JP2009056287A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device capable of displaying a high-definition image while reducing the cost and reducing the size. <P>SOLUTION: This image display device has an excitation light wavelength band reflector 418 formed on an output side of a light beam from the light irradiation system with respect to the screen 41 and having a function to reflect light in a wavelength band of the excitation light toward the screen. A visible light in a laser light L1 develops a color by diffusion by being projected on the screen 41, while the excitation light in the laser light L1 develops a color, which is different from the color developed by the visible light, by fluorescence by being projected in the fluorescent region 411 so as to display an image according to the image information on the screen 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image display device.

For example, an image display device that displays an image on a screen by scanning in the main scanning direction (horizontal direction) and the sub-scanning direction (vertical direction) while modulating the intensity of laser light is known (for example, Patent Document 1). reference.).
As such an image display apparatus, as disclosed in Patent Document 1, an apparatus that displays a full-color image has been proposed.

A full-color image is displayed by developing three primary colors of red, blue, and green. However, in Patent Document 1, two colors of the three primary colors are irradiated onto the screen, and the two colors are displayed on the screen. Each color is colored by scattering, and the phosphor uniformly applied on the screen is irradiated with an ultraviolet laser beam to excite the phosphor, and the remaining one of the three primary colors is excited by the fluorescence. Let the color develop.
Thus, by displaying a full-color image using a phosphor, it is possible to reduce the size of the light source to be used, and thus to reduce the size of the image display device.

  However, in the image display device according to Patent Document 1, when the thickness of the phosphor on the screen is thinned, when an ultraviolet or blue-violet laser beam is used as excitation light, most of it contributes to excitation of the phosphor. Accordingly, not only the output of the excitation light laser is wasted through the screen, but also the amount of fluorescent light emission is reduced, or an unintended color change occurs in the displayed image. On the other hand, when the thickness of the phosphor on the screen is increased, the two colors of laser light other than the excitation light are diffused and attenuated by the phosphor, and the utilization efficiency of the two colors of laser light is poor, and the contrast of the image There is a problem in that quality such as brightness and brightness is deteriorated, and a high-intensity light source is required, so that cost reduction and downsizing cannot be sufficiently achieved.

JP 2003-287802 A

  An object of the present invention is to provide an image display device capable of displaying a high-quality image while reducing cost and size.

Such an object is achieved by the present invention described below.
An image display device of the present invention includes a screen having a fluorescent region including a fluorescent material,
A first light source that emits excitation light capable of exciting the fluorescent material, at least one second light source that emits visible light, and the first light source and the second light source according to image information, respectively. A light irradiating means comprising: a driving means for driving; and a scanning means for scanning light from each of the first light source and the second light source on the screen in a main scanning direction and a sub-scanning direction intersecting therewith. When,
An excitation light wavelength band reflector provided on the light emission side of the light irradiation means with respect to the screen, and having a function of reflecting light in the wavelength band of the excitation light toward the screen;
The visible light emitted from the second light source is projected onto the screen and diffused and colored, and the excitation light emitted from the first light source is projected onto the fluorescent region to define the visible light. It is characterized in that it is colored by fluorescence in different colors and an image corresponding to the image information is displayed on the screen.

  Thereby, excitation light that has passed through the screen without contributing to excitation of the fluorescent material can be reflected (returned) toward the screen (fluorescence region), and excitation of the fluorescent material can be promoted. As a result, it is possible to improve the apparent light emission efficiency (excitation efficiency from excitation light to fluorescence) of the fluorescent material by the excitation light, easily and reliably prevent the lack of color development due to the fluorescence, and display a high-quality image. . Furthermore, since unnecessary excitation light leakage can be prevented, a high-quality image can be displayed without losing color balance even when the excitation light is visible light.

In the image display device of the present invention, it is preferable that the screen has a display area for displaying the image, and the fluorescent area is formed uniformly over substantially the entire area of the display area.
Thereby, formation of a fluorescence area | region can be simplified and an image display apparatus can be made cheaper.
In the image display device of the present invention, it is preferable that the excitation light wavelength band reflector has a function of preventing the excitation light from passing through the screen and leaking outside.
Thereby, unnecessary leakage of excitation light can be prevented more reliably.

In the image display device of the present invention, it is preferable that the excitation light wavelength band reflector is composed of an optical multilayer thin film.
As a result, the excitation light wavelength band reflector exhibits excellent wavelength selectivity, and prevents the use efficiency of the visible light from the second light source from being lowered, while the emission efficiency of the fluorescent material by the excitation light (excitation light to fluorescence). Conversion efficiency). In addition, by optimizing the wavelength selection range of the excitation light wavelength band reflector, it is possible to prevent the attenuation of visible light from the second light source and to prevent unintended color changes in the displayed image. Can be.

In the image display device of the present invention, the light irradiation unit includes two light sources that emit light of two colors of red, green, and blue, respectively, as the second light source, and the fluorescent region includes the light source It is preferable that the excitation light from the second light source emits a color other than the two colors of red, green, and blue when irradiated with the excitation light.
Thereby, a full-color image can be displayed.

In the image display device of the present invention, the light irradiation unit includes two light sources that respectively emit red and blue light as the second light source, and the fluorescent region has excitation light from the second light source. It is preferable to be configured to develop a green color when irradiated with.
As a result, the first light source and the second light source can be configured by semiconductor lasers, respectively, and a full-color image can be displayed while reducing the size and cost of the image display device. At this stage, there is no effective realization method of a semiconductor laser that emits green light that can be modulated at high speed. In such a case, the effect of applying the present invention becomes significant.

In the image display device according to the aspect of the invention, the light irradiation unit may combine the excitation light emitted from the first light source and the visible light emitted from the second light source, and It is preferable that the same region is irradiated at the same time.
Accordingly, since the scanning unit only needs to scan one light, the configuration of the scanning unit can be simplified, and as a result, the image display apparatus can be reduced in size and cost.

In the image display device of the present invention, reflected excitation light that reflects the reflected light of the excitation light from the excitation light wavelength band reflector toward the screen on the incident side of the light from the light irradiation unit with respect to the screen. A reflector is preferably provided.
Thereby, the utilization efficiency of excitation light can be improved more.
In the image display device of the present invention, it is preferable that the reflected excitation light reflector is composed of a polarizing plate.
For example, when a linearly polarized laser is used as the excitation light, the polarization of the excitation light changes when reflected by the excitation light wavelength band reflector. Therefore, the changed reflected light can be reflected toward the screen by the reflected excitation light reflector.

