JPH0887283A - Karaoke system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a karaoke system that allows a singer to simultaneously view and sing lyrics while viewing the direction of the audience using holograms and the like. [Structure] In a karaoke system including an accompaniment playing section and a lyrics screen display section for lyrics, etc., a head-up display is used for the lyrics screen display section to combine the light flux from the display device D and the light flux from the audience A. By using the holographic combiner 2 as a light flux combining optical element that presents a composite image of both to the singer S, it becomes possible for the singer S to see the lyrics at the same time while observing the direction of the audience A and sing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke system, and more particularly to a karaoke system which allows a singer to simultaneously view and sing lyrics while looking at the direction of the audience using holograms and the like.

[0002]

2. Description of the Related Art Karaoke systems are laser discs,
The lyrics screen supplied from a CD-ROM, computer graphic, communication line, etc., and the accompaniment corresponding thereto are supplied to the TV screen and the speaker, respectively, and the singer sings a song in accordance with the accompaniment while watching the lyrics screen displayed in sequence. It is something that the person and the audience will enjoy.

[0003]

By the way, in the conventional karaoke system, as shown in FIG. 8, the lyrics screen display of a television or the like is installed on the side (D ₁ ) or the hand (D ₂ ) of the singer S. , The singer S could not look at the lyrics and sing while facing the direction of the audience A.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to make a karaoke song in which a singer can simultaneously see and sing the lyrics while viewing the direction of the audience by using a hologram or the like. It is to provide a system.

[0005]

A karaoke system of the present invention which achieves the above object is a karaoke system having an accompaniment playing section and a lyrics screen display section for lyrics or the like, wherein a head-up display is used for the lyrics screen display section. It is characterized by having done.

In this case, a half mirror or a holographic combiner can be used as the light beam combining optical element of the head-up display. When a holographic combiner is used, it has oblique incidence, oblique diffraction characteristics, oblique incidence, and vertical diffraction. Any of the characteristics can be used.

Further, a holographic combiner having a magnifying and imaging characteristic can be used, and in that case, the distance between the holographic combiner and the display screen of the lyrics display section, and the holographic of light from the display screen. It is desirable to provide a mechanical or optical mechanism that variably adjusts at least one of the incident angles to the combiner.

[0008]

In the present invention, in the karaoke system, since the head-up display is used for the lyrics screen display portion, the singer can simultaneously sing and see the lyrics while looking at the direction of the audience.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The karaoke system according to the present invention will be described below based on several embodiments. FIG. 1 is a diagram showing a configuration and an operation of a main part of the karaoke system of the first embodiment. This embodiment is characterized in that a holographic combiner for a head-up display having a light flux combining function is used. It is a thing. In FIG. 1, this karaoke system has a pedestal 1, a display device D such as a CRT or LCD is arranged facing upward on the pedestal 1, and stands up at the front end of the pedestal 1. An arm a is attached, and a holographic combiner 2 is attached above the display device D at an end of the arm a obliquely with respect to the display surface. In addition, a video image of a laser disk reproducing device (not shown) is displayed on the display device D.
An accompaniment playback device is connected, a speaker is connected to this video / accompaniment playback device, and the accompaniment is played back in synchronization with the lyrics screen. Furthermore, a microphone is connected to this video / accompaniment playback device. The song of the singer S is made loud from the speaker over the accompaniment.

As described above, the holographic combiner 2 is composed of a hologram having a light flux combining function, and is photographed with an optical arrangement as shown in FIG. 2, for example. Figure 2
In FIG. 3, a hologram sensitizer 7 such as a photopolymer is applied on the transparent substrate 6, and a mirror 8 is provided on one side thereof (the hologram sensitizer 7 side in the figure, but it may be the opposite side). , The non-reflective glass plate 9 is superposed on the other side through the index matching liquid 10, respectively, and the parallel laser light 5 from the laser 3 expanded by the beam expander 4 is obliquely incident from the non-reflective glass plate 9 side. Then, the incident light and the reflected light reflected by the mirror 8 on the back surface are made to interfere in the hologram sensitizer 7 and an image is taken. The holographic combiner 2 is the same as the hologram taken in this way.
However, as shown in FIG. 3, it is desirable to perform antireflection processing 16 such as sticking an antireflection glass plate on both surfaces (FIG. (A)) or one surface (FIG. B) thereof. When the anti-reflection processing 16 is performed on one surface, it may be performed on the incident surface side of the hologram or on the opposite surface (in the case of FIG. 3B, the incident surface side).

