JP2021144063A - Eyeglasses type image display device - Google Patents

Abstract

To improve use efficiency of light as achieving miniaturization of an image light output unit.SOLUTION: In an eyeglasses type image display device (eyeglasses type video display device 1) having an image light output unit outputting image light toward a lens surface of eyeglasses, the image light output unit (a video output unit 12) has: a light source unit 121 that emits irradiation light; a display 123 that makes the irradiation light from the light source unit 121 incident, and emits image light; a polarizer 124 that transmits first image light serving as image light made of linear polarization in a first direction of the image light emitted from the display, and reflects linear polarization in a second direction orthogonal to the first direction; a wavelength plate 125 that converts the first image light to circular polarization to emit the circular polarization; and a mirror 126 that reflects the circular polarization and emits the reflected circular polarization in a direction of the wavelength plate 125. The circular polarization reflected by the mirror 126 and incident upon the wavelength plate 125 is emitted from the wavelength plate 125 as second image light serving as image light made of the linear polarization in the second direction, the circular polarization is reflected by the polarizer 124, and is output.SELECTED DRAWING: Figure 2

Description

The present invention relates to a spectacle-type image display device.

Conventionally, a spectacle-type image display device for displaying an image such as an image on the lens surface of spectacles is known (see, for example, Patent Document 1). In the spectacle-type image display device described in Patent Document 1, an image is projected from a direction perpendicular to the lens surface of the spectacles.

Japanese Unexamined Patent Publication No. 2016-131270

In recent years, there has been an increasing demand for miniaturization of display devices from the viewpoint of ease of handling. However, in order for the user to recognize a desired image, it is necessary to secure a constant optical path length between the liquid crystal panel for displaying the image and the user. Therefore, studies are underway to secure an optical path length by using an optical component such as a mirror or a half mirror in the image light output unit having a function of outputting image light, but depending on the type of optical component used, light There was room for improvement, such as a decrease in utilization efficiency.

The present invention has been made in view of the above, and an object of the present invention is to provide a spectacle-type image display device in which light utilization efficiency is improved while realizing miniaturization of an image light output unit.

In order to achieve the above object, the eyeglass-type image display device according to one embodiment of the present invention has an eyeglass-type image display having an image light output unit that outputs image light, which is light including image information, toward the lens surface of the eyeglass. In the device, the image light output unit includes a light source unit that emits irradiation light, a display that receives the irradiation light from the light source unit and emits it as the image light, and the display that emits the irradiation light. Of the image light, a polarizing plate that transmits the first image light, which is an image light composed of linearly polarized light in the first direction, and reflects linearly polarized light in the second direction orthogonal to the first direction, and incident light. By changing the phase by λ / 4, a wavelength plate that converts the first image light into circularly polarized light and emits light is provided on the opposite side of the wavelength plate and the polarizing plate is provided to obtain the circularly polarized light. A second image having a mirror that reflects and emits light in the direction of the wavelength plate, and the circularly polarized light that is reflected by the mirror and incident on the wavelength plate is image light composed of linearly polarized light in the second direction. Light is emitted from the wavelength plate, reflected by the polarizing plate, and output toward the lens surface.

According to the present invention, there is provided a spectacle-type image display device in which the light utilization efficiency is improved while realizing the miniaturization of the image light output unit.

It is a figure which shows typically the spectacles type image display device. It is a figure explaining the structure of the video output part. It is a figure explaining the structure of the video output part which concerns on the modification. It is a figure explaining the structure of the eyeglass type image display device which concerns on a modification. It is a figure which shows the hardware configuration of a control part.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a diagram schematically showing a glasses-type image display device 1 (glasses-type image display device) according to the first embodiment. The spectacle-type image display device 1 is a display device that displays an image (image) on the lens surface of the spectacles so that a user wearing spectacles (hereinafter, simply referred to as “user”) can visually recognize the image. The eyeglass-type image display device 1 causes the user to visually recognize an image by causing the image light (image light) emitted from the image display unit 10 assembled to the temple 52 of the eyeglasses to enter the user's pupil.