In the image display device of the present invention, the incident side of the light from the light irradiation means with respect to the screen is allowed to transmit the visible light and the excitation light, and the fluorescence emitted from the fluorescent region is transmitted. It is preferable that a fluorescent wavelength band reflector having a function of reflecting all or part of the wavelength band is provided.
As a result, the fluorescence scattered by the fluorescent material (screen) to the incident side can be directed to the emission side, so the amount of emitted fluorescence (utilization efficiency of the fluorescence generated in the fluorescence region) is increased, and the luminance is increased. A high-quality image can be displayed. Furthermore, when the fluorescent wavelength band reflector has wavelength selectivity, the color purity can be increased, and a high-luminance and high-quality image can be displayed.

In the image display device of the present invention, the fluorescent wavelength band reflector is preferably composed of an optical multilayer thin film.
As a result, the fluorescent wavelength band reflector exhibits excellent wavelength selectivity, and can improve the utilization efficiency of the fluorescence generated in the fluorescent region while preventing a decrease in the utilization efficiency of the excitation light from the first light source. it can. Further, by optimizing the wavelength selection range of the fluorescent wavelength band reflector, it is possible to display an image with improved color purity and excellent color reproducibility.

In the image display device of the present invention, it is preferable that the first light source is a laser light source.
Thereby, the configuration of the optical system can be simplified, and the size and cost of the image display device can be reduced.
In the image display device of the present invention, it is preferable that the screen has a three-dimensional uneven portion.
Thereby, by displaying a three-dimensional image, the expressive power of the image can be enriched with unexpectedness and power.

In the image display device of the present invention, it is preferable that the screen can be advanced and retracted.
Thereby, the diversity of expression can be improved.
In the image display device of the present invention, it is preferable that the three-dimensional uneven shape is configured to change dynamically.
Thereby, the diversity of expression can be improved.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an image display device of the invention will be described with reference to the accompanying drawings.
<First Embodiment>
First, a first embodiment of the image display device of the present invention will be described.
FIG. 1 is a perspective view showing an appearance of a slot machine to which the present invention is applied as a first embodiment of an image display apparatus according to the present invention.

Hereinafter, an example in which the image display device of the present invention is applied to a slot machine will be described. However, the image display device of the present invention is not particularly limited as long as it has a portion for displaying an image, and various devices. It is applicable to.
The slot machine 10 includes a box-shaped casing 11, and a display window 12 is provided at the center of the front panel surface 11 a of the casing 11, and a console 11 b at the center front of the casing 11. Above, a start lever 14a, a bet button 14b, and a coin insertion slot 14c are provided. In addition, three stop buttons 16 are provided on the upper surface of the panel surface 11 c at the lower front surface of the housing 11.

  Further, in the housing 11, three spinning reels 21, 22, 23 are provided so as to face the display window 12, and a pattern formed on the peripheral surface of the three spinning reels 21, 22, 23. Can be observed through the display window 12 from the outside of the housing 11. Further, in the housing 11, a first screen 41 (hereinafter simply referred to as “screen 41”) that can advance and retreat in the vertical direction is provided near the lower portion of the display window 12. A second screen 42 (hereinafter also simply referred to as “screen 42”) that can move forward and backward is provided. These screens 41 and 42 constitute a part of an image display device 30 described later, and light is irradiated from the inside of the housing 11 to project an image. The image display device 30 will be described in detail later.

  Each spinning reel 21, 22, 23 starts rotating individually when the player pushes the bet button 14b and operates the start lever 14a after the coin is inserted into the coin insertion slot 14c. Then, when each stop button 16 is pressed by the player, the rotation of the corresponding reel among the spinning reels 21, 22, and 23 is stopped. When the rotations of all the reel reels 21, 22, and 23 are stopped and the patterns displayed on these peripheral surfaces are in a specific set, the corresponding coins are paid out. At this time, screens 41 and 42 appear in the display window 12 according to the progress of the game, and displays corresponding to the progress of the game, such as a win effect, a notice effect, a sign effect, etc. Various displays including it are performed. The specific display on the screens 41 and 42 includes, for example, displaying that it is an opportunity when a specific symbol such as cherry appears.

FIG. 2 is a longitudinal sectional view for explaining the image display device provided in the slot machine shown in FIG.
As described above, each reel 21, 22, 23 arranged to face the display window 12 is individually driven around a horizontal axis by being driven by a motor 25 which is a rotation driving device.
An image display device 30 according to the present invention is disposed around the spinning reels 21, 22, and 23.

The image display device 30 is a direct drawing type projector, and includes a screen device 40, a projector main body 50, a light guide optical system 60, and a display control device 80.
The projector main body 50 is configured to emit two laser beams L1 and L2, as will be described in detail later. The laser beam L1 is emitted from the projector main body 50 so as to pass below the spinning reels 21, 22, and 23, is directly incident on the first screen 41, and is scanned on the first screen 41. On the other hand, the laser beam L2 is emitted from the projector main body 50 so as to pass through the rear side of the spinning reels 21, 22, and 23, enters the second screen 42 via the light guide optical system 60, and is incident on the second screen 42. Is scanned.

  As described above, the screen device 40 includes the first screen 41 and the second screen 42 provided in the vicinity of the display window 12, the first lifting device 44 for moving the first screen 41 back and forth, and the first screen 42 for moving the second screen 42 back and forth. 2 lifting device 45. Here, both the lifting and lowering devices 44 and 45 function as devices for moving (advancing and retreating) the screens 41 and 42 as necessary.

FIG. 3 is a diagram for explaining a screen provided in the image display apparatus shown in FIG. 2, wherein (a) is a plan view of the first screen 41 when no image is displayed, and (b). (A) is sectional drawing of the 1st screen 41 shown to (a), (c) is a top view which shows an example of the 1st screen 41 when the image is displayed.
The first screen 41 has a substantially long band shape, and a three-dimensional portion 41a having a three-dimensional shape is provided at the center in the longitudinal direction. The three-dimensional part 41a has a three-dimensional uneven shape protruding to the front side. In the present embodiment, the three-dimensional part 41a is shown as a convex part protruding only on the front side, but the three-dimensional part 41a may be formed as a concave part protruding (recessed) only rearward. Alternatively, it may be formed as an uneven portion protruding forward and backward.

  As described above, the laser light L1 emitted from the projector main body 50 shown in FIG. The laser beam L1 is scanned in the main scanning direction and the sub-scanning direction intersecting the entire area on the first screen 41 including the three-dimensional part 41a. Thus, for example, a facial expression EI imitating, for example, a facial projection can be drawn (displayed) on the three-dimensional portion 41a in correspondence with, for example, a hit effect, a notice effect, or a sign effect (see FIG. 3C).

  In the above description, it is assumed that drawing (image display) is performed on almost the entire first screen 41. However, the projector body 50 can set a drawing range by the laser light L1 with a high degree of freedom. Therefore, for example, only one of the first to third areas A1 to A3 shown in FIG. 3C can be drawn, or drawing can be performed by switching these areas A1 to A3.

