JP4403769B2 - Image display device - Google Patents

Description

  The present invention relates to an image display apparatus, and more particularly to a technique of an image display apparatus that displays an image by scanning a laser beam modulated in accordance with an image signal.

  Conventionally, there has been proposed an image display device that displays an image by scanning a laser beam modulated according to an image signal. When laser light modulated according to an image signal is used, the black color of the image is displayed by stopping the supply of the laser light. If the supply of laser light is stopped and black can be displayed, the contrast can theoretically be made infinite, so that a high-contrast image can be displayed. Further, since the laser beam has high directivity, it is possible to simplify the projection optical system or to dispense with the projection optical system. Therefore, the image display device can be made small and simple. Furthermore, a color image can be easily displayed by using red laser light, green laser light, and blue laser light. Since laser light has high monochromaticity, it is possible to display a color image with high color purity.

  When an image is displayed using laser light, the image display device needs to be configured to ensure the safety of the observer according to the safety standard for each laser intensity. As a technique for ensuring the safety of the image display device, for example, there is one proposed in Patent Document 1.

JP 2002-6397 A

  However, the technique proposed in Patent Document 1 performs control to cut off the output of laser light when the sensor senses that there is an object near the projection lens. If it is necessary to go through a complicated control path in order to ensure safety in this way, it is conceivable that the laser beam cannot be interrupted when the control path fails. If the laser beam cannot be blocked due to a failure in the control path, a situation may occur in which a high-intensity laser beam is incident on the observer's eye. Therefore, according to the technique of Patent Document 1, there is a problem that the safety of the observer may not be ensured.

  Further, the greater the spatial distance from the scanning unit to the position of the observer, the more the intensity of the laser light scanned at the position of the observer is dispersed, and the intensity of the laser light incident on the pupil is reduced. For this reason, it is considered that safety can be ensured without using a complicated control path or the like by covering the spatial region from the position of the scanning unit to a position where the intensity of the laser beam is sufficiently low with a casing. However, if the casing covers from the position of the scanning unit to a position where the intensity of the laser light is sufficiently dispersed, the casing needs to be increased in length in the laser light emission direction. Accordingly, there is a problem that the image display device becomes large due to the large casing, although there is an advantage that the image display device can be downsized by using the laser beam.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an image display device that is small and can ensure the safety of an observer.

  In order to solve the above-described problems and achieve the object, according to the present invention, a light source unit that supplies beam-shaped light, a scanning unit that scans light from the light source unit in a two-dimensional direction, and a light source unit A light or a modulation unit that modulates light scanned by the scanning unit according to an image signal, an optical path conversion unit that converts an optical path of light from the scanning unit, at least a light source unit, a scanning unit, and an optical path conversion unit An image display device that displays an image formed by modulated light, the light having its optical path converted by the optical path conversion unit being transmitted to the casing. An emission part that emits to the outside is formed, and the emission part is provided at a position where light scanned by the scanning part is incident in a predetermined region with an intensity of at least a predetermined value or less. At a position away from the scanning unit by a predetermined distance The area of the inspection region is provided at a position that is larger than the area of another scanning region at a position away from the scanning unit by a predetermined distance when the optical path conversion unit is not provided. An image display device can be provided.

  When the laser beam is scanned, the intensity of the laser beam is dispersed over the entire region in the two-dimensional direction scanned by the laser beam. When the laser beam directly scans the position of the observer's pupil, the intensity of the laser beam is distributed over the entire two-dimensional scanning region at the pupil position. Then, a laser beam having an intensity corresponding to the pupil region with respect to the entire scanning region of the laser beam is incident on the pupil. In the image display device of the present invention, the emission unit is provided at a position where the laser beam to be scanned is incident at an intensity of at least a predetermined value or less in a pupil region that is a predetermined region. Here, the predetermined value of the intensity of the laser beam is set to an intensity at which the eye can be protected by an aversive reaction such as blinking and the safety can be ensured even when the scanning laser beam is incident on the pupil. When the emission part is provided in this way, the spatial region where the intensity of the laser beam is concentrated to such an extent that the eye can not be sufficiently protected by the scanning laser beam is the scanning part side from the emission part, that is, Sealed inside the housing. Also, outside the housing, the intensity of the laser beam is dispersed to the extent that the eye can be protected even when the scanning laser beam is incident on the observer's eyes, and a complicated control path is used. Safety can be secured without it.

  In the image display device of the present invention, the optical path of the light from the scanning unit is converted to the direction of the emission unit by the optical path conversion unit. Here, it is assumed that the laser light is incident on the region of the optical path conversion unit at an angle that is largely skewed. When the laser beam is incident at a greatly skewed angle, the laser beam scans a wide area on the optical path conversion unit. The optical path of the laser beam is bent in a wide area on the optical path conversion unit. As described above, the area of the scanning region of the light passing through the optical path conversion unit at a position away from the scanning unit by a predetermined distance can be sized according to the region of the optical path conversion unit. On the other hand, when the optical path is not converted without providing the optical path conversion unit, the area of the scanning region only increases in proportion to the distance from the scanning unit. Therefore, when the laser beam is configured to pass through the optical path conversion unit, the area of the scanning region at a position away from the scanning unit by the same predetermined distance can be increased as compared with the case where the optical path conversion unit is not provided.

  In this way, by providing the optical path conversion unit, it is possible to enlarge the scanning region of each color light at the position of the emission unit regardless of the length of the optical path from the scanning unit to the emission unit. Since the area of the scanning region of the laser beam does not depend on the length of the optical path, the spatial distance from the scanning unit to the optical path conversion unit and from the optical path conversion unit to the emission unit can be reduced. Therefore, the area | region of an injection | emission part can be enlarged using a small housing | casing. Moreover, since the area | region of an injection | emission part can be enlarged, an injection | emission part can be provided in the position which can ensure safety. Thereby, it is possible to obtain a small-sized image display device that can ensure safety.

  According to a preferred aspect of the present invention, the display unit includes a display unit provided on the emission side of the emission unit, and a reflection unit provided on the surface of the display unit on the emission unit side. The reflection unit and the emission unit are movably provided at a first position where the reflection unit and the emission unit overlap each other, and a second position where the reflection unit and the emission unit form a predetermined angle. It is desirable to reflect the light from the emitting part when it is at position 2.

  When the display unit is in the second position where the reflection unit and the emission unit form a predetermined angle, the light from the emission unit can be reflected from the reflection unit in the direction of the screen or the like. In this way, an image can be displayed on a screen or the like. Further, the display unit can be configured to display an image separately from the image displayed on the screen or the like. Thereby, an image display device capable of displaying an image on the screen or the like and the display unit can be obtained.