The spectacle-type image display device 1 includes a basic configuration of spectacles, and as shown in FIG. 1, a pair of lenses 50 corresponding to both eyes, a bridge 51 for holding the lenses 50 of both eyes, and a bridge 51 for holding the lenses 50 of both eyes. It is provided with a pair of temples 52 that are continuous with the frame that holds the lenses 50 of both eyes and are fixed to the user's temporal region. The lens 50 reflects at least a portion of the incident (projected) image light toward the user's pupil. The image light reflected on the incident surface of the lens 50 forms an image as a virtual image when viewed from the pupil (see FIG. 2). As a result, the user can visually recognize the image. The lens 50 has a thin optical member such as a diffraction grating. The eyeglass-type image display device 1 may have a speaker (not shown) that outputs sound according to the image at a position corresponding to the user's ear on the temple 52.

The glasses-type image display device 1 includes an image display unit 10. The video display unit 10 includes a content storage unit 11, a video output unit 12 (image light output unit), and a control unit 15. Of each configuration of the video display unit 10, the video output unit 12 is arranged on, for example, the temple 52. The spectacle-type image display device 1 has each configuration of the above-mentioned image display unit 10 corresponding to each of the eyes, but since the functions of the configurations corresponding to each of the eyes are the same, the following In the explanation of, only the configuration corresponding to the right eye will be described.

The content storage unit 11 is configured to store content to be visually recognized by the user. The content visually recognized by the user is an image projected on the lens 50 in the present embodiment. An image is an image created by refraction or reflection of light and visually recognized by the user. Specifically, the content visually recognized by the user is a recorded TV program, a movie, or the like, or a moving image recorded by the user. The content storage unit 11 may be arranged on the temple 52 in the spectacle-type image display device 1 as in the other configurations of the image display unit 10, or may be arranged at a position away from the temple 52. ..

The video output unit 12 is configured to output video light (image light), which is light including video information (image information). The video output unit 12 is configured to be able to acquire video from the content storage unit 11 by wire or wireless connection, and emits video light related to the video acquired from the content storage unit 11. The video output unit 12 includes a light source and a display, and the irradiation light emitted from the light source is reflected by the display and output as video light including video information. Details of the video output unit 12 will be described later.

The control unit 15 is a circuit that performs various types of control. The hardware configuration of the control unit 15 will be described later. The control unit 15 outputs a predetermined control signal to the video output unit 12 so that, for example, the video output unit 12 acquires the video from the content storage unit 11 and emits the video light.

Next, the video output unit 12 will be described with reference to FIG. As shown in FIG. 2, the video output unit 12 includes a light source unit 121, a splitter 122, a display 123, a polarizing plate 124, a wave plate 125, and a mirror 126.

The light source unit 121 outputs the irradiation light L1. This irradiation light is not light that includes video information, but light that irradiates the display 123. The light source unit 121 is a laser light source such as an LD (Laser Diode), an LED (Light Emitting Diode), a lamp light source, or the like. The light source unit 121 may be a light source that outputs CW light, pulsed light, or the like as irradiation light. The irradiation light L1 can be in a mode having a specific polarized state. In that case, the light source unit 121 includes the light source and the polarizer, and the light emitted from the light source passes through the polarizer, so that the light is emitted as the irradiation light L1 of linearly polarized light in a specific direction.

The splitter 122 is, for example, a polarization beam splitter (PBS) that transmits polarized light in a specific direction and reflects polarized light in a different direction. The splitter 122 reflects, for example, the irradiation light L1 emitted from the light source unit 121 and transmitted through the polarizer (not shown) toward the display 123. When the irradiation light L1 is not linearly polarized light in a specific direction, the splitter 122 selectively reflects only the linearly polarized light in the specific direction among the irradiation light L1 toward the display 123 side. Further, the splitter 122 has a function of transmitting linearly polarized light whose polarization direction is orthogonal to the irradiation light L1.