The first screen 41 includes a fluorescent region including a fluorescent material. As described later, the first screen 41 scatters visible light to generate color, and excites the fluorescent region with excitation light to generate color by fluorescence. An image can be displayed. The first screen 41 will be described later in detail.
Further, the second screen 42 (see FIG. 2) also has the same structure as the first screen 41 described above, and is scanned at a proper position in the second screen 42 by scanning with the laser light L2 emitted from the projector main body 50. For example, it is possible to display a stereoscopic image or the like that changes in response to a hit effect, a notice effect, a sign effect, or the like.

  The first lifting device 44 can lift and lower the first screen 41 under the control of the display control device 80, and the display position (solid line) where the first screen 41 is lifted and exposed to the lower part of the display window 12; The first screen 41 can be lowered and moved back and forth between the non-display position (dotted line) retracted below the display window 12. In other words, when the first screen 41 is not displayed, the first screen 41 is moved to the non-display position and hidden. On the other hand, when the first screen 41 is displayed, the first screen 41 is moved to the display position. Thus, the display window 12 can be observed. Furthermore, it is possible to increase the unexpectedness and power as a display effect accompanying the progress of the game, including image distortion caused by movement of the three-dimensional part.

The second lifting and lowering device 45 can also lift and lower the second screen 42 under the control of the display control device 80, and the display position (solid line) where the second screen 42 is lowered and exposed to the upper part of the display window 12, The second screen 42 can be moved up and down with respect to the non-display position (dotted line) retracted above the display window 12. That is, when the display is not performed on the second screen 42, the second screen 42 is moved to the retracted position to be hidden, and when the display is performed on the second screen 42, the second screen 42 is moved to the display position. Thus, it is possible to observe through the display window 12.
The projector main body (light irradiating means) 50 is disposed below the spinning reels 21, 22, and 23, and directly or indirectly irradiates the screens 41 and 42 with the laser beams L1 and L2.

FIG. 4 is a schematic diagram showing a schematic configuration of the light irradiation means provided in the image display apparatus shown in FIG.
The projector main body 50 includes a light source device 51 that emits a modulated small-diameter light beam as substantially parallel light, a light scanning unit (scanning unit) 53 that scans the light beam from the light source device 51, a light source device 51, and a light scanning unit. And a driving device (driving means) 55 that operates 53 in accordance with an input signal.

The light source device 51 includes laser light sources (light sources) 51r, 51b, and 51v for each color, three collimator lenses 52a1, 52a2, and 52a3 provided corresponding to the laser light sources 51r, 51b, and 51v, a mirror 52c, and a dichroic. Mirrors 52v and 52b.
The laser light source 51v emits blue-violet laser light VV (hereinafter also simply referred to as “excitation light”) that is excitation light that can excite the fluorescent material (first light source). The laser light source 51r emits red laser light RR (hereinafter also simply referred to as “visible light”) that is visible light (second light source). The laser light source 51b emits blue laser light BB (hereinafter also simply referred to as “visible light”) that is visible light (second light source). The laser beams RR, BB, and VV of the respective colors are modulated in accordance with the driving signal transmitted from the driving device 55, and are substantially collimated by collimator lenses 52a1, 52a2, and 52a3 that are collimating optical elements to form a thin beam. .

The dichroic mirror 52v has a characteristic of reflecting the blue-violet laser light VV, and the dichroic mirror 52b has a characteristic of reflecting the blue laser light BB.
The laser beam RR reflected by the mirror 52c, the laser beam VV reflected by the dichroic mirror 52v, and the laser beam BB reflected by the dichroic mirror 52b are combined into one laser beam LL.

That is, the laser beam VV, the laser beam RR, and the laser beam BB are combined and simultaneously irradiated onto the same areas on the screens 41 and 42. Thereby, since the optical scanning unit 53 only needs to scan one light, the configuration of the optical scanning unit 53 can be simplified. As a result, the image display device 30 can be reduced in size and cost. it can.
In the light source device 51 described above, a collimator mirror can be used in place of the collimator lenses 52a1, 52a2, and 52a3. In this case as well, a thin beam of substantially parallel light beams can be formed. Further, when the laser beams emitted from the laser light sources 51r, 51b, and 51v of the respective colors are substantially parallel light beams, the collimator lenses 52a1, 52a2, and 52a3 can be omitted. Furthermore, the laser light sources 51r, 51b, and 51v can be replaced with light sources such as light emitting diodes that generate similar light beams.

As described above, when the laser light sources 51r, 51b, and 51v are laser light sources, the configuration of the optical system can be simplified, and the image display device 30 can be reduced in size and cost.
The optical scanning unit 53 scans the light from each of the laser light sources 51r, 51b, and 51v on the screens 41 and 42 in the main scanning direction and the sub-scanning direction intersecting with the mirrors. 53d and 53e.

  The mirror 53a is provided to be rotatable about the rotation axis AX1, and the mirror 53b is provided to be rotatable about the rotation axis AX2. The actuator 53d operates in accordance with a drive signal from the drive device 55 and appropriately rotates the mirror 53a around the rotation axis AX1, and the actuator 53e operates in accordance with the drive signal from the drive device 55 to move the mirror 53b around the rotation axis AX2. Rotate appropriately. Accordingly, the main scanning can be performed in the direction perpendicular to the rotation axis AX1 by the rotation of the mirror 53a, and the sub-scanning can be performed in the direction perpendicular to the rotation axis AX2 by the rotation of the mirror 53b. As a result, the laser light LL having passed through the mirrors 53a and 53b can be directly drawn at arbitrary positions on the screens 41 and 42 by scanning a desired area two-dimensionally as the laser lights L1 and L2.

As the optical scanning unit 53, for example, a biaxial galvanometer mirror or a MEMS (Micro Electro Mechanical Systems) element in which an actuator is integrally formed on a semiconductor substrate by a thin film manufacturing process can be used.
The driving device 55 drives the light source device 51 and the optical scanning unit 53 in accordance with an electrical signal (image information) transmitted from a control device (not shown). The driving device 55 controls the operations of the light source device 51 and the optical scanning unit 53 while synchronizing the light source device 51 and the optical scanning unit 53, and adjusts the intensity, projection position, irradiation timing, and the like of the laser light LL. I do.

FIG. 5 is a diagram for explaining optical scanning by the light irradiation means (projector body 50) shown in FIG. In FIG. 5, a projected image on the screen 41 is schematically shown.
Laser light L1 (see FIG. 4) emitted from the projector main body 50 is first along the trajectory TR1 in the X direction positive direction (right direction in FIG. 5) from the uppermost left end of the image display area DD of the screen 41. Scanned. At this time, the respective outputs of the laser light sources 51r, 51b, 51v in FIG. 4 are controlled, and the pixels PE1 arranged in the X direction are illuminated (projected) with the necessary luminance by the spot-like laser light L1.