When such a holographic combiner 2 is used, as shown in FIG. 1, the display light traveling upward from the display device D showing the lyrics screen is moved by the holographic combiner 2 along the line of sight of the singer S. The diffracted light is diffracted into light incident on the eyes of S, and the diffracted light forms a mirror image lyrics screen 20 of the display device D as a virtual image in front of the line of sight of the singer S and behind the holographic combiner 2. The singer S can read the lyrics while observing the display image 20 with the audience and sing along with the accompaniment.
Holographic combiner 2 with no audience A
You can listen to the song while watching the face of singer S through.

In this case, the display image 20 is in the same size relationship with the display device D, and the distance L from the holographic combiner 2 to the display image 20 is equal to the distance L from the holographic combiner 2 to the display device D. Further, the incident angle and the diffraction angle to the holographic combiner 2 are 45 ° in the case of the illustrated example, and therefore, at the time of photographing,
Similarly, the incident angle of the parallel light 5 on the hologram sensitizer 7 is 45 °.
Is. However, at this time, the wavelength of the laser light at the time of photographing is equal to the wavelength of the reproduction light.

The above holographic combiner 2
Is a Lippmann hologram that diffracts light of a specific wavelength, and since the diffraction efficiency at that wavelength is 80% or more, extremely bright display can be performed. In this case, the light of other wavelengths is transmitted by the holographic combiner 2 with almost no attenuation, so that the singer S and the audience A do not need to feel the presence of the holographic combiner 2 much. The display device D may be a monochrome display or a white display that includes light having a wavelength diffracted by the holographic combiner 2. However, the holographic combiner 2 is a multiple recording device that similarly diffracts a plurality of wavelengths, or When a plurality of similar holograms having different diffraction wavelengths are stacked, a color display may be used.

Of course, a half mirror may be used instead of the holographic combiner 2 in the above. However, in that case, compared with the case where the holographic combiner 2 is used, the lyrics are difficult to read, and the presence thereof is conspicuously inferior.

Now, in the case of the arrangement of FIG. 1, in order to prevent the light from the display device D from being reflected by the front and back surfaces of the holographic combiner 2 to become noise light, which makes it difficult to see the display image 20, Although it is necessary to perform the antireflection processing 16 as shown in FIG. 3 on both sides or one side, a second embodiment which does not necessarily require such antireflection processing 16 will be described below.

FIG. 4 is a diagram showing the structure and operation of the main part of the karaoke system of this embodiment. In this case, the holographic combiner 2'is arranged perpendicular to the line of sight of the singer S, and the display device D is used. Is obliquely arranged on the base 1 and obliquely below the holographic combiner 2'so that its display surface faces the holographic combiner 2 '. Therefore, the light R emitted from the display device D and reflected by the front and back surfaces of the holographic combiner 2 is used.
Is reflected obliquely upward, does not move in the direction of the singer S, and does not become noise light. Therefore, the surface of the holographic combiner 2'is not necessarily subjected to antireflection processing.

In this case as well, the holographic combiner 2'is arranged so that the display light traveling obliquely upward from the display device D is incident on the singer S's eyes along the line of sight of the singer S perpendicular to the holographic combiner 2 '. This diffracted light is formed in front of the singer's line of sight and behind the holographic combiner 2 ′ as a virtual image of the display image 20 which is a mirror image of the display device D. The display image 20 is the display device D.
The distance L from the holographic combiner 2'to the display image 20 is equal to the distance L from the holographic combiner 2'to the display device D. The incident angle on the holographic combiner 2'is 45 °, and the diffraction angle is 90 ° (vertical).

To make such a holographic combiner 2 ', as shown in FIG. 5, a hologram substrate 7 such as a photopolymer is coated on a transparent substrate 6, and a non-reflective glass plate 9 is provided on both sides thereof. 9 is the refractive index matching liquid 1
The laser beams are overlapped with each other through 0, and the parallel laser light 5 emitted from the laser 3 and split by the half mirror 11 and expanded by the beam expander 4 is obliquely incident from one side thereof, and from the other side, A parallel laser beam 5 ', which is another split laser beam and is expanded by another beam expander 4 through mirrors 12 and 12, is vertically incident, and both beams 5 and 5'interfer in the hologram sensitizer 7. Then, the image is taken (the position of the hologram sensitizer 7 with respect to the transparent substrate 6 may be opposite to that in the figure). In this embodiment, the hologram thus photographed may be used as it is as the holographic combiner 2 '. Of course, as shown in FIG. 3, antireflection processing 16 such as sticking an antireflection glass plate to both surfaces (FIG. (A)) or one surface (FIG. B) may be performed. Note that FIG.
In the case of the holographic combiner 2 ′ having such an arrangement, the incident angle of the parallel light 5 on the hologram sensitizer 7 is 45 °.