The display 123 receives the irradiation light L1 from the light source unit 121 via the splitter 122, converts it into video light including video information (image information), and reflects the converted video light L2 in the direction of the polarizing plate 124 ( Exit). As the display, for example, a display using a liquid crystal display, an organic EL, LCOS (Liquid crystal on silicon) or the like can be adopted. When an organic EL and a transmissive liquid crystal display (using a backride) are used, the above-mentioned splitter 122 (polarizing beam splitter) may not be used.

Further, as the display 123, a display capable of rotating the linearly polarized light of the incident light by 90 degrees can be used. Examples of displays having such characteristics include LCOS displays. In the LCOS display, when a voltage is applied between the liquid crystals, the linearly polarized light of the incident light is rotated by 90 degrees due to the double polarization of the twisted liquid crystals. Therefore, for example, the irradiation light L1 that becomes the incident light is s-polarized light. In this case, p-polarized light orthogonal to s-polarized light is emitted as the image light L2.

The polarizing plate 124 has a function of incident the image light L2 emitted from the display 123 and transmitting the image light L2 in the direction of the wave plate 125. As the polarizing plate 124, a polarizing plate 124 having a function of transmitting polarized light emitted from the display 123 as image light L2 and reflecting polarized light different from the polarized light can be used. The polarizing plate 124 also has a function of reflecting the image light L4 emitted from the wave plate 125 in the direction of the lens 50.

The wave plate 125 is a so-called λ / 4 wave plate, and undergoes a phase change of λ / 4 with respect to the incident light. As a result, the image light L2 is output to the mirror 126 as the image light L3 whose polarization state is changed by λ / 4. Further, it has a function of incident the image light L3 reflected by the mirror 126 and emitting it as the image light L4 whose polarization state is changed by λ / 4.

The mirror 126 is provided on the side opposite to the polarizing plate 124 with the wavelength plate 125 interposed therebetween. The mirror 126 reflects the image light L3 from the wave plate 125 and re-enters the wave plate 125.

In the video output unit 12, the irradiation light L1 from the light source unit 121 is reflected by the splitter 122 and incident on the display 123. Then, the image light L2 whose polarization direction has been changed in the display 123 is emitted from the display 123, transmitted by the splitter 122, transmitted through the polarizing plate 124, and incident on the wave plate 125. The image light L3 whose polarization direction has been changed by the wave plate 125 is emitted from the wavelength plate 125, reflected by the mirror 126, and then incident on the wavelength plate 125 again. Then, the image light L4 whose polarization direction is changed again by the wave plate 125 is emitted from the wavelength plate 125, reflected by the polarizing plate 124, and emitted in the lens 50 direction.

At this time, assuming that the irradiation light L1 incident on the display 123 is s-polarized, the image light L2 is p-polarized. Further, the image light L3 emitted from the wave plate 125 in the direction of the mirror 126 is light whose phase has changed by λ / 4 from p-polarized light, and is circularly polarized light. Further, the image light L4 emitted from the wave plate 125 in the direction of the polarizing plate 124 is s-polarized. That is, when the irradiation light L1 is s-polarized, the image light L4 emitted from the image output unit 12 is also s-polarized.

In the above-mentioned eyeglass-type image display device 1, the arrangement of each optical component can be appropriately set based on the optical path length and the like to be secured in the image output unit 12. For example, when it is desired to secure a longer optical path length, the distance between the polarizing plate 124 and the mirror 126 is increased by arranging the polarizing plate 124 so that the distance between the polarizing plate 124 and the splitter 122 is short. be able to.

The operation and effect of the eyeglass-type image display device 1 according to the present embodiment will be described.

In the spectacle-type image display device 1, as described above, the polarizing plate 124, the wave plate 125, and the mirror 126 are combined with respect to the image light L2 emitted from the display 123 after being emitted from the light source unit 121 to obtain the polarizing plate 124. The image light L4 from is emitted in the lens 50 direction. With such a configuration, the image light L2, L3, and L4 can be reciprocated between the polarizing plate 124 and the mirror 126.

