JP2009009071A - Projector having support-leg - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector that is easy to carry and is capable of easily projecting an image even in a place where there is no desk or base to set a projector on. <P>SOLUTION: The projector having support-leg 1 has an image projecting section 2 and a support leg 3 for supporting the image projecting section 2, and projects an image toward a screen from the image projecting section 2 with the support leg 3 erected. The support leg 3 has a support part that makes it possible to change the projecting direction of an image projected from the image projecting section 2. In addition, the elevation angle of projection light 7 projected from the image projecting section 2 can be changed by rotating the image projecting section 2 around the support part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image projection apparatus that projects an image on a screen. In particular, the present invention relates to a projector in which a support leg and an image projection unit are integrally formed.

  Projectors that allow a large number of people to view a projected image by enlarging a presentation or video in a conference on a large screen have become widespread. Usually, a projector and a screen for projecting and visualizing an image from the projector are separated from each other. Then, a projector is installed on a desk or the like, and an image is projected on a screen installed on a wall surface or the like. The projector is usually installed on the side of observing the image. If the projector is not projected, the projector may get in the way. Also, the projector and the screen are usually separated. Therefore, when projecting an image on a screen, it is necessary to project a test image on the screen in advance and adjust the size, focus, and tilt of the image each time the projector is used. As these measures, there is known a usage mode in which a projector is connected to a wall surface and stored in a storage case when not in use (see, for example, Patent Document 1).

FIG. 14 shows a projector usage mode described in Patent Document 1. FIG. 14A shows a state during use, and FIGS. 14B and 14C show a state during storage. In use, the projection light 103 is projected onto the wall surface 104 from the aspherical mirror 102 of the projector 100 installed on the rotating plate 101. The rotating plate 101 is attached to the projector housing 106 with a rotating shaft 105. At the time of storage, the rotary plate 101 and the projector 100 are rotated 90 degrees around the rotary shaft 105 and stored in the projector storage housing 106. As described above, when the projector 100 is not used, the projector 100 is stored in the projector housing 106 so that the projector 100 does not get in the way during a conference or the like.
JP 2004-252282 A

  However, in the projector system described in Patent Document 1, the projector, the rotating plate that holds the projector, and the projector housing are integrally configured with the facility where the system is installed. For this reason, the screen that can be projected is narrow because the housing case is obstructive, and the projection distance cannot be set freely.

  The present invention has been made to solve the above-described problems, and details thereof will be described below.

  The invention according to claim 1 includes an image projection unit and a support leg that supports the image projection unit, and includes a support leg that projects the image from the image projection unit toward the screen by standing the support leg. In the projector, the support leg supports the image projection unit in the vicinity of one end thereof, includes a fulcrum part in the vicinity of the other end, and rotates the support leg around the fulcrum part, so that at least the A projector with a supporting leg that can change the distance between the image projection unit and the screen.

  According to a second aspect of the present invention, the support leg includes at least two support legs, and the two support legs are connected to each other between the image projection unit and the fulcrum unit so as to be rotatable. The projector with a support leg according to claim 1.

  According to a third aspect of the present invention, the image projection unit is connected to one end side of the support leg, and the other end side of the support leg is in contact with a plane including the screen. The projector with supporting legs according to claim 1, wherein the projector has a support portion.

  According to a fourth aspect of the present invention, the support leg is rotatably connected to a fixed part positioned with respect to the screen at the fulcrum part, and the support leg rotates around the fulcrum part. The projector with a supporting leg according to claim 1, wherein a distance between the image projection unit and the screen is changed.

  The invention according to claim 5 is characterized in that the fixed portion and the support leg are pivotally supported on an axis substantially parallel to a plane including the screen. A projector with supporting legs according to claim 4.

  According to a sixth aspect of the invention, in the projector with supporting legs according to the fourth or fifth aspect, the fixing portion is installed on a floor surface.

  The invention according to claim 7 is the projector with supporting legs according to claim 4 or 5, wherein the fixing portion is installed on a part of a wall forming the screen. .

  In the invention according to claim 8, the image projection unit is connected to one end side of the support leg, and the other end side of the support leg moves relative to a standing surface on which the support leg stands. The projector with supporting legs according to claim 1, further comprising a movable portion capable of supporting.

