a refractive index smaller than that of the display film 112 in the light having the wavelengths of the first excitation light EL11 and the second excitation light EL12. The covering member 211 is composed of, for example, a pair, and is adhered so as to be in close contact with both surfaces of the display film 112.

  The covering member 211 is not in contact with the first prism 124 of the first light source unit 120. That is, the first prism 124 is in contact with the display film 112 without interfering with the covering member 211. The covering member 211 is in contact with the display film 112 in the portion B2 that is separated from the optical path K2 from the first prism 124 to the display film 112 in the first excitation light EL11. With this configuration, the first excitation light EL11 can propagate while being reflected from the inside of the display film 112 after entering the display film 112 from the first prism 124.

  Similar to the first prism 124 of the first light source unit 120, the covering member 211 is not in contact with the second prism 134 of the second light source unit 130.

  The display film 112 and the covering member 211 correspond to a relationship between a so-called optical fiber core and cladding (having a smaller refractive index than the core). That is, the first excitation light EL11 and the second excitation light EL12 are generated by the interface between the first display surface 112a of the display film 112 and the covering member 211 and between the second display surface 112b of the display film 112 and the covering member 211. It propagates inside the display film 112 while being reflected at the interface.

  The effect of the modification 1 of 1st Embodiment demonstrated above is demonstrated.

  The fluorescent light-emitting display has a covering member 211. The covering member 211 is incident on the display film 112 from the optical path K2 until the first excitation light EL11 enters the display film 112 from the first prism 124 and from the second prism 134 in the second excitation light EL12. The first display surface 112a of the portion B2 spaced from the optical path. The covering member 211 has a refractive index smaller than that of the display film 112 in the light having the wavelengths of the first excitation light EL11 and the second excitation light EL12.

  According to such a fluorescent light emitting display, the first excitation light EL11 and the second excitation light EL12 propagating in the display film 112 are reflected at the interface between the display film 112 and the covering member 211, whereby the display film 112 is displayed. To the outside can be prevented. Therefore, the fluorescent light emitting display can appropriately display information on the display film 112. That is, the covering member 211 is a member that prevents the first excitation light EL11 and the second excitation light EL12 from being emitted from the surface by being brought into contact with an arbitrary surface of the display film 112. Can be used.

  Here, in the case where the display member 112 is provided with the covering member 211, the fluorescent light emitting display is used by being attached to, for example, the windshield 11 so that the covering member 211 faces the windshield 11 side. If comprised in this way, the 1st excitation light EL11 and 2nd excitation light EL12 which propagate the inside of the display film 112 will not enter into the windshield 11 from the display film 112, but the display film 112 and the coating | coated member 211. And continue to propagate inside the display film 112. Accordingly, the fluorescent light emitting display can appropriately display information on the display film 112 without being obstructed by the windshield 11.

  Further, when the fluorescent light emitting display includes the covering member 211 on both surfaces of the display film 112, the covering member 211 can be opposed to the indoor side of the vehicle 10 in addition to the windshield 11 side. . If comprised in this way, the 1st excitation light EL11 and 2nd excitation light EL12 which propagate the display film 112 will inject into the water drop and oil film which adhered to the coating | coated member 211 located in the room interior side of the vehicle 10. FIG. Instead, the light is reflected at the interface between the display film 112 and the covering member 211 and continues to propagate inside the display film 112. Therefore, the fluorescent light-emitting display can appropriately display information on the display film 112 without being obstructed by water droplets or an oil film adhered from the indoor side of the vehicle 10.

(Modification 2 of the first embodiment)
FIG. 6 is a perspective view schematically showing the main part of the fluorescent light-emitting display according to Modification 2 of the first embodiment.

  The fluorescent light-emitting display according to the second modification of the first embodiment is different from the fluorescent light-emitting display according to the first embodiment and the first modification described above in that information is displayed in full color.

  The fluorescent light-emitting display according to the second modification of the first embodiment is a “one form” that embodies a configuration for displaying information in full color.

  In the fluorescent light emitting display, the display film 112 has two or more other light emitters (phosphor fine particles 311 and phosphor fine particles 312) that emit other fluorescent light (red and blue) having a wavelength different from that of the fluorescent light (green). ) Is further dispersed and held.

  In this fluorescent light-emitting display, red, green and blue phosphor particles 111 (emits green fluorescence), phosphor fine particles 311 (emits red fluorescence) and phosphor fine particles 312 (emits blue fluorescence). Fluorescence of light of wavelength.

  Regarding the fluorescent light emitting display according to the second modification of the first embodiment, the configurations of the display unit 310, the first light source unit 320, and the second light source unit 330 different from the configurations of the first embodiment and the first modification described above. explain.

  Referring to FIG. 6, in display unit 310, display film 112 holds phosphor fine particles 311 and phosphor fine particles 312 uniformly and densely dispersed in addition to phosphor fine particles 111.

  Table 2 shows optical characteristics of the phosphor fine particles 311 and the phosphor fine particles 312 in addition to the phosphor fine particles 111.

The phosphor fine particles 311 are constituted by doping the base material NaYF ₄ with praseodymium (Pr) as a light emitting material. When the phosphor fine particles 311 are excited by the third excitation light EL21 (infrared light having a wavelength of 1014 nm) and the fourth excitation light EL22 (infrared light having a wavelength of 840 nm), Pr ³⁺ ions The red second fluorescence RL2 that is visible light is emitted in accordance with the transition from the energy level. The phosphor fine particles 311 do not emit fluorescence only by the third excitation light EL21 or the fourth excitation light EL22.