In order to display the image light L2 emitted from the display 123 as a desired image on the lens 50, it is necessary to secure an optical path length of a certain value or more between the display 123 and the lens 50. Therefore, in the conventional eyeglass-type image display device, a mirror or a half mirror or the like is arranged between the display 123 and the lens 50 to secure a constant optical path length. However, since there is a limit to eliminating the distance between the video output unit 12 and the lens 50, an optical element or the like is arranged in the video output unit 12 in order to secure the optical path length.

However, if the optical path length is secured by using a large number of mirrors, the video output unit 12 may become large. For example, if a plurality of mirrors are arranged to secure an optical path while reflecting video light in each mirror, it is necessary to increase the size of the housing of the video output unit 12 in order to arrange the plurality of mirrors. On the other hand, by combining a half mirror and a mirror and reciprocating the image light between the optical paths between the half mirror and the mirror to secure the optical path, it is possible to suppress the increase in size of the housing. Can be done. However, when a half mirror is used, light loss occurs every time video light is incident on the half mirror. Therefore, in the case of using a half mirror, the intensity of the image light emitted from the image output unit 12 toward the lens 50 is lower than the intensity of the image light emitted from the display. There is a possibility that the utilization efficiency of the lens 50 will decrease and the brightness of the image displayed on the lens 50 will not be sufficient.

On the other hand, in the spectacle-type image display device 1 according to the present embodiment, the image light L2 which is the first image light which is the image light composed of the linearly polarized light in the first direction is transmitted, and the linearly polarized light in the second direction is used. By using the polarizing plate 124 that reflects the image light L4 that becomes the second image light, which is the image light, the image light L2 can be transmitted without loss, and the image light L4 can also be reflected without loss. Further, a wave plate 125 that changes the phase of the incident light by λ / 4 is provided between the polarizing plate 124 and the mirror 126. With such a configuration, the polarization direction of the image light L2 transmitted through the wave plate 125 is changed to become the image light L4 while reciprocating between the polarizing plate 124 and the mirror 126, and the polarizing plate 124 It is reflected and emitted in the lens 50 direction. With such a configuration, first, it is possible to prevent the video output unit 12 from becoming large. That is, since the video light can be reciprocated between the polarizing plate 124 and the mirror 126, it is possible to prevent an increase in the size of the device for securing the optical path length of the video light as in the case where a plurality of conventional mirrors are provided. Can be done. Further, by using the polarizing plate 124, it is possible to suppress the loss of light while reciprocating the image light between the polarizing plate 124 and the mirror 126. As described above, since the polarizing plate 124 uses the direction of polarization to control the emission direction like transmission / reflection, it is possible to suppress the loss of light in the incident video light as compared with the half mirror. Can be done. As described above, in the spectacle-type image display device 1 according to the present embodiment, the light utilization efficiency is improved while realizing the miniaturization of the image output unit 12 (image light output unit).

Further, in the above-mentioned glasses-type image display device 1, the irradiation light L1 which is light composed of linearly polarized light in the second direction is emitted from the light source unit 121, and the irradiation light L1 is emitted from the light source unit 121 as an image composed of linearly polarized light in the first direction. It is converted into image light L2, which is light, and emitted. With such a configuration, the image light L2 serving as the first image light can be emitted from the display 123. Therefore, the image light L2 emitted from the display 123 can be emitted to the polarizing plate 124 in the subsequent stage without causing loss in the splitter 122.

Further, by configuring the display 123 to convert the irradiation light L1 to the image light L2, as described above, a polarizing beam splitter that transmits polarized light in a specific direction and reflects polarized light in a different direction is splitter. It can also be used as the 122 to reciprocate the video light between the display 123 and the splitter 122. With such a configuration, the video output unit 12 can be further miniaturized.

Further, in the spectacle-type image display device 1, the image light L4 from the polarizing plate 124 is emitted in the direction of the lens 50. In the spectacle-type image display device 1, the polarizing plate 124 has a function of incident image light L2 emitted from the display 123 and transmitted it in the direction of the wave plate 125, and the image light L4 emitted from the wave plate 125 in the lens 50 direction. Although it also has a function of reflecting to, it is possible to change the direction of the polarizing plate 124 according to the direction in which the image light L4 is emitted. Therefore, since the eyeglass-type image display device 1 can easily change the emission direction of the image light L4, for example, the configuration or arrangement of the image output unit 12 for further miniaturization can be easily changed. Can be done.