  In the invention which concerns on Claim 9, the said image projection part is connected with respect to the said support leg so that rotation is possible, The support leg with any one of Claims 1-8 characterized by the above-mentioned. A projector was used.

  In the invention which concerns on Claim 10, the said support leg has the 1st fulcrum part located in the one end side, and the 2nd fulcrum part located in the other end side, The said image is in said 1st fulcrum part. The projector with supporting legs according to claim 9, wherein the projector is rotatably connected to the projection unit, and is rotatably connected to a fixing unit positioned with respect to the screen at the second fulcrum portion. .

  In the invention which concerns on Claim 11, rotation of the said support leg with respect to the said fixing | fixed part in a said 2nd fulcrum part and rotation of the said image projection part with respect to the said support leg in a said 1st fulcrum part are mutually predetermined. The projector with a supporting leg according to claim 10, further comprising an interlocking mechanism that rotates in a reverse direction while maintaining the relationship.

  In the invention which concerns on Claim 12, before and after the angle change by the rotation between the said fixing | fixed part in the said 2nd fulcrum part and the said support leg, the position in the said screen of the lower end part of the said projection image is substantially constant. The projector with supporting legs according to claim 10 or 11, wherein the projector has supporting legs.

  According to a thirteenth aspect of the present invention, the image projection unit detects a tilt of the standing support leg or a tilt of the image projection unit, and corrects a deformation of the projection image caused by the tilt. 11. The apparatus according to claim 1, further comprising: a correction unit that changes a projection direction or corrects a projection image by the correction unit based on inclination information from the detection unit. A projector with supporting legs was used.

  The invention according to claim 14 is the projector with supporting legs according to claim 13, wherein the detecting means is an angle sensor for detecting the inclination of the image projection unit.

  According to a fifteenth aspect of the invention, in the projector with a support leg according to the thirteenth aspect, the detection means is a rotary encoder that detects an inclination of the support leg with respect to the fulcrum portion.

  According to the first aspect of the present invention, there is provided a projector with a support leg that includes an image projection unit and a support leg that supports the image projection unit, and projects the image from the image projection unit by standing the support leg. The leg supports the image projection unit in the vicinity of one end thereof, and includes a fulcrum unit in the vicinity of the other end. By rotating the support leg around the fulcrum unit, the leg is at least between the image projection unit and the screen. It is a projector apparatus with a support leg which enables further distance of this. As a result, even in an environment where there is no desk or the like on which the projector is installed, the support leg can be erected and an image can be projected easily, and the convenience of easily adjusting the distance of the projection light can be achieved. Have.

  According to the invention of claim 2, the support leg has at least two legs, and the two support legs are connected to each other between the image projection part and the fulcrum part so as to be rotatable. Thereby, while having a support leg stably standing, it has the convenience which can adjust the elevation angle of projection light easily.

  According to the third aspect of the present invention, the image projecting portion is connected to one end side of the support leg, and the other end side of the support leg has an abutting portion capable of abutting against a plane including the screen. Thus, by setting the size and focus of the projection image in advance, there is an advantage that it is possible to save the trouble of adjusting the focus and adjusting the size of the projection image.

  According to the invention of claim 4, the support leg is rotatably connected to the fixed part positioned with respect to the screen at the fulcrum part, and the support leg rotates around the fulcrum part to project an image. The distance or angle between the screen and the screen was changed. Thereby, it has the advantage that the distance and angle between a screen and an image projection part can be changed simply.

  According to the invention of claim 5, the fixing portion and the support leg are pivotally supported by an axis substantially parallel to a plane including the screen. Thereby, since only the elevation angle of the projection image is changed by rotating the support leg, the distance and angle between the image projection unit and the screen can be changed more easily and easily. Have advantages.

  According to invention of Claim 6, the fixing | fixed part is installed in the floor surface. Thereby, since the distance and projection direction between a screen and an image projection part are decided, it has the advantage that adjustment of a projection image can be performed more easily.

  According to invention of Claim 7, a fixing | fixed part is installed in a part of wall which a screen comprises. Accordingly, there is no need to secure a space for installing the projector in the room, so that there is an advantage that the room can be used effectively.