1 and 4, the distance from the holographic combiner 2 or 2'to the display image 20 is equal to the distance from the holographic combiner 2 or 2'to the display device D. . In such an arrangement, the position of the display image 20 is 10 cm to 1 in front of the holographic combiner 2 or 2 '.
m, which causes a deviation between the focus position of the eye for reading the display image 20 formed by the holographic combiner 2 or 2'and the focus position for viewing the audience,
The lyrics are hard to read. Therefore, in the third embodiment, as shown in FIG.
4, the distance L ′ from the holographic combiner 2 ″ to the display image 20 in the arrangement of FIG.
From the holographic combiner 2 ″ to the display device D
It is made larger (for example, 5 times) than the distance L to.

In order to create the holographic combiner 2 "having the function of enlarging the image-forming position, the hologram may be photographed in the arrangement shown in FIG. 7. That is, the non-reflective glass plate 9 and the refractive index matching. From one side of the photosensitive plate formed by superimposing the liquid 10, the hologram sensitizer 7, the transparent substrate 6, the refractive index matching liquid 10, and the non-reflective glass plate 9, the laser 3 is emitted and divided by the half mirror 11, and the lens 1
The laser light 15 which has become a divergent light through 3 and the pinhole plate 14 is made to enter so that its principal ray becomes oblique,
From the other side, another laser beam 15 ', which is another split laser beam and becomes a divergent beam through another lens 13' and a pinhole plate 14 ', has its chief ray made vertical. And both lights 15 and 15 ′ interfere with each other in the hologram sensitizer 7. At this time, the distance between the divergent point of the divergent light 15 (pinhole plate 14) and the hologram sensitizer 7 is T, and the divergent point of the divergent light 15 '(pinhole plate 14') and the hologram sensitizer. If the distance between 7 is T ', the optical system is arranged so as to satisfy the relationship of T'> T.

When the hologram imaged in such an arrangement is used as the holographic combiner 2 ", T'is
The display image 20 is formed satisfying the relationship of / T = L '/ L, and there is no deviation between the focus position for reading the display image 20 and the focus position for viewing the audience. ,
The manuscript becomes easier to read. It should be noted that the ratio d '/ d between the size d of the display device D and the size d'of the display image 20 is also equal to T' / T or L '/ L, which in this case is enlarged. Since the display image 20 is formed at a distance, the image is enlarged and displayed.

Specifically, a hologram recording film Omnidex (trademark) 352 film manufactured by DuPont, Inc. in the United States was attached onto a transparent substrate such as a glass plate, an acrylic plate, a polycarbonate plate, and the optical shown in FIGS. 2, 5 and 7. Holographic recording was performed using the system. Recording wavelength is 514.5
nm, the exposure energy was 30 mJ / cm ² . After recording, the exposed sensitizer is 100 mJ / cm ² with an ultra-high pressure mercury lamp.
After the post-exposure, a heat-sensitive treatment was performed at 120 ° C. for 20 minutes.

When the completed hologram was incorporated into the karaoke system shown in FIGS. 1, 4 and 6 as the holographic combiners 2, 2 ', 2 ", a good display image 20 could be obtained.

Further, in order to perform color display, Du, USA
Film for hologram recording made by Pont Inc. Omnidex
(Trademark) 706 film using the same optics,
Blue 457.9 nm, green 545 nm, red 647.9 nm
When three holograms (each of Ar, Dye, and Kr laser) were created, and the three holograms were superposed and incorporated as holographic combiners 2, 2 ′, 2 ″, similarly good color display image 20 was obtained. I was able to.