Even when the display 123 does not have the above-mentioned characteristics, the splitter 122 transmits only the light in the specific polarization direction (that is, the light corresponding to the above-mentioned image light L2). Light having a specific polarization direction can be emitted to the subsequent polarizing plate 124.

Next, a modified example of the video output unit 12 will be described with reference to FIG. In the video output unit 12A shown in FIG. 3, the splitter 122 has a function as a polarizing plate 124 in the video output unit 12. That is, the image output unit 12A is not provided with the polarizing plate 124. Therefore, the light reflected by the mirror 126 reaches the splitter 122 through the wave plate 125, is reflected by the splitter 122, and is emitted toward the first optical member 13 outside the video output unit 12A.

That is, in the video output unit 12A, the irradiation light L1 from the light source unit 121 is reflected by the splitter 122 and incident on the display 123. Then, the image light L2 whose polarization direction has been changed in the display 123 is emitted from the display 123, transmitted by the splitter 122, and then incident on the wave plate 125. The image light L3 whose polarization direction has been changed by the wave plate 125 is emitted from the wave plate 125, reflected by the mirror 126, and then incident on the wave plate 125. Then, the image light L4 whose polarization direction is changed again by the wave plate 125 is emitted from the wavelength plate 125, reflected by the splitter 122, and emitted in the direction of the first optical member 13.

At this time, assuming that the irradiation light L1 incident on the display 123 is s-polarized, the image light L2 is p-polarized. Further, the image light L3 emitted from the wave plate 125 in the direction of the mirror 126 is light whose phase has changed by λ / 4 from p-polarized light, and is circularly polarized light. Further, the image light L4 emitted from the wave plate 125 in the direction of the polarizing plate 124 is s-polarized. That is, when the irradiation light L1 is s-polarized, the image light L4 emitted from the image output unit 12 is also s-polarized.

At this time, assuming that the irradiation light L1 incident on the display 123 is s-polarized, the image light L2 is p-polarized. Further, the image light L3 emitted from the wave plate 125 in the direction of the mirror 126 is light whose phase has changed by λ / 4 from p-polarized light, and is circularly polarized light. Further, the image light L4 emitted from the wave plate 125 in the direction of the splitter 122 is s-polarized. That is, when the irradiation light L1 is s-polarized, the image light L4 emitted from the image output unit 12 is also s-polarized.

Similarly to the video output unit 12, the video output unit 12A can be prevented from becoming large in size. That is, since the video light can be reciprocated between the splitter 122 that functions as a polarizing plate and the mirror 126, the size of the device for securing the optical path length of the video light is large as in the case where a plurality of conventional mirrors are provided. It is possible to prevent the conversion. Further, by using the splitter 122 that functions as a polarizing plate, it is possible to suppress the loss of light while reciprocating the image light between the splitter 122 and the mirror 126. As described above, since the splitter 122 also controls the emission direction like transmission / reflection by using the direction of polarization as in the polarizing plate 124, it is possible to suppress the loss of light in the incident video light. Can be done. As described above, in the spectacle-type image display device 1 according to the present embodiment, the light utilization efficiency is improved while realizing the miniaturization of the image output unit 12A (image light output unit).

Further, in the video output unit 12A, the splitter 122 has a function as a polarizing plate 124. In other words, the splitter 122, which functions as a polarizing plate, has a function of reflecting the irradiation light L1 as image light composed of linearly polarized light in the second direction from the light source unit 121 and incident on the display 123, and an image reflected by the mirror 126. It has a function of reflecting the image light L4, which is light, and emitting it in the direction of the first optical member 13. With such a configuration, the number of internal optical components can be further reduced as compared with the video output unit 12 having the polarizing plate 124, so that the miniaturization of the device can be further promoted.