The phosphor fine particles 312 are configured by doping the base material NaYF ₄ with thulium (Tm) as the light emitting material. When the phosphor fine particles 312 are excited by the fifth excitation light EL31 (infrared light having a wavelength of 800 nm) and the sixth excitation light EL32 (infrared light having a wavelength of 1120 nm), Tm ³⁺ ions The blue third fluorescence RL3, which is visible light, is emitted along with the transition from the energy level. The phosphor fine particles 312 do not emit fluorescence only by the fifth excitation light EL31 or the sixth excitation light EL32.

  Referring to FIG. 6, the first light source unit 320 includes a third light source 321 and a fifth light source 323 in addition to the configuration of the first light source unit 120 described above.

  The third light source 321 emits third excitation light EL21. The third light source 321 has the same configuration as that of the first light source 121 except for the specification of the optical element related to the oscillation wavelength. The third light source 321 propagates the third excitation light EL21 to the light distribution optical fiber 322 suitable for the wavelength.

  The fifth light source 323 emits the fifth excitation light EL31. The fifth light source 323 has the same configuration as that of the first light source 121 except for the specification of the optical element related to the oscillation wavelength. The fifth light source 323 propagates the fifth excitation light EL31 to the light distribution optical fiber 324 suitable for the wavelength.

  The control unit 140 controls the light emission timings of the first light source 121, the third light source 321, and the fifth light source 323.

  The multiplexer 325 is configured, for example, by heating and melting the outgoing portions of the light distribution optical fiber 221, the light distribution optical fiber 322, and the light distribution optical fiber 324 while stretching them. The multiplexer 325 includes the pumping light (the first pumping light EL11, the third pumping light EL21, and the first pumping light emitted from the light distributing optical fiber 221, the light distributing optical fiber 322, and the light distributing optical fiber 324, respectively. 5 excitation lights EL31).

  The relay optical fiber 326 propagates each pump light combined by the multiplexer 325 to the light distributor 327. The relay optical fiber 326 corresponds to each excitation light.

  The light distributor 327 selectively propagates the plurality of first optical fibers 328 while branching each pumping light propagated from the relay optical fiber 326. The light distributor 327 propagates the first excitation light EL11, the third excitation light EL21, and the fifth excitation light EL31 independently of the plurality of first optical fibers 328 based on the control of the control unit 140. To do.

  The light distributor 327 includes, for example, a so-called MEMS (Micro Electronic Mechanical Systems: MEMS). The light distributor 327 includes a minute mirror, and converts the first excitation light EL11, the third excitation light EL21, and the fifth excitation light EL31 emitted from the relay optical fiber 326 into a plurality of first optical fibers. Propagate selectively to 328.

  The light distributor 327 branches the first pumping light EL11, the third pumping light EL21, and the fifth pumping light EL31 emitted from the relay optical fiber 326 multiple times by so-called waveguides, One optical fiber 328 may be configured to propagate simultaneously. In this case, the light distributor 327 is provided with an optical shutter for each of the plurality of first optical fibers 328, and the first excitation light EL11, the third excitation light EL21, and the fifth excitation light. EL31 is selectively passed. The shutter is composed of, for example, a liquid crystal element that functions as an optical switch.

  The first excitation light EL11, the third excitation light EL21, and the fifth excitation light EL31 emitted from the plurality of first optical fibers 328 are transmitted through the corresponding first collimator lenses 123, respectively. The light enters the prism 124.

  Referring to FIG. 6, the second light source unit 330 includes a fourth light source 331, a sixth light source 333 and the like in addition to the second light source unit 130 described above.

  The fourth light source 331 emits the fourth excitation light EL22. The fourth light source 331 has the same configuration as the second light source 131 except for the specifications of the optical element related to the oscillation wavelength. The fourth light source 331 propagates the fourth excitation light EL22 to the light distribution optical fiber 332.

  The sixth light source 333 emits sixth excitation light EL32. The sixth light source 333 has the same configuration as the second light source 131 except for the specifications of the optical element related to the oscillation wavelength. The sixth light source 333 propagates the sixth excitation light EL32 to the light distribution optical fiber 334.

  The control unit 140 controls the light emission timings of the second light source 131, the fourth light source 331, and the sixth light source 333.

  The multiplexer 335 is configured, for example, by heating and melting the outgoing portions of the light distribution optical fiber 231, the light distribution optical fiber 332, and the light distribution optical fiber 334. The multiplexer 335 includes each of the pumping light (second pumping light EL12, fourth pumping light EL22, and second pumping light emitted from the light distributing optical fiber 231, the light distributing optical fiber 332, and the light distributing optical fiber 334. 6 excitation lights EL32).

  The relay optical fiber 336 propagates each excitation light combined by the multiplexer 335 to the light distributor 337. The relay optical fiber 336 corresponds to each excitation light.

  The light distributor 337 selectively propagates the plurality of second optical fibers 338 while branching each pumping light propagated from the relay optical fiber 336. The light distributor 337 has the same specifications as the light distributor 327 described above, but has a configuration corresponding to each excitation light. The plurality of second optical fibers 338 propagate the second excitation light EL12, the fourth excitation light EL22, and the sixth excitation light EL32 toward the second collimator lens 133, respectively.