  According to a preferred aspect of the present invention, it is desirable that the display unit displays at least one of an image and another image with light other than the light from the scanning unit.

  By adopting a configuration in which an image is displayed on the display unit by light other than light from the scanning unit, image display on a screen or the like and image display on the display unit can be performed simultaneously. When the same signal as the image signal used for image display on a screen or the like is used for image display on the display unit, substantially the same image can be displayed simultaneously on the screen or the like and the display unit. In addition, by using a signal other than the image signal used for image display on the screen or the like for image display on the display unit, an image different from the image such as the screen can be displayed simultaneously on the screen or the like. . Thereby, an image display device capable of simultaneously viewing the same or different images on the screen or the like and the display unit can be obtained.

  As a preferred aspect of the present invention, it is desirable that the display unit displays an image with light scanned by the scanning unit when the display unit is at the first position.

  When the display unit is at the first position, an image is displayed on the display unit by light scanned by the scanning unit. Further, when the display unit is at the second position, an image is displayed on a screen or the like by light scanned by the scanning unit. In this way, by moving the position of the reflecting portion, it is possible to switch between image display on a screen or the like and image display on the display portion. Furthermore, since it is possible to switch between image display on a screen or the like and image display on the display unit, an image can be displayed on the screen or the like and the display unit using light from a single light source unit. Since light from a single light source unit can be used, the image display device can also have a simple configuration. Thus, an image display device that can be viewed with a simple configuration by switching the image display between the screen and the display unit can be obtained.

  As a preferred aspect of the present invention, it is desirable that the display unit displays an image by transmitting light from the scanning unit. The light scanned by the scanning unit is modulated according to the image signal. Thereby, an image can be displayed on the display unit.

  As a preferred aspect of the present invention, it is desirable that the display unit displays an image by emitting light according to the amount of light from the scanning unit. The display unit emits light in accordance with the amount of control light. The light scanned by the scanning unit is modulated according to the image signal. For this reason, when the light from the scanning unit is used as the control light, the drive of the display unit can be controlled in accordance with the image signal (optical addressing). Thereby, an image can be displayed on the display unit.

  In a preferred aspect of the present invention, the reflection unit is a reflection / transmission film that reflects and transmits light from the emission unit according to an incident angle of light from the emission unit. It is desirable to transmit the light from the emission part when the is at the first position and to reflect the light from the emission part when the display part is at the second position.

  When the display unit is in the first position and the reflection / transmission film and the emission unit overlap, the reflection / transmission film transmits light from the emission unit. Since the reflection / transmission film transmits the light from the emission unit, it is possible to display an image on the display unit using the light from the scanning unit. Further, when the display unit is in the second position and the reflection / transmission film and the emission part form a predetermined angle, the reflection / transmission film reflects light from the emission part. The reflection / transmission film reflects the light from the emitting portion in the direction of the screen or the like, so that an image can be displayed on the screen or the like. Thereby, an image display device that can be viewed by switching the image display on the screen or the like and the display unit can be obtained.

  As a preferable aspect of the present invention, the reflective / transmissive film has a light amount reflected when the display unit is in the second position, and a light amount transmitted when the display unit is in the first position. It is desirable to have characteristics that increase compared to the other.

  When an image is displayed by irradiating a screen or the like with laser light, an observer observes reflected light on the screen or the like. On the other hand, when an image is displayed on the display unit, the observer observes the image by directly viewing the light from the display unit. For this reason, compared with the case where an image is displayed on the display unit, the case where an image is displayed on a screen or the like is more susceptible to the influence of ambient brightness. If the difference between the brightness of the display image and the brightness of the screen or the like is small, the image of the screen or the like becomes unclear. On the other hand, if laser light having an intensity necessary for displaying an image on a screen or the like is used as it is for image display on the display unit, the image may become unclear because the amount of light is too large. Therefore, when laser light from a single light source unit is used, it is necessary to adjust the intensity of the laser beam when displaying an image on a screen or the like and when displaying an image on the display unit.

  Therefore, a reflection / transmission film is provided so that the amount of light reflected when the display unit is at the second position is larger than the amount of light transmitted when the display unit is at the first position. For example, when laser light is transmitted through the reflection / transmission film, only a part of the incident laser light is transmitted. And when reflecting a laser beam with a reflective permeation | transmission film | membrane, it is set as the structure which reflects substantially all of the incident laser beam. In this way, the amount of laser light when displaying an image on a screen or the like can be made larger than when displaying an image on the display unit. Thereby, the image of a display part and images, such as a screen, can be displayed with appropriate light quantity.

  Furthermore, according to the preferable aspect of this invention, it has a sensor which detects the position of a display part, and when a sensor detects that a display part exists in a 1st position, a light source part is beam-shaped to supply. When the light amount is set to the maximum value and the sensor detects that the display unit is in the second position, the light source unit preferably sets the light amount of the beam-shaped light to be supplied to a value smaller than the maximum value. .

  When the sensor detects that the display unit is in the second position, the amount of laser light is maximized. At this time, an image can be displayed on a screen or the like using the maximum amount of laser light. Further, when the sensor detects that the display unit is at the first position, the amount of laser light is set to a value smaller than the maximum value. At this time, it is possible to display an image on the display unit using a laser beam having a light amount smaller than that for displaying an image on a screen or the like. Thereby, the image of a display part and images, such as a screen, can be displayed with appropriate light quantity. Furthermore, by adopting a configuration in which the amount of laser light from the light source unit is adjusted, laser light that does not contribute to image formation can be reduced.

  Moreover, as a preferable aspect of the present invention, the optical path conversion unit is preferably a reflection mirror that reflects light from the scanning unit. When a reflection mirror is provided as the optical path conversion unit, the optical path can be converted by reflecting light from the scanning unit. In particular, when the laser beam is incident on the reflection mirror region at a greatly skewed angle, the scanning region of the laser beam after the optical path is converted can be enlarged. For this reason, even if it does not use a large sized housing | casing, the scanning area | region of the two-dimensional direction of the laser beam in the position of an emission part can be enlarged. Thereby, it is possible to obtain a small-sized image display device that can ensure safety.

  As a preferred aspect of the present invention, the optical path conversion unit is preferably a hologram element that refracts light from the scanning unit. When a hologram element is used as the optical path conversion unit, the optical path can be converted by refracting light from the scanning unit. In particular, when the laser beam is incident on the hologram element region at an angle that is largely skewed, the laser beam scanning region after the optical path conversion can be enlarged. For this reason, even if it does not use a large sized housing | casing, the scanning area | region of the two-dimensional direction of the laser beam in the position of an emission part can be enlarged. Thereby, it is possible to obtain a small-sized image display device that can ensure safety.

