JP2004020881A - Light radiating mechanism using fluorescent body moving along guide means, display device using same, and light source unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light radiating mechanism of simple constitution which changes an optical path by using a fluorescent body moving along a guide means, a light display device which uses the same, and a light source unit. <P>SOLUTION: The light radiating mechanism has the fluorescent body 104 which is excited with incident light 105 to radiate light and changes its propagation direction, the guide means 103 which guides the fluorescent body 104, and a driving means 102 which moves the fluorescent body 104 in the extension direction of the guide means 103. The phosphor 104 and guide means 103 are so constituted that the light is directed to a nearly fixed direction to the extension direction at respective positions of the fluorescent body 104 in the guide means 103. In this constitution, the fluorescent body 104 is moved merely in parallel along the guide means 103 and the light emitted by the fluorescent body is only scanned, so the light radiating mechanism can flexibly be constituted with simple constitution. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a light emitting mechanism that changes an optical path using a phosphor that moves along guide means, a display device and a light source device using the same.
[0002]
[Prior art]
As a display device using a conventional light emitting element, an LED display that displays an image by arranging two light emitting elements corresponding to one pixel in a two-dimensional array and controlling each light emitting element, There is an EL display. For example, an LED display in which LEDs are used as light emitting elements and light emitting elements of three primary colors, red (red (R)), green (green (G)), and blue (blue (B)), are arranged in a matrix. Is disclosed in Japanese Patent Application Laid-Open No. 7-306659.
[0003]
On the other hand, there is known a laser display that displays an image by two-dimensionally scanning one (or three R, G, and B) lasers. As a laser display, for example, as described in Japanese Patent Application Laid-Open No. 2000-19769, R, G, and B laser beams of three primary colors are oscillated by a laser oscillator, and these output laser beams are screened. There is a projection display apparatus which projects a color image or the like on a screen by projecting onto the same point and two-dimensionally scanning it at a high speed.
[0004]
[Problems to be solved by the invention]
However, a display device in which light-emitting elements are two-dimensionally arranged for each pixel has problems such as an increase in power consumption due to a large number of light-emitting elements, and deterioration of image quality due to variations in light-emitting elements. There is. Furthermore, it becomes necessary to arrange electric wirings in a matrix and to arrange TFT transistors for each pixel, which complicates the configuration of the display unit.
[0005]
In addition, an LED display is particularly preferable in terms of high luminous efficiency and lifetime, but it is difficult to manufacture an element that emits different colors on the same substrate. Is limited to application to display devices. On the other hand, an organic EL display, which has recently attracted attention, can be applied to a small device, but is in a development stage due to its short lifetime.
[0006]
On the other hand, in a laser display in which an image is displayed by two-dimensionally scanning a small number of light-emitting elements of about one to three, the amount of light emitted from one light-emitting element is limited, so that the surrounding area is bright and external light is incident on the screen. In such a situation, there is a problem that an image is dark and visibility is low. In addition, a volume in the depth direction is required to install an optical system for laser scanning, and a thin display device is difficult. Further, there are problems such as the necessity of a mirror that swings at a high speed in order to scan the laser two-dimensionally at a high speed, and the fact that it is weak against vibration.
[0007]
Further, a head-mounted display as shown in FIG. 14 is disclosed in Japanese Patent Laid-Open No. 2000-1111827 as a display device in which LEDs are arranged in a line for each pixel row, unlike the above-described conventional device. However, it has a complicated mechanical configuration and is not practical.
[0008]
In view of the above problems, an object of the present invention is to provide a light emitting mechanism using a phosphor that moves along guide means, a device using the same, that is, a device that can display a bright image and has a relatively simple structure of a display unit. It is an object of the present invention to provide a display device and a light source device which can be easily manufactured with a thin structure.
[0009]
[Means for Solving the Problems]
The light emission mechanism that achieves the above object has a phosphor that is excited by incident light to emit light, guide means for guiding the phosphor, and driving means for moving the phosphor in the extension direction of the guide means. The phosphor and the guide means are configured such that incident light is emitted from each position of the phosphor in the guide means from a direction substantially constant with respect to the extending direction. In this configuration, since the phosphor is simply moved in parallel along the guide to scan the light emission position of the phosphor, the light emitting mechanism can be flexibly configured with a simple configuration.
[0010]
Based on the above basic configuration, the following more specific modes are possible.
A plurality of phosphors are provided, and one guide means is provided for each phosphor. The plurality of guide means extend in parallel with each other and are configured as shown in FIG. As shown in the drawing, a plurality of phosphors are configured to travel or guide along the direction of extension of the guide means, and a plurality of phosphors are configured to move along the respective guide means while maintaining a predetermined relative relationship as shown in FIG. Or
[0011]
Further, as shown in FIG. 7C, a phosphor excited by the incident light, a guide means for guiding the phosphor, a light emitting position excited by the incident light to emit light, and a retreat position not excited by the incident light. And a driving means for moving the phosphor in the direction in which the guide means extends between the driving means and the driving means. In this case, a plurality of phosphors are provided, one guide means is provided for each phosphor, and the plurality of guide means extend in the propagation direction of the incident light in a non-parallel to the propagation direction and are parallel to each other. 7C, or a configuration in which a plurality of guide means are two-dimensionally arranged.
[0012]
Further, as described in the embodiments and examples described below, the movement direction of the phosphor is limited to one direction by the guide means, and the phosphor moves in the transparent medium, and the movement of the phosphor is caused by the fluid in the guide means. Or the phosphor is made of a magnetic material, and controls the movement of the phosphor by controlling the magnetic field acting on the phosphor, and the refractive index of the transparent medium is controlled by the guide means. An effective optical waveguide can be formed as a configuration having a refractive index larger than the refractive index. Further, the guide means can be configured to be bendable, and the guide means and the transparent medium can be formed of a material transparent to visible light.
[0013]
In addition, a scatterer that scatters incident light and changes its propagation direction is provided together with the phosphor, and one guide is provided for the scatterer, and the plurality of guides of the phosphor and the scatterer are mutually connected. It can be made to extend in parallel. Alternatively, a scatterer that scatters incident light and changes its propagation direction is provided together with the phosphor, and a guide unit is also provided for the scatterer, and a scattering position where incident light can be scattered and a retracting position where incident light cannot be scattered. And a driving means for moving the scatterer along the extension direction of the guide means between the guide means and the scatterer. The scatterer can be provided with the above-described guide means for the phosphor. In a display device using such a light emission mechanism, for example, blue is used as incident light, blue pixels use scattering from a scatterer such as a mirror, and green and red pixels use blue incident light to emit green and red fluorescent light. There may be an embodiment in which the body is excited and fluoresced.
[0014]
In addition, a display device that achieves the above object has a light emitting element such as the above-described light emitting mechanism and a laser diode, and propagating light from the light emitting element emits light in the extending direction at each position of a phosphor or a scatterer in the guide means. And a guide means are configured so that light is emitted from a substantially constant direction, and display is performed using light emitted from the fluorescent material or light scattered by the scatterer. It is characterized by the following. Alternatively, the light-emitting device includes the light-emitting mechanism and the light-emitting element described above, and is configured to perform display with light emitted from a phosphor or light scattered by a scatterer.
[0015]
In such a display device, for example, even when a plurality of light emitting elements of a single type are used, color display using various colors can be performed by using different types of phosphors. In this case, since the light source is a single type of light source, the driving circuit is easy, and the color can be designed with the phosphor, so that it is not necessary to set the color with the light source. Although there are not many types of light sources such as lasers and LEDs, the range of color design is widened because a great number of types of phosphors have been developed. Furthermore, visibility is good because mainly display using fluorescence from a phosphor (which has a relatively wide spectrum wavelength band) instead of reflected light from a laser is used.
