JP5148519B2 - Projector device and mobile phone - Google Patents

Description

  The present invention relates to a projector device including a mechanism that suppresses camera shake when being used in a hand, and a mobile phone equipped with the projector device.

  A mobile phone equipped with a projector module that projects an image while being held in a hand is described in Patent Document 1. This mobile phone is a calibration function that adjusts the appearance of the projected image when using the projector function while it is held in the hand, as a focus function adjustment, brightness adjustment, white balance adjustment, keystone distortion correction. It has the function which can perform each.

  Japanese Patent Application Laid-Open No. 2004-228688 discloses a projector device that projects an image while being held by hand. This projector device projects an index image. The user reduces camera shake by maintaining the index image so as not to deviate from the edge of the screen.

JP 2006-91109 A JP 2005-326557 A

  However, Patent Document 1 does not discuss camera shake. Further, although Patent Document 2 discusses camera shake, the projector device does not include a mechanism that corrects camera shake by simply displaying an index image. That is, in the case of Patent Document 2, whether or not camera shake can be suppressed depends on the ability of the user to visually confirm the index image.

  A camera having a mechanism for correcting camera shake at the time of shooting is known. However, if the same mechanism as that of this camera is applied, it is necessary to separately provide a sensor and a drive unit, so that the configuration of the projector device becomes complicated.

  Therefore, the present invention provides a projector device capable of suppressing camera shake with a simple structure and a mobile phone equipped with the projector device.

  A projector device according to the present invention includes a main body, a video signal generation unit, a reflection mirror, a bearing unit, a lens unit, a counterweight, and an attenuator. The body forms an outer shell. The video signal generation unit includes at least a light source and a display element and emits a projected image. The reflection mirror is disposed on the emission optical axis of the light beam emitted from the video signal generation unit, and reflects and changes the light beam. The bearing unit supports the reflection mirror so as to freely rotate about the emission optical axis. The lens unit is disposed on the projection optical axis of the light beam reflected by the reflection mirror, rotates together with the reflection mirror, and projects a projection image toward the outside of the main body. The counterweight is disposed on the opposite side of the lens unit around the emission optical axis and has a mass that balances with the lens unit. The attenuator attenuates the angular deviation of the lens unit that occurs when the main body tilts around the emission optical axis.

  The projector apparatus according to the present invention can suppress camera shake when used by holding with a simple structure.

1 is a perspective view showing a projector device according to a first embodiment of the present invention. FIG. 2 is a plan view of the vicinity of a video signal generation unit and a lens unit of the projector device shown in FIG. 1. FIG. 3 is a perspective view in which a part of the main body is cut away so that the vicinity of the video signal generating unit and the lens unit shown in FIG. Sectional drawing of the vicinity of the lens unit shown in FIG. The side view which shows the use condition of the projector apparatus shown in FIG. The side view which shows typically the behavior of a lens unit when the main body of the projector apparatus shown in FIG. 1 inclines. The perspective view which cuts off a part of main body so that the video signal generation unit and lens unit vicinity of the projector apparatus of the 2nd Embodiment of this invention can be seen. Sectional drawing of the vicinity of the lens unit shown in FIG. The perspective view which shows the mobile telephone of the 3rd Embodiment of this invention.

  The projector device 1 according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, the projector device 1 includes a main body 10 that forms an outer shell, a video signal generation unit 11, a reflection mirror 12, a bearing unit 13, a lens unit 14, a counterweight 15, and an attenuator 16. The video signal generation unit 11 incorporates an LED that serves as a light source, a display element, a mirror, and the like. The video signal generation unit 11 is classified into a type using one white LED and a type using three LEDs, one each of red, green and blue LEDs. The video signal generation unit 11 emits a projection image formed by the display element.

  The reflection mirror 12 is disposed on the emission optical axis L1 of the light beam emitted from the video signal generation unit 11, reflects the light beam, and changes its direction to a substantially right angle. The bearing unit 13 includes a first bearing 131 and a second bearing 132 that are coaxial with the emission optical axis L1. The first bearing 131 is disposed between the video signal generation unit 11 and the reflection mirror 12. The second bearing 132 is disposed on the side beyond the reflecting mirror 12 in the direction in which the light beam is emitted. The bearing unit 13 rotatably supports the reflection mirror 12 around the emission optical axis L1.