  Next, the laser beam L1 reaching the right end of the image display area DD is shifted by one pixel in the Y direction negative direction (downward in FIG. 5), and then in the X direction negative direction (left direction in FIG. 5). Are scanned along the trajectory TR2. At this time, the outputs of the laser light sources 51r, 51b, and 51v in FIG. 4 are controlled, and the pixels PE2 arranged in the X direction are illuminated (projected) with the necessary luminance by the spot-like laser light L1.

  The laser beam L1 that has reached the right end of the image display area DD again is shifted by one pixel in the negative Y direction, and then scanned along the trajectory TR3 in the positive X direction. At this time, the respective outputs of the laser light sources 51r, 51b, 51v in FIG. 4 are controlled, and the pixels PE3 arranged in the X direction are illuminated with the necessary luminance by the spot-like laser light L1. Thereafter, by repeating the above-described operation, the laser beam L1 is scanned over the entire image display area DD.

  Note that FIG. 5 illustrates a case where drawing is performed on a planar portion, but the same drawing can be performed on the above-described three-dimensional portion 41a. However, since the pixels PE1, PE2,... Shown in FIG. 5 are projected on the curved surface for the three-dimensional part 41a, an image with distortion corrected in advance can be projected as necessary. For this purpose, an image processing circuit and a storage device are provided in the display control device 80, which will be described later, so that high-speed arithmetic processing and a large amount of images are stored. Thereby, the projection distortion can be removed in advance by image processing such as coordinate conversion, or an image in which the projection distortion is canceled by the three-dimensional part 41a can be stored in advance, so that the three-dimensional part 41a has no distortion. Can be projected.

  The light guide optical system 60 (see FIG. 2) is an intervening mirror disposed on the optical path of the laser light L2, and reflects the laser light L2 emitted from the projector main body 50 toward the second screen 42. Here, the reflecting surface of the light guide optical system 60 is not limited to a simple spherical surface but can be formed as an arbitrarily shaped curved surface (aspherical surface), and a light beam emitted from the projector body 50 is projected on the second screen 42. It is configured to appropriately enter the region. Further, since the light beam emitted from the projector main body 50 is an extremely thin beam as described above, the image drawn on the second screen 42 can be made free from blur and distortion.

6 is a block diagram showing a schematic configuration of a control system of the image display apparatus shown in FIG.
The display control device 80 is a circuit device that operates based on a control signal from the game control circuit 90, and includes a display control circuit 81, an image processing circuit 82, and a storage device 84.
The display control circuit 81 controls the overall operation of the image display device 30 based on the control signal from the game control circuit 90. Specifically, the display control circuit 81 determines the operation timing and display contents of the projector main body 50 based on the control signal from the game control circuit 90 and controls the driving of the lifting devices 44 and 45.

Under the control of the display control circuit 81, the image processing circuit 82 appropriately operates the driving device 55 based on a command from the game control circuit, and causes the projector main body 50 to perform necessary drawing. The storage device 84 stores image information such as a pattern and a character as a source of an image to be projected onto the screens 41 and 42 by the projector main body 50.
In the slot machine 10 described above, since the optical scanning unit 53 scans the laser beams L1 and L2 from the light source device 51 on the screens 41 and 42, an arbitrary image is drawn on the screens 41 and 42 with high quality. Such images can be used to produce various and sophisticated effects during the progress of the game. When drawing is performed on the screens 41 and 42 by scanning the laser beams L1 and L2 by the light scanning unit 53, the display position and display area of the image including the arrangement of the screens 41 and 42 can be freely changed. Can increase the diversity of expression. Furthermore, since a three-dimensional drawing can also be performed on the three-dimensional part 41a to display a three-dimensional image, the display effects accompanying the progress of the game can be rich with unexpectedness and power. .

Here, the first screen 41 will be described in detail. Since the second screen 42 is the same as the first screen 41, the description thereof is omitted.
7 is a cross-sectional view of the screen and its peripheral part provided in the image display device shown in FIG. 2, and FIG. 8 shows the configuration of the fluorescent wavelength band reflector provided on the incident side with respect to the screen shown in FIG. 9 is a cross-sectional view showing the configuration of the excitation light wavelength band reflector provided on the emission side with respect to the screen shown in FIG.

As shown in FIG. 7, the first screen 41 has a screen body 413, and a fluorescent region 411 is provided on the surface of the screen body 413 on the incident side of the laser light L <b> 1.
The visible light emitted from the laser light sources 51r and 51b as the second light source is projected on the screen 41 (fluorescence region 411) and diffused and colored, and emitted from the laser light source 51v as the first light source. Excitation light is projected onto the fluorescent region 411 and colored by fluorescence in a color different from the visible light, and an image is displayed on the first screen 41. More specifically, red R and blue B are developed by the laser beams RR and BB, and green G by fluorescence is developed by the excitation light VV, so that a full color image is displayed on the first screen 41.

  Then, on the incident side of the laser beam L1 with respect to the screen 41 (fluorescence region 411), a fluorescence wavelength band reflector (fluorescence reflection layer) 415, a light transmission layer 416, and a reflected excitation light reflector 419 are sequentially laminated in this order. Has been. On the other hand, an excitation light wavelength band reflector (excitation light reflection layer) 418 is provided on the emission side of the laser light L1 with respect to the screen 41 (screen body 413).

  The screen body 413 is composed of a diffuser capable of diffusing light, and diffuses light of wavelength components corresponding to the laser beams RR and BB among the wavelength components included in the laser beam L1 and fluorescence generated in the fluorescence region 411. Thus, it has a function of displaying an image. In some cases, the fluorescent region 411 itself functions as a diffuser. In this case, the screen body 413 and the fluorescent region 411 are the same. Similarly, when the fluorescent material is contained in the screen main body 413, the screen main body 413 and the fluorescent region 411 are the same.

In the present embodiment, the fluorescent region 411 is uniformly formed over substantially the entire display region for displaying the image on the screen 41. Thereby, formation of the fluorescence area | region 411 can be simplified and the image display apparatus 30 can be made cheaper.
The fluorescent material included in the fluorescent region 411 is not particularly limited as long as it is excited by the laser light VV that is the excitation light described above and emits green fluorescence, and various fluorescent materials can be used. However, a material that is not excited by the laser light from the laser light sources 51r and 51b and has high emission efficiency by the laser light VV from the laser light source 51v, such as ZnS; Cu, Al, etc., is preferably used.

