JP2012088716A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent that, when a portable information processor incorporating an image display device is used with placed on a surface of a desk, an image is displayed on a screen in a state where a part of the image is not displayed because a laser beam is obstructed by the surface of the desk.SOLUTION: An image display device comprises a movable body 12 provided to be allowed to be housed in/extracted from a housing attached on a drive bay of a portable information processor. The movable body includes a first unit 13 having at least a projection optical system, and a second unit 14 rotatably supporting the first unit 13 via a hinge part 73. In the first unit, an emission window 74 from which a laser beam having passed through the projection optical system is emitted is provided at an end in the opposite side to the hinge part. The hinge part is configured such that the first unit rotates in a direction in which a projection angle of a laser beam relative to a screen varies upward and downward, that is, around a first rotation axis.

Description

  The present invention relates to an image display apparatus using a semiconductor laser as a light source.

  In recent years, a technique using a semiconductor laser as a light source of an image display device has attracted attention. This semiconductor laser has better color reproducibility, instantaneous lighting, longer life, and higher power consumption compared to mercury lamps that have been widely used in image display devices. It has various advantages, such as being able to be made and being easy to miniaturize.

  The advantage of such an image display device using a semiconductor laser is convenient when it is built in a portable electronic device. For example, a technique for incorporating an image display device using a semiconductor laser into a mobile phone terminal is known. (See Patent Document 1). When the image display device is built in the portable electronic device in this way, the screen can be enlarged and displayed on the screen as needed, so that convenience can be improved.

JP 2007-316393 A

  An image display device using a semiconductor laser as a light source can be improved in convenience even if it is built in a portable information processing device (so-called notebook personal computer). The image display device is housed inside the body.

  However, since the casing of the portable information processing device is formed flat to improve portability, when the portable information processing device is placed on a desk, the image display device approaches the placement surface on the desk. The laser beam emitted from the image display device may be blocked by the mounting surface. In such a state, the lower part of the screen displayed on the screen is missing, and the screen is placed on the screen. This causes a problem that it cannot be displayed properly.

  The present invention has been devised to solve such problems of the prior art, and its main purpose is to use a portable information processing apparatus with a built-in image display device mounted on a desk. In this case, it is an object to provide an image display device configured to avoid displaying an image on a screen in a state where a laser beam is blocked by a mounting surface on a desk.

  An image display device according to the present invention is an image display device that is accommodated in a drive bay of a portable information processing device in a replaceable manner with an optical disk device, and emits a laser beam of each color and a housing attached to the drive bay. A laser light source device, a light modulation element that modulates laser light emitted from the laser light source device based on a video signal, a projection optical system that projects the modulated laser light formed by the light modulation element onto a screen, and A control unit that controls the laser light source device and the light modulation element; a first unit that is provided so as to be able to be inserted into and removed from the housing; and includes the laser light source device, the light modulation element, and the projection optical system; A movable body configured with a second unit provided with the control unit that rotatably supports the first unit via a hinge unit, When projecting an image onto the screen, a part of the first unit, the hinge part, and the second unit of the movable body is sequentially pulled out from the housing, and is provided in the first unit. The light exit window moves to a projecting position directly facing the screen, and at the projecting position, the hinge portion changes the projection angle of the laser light emitted from the exit window in the vertical direction. It is set as the structure which rotates 1 unit.

  According to the present invention, when the image display device is built in a portable information processing device and used on a desk, the first unit is protruded to the side and the exit window faces the screen. In addition, the projection angle of the laser beam on the screen can be changed in the vertical direction, so that the laser beam is blocked by the mounting surface on the desk and the lower part of the image is missing on the screen. As a result, the convenience of the portable information processing apparatus can be improved.

The perspective view which shows the example which incorporated the image display apparatus 1 by this invention in the portable information processing apparatus 2 Schematic configuration diagram of an optical engine unit 15 incorporated in the optical engine unit 13 The schematic diagram which shows the condition of the laser beam in the green laser light source device 22 The perspective view which shows the image display apparatus 1 The block diagram which shows schematic structure of the image display apparatus 1 The front view which shows the state which mounted the portable information processing apparatus 2 on the desk The side view which shows the state which mounted the portable information processing apparatus 2 on the desk The perspective view which shows the hinge part 73 in detail An exploded view showing the state of the insertion area of the wiring cable 93 by removing the parts on the optical engine unit 13 side Schematic perspective view showing an example of an image display device Schematic perspective view showing an example of a hinge part