[0016]
The following embodiments are also possible. Modulating means for modulating the amount of light emitted from the light emitting element, and detecting means for detecting the position of the phosphor or scatterer in the guide means, based on the position of the phosphor or scatterer in the guide means, and the display information signal The modulation means is controlled so that the display is performed by the light emitted from the phosphor or the light scattered by the scatterer (see FIGS. 7A and 7B). Modulating means for modulating the amount of light emitted is further provided, and the position of the phosphor or scatterer in the guide means, and the modulating means is controlled based on the display information signal, and the light or scatterer emitted by the phosphor is used. In some cases, display is performed with scattered light (see FIG. 7C).
[0017]
Also in the display device, the guide means is configured to be bendable so that the display area is bendable, or the guide means and the transparent medium are formed of a material transparent to visible light so that the display area is outside. It can be a see-through display that is transparent to light. Also, as shown in FIG. 8, a plurality of two-dimensionally arranged light emitting elements, and a plurality of phosphors or scatterers which emit light when excited by the two-dimensionally arranged light fluxes emitted from the light emitting elements. In addition, the stereoscopic display device can be configured to include a modulator that modulates the amount of light emitted from the plurality of light emitting elements, and a driver that moves the phosphor or the scatterer in a direction perpendicular to the plane in which the light beams are arranged.
[0018]
Further, as shown in FIG. 9, a control unit having a plurality of light emitting elements and a modulating means for modulating the plurality of light emitting elements, an optical guide cable for transmitting light from the plurality of light emitting elements, and a light guide from the control unit. A display unit that forms an image using a plurality of light beams transmitted through the cable; the display unit arranges the light beams transmitted through the light guide cable, and a transparent medium and light beams that propagate in a display surface direction. It is also possible to adopt a configuration having a fluorescent material that emits light when excited by a flux or a scatterer that scatters a light flux.
[0019]
In addition, a light source device that achieves the above object has a light emitting element such as the light emitting mechanism and a laser diode described above, and the propagating light from the light emitting element extends in each direction of the phosphor or scatterer in the guide means in the extending direction. That the phosphor or the scatterer and the guide means are configured so as to be irradiated from a substantially constant direction, and that the light is emitted by the light emitted from the phosphor or the light scattered by the scatterer. Features. Alternatively, the light-emitting device includes the light-emitting mechanism and the light-emitting element described above, and is configured to irradiate with light emitted from a phosphor or light scattered by a scatterer.
[0020]
Since the light source device does not need to display an image, the light source device has a simpler configuration than the display device. The light source device can also adopt various forms basically similar to the various forms of the display device described above.
[0021]
[Action]
In the light emission mechanism of the present invention, the fluorescent material is simply moved in parallel along the guide to scan the fluorescent position. The display device and the light source device of the present invention utilize such a light emitting mechanism.
[0022]
The operation of the present invention will be described in detail with reference to specific examples of the display device of the present invention. Here, the description will be made only of the phosphor, but the case where a scatterer is included is substantially the same. In the display device, for example, a plurality of light beams emitted from a plurality of light emitting elements are arranged and propagated in a line, and a phosphor arranged corresponding to each light beam is excited and emitted to observe light. Radiation in the direction of the person (display direction). Further, an image is displayed by moving each of the phosphors at a high speed in a direction (for example, a vertical direction) non-parallel to the arrangement direction of the light beams and modulating each of the light emitting elements. By observing the light emitted from the phosphor moving at high speed, the observer recognizes the image as a two-dimensional image due to the effect of the afterimage.
[0023]
In the display device of the present invention, the number of light-emitting elements used is the number of pixel rows (or the number of pixel columns) on the screen. The number of elements is small. Thus, power consumption can be reduced, and it is easy to cope with a decrease in image quality due to variations in light emitting elements. Further, there is no need for a matrix electric wiring or a TFT transistor for each pixel, and the structure of the display section is simple. Since the configuration is simple, it can be manufactured at low cost.
[0024]
On the other hand, compared with a laser display that two-dimensionally scans about one to three light-emitting elements (lasers), a sufficiently bright image can be displayed because the number of light-emitting elements used is large. In addition, since the amount of light output from one light emitting element can be reduced, the load on the light emitting element and the driving circuit is reduced. Further, there are advantages that the scanning optical system is thin and can be made very small, and it is strong against vibration.
[0025]
In addition, the display device of the present invention has advantages such as a thin optical system which can be made very small, and a high resistance to vibration, as compared with a head mounted display as shown in FIG. Furthermore, in the display device of the present invention, particularly, by arranging the phosphor for each light emitting element, the high-speed movement of the phosphor can be made easy and reliable. In particular, the use of a minute (light) spherical phosphor enables effective high-speed operation with a simple configuration.
[0026]
Further, in the display section of the display device of the present invention, only the fine phosphor moves at high speed. If the means for moving the phosphor at high speed can be provided outside the display unit, the display unit does not require electrical wiring. This configuration has a great advantage in terms of improving the aperture ratio (usually, the area of the light emitting portion in the display portion is limited by the area of the electric wiring and the transistor), and also in terms of structural simplicity.
[0027]
Although the light source device of the present invention does not require a light emitting element modulation means, it has an operation and an advantage similar to those of the above-described display device.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the device including the light emitting mechanism of the present invention will be described in detail below.
[0029]
FIG. 1 is a schematic perspective view illustrating an example of the display device of the present invention. In FIG. 1, reference numeral 101 denotes a light emitting element, 102 denotes a transparent medium, 103 denotes a support guide serving as guide means, 104 denotes a phosphor, and 105 denotes a light beam from the light emitting element 101. A plurality of light emitting elements 101 are arranged corresponding to the pixel rows (or pixel columns) of the screen (formed on the upper surface of the support guide 103). For example, as shown in FIG. 1, they are arranged in a row (in the x direction in FIG. 1) at the end of the display surface or screen. That is, m (or n) light emitting elements 101 are arranged on an m × n screen (m and n are both positive integers).
[0030]
A plurality of light beams 105 emitted from the light emitting element are arranged in parallel in a line along a propagation path formed by the transparent medium 102 and the support guide 103, propagate in the y direction, and correspond to the respective light beams 105. The phosphor 104 arranged in this manner is excited and emits light to emit light in the direction of the observer (z direction).
[0031]
The phosphors 104 are arranged corresponding to the respective light beams 105, and move (move) at high speed in the y direction in FIG. The phosphor 104 is periodically moved at a frame frequency, for example. Accordingly, the light beam 105 is irradiated on the phosphor at various y positions within the range in which the phosphor 104 moves. In such a configuration, the (Px, Py) position is modulated by modulating the light emitting element 101 that outputs the propagating light beam 105 to the Px-th row in accordance with the position Py of y during the movement of the phosphor 104 in the Px-th row. The display is performed by setting the amount of light to be irradiated. For example, an m × n image can be obtained by dividing the y position Py of each phosphor 104 into n positions and modulating the intensity of each light emitting element 101 according to each position. That is, the excitation / emission position of the phosphor 104 is scanned at high speed by the parallel movement of each phosphor 104, and each light emitting element 101 is modulated based on the image information data according to the movement of the phosphor. Thus, the observer recognizes the image as a two-dimensional image due to the effect of the afterimage. In this manner, by using the movement of the phosphor 104, a two-dimensional image is formed from the light beams 105 arranged in a line in the x direction.
[0032]
Next, each part will be described in detail.