Next, a modified example of the spectacle-type image display device 1 will be described with reference to FIG. The eyeglass-type image display device 1A shown in FIG. 4 has a first optical member 13 and a second optical member 14 between the image output unit 12 and the lens 50 as compared with the eyeglass-type image display device 1. There is. That is, in the spectacle-type video display device 1A, an optical member different from the video output unit 12 is provided on the optical path of the video light output from the video output unit 12. The first optical member 13 and the second optical member 14 are included in the image display unit 10 that displays an image on the lens 50. Further, in the spectacle-type image display device 1A, the first optical member 13 and the second optical member 14 are linearly arranged on the temple 52.

In the spectacle-type image display device 1A, image light is emitted from the image output unit 12 in the direction of the first optical member 13. The first optical member 13 receives the video light output from the video output unit 12 and emits the video light. More specifically, the first optical member 13 transmits the video light emitted from the display of the video output unit 12 in the direction of the second optical member 14. The first optical member 13 has a screen or a fly-eye lens having a fine lens pitch. As the screen, for example, a screen having a high resolution used for a rear projection television or the like can be adopted.

The incident surface of the first optical member 13 is the lens 50 so that the distortion of the image in the lens 50 caused by the image light projected obliquely from the second optical member 14 to the lens 50 is suppressed. It is arranged at an angle with respect to the incident surface of. Specifically, in the first optical member 13, the longer the distance from the second optical member 14 to the incident surface of the lens 50, the longer the distance from the image output unit 12 to the incident surface of the first optical member 13. The incident surface is arranged so as to be inclined with respect to the incident surface of the lens 50 so as to be short.

The second optical member 14 has a configuration in which it receives the image light emitted (transmitted) from the first optical member 13 and projects the image light from an oblique direction with respect to the incident surface of the lens 50. The second optical member 14 may be any as long as the angle of the image light emitted from the first optical member 13 can be two-dimensionally changed in the lens 50 direction. For example, various lenses, a galvano mirror scanner, a polygon mirror scanner, and the like. Or a MEMS mirror scanner or the like. The second optical member 14 may be a combination of the various lenses and mirrors described above. Further, the second optical member 14 does not have to physically change the angle of the image light, and is a polarizing element such as an AO element (acoustic optical element) or an EO element (electrical-light conversion element). May be good.

In the above-mentioned eyeglass-type image display device 1A, the first optical member 13 and the second optical member 14 are provided on the optical path of the image light output from the image output unit 12, so that the first optical member 13 and the second optical member 14 are provided. Various corrections related to the image light can be performed by using the second optical member 14. As described above, an optical member for performing correction related to the image light can be provided between the image output unit 12 and the lens 50.

In the spectacle-type image display device 1A shown in FIG. 4, a case where the first optical member 13 and the second optical member 14 are provided on the temple 52 has been described, but these optical members are from the image output unit 12. It suffices if it is provided on the optical path of the output video light, and it is not necessary that it is provided on the temple 52. Further, only one of the first optical member 13 and the second optical member 14 may be provided on the optical path. For example, when the video light cannot be directly reached from the video output unit 12 to the lens 50 (the video light does not reach the lens 50 at the emission angle of the video light from the video output unit 12), the video light reaches the lens 50. In order to make the lens light, the second optical member 14 having a function of changing the angle of the image light may be provided on the optical path.

Although the spectacle-type image display device according to the embodiment of the present invention has been described above, the present invention is not limited to the above configuration and can be appropriately changed.

For example, as an example of the spectacle-type image device, the spectacle-type image display device 1 has been described, and the spectacle-type image display device 1 has been described as displaying an image on the lens surface of the spectacles. Images other than moving images (still images, etc.) may be displayed on the lens surface.

Further, the number and arrangement of the optical components provided in the video output unit (image light output unit) need only satisfy at least the configuration described in the above embodiment, and the optical components are different from the components described in the above embodiment. May be provided in the optical path. The splitter 22 may be replaced by, for example, a polarizing plate or the like.

Further, the configurations of the first optical member 13 and the second optical member 14 in the spectacle-type image display device 1 can be appropriately changed. Further, optical members different from the first optical member 13 and the second optical member 14 may be arranged on the optical path, and the arrangement and number of the optical members can be appropriately changed.