  A first invention made to solve the above problems is an image display device accommodated in a drive bay of a portable information processing apparatus in an interchangeable manner with an optical disk device, and a housing attached to the drive bay; A laser light source device that emits laser light of each color, a light modulation element that modulates the laser light emitted from the laser light source device based on a video signal, and a modulated laser light formed by the light modulation element are projected onto a screen A projection optical system, a control unit for controlling the laser light source device and the light modulation element, and a laser light source device, the light modulation element, and the projection optical system, provided so as to be able to be inserted into and removed from the housing. A movable body composed of the first unit and the second unit including the control unit that rotatably supports the first unit via a hinge unit. And projecting an image onto the screen, the first unit of the movable body, the hinge portion, and a part of the second unit are sequentially pulled out from the housing, and the first unit The exit window of the laser beam provided in the unit moves to a projecting position directly facing the screen, and at the projecting position, the hinge portion sets the projection angle of the laser beam emitted from the exit window in the vertical direction. The first unit is rotated in the changing direction.

  According to this, when the image display device is built in the portable information processing device and placed on the desk and used, the first unit can be protruded to the side and the exit window can face the screen. At the same time, the projection angle of the laser beam on the screen can be changed in the vertical direction, so that the laser beam is blocked by the mounting surface on the desk and the lower part of the image is not cut off on the screen. As a result, the convenience of the portable information processing apparatus can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an example in which an image display device 1 according to the present invention is built in a portable information processing device 2. The portable information processing device (electronic device) 2 includes a main body 3 in which a control board (not shown) on which a CPU, a memory, and the like are mounted, and a display unit 4 that includes a liquid crystal panel. The main body unit 3 and the display unit 4 are connected by a hinge unit 5 so that the main body unit 3 and the display unit 4 are overlapped to enhance portability.

  A keyboard 6 and a touch pad 7 are provided on the upper surface 8 a of the housing 8 of the main body 3. Also, on the back side of the keyboard 6 in the housing 8 of the main body 3, peripheral devices such as an optical disk device (one that records and reproduces information on an optical disk such as a Blu-ray disc, DVD and CD) can be replaced. A storage space, so-called drive bay, is formed, and the image display device 1 is attached to the drive bay.

  The image display device 1 includes a housing 11 and a movable body 12 provided so as to be able to be taken in and out of the housing 11. The movable body 12 includes an optical engine unit (first unit) 13 in which optical components for projecting laser light onto the screen S are accommodated, and a substrate for controlling the optical components in the optical engine unit 13. It is comprised with the control unit (2nd unit) 14 accommodated.

  FIG. 2 is a schematic configuration diagram of the optical engine unit 15 built in the optical engine unit 13. The optical engine unit 15 includes a green laser light source device 22 that outputs green laser light, a red laser light source device 23 that outputs red laser light, a blue laser light source device 24 that outputs blue laser light, and a video signal. The liquid crystal reflection type light modulation element 25 that modulates the laser light from each of the laser light source devices 22 to 24, and the laser light from each of the laser light source devices 22 to 24 is reflected and irradiated to the light modulation element 25. A polarization beam splitter 26 that transmits the modulated laser light emitted from the modulation element 25, a relay optical system 27 that guides the laser light emitted from each of the laser light source devices 22 to 24 to the polarization beam splitter 26, and the polarization beam splitter 26 are provided. A projection optical system 28 that projects the transmitted modulated laser light onto the screen S.

  The optical engine unit 15 displays a color image by a so-called field sequential method, and laser beams of each color are sequentially output from the laser light source devices 22 to 24 in a time-sharing manner, and an image by the laser beam of each color is visually displayed. It is recognized as a color image by the afterimage effect.

  The relay optical system 27 includes collimator lenses 31 to 33 that convert the laser beams of the respective colors emitted from the laser light source devices 22 to 24 into parallel beams, and the laser beams of the respective colors that have passed through the collimator lenses 31 to 33 in a predetermined direction. First and second dichroic mirrors 34 and 35 guided to, a diffusion plate 36 for diffusing the laser light guided by the dichroic mirrors 34 and 35, and a field lens for converting the laser light that has passed through the diffusion plate 36 into a convergent laser 37.

  Assuming that the side from which the laser light is emitted from the projection optical system 28 toward the screen S is the front side, the blue laser light is emitted backward from the blue laser light source device 24, and green with respect to the optical axis of the blue laser light. The green laser light and the red laser light are emitted from the green laser light source device 22 and the red laser light source device 23 so that the optical axes of the laser light and the red laser light are orthogonal to each other. , And the green laser light are guided to the same optical path by the two dichroic mirrors 34 and 35. That is, the blue laser light and the green laser light are guided to the same optical path by the first dichroic mirror 34, and the blue laser light, the green laser light, and the red laser light are guided to the same optical path by the second dichroic mirror 35.