  Examples of fluorescent materials that emit green light include 9,10-bis [(9-ethyl-3-carbazole) -vinylenyl] -anthracene, poly (9,9-dihexyl-2,7-vinylenefluorenylene). ), Poly [(9,9-dioctylfluorene-2,7-diyl) -co- (1,4-diphenylene-vinylene-2-methoxy-5- {2-ethylhexyloxy} benzene)], poly [(9 , 9-dioctyl-2,7-divinylenefluorenylene) -ortho-co- (2-methoxy-5- (2-ethoxylhexyloxy) -1,4-phenylene)], among these One kind can be used alone, or two or more kinds can be used in combination.

  As described above, when the fluorescent region 411 is configured to develop a green color when irradiated with the excitation light from the laser light source 51v, the laser light sources 51r, 51b, and 51v are configured by semiconductor lasers, respectively. A full-color image can be displayed while reducing the size and cost. Since there is no effective method for realizing a semiconductor laser that emits green light at this stage, the effect of applying the present invention becomes significant in such a case.

In the present embodiment, green light is emitted by fluorescence, but red light can be emitted by fluorescence or blue light can be emitted by fluorescence.
Examples of fluorescent materials that emit red light include tris (1-phenylisoquinoline) iridium (III), poly [2,5-bis (3,7-dimethyloctyloxy) -1,4-phenylene vinylene], poly [ 2-methoxy-5- (2′-ethylhexyloxy) -1,4- (1-cyanovinylene) phenylene], poly [2-methoxy-5- (3,7-dimethyloctyloxy) -1,4-phenylenevinylene Among these, one kind can be used alone or two or more kinds can be used in combination.

Examples of fluorescent materials that emit blue light include 4,4′-bis (9-ethyl-3-carbazovinylene) -1,1′-biphenyl, poly [(9.9-dioctylfluorene-2,7- Diyl) -co- (2,5-dimethoxybenzene-1,4-diyl)], poly [(9,9-dihexyloxyfluorene-2,7-diyl) -ortho-co- (2-methoxy-5 {2-ethoxyhexyloxy} phenylene-1,4-diyl)], poly [(9,9-dioctylfluorene-2,7-diyl) -co- (ethylnylbenzene)] and the like. One kind can be used alone, or two or more kinds can be used in combination.
Such a fluorescent region 411 can be formed relatively easily by using various film forming methods and coating methods.

  The fluorescent wavelength band reflector 415 is provided on the incident side of the laser beam L1 with respect to the screen 41, and allows the fluorescence generated in the fluorescent region 411 while allowing each of the laser beams RR, BB, and VV in the laser beam L1 to pass therethrough. Has a function of reflecting the light. As a result, the direction of fluorescence scattered to the incident side by the screen 41 can be changed to the original emission side, so that the amount of emitted fluorescence (efficiency of fluorescence) is increased, and high brightness and high quality are achieved. An image can be displayed. Furthermore, when the fluorescent wavelength band reflector 415 has wavelength selectivity, the color purity can be further increased, and a high-luminance and high-quality image can be displayed.

In the present embodiment, the fluorescent wavelength band reflector 415 is bonded to the surface of the screen 41 on the fluorescent region 411 side. Thereby, the distance between the screen 41 and the fluorescence wavelength band reflector 415 can be made extremely small or zero, and the fluorescence reflected by the fluorescence wavelength band reflector 415 can be fed back to a desired pixel. As a result, it is possible to prevent unintended color mixing, color blur, and the like and display a high-quality image.
Such a fluorescent wavelength band reflector 415 is not particularly limited as long as it has a function as described above. For example, as shown in FIG. 8, the fluorescent wavelength band reflector 415 is configured by an optical multilayer thin film (dielectric multilayer film) or the like. be able to.

  More specifically, as shown in FIG. 8, the fluorescence wavelength band reflector 415 is configured by alternately laminating a plurality of low refractive index layers 415a and high refractive index layers 415b. In such a fluorescent wavelength band reflector 415, the laser beam L1 from the projector main body 50 is allowed to pass through, and the entire or part of the fluorescent wavelength band generated in the fluorescent region 411 is highly efficient. The thicknesses of the low refractive index layers 415a and the high refractive index layers 415b are set in accordance with these wavelengths.

The material constituting each of the high refractive index layers 415b as described above is not particularly limited as long as it can obtain the optical characteristics necessary for the fluorescent wavelength band reflector 415. For example, Ti ₂ O, Ta Examples include ₂ O ₅ and niobium oxide.
The material constituting each low refractive index layer 415a is not particularly limited as long as it is possible to obtain an optical characteristic necessary for the fluorescence wavelength band reflector 415 is not particularly limited, for example, like MgF _2, SiO ₂ It is done.

Further, the total number of layers of the high refractive index layer 415b and the low refractive index layer 415a in the fluorescent wavelength band reflector 415 can be obtained as long as the optical characteristics necessary for the fluorescent wavelength band reflector 415 can be obtained. Although not particularly limited, it is preferably 10 layers or more, more preferably 10 to 40 layers.
In this way, the fluorescent wavelength band reflector 415 formed of a multilayer film has desired characteristics by setting (adjusting) the thickness, the number of layers, and the material of the high refractive index layer 415b and the low refractive index layer 415a. Can be obtained.

The fluorescent wavelength band reflector 415 can be omitted.
A light transmission layer 416 is formed on the surface of the fluorescent wavelength band reflector 415 opposite to the fluorescent region 411.
The light transmission layer 416 has a function as a spacer that keeps the distance between a reflection excitation light reflector 419 and a fluorescent wavelength band reflector 415, which will be described later, at an optimum distance. Such a light transmission layer 416 is made of, for example, glass or resin, and is configured to transmit light of each wavelength of red, blue, green, and blue-violet.

Note that the light transmission layer 416 can be omitted. In this case, for example, the reflected excitation light reflector 419 is formed on the fluorescent wavelength band reflector 415.
A reflection excitation light reflector 419 is formed on the surface of the light transmission layer 416 opposite to the fluorescent wavelength band reflector 415. That is, the reflected excitation light reflector 419 is provided on the incident side of the laser light L1 from the projector main body 50 of the fluorescent wavelength band reflector 415.

The reflected excitation light reflector 419 has a function of reflecting the reflected light of the excitation light from the excitation light wavelength band reflector 418 described later toward the screen 41. With such a function, the utilization efficiency of excitation light can be further increased.
More specifically, the excitation light reflected from the excitation light wavelength band reflector 418 toward the screen 41 (reflected excitation light) partially contributes to excitation of the fluorescent material in the fluorescent region 411. The remaining portion does not contribute to excitation of the fluorescent material in the fluorescent region 411 and passes through the screen 41 (fluorescent region 411). Therefore, by providing the reflection excitation light reflector 419 as described above, the remaining reflection light as described above is reflected toward the screen 41 and used to excite the fluorescent material in the fluorescent region 411. Can be improved.