  The effect of the modification 2 of 1st Embodiment demonstrated above is demonstrated.

  In the fluorescent light emitting display, the display film 112 has two or more other light emitters (phosphor fine particles 311 and phosphor fine particles 312) that emit other fluorescent light (red and blue) having a wavelength different from that of the fluorescent light (green). ) Is further dispersed and held. The fluorescent fine particles 111 (emits green fluorescence), the phosphor fine particles 311 (emits red fluorescence), and the phosphor fine particles 312 (emits blue fluorescence) to fluoresce light of red, green and blue wavelengths. To emit.

  According to such a fluorescent light-emitting display, information displayed on the display film 112 can be expressed by so-called full color from purple to red by mixing three colors of red, green and blue.

  According to the fluorescent light emitting display, it is preferable to have a multiplexer 325. The multiplexer 325 combines the first excitation light EL11, the third excitation light EL21, and the fifth excitation light EL31 (relay optical fiber 326, light distributor 327, first optical fiber 328 and Incident on first prism 124 (via first collimator lens 123).

  According to such a fluorescent light emitting display, it is possible to propagate the excitation light of the three types of wavelengths densely as compared to the case of independently propagating the excitation light of the three types of wavelengths. That is, the size of one pixel can be reduced when red, green, and blue light are combined and propagated as compared with the case where red, green, and blue are propagated independently of each other. Therefore, the up-conversion fluorescent display can further improve the resolution of the display film 112.

  Here, the fluorescent light emitting display combines the second excitation light EL12, the fourth excitation light EL22, and the sixth excitation light EL32 (relay optical fiber 336, light distributor 337, second optical fiber). And a multiplexer 335 that is incident on the second prism (via 338 and the second collimator lens 133). Therefore, the fluorescent light emitting display has the same effect as the above-described multiplexer 325 even in the multiplexer 335.

(Modification 3 of the first embodiment)
FIG. 7 is a perspective view schematically showing a main part of a fluorescent light emitting display according to Modification 3 of the first embodiment.

  The fluorescent light emitting display according to the third modification of the first embodiment is different from the fluorescent light emitting display according to the second modification of the first embodiment described above in that information is displayed in full color by a combination of fewer phosphor fine particles and a light source. To do. That is, in Modification 3 of the first embodiment, two types of phosphor fine particles and four types of light sources are used. In Modification 2 of the first embodiment described above, three types of phosphor fine particles and six types of light sources are used.

  The fluorescent light-emitting display according to the third modification of the first embodiment is an “other form” that embodies a configuration for displaying information in full color.

  In the fluorescent light-emitting display, the display film 112 further holds one or more other light emitters (one of the phosphor fine particles 312) that emit other fluorescence (blue) having a wavelength different from that of the fluorescence (green). doing.

  In this fluorescent light emitting display, fluorescent fine particles 111 (which emit red and green fluorescence) and fluorescent fine particles 312 (which emit blue fluorescence) emit light of red, green and blue wavelengths.

  In the fluorescent light emitting display according to the third modification of the first embodiment, the configurations of the display unit 410, the first light source unit 420, and the second light source unit 430, which are different from the configurations of the first embodiment and the first and second modifications. Will be described.

  Referring to FIG. 7, in display unit 410, display film 112 holds phosphor fine particles 312 uniformly and densely dispersed in addition to phosphor fine particles 111.

  Table 3 shows optical characteristics of the phosphor fine particles 111 and the phosphor fine particles 312.

The phosphor fine particles 111 described above are excited by the first excitation light EL11 (infrared light having a wavelength of 1550 nm) and the seventh excitation light EL42 (infrared light having a wavelength of 1120 nm), respectively. Along with the transition from the energy level of the Er ³⁺ ion, a fourth fluorescence RL4 corresponding to light having a red wavelength that is visible light is emitted. The phosphor fine particles 111 do not emit fluorescence only by the first excitation light EL11 or the seventh excitation light EL42.

When the phosphor fine particles 312 described above are excited by the eighth excitation light EL51 (infrared light having a wavelength of 800 nm) and the seventh excitation light EL42, the phosphor fine particles 312 are accompanied by a transition from the energy level of the Tm ³⁺ ion. The blue fifth fluorescence RL5 that is visible light is emitted. The phosphor fine particles 312 do not emit fluorescence only by the eighth excitation light EL51 or the seventh excitation light EL42.

  Referring to FIG. 7, first light source unit 420 includes an eighth light source 421 in addition to the configuration of first light source unit 120 described above.

  The eighth light source 421 emits the above-described eighth excitation light EL51. The eighth light source 421 has the same configuration as that of the first light source 121 except for the specification of the optical element related to the oscillation wavelength. The eighth light source 421 propagates the eighth excitation light EL51 to the light distribution optical fiber 422 suitable for the wavelength.

  The control unit 140 controls the light emission timings of the first light source 121 and the eighth light source 421.

  The multiplexer 423 is configured, for example, by heating and melting the outgoing portions of the light distribution optical fiber 221 and the light distribution optical fiber 422 while melting them. The multiplexer 423 multiplexes the respective excitation lights (first excitation light EL11 and eighth excitation light EL51) emitted from the light distribution optical fiber 221 and the light distribution optical fiber 422.

  The relay optical fiber 424 propagates each pumping light combined by the multiplexer 423 to the light distributor 425. The relay optical fiber 424 corresponds to each excitation light.