  The first and second dichroic mirrors 34 and 35 are formed with films for transmitting and reflecting laser light of a predetermined wavelength on the surface, and the first dichroic mirror 34 transmits blue laser light. And reflects the green laser light. The second dichroic mirror 35 transmits red laser light and reflects blue laser light and green laser light.

  Each of these optical members is supported by the housing 41. The housing 41 functions as a radiator that dissipates heat generated by the laser light source devices 22 to 24, and is formed of a material having high thermal conductivity such as aluminum or copper.

  The green laser light source device 22 is attached to an attachment portion 42 formed on the housing 41 in a state of protruding toward the side. The attachment portion 42 is provided in a state of protruding in a direction perpendicular to the side wall portion 44 from a corner portion where the front wall portion 43 and the side wall portion 44 that are respectively positioned in front and side of the accommodation space of the relay optical system 27 intersect. ing. The red laser light source device 23 is attached to the outer surface side of the side wall 44 while being held by the holder 45. The blue laser light source device 24 is attached to the outer surface side of the front wall portion 43 while being held by the holder 46.

  The red laser light source device 23 and the blue laser light source device 24 are configured by a so-called CAN package, and the optical axis is positioned on the central axis of the can-shaped exterior portion with the laser chip that outputs the laser light supported by the stem. The laser beam is emitted from a glass window provided in the opening of the exterior part. The red laser light source device 23 and the blue laser light source device 24 are fixed to the holders 45 and 46 by, for example, press-fitting into the mounting holes 47 and 48 formed in the holders 45 and 46. The heat generated by the laser chips of the blue laser light source device 24 and the red laser light source device 23 is transmitted to the housing 41 through the holders 45 and 46 to be dissipated, and each of the holders 45 and 46 has a thermal conductivity such as aluminum or copper. It is made of a high material.

  The green laser light source device 22 includes a semiconductor laser 51 that outputs excitation laser light, a FAC (Fast-Axis Collimator) lens 52 that is a condensing lens that condenses the excitation laser light output from the semiconductor laser 51, and a rod. A lens 53, a solid-state laser element 54 that outputs a basic laser beam (infrared laser beam) when excited by an excitation laser beam, and converts a wavelength of the basic laser beam to output a half-wavelength laser beam (green laser beam) A wavelength conversion element 55, a concave mirror 56 that forms a resonator together with the solid-state laser element 54, a glass cover 57 that prevents leakage of excitation laser light and fundamental wavelength laser light, and a base 58 that supports each part, And a cover body 59 that covers each part.

  The green laser light source device 22 is fixed by attaching the base 58 to the mounting portion 42 of the housing 41, and a required width (for example, 0.5 mm) between the green laser light source device 22 and the side wall portion 44 of the housing 41. The following gaps are formed. This makes it difficult for the heat of the green laser light source device 22 to be transmitted to the red laser light source device 23, suppresses the temperature rise of the red laser light source device 23, and allows the red laser light source device 23 with poor temperature characteristics to operate stably. Can do. Further, in order to secure a required optical axis adjustment allowance (for example, about 0.3 mm) of the red laser light source device 23, a required width (for example, 0.3 mm or more) is provided between the green laser light source device 22 and the red laser light source device 23. ) Is provided.

  FIG. 3 is a schematic diagram showing the state of laser light in the green laser light source device 22. The laser chip 61 of the semiconductor laser 51 outputs excitation laser light having a wavelength of 808 nm. The FAC lens 52 reduces the spread of the first axis of the laser beam (the direction perpendicular to the optical axis direction and along the drawing sheet). The rod lens 53 reduces the spread of the slow axis of laser light (in the direction perpendicular to the drawing sheet).

The solid-state laser element 54 is a so-called solid-state laser crystal, and is excited by excitation laser light having a wavelength of 808 nm that has passed through the rod lens 53 to output fundamental wavelength laser light (infrared laser light) having a wavelength of 1064 nm. This solid-state laser element 54 is obtained by doping an inorganic optically active substance (crystal) made of Y (yttrium) VO ₄ (vanadate) with Nd (neodymium), and more specifically, YVO _{4 as} a base material. The Y is doped by substitution with Nd ⁺³ which is an element that emits fluorescence.