  Moreover, as a preferable aspect of the present invention, the modulation unit is preferably a spatial light modulation device. By using a spatial light modulation device as the modulation unit, the laser light from the light source unit can be modulated in accordance with the image signal. Thereby, an image can be displayed on a display part, a screen, or the like.

  Moreover, as a preferable aspect of the present invention, the power source unit that drives the light source unit and a conductive unit that electrically connects the power source unit and the light source unit are provided, and the conductive unit is provided integrally with the emission unit. When the emission unit is removed from the housing, it is desirable to disconnect the electrical connection between the power source unit and the light source unit by simultaneously removing the conductive unit.

  The housing seals a spatial region in which the intensity of the laser beam is concentrated to such an extent that the eye cannot be sufficiently protected by the scanning laser beam. When the emission unit is removed from the housing, for example, a high-intensity laser beam may enter the eye by looking into the housing. Therefore, the conductive part is connected between the power supply part and the light source part, and the conductive part and the emission part are provided integrally. When the emission part is removed, the conductive part integrated with the emission part is also removed at the same time, thereby disconnecting the electrical connection between the power supply part and the light source part. When the connection with the power supply unit is cut off, the light source unit stops the supply of laser light. In this way, when the emitting portion is removed, the supply of laser light can be stopped directly, and a situation in which high intensity laser light enters the eye can be avoided. Thereby, a safe image display apparatus can be obtained.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1-1 illustrates a schematic configuration of a mobile phone 100 that is an image display apparatus according to Embodiment 1 of the present invention. The mobile phone 100 includes a display unit 120 that displays an image in a rectangular area and an operation unit 150 on one surface constituting a substantially rectangular parallelepiped casing 110. The function as a mobile phone using the operation keys of the operation unit 150 is the same as that of the prior art. Therefore, description of the operation unit 150 is omitted, and only the configuration for displaying an image will be described below.

  The display unit 120 is provided to be rotatable about one side of the rectangular region on the operation unit 150 side. When the display unit 120 is rotated from the state illustrated in FIG. 1A, the transparent flat plate 107 that is an emission unit can be confirmed under the display unit 120 as illustrated in FIG. 1B. As the transparent flat plate 107, an optically transparent glass member or a resin member is used. FIG. 1-1 shows a state in which the angle formed by the display unit 120 and the transparent flat plate 107 is approximately zero degrees. In the state where the display unit 120 is closed as shown in FIG. 1A, the transparent flat plate 107 cannot be confirmed from the outside. Moreover, in the state which opened the display part 120 as shown to FIGS. 1-2, the transparent flat plate 107 can be confirmed from the outside.

  From the state where the display unit 120 is closed, the display unit 120 is opened in a direction in which the portion of the display unit 120 on the operation unit 150 side of the rectangular area is separated from the transparent flat plate 107. When the display unit 120 is opened in this manner, the display unit 120 can be fixed at a position where the surface of the rectangular area of the display unit 120 and the plane of the transparent flat plate 107 are at a predetermined angle θ. The predetermined angle θ can be set to 45 degrees, for example. FIG. 1-2 shows a state in which the display unit 120 is fixed at a position where the display unit 120 and the transparent flat plate 107 form an angle θ.

  First, a case where the display unit 120 is fixed at a position where the display unit 120 and the transparent flat plate 107 are at an angle θ will be described. FIG. 2 shows a configuration in which the inside of the housing 110 in the state shown in FIG. 1-2 is viewed from the side surface side of the housing 110. The housing 110 houses a laser light source 101, a beam shaping optical system 102, a galvanometer mirror 103 that is a scanning unit, and a reflection mirror 105 that is an optical path conversion unit. The laser light source 101 includes a red laser beam (hereinafter referred to as “R light”), a green laser light (hereinafter referred to as “G light”), and a blue laser light (hereinafter referred to as “B light”). ") Is modulated in accordance with the image signal and supplied. As the laser light source 101, a semiconductor laser provided with a modulation unit for modulating laser light or a solid-state laser can be used. As described above, the laser light source 101 has a function of a light source unit that supplies a laser beam and a function of a modulation unit that modulates the laser beam according to an image signal.

  Each color light from the laser light source 101 enters the beam shaping optical system 102. The beam shaping optical system 102 shapes each color light into substantially parallel light having a high directivity, for example, a beam shape having a diameter of 0.5 mm. Each color light shaped into a highly directional beam shape by the beam shaping optical system 102 enters the galvanometer mirror 103. The galvanometer mirror 103 scans each color light in a two-dimensional direction by rotating around predetermined two axes orthogonal to each other. Each color light reflected by the galvanometer mirror 103 enters the reflection mirror 105.

  The reflection mirror 105 has reflection characteristics such that each color light from the galvano mirror 103 travels in a direction substantially perpendicular to the transparent flat plate 107. Accordingly, each color light reflected by the reflecting mirror 105 enters the transparent flat plate 107 from a direction substantially perpendicular to the transparent flat plate 107. In this way, the optical path of each color light from the galvanometer mirror 103 is bent by approximately 90 degrees in the direction of the transparent flat plate 107 by the reflection mirror 105. Further, the reflection mirror 105 is provided so that each color light from the galvano mirror 103 is incident at an angle that is largely inclined with respect to the normal of the rectangular region of the reflection mirror 105. When each color light is incident on the reflection mirror 105 at a greatly skewed angle, each color light is scanned over the entire surface of the reflection mirror 105 and the optical path is bent approximately 90 degrees on the substantially entire surface of the reflection mirror 105. For this reason, each color light is reflected by the reflection mirror 105, whereby the area of the scanning region at a position away from the galvano mirror 103 by a predetermined distance can be sized according to the region of the reflection mirror 105.

  Each color light incident on the transparent flat plate 107 is transmitted through the transparent flat plate 107 and travels in the direction of the reflective film 130 which is a reflection portion. The reflective film 130 is provided on the surface of the display unit 120 on the transparent flat plate 107 side. Therefore, when the display unit 120 is at the position shown in FIG. 2, the reflective film 130 and the transparent flat plate 107 form an angle θ. The position of the display unit 120 where the reflective film 130 and the transparent flat plate 107 form an angle θ is defined as a second position. The reflective film 130 and the transparent flat plate 107 form a rectangular area that is substantially the same as the rectangular area of the display unit 120. Therefore, in the state shown in FIG. 1-1, the reflective film 130 and the transparent flat plate 107 are overlapped with each other in almost the entire area. The position of the display unit 120 when the reflective film 130 and the transparent flat plate 107 overlap is the first position.