First, the configuration of the display panel will be described. As the light emitting element 101 used for exciting the phosphor 104, any light emitting element that emits light capable of exciting the phosphor 104 can be used. When the phosphor 104 that emits visible light is used, a light-emitting element that emits ultraviolet light or blue light is preferable, and a laser diode (LD), an LED, an organic LED, an ultraviolet light source using plasma, or the like can be used. Depending on the type of the phosphor 104 and the configuration of the display device, for example, an InGaN-based ultraviolet or blue LD or LED can be used. Among them, an LD having high luminous efficiency and high directivity is preferable. As the excitation light, it is common to use light having a shorter wavelength (having larger energy) than fluorescence. However, light having a longer wavelength than fluorescence can be used as excitation light by multiphoton absorption.
If necessary, the color of the display light can be adjusted by attaching a filter corresponding to each part on the display panel.
[0033]
The phosphor 104 is excited by a light beam 105 propagating in the light propagation path in the y direction, and emits light. Although a phosphor 104 having a spherical shape, an elliptical spherical shape, a truncated cone shape, or the like can be used, it is particularly preferable to use a spherical phosphor 104 because it is easy to move when moving at high speed. Spherical phosphors are also advantageous in that they are excellent in productivity, that they are easy to install because their shapes are not directional. Examples of the spherical phosphor include a fluorescent sphere in which the fluorescent particles or the material 201 are solidified (FIG. 2A) or an arbitrary material (the glass or resin 202, the magnetic material 203, or the like) of the fluorescent particles or the material 201. Coated spheres (FIGS. 2 (b) and (c)) can be mentioned. The use of a sphere in which the fluorescent particles 201 are coated on a resin is preferable because the weight of the phosphor 104 is reduced and the phosphor 104 can be easily moved at high speed. Alternatively, a phosphor capsule in which the fluorescent material 201 is sealed in a transparent resin capsule 204 as shown in FIG. 2D can be used. Such a fluorescent material coat or capsule form can be applied to the phosphor 104 having a shape other than the spherical shape.
[0034]
Here, the fluorescent material may be any material that emits light in the visible region, such as dyes, pigments, dyes having fluorescent characteristics, fluorescent materials used in cathode ray tubes and plasma displays (PDP), semiconductor materials, organic light emitting materials, and the like. Can be used. Examples of the dye include dyes such as rhodamine and coumarin. In addition, aluminum complexes (Alq ₃ ) Or polyparaphenylene vinylene (PPV) which is a polymer light emitting material.
[0035]
Examples of the inorganic fluorescent material include general fluorescent materials such as ZnS: Mn, ZnS: Ag, ZnS: Cu, and Al. In addition, red Zn which is a fluorescent material for CRT is used. ₃ (PO ₄ ) ₂ : Mn ²⁺ , (Zn, Cd) S: Ag, YVO ₄ : Eu ³⁺ , Y ₂ O ₃ : Eu ³⁺ , Y ₂ O ₂ S: Eu ³⁺ , Green Y ₃ Al ₅ O ₁₂ : Tb ³⁺ , Blue ZnS: Ag or (La, Y) OBr: Ce ³⁺ , (La, Gd) OBr: Ce ³⁺ Etc. can be used. Further, ZnO: Zn, SnO used for a light emitting display panel excited by a low-voltage electron beam of 10 to 100 V is used. ₂ : Eu ³⁺ , Y ₂ O ₃ : Eu ³⁺ + In ₂ O ₃ And the like. Furthermore, BaMgAl used in PDPs ₁₄ O ₂₃ : Eu, Zn ₂ SiO ₄ : Mn, (Y, Gd) Bo ₃ : Eu or the like may be used.
[0036]
As a semiconductor applicable to the fluorescent material, a direct transition semiconductor is desirable, and a II-VI group compound semiconductor such as ZnO, ZnS, or CdS; a IIIb-V group compound semiconductor such as AlAs or GaP; or a III-VI compound semiconductor such as GaN or AlN. A group V compound semiconductor, a chalcogenide compound such as MgS or MnS, or a mixed crystal thereof is exemplified. Further, an organic semiconductor such as pentacene or tetracene can be used.
[0037]
When the fluorescent material 104 is moved by using a magnetic force, a magnetic material can be mixed, or a magnetic material 203 coated with a fluorescent material 201 as shown in FIG. 2C can be used. For example, a steel ball may be used as a core and covered with a fluorescent material. In addition, a material such as a neodymium magnet, a samarium magnet, an alnico magnet, or a ferrite may be used. Of course, a glass ball or a resin ball may be coated with a magnetic substance such as nickel, and further coated with a fluorescent material. Further, in order to reduce scratches on the phosphor surface or reduce friction, the phosphor 104 may be appropriately coated with a surface.
[0038]
The support guide 103 limits the movement direction of the phosphor 104. This is preferable because the movement of the phosphor 104 can be controlled with high accuracy. As the support guide 103, a transparent glass or a resin material is used. In particular, by forming the support guide 103 with a bendable material such as a resin sheet or a tube, a display device (flexible display device) with a bendable display unit can be obtained.
[0039]
FIG. 1 shows an example in which each phosphor 104 is moved only in the y direction by a support guide 103. As a structure of the support guide 103, as shown in FIG. 3 showing an xz cross section of FIG. 1, a rectangular groove (FIGS. 3A and 3B), a V groove (FIG. 3C), and a circular groove ( 3D) and a cylinder (FIG. 3E) can be used. A capillary or the like can be applied to the cylinder, that is, the tube, and has good applicability to the spherical phosphor, and is thus preferable. At the end of the support guide 103, a stopper or a reaction absorbing material for stopping the movement of the phosphor 104, a spring material for repelling the phosphor 104, or the like may be provided.
[0040]
The first role of the support guide 103 is to guide the movement of the phosphor 104, and it is preferable to use a member having a smooth surface so that the movement of the phosphor 104 can be controlled with good control. Further, the support guide 103 can also have a role of guiding the light beam 105, that is, a role of propagating light to itself or guiding light propagation. That is, the transparent medium 102 and the support guide 103 may have the function of an optical waveguide. At this time, it is preferable to use a material having a smooth surface for the support guide 130 so that light scattering hardly occurs at the interface between the support guide and the transparent medium.
[0041]
Further, it is preferable that the difference in the refractive index between the support guide 103 and the transparent medium 102 is small so that interface scattering is hard to occur. This can suppress the reflection of external light and provide a display device with excellent image visibility. That is, transparency is enhanced when used as a see-through display, which is particularly preferable.
[0042]
For the transparent medium 102, vacuum, air, dry air, inert gas, transparent liquid such as silicone oil, water, glycerin, or the like is used. When vacuum, air, gas, or the like is used for the transparent medium 102, the refractive index is small. Therefore, it is preferable that the support guide 103 is also made of a material having a small refractive index. For example, a fluorine resin is used. When a transparent liquid such as silicone oil is used for the transparent medium 102, a display device having excellent visibility can be obtained by using a material having a refractive index close to that of the transparent liquid for the support guide 102.
[0043]
Further, by setting the refractive index of the support guide 103 to be slightly smaller than the refractive index of the transparent medium 102, an optical waveguide in which the transparent medium is a core and the support guide is a clad can be formed. Thereby, the light from the light emitting element 101 is effectively propagated along the transparent medium 102, and the light is effectively guided to the phosphor 104, which is more preferable. When the guide of each light beam 105 is insufficient and there is a possibility that the image quality may be degraded due to the exchange of light between the light beams 105, a black color is provided between each light propagation path (between each guide). May be arranged.
[0044]
These components are components of the display device, and the above-described configuration may be provided on an arbitrary substrate or may be provided in an outer container as appropriate.
[0045]
Next, the movement of the phosphor 104 will be described. This description is the same for the scatterer.