  On the side of the solid-state laser element 54 facing the rod lens 53, a film having a function of preventing reflection of excitation laser light having a wavelength of 808 nm and high reflection of fundamental wavelength laser light having a wavelength of 1064 nm and half-wavelength laser light having a wavelength of 532 nm. 62 is formed. On the side of the solid-state laser element 54 facing the wavelength conversion element 55, a film 63 having an antireflection function for a fundamental wavelength laser beam having a wavelength of 1064 nm and a half wavelength laser beam having a wavelength of 532 nm is formed.

  The wavelength conversion element 55 is a so-called SHG (Second Harmonics Generation) element, which converts the wavelength of a fundamental wavelength laser beam (infrared laser beam) having a wavelength of 1064 nm output from the solid-state laser element 54 to a half-wavelength laser having a wavelength of 532 nm. Light (green laser light) is generated.

  On the side of the wavelength conversion element 55 facing the solid-state laser element 54, a film 64 having functions of preventing reflection of the fundamental wavelength laser light having a wavelength of 1064 nm and highly reflecting the half wavelength laser light having a wavelength of 532 nm is formed. On the side of the wavelength conversion element 55 facing the concave mirror 56, a film 65 having an antireflection function for the fundamental wavelength laser beam having a wavelength of 1064 nm and the half wavelength laser beam having a wavelength of 532 nm is formed.

  The concave mirror 56 has a concave surface on the side facing the wavelength conversion element 55, and this concave surface has a function of high reflection with respect to a fundamental wavelength laser beam with a wavelength of 1064 nm and antireflection with respect to a half wavelength laser beam with a wavelength of 532 nm. A film 66 is formed. As a result, the fundamental wavelength laser beam having a wavelength of 1064 nm resonates and is amplified between the film 62 of the solid-state laser element 54 and the film 66 of the concave mirror 56.

  In the wavelength conversion element 55, a part of the fundamental wavelength laser light having a wavelength of 1064 nm incident from the solid-state laser element 54 is converted into a half-wavelength laser light having a wavelength of 532 nm, and the fundamental wavelength of 1064 nm that has passed through the wavelength conversion element 55 without being converted is converted. The wavelength laser beam is reflected by the concave mirror 56 and is incident on the wavelength conversion element 55 again, and is converted into a half-wavelength laser beam having a wavelength of 532 nm. The half-wavelength laser light having a wavelength of 532 nm is reflected by the film 64 of the wavelength conversion element 55 and emitted from the wavelength conversion element 55.

  Here, the laser beam B1 incident on the wavelength conversion element 55 from the solid-state laser element 54, converted in wavelength by the wavelength conversion element 55, and emitted from the wavelength conversion element 55, and once reflected by the concave mirror 56 and converted in wavelength. In the state where the laser beam B2 incident on the element 55, reflected by the film 64 and emitted from the wavelength conversion element 55 overlaps with each other, the half-wavelength laser light having a wavelength of 532 nm and the fundamental wavelength laser light having a wavelength of 1064 nm interfere with each other. Cause output to drop.

  Therefore, here, the wavelength conversion element 55 is inclined with respect to the optical axis direction so that the laser light beams B1 and B2 do not overlap each other by the refraction action on the entrance surface and the exit surface. Interference between the wavelength laser beam and the fundamental wavelength laser beam having a wavelength of 1064 nm is prevented, so that a decrease in output can be avoided.

  The glass cover 57 shown in FIG. 2 is formed with a film that does not transmit these laser beams in order to prevent the excitation laser beam having a wavelength of 808 nm and the fundamental wavelength laser beam having a wavelength of 1064 nm from leaking to the outside. ing.

  FIG. 4 is a perspective view showing the image display device 1. FIG. 4A shows a storage state in which the movable body 12 is stored in the housing 11, and FIG. 4B shows the movable body 12 in the housing. 11 shows the state of use drawn from 11 respectively.

  Each housing of the optical engine unit 13 and the control unit 14 constituting the movable body 12 has a flat box shape with a short dimension in the height direction. Sliders 71 and 72 that slide along guide rails (not shown) provided in the casing 11 are provided on both side edges of the casings of the optical engine unit 13 and the control unit 14. In operation, as indicated by an arrow A, the movable body 12 is moved in and out of the housing 11.

  An exit window 74 is provided at the end of the optical engine unit 13 opposite to the hinge portion 73, and laser light that has passed through the projection optical system 28 (see FIG. 2) of the optical engine unit 15 from the exit window 74. Is emitted.