  Returning to FIG. 2, in the reflecting mirror 105, the area where the rectangular area of the reflecting mirror 105 is projected perpendicularly to the transparent flat plate 107 and the area where the rectangular area of the reflecting film 130 is vertically projected onto the transparent flat plate 107 are substantially the same. It is provided to become. Further, as described above, each color light reflected by the reflection mirror 105 travels in a direction substantially perpendicular to the area of the transparent flat plate 107 and is transmitted through the transparent flat plate 107. Accordingly, by scanning each color light from the galvanometer mirror 103 over substantially the entire area of the reflection mirror 105, each color light is scanned over substantially the entire area of the reflection film 130. Then, each color light reflected by the reflective film 130 travels in the direction of the screen 200.

  As described above, by fixing the display unit 120 to the second position where the reflective film 130 and the transparent flat plate 107 are at a predetermined angle θ, an image can be displayed on the screen 200. Note that the object on which the image is displayed by the light from the reflective film 130 may be a planar object having a region that is substantially the same as or larger than the irradiation region of each color light, and is limited to the screen 200. Absent. For example, an image can be displayed by irradiating the wall surface with light from the reflective film 130.

  Here, a configuration for ensuring the safety of the observer will be described. In the mobile phone 100 of the present embodiment, there may be a case where the laser light emitted from the transparent flat plate 107 directly enters the eyes. Laser products using laser light need to ensure safety by following safety standards for each laser intensity defined in JIS C 6802. For example, in order to make it unnecessary to attach an interlock or the like that automatically stops the supply of laser light as necessary, it is necessary that the laser light to be used has an intensity of a laser class 2 level or less. The laser light of the laser class 2 level does not need to consider the danger when it is scanned by the galvanometer mirror 103 and instantaneously passes through the pupil.

  When an image is displayed by scanning each color light beam with the galvanometer mirror 103, the intensity of the laser beam is dispersed over the entire area in the two-dimensional direction scanned by the laser beam. When the laser beam directly scans the position of the observer's pupil, the intensity of the laser beam is distributed over the entire two-dimensional scanning region at the pupil position. Then, a laser beam having an intensity corresponding to the pupil region with respect to the entire scanning region of the laser beam is incident on the pupil. The mobile phone 100 is provided with a transparent flat plate 107 at a position where the scanned laser light is incident on the pupil region at an intensity of at least a laser class 2 level. For example, consider a case where the diagonal length of the rectangular area of the transparent flat plate 107 is 3 inches. At this time, by setting the output of the laser beam from the laser light source 101 to 70 mW or less, the intensity of the laser beam incident on the pupil region can be set to the laser class 2 level or less.

  When the transparent flat plate 107 is provided in this way, the spatial region where the intensity of the laser light is concentrated to such an extent that the eye can not be sufficiently protected by the scanning laser light is closer to the galvanometer mirror 103 side than the transparent flat plate 107. That is, it is sealed inside the housing 110. In addition, outside the housing 110, the intensity of the laser light is dispersed to the extent that the eye can be protected even when the scanning laser light is incident on the observer's eyes, and a complicated control path or the like can be obtained. Safety can be ensured without using it.

  By reflecting each color light by the reflection mirror 105, the area of the scanning region at a position away from the galvano mirror 103 by a predetermined distance can be made to have a size corresponding to the region of the reflection mirror 105. On the other hand, when the optical path conversion unit which is the reflection mirror 105 is not provided and the optical path is not refracted, the area of the scanning region for each color light only increases in proportion to the distance from the galvanometer mirror 103. Therefore, if each color light is passed through the reflection mirror 105, the area of the scanning region at a position away from the galvano mirror 103 by the same predetermined distance can be increased as compared with the case where the reflection mirror 105 is not provided.

  When the optical path of each color light is not refracted by the reflection mirror 105, the area of the scanning region for each color light increases in proportion to the distance from the galvanometer mirror 103. At this time, in order to realize a scanning region having substantially the same area as the scanning region in the case of providing the reflection mirror 105 at the position of the transparent flat plate 107, a spatial interval is greatly separated from the galvano mirror 103 in the direction of the optical path of each color light. It is necessary to provide the transparent flat plate 107 at the position. When the spatial interval between the galvanometer mirror 103 and the transparent flat plate 107 increases, the housing 110 becomes large. For this reason, it becomes difficult to display an image on the screen 200 using the small mobile phone 100. On the other hand, when the reflection mirror 105 is provided as described above, the scanning area of each color light at the position of the transparent flat plate 107 can be enlarged regardless of the length of the optical path from the galvano mirror 103 to the transparent flat plate 107. . Since the area of the scanning region for each color light does not depend on the length of the optical path, the spatial distance from the galvanometer mirror 103 to the reflection mirror 105 and from the reflection mirror 105 to the transparent flat plate 107 can be reduced. Therefore, the area of the transparent flat plate 107 can be enlarged using the small casing 110.

  Since the housing 110 can be downsized, an image can be displayed on the screen 200 using the small mobile phone 100. Moreover, since the area | region of the transparent flat plate 107 can be enlarged, the transparent flat plate 107 can be provided in the position where safety | security can be ensured. Thereby, there is an effect that an image can be displayed on the screen 200 using the small mobile phone 100 and safety can be ensured.

  The direction in which the light path of each color light is refracted by the reflection mirror 105 is not limited to the direction substantially perpendicular to the transparent flat plate 107. If the scanning region of each color light at the position of the transparent flat plate 107 can ensure safety and an image can be displayed on the screen 200, each color light travels in a direction other than a direction substantially perpendicular to the transparent flat plate 107. It is good also as a structure made to do.

  The display unit 120 is movable to a second position where the reflective film 130 and the transparent flat plate 107 form a predetermined angle θ. By fixing the display unit 120 to the second position, the light from the transparent flat plate 107 can be reflected from the reflective film 130 toward the screen 200. Thereby, there is an effect that an image can be displayed on the screen 200. For example, by displaying an image on the screen 200, a plurality of people can appreciate the image. The image displayed on the screen 200 can be freely enlarged and reduced by adjusting the traveling direction of each color light.

  Next, image display when the display unit 120 is in the first position will be described. The mobile phone 100 in FIG. 1-1 shows a state where the display unit 120 is in the first position. At this time, since the reflective film 130 and the transparent flat plate 107 are in a state where the substantially entire surfaces of the reflective film 130 and the transparent flat plate 107 are superposed on each other, each color light is not emitted from the transparent flat plate 107. Since each color light is not emitted from the transparent flat plate 107, no image is displayed on the screen 200. Further, as described later, each color light from the laser light source 101 is not used for the image display on the display unit 120. For this reason, when the display part 120 exists in a 1st position, it is good also as a structure which interrupts | blocks supply of each color light from the laser light source 101. FIG.