The phosphor 104 moves in a direction non-parallel to the direction in which the plurality of light beams 105 are arranged. FIG. 1 shows an example in which the phosphor 104 is moved in the y direction with respect to the light beam 105 arranged in the x direction. For example, if the phosphor 104 is reciprocated at 10 Hz, an image with a frame frequency of 20 Hz can be displayed by using the back and forth. The phosphor 104 preferably moves at a constant speed as much as possible. However, even if the phosphor 104 has an acceleration, a desired image can be formed by modulating the light emitting element 101 accordingly if the position and the speed can be controlled. .
[0046]
As a driving unit of the phosphor 104, any actuator unit can be applied. For example, a method of moving the phosphor 104 using a flow of gas, liquid, or the like, a method of moving the phosphor 104 having a magnetic material by a magnetic force remotely, and an ultrasonic motor provided along the guide means 103 And a method of moving the phosphor 104 in a peristaltic manner using a piezoelectric element provided along the guide means 103.
[0047]
FIG. 4A shows an example in which the magnetic phosphor 401 is remotely operated by the magnet 403 arranged on the back side of the display unit. Here, the magnet 403 is installed on the linear motor 402, and the linear motor 402 is controlled by a drive circuit to cause the magnet 403 to perform a desired operation. Then, the fluorescent material 401 is moved to follow the magnet 403 by the magnetic force generated from the magnet 403.
[0048]
Also, as shown in FIG. 4B, a plurality of electrodes 404 (coils) for generating a magnetic field are arranged on the back side of the display unit, and the current is applied to these electrodes 404 at appropriate timing as shown in FIG. , The magnetic phosphor 401 can be moved even if the magnetic field generated by this current is scanned.
[0049]
FIG. 5 is an example in which the phosphor 104 is moved using the flow of a transparent medium that is a fluid. The flow of the liquid or gas is controlled by the electromagnetic valves 501A and 501B at both ends of the guide means, and the flow is controlled so as to reciprocate, whereby the phosphor 104 can be moved. As shown in FIG. 5A, a high-pressure unit 503 and a low-pressure unit 502 are provided for the solenoid valves 501A and 501B at both ends, respectively, and the connection to each is sequentially switched as shown in FIG. As shown in FIG. 5C, one pressure control unit 504 and one fluid reservoir 505 are provided at both ends of the guide means as shown in FIG. 5C, and the positive pressure and the negative pressure are repeated as shown in FIG. 5D. There is a method of changing the position of the phosphor by repeating the suction and pressing of the phosphor 104 by making. For the pressure control unit, a device capable of controlling the pressure, such as a pump, is used.
[0050]
Further, by sensing the position of the phosphor 104, feedback, that is, servo control may be performed to more accurately control the position of the phosphor. Specifically, a sensor for detecting the position of the phosphor is arranged in a part of the display device, and the position information from the sensor is obtained. The sensor may be arranged on the entire surface of the phosphor movable area, or the sensor may be arranged on a part of the display unit, for example, at an end. As a detection method, optical sensing can be mentioned, and a so-called reflection (or transmission) photoelectric sensor can be applied.
[0051]
The phosphor 104 of the display device may be used as a light source for a position detection sensor. For example, a part of light emitted from the phosphor 104 (light in the −z direction) is monitored by a light receiving element arranged on the back side of the display unit. An area not used for display may be provided at a part of the movable area of the phosphor, for example, at the end, and a light receiving element may be provided near this area to be used as a phosphor position monitor.
[0052]
Further, as shown in FIG. 7B described later, a plurality of light beams can be guided to one phosphor, and the light beam emitted or scattered by the phosphor can be used as a light source for position monitoring. In FIG. 7B, the light emitting elements 101 are arranged on both the left and right sides of the display unit, and the light beams from both sides are guided to the phosphor 104. In this case, the light beams from one side are used for display, and One beam is used for position monitoring. Needless to say, another light emitting element for detecting the position of the phosphor may be prepared separately from the light emitting element used for display. At this time, a light source for position monitoring may use invisible light such as infrared light. Invisible light is preferable because it does not interfere with display. The wavelength of the monitor light source is not particularly limited, but there is an advantage that using a long wavelength light source (for example, an infrared light source) requires less power consumption.
[0053]
This position sensing information can be used for controlling the light emitting element in addition to controlling the movement of the phosphor as described later.
[0054]
Next, an example of an electrical configuration (electric circuit portion) of the display device will be described.
FIG. 6 is a diagram illustrating an example of an electric circuit for performing display according to an image signal (such as an NTSC signal or a video signal). In FIG. 6, reference numeral 601 denotes an image display panel, 602 denotes a light emitting element driving circuit, 603 denotes a control circuit, 604 denotes an image input unit, 605 denotes a phosphor driving circuit, and 606 denotes a phosphor position sensor.
[0055]
The image input unit 604 is a circuit that outputs image data (such as a video signal) to the control circuit 603 in a desired format under the control of the control circuit 603. For example, the image input unit 604 stores image data in a frame memory in a frame unit, and stores pixel data for one column of the stored frame image in a register in accordance with an address signal input from the control circuit 604. Output. Further, the register holds pixel data for one vertical column, and outputs the pixel data for one vertical column to the control circuit 604 under the control of the control circuit 604.
[0056]
The light-emitting element driving circuit 602 is connected to the light-emitting element 101, and can perform arbitrary modulation of the light-emitting element 101 under the control of the control circuit 603. As a method for modulating the light emitting element 101, a current modulation method, a voltage modulation method, a pulse width modulation method, or the like can be employed. When implementing the voltage (current) modulation method, a circuit that generates a constant voltage (current) determined according to input data and appropriately modulates the output is used. When implementing the pulse width modulation method, a circuit of a pulse width modulation method that generates a voltage pulse having a constant peak value and appropriately modulates the width of the voltage pulse according to input data is used. Of course, the peak value of the pulse may be controlled, or a modulation method for controlling both the voltage and the pulse width may be used.
[0057]
The phosphor driving circuit 605 is a circuit that controls the movement of the phosphor 104. This circuit 605 depends on the driving method of the phosphor 104, but includes a coil driving circuit in the case of electromagnetic driving (such as a linear motor), and an electromagnetic valve or pressure controller for fluid control in the case of driving with a fluid. Is a circuit that performs the control.
[0058]
The control circuit 603 has a function of matching the operation of each unit so that appropriate display is performed based on the image signal. The control circuit 603 controls the operation of each unit so that the pixel array light, which is one-dimensionally displayed by the light emitting element 101, excites and emits the phosphor 104 that is moved at a high speed, so that it looks like a two-dimensional image. . Further, the control circuit 603 generates each control signal to each unit, that is, the light emitting element driving circuit 602 and the phosphor driving circuit 605, based on the synchronization signal separated from the image signal and the clock signal generated by itself. I do.
[0059]
Further, the control circuit 603 outputs a modulation signal to the light emitting element driving circuit 602 based on the position Py and the moving speed Vy of the phosphor 104 from the phosphor position sensor 606 in addition to the image information from the image input unit 604. . The relationship between the position and speed of the phosphor 104 and the modulation to the light emitting element 101 (how to output an image input in view of the position and speed) is stored in advance in the control circuit 603 as table data. It is preferable to keep it. That is, the control circuit 603 sets and modulates the driving conditions of the light emitting element 101 based on the table data and the image data.
[0060]
For example, when the phosphor 104 moves at a constant speed, the light beam 105 is output to the line Px when the phosphor 104 is at the position Py based on the pixel data corresponding to the position (Px, Py). The light emitting element 101 may be modulated so as to output a light amount corresponding to the pixel information. On the other hand, when the phosphor 104 moves at a non-constant speed, the speed is high in consideration of the fact that the display time (time during which the phosphor 104 emits a light beam at the pixel) is short in the pixel portion with high speed. By the way, a method of increasing the light amount of the light beam is required. For example, a value obtained by multiplying the pixel data corresponding to the position (Px, Py) by a weight proportional to Vy is output to the light emitting element driving circuit 602, thereby modulating the light emitting element 101 that outputs the light beam 105 to the Px row. .