  The light distributor 425 selectively propagates the plurality of first optical fibers 426 while branching each pumping light propagated from the relay optical fiber 424. The light distributor 425 has the same specifications as the light distributor 327 described above, but has a configuration corresponding to each excitation light. The plurality of first optical fibers 426 propagate the first excitation light EL11 and the eighth excitation light EL51 toward the first collimator lens 123, respectively.

  Referring to FIG. 7, second light source unit 430 includes a seventh light source 431 in addition to the configuration of second light source unit 130 described above.

  The seventh light source 431 emits the seventh excitation light EL42 described above. The seventh light source 431 has the same configuration as the second light source 131 except for the specifications of the optical element related to the oscillation wavelength. The seventh light source 431 propagates the seventh excitation light EL42 to the light distribution optical fiber 432 suitable for the wavelength.

  The timing of light emission of the second light source 131 and the seventh light source 431 is controlled by the control unit 140.

  For example, the multiplexer 433 is formed by heating and melting the outgoing portions of the light distribution optical fiber 231 and the light distribution optical fiber 432 while stretching them. The multiplexer 433 multiplexes the respective excitation lights (second excitation light EL12 and seventh excitation light EL42) emitted from the light distribution optical fiber 231 and the light distribution optical fiber 432.

  The relay optical fiber 434 propagates each excitation light combined by the multiplexer 433 to the light distributor 435. The relay optical fiber 434 corresponds to each excitation light.

  The light distributor 435 selectively propagates the plurality of second optical fibers 436 while branching each pumping light propagated from the relay optical fiber 434. The light distributor 435 has the same specifications as the light distributor 337 described above, but has a configuration corresponding to each excitation light. The plurality of second optical fibers 436 propagate the second excitation light EL12 and the seventh excitation light EL42 toward the second collimator lens 133, respectively.

  The effect of the modification 3 of 1st Embodiment demonstrated above is demonstrated.

  In the fluorescent light-emitting display, the display film 112 further holds one or more other light emitters (one of the phosphor fine particles 312) that emit other fluorescence (blue) having a wavelength different from that of the fluorescence (green). doing. The fluorescent fine particles 111 (which emit red and green fluorescence) and the fluorescent fine particles 312 (which emit blue fluorescence) emit light of red, green and blue wavelengths.

  According to such a fluorescent light-emitting display, even when two types of phosphor fine particles and four types of light sources are used, the information displayed on the display film 112 is mixed with three colors of red, green, and blue. It can be expressed by so-called full color from red to red.

(Second Embodiment)
FIG. 8 is a side view showing a main part of the fluorescent light-emitting display according to the second embodiment. In FIG. 8, illustration of the phosphor fine particles 111 is omitted.

  In the fluorescent light emitting display according to the second embodiment, for example, the first excitation light EL11 whose beam shape is reduced by the first cylindrical lens 526 is displayed on the display film 512 (thinner than the display film 112) via the first prism 124. ) Is different from the fluorescent light-emitting display according to the second embodiment described above.

  In the fluorescent display according to the second embodiment, the configuration of the display unit 510 and the light source unit (particularly the first light source unit 520) different from the configuration of the first embodiment described above will be described.

  In the display unit 510, the display film 512 is formed with a smaller thickness along the Z direction than the display film 112. That is, the first end surface 512 c of the display film 512 is shorter in the vertical direction (Z direction) than the first end surface 112 c of the display film 112. The display film 512 has the same configuration as the display film 112 except for the thickness.

  The first light source unit 520 has the same configuration as that of the first light source unit 120 except that the first light source unit 520 includes the first cylindrical lens 526. As shown in FIG. 8, the first cylindrical lens 526 is disposed between the first collimator lens 123 and the incident surface 124 a of the first prism 124. In the first cylindrical lens 526, a convex incident surface 526a extending along the Y direction is opposed to the first collimator lens 123. In the first cylindrical lens 526, a planar emission surface 526b extending along the Y direction is opposed to the incident surface 124a of the first prism 124. The first cylindrical lens 526 reduces the first excitation light EL <b> 11 by condensing it in the vertical direction (Z direction) that is the thickness direction of the display film 512. The cylindrical lens of the second light source unit has the same configuration as that of the first cylindrical lens 526 of the first light source unit 520.

  The operational effects of the second embodiment described above will be described.

  In the fluorescent light-emitting display, a first cylindrical lens 526 is provided between the first light source 121 and the first prism 124. Further, in the fluorescent light-emitting display, a second cylindrical lens is provided between the second light source 131 and the second prism 134.

  According to such a fluorescent light emitting display, the shape of the excitation light (the first excitation light EL11 and the second excitation light EL12) is changed to that of the display film 512 by the cylindrical lenses (the first cylindrical lens 526 and the second cylindrical lens). It shrinks with respect to the top and bottom (Z direction) which is the thickness direction. Therefore, the fluorescent light-emitting display can introduce excitation light into the display film 512 having a relatively small thickness.

  Here, the first cylindrical lens 526 of the first light source unit 520 does not reduce the first excitation light EL11 with respect to the lateral width (Y direction) of the display film 512. Similarly, the second cylindrical lens of the second light source unit does not reduce the second excitation light EL12 with respect to the lateral width (X direction) of the display film 512. Therefore, the fluorescent light emitting display can maintain the display pixels on the display film 512 uniformly while reducing the excitation light along the top and bottom (Z direction) which is the thickness direction of the display film 512.