Such a reflected excitation light reflector 418 has the above-described function while allowing the laser light L1 from the projector body 50 to pass therethrough.
Therefore, the reflected excitation light reflector 418 is preferably composed of a polarizing plate. For example, when a linearly polarized laser is used as the excitation light, the excitation light changes in polarization when reflected by the excitation light wavelength band reflector 418, and in addition, the polarization is changed when passing through the screen body 413 as a diffuser. Disturbed. Therefore, a part of the disturbed light can be reflected by the reflected excitation light reflector 419 toward the screen.
Such a reflected excitation light reflector 418 can be omitted.

  On the other hand, the excitation light wavelength band reflector 418 provided on the opposite side (observation side) of the laser beam L1 with respect to the screen 41 reflects the excitation light toward the screen 41 (more specifically, the fluorescent region 411). It has the function to do. As a result, excitation light transmitted through the screen 41 without contributing to excitation of the fluorescent material can be fed back to the screen 41 (fluorescence region 411) to promote excitation of the fluorescent material. As a result, it is possible to improve the light emission efficiency of the fluorescent material by the excitation light (conversion efficiency from the excitation light to the fluorescence), to easily and surely prevent the lack of color development due to the fluorescence, and to display a high-quality image. Furthermore, since unnecessary excitation light can be prevented from leaking, even when the excitation light is visible light, a high-quality image can be displayed without losing color balance.

Further, the excitation light wavelength band reflector 418 has a function of transmitting the light wavelengths from the laser light sources 51r and 51b and the wavelengths of the fluorescence generated in the fluorescent region 411, that is, red, blue, and green wavelengths. Have Thereby, it is possible to prevent the excitation light wavelength band reflector 418 from hindering image display.
Further, the excitation light wavelength band reflector 418 is not particularly limited as long as it has the above-described function, but is preferably composed of an optical multilayer thin film. Thereby, the excitation light wavelength band reflector 418 exhibits excellent wavelength selectivity (the wavelength selection area becomes a narrow band), while preventing the use efficiency of the visible light from the laser light sources 51r and 51b from being lowered, and the excitation light. The luminous efficiency (conversion efficiency from excitation light to fluorescence) of the fluorescent material can be improved. Also, by optimizing the wavelength selection range of the excitation light wavelength band reflector 418, attenuation of visible light from the laser light sources 51r and 51b can be prevented, and unintended color changes can occur in the displayed image. Can be prevented.

Such an excitation light wavelength band reflector 418 is not particularly limited as long as it has the functions described above. For example, as shown in FIG. 9, an optical multilayer thin film (dielectric multilayer film) is used. can do.
More specifically, the excitation light wavelength band reflector 418 includes a plurality of low refractive index layers 418a and high refractive index layers 418b alternately as shown in FIG. It is configured by stacking. In such an excitation light wavelength band reflector 418, according to these wavelengths so as to reflect only the excitation light with high efficiency while permitting transmission of light of each wavelength of red, blue, and green. Thus, the thickness of each high refractive index layer 418b and each low refractive index layer 418a is set.

The material constituting each of the high refractive index layers 418b as described above is not particularly limited as long as the optical characteristics necessary for the excitation light wavelength band reflector 418 can be obtained. For example, Al ₂ O ₃ , HfO ₂ , ZrO ₂ , ThO _{2 and the} like.
The material constituting each low refractive index layer 418a is not particularly limited as long as it can obtain the optical characteristics necessary for the excitation light wavelength band reflector 418. For example, MgF ₂ , SiO _{2 and the} like can be used. Can be mentioned.

If the total number of layers of the high refractive index layer 418b and the low refractive index layer 418a in the excitation light wavelength band reflector 418 can obtain the optical characteristics necessary for the excitation light wavelength band reflector 418, Although not particularly limited, it is preferably 10 layers or more, more preferably 10 to 40 layers.
The excitation light wavelength band reflector 418 composed of the multilayer film as described above has desired characteristics by setting (adjusting) the thickness, the number of layers, and the material of the high refractive index layer and the low refractive index layer. Obtainable.

According to the image display device 30 as described above, excitation light transmitted through the screen 41 without contributing to excitation of the fluorescent material is reflected (returned) toward the screen 41 (fluorescent region 411) to excite the fluorescent material. Can be urged. As a result, it is possible to improve the apparent light emission efficiency (excitation efficiency from excitation light to fluorescence) of the fluorescent material by the excitation light, easily and reliably prevent the lack of color development due to the fluorescence, and display a high-quality image. . Furthermore, since unnecessary excitation light leakage can be prevented, a high-quality image can be displayed without losing color balance even when the excitation light is visible light.
In particular, since the excitation light utilization efficiency is excellent, insufficient color development due to fluorescence in the fluorescent region 411 can be prevented even when the fluorescent region 411 is thin. In addition, by reducing the thickness of the fluorescent region 411, attenuation of visible light (red and blue in this embodiment) in the fluorescent region 411 can be suppressed, and a high-quality image can be efficiently displayed.

Second Embodiment
Next, a second embodiment of the image display device of the present invention will be described.
FIG. 10 is an enlarged plan view of a screen provided in the image display apparatus according to the second embodiment of the present invention, and FIG. 11 is a cross-sectional view taken along line AA in FIG.
The image display apparatus according to the present embodiment is the same as the image display apparatus according to the first embodiment described above except that the configuration of the fluorescent region is different and a microlens array is provided.

Such an image display device includes a first screen 41A instead of the first screen 41 of the first embodiment described above, and a microlens array 417 between the light transmission layer 416 and the reflected excitation light reflector 419. Is provided.
As shown in FIG. 10, the first screen 41 </ b> A is distributed in a large number in plan view, and a plurality of fluorescent regions 411 </ b> A configured to include a fluorescent material and the space between the fluorescent regions 411 </ b> A are filled. A non-fluorescent region 412 that is provided and is substantially free of the fluorescent material.

  Since the first screen 41A has such a configuration, the visible light emitted from the laser light sources 51r and 51b, which are the second light sources, is projected on the non-fluorescent region 412 and colored, and is also the first light source. The excitation light emitted from the laser light source 51v is projected onto the fluorescent region 411A and is colored by fluorescence with a color different from the visible light, and an image is displayed on the first screen 41A. More specifically, red R and blue B are developed in the non-fluorescent region 412 by the laser beams RR and BB, and green G by fluorescence is developed in the fluorescent region 411A by the excitation light VV, so that a full color image is obtained. It is displayed on the first screen 41A.