  According to the eighth aspect of the present invention, the image projection unit is connected to one end side of the support leg, and the movable unit is movable to the standing surface on which the support leg stands on the other end side of the support leg. It has. This has the convenience that the projector can be easily moved after standing on the floor or the like.

  According to invention of Claim 9, the image projection part is connected with respect to the support leg so that rotation is possible. Accordingly, the projection direction of the projection light can be adjusted by moving the support leg, and also by rotating the image projection unit with respect to the support leg. Can be easily set.

  According to the invention of claim 10, the first fulcrum portion located on one end side of the support leg and the second fulcrum portion located on the other end side of the support leg are provided, and image projection is performed at the first fulcrum portion. The second fulcrum part is pivotally connected to a fixed part positioned with respect to the screen. In addition to being able to set the projection direction of the image projection unit independently at the first fulcrum part, it is possible to change the distance and angle between the image projection part and the screen by tilting the support leg at the second fulcrum part. It has the convenience that the image can be finely adjusted.

  According to the eleventh aspect of the present invention, the rotation of the support leg relative to the fixed portion at the second fulcrum portion and the rotation of the image projection portion relative to the support leg at the first fulcrum portion are reversed while maintaining a predetermined relationship. An interlocking mechanism that rotates in the direction is provided. Accordingly, the direction of the projection light projected from the projection image portion when the support leg is rotated around the first fulcrum portion can be limited to a specific range, so that the user can project the projection image. This has the advantage that the direction can be set quickly and easily.

  According to the twelfth aspect of the present invention, the position of the lower end portion of the projected image on the screen is substantially constant before and after the angle change caused by the rotation between the fixed portion and the support leg at the second fulcrum portion. Thereby, even when the support leg is rotated, the projected image does not come off from the lower end of the screen and is lost, and the user can quickly set a projected image of a necessary size. Convenience.

  According to the thirteenth aspect of the present invention, the detecting means for detecting the inclination of the supporting leg to be erected or the inclination of the image projecting portion accompanying this, and the correcting means for correcting the deformation of the projected image caused by the inclination. The projection direction is changed by the correction unit based on the inclination information from the detection unit, or the projection image is corrected. Thereby, when the support leg is rotated, it is possible to prevent an unnatural image from being difficult to see due to deformation of the projection image.

  According to the invention of claim 14, the detecting means is an angle sensor for detecting the inclination of the image projection unit. Thereby, for example, the elevation angle of the projection light can be detected.

  According to the invention of claim 15, the detecting means is a rotary encoder for detecting the inclination of the support leg with respect to the fulcrum portion. Thereby, the inclination angle of the support leg can be detected by an inexpensive device, and the cost of the projector can be reduced.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a schematic side view showing a state in which a projector 1 with a support leg (hereinafter referred to as projector apparatus 1) according to a first embodiment of the present invention is erected on a floor 6 and a projection image is projected onto a wall. Represents the figure. In FIG. 1, the projector apparatus 1 includes an image projection unit 2 and two support legs 3 a and 3 b that connect and support the image projection unit 2. The support leg 3a and the support leg 3b are rotatably connected by a shaft 4, and the image projection unit 2 is supported by the support leg 3a on the side on which an image is projected. The support legs 3 a and 3 b are installed on the floor 6, the other end 57 of the support leg 3 a is brought into contact with the wall 5 as a screen, and the projection light 7 is projected onto the wall 5 by the image projection unit 2. In FIG. 1, as indicated by the broken line, the projection line 7 ′ is projected from the image projection unit 2 ′ in the state of the support legs 3′a and 3′b, and the projected image 8 ′ is displayed. As shown, the other end 57 of the support leg 3a is used as a fulcrum, and the support legs 3a and 3b are opened to project the projection light 7. Note that the optical axis 9 of the projection light 7 when the support legs 3a and 3b are opened with respect to the center (hereinafter referred to as the optical axis) 9 'of the projection light 7' on the support legs 3'a and 3'b is The elevation angle increases, and the distance between the image projection unit 2 and the screen increases.