[0061]
Further, the control circuit 603 may control the light emitting element drive circuit 602 and the phosphor drive circuit 605 based on the phosphor position detection signal input from the position detection sensor 606. As described above, the controllability of the movement of the phosphor 104 can be improved by feeding back the phosphor position detection signal to the phosphor driving. Further, the phosphor position detection signal can be fed back to drive the light emitting element 101, that is, output of image display information. That is, based on the information on the detection position of the phosphor position detection sensor 606, when the phosphor 104 is at the Py position, the image information light corresponding to the position (Px, Py) is generated at a more accurate timing. It can be controlled so as to be output from the light emitting element 101 that outputs the light beam 105 of the row. If the speed of the phosphor 104 is not constant, as described above, the position Py and the speed Vy are stored in the control circuit 603 as a timing table, and the driving conditions of the light emitting element 101 are set in view of this. It may be. That is, the control circuit 603 can drive and control the light-emitting element 101 in an appropriate form in consideration of the signal input from the position detection sensor 606 and the stored table data.
[0062]
In this manner, according to the present embodiment, the one-dimensionally arranged light beam 105 from the plurality of light emitting elements 101 reciprocates along the support guide 103 at a high speed (for example, a frame frequency of 30 Hz). By irradiating the fluorescent substance 104 to be observed, it becomes possible to display a two-dimensional image using the influence of the afterimage at the viewpoint of the observer.
[0063]
Next, variations of the display device of the present embodiment will be described with reference to FIGS.
FIG. 7A shows a xy cross section of the display device of FIG. As described above, this is an example in which the light beam 105 that is arranged in the x direction and propagates in the y direction is displayed in the display direction (z direction) by the phosphor 104 that moves in the ± y directions.
[0064]
FIG. 7A shows an example in which one phosphor 104 is arranged for one light emitting element 101, but a plurality of phosphors may be used for one light emitting element, or a plurality of phosphors may be used for one light emitting element. A single phosphor may be provided for the light emitting element.
[0065]
In the latter case, as shown in FIG. 7B, there is an example in which one phosphor 104 is irradiated with a light beam 105 from two directions of two light emitting elements 101 and 101b. That is, as shown in FIG. 7B, the light emitting elements 101 and 101b may be arranged at both ends of the support guide 103, and the light beam 105 from both sides may be irradiated on one phosphor 104. In this case, one phosphor 104, that is, light from two light emitting elements can be irradiated at one pixel position, so that a brighter display device can be obtained.
[0066]
In FIG. 7B, the phosphor 104 has an elliptical spherical shape. Of course, other shapes including a spherical shape may be used.
[0067]
Further, in the configuration of FIG. 7A, the phosphor 104 is moved in the display surface direction, that is, in the y direction. However, in the example shown in FIG. 7C, the phosphor 104 is moved in the vertical direction (z Direction). In this configuration, one phosphor 104 is arranged for each pixel, and the phosphor 104 is moved up and down in the z direction. The upper position is a position where the phosphor 104 is irradiated on the light path of the light beam 105, and the lower position is a position retracted from the light path of the light beam 105. In FIG. 7C, the ON pixel at which the phosphor 104 is located at the upper position is sequentially shifted in the y direction, so that the light beam 105 at each x position excites the phosphor 104 so that the y position is y. Scanning in the direction, pixel information at arbitrary x and y positions can be displayed. In FIG. 7C, the phosphor 104 has a truncated cone shape, but may have another shape such as a spherical shape.
[0068]
Also in the example shown in FIG. 7C, any actuator means can be applied as a driving means of the phosphor 104, a method of moving the phosphor 104 using a flow of gas, liquid, or the like, And a method of moving the phosphor 104 remotely using a magnetic force, a method of moving the phosphor 104 using an ultrasonic motor or a piezoelectric element, or the like. The electric circuit portion of the display device shown in FIG. 7C can basically use the one shown in FIG. However, since the control circuit 603 knows which phosphor 104 is at a position to be irradiated on the optical path, the phosphor position sensor 606 is not required.
[0069]
By the way, in the configuration of FIG. 1, the light emitting element 101 is arranged at the end of the display unit. However, as shown in FIG. 9, a control unit which arranges the light emitting element 101, the light emitting element driving circuit, the phosphor driving circuit, and the like. 902 and a display unit 901 in which the phosphor 104 is disposed, and a light guide cable 903 formed from a plurality of light guides is used to guide the light beams from the respective light emitting elements 101 to the display unit 901. A configuration is also possible. In the configuration of FIG. 9, a fluid drive line 904 for connecting a fluid for driving the phosphor 104 to the display unit 901 is also provided between the control unit 902 and the display unit 901. The display unit 901 having such a configuration is characterized in that the fine phosphor 104 only moves at high speed along the support guide, and the display unit 901 does not require electrical wiring.
[0070]
Further, in the display device of the above-described embodiment, the screen portion can be configured only by the transparent material and the minute phosphor 104, so that the display portion can be transparent. That is, a see-through display can be realized. By configuring the support guide 103 with a bendable one, a display device having a flexible display unit, that is, a flexible display can also be provided.
[0071]
Furthermore, a three-dimensional display can be obtained by arranging a plurality of the above-described transparent display units in an overlapping manner. For example, as shown in FIG. At this time, the light emitting elements 101 are two-dimensionally arranged on the xz plane, and the two-dimensionally arranged light beam 105 emitted from the light emitting element 101 propagates in the y direction to excite each phosphor 104 and display in the z direction. Will do. Since the amount of light excited at the positions Px, Py, and Pz by the phosphor 104 can be set, a three-dimensional display is possible.
[0072]
The display device is used as various display devices such as a display device of a television broadcast, a display of a computer or a mobile phone, and a head-mounted display.
[0073]
Next, an embodiment in which the light emitting mechanism of the present invention is applied to a light source device will be described.
Drawings such as FIG. 7 are also schematic cross-sectional views illustrating some examples of the planar light source of the present invention. The parts visible in the drawings such as FIG. 7 are the same for the display device and the light source device. In FIG. 7, 101 (101b) is a light emitting element, 102 is a transparent medium, 103 is a support guide, 104 is a phosphor, and 105 is a light beam. The configuration of the light source is in accordance with the above-described display device. A plurality of light beams 105 emitted from a plurality of light emitting elements 101 are arranged in a line along a propagation path formed by a transparent medium 102 and a support guide 103. The light propagates in the y direction, and light is emitted in the z direction by the phosphors 104 arranged corresponding to the respective light beams 105. Thus, the light from the light emitting elements 101 arranged in a line is scanned to form a planar light source. In the light source, the light emitting element does not need to be modulated, the image input unit 604 and the phosphor position sensor 606 in FIG. 6 can be omitted, and the control circuit 603 can be much simpler than that of the display device.
[0074]
In the light sources shown in FIGS. 7A and 7B, the light emitting element 101, a plurality of phosphors 104 that emit light when excited by the light beam 105 emitted from the light emitting element 101, and guide means for guiding the phosphor 104. And a driving unit (phosphor driving circuit 605 in FIG. 6) for moving the phosphor 104 along the direction in which the support guide 103 extends (here, the y direction). The light beam 105 is configured to excite the phosphor at each position of the phosphor 104 in the guide means 103 and emit light in a substantially constant direction with respect to the elongation direction (here, the y direction). The object to be irradiated is irradiated with the light emitted in 104.
[0075]
FIG. 7A shows an example in which one light emitting element 104 is arranged at one end of the support guide 103 for one phosphor 104, and FIG. In this example, two light emitting elements 101 and 101b are arranged at both ends of a support guide 103.