  As a result, visible light emitted from the laser light sources 51r and 51b as the second light sources is projected onto the non-fluorescent region 412, and thus emits light, so that the use efficiency can be improved by suppressing attenuation of the visible light. Therefore, even if laser light sources 51r and 51b having relatively low emission intensity are used, an image with excellent image contrast and brightness can be displayed. That is, it is possible to display a high-quality image while reducing the cost of the laser light sources 51r and 51b.

Hereinafter, the first screen 41A will be described more specifically.
As shown in FIG. 11, the first screen 41 </ b> A has a large number of fluorescent regions 411 </ b> A spaced from each other on the surface of the screen body 413 on the laser beam L <b> 1 incident side. The region constitutes a non-fluorescent region 412.
A light transmission layer 414, a fluorescent wavelength band reflector (fluorescence reflection layer) 415, a light transmission layer 416, and a microlens array 417 are sequentially stacked in this order on the incident side of the laser beam L1 of the screen body 413. Yes. On the other hand, an excitation light wavelength band reflector (excitation light reflection layer) 418 is provided on the incident side of the screen main body 413 with respect to the laser light L1.

As shown in FIG. 10, each fluorescent region 411A has a dot shape (circular shape) in plan view, and a large number of fluorescent regions 411A are arranged in a lattice shape (square lattice shape) at intervals. .
In addition, the planar view shape of each fluorescent region 411A is not limited to that described above, and may be, for example, a polygon such as a triangle or a quadrangle, or an ellipse.

  The dot-like fluorescent regions 411A provided in such a dispersed manner can be formed relatively easily by using various film forming methods. In particular, an inkjet method is suitably used for forming such a large number of fluorescent regions 411A. In the case where the fluorescent region 411A is formed using an inkjet method, a liquid in which a fluorescent material as described above is dissolved in a solvent or dispersed in a dispersion medium is used. In addition, a liquid repellent treatment is applied to a portion on the screen main body 413 except for a portion where a large number of fluorescent regions 411A are to be formed, and a liquid as described above is applied by various coating methods to form a large number of fluorescent regions 411A. be able to.

  In addition, since a large number of fluorescent regions 411A are regularly arranged in a plan view, even when the dot diameter of each fluorescent region 411A is relatively large, coloring by visible light and coloring by fluorescence are caused uniformly. High-quality images can be displayed. In addition, arrangement | positioning by planar view of many fluorescent region 411A is not limited to what was mentioned above, For example, a houndstooth check pattern may be sufficient and it may be random.

In the present embodiment, the diameter of each fluorescent region 411A is smaller than the spot diameter of the laser beam L1 on the screen 41. In addition, the multiple fluorescent regions 411A are arranged so that approximately six fluorescent regions 411A are included in a spot (that is, one pixel) of laser light (visible light and excitation light) on the screen 41.
Thus, since the diameter of each fluorescent region 411A is smaller than the spot diameter of the laser beam L1 on the screen 41, even if the visible light and the excitation light are combined and simultaneously irradiated to the same region on the screen 41, the fluorescent region While 411A can be irradiated with excitation light, the non-fluorescent region 412 can be irradiated with visible light.

Particularly, since the two or more fluorescent regions 411A are included in the spot of the laser beam L1 on the screen 41, the irradiation position of the visible light and the excitation light on the screen 41 does not require high accuracy. In addition, a high-quality image can be displayed.
The light transmission layer 414 is provided so as to fill between the above-described fluorescent regions 411A and cover each fluorescent region 411A. Such a light transmission layer 414 is made of, for example, glass or resin, and is configured to transmit light of each wavelength of red, blue, green, and blue-violet. And the part between fluorescence area | region 411A among the light transmissive layers 414 comprises the non-fluorescence area | region 412 comprised without including the fluorescent material mentioned above substantially.

The light transmission layer 414 also has a function as a spacer that keeps the distance between each of the fluorescent regions 411A and the fluorescent wavelength band reflector 415 or a microlens array 417 described later at an optimum distance.
Note that the light transmission layer 414 can be omitted. In this case, a gap may be formed between the fluorescent regions 411A, or the fluorescent wavelength band reflector 415 may be brought into close contact with the screen body 413 between the fluorescent regions 411.

In the present embodiment, the light transmission layer 416 is formed so as to fill a gap between a microlens array 417 and a fluorescent wavelength band reflector 415, which will be described later, and has a function of supporting the microlens array 417.
The light transmission layer 416 also has a function as a spacer that keeps the distance between each fluorescent region 411A and a microlens array 417, which will be described later, at an optimum distance.
Note that the light transmission layer 416 can be omitted.

As shown in FIG. 10, the microlens array 417 includes a number of microlenses 417a arranged in a lattice shape so as to correspond to the respective fluorescent regions 411A in plan view. In the present embodiment, each microlens 417a is arranged so that the center thereof coincides with the center of the corresponding fluorescent region 411A in plan view.
Each such microlens 417a condenses excitation light in each corresponding fluorescent region 411A. As a result, it is possible to improve the utilization efficiency of the excitation light, to easily and reliably prevent the shortage of coloring due to fluorescence, and to display a high-quality image.

  A reflected excitation light reflector 419 is provided on the surface of the microlens array 417 thus configured opposite to the light transmission layer 416 (on the incident side of the laser light L1). The positional relationship between the microlens array 417 and the reflected excitation light reflector 419 prevents light reflected by the reflected excitation light reflector 419 from reaching an unintended pixel and improves the use efficiency of the excitation light. At the same time, the color balance of the displayed image can be made excellent.

  According to the image display apparatus according to the second embodiment as described above, the visible light emitted from the laser light sources 51r and 51b as the second light sources is projected onto the non-fluorescent region 412, and thus emits light. Utilization can be improved by suppressing light attenuation. Therefore, even if laser light sources 51r and 51b having relatively low emission intensity are used, an image with excellent image contrast and brightness can be displayed. That is, it is possible to display a high-quality image while reducing the costs of the laser light sources 51r and 51b (and thus reducing the cost of the image display device 30).

The image display device of the present invention has been described based on the illustrated embodiment, but the present invention is not limited to this. For example, in the image display device of the present invention, the configuration of each unit can be replaced with an arbitrary configuration that exhibits the same function, and an arbitrary configuration can be added.
The image display device of the present invention may be a combination of any two or more configurations (features) of the above-described embodiments.

In the second embodiment described above, a large number of dot-like fluorescent regions are dispersed and provided so that the non-fluorescent regions are filled between the fluorescent regions. However, the dot-like non-fluorescent regions are dispersed. And a large number of fluorescent regions may be provided so as to fill the space between the non-fluorescent regions.
In the above-described embodiment, red and blue are colored by the color of light from the light source, and green is colored by fluorescence to display a full-color image. Apply the present invention as long as two colors of green and blue are colored with light from the light source, and colors other than the two colors of red, green, and blue are colored with fluorescence can do.