  As shown in FIG. 1, the storage space of the image display device 1 is open on the side surface of the casing 8 of the portable information processing device 2, and the side surface of the casing 8 of the portable information processing device 2 is open. The movable body 12 is taken in and out in a substantially orthogonal direction. The casing 11 of the image display device 1 is accommodated in the casing 8 of the portable information processing device 2, and in use, a part of the optical engine unit 13 and the control unit 14 is included in the casing 8 of the portable information processing device 2. It will be in the state which protruded to the side. The portable information processing device 2 is disposed so that the side surface thereof faces the screen S, whereby the exit window 74 provided in the optical engine unit 13 can be opposed to the screen S.

  As shown in FIG. 4, the optical engine unit 13 and the control unit 14 are coupled via a hinge 73, and in the use state shown in FIG. 4B, the control unit 14 guides the housing 11. While being supported by the rail, the optical engine unit 13 is completely removed from the housing 11, and as indicated by the arrow B, the optical engine unit 13 can be rotated in the vertical direction, and as indicated by the arrow C. In addition, the optical engine unit 13 can be rotated around the axis in the front-rear direction, that is, in the direction in which the movable body 12 is taken in and out. The configuration of the hinge portion 73 will be described in detail later.

  An operation unit 75 is provided on the upper surface of the control unit 14, and operation buttons for performing respective operations of power on / off, luminance switching, and keystone correction are arranged on the operation unit 75. In addition, a latch lock (not shown) is provided in the housing 11 in order to hold the movable body 12 in the storage position.

  FIG. 5 is a block diagram illustrating a schematic configuration of the image display apparatus 1. The control unit 81 of the image display device 1 controls the light source control unit 82 that controls the laser light source devices 22 to 24 of each color and the light modulation element 25 based on the video signal input from the portable information processing device 2. A light modulation element control unit 83, a power supply unit 84 that supplies power supplied from the portable information processing device 2 to the laser light source control unit 82 and the light modulation element control unit 83, and a main control unit that comprehensively controls each unit. 85. The control unit 81 is provided in the control unit 14.

  In the optical engine unit 15, in addition to the laser light source devices 22 to 24 for each color and the light modulation element 25, a photosensor 86 for detecting the amount of light incident on the light modulation element 25 and a temperature in the vicinity of the light modulation element 25 are detected. A temperature sensor 87 is provided. The optical engine unit 15 is provided in the optical engine unit 13. In addition to the optical engine unit 15, the optical engine unit 13 is provided with a cooling fan 88 that cools the optical engine unit 15.

  In order to transmit a video signal from the power supply line for supplying power from the portable information processing device 2 and the portable information processing device 2 to the casing 11 of the image display device 1 (see also FIG. 4). The interface unit 91 to which the signal line is connected is provided, and the interface unit 91 and the control unit 14 are connected by the wiring cable 92. The wiring cable 92 has flexibility and bends and deforms so as to follow the control unit 14 when the movable body 12 is taken in and out of the housing 11.

  The control unit 14 and the optical engine unit 13 are connected by a wiring cable 93. The wiring cable 93 includes a signal line for transmitting and receiving a signal between each unit in the control unit 81 and each unit in the optical engine unit 15 and a power supply line that supplies power to the cooling fan 88 and the like. . The wiring cable 93 is also flexible, and when the optical engine unit 13 is rotated with respect to the control unit 14, the wiring cable 93 is bent and deformed as the optical engine unit 13 is rotated.

  Although the control unit 81 is provided in the control unit 14 here, a part of the control unit 81, for example, the power supply unit 84, may be provided on the housing 11 side together with the interface unit 91.

  6 is a front view showing a state where the portable information processing device 2 is placed on a desk. FIG. 6A shows an initial state in which the movable body 12 is pulled out, and FIG. 6B shows an optical engine. The state which adjusted the angle of the unit 13 is each shown.

  As shown in FIG. 1, in the portable information processing device 2, an accommodation space for the image display device 1 is formed inside the housing 8 of the main body 3 where the keyboard 6 is disposed. Further, the casing 8 of the portable information processing device 2 is formed flat to improve portability. For this reason, as shown in FIG. 6A, when the portable information processing device 2 is placed on a desk, the image display device 1 is in a state of being close to the placement surface D on the desk. Therefore, in a state where the movable body 12 is pulled out, the laser beam emitted from the image display device 1 is blocked by the placement surface D, and the lower portion of the screen displayed on the screen S is missing. Thus, the screen cannot be properly projected on the screen S.

  Therefore, here, as shown in FIG. 6B, the optical engine unit 13 is supported by the control unit 14 so as to be rotatable in the vertical direction as indicated by an arrow B, and the laser light emitted from the image display device 1 is emitted. The projection angle of the laser beam can be adjusted so as not to be blocked by the mounting surface D. Thereby, it can be avoided that the lower part of the screen displayed on the screen S is lost.