[0076]
FIG. 7C shows a light emitting element 101, a plurality of phosphors 104 which emit light when excited by a light beam 105 emitted from the light emitting element 101, and a support guide 103 which is a guide means for guiding each phosphor 104. Driving means for moving each phosphor 104 along the guide means (here, the z direction) between a light emitting position excited by the light beam 105 to emit light and a retracted position not excited by the light beam 105 (FIG. 6) A phosphor driving circuit 605) is provided to irradiate an irradiation target with light emitted from the plurality of phosphors 104.
[0077]
An ultraviolet light source or the like is used for the light emitting element 101, and a laser diode (LD), an LED, an organic LED, plasma, or the like can be used. Depending on the configuration of the light source device, an LD having high luminous efficiency and high directivity is preferable among them.
[0078]
As shown in FIG. 9 in the display device, a control unit 902 including a light emitting element 101, a light emitting element driving circuit, a phosphor driving circuit, and the like, and a unit 901 including a phosphor 104 (light emission in the light source). Surface) are separately arranged, and a light guide cable 903 formed of a plurality of light guides is used to guide light beams from the respective light emitting elements 101 to the light emitting surface units.
[0079]
Further, in the above-described planar light source, the light emitting surface portion can be made of only the transparent material and the minute phosphor 104 for changing the optical path, so that the light emitting surface portion can be made transparent. That is, a see-through light source can be realized. Further, the light source described above can be a light source having a flexible light emitting surface, that is, a flexible planar light source, by forming the support guide 103 with a bendable one.
[0080]
Further, by arranging a plurality of the transparent light sources described above, a light source with high luminance can be obtained. In addition, a white light source can be obtained by arranging phosphors that emit R, G, and B fluorescence in an overlapping manner.
[0081]
The present light source can be used as various light sources such as a backlight for a liquid crystal display device, a facsimile, and a light source for a copying machine, in addition to a lamp or a fluorescent lamp.
[0082]
The above-described various embodiments are merely examples of the configuration of the light emitting mechanism, the display device, and the light source device according to the present invention, and the application of each device obtained by the present invention is not limited thereto. For example, a part related to a function unnecessary for the purpose of use may be omitted from the constituent elements. Conversely, additional components may be added depending on the purpose of use.
[0083]
【Example】
Hereinafter, the present invention will be described with more specific examples. However, the present invention is not limited to the embodiments described below, and its configuration, manufacturing method, and the like are not limited as long as it is included in the broad concept described above.
[0084]
"Example 1"
This embodiment is an example in which a 20 × 20 display device having the configuration shown in FIG. 1 is realized. The light beams 105 emitted from the light emitting elements 101 arranged in the x direction are arranged in a line along the propagation path formed by the transparent medium 102 and the support guide 103 and propagate in the y direction. The correspondingly arranged phosphors 104 are excited and emit light. As a result, light is emitted in the direction of the observer (z direction). The control circuit modulates each light emitting element 101 based on the image information data according to the movement of each phosphor 104 in the y direction. Thus, the observer in the z direction recognizes the image as a two-dimensional image due to the effect of the afterimage.
[0085]
In this embodiment, an InGaN-based violet laser diode having an emission wavelength of 401 nm and an output of 3 mW was used as the light emitting element 101. The violet laser is an LD array formed by arranging 20 lasers at a pitch of 1.5 mm.
[0086]
As the support guide 103, a polycarbonate (refractive index: 1.59) plate processed into a desired shape by resin molding was used. The size of the plate is 5 cm square, and 20 rectangular grooves each having a width of 1 mm, a depth of 1 mm, and a length of 40 mm as shown in FIG. 3A are formed at a pitch of 1.5 mm.
[0087]
As the phosphor 104, a steel ball having a 0.8 mm diameter phosphor material made of ZnO: Zn was used, and this was placed in the groove of the support guide 103. ZnO: Zn is ZnNO ₃ It is formed by electroless plating using an aqueous solution containing dimethylamine borane and has a thickness of about 4 microns. In addition, a polycarbonate sheet having a thickness of 0.5 mm was bonded and sealed on the upper portion of the groove of the support guide 103. The inside of the groove, that is, the transparent medium 102 was evacuated by degassing and reducing the pressure from the hole connected to the groove.
[0088]
The laser diode 101 is arranged on the side surface of the support guide 103 so that the light beam 105 from the laser diode propagates through each transparent medium 102. Since the light of the laser diode 101 is excellent in straightness, it propagates preferentially through the transparent medium 104 over the size of the display area.
[0089]
As shown in FIG. 4A, a bar-shaped neodymium magnet 403 (length in the x direction: 40 mm, width in the y direction: 3 mm) is arranged close to the back side of the support guide plate 103. Placed on top. When the linear motor 402 is driven to periodically reciprocate the magnet 403 at 12 Hz, the phosphor 401 made of a steel ball to which a fluorescent material is attached moves following the movement of the neodymium magnet 403. At this time, almost no variation was observed between the movements of the 20 phosphor spheres.
[0090]
By applying the drive circuit 605 of FIG. 6 and driving the linear motor 402 to move the phosphor sphere 401 at 12 Hz in the y direction, the LD drive circuit 602 modulates the light emission intensity of the LD based on the image data. That is, by modulating the light emitting element 101 that outputs the light beam 105 propagating to the Px-th row in accordance with the position Py of y during the movement of the phosphor 401 in the Px-th row, the (Px, Py) position is obtained. The amount of light emitted was set and controlled. The phosphor 401 moves over a length of 40 mm in the y direction, and the central 30 mm length is used as a display area. At this time, the position and speed data of the phosphor 401 associated with the driving of the linear motor were stored as table data in the control circuit, and the light emitting element 101 was driven in view of the data. Thus, the observer recognizes the image as a two-dimensional image due to the effect of the afterimage. A moving image having a frame frequency of 24 Hz is formed corresponding to the scanning of the phosphor 401.
[0091]
It was confirmed that a desired image could be displayed on the display device of this example. That is, a laser display device having a new configuration has been realized in which a phosphor 401 in which a fluorescent material is coated on a steel ball is moved and excited by laser light. The image was bright enough and a clear video could be displayed. Further, the display device of this example did not require a matrix wiring or the like, and could be manufactured easily and at low cost. Furthermore, the display device was resistant to vibration.
[0092]
"Example 2"
The present embodiment is an example in which a phosphor is driven by a fluid flow to realize a 40 × 40 display device.
[0093]
In this embodiment, the same light emitting element 101 as that in Embodiment 1 was used. The violet laser is an LD array formed by arranging 40 lasers at a pitch of 1.2 mm.
[0094]
As the support guide 103, a glass capillary was used. The length of the glass capillary is 70 mm, the inner diameter is 0.9 mm, and the outer diameter is 1.1 mm. In the glass capillary 103, a glass sphere coated with a 0.8 mm diameter fluorescent material was disposed as the fluorescent substance 104. As the fluorescent material, (Zn, Cd) S: Ag was used for red, ZnS; Cu, Al was used for green, and ZnS: Ag was used for blue. The fluorescent material was a powder having an average particle size of about 7 μm. The powder was added to an aqueous solution of polybunyl alcohol as a binder and coated on glass spheres.
[0095]
Inside the glass capillary end, a capillary with a smaller diameter (length: 5 mm, inner diameter: 0.5 mm, outer diameter: 0.7 mm) was fixed. This small diameter capillary acts as a stopper for the phosphor 104, and the phosphor moves within a range of 60 mm in length. Forty glass capillaries 103 having the phosphors 104 were arranged on a glass substrate at a pitch of 1.2 mm.