Further, when displaying a full-color image, only three colors of red, blue, and green are used in the above-described embodiment. However, in addition to these colors, other colors such as cyan are used. A wide color image can also be displayed.
In the above-described embodiment, the display of a full-color image has been described. However, the present invention can be applied as long as an image is displayed using at least two colors.

In the above-described embodiment, the example in which the image display device of the present invention is incorporated in a slot machine has been described. However, the image display device of the present invention is incorporated in a gaming machine other than a slot machine such as a pachinko game machine. It is also possible.
The image display device of the present invention can also be used alone as a display.
In particular, it has very favorable characteristics as a display device such as a signboard.

1 is a perspective view showing an external appearance of a slot machine to which the present invention is applied as a first embodiment of an image display apparatus according to the present invention. FIG. 2 is a longitudinal sectional view for explaining an image display device provided in the slot machine shown in FIG. 1. It is a figure for demonstrating the screen with which the image display apparatus shown in FIG. 2 was equipped, Comprising: (a) is a top view of the 1st screen when the image is not displayed, (b) is (a). Sectional drawing of the 1st screen shown in (c) is a top view which shows an example of the 1st screen when the image is displayed. It is a schematic diagram which shows schematic structure of the light irradiation means with which the image display apparatus shown in FIG. 2 was equipped. It is a figure for demonstrating the optical scanning by the light irradiation means shown in FIG. It is a block diagram which shows schematic structure of the control system of the image display apparatus shown in FIG. It is sectional drawing of the screen with which the image display apparatus shown in FIG. 2 was equipped, and its peripheral part. It is sectional drawing which shows the structure of the fluorescence wavelength band reflector provided in the incident side with respect to the screen shown in FIG. It is sectional drawing which shows the structure of the excitation light wavelength band reflector provided in the output side with respect to the screen shown in FIG. It is an enlarged plan view of a screen provided in an image display device according to a second embodiment of the present invention. It is the sectional view on the AA line in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Slot machine, 11 ... Housing | casing, 11a, 11c ... Panel surface, 11b ... Console, 12 ... Display window, 14a ... Start lever, 14b ... Bet button, 14c ... Coin slot, 16 ... Stop button, 21, 22, 23 ... Spindle reel, 25 ... Motor, 30 ... Image display device, 40 ... Screen device, 41, 41A ... First screen, 41a ... Solid part, 42 ... Second screen, 44 ... First lifting device, 45 2nd lifting device, 50 ... Projector body, 51 ... Light source device, 51r, 51v, 51b ... Laser light source, 52c ... Mirror, 52a1, 52a2, 52a3 ... Collimator lens, 52v, 52b ... Dichroic mirror, 53 ... Optical scanning unit 53a, 53b ... Mirror, 53d, 53e ... Actuator, 55 ... Moving device 60 ... Light guide optical system 80 ... Display control device 81 ... Display control circuit 82 ... Image processing circuit 84 ... Memory device 90 ... Game control circuit 411, 411A ... Fluorescent region, 412 ... Non-fluorescent 413 ... Screen body, 414 ... Light transmission layer, 415 ... Fluorescence wavelength band reflector, 415a ... Low refractive index layer, 415b ... High refractive index layer, 416 ... Light transmission layer, 417 ... Micro lens array, 417a ... Micro 418 ... excitation light wavelength band reflector, 418a ... low refractive index layer, 418b ... high refractive index layer, 419 ... reflected excitation light reflector, A1 ... first region, A2 ... second region, A3 ... third region AX1, AX2 ... rotation axis, EI ... facial expression, DD ... image display area, BB ... blue laser light, VV ... blue-violet laser light, RR ... red laser light, 1, L2 ... laser light, LL ... laser light, PE1, PE2, PE3 ... pixel, TR1, TR2, TR3 ... trajectory

Claims (15)

A screen with a fluorescent region comprising a fluorescent material;
A first light source that emits excitation light capable of exciting the fluorescent material, at least one second light source that emits visible light, and the first light source and the second light source according to image information, respectively. A light irradiating means comprising: a driving means for driving; and a scanning means for scanning light from each of the first light source and the second light source on the screen in a main scanning direction and a sub-scanning direction intersecting therewith. When,
An excitation light wavelength band reflector provided on the light emission side of the light irradiation means with respect to the screen and having a function of reflecting light in the wavelength band of the excitation light toward the screen;
The visible light emitted from the second light source is projected on the screen and diffused and colored, and the excitation light emitted from the first light source is projected onto the fluorescent region to define the visible light. An image display device characterized in that a different color is developed by fluorescence and an image corresponding to the image information is displayed on the screen.   The image display apparatus according to claim 1, wherein the screen has a display area for displaying the image, and the fluorescent area is uniformly formed over substantially the entire area of the display area.   The image display apparatus according to claim 1, wherein the excitation light wavelength band reflector has a function of preventing the excitation light from passing through the screen and leaking outside.   The image display device according to claim 1, wherein the excitation light wavelength band reflector is formed of an optical multilayer thin film.   The light irradiation means includes, as the second light source, two light sources that emit light of two colors of red, green, and blue, respectively, and the fluorescent region is excited by the second light source. 5. The image display device according to claim 1, wherein the image display device is configured to develop a color other than the two colors of red, green, and blue when irradiated with light.   The light irradiation means includes two light sources that respectively emit red and blue light as the second light source, and the fluorescent region emits green light when irradiated with excitation light from the second light source. The image display device according to claim 5, wherein the image display device is configured to develop a color.   The light irradiation means combines the excitation light emitted from the first light source and the visible light emitted from the second light source, and simultaneously irradiates the same area on the screen. The image display device according to claim 1, which is configured.   A reflection excitation light reflector that reflects reflected light of the excitation light from the excitation light wavelength band reflector toward the screen is provided on an incident side of light from the light irradiation unit with respect to the screen. Item 8. The image display device according to any one of Items 1 to 7.   The image display device according to claim 8, wherein the reflection excitation light reflector is configured by a polarizing plate.   On the incident side of the light from the light irradiating means with respect to the screen, the visible light and the excitation light are allowed to transmit, and all or part of the wavelength band of the fluorescence emitted from the fluorescent region is allowed. The image display device according to claim 1, wherein a fluorescent wavelength band reflector having a function of reflecting light is provided.   The image display device according to claim 10, wherein the fluorescent wavelength band reflector is formed of an optical multilayer thin film.   The image display device according to claim 1, wherein the first light source is a laser light source.   The image display device according to claim 1, wherein the screen has a three-dimensional uneven portion.   The image display device according to claim 13, wherein the screen is movable back and forth.   The image display device according to claim 13 or 14, wherein the three-dimensional uneven shape is configured to change dynamically.

Images