  In addition, in the fluorescent light-emitting display, since the excitation light is reduced along the thickness direction of the display film 512 by the cylindrical lenses (the first cylindrical lens 526 and the second cylindrical lens), the energy density of the excitation light increases. Thus, the luminance of the first fluorescence RL1 in the display film 512 is increased. Therefore, the fluorescent light emitting display can improve the visibility of the information displayed by the first fluorescent light RL1.

  Further, since the fluorescent light emitting display can use a relatively thin display film 512, the transmittance of the display film 512 is improved. Therefore, the fluorescent light emitting display can make it easy to visually recognize the front through the display film 512.

  In addition, since the fluorescent display can use a relatively thin display film 512, it is easy to use the display film 512 by curving it. Therefore, the fluorescent display can enhance versatility. For example, the display film 512 can be easily attached to the curved windshield 11.

(Modification of the second embodiment)
FIG. 9 is a side view showing a main part of a fluorescent light emitting display according to a modification of the second embodiment. In FIG. 9, illustration of the phosphor fine particles 111 is omitted.

  The fluorescent light emitting display according to the modification of the second embodiment is, for example, in that the first excitation light EL11 is reduced by the first prism 624 and introduced into the display film 512 (thinner than the display film 112). This is different from the fluorescent light emitting display according to the second embodiment.

  In the fluorescent light emitting display according to the modification of the second embodiment, a configuration of a light source unit (particularly, the first light source unit 620) different from the configuration of the second embodiment described above will be described.

  The first light source unit 620 has the same configuration as the first light source unit 120 except for the first prism 624. As shown in FIG. 9, the incident surface 624a of the first prism 624 is a convex cylindrical surface extending along the Y direction. The first prism 624 unites a part of the first cylindrical lens 526 of the second embodiment (upper portion along the Z direction) on the incident surface 124a side of the first prism 124 of the first embodiment. This corresponds to the configuration. The first prism 624 has the same configuration as that of the first prism 124 except for the shape of the incident surface 624a.

  The incident surface 624a of the first prism 624 reduces the first excitation light EL11 by condensing the first excitation light EL11 in the vertical direction (Z direction) that is the thickness direction of the display film 512, and the first excitation light. EL11 is introduced from the emission surface 624b to the first display surface 512a of the display film 512. The second prism of the second light source unit has the same configuration as the first prism 624 of the first light source unit 620.

  The effect of the modification of 2nd Embodiment demonstrated above is demonstrated.

  In the fluorescent display, the incident surface 624a of the first prism 624 is a convex cylindrical surface. Further, in the fluorescent light emitting display, the incident surface of the second prism is a convex cylindrical surface.

  According to such a fluorescent light emitting display, excitation light (first excitation light EL11 and second excitation light EL12) is generated by the incident surface of the prism (the incident surface 624a of the first prism 624 and the incident surface of the second prism). Is reduced along the vertical direction (Z direction) which is the thickness direction of the display film 512. Therefore, the fluorescent light-emitting display can introduce excitation light into the display film 512 having a relatively small thickness.

  Here, like the cylindrical lens of the second embodiment, the prism does not reduce the excitation light with respect to the lateral width (Y direction and X direction) of the display film 512. Therefore, the size of the display pixel on the display film 512 is reduced. Can be maintained uniformly.

  In addition, the fluorescent light emitting display can reduce the excitation light along the thickness direction of the display film 512 without increasing the number of parts by configuring the incident surface of the prism from a convex cylindrical surface. That is, the fluorescent light emitting display can reduce the excitation light without increasing the manufacturing cost.

  In addition, as in the cylindrical lens of the second embodiment, the prism reduces the excitation light and increases the energy density of the excitation light, thereby increasing the luminance of the first fluorescence RL1 in the display film 512 and displaying the prism. The visibility of information can be improved. Further, like the cylindrical lens of the second embodiment, the prism uses a relatively thin display film 512 to improve the transmittance of the display film 512 so that the front can be easily seen through the display film 512. be able to. Further, the prism can be easily bent and the versatility can be improved by using a relatively thin display film 512 as in the cylindrical lens of the second embodiment.

(Third embodiment)
FIG. 10 is a side view showing a main part of the fluorescent light-emitting display according to the third embodiment. In FIG. 10, illustration of the phosphor fine particles 111 is omitted.

  The fluorescent light-emitting display according to the third embodiment is, for example, the fluorescent light according to the first and second embodiments described above in that the first excitation light EL11 is reflected by the first prism 724 and introduced into the display film 112. It differs from the light emitting display.

  In the fluorescent display according to the third embodiment, a configuration of a light source unit (particularly, the first light source unit 720) different from the configurations of the first and second embodiments described above will be described.

  As shown in FIG. 10, the first prism 724 introduces the first excitation light EL11 from the first display surface 112a to the display film 112, and the first excitation light EL11 travels along the first display surface 112a. It is propagated in the X direction. As shown in FIG. 10, the first prism 724 has a trapezoidal shape with a square side face and lacks one end (lower left in the figure), and is formed by a rectangular parallelepiped extending in the Y direction.

  The first prism 724 corresponds to the upper surface and corresponds to the planar incident surface 724a along the first display surface 112a, and a portion lacking one end of the square, and the outer side intersects the first display surface 112a. A flat reflecting surface 724b inclined to the surface, and a flat emitting surface 724c corresponding to the lower surface and in close contact with the first display surface 112a of the display film 112.