  The display unit 120 displays an image using light from a light source different from each color light supplied from the laser light source 101. For this reason, when the angle formed by the reflective film 130 and the transparent flat plate 107 is approximately zero degrees, an image can be displayed on the display unit 120. The display unit 120 can have a structure using a self-luminous element such as an electroluminescence (hereinafter referred to as “EL”) element or a structure in which a liquid crystal and a backlight are combined. For example, when using EL elements, the display unit 120 causes each EL element to emit light by applying a voltage corresponding to an image signal to each EL element. An image can be displayed on the display unit 120 by causing each EL element to emit light in accordance with an image signal.

  Since the display unit 120 uses light from a light source different from the laser light source 101, an image can be displayed on the display unit 120 simultaneously with the image display on the screen 200. Further, an image signal used when the laser light source 101 modulates each color light can be used for image display on the display unit 120. When the same image signal as the display image on the screen 200 is used, an image that is substantially the same as that when the image is displayed on the screen 200 is displayed on the display unit 120. Therefore, substantially the same image can be displayed simultaneously on the screen 200 and the display unit 120. The substantially identical images displayed on the screen 200 and the display unit 120 include similar images that can be displayed using the same image signal and images that differ only in color tone.

  The display unit 120 may be configured to use a signal other than the image signal used when the laser light source 101 modulates each color light. When an image signal different from the display image on the screen 200 is used, an image different from the screen 200 is displayed on the display unit 120. Therefore, different images can be displayed simultaneously on the screen 200 and the display unit 120. Thereby, there is an effect that the same or different images can be simultaneously viewed on the screen 200 and the display unit 120. For example, the image on the display unit 120 can be enlarged and displayed on the screen 200 for viewing.

  The screen 200 and the display unit 120 are not limited to displaying images at the same time, and the image display on the screen 200 and the image display on the display unit 120 may be switched. For example, the image display on the display unit 120 may be stopped when the display unit 120 is opened, and the image display may be performed only on the screen 200. Thereby, there is an effect that the image display on the screen 200 and the display unit 120 can be switched by opening and closing the display unit 120.

  A schematic configuration of the mobile phone 300 according to the second embodiment of the present invention will be described with reference to FIGS. The same parts as those of the mobile phone 100 of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The cellular phone 300 according to the present embodiment displays an image on the screen 200 and the display unit 320 using each color light from the laser light source 101. A reflective / transmissive film 330 is provided on the surface of the display unit 320 on the transparent flat plate 107 side. The reflection / transmission film 330 reflects and transmits each color light from the transparent flat plate 107 according to the incident angle of each color light emitted from the transparent flat plate 107.

  First, a configuration for displaying an image on the display unit 320 using each color light from the laser light source 101 will be described with reference to FIG. The mobile phone 300 shown in FIG. 3A is in a state where the display unit 320 is in the first position. When the display unit 320 is in the first position, the transparent flat plate 107 and the reflective / transmissive film 330 are overlapped with each other in substantially the entire area. Each color light incident on the transparent flat plate 107 from the reflection mirror 105 passes through the transparent flat plate 107 and enters the reflective / transmissive film 330.

  At this time, each color light incident on the transparent flat plate 107 from the reflection mirror 105 travels in a direction substantially perpendicular to the region of the transparent flat plate 107. The reflection / transmission film 330 has a characteristic of transmitting each color light incident from a direction substantially perpendicular to the region of the reflection / transmission film 330. In this way, when the display unit 120 is in the first position, the reflective / transmissive film 330 transmits each color light traveling in a direction substantially perpendicular to the region of the transparent flat plate 107 from the transparent flat plate 107. Each color light transmitted through the reflection / transmission film 330 enters the display unit 320. The display unit 320 converts each color light from the reflective / transmissive film 330 into diffused light and emits it. For the display unit 320, for example, a parallel substrate made of ground glass can be used. Then, an image can be displayed on the exit surface of the display unit 320 by each color light transmitted through the display unit 320.

  Next, a configuration for displaying an image on the display unit 320 using each color light from the laser light source 101 will be described with reference to FIG. The mobile phone 300 illustrated in FIG. 3B is in a state where the display unit 320 is in the second position. At this time, the reflection / transmission film 330 and the transparent flat plate 107 form an angle θ. Each color light incident on the transparent flat plate 107 from the reflection mirror 105 passes through the transparent flat plate 107 and then enters the reflective / transmissive film 330. At this time, each color light incident on the reflective / transmissive film 330 travels in the direction of the angle 90-θ with respect to the region of the reflective / transmissive film 330.

  The reflection / transmission film 330 has a characteristic of reflecting each color light incident from an oblique direction with an angle of 90-θ with respect to the area of the reflection / transmission film 330 in the direction of the screen 200. For example, when the angle θ formed by the reflection / transmission film 330 and the transparent flat plate 107 is 45 degrees, the reflection / transmission film 330 converts each color light incident on the reflection / transmission film 330 from the oblique direction of 45 degrees to the screen. Reflects in the 200 direction. Thus, when the display unit 320 is fixed at the second position, the reflective / transmissive film 330 reflects each color light from the transparent flat plate 107 in the direction of the screen 200. An image can be displayed on the screen 200 by each color light traveling in the direction of the screen 200.

  When the display unit 120 is in the first position, each color light is transmitted through the reflection / transmission film 330 and enters the display unit 320. The display unit 320 displays an image by transmitting each color light from the reflection / transmission film 330. Further, when the display unit 120 is at the second position, each color light is reflected by the reflective / transmissive film 330 and travels toward the screen 200. In this way, by moving the position of the display unit 120 to the first position and the second position, the image display on the display unit 320 and the image display on the screen 200 can be switched.

  Furthermore, since it is possible to switch between the image display on the display unit 320 and the image display on the screen 200, an image is displayed on the display unit 320 and the screen 200 using each color light from the single laser light source 101. be able to. Since each color light from the single laser light source 101 can be used, the mobile phone 300, in particular, the display unit 320 can also have a simple configuration. Thereby, there is an effect that the mobile phone 300 can have a simple configuration and can be switched between the image display on the screen 200 and the display unit 320 for viewing.