  In addition, when the support leg 3a and the support leg 3b rotate about the shaft 4, the support legs 3a and 3b are stabilized after opening and closing by generating appropriate rotational friction. Further, a tightening knob for tightening the support leg 3a and the support leg 3b on the shaft 4 can be installed so that stress adjustment for opening and closing can be performed. Accordingly, the tightening knob is loosened to open and close the support legs 3a and 3b, and the knob is tightened when fixing. Thereby, the projector apparatus 1 can be stabilized more. Moreover, a hook member can be provided in each intermediate part of support leg 3a, 3b, and it can fix so that the opening / closing angle of support leg 3a, 3b can be adjusted. Further, the provision of a wheel or the like at the end of the support legs 3a, 3b that contacts the floor 6 facilitates the movement of the projector device 1.

  In FIG. 1, the ends of the support leg 3a and the support leg 3b are rotatably connected by the shaft 4, but instead of this, a shaft 4 as a fulcrum is installed in the middle part of the support leg 3a. The support leg 3b may be rotatably connected. Further, instead of the configuration in which the image projection unit 2 is supported by the two support legs 3a and 3b, the image projection unit 2 may be configured by three or four support legs or two plate-like support legs. Moreover, in the said 1st Embodiment, it may replace with the axis | shaft 4 as a fulcrum part, and a ball joint may be sufficient. In the first embodiment, the image projection unit 2 is fixed to the support leg 3a. Instead, the image projection unit 2 may be rotatably supported by the shaft 4 and supported. Good. The point is that the image projection unit 2 is connected to the support leg 3a or the support leg 3b so that the distance between the screen of the projection light 7 projected from the image projection unit 2 and the image projection unit 2 can be changed. That's fine.

  As described above, since the support legs 3a and 3b are connected to the image projection unit 2, it is easy to carry and easily projects an image even in an environment where there is no desk or table on which the projector is installed. be able to. Further, the distance between the image projection unit 2 and the screen can be easily changed by abutting the other end 57 of the support leg 3a on the wall 5 and opening and closing the support legs 3a and 3b. Thus, the projection image 8 can be easily enlarged or reduced.

<Second Embodiment>
FIG. 2A is a perspective view showing a state in which an image is projected by the projector device 1 according to the second embodiment of the present invention. FIG. 2B is an enlarged view of the portion A. The same reference numerals are assigned to the same parts or parts having the same function.

  The projector device 1 includes a support leg 3, an image projection unit 2 installed on one end side of the support leg 3, and a bottom plate 56 on which the support leg 3 is erected. The other end side of the support leg 3 is pivotally supported by the fixing portions 11a and 11b fixed to the bottom plate 56 via a rotation shaft 14 as a fulcrum portion. The bottom plate 56 is in contact with the wall 5 constituting the screen. As shown in FIG. 2B, the fixed portion 11a includes an inclination adjusting hole 12 for locking the support leg 3 to the fixed portion 11a. Further, a stopper 13 made of a screw for locking the support leg 3 is fixed to the support leg 3. The stopper 13 passes through the inclination adjustment hole 12 and is fixed to the support leg 3. The image projection unit 2 displays a projection image 8 by projecting projection light 7 onto a wall 5 as a screen. The elevation angle of the projection light 7 projected from the image projection unit 2 changes by an angle θ by loosening the screw formed of the stopper 13 and inclining the support leg 3 with the rotation axis 14 as the rotation center, for example, by the angle θ. Thereby, the distance between the image projection part 2 and the wall 5 as a screen increases, and the projection image 8 is expanded. Here, the projection light 7 has an optical axis 9, and the center point O formed by the intersection of the optical axis 9 and the wall 5 as a screen is the center of the projection image 8.