  The first prism 724 is made of the same material as the display film 112. The first prism 724 has a reflective film 724d coated on the outside of the reflective surface 724b. The reflective film 724d is made of a metal thin film and reflects the first excitation light EL11.

  The first prism 724 is bonded to the first display surface 112 a so that the reflection surface 724 b faces the upper edge of the first end surface 112 c of the display film 112. The exit portion of the first optical fiber 122 and the first collimator lens 123 are vertically arranged from the upper side to the lower side in the Z direction so as to face the incident surface 724a of the first prism 724.

  As shown in FIG. 10, the first prism 724 causes the first excitation light EL11 propagating along the lower side in the Z direction to enter from the incident surface 724a, and then lowers in the Z direction and in the X direction by the reflecting surface 724b. While being reflected and propagated, the light is introduced (obliquely incident) from the exit surface 724 c to the first display surface 112 a of the display film 112. The first excitation light EL11 propagates in the X direction along the first display surface 112a while being alternately reflected between the first display surface 112a and the second display surface 112b of the display film 112. The second prism of the second light source unit has the same configuration as the first prism 724 of the first light source unit 720.

  The operational effects of the third embodiment described above will be described.

  The fluorescent light emitting display includes a reflective surface 724b in which the first prism 724 extends so as to intersect the first display surface 112a and propagates while reflecting the first excitation light EL11 toward the first display surface 112a. ing. Further, the fluorescent light-emitting display includes a reflection surface on which the second prism extends so as to intersect the first display surface 112a and propagates while reflecting the second excitation light EL12 toward the first display surface 112a. ing.

  According to such a fluorescent light emitting display, excitation light (first excitation light EL11 and second excitation light EL12) is emitted by a simple configuration using the reflecting surfaces of the prisms (first prism 724 and second prism). It can introduce into the display film 112 from the 1st display surface 112a. The excitation light introduced into the display film 112 sufficiently propagates while alternately reflecting between the first display surface 112a and the second display surface 112b.

  In addition, if the length of the reflecting surface of the prism in the Z direction is made sufficiently long, the fluorescent light emitting display emits excitation light having a spot diameter larger than the vertical width along the Z direction of the end surface of the display film 112 on the reflecting surface. Can be introduced into the display film 112.

  In addition, since the fluorescent light emitting display reflects and propagates the excitation light by the reflecting surface of the prism, for example, a plurality of excitation lights having different wavelengths are the same as in Modification 2 and Modification 3 of the first embodiment. By propagating through the reflecting surface, the influence of chromatic aberration can be avoided. That is, the fluorescent light-emitting display can prevent each excitation light from changing into a relatively different shape depending on the wavelength when propagating a plurality of excitation lights.

  In addition, when the reflecting surface of the prism is a flat surface (a surface defined by an infinite curvature radius), the excitation light beam reflected by the reflecting surface is not affected by the irradiation angle of the exciting light with respect to the reflecting surface. The shape does not expand. That is, the fluorescent light emitting display can prevent the excitation light reflected on the reflection surface and introduced into the display film 512 from being reduced due to light kicking or the like accompanying the expansion of the beam shape.

(Fourth embodiment)
FIG. 11 is a side view showing a main part of the fluorescent light-emitting display according to the fourth embodiment. In FIG. 11, illustration of the phosphor fine particles 111 is omitted.

  In the fluorescent light emitting display according to the fourth embodiment, for example, the first excitation light EL11 is reflected by being reduced by the first prism 824 and introduced into the display film 512 (thinner than the display film 112). This is different from the fluorescent light emitting display according to the third embodiment.

  In the fluorescent display according to the fourth embodiment, a configuration of a light source unit (particularly, the first light source unit 820) different from the configurations of the first to third embodiments described above will be described.

  The first light source unit 820 has the same configuration as the first light source unit 720 except for the first prism 824. As shown in FIG. 11, the first prism 824 includes a concave cylindrical surface whose reflecting surface 824 b extends along the Y direction. The first prism 824 has the same configuration as the first prism 724 except for the shape of the reflecting surface 824b. The reflection surface 824b reduces the first excitation light EL11 incident from the incident surface 824a by condensing the first excitation light EL11 in the vertical direction (Z direction) that is the thickness direction of the display film 512, and the first excitation light. EL 11 is introduced from the emission surface 824 c to the first display surface 512 a of the display film 512. The second prism of the second light source unit has the same configuration as the first prism 824 of the first light source unit 820.

  The operational effects of the fourth embodiment described above will be described.

  In the fluorescent light emitting display, the reflection surface 824b of the first prism 824 is formed of a concave cylindrical surface. Further, in the fluorescent light emitting display, the reflection surface of the second prism is a concave cylindrical surface.

  According to such a fluorescent light-emitting display, the excitation light (first excitation light EL11 and second excitation light EL12) is reflected by the reflecting surface formed of the concave cylindrical surface of the prism (first prism 824 and second prism). The shape is reduced along the vertical direction (Z direction) which is the thickness direction of the display film 512. Therefore, the fluorescent light-emitting display can introduce excitation light into the display film 512 having a relatively small thickness.

  Here, as in the first to third embodiments, the prism does not reduce the excitation light with respect to the lateral width (Y direction and X direction) of the display film 512, and thus the size of the display pixel on the display film 512. Can be maintained uniformly.