(others)
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly by two or more physically and / or logically separated devices. (For example, wired and / or wireless) may be connected and realized by these a plurality of devices.

For example, the control unit 15 in the eyeglass-type video display device 1 according to the embodiment of the present invention may function as a computer that processes the message delivery control device of the present embodiment. FIG. 5 is a diagram showing an example of the hardware configuration of the control unit 15 according to the above embodiment. The control unit 15 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

Each function in the control unit 15 causes the processor 1001 to perform an operation by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication by the communication device 1004, the memory 1002, and the storage 1003. It is realized by controlling the reading and / or writing of data.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, and / or data from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, each function of the control unit 15 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be mounted on one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to carry out the musical instrument sound recognition method according to the above embodiment.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium that includes memory 1002 and / or storage 1003.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. Bus 1007 may be composed of a single bus, or may be composed of different buses between devices.

Further, the control unit 15 includes hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured, and the hardware may realize a part or all of each functional block. For example, processor 1001 may be implemented on at least one of these hardware.

Although the present invention has been described in detail above, it is clear to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as an amended or modified embodiment without departing from the spirit and scope of the present invention determined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

The order of the processing procedures of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described herein present elements of various steps in an exemplary order, and are not limited to the particular order presented.

The input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

Each aspect / embodiment described herein may be used alone, in combination, or switched with execution. Further, the notification of the predetermined information (for example, the notification of "being X") is not limited to the explicit one, and may be implicitly (for example, the notification of the predetermined information is not performed). good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted.

Further, software, instructions, and the like may be transmitted and received via a transmission medium. For example, the software uses wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave to websites, servers, or other When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.

The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described herein and / or the terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings.

Further, the information, parameters, etc. described in the present specification may be represented by an absolute value, a relative value from a predetermined value, or another corresponding information. ..

The names used for the above parameters are not limited in any way. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed herein.

The phrase "based on" as used herein does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first", "second" as used herein does not generally limit the quantity or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

As long as "including", "comprising", and variations thereof are used within the scope of the present specification or claims, these terms are as comprehensive as the term "comprising". Intended to be targeted. Furthermore, the term "or" as used herein or in the claims is intended not to be an exclusive OR.

A plurality of devices are also included herein unless it is shown in the context or technically that there is only one device.

1,1A ... Glasses-type image display device (glasses-type image display device), 12, 12A ... Video output unit (image light output unit), 13 ... First optical member, 14 ... Second optical member, 50 ... Lens, 121 ... Light source unit, 122 ... Splitter, 123 ... Display, 124 ... Polarizing plate, 125 ... Wave plate, 126 ... Mirror.

Claims (3)

An eyeglass-type image display device having an image light output unit that outputs image light, which is light including image information, toward the lens surface of the eyeglasses.
The image light output unit is
A light source that emits irradiation light and
A display that receives the irradiation light from the light source unit and emits it as the image light.
Of the image light emitted from the display, the first image light, which is an image light composed of linearly polarized light in the first direction, is transmitted, and the linearly polarized light in the second direction orthogonal to the first direction is reflected. With a polarizing plate
A wave plate that converts the first image light into circularly polarized light and emits it by changing the phase of the incident light by λ / 4.
A mirror provided on the opposite side of the polarizing plate with the wavelength plate interposed therebetween, reflecting the circularly polarized light and emitting the light toward the wavelength plate.
Have,
The circularly polarized light reflected by the mirror and incident on the wave plate is emitted from the wave plate as second image light which is image light composed of linearly polarized light in the second direction, and is reflected by the polarizing plate to be reflected by the polarizing plate. A glasses-type image display device that outputs toward the lens surface. The light source unit emits light composed of linearly polarized light in the second direction as the irradiation light.
The spectacle-type image display device according to claim 1, wherein the display incidents the irradiation light and emits the first image light as the image light. The spectacle-type image display device according to claim 2, wherein the polarizing plate reflects the irradiation light from the light source unit and causes it to enter the display.

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