[0096]
The laser diode 101 was arranged on the side surface of a glass capillary 103 serving as a support guide so that a light beam 105 from the laser diode propagated through each transparent medium (air) 102. The transparent medium 102, that is, the inside of the capillary is air, and by controlling the flow of this air, the phosphor 104 reciprocates in the capillary 103. The air flow is driven by the method shown in FIGS. 5C and 5D. A cylinder-type pressure control unit 504 is provided at one end of the capillary 103, and the pressure is raised and lowered, so that the air flow moves right and left. Repeated. At the other end of the capillary 103, an air vent hole is provided corresponding to the fluid reservoir 505. That is, when the pressure of the pressure control unit 504 increases, the air 102 flows to the left in FIG. 5C, and the phosphor 104 also moves to the left. Conversely, when the pressure of the pressure control unit 504 becomes negative, the air 102 flows rightward in FIG. 5C, and the phosphor 104 also moves rightward. As a result, the phosphor sphere 104 reciprocates at 15 Hz in the y direction.
[0097]
While moving the phosphor 104, the light emission intensity of the LD 101 was modulated by the LD drive circuit based on the image data. At this time, the position and speed data of the phosphor 104 associated with the airflow driving were stored in advance as table data, and the light emitting element 101 was driven in view of the data. The phosphor 104 was reciprocated over a distance of 60 mm, and a central 48 mm range was used as a display area. The position of the phosphor 104 was monitored by disposing a light receiving element as a sensor for detecting the position of the phosphor in the non-display area at the end. In this position sensing, the light emitted from the phosphor was used as the light source. The movement of the phosphor 104 is appropriately controlled based on the position monitor information. That is, the feedback control of the pressure control unit 504 enhances the certainty of the movement of the phosphor 104. Further, the position monitor information was used for driving the light emitting element 101 and correcting the modulation. As a result, a relatively stable moving image having a frame frequency of 30 Hz was formed.
[0098]
It was confirmed that the display device of the present example can also display a desired image. That is, a thin, full-color laser display device having a new configuration in which the phosphor 104 is moved to excite the phosphor 104 with laser light has been realized. The image was bright enough and a clear video could be displayed. The display device of this example also could be manufactured easily and at low cost without requiring a matrix wiring or the like. Another feature is that no electric wiring is used in the display area.
[0099]
"Example 3"
In the present embodiment, the configuration is the same as that of the second embodiment, except that a fluorinated resin (refractive index: 1.45) is used as a support guide 103 in a capillary tube and glycerin (refractive index: 1.47) is used as a transparent medium 102 Was charged. In addition, an InGaN ultraviolet LED (peak wavelength: 388 nm, output: 2 mW) was used as the light emitting element. As the phosphor, a capsule filled with a fluorescent material as shown in FIG. 2D was used. As a fluorescent material, Alq which is an organic light emitting material is used. ₃ Was used. The phosphor 104 was driven to reciprocate at 8 Hz according to Example 2 using a liquid flow control method.
[0100]
In this embodiment, by using the transparent medium (glycerin) 102 having a refractive index slightly smaller than that of the capillary which is the support guide 103, a refractive index waveguide structure is obtained, and the light beam 105 is effectively placed in the medium 102. Propagated. As a result, a good image could be formed even when an LED having a lower directivity than the LD was used as the light emitting element.
[0101]
In addition, since the difference in the refractive index between the support guide 103 and the transparent medium 102 is small, the transparency of the external light is excellent, so that the reflection of the external light can be suppressed, and a display device with excellent image visibility can be obtained. This display device is a so-called see-through display that is transparent when not displayed and allows the back side to be viewed when displayed. Further, in the present embodiment, since the support guide 103 is formed of a bendable capillary tube, the display section can be bent. That is, it is a so-called flexible display.
[0102]
"Example 4"
In the present embodiment, as shown in FIG. 9, a control unit 902 in which a light emitting element 101, a light emitting element driving circuit, a phosphor driving circuit and the like are disposed, and a display unit 901 in which the phosphor 104 is disposed are separately disposed. The respective light emitting elements 101 and the transparent medium 102 of the display unit 901 were connected by using a light guide cable 903 formed by arranging a plurality of light guides.
[0103]
The configuration of the display unit 901 is according to the second embodiment. However, the phosphor 104 had an elliptical spherical shape (major axis diameter 0.9 mm, minor axis diameter 0.7 mm). The light guide used a plastic optical fiber, which was connected to the inside of a capillary, so that light propagated through the fiber was coupled to the transparent medium 102. That is, the light beam 105 emitted from the laser 101 of the control unit 902 propagates through the light guide cable 903, and then propagates through the air (transparent medium) 102 in the glass capillary (support guide) 103, and the fluorescent substance 104 To excite. The phosphor 104 is moved by a controlled airflow via a fluid drive line 904 connected from the control unit 902. The observer recognizes the light from the phosphor 104 as a two-dimensional image under the influence of the afterimage. That is, by using the movement of the phosphor 104, a two-dimensional image is formed from the light beams 105 arranged in a line.
[0104]
Such a configuration is preferable because the configuration of the display unit 901 can be simplified. Further, by making the connection between the display unit 901, the light guide cable 903, and the control unit 902 detachable, a display device with excellent usability can be obtained. Further, in such a configuration, in the display unit 901, only the minute phosphor 104 moves at high speed, and the display unit 701 does not require electrical wiring.
[0105]
"Example 5"
Although the above embodiment is a display device, the present embodiment is an example in which the light source shown in FIG. The basic configuration of this embodiment is the same as that of the second embodiment, but an LED is used as the light emitting element 101. The LED 101 was simply driven continuously, the phosphor 104 was reciprocated at 15 Hz, and no particular position control was performed. Accordingly, a thin planar light source having a new configuration in which the phosphor 104 is moved to scan light with a line is realized.
[0106]
【The invention's effect】
As described above, according to the present invention, various devices can be realized with a simple configuration using a light emission mechanism having a simple configuration in which the phosphor moves along the guide means.
[0107]
That is, a thin display device can be realized by a display unit having a simple configuration including the phosphor, the support guide, and the transparent medium. Here, the display unit does not require a matrix electric wiring or a TFT transistor for each pixel. Further, a display device capable of displaying a relatively bright image can be obtained by simply arranging one excitation light emitting element per pixel row (column). Further, the display device is resistant to vibration. Depending on the configuration, a flexible display, a see-through display, or a three-dimensional display device can be easily realized. In addition, since various phosphors can be excited, color display can be designed flexibly while using the same kind of light emitting element.
[0108]
Further, a thin light source device can be realized with a simple configuration of the phosphor, the support guide, and the transparent medium. Even with the configuration of the light source device, a flexible light source or a see-through light source can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a configuration of a display device of the present invention.
FIG. 2 is a diagram showing a structural example of a phosphor used in the device of the present invention.
FIG. 3 is a diagram showing a configuration example of a support guide used in the apparatus of the present invention.
FIG. 4 is a diagram showing a method of moving a phosphor (an example using magnetic force).
FIG. 5 is a diagram illustrating a method of moving a phosphor (an example using a fluid flow).
FIG. 6 is a block diagram illustrating an overall configuration example of a display device according to the present invention.
FIG. 7 is a cross-sectional view illustrating some configuration examples of the display device of the present invention.
FIG. 8 is a perspective view showing an example of the stereoscopic display device of the present invention.
FIG. 9 is a perspective view showing an example of the display device of the present invention including a display unit, a control unit, and a light guide cable.
FIG. 10 is a diagram illustrating an example of a conventional display device.