  The lens unit 14 incorporates a lens group including a collimation lens and a field angle adjustment lens. The lens unit 14 is arranged on the projection optical axis L2 so that the lenses are arranged coaxially with the projection optical axis L2 of the light beam reflected by the reflection mirror 12. The lens unit 14 is attached to the bearing unit 13 so as to rotate integrally with the reflection mirror 12. A front end portion 141 of the lens unit 14 is inserted into a hole 101 provided in the main body 10 and exposed outside the main body 10 as shown in FIG. The projected image M is projected from the lens unit 14 toward the projection surface S prepared outside the main body 10 (see FIG. 5).

  The counterweight 15 is attached to the bearing unit 13 opposite to the lens unit 14 with the emission optical axis L1 as the center. The counterweight 15 has a mass that is substantially balanced with the lens unit 14 by the bearing unit 13. The attenuator 16 attenuates an angular shift of the lens unit 14 with respect to the main body 10 caused by the main body 10 tilting about the emission optical axis L1. As shown in FIGS. 3 and 4, the attenuator 16 is configured, for example, by sandwiching the counterweight 15 with coil springs 161 and 162 from both sides in the rotational direction of the bearing unit.

  The spring constants of the coil springs 161 and 162 may be the same or different. Instead of the coil springs 161 and 162, the counterweight 15 may be supported by a leaf spring, or a spiral spring may be provided in the bearing unit 13. It is also preferable to further provide a damper in addition to the coil springs 161 and 162. The damper may be a friction set on the first bearing 131 or the second bearing 132. The projector device 1 further includes a printed circuit board, a storage medium, a connection port, a speaker, a battery, and the like on which a video processing and a control unit of a video signal generation unit are mounted in the main body 10.

  The projector device 1 configured as described above is used by being held in a hand as shown in FIG. In general, since humans slightly shake due to pulsation or the like, it is extremely difficult to hold the projection image M projected from the projector device 1 at one place on the projection surface S. In the case as shown in FIG. 5, the vertical movement around the elbow E bent against the gravity can be a major factor of camera shake. In other words, when the projector device held in the hand does not have a camera shake prevention function, the projected image projected is a slight rotation angle even when the forearm A rotates up and down around the elbow E. In this case, the angle is greatly shifted in proportion to the distance to the projection surface.

  However, the projector device 1 has a structure in which the reflection mirror 12 and the lens unit 14 are freely rotated around the emission optical axis L1. Therefore, even if the main body 10 is rotated in the vertical direction by moving the forearm A ahead of the elbow E, as shown in FIG. Then, the main body 10 rotates in a direction opposite to the direction in which the main body 10 rotates. That is, regardless of whether the main body 10 is rotated to the lower position P2 indicated by the one-dot chain line or the upper position P3 indicated by the two-dot chain line with respect to the initial position P1 indicated by the solid line in FIG. The angle is rotated so as to cancel the angle change, and is translated in the vertical direction.

  As a result, the projection optical axis L2 of the projected light beam only needs to be substantially parallel. Therefore, the amount of shaking of the projection image M on the projection surface S can be minimized without the amount of camera shake being amplified by the distance to the projection surface S even if camera shake occurs. In FIG. 6, for convenience of explanation, the main body 10 is illustrated as being largely rotated with respect to the vertical dimension. Therefore, the amount by which the main body 10 rotates due to actual camera shake is smaller.

  Further, the counterweight 15 may be provided at a mass such that the lens unit 14 is slightly heavier around the emission optical axis L1. In this way, when the main body 10 moves in the vertical direction, it is opposite to the moving direction of the main body 10 due to the moment of inertia around the bearing unit 13 acting on the reflecting mirror 12, the lens unit 14, and the counterweight 15. It becomes easy for the front-end | tip part 141 of the lens unit 14 to face in this direction. That is, even if the main body 10 moves in the vertical direction, the lens unit 14 rotates so as to maintain the position of the projection image M projected on the projection surface S. As a result, in addition to the angle difference when the main body 10 is tilted about the emission optical axis L1, blur due to the main body 10 moving in the vertical direction can also be corrected.

  As described above, the projector device 1 has a simple structure in which the reflection mirror 12 and the lens unit 14 are supported by the bearing unit 13 so as to freely rotate. Can be suppressed.

  Next, a projector device 1 according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 7 and 8, the projector device 1 is different from the projector device 1 of the first embodiment in the arrangement of coil springs 161 and 162 serving as the attenuator 16. Other configurations have the same functions as those of the projector device 1 according to the first embodiment.