  Next, a configuration for displaying the image on the display unit 320 and the image on the screen 200 with an appropriate amount of light will be described. The reflection / transmission film 330 has a characteristic of reflecting almost all of the color lights incident in the direction from the transparent flat plate 107 to the reflection / transmission film 330, for example, an oblique direction of 45 degrees, in the direction of the screen 200. For this reason, when the display unit 120 is in the second position, it is possible to display an image on the screen 200 by using each color light from the laser light source 101 to the maximum extent. Further, the reflection / transmission film 330 has a characteristic of transmitting only a part of each color light incident from a direction substantially perpendicular to the area of the reflection / transmission film 330, for example, only a few percent of each incident color light. For this reason, when displaying an image on the display part 320, it can be set as the structure which uses a laser beam of a small light quantity compared with the case where the image display on the screen 200 is performed.

  When displaying an image by irradiating the screen 200 with laser light, the observer observes reflected light on the screen 200. On the other hand, when displaying an image on the display unit 320, the observer observes the image by directly viewing the light from the display unit 320. For this reason, compared with the case where an image is displayed on the display unit 320, the case where an image is displayed on the screen 200 is more susceptible to the influence of ambient brightness. If the difference between the brightness of the display image and the brightness of the screen 200 is small, the image on the screen or the like becomes unclear. Therefore, when displaying an image on the screen 200, it is preferable to make maximum use of each color light from the laser light source 101.

  On the contrary, if laser light having an intensity necessary for displaying an image on the screen 200 is used as it is for image display of the display unit 320, the image may become unclear because the amount of light is too large. Therefore, when displaying an image on the display unit 320, it is preferable to use a laser beam with a smaller amount of light than when displaying an image on the screen 200. The reflective / transmissive film 330 has a characteristic that the amount of light reflected when the display unit 120 is in the second position is larger than the amount of light transmitted when the display unit 120 is in the first position. .

  As described above, even when the single laser light source 101 is used, the intensity of each color light is adjusted by the reflective / transmissive film 330 when displaying an image on the screen 200 and when displaying an image on the display unit 320. Can do. Thereby, there is an effect that the image on the display unit 320 and the image on the screen 200 can be displayed with an appropriate amount of light. Further, since the amount of light is adjusted only by using the reflection / transmission film 330, the intensity of each color light can be adjusted with a simple configuration.

  Next, a mobile phone 400 according to a modification of the second embodiment will be described with reference to FIGS. 4A and 4B. The same parts as those of the mobile phone 300 according to the second embodiment are denoted by the same reference numerals, and redundant description is omitted. The mobile phone 300 according to the second embodiment has a configuration in which the amount of light of each color when displaying an image on the screen 200 is larger than the amount of light of each color when displaying an image on the display unit 320 due to the characteristics of the reflective / transmissive film 330. And On the other hand, the cellular phone 400 according to the present modification is characterized in that the sensor 470 detects the position of the display unit 320 to adjust the amount of laser light. In addition, in order to clarify the characteristic part of this modification, in FIG. 4A and FIG. 4B, the optical path of each color light is abbreviate | omitted and the structure is shown.

  The mobile phone 400 is provided with a sensor 470 that detects the position of the display unit 320. As illustrated in FIG. 4B, when the sensor 470 detects that the display unit 320 is in the second position state, the laser light source 101 performs adjustment to maximize the light amount of each color light. By setting the light amount of each color light to the maximum value, it is possible to display an image on the screen 200 using the maximum amount of laser light when the display unit 120 is in the second position. Further, as shown in FIG. 4A, when the sensor 470 detects that the display unit 120 is in the first position state, the laser light source 101 sets the light amount of each color light to a value smaller than the maximum value, for example, Adjust to a few percent of the maximum value.

  Since the image of the display unit 320 can be displayed using each color light having a light amount smaller than the maximum light amount, an image is displayed on the display unit 320 with an appropriate light amount when the display unit 120 is in the first position. Can do. The light quantity of each color light from the laser light source 101 can be adjusted by changing the resistance value of a variable resistor (not shown) connected to the drive circuit of the laser light source 101, for example. Thereby, there is an effect that the image on the display unit 320 and the image on the screen 200 can be displayed with an appropriate amount of light. Furthermore, according to the configuration of the present modification, the laser light that does not contribute to image formation can be reduced by adjusting the light amount of each color light from the laser light source 101.

  Next, the configuration of the mobile phone according to the third embodiment of the present invention will be described. The cellular phone of the present embodiment is similar to the cellular phone 300 of the second embodiment in that the laser light from the galvano mirror is used for image display on the display unit. The difference between the mobile phone of this embodiment and the mobile phone 300 of the second embodiment is that the laser light from the galvano mirror is used as control light, and the display unit emits light in accordance with the amount of laser light. Since the mobile phone of the present embodiment has a different configuration from the mobile phone 300 of the second embodiment only in the display portion, FIG. 3-1 showing the configuration of the second embodiment is used, and overlapping description is provided. Omitted.

  The display unit 370 of the mobile phone 350 of this embodiment emits light according to the amount of laser light. As the display portion 370, for example, an electroluminescence (hereinafter referred to as “EL”) element which is a self-luminous element can be used. The EL element emits light according to a voltage applied between electrodes provided with the EL layer interposed therebetween. The EL element used in the display unit 370 emits light according to the amount of laser light by changing the applied voltage according to the amount of laser light that is control light. As a configuration for emitting light according to the amount of laser light, for example, a conductivity variable unit that can change the electrical conductivity according to the amount of laser light can be used. The conductivity variable portion functions as an insulator having substantially zero conductivity when no laser beam is incident. In addition, when the intensity-modulated laser light is incident on the conductivity variable portion, the conductivity of the conductivity variable portion can be changed according to the amount of laser light. Then, by applying a certain voltage in advance between the electrodes of the EL element, a voltage corresponding to the amount of laser light can be applied to the EL layer.

  In the display portion 370, EL elements are provided in accordance with the pixels. Then, the display unit 370 can be driven in accordance with the amount of laser light (light addressing) by scanning the laser light with the conductivity variable portion of the EL element provided in accordance with the pixel. Furthermore, as the EL element, an R light EL element that emits R light, a G light EL element that emits G light, and a B light EL element that emits B light can be used. Thereby, a color image can be displayed on the display unit 370. The configuration for causing the display unit 370 to scan with laser light when the display unit 370 is at the first position is the same as that described in the second embodiment. In the light addressing, only one color light, for example, the R light among the color lights can be modulated according to the image signal. The R light modulated according to the image signal scans the display unit 370 by the galvanometer mirror 103. Note that the configuration is not limited to using one color light for optical addressing, and two or three of the color lights may be used for optical addressing.

  In this manner, the laser light from the galvano mirror 103 is used as control light, and optical addressing of the display unit 370 is performed according to the image signal. Thereby, there is an effect that an image can be displayed on the display unit 370 according to the image signal. Note that the display portion 370 may be a self-luminous element other than an EL element or a micro electro mechanical system (MEMS). When the MEMS is used, for example, an image can be displayed by reflecting light from another light source according to an image signal.