  FIG. 7 is a side view showing a state where the portable information processing device 2 is placed on a desk. FIG. 7A shows an initial state of the optical engine unit 13, and FIG. 7B shows an optical engine unit. 13 shows a state in which the angle of 13 is adjusted.

  As shown in FIG. 7A, in the portable information processing apparatus 2, a frame (not shown) that supports the keyboard 6 and an internal control board (not shown) is provided along the upper surface 8a of the housing 8. The storage space for the image display device 1 is also formed along the upper surface 8 a of the housing 8. In addition, when the portable information processing device 2 is placed on a desk, the upper surface 8a of the housing 8 on which the keyboard 6 is disposed is inclined so that the front side is lowered with respect to the user. The accommodation space of the image display device 1 is also inclined along the upper surface 8a of the body 8.

  On the other hand, in the portable information processing device 2, the casing 8 is formed flat in order to improve portability, so that there is no room in the storage space of the image display device 1, and the image display device 1 is placed on the desk surface. The image display device 1 is attached to the portable information processing device 2 in a state where the image display device 1 is inclined with respect to the placement surface D. For this reason, the screen is displayed in an inclined state on the screen, and the screen cannot be appropriately displayed on the screen.

  Therefore, here, as shown in FIG. 7B, the optical engine unit 13 is rotated in a direction to correct the tilt of the screen on the screen as indicated by an arrow C. By setting the horizontal direction, the screen is displayed on the screen in an appropriate state in which the vertical direction and the horizontal direction of the screen are the horizontal direction and the vertical direction, respectively.

  FIG. 8 is a perspective view showing the hinge portion 73 in detail. The hinge portion 73 has an orthogonal biaxial structure, and a pair of first shaft members centered on the first rotation shaft at both ends in the longitudinal direction of the connecting member 101 extending in the width direction of the optical engine unit 13. 102 and 103 are connected, and the second shaft member 106 centering on the second rotation shaft is connected to the longitudinal center of the connecting member 101.

  The pair of first shaft members 102 and 103 are connected to a pair of mounting portions 104 and 105 provided on the casing of the optical engine unit 13, and the casing of the optical engine unit 13 is rotated around the first rotation axis. It is supported so that it can rotate. On the other hand, the second shaft member 106 is connected to the center position in the width direction of the housing of the control unit 14 and supports the connecting member 101 so as to be rotatable around the second rotation shaft.

  The first rotation shaft by the first shaft members 102 and 103 is arranged in the front-rear direction, that is, in the direction orthogonal to the moving-in / out direction of the movable body 12, and the optical axis of the laser light emitted from the emission window 74 is It becomes the direction orthogonal to. On the other hand, the second rotation shaft by the second shaft member 106 is disposed in a direction orthogonal to the first rotation shaft, and is parallel to the front-rear direction, that is, the moving-in / out direction of the movable body 12.

  Therefore, by rotating the optical engine unit 13 around the second rotation axis, the screen displayed on the screen can be rotated to correct the tilt of the screen, and the first rotation axis is in the horizontal direction. By adjusting so that a screen with no tilt can be obtained. Further, the angle of the laser beam emitted from the emission window 74 is increased or decreased by rotating the optical engine unit 13 around the first rotation axis after adjusting the first rotation axis to be in the horizontal direction. The screen displayed on the screen moves in the vertical direction accordingly. Accordingly, the screen can be displayed in an appropriate state at a required position on the screen without the screen being chipped or tilted. Note that the keystone correction of the screen is required in accordance with the vertical movement of the screen.

  A stopper 107 is provided in the vicinity of the second shaft member 106 to restrict the rotation of the connecting member 101 around the second rotation shaft relative to the control unit 14 within a predetermined range. One of the pair of first shaft members 102 and 103 is provided with a free stop mechanism, whereby the optical engine unit 13 is held in a stopped state at an arbitrary angle within a predetermined rotation range.

  The rotation of the optical engine unit 13 around the first rotation axis is also restricted by a stopper (not shown), and the optical engine unit 13 is substantially upright with respect to the control unit 14 from a position along the control unit 14. It can be turned to the position.

  The connecting member 101 is provided with openings 108 on both sides of the second shaft member 106 through which a wiring cable 93 (see also FIG. 5) serving as a signal line and a power supply line is inserted. . The wiring cable 93 is drawn out from the control unit 14 in the direction along the second rotation axis and drawn into the optical engine unit 13. The wiring cable 93 is composed of a flexible printed wiring board (FPC), a lead wire (for example, a vinyl-coated wire), or the like.