  In the projector device 1, the attenuator 16 is disposed on the lens unit 14 side. In order to adjust the sharpness of the projection image M according to the distance to the projection surface S, the lens unit 14 is moved along the projection optical axis L2. The correction angle of the lens unit 14 with respect to camera shake should be adjusted according to the distance to the projection surface S. That is, according to the projector device 1 of the present embodiment, since the attenuator 16 is arranged on the lens unit 14 side, the position of the lens unit 14 is moved and the position of the attenuator 16 is also adjusted in order to adjust the sharpness. By moving, the correction amount can be easily adjusted according to the distance to the projection surface S.

  A mobile phone 2 according to a third embodiment of the present invention will be described with reference to FIG. This mobile phone 2 is a so-called foldable type in which a main body 10 in which a printed circuit board or the like is incorporated and an operation button 102 is arranged on a surface and a display unit 20 in which a display device 21 is incorporated are rotatably connected. It is a mobile phone. The mobile phone 2 is equipped with the projector device 1 of the first embodiment.

  That is, the mobile phone 2 includes at least a video signal generation unit 11, a reflection mirror 12, a bearing unit 13, a lens unit 14, a counterweight 15, and an attenuator 16 having the same mechanism as that of the projector device 1 of the first embodiment. Yes. Therefore, the arrangement and detailed description of these configurations are shown in FIGS. 2 to 4 illustrating the interior of the projector device 1 of the first embodiment, or FIG. 7 illustrating the interior of the projector device 1 of the second embodiment. The description here will be omitted as referring to FIG. In addition to this, a communication function as a mobile phone, a camera unit 17 for photographing video, a printed circuit board for controlling these, a display screen, a battery, a memory, and the like are also provided.

  The mobile phone 2 can project a recorded image taken by the camera unit 17 as a projection image M. The attenuator 16 may be disposed on the lens unit 14 side as in the projector device 1 of the second embodiment. Further, instead of incorporating the projector device 1, it may be structured to be connected to a mobile phone as a separate unit.

  Note that the mobile phone may be any type of mobile phone, such as a slide type or a bar shape, in addition to the folding type as in the third embodiment. Further, a reception function and a recording function of terrestrial digital wave broadcasting may be incorporated, and a function of projecting a recorded program as a projection image M may be provided.

  DESCRIPTION OF SYMBOLS 1 ... Projector apparatus, 2 ... Mobile phone, 10 ... Main body, 11 ... Video signal generation unit, 12 ... Reflection mirror, 13 ... Bearing unit, 14 ... Lens unit, 15 ... Counterweight, 16 ... Attenuator, 17 ... Camera unit , L1 ... emission optical axis, L2 ... projection optical axis, M ... projection image, S ... projection plane.

Claims (4)

A body forming an outer shell;
A video signal generation unit that includes at least a light source and a display element and emits a projected image; and
A reflection mirror disposed on the exit optical axis of the light beam emitted from the video signal generation unit to reflect and redirect the light beam;
A bearing unit that freely supports the reflection mirror around the emission optical axis;
A lens unit that is disposed on the projection optical axis of the light beam reflected by the reflection mirror, rotates together with the reflection mirror, and projects the projection image toward the outside of the main body;
A counterweight disposed on the opposite side of the lens unit around the exit optical axis and having a mass balanced with the lens unit;
A projector device comprising: an attenuator for attenuating an angular deviation of the lens unit caused by tilting the main body about the emission optical axis.   The projector device according to claim 1, wherein the attenuator is disposed on the counterweight side.   The projector device according to claim 1, wherein the attenuator is disposed on the lens unit side. A body forming an outer shell;
A video signal generation unit that includes at least a light source and a display element and emits a projected image; and
A reflection mirror disposed on the exit optical axis of the light beam emitted from the video signal generation unit to reflect and redirect the light beam;
A bearing unit that freely supports the reflection mirror around the emission optical axis;
A lens unit that is disposed on the projection optical axis of the light beam reflected by the reflection mirror, rotates together with the reflection mirror, and projects the projection image toward the outside of the main body;
A counterweight disposed on the opposite side of the lens unit around the exit optical axis and having a mass balanced with the lens unit;
A mobile phone comprising: an attenuator for attenuating an angular deviation of the lens unit caused by the tilting of the main body about the emission optical axis.

Images