  Further, as the display portion 370, a liquid crystal and a backlight may be used together. In the case where liquid crystal is used for the display portion 370, the voltage applied to the liquid crystal layer is changed in accordance with the amount of laser light to modulate the amount of light transmitted from the backlight. An image can be displayed on the display unit 370 by modulating the amount of light from the backlight in accordance with the image signal. Note that the backlight may be configured to supply each color light from the laser light source 101 by the galvanometer mirror 103. By using each color light from the laser light source 101 as a backlight, other light sources are unnecessary, and the mobile phone 350 can be configured simply.

  FIG. 5 shows a schematic configuration of a mobile phone 500 according to Embodiment 4 of the present invention. The same parts as those of the mobile phone 300 of the second embodiment are denoted by the same reference numerals, and redundant description is omitted. The mobile phone 300 according to the second embodiment includes a reflection mirror 105 (see FIGS. 3A and 3B) as an optical path conversion unit. The cellular phone 500 according to the present embodiment includes a hologram element 506 as an optical path conversion unit. In the mobile phone 500 of the present embodiment, the configuration for displaying an image on the display unit 320 is the same as that of the mobile phone 300 of the second embodiment. Therefore, in this embodiment, the illustration of the configuration for displaying an image on the display unit 320 is omitted, and the following description is given using the configuration for displaying an image on the screen 200.

  Each color light reflected by the galvanometer mirror 103 enters a hologram element 506 which is an optical path conversion unit. The hologram element 506 is provided on the surface of the transparent flat plate 107 on the incident side of each color light. The hologram element 506 has a rectangular area that is substantially the same as the rectangular area of the transparent flat plate 107. For this reason, the hologram element 506 and the transparent flat plate 107 are substantially overlapped with each other in the rectangular area. The hologram element 506 has light deflection characteristics such that each color light from the galvanometer mirror 103 is refracted in a direction substantially perpendicular to the transparent flat plate 107. Accordingly, each color light refracted by the hologram element 506 enters the transparent flat plate 107 from a direction substantially perpendicular to the transparent flat plate 107. The configuration for displaying an image on the screen 200 using each color light emitted from the transparent flat plate 107 is the same as that of the mobile phone 300 of the second embodiment.

  In this way, the optical path of each color light from the galvanometer mirror 103 is bent by approximately 90 degrees in the direction of the transparent flat plate 107 by the hologram element 506. Each color light from the galvanometer mirror 103 is incident on the hologram element 506 from an angle direction greatly inclined with respect to the normal of the rectangular area of the hologram element 506. In order to make each color light incident on the hologram element 506 at a greatly skewed angle, each color light after its optical path is bent by approximately 90 degrees as in the case of the reflection mirror 105 (see FIG. 2) of the mobile phone 100 of the first embodiment. The scanning area in the two-dimensional direction can be increased. Therefore, similarly to the mobile phone 100 of the first embodiment, the scanning area in the two-dimensional direction of each color light at the position of the transparent flat plate 107 can be enlarged without using the large casing 110. Thereby, there exists an effect that it is small and can ensure safety.

  In the present embodiment, each color light from the galvanometer mirror 103 is advanced in the direction of the hologram element 506 in the hollow inside the housing 110. Not only this but the structure which provides the light guide body which consists of a transparent glass member and a resin member in the inside of the housing | casing 110 is good. When a light guide is provided inside the housing 110, each color light from the galvano mirror 103 passes through the light guide and then enters the hologram element 506.

  FIG. 6 shows a schematic configuration of a mobile phone 600 according to the fifth embodiment of the present invention. The same parts as those of the mobile phone 300 of the second embodiment are denoted by the same reference numerals, and redundant description is omitted. The cellular phone 600 of this embodiment includes a spatial light modulation device 604 that modulates each color light according to an image signal as a modulation unit. In this embodiment, the illustration of the configuration for displaying an image on the display unit 320 is omitted, and the following description is given using the configuration for displaying an image on the screen 200.

  The laser light source 101 of the mobile phone 300 according to the second embodiment modulates and supplies each color light according to an image signal. On the other hand, the laser light source 601 of the mobile phone 600 of this embodiment is not provided with a modulation unit for modulating the laser light according to the image signal. Therefore, the laser light source 601 supplies each color light having a constant intensity. Each color light from the galvanometer mirror 103 enters a spatial light modulation device 604 that is a modulation unit. The spatial light modulator 604 modulates each color light from the galvanometer mirror 103 according to the image signal and emits the light in the direction of the reflection mirror 105. As the spatial light modulation device 604, for example, a transmissive liquid crystal image display device can be used.

  In the mobile phone 600 of the present embodiment, the configuration for displaying an image on the screen 200 using each color light from the reflection mirror 105 and the configuration for displaying an image on the display unit 320 are the same as the mobile phone 300 of the second embodiment. Are the same. Thus, by using the spatial light modulator 604, each color light can be modulated in accordance with the image signal. Thereby, there is an effect that an image can be displayed on the display unit 320 and the screen 200.

  FIG. 7-1 shows a schematic configuration of a mobile phone 700 according to Embodiment 6 of the present invention. The same parts as those of the mobile phone 100 of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. In the mobile phone 700 of the present embodiment, the configuration for displaying images on the screen and the display unit 120 is the same as that of the mobile phone 100 of the first embodiment. The cellular phone 700 of this embodiment is characterized in that a conductive portion 760 is provided integrally with a transparent flat plate 107 that is an emission portion.

  The mobile phone 700 shown in FIG. 7A is in a state where the display unit 120 is in the second position. The laser light source 101 supplies each color light by the drive current from the power supply unit 762. The conductive portion 760 is provided so as to be integrated with the transparent flat plate 107. The conductive portion 760 electrically connects the power source portion 762 and the laser light source 101. The conductive portion 760 can be formed of a conductive member, for example, a conductive metal member. The laser light source 101 can be driven by being electrically connected to the power supply unit 762 via the conductive unit 760.

  The mobile phone 700 shown in FIG. 7B is in a state where the transparent flat plate 107 is removed from the housing 110. The case where the transparent flat plate 110 is removed from the casing 110 may be repaired, discarded, damaged, or artificially removed. When the transparent flat plate 107 is removed from the housing 110, the conductive portion 760 provided integrally with the transparent flat plate 107 is also removed at the same time. When the conductive portion 760 is removed, the electrical connection between the power source portion 762 and the laser light source 101 is interrupted. The laser light source 101 stops the supply of each color light when the electrical connection with the power supply unit 762 is cut off. In this manner, the supply of each color light from the laser light source 101 is stopped in a situation where the transparent flat plate 107 is removed from the housing 110 due to human or damage.