  In addition, the prism provided with the reflecting surface is not affected by chromatic aberration even when a plurality of excitation lights having different wavelengths are propagated by the same reflecting surface, as in the third embodiment. Can be prevented from changing to a relatively different shape depending on the wavelength.

  Further, the prism in which the reflecting surface of the prism is formed of a concave cylindrical surface can reduce the excitation light without increasing the number of parts (manufacturing cost), as in the prism of the modification of the second embodiment. .

  Also, the prism increases the luminance of the first fluorescent light RL1 in the display film 512 by reducing the excitation light and increasing the energy density of the excitation light, similarly to the second embodiment and the modification thereof, thereby displaying the prism. The visibility of information to be performed can be improved. Further, as in the second embodiment and its modification, the prism uses a relatively thin display film 512 to improve the transmittance of the display film 512 so that the front can be easily seen through the display film 512. can do. In addition, the prism can be easily bent and versatility can be improved by using a relatively thin display film 512 as in the second embodiment and its modification.

  In addition, the present invention can be variously modified based on the configurations described in the claims, and these are also within the scope of the present invention.

  For example, in the embodiment, the fluorescent light emitting display has been described as a configuration in which the excitation light emitted from the light source is propagated to the prism via an optical fiber, a collimator lens, or the like, but is not limited to such a configuration. Absent. For example, the fluorescent light emitting display may be configured to propagate the excitation light emitted from the light source directly to the prism.

  Further, in the embodiment, the fluorescent light emitting display has been described as a configuration in which excitation light incident from the first display surface of the display film is propagated while being alternately reflected between the first display surface and the second display surface. However, it is not limited to such a configuration. For example, the fluorescent light emitting display may be configured to propagate the excitation light incident from the first display surface of the display film without being reflected between the first display surface and the second display surface. In such a configuration, the excitation light is made incident from the first display surface of the display film at a very small angle (for example, the incident angle with respect to the first display surface is about 1 degree), or the thickness (Z direction) of the display surface is sufficient. This is realized by increasing the thickness of the display surface or by sufficiently reducing the size of the display surface (X direction and Y direction).

  Further, in the embodiment, the fluorescent light emitting display displays various information in a planar form (two-dimensional) by emitting fluorescence by crossing a plurality of first excitation lights and a plurality of second excitation lights in a lattice pattern on the display film. However, the present invention is not limited to such a configuration. For example, a configuration may be adopted in which information is displayed linearly (one-dimensionally) by emitting fluorescence by crossing one first excitation light and a plurality of second excitation lights on a display film. The information displayed linearly (one-dimensionally) is, for example, information represented by the length of the bar, and is information on the speed of the vehicle displayed with the length of the bar being increased in proportion to the speed of the vehicle. Alternatively, a configuration may be adopted in which information is displayed in a dotted manner by emitting fluorescence by crossing one first excitation light and one second excitation light on a display film. In this case, the size of one pixel is configured to be sufficiently large. The information displayed in a dotted manner is information that informs a vehicle occupant of a danger such as a pedestrian jumping out, for example, by turning it off normally and turning it on in an emergency.

  Further, in the embodiment, the fluorescent light emitting display has been described as a display device used in the vehicle 10, but is not limited to such a configuration. For example, the fluorescent light-emitting display may be configured to display various information as a so-called television, or to be installed outdoors to display information on traffic and advertisement.

  Moreover, in embodiment, although demonstrated as a structure which affixes and uses a fluorescent light emission display on the windshield 11, it is not limited to such a structure. For example, it is good also as a structure which affixes and uses a fluorescent light emission display on the side surface facing the driver's seat of the dashboard of the vehicle 10. FIG.

  Moreover, in embodiment, although the fluorescence light emission display demonstrated as a structure which displays information from the single side | surface (1st display surface) of a display film, it is not limited to such a structure. For example, the fluorescent light emitting display is arranged so as to stand on a pedestal installed in a public facility or the like without being attached to the windshield 11 or the like, and from both sides of the display film (first display surface and second display surface). The information may be displayed. The information is, for example, a weather forecast represented by sun, clouds and rain marks.