  FIG. 9 is an exploded view showing the state of the insertion region of the wiring cable 93 when the components on the optical engine unit 13 side are removed and the connecting member 101 of the hinge portion 73 is rotated about the second shaft member 106. Fig. 9 (A) shows the initial state of the connecting member 101, Fig. 9 (B) shows the state where the connecting member 101 rotates clockwise, and Fig. 9 (C) shows the connecting member rotating counterclockwise. Each state is shown.

  In the housing of the control unit 14, openings 111 through which the wiring cables 93 are inserted are provided on both sides of the second shaft member 106. The opening 111 on the control unit 14 side and the opening 108 on the connecting member 101 side overlap each other when viewed from the insertion direction of the wiring cable 93 as shown in the figure, so that an insertion region for the wiring cable 93 is formed.

  The insertion area of the wiring cable 93 is always inserted with a certain amount of play within the rotation range of the connecting member 101 regardless of the angle of the connecting member 101 that rotates about the second shaft member 106. The required size is ensured. As a result, it is not necessary to apply a load to the wiring cable 93 when the connecting member 101 rotates with respect to the control unit 14, so that the wiring cable 93 can be prevented from being damaged.

  FIG. 10 is a schematic perspective view showing an example of an image display device. FIG. 10A shows the image display device 1 according to the present embodiment, and FIG. 10B shows an image display device as a comparative example. FIGS. 10C and 10D show other forms of the image display device, respectively.

  In the example shown in FIG. 10B, the movable body 121 provided so as to be able to be inserted into and removed from the housing 11 is configured such that the optical engine unit 15 and the control unit 81 are accommodated in the same housing to form one unit. Since the movable body 121 simply moves in and out, the projection angle of the laser beam cannot be adjusted up and down. For this reason, when the portable information processing device is placed on a desk, the laser beam is blocked by the placement surface on the desk, and the lower part of the screen is cut off on the screen. Cannot project.

  In the example shown in FIG. 10C, a movable body 122 provided so as to be able to be inserted into and removed from the housing 11 includes a first unit 123 and a second unit 124 that supports the first unit 123 so as to be rotatable in the vertical direction. In the first unit 123, the optical engine unit 15 and the control unit 81 are accommodated. In this configuration, the projection angle of the laser beam can be adjusted up and down so that the laser beam is blocked by the mounting surface on the desk and the lower part of the screen is not cut off on the screen.

  However, in this configuration, since the optical engine unit 15 and the control unit 81 are provided in the first unit 123, the weight of the first unit 123 increases. In addition, the optical engine unit 15 is heavy because it is necessary to increase the rigidity of the casing 41 (see also FIG. 2) in order to accurately maintain the mutual positional relationship between the units. However, because the projection optical system 28 in the optical engine unit 15 is provided at the end opposite to the hinge unit 125, the optical engine unit 15 is disposed at a position away from the hinge unit 125. A large load is applied. For this reason, it is necessary to raise the intensity | strength of the hinge part 125, and manufacturing cost increases.

  In the example shown in FIG. 10D, a movable body 126 provided so as to be able to be taken in and out of the housing 11 includes a first unit 127 and a second unit 128 that supports the first unit 127 so as to be rotatable in the vertical direction. The optical engine unit 15 is provided in the first unit 127, and the control unit 81 is provided on the housing 11 side. In this configuration, since the first unit 127 can be reduced in weight by not providing the control unit 81 in the first unit 127, the load acting on the hinge unit 129 is reduced.

  However, in this configuration, the number of wires (signal lines and power supply lines) connecting the movable body 126 and the control unit 81 is increased. For this reason, the resistance when the wiring cable 130 bends and deforms with the moving in / out operation of the movable body 126 increases, and the smoothness of the moving in / out operation of the movable body 126 may be impaired.

  FIG. 11 is a schematic perspective view showing an example of a hinge part, FIG. 11A shows the hinge part 73 according to the present embodiment, and FIG. 11B shows another form of the hinge part.

  In the hinge portion 73 according to the present embodiment shown in FIG. 11A, the connecting member 101 is connected to the control unit 14 via a second shaft member 106 serving as a second rotating shaft, and the optical engine unit. 13 is connected via first shaft members 102 and 103 serving as a first rotation shaft.

  In this configuration, when the rotation of the optical engine unit 13 is adjusted, the optical engine unit 13 and the connecting member 101 are first rotated around the second rotation axis with respect to the control unit 14, and the optical engine unit 13 is horizontally As a state, the inclination of the screen on the screen is corrected, and then the optical engine unit 13 is rotated around the first rotation axis with respect to the connecting member 101 to adjust the projection angle of the laser beam on the screen in the vertical direction. That's fine.