[Explanation of symbols]
101 light emitting element
102 Transparent medium
103 Support Guide
104 phosphor
105 ray bundle
201 Fluorescent material
202 spheres such as glass and resin
203 magnetic material
204 transparent capsule
401 Phosphor having magnetic material
402 linear motor
403 magnet
404 magnetic field generation electrode
501 solenoid valve
502 Low pressure part
503 High pressure section
504 Pressure control unit
505 Fluid pool
601 Display panel
602 Light emitting element drive circuit
603 control circuit
604 Image input unit
605 phosphor driving circuit
606 phosphor position sensor
901 display unit
902 control unit
903 light guide cable
904 fluid drive line

Claims (33)

A phosphor that emits light when excited by incident light; a guide that guides the phosphor; and a driving unit that moves the phosphor along an extension direction of the guide. A light emitting mechanism comprising a phosphor and a guide means configured to irradiate incident light at a substantially constant direction with respect to the extension direction at each position. The light emitting mechanism according to claim 1, wherein a plurality of phosphors are provided, and one guide unit is provided for each phosphor, and the plurality of guide units extend in parallel with each other. A scatterer that scatters incident light and changes its propagation direction is provided together with the phosphor, and one guide is provided for the scatterer, and the plurality of guides of the phosphor and the scatterer are parallel to each other. The light emitting mechanism according to claim 1, wherein the light emitting mechanism is extended. The light emitting mechanism according to any one of claims 1 to 3, wherein the incident light is configured to travel or guide along the extension direction of the guide means. The light emitted from the phosphor or the light scattered by the scatterer is configured to be directed in a direction substantially perpendicular to the direction in which the guide means extends. Light emission mechanism according to 1. 6. The light emitting mechanism according to claim 2, wherein the plurality of phosphors or scatterers are configured to move along respective guide means while maintaining a predetermined relative relationship. . A phosphor excited by the incident light to emit light, a guide means for guiding the phosphor, and a phosphor disposed between a light emitting position excited by the incident light to emit light and a retracted position not excited by the incident light. A light emitting mechanism having driving means for moving the guide member along the direction in which the guide means extends. A scatterer that scatters incident light to change its propagation direction is provided together with the phosphor, and a guide unit is also provided for the scatterer, and a scattering position where the incident light can be scattered and a retreat position where the incident light cannot be scattered. 8. The light emitting mechanism according to claim 7, further comprising a driving means for moving the scatterer along the extension direction of the guide means between the light emitting device and the light emitting device. A plurality of phosphors or scatterers are provided, and one guide means is provided for each phosphor or scatterer. 9. The light emitting mechanism according to claim 7, wherein the light emitting mechanism extends in parallel and is arranged in parallel with each other. The light emitting mechanism according to claim 9, wherein the plurality of guide means are two-dimensionally arranged. 9. The scatterer is moved along a direction in which the guide means extends while maintaining a substantially constant posture with respect to the direction in which the guide means extends. , 9, and 10. The light emitting mechanism according to any one of claims 1 to 11, wherein a movement direction of the phosphor or the scatterer is restricted to one direction by a guide means, and moves in a transparent medium. The light emitting mechanism according to any one of claims 1 to 12, wherein the guide unit has a tube shape, and a phosphor or a scatterer moves in the tube. 14. The light emitting mechanism according to claim 1, wherein the phosphor or the scatterer has a substantially spherical shape. 15. The light emitting mechanism according to claim 1, wherein the movement of the phosphor or the scatterer is controlled by a flow of a transparent medium which is a fluid in the guide means. 15. The phosphor or scatterer according to claim 1, wherein the phosphor or the scatterer is made of a magnetic material, and the movement of the phosphor or the scatterer is controlled by controlling a magnetic field acting on the phosphor or the scatterer. The light emitting mechanism according to any one of the above. 17. The light emitting mechanism according to claim 12, wherein a refractive index of said transparent medium is larger than a refractive index of said guide means. 18. The light emitting mechanism according to claim 1, wherein said guide means is configured to be bendable. 19. The light emitting mechanism according to claim 12, wherein the guide means and the transparent medium are made of a material transparent to visible light. 20. A light emitting device according to claim 1, further comprising: a light emitting element; and a propagating light from the light emitting element is arranged in the extending direction at each position of the phosphor or the scatterer in the guide means. A phosphor or a scatterer and guide means are configured so as to be irradiated from a substantially constant direction with respect to the light, and a display is performed by light emitted from the phosphor or light scattered by the scatterer. A display device. A plurality of phosphors or scatterers are provided, and one guide means and at least one light emitting element are provided for each phosphor or scatterer, and the plurality of guide means extend parallel to each other. The display device according to claim 20, wherein: 22. The light-emitting device according to claim 20, wherein the light-emitting device is disposed at an end of the guide device so that propagation light emitted from the light-emitting device travels or is guided along the extension direction of the guide device. Display device. Modulating means for modulating the amount of light emitted from the light emitting element, and detecting means for detecting the position of the phosphor or scatterer in the guide means, the position of the phosphor or scatterer in the guide means, and a display information signal 23. The display device according to claim 20, wherein the modulation means is controlled based on the control signal so that the display is performed by the light emitted from the phosphor or the light scattered by the scatterer. The display device according to the above. 20. A light emitting mechanism according to claim 7 and a light emitting element for emitting the incident light, wherein display is performed by light emitted from a phosphor or light scattered by a scatterer. A display device characterized by being performed. A plurality of phosphors or scatterers are provided, and one guide means is provided for each of the phosphors or scatterers, and the plurality of guide means are arranged in the propagation direction along the propagation direction of light from the light emitting element. 25. The display device according to claim 24, wherein the display device extends in a direction not parallel to and is arranged in parallel with each other. Modulating means for modulating the amount of light emitted from the light emitting element, the position of the phosphor or scatterer in the guide means, and the modulating means is controlled based on the display information signal, the light emitted by the phosphor or 26. The display device according to claim 24, wherein display is performed using light scattered by the scatterer. The display device according to any one of claims 20 to 26, wherein the light emitting element is a laser diode. The display device according to any one of claims 20 to 27, wherein the display area is bendable by configuring the guide means as bendable. 28. The guide means and the transparent medium are made of a material transparent to visible light, and the display area is constituted as a see-through display transparent to outside light. 29. The display device according to any one of 28. A plurality of two-dimensionally arranged light emitting elements, a plurality of phosphors which are excited by the two-dimensionally arranged light flux emitted from the light emitting elements and emit light, or a scatterer which scatters the light flux and changes its propagation direction, The device is configured as a stereoscopic display device including a modulator that modulates the amount of light emitted from the plurality of light emitting elements, and a driver that moves the phosphor or the scatterer in a direction perpendicular to a plane in which the light beams are arranged. The display device according to any one of claims 20 to 23 and 27 to 29, wherein: A control unit having a plurality of light emitting elements and a modulating means for modulating the plurality of light emitting elements; a light guide cable for transmitting light from the plurality of light emitting elements; and a plurality of light guide cables for transmitting the light guide cable from the control unit. A display unit for forming an image using the light beam of the light guide cable. The display unit is arranged by arranging the light beam that has propagated through the light guide cable, and is excited by the transparent medium that propagates in the display surface direction and the light beam. The display device according to any one of claims 20 to 30, further comprising: a phosphor that emits light and scatters the light beam to change its propagation direction. 20. A light emitting mechanism according to any one of claims 1 to 6 and 11 to 19, and a light emitting element that emits the incident light, and light propagating from the light emitting element is located at each position of a phosphor or a scatterer in a guide unit. In the above, a phosphor or a scatterer and guide means are configured so as to be irradiated from a substantially constant direction with respect to the elongation direction, so that the light is emitted by the phosphor or the light scattered by the scatterer. A light source device characterized by being constituted. A light emitting mechanism according to any one of claims 1 to 19, and a light emitting element that emits the incident light, wherein the light emitting mechanism is configured to irradiate with light emitted by a phosphor or light scattered by a scatterer. A light source device.

Images