  As described in the first embodiment, the transparent flat plate 107 is positioned so that each color light incident on the pupil has an intensity capable of ensuring safety even when each color light being scanned enters the pupil. Is provided. For this reason, a spatial region in which the intensity of each color light is concentrated to such an extent that eye protection cannot be sufficiently performed by each color light being scanned is sealed inside the housing 110. Assume that a situation occurs in which the transparent flat plate 107 is detached from the housing 110 in this state. When the transparent flat plate 107 is removed, for example, the inside of the housing 110 can be looked into. If each color light remains supplied from the laser light source 101 when looking into the interior of the housing 110, a situation in which a laser beam having a high intensity is incident on the eye may occur.

  In the mobile phone 700 of this embodiment, the supply of the drive current to the laser light source 101 is stopped simultaneously with the removal of the transparent flat plate 107. The laser light source 101 immediately stops the supply of each color light when the supply of the drive current is stopped. In this way, when the transparent flat plate 107 is removed, the supply of each color light can be stopped directly, and a situation in which a high intensity laser beam is incident on the eye can be avoided. Thereby, there exists an effect that safety can be secured.

  Note that the mobile phone 700 according to the present embodiment is not limited to the configuration based on the mobile phone 100 according to the first embodiment, but may be configured based on the mobile phone according to each of the above embodiments. The same effect as that of the mobile phone 700 of this embodiment can be obtained regardless of which of the mobile phones of the above-described embodiments is used. In the mobile phone of each of the above embodiments, a laser light source is used for image display on a screen or the like. However, the present invention is not limited to this as long as the configuration uses beam light. For example, a laser diode may be used as the light source. Further, in each of the above-described embodiments, the configuration of the mobile phone is described as the image display device. However, other small-sized image display devices such as a PDA and a mobile notebook personal computer may be used.

  As described above, the image display device according to the present invention is useful when displaying text, still images, or moving images in a presentation. In particular, the display image of a small image display device such as a mobile phone is displayed on a screen or the like. It is suitable for displaying.

1 is a schematic configuration diagram of a mobile phone according to Embodiment 1 of the present invention. The figure of the mobile telephone in the state which has a display part in a 2nd position. The figure which shows the structure for displaying an image on a screen. 1 is a schematic configuration diagram of a mobile phone according to Embodiments 2 and 3 of the present invention. The figure which shows the structure for displaying an image on a screen. FIG. 10 is a schematic configuration diagram of a mobile phone according to a modified example of the second embodiment. The figure of the mobile telephone in the state which has a display part in a 2nd position. The schematic block diagram of the mobile telephone which concerns on Example 4 of this invention. FIG. 10 is a schematic configuration diagram of a mobile phone according to a fifth embodiment of the present invention. FIG. 9 is a schematic configuration diagram of a mobile phone according to Embodiment 6 of the present invention. The figure of the mobile phone in the state where the transparent flat plate was removed from the housing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Mobile phone, 101 Laser light source, 102 Beam shaping optical system, 103 Galvano mirror, 105 Reflective mirror, 107 Transparent flat plate, 110 Case, 120 Display part, 130 Reflective film, 150 Operation part, 200 Screen, 300 Mobile phone, 320 Display unit, 330 Reflective transmission film, 350 Cell phone, 370 Display unit, 400 Cell phone, 470 Sensor, 500 Cell phone, 506 Hologram element, 600 Cell phone, 601 Laser light source, 604 Spatial light modulator, 700 Cell phone, 760 Conductive part, 762 Power supply part, θ angle

Claims (9)

A light source unit for supplying beam-shaped light;
A scanning unit that scans light from the light source unit in a two-dimensional direction;
A modulation unit that modulates light of the light source unit or light scanned by the scanning unit according to an image signal;
An optical path conversion unit that converts an optical path of light from the scanning unit;
A housing in which at least the light source unit, the scanning unit, and the optical path conversion unit are housed, and an emission unit that emits the light whose optical path is converted by the optical path conversion unit to the outside;
A display unit provided on the injection side of the injection unit;
A reflective portion provided on a surface of the display portion on the emission portion side,
An image display device for displaying an image formed by modulated light,
The exit section is provided at a position where light scanned by the scanning section enters at a predetermined area with an intensity of at least a predetermined value,
The optical path conversion unit is configured so that the area of the scanning region of the light passing through the optical path conversion unit at a position away from the scanning unit by a predetermined distance is from the scanning unit when the optical path conversion unit is not provided. Provided at a position that is larger than the area of the other scanning region at a position separated by a distance,
The display unit is movably provided at a first position where the reflection unit and the emission unit overlap each other and a second position where the reflection unit and the emission unit form a predetermined angle. And
The reflection part is a reflective transmission film that reflects and transmits light from the emission part according to an incident angle of light from the emission part,
The reflective / transmissive film transmits light from the emission unit when the display unit is in the first position, and reflects light from the emission unit when the display unit is in the second position. And
When the display unit is at the first position, the display unit displays the image by light scanned by the scanning unit,
When the display unit is at the second position, the reflection unit reflects light from the emission unit.   The image display apparatus according to claim 1, wherein the display unit displays the image by transmitting light from the scanning unit.   The image display device according to claim 1, wherein the display unit displays the image by emitting light according to a light amount from the scanning unit. The reflection / transmission film has a larger amount of light reflected when the display unit is in the second position than that of light transmitted when the display unit is in the first position. The image display device according to claim 1, wherein the image display device has such characteristics. A sensor for detecting the position of the display unit;
When the sensor detects that the display unit is in the first position, the light source unit sets the light amount of the beam-shaped light to be supplied to a maximum value, and the sensor includes the display unit in the first position. If it is detected that is in the second position, the light source unit, the light quantity of the beam-shaped light supplied any one of claims 1 to 4, characterized in that the said maximum value less than the The image display device described in 1. The optical path conversion unit, an image display apparatus according to any one of claims 1 to 5, characterized in that a reflecting mirror for reflecting light from said scanning unit. The optical path conversion unit, an image display apparatus according to any one of claims 1 to 5, characterized in that a hologram element for refracting light from the scanning unit. The modulation unit, the image display apparatus according to any one of claims 1 to 7, characterized in that a spatial light modulator. A power supply unit for driving the light source unit;
A conductive part that electrically connects the power supply part and the light source part,
The conductive portion is provided integrally with the injection portion,
When the injection unit is detached from the housing, by the conductive portion is removed at the same time, one of the claims 1-8, characterized by blocking the electrical connection between said power supply portion and the light source unit The image display device according to claim 1.

Images