By the way, as shown in FIG. 7, the holographic combiner 2 ″ formed by diverging light from both sides of the hologram sensitizer is used as a holographic combiner 2 ″ from the holographic combiner 2 ″ to the display device D. Even if the distance L'from "" to the display image 20 differs from the design value, the image 20 of the display device D can be formed while satisfying the conjugate relation of the image formation within a certain range before and after the design value. Even if the incident angle from the to the holographic combiner 2 ″ differs from the design value, the image 20 of the display device D can be formed while changing the diffraction direction according to the incident angle before and after the angle. Therefore, for example, in FIG.
In such an arrangement, a mechanical mechanism or an optical mechanism for variably adjusting the distance L from the holographic combiner 2 ″ to the display device D, and an incident angle of light from the display device D to the holographic combiner 2 ″ are variably adjusted. By providing a mechanical mechanism or an optical mechanism for controlling the display image 20
Distance L'from holographic combiner 2 ",
The angle viewed from the singer S can be freely adjusted.
As such a mechanical mechanism, for example, there is a mechanical mechanism that makes it possible to mechanically adjust the distance and the relative angle between the holographic combiner 2 ″ and the display device D, and the optical mechanism is a holographic combiner. 2 ″ and a display device D are provided with a positive lens or a negative lens and the position of the optical axis direction or the direction orthogonal to the optical axis is made variable, and the holographic combiner 2 ″ of the image of the display device D by the lens is arranged. To the holographic combiner 2 ″ and the display device D. A mechanism for adjusting the distance and relative angle to the holographic combiner 2 ″ and a display device D. There is a mechanism in which a reflecting mirror is arranged so that the distance and the relative angle of the display device D with respect to the holographic combiner 2 ″ can be adjusted.

In the above embodiment, the display device D is the singer S.
However, the same is true even if it is installed on the side surface of the singer S. Further, the incident angle and the diffraction angle to the holographic combiners 2 and 2 ′ are 45 °, 45 °, and 90 °, respectively, but these angles are merely examples, and it goes without saying that other angles can be set. Yes.

Although the karaoke system of the present invention has been described above based on some embodiments, the present invention is not limited to these embodiments and various modifications can be made.

[0028]

As is apparent from the above description, according to the karaoke system of the present invention, since the head-up display is used for the lyrics screen display portion in the karaoke system, the singer simultaneously listens to the lyrics while looking at the direction of the audience. You will be able to see and sing.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and an operation of a main part of a karaoke system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an optical arrangement for photographing the holographic combiner of FIG.

3 is a cross-sectional view of the holographic combiner of FIG.

FIG. 4 is a diagram showing a configuration and an operation of a main part of the second embodiment.

5 is a diagram showing an optical arrangement for photographing the holographic combiner of FIG.

FIG. 6 is a diagram showing a configuration and an operation of a main part of the third embodiment.

7 is a diagram showing an optical arrangement for photographing the holographic combiner of FIG.

FIG. 8 is a diagram showing a configuration and an operation of a main part of a conventional karaoke system.

[Explanation of symbols]

 S ... Singer A ... Audience a ... Arm D ... Display device 1 ... Stand 2, 2 ', 2 "... Holographic combiner 3 ... Laser 4 ... Beam expander 5, 5' ... Parallel laser light 6 ... Transparent substrate 7 ... Hologram feeling Agent 8 ... Mirror 9 ... Antireflection glass plate 10 ... Refractive index matching liquid 11 ... Half mirror 12 ... Mirror 13, 13 '... Lens 14, 14' ... Pinhole plate 15, 15 '... Divergent laser light 16 ... Antireflection processing 20 ... Display image

Claims (7)

[Claims] 1. A karaoke system comprising an accompaniment playing section and a lyrics screen display section for lyrics and the like, wherein a head-up display is used for the lyrics screen display section. 2. The karaoke system according to claim 1, wherein a half mirror is used as the light flux combining optical element of the head-up display. 3. The karaoke system according to claim 1, wherein a holographic combiner is used as the light flux combining optical element of the head-up display. 4. The karaoke system according to claim 3, wherein the holographic combiner has oblique incidence and oblique diffraction characteristics. 5. The karaoke system according to claim 3, wherein the holographic combiner has oblique incidence and vertical diffraction characteristics. 6. The karaoke system according to claim 3, wherein the holographic combiner has an enlarged image forming characteristic. 7. A mechanical device capable of variably adjusting at least one of a distance between the holographic combiner and a display screen of the lyrics display unit and an incident angle of light from the display screen to the holographic combiner. 7. The karaoke system according to claim 6, further comprising an optical mechanism.