  On the other hand, in the example shown in FIG. 11B, the connecting member 141 is connected to the control unit 14 via the first shaft members 142 and 143 serving as the first rotation shafts, and is connected to the optical engine unit 13. On the other hand, it is connected via a second shaft member 144 serving as a second rotation shaft.

  In this configuration, the optical engine unit 13 can be rotated around the second rotation axis to correct the tilt of the screen on the screen, but the first rotation axis cannot be adjusted in the horizontal direction. When the optical engine unit 13 is rotated around the first rotation axis, the screen moves obliquely on the screen. For this reason, displaying the screen appropriately without tilting to a required position on the screen is a rather troublesome task.

  In the above example, the hinge portion has an orthogonal biaxial structure, and the first unit (optical engine unit 13) rotates in two directions around the first rotation axis and the second rotation axis. The hinge unit has an orthogonal three-axis structure, and in addition to the first and second rotation axes, the first unit rotates in a direction orthogonal to them, that is, around the third rotation axis in the vertical direction. It is good also as a structure. In this way, as shown in FIG. 1, the side surface of the portable information processing device 2 does not need to face the screen S, and the positional relationship between the portable information processing device 2 and the screen S is not restricted. Convenience can be further enhanced.

  Although an example in which the image display device 1 according to the present invention is built in the portable information processing device 2 has been shown here, it can also be built in an electronic device such as another portable information terminal device.

  Further, in the above example, the image display device 1 is accommodated in the accommodation space of the portable information processing device 2 so as to be replaceable with the optical disc device. A configuration is also possible in which the device is accommodated in a state where it cannot be replaced with another device.

  In the above example, as shown in FIG. 1, the exit window 74 of the optical engine unit 13 is arranged toward the side of the portable information processing device 2 so that the portable information processing device 2 can be used in use. In addition to this, the side face is directly opposed to the screen S. In addition to this, the exit window of the optical engine unit is arranged toward the rear of the portable information processing apparatus, and the back surface of the portable information processing apparatus 2 is used at the time of use. The screen S may be directly opposed.

  In this case, the first rotation shaft for rotating the optical engine unit in the direction in which the projection angle of the laser beam with respect to the screen is changed in the vertical direction is set in a direction substantially parallel to the moving in / out direction of the movable body, that is, portable information. What is necessary is just to arrange | position in the direction substantially orthogonal to the side surface of the housing | casing of a processing apparatus. On the other hand, with this configuration, even when the image display device is attached to the information processing device in a state of being inclined with respect to the mounting surface on the desk, the screen on the screen does not tilt. The second rotation shaft for rotating the optical engine unit in the direction for correcting the inclination of the lens is not necessary.

  When the image display device according to the present invention is built in a portable information processing device and placed on a desk, the image is displayed on the screen in a state where the laser beam is blocked by the placement surface on the desk. This is effective in improving the convenience of the portable information processing apparatus in which the optical disk apparatus is accommodated in the drive bay.

1 Image display device 2 Portable information processing device (electronic equipment)
3 Body 6 Keyboard 8 Case, 8a Upper surface 12 Movable body 13 Optical engine unit (first unit)
14 Control unit (second unit)
DESCRIPTION OF SYMBOLS 15 Optical engine part 22 Green laser light source apparatus 23 Red laser light source apparatus 24 Blue laser light source apparatus 25 Light modulation element 28 Projection optical system 73 Hinge part 74 Output window 81 Control part 101 Connection member 102,103 1st axis member 106 2nd axis Element

Claims (1)

An image display device accommodated in a drive bay of a portable information processing apparatus so as to be replaceable with an optical disk device,
A housing attached to the drive bay;
A laser light source device for emitting laser light of each color;
A light modulation element that modulates laser light emitted from the laser light source device based on a video signal;
A projection optical system that projects the modulated laser light formed by the light modulation element onto a screen;
A control unit for controlling the laser light source device and the light modulation element;
A first unit that is provided so as to be able to be taken in and out of the housing and includes the laser light source device, the light modulation element, and the projection optical system, and the first unit can be rotated via a hinge portion A movable body configured with a second unit including the control unit to support,
When projecting an image on the screen, a part of the first unit, the hinge part, and the second unit of the movable body are sequentially pulled out from the housing and provided in the first unit. The exit window of the laser beam moves to the protruding position facing the screen,
The image display device characterized in that, at the protruding position, the hinge unit rotates the first unit in a direction to change the projection angle of the laser light emitted from the emission window in the vertical direction.

Images