10 vehicles,
11 Windshield,
11c 1st end surface,
11d second end surface,
20 joining members,
100 fluorescent light emitting display (display device),
110, 210, 310, 410, 510 display unit,
111 phosphor fine particles (first luminous body),
112, 512 display film (display medium),
112a, 512a First display surface (display surface),
112b, 512b Second display surface (display surface),
112c, 512c first end face,
112d second end face,
211 covering member,
311 phosphor fine particles (second phosphor),
312 phosphor fine particles (third light emitter, fourth light emitter),
120, 320, 420, 520, 620, 720, 820 first light source unit,
121 a first light source;
122, 328, 426 first optical fiber,
123 first collimator lens,
124, 624, 724, 824 first prism (first introduction member),
124a, 624a, 724a, 824a incident surface,
124b, 624b, 724c, 824c exit surface,
724b, 824b reflecting surface,
724d, 824d reflective film,
125 wires,
221,322,324,422 optical fiber for light distribution,
321 third light source,
323 fifth light source,
325 multiplexer,
326,424 optical fiber for relay,
327 light distributor,
421 the eighth light source,
423 multiplexer,
425 light distributor,
526 first cylindrical lens;
526a incident surface,
526b exit surface,
130, 330, 430 second light source unit,
131 a second light source,
132, 338, 436 second optical fiber,
133 second collimator lens,
134 second prism (second introduction member),
134a incident surface,
134b exit surface,
135 wire,
331 fourth light source,
231 332 334 432 optical fiber for light distribution,
333 sixth light source,
335, 433 multiplexer,
336,434 optical fiber for relay,
337 light distributor,
431 Seventh light source,
435 Light distributor,
140 control unit (control member),
EL11 first excitation light (infrared light having a wavelength of 1550 nm),
EL12 second excitation light (infrared light having a wavelength of 850 nm),
EL21 third excitation light (infrared light having a wavelength of 1014 nm),
EL22 fourth excitation light (infrared light having a wavelength of 840 nm),
EL31 fifth excitation light (light with a wavelength of 800 nm, which is infrared light),
EL32 sixth excitation light (infrared light having a wavelength of 1120 nm),
EL42 seventh excitation light (infrared light having a wavelength of 1120 nm),
EL51 8th excitation light (infrared light having a wavelength of 800 nm),
RL1 first fluorescence (light of green wavelength that is visible light),
RL2 second fluorescence (light of red wavelength that is visible light),
RL3 3rd fluorescence (light of the blue wavelength which is visible light),
RL4 4th fluorescence (light of red wavelength which is visible light),
RL5 5th fluorescence (light of blue wavelength which is visible light),
B1 A portion of the first excitation light EL11 that is separated from the optical path K1 reflected and propagated inside the display film 112,
B2 A portion of the first excitation light EL11 that is separated from the optical path K2 from the first prism 124 to the display film 112,
K1 an optical path that reflects and propagates inside the display film 112 in the first excitation light EL11;
K2 an optical path from the first prism 124 to the display film 112 in the first excitation light EL11,
X propagation direction of the first excitation light EL11 and the like in the display film 112,
Y The propagation direction of the second excitation light EL12 and the like in the display film 112,
Z The thickness direction of the display film 112.

Claims (16)

When excited by a plurality of excitation lights including the first excitation light and the second excitation light, the phosphor that emits fluorescence having a wavelength shorter than that of the plurality of excitation lights is dispersed and held, and the fluorescence is displayed. A display medium having a display surface;
A first light source that emits the first excitation light;
A first introduction member for introducing the first excitation light into the display medium;
A second light source that emits the second excitation light;
A second introduction member that introduces the second excitation light into the display medium so as to intersect the first excitation light;
A control member for controlling the first light source and the second light source so as to intersect the first excitation light and the second excitation light at a specific position of the display medium,
At least the first introduction member is in contact with the display surface and introduces the first excitation light from the display surface to the display medium to propagate along the display surface.   The display according to claim 1, wherein the first introduction member includes an incident surface that extends so as to intersect with the display surface and propagates the first excitation light while refracting the first excitation light toward the display surface. apparatus.   The display device according to claim 2, wherein the incident surface is a convex cylindrical surface.   The first introduction member includes a reflection surface that extends so as to intersect the display surface and propagates the first excitation light while reflecting the first excitation light toward the display surface. The display device according to claim 1.   The display device according to claim 4, wherein the reflecting surface is a concave cylindrical surface.   The display device according to claim 1, further comprising a collimator lens between the first light source and the first introduction member.   The display device according to claim 1, further comprising a cylindrical lens between the first light source and the first introduction member.   The display device according to claim 1, wherein the first introduction member has the same refractive index as that of the display medium. The first excitation light propagates while reflecting inside the display medium,
The display device according to claim 1, wherein the first introduction member is in contact with the display surface in a portion separated from an optical path of the first excitation light that is reflected and propagated.   An optical path from the first introduction member to the display medium in the first excitation light and a distance from the optical path from the second introduction member to the display medium in the second excitation light. 10. The cover member according to claim 1, further comprising a covering member that is in contact with the display surface of the portion that has been formed and has a refractive index smaller than that of the display medium at wavelengths of the first excitation light and the second excitation light. The display device according to item. The display medium further disperses and holds one or more other light emitters that emit other fluorescence having a wavelength different from that of the fluorescence,
Fluorescence of light of red, green and blue wavelengths is emitted by the light emitter and one or more of the other light emitters,
And further comprising another light source that emits other excitation light that excites the light emitter or one or more of the other light emitters,
The display device according to claim 1, wherein the plurality of first introduction members or the plurality of second introduction members further introduce the other excitation light toward the display medium.   The display device according to claim 11, further comprising a multiplexer that multiplexes the fluorescence and the other fluorescence and causes the fluorescence to enter the first introduction member. A plurality of the first light sources;
A plurality of the second light sources are provided,
The display device according to claim 1, wherein the control member controls the specific first light source and the second light source corresponding to a specific position of the display medium.   The said 2nd introducing member contacts the said display surface, introduce | transduces said 2nd excitation light into the said display medium from the said display surface, and propagates along the said display surface. The display device described.   The display device according to claim 1, wherein the display medium is used by being attached to a windshield of a vehicle. Display that displays and displays the fluorescence by dispersing and holding phosphors that emit fluorescence having a shorter wavelength than the plurality of excitation lights when excited by a plurality of excitation lights including the first excitation light and the second excitation light. Information is displayed on the display surface of the display medium by propagating the first excitation light and the second excitation light so as to intersect each other at a specific position and generating the fluorescence. A display device control method for controlling
Display for controlling to display at least the first excitation light from the display surface to the display medium through the introduction member in contact with the display surface and propagate along the display surface. Control method of the device.