  In the present embodiment, the fixing portions 11 a and 11 b are installed on the bottom plate 56. The projector apparatus 1 in which the support leg 3 and the image projection unit 2 are integrally formed is carried, and one end of the bottom plate 56 is placed in contact with the wall 5 as shown in FIG. The fixing portions 11 a and 11 b fix the fixing portions 11 a and 11 b so that the contact side where the bottom plate 56 contacts the wall 5 and the axis 15 formed by the rotation shaft 14 of the support leg 3 are parallel to each other. By bringing the bottom plate 56 into contact with the wall 5, the distance L between the wall 5 and the axis 15 is determined. Further, the image projection unit 2 has a height H with respect to the axis 15. Therefore, when the support leg 3 is tilted about the rotation axis 14, the distance between the center point O of the projection image 8 projected on the screen and the image projection unit 2 is determined. When the projector apparatus 1 is not used, the projector apparatus 1 can be easily moved for each bottom plate 56, so that the installation environment can be effectively used for other purposes.

  In addition, although fixed part 11a, 11b and the support leg 3 were connected so that rotation was possible by the rotating shaft 14, you may connect the support leg 3 to the baseplate 56 with a ball joint etc. instead. In this case, the support leg 3 can be rotated even in a horizontal plane, and a projection image can be projected so as to be rotatable in the horizontal direction in addition to the elevation angle.

  Further, by attaching a rotary encoder to the support leg 3, it is possible to detect the inclination angle of the support leg 3 with respect to the surface of the bottom plate 56 (the surface of the floor 6). As will be described in detail later, the distance between the center point O of the projection image 8 and the image projection unit 2 can be calculated by detecting the inclination angle of the support leg 3. Based on the calculated distance, it is possible to automatically correct the shape of the projected image and adjust the focus.

  With this configuration, the projector can be easily installed even in an environment where there is no table or desk for installing the projector, and the projection direction of the projection light 7 by the projector device 1 The distance between the screen surface and the image projection unit 2 can be easily changed, and an image can be projected easily and quickly.

  Next, referring to FIGS. 3 and 4, when the projection image 8 is deformed due to the inclination of the support leg 3 or the inclination of the image projection unit 2, the projector device 1 having a function of correcting the deformation of the projection image 8. Will be explained.

<Third Embodiment>
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, the projector device 1 has a function of performing keystone correction on a projected image. FIG. 3A is a perspective view illustrating a state in which the projector apparatus 1 described in the second embodiment is tilted and an image is projected, and FIG. 3B is a diagram illustrating the image projected in FIG. FIG. 3C is a perspective view for explaining a projected image when keystone correction is performed, FIG. 3C is an enlarged view of a portion A, and FIG. 4 is a functional block diagram of the projector device 1. The same reference numerals are assigned to the same parts or parts having the same function.

  In FIG. 3A, the stopper 13 is loosened, and the support leg 3 is tilted by an angle δ (for example, about 10 °) from the vertical direction with the rotation shaft 14 as the center of rotation, and the stopper 13 is tightened and locked. Since the image projection unit 2 is also tilted by tilting the support leg 3 by the angle δ, the elevation angle between the optical axis 9a of the projected projection light 7 and the horizontal plane is also increased by the angle δ. Along with this, the projected image 8a expands upward in a trapezoidal shape, and depending on the setting conditions of the projector device 1, the upper side of the projected image 8a is detached from the wall 5 as a screen, and a partly missing deformation is very difficult to see. May be an image.

  FIG. 3B shows a state in which the trapezoidal correction is performed on the image to be projected while the support leg 3 and the image projection unit 2 maintain the inclination shown in FIG. The center point Oa, which is the intersection point between the optical axis 9a of the projection light 7a and the wall 5 in FIG. 3A, and the center point, which is the intersection point between the optical axis 9b and the wall 5 of the projection light 7b shown in FIG. It is the same as Ob. In FIG. 3B, a corrected projection image 8 b that has been subjected to trapezoidal correction image processing in the image projection unit 2 is projected.

  Next, trapezoidal correction of the projected image 8 by the image projection unit 2 will be described with reference to FIG. The image projection unit 2 includes a control unit 20 for controlling the operation of the projector device 1, a CPU 21 included in the control unit 20, a RAM 22 as a work area of the CPU 21, a ROM 23 for storing a control program for the image projection unit 2, and the like. A video signal input circuit 24 that receives a video signal and demodulates an image signal and a synchronization signal, an image data processing circuit 25 that inputs a video signal and image data and performs image processing, and inputs the processed image data to the LCD 31. An LCD driving circuit 26 for displaying an image, a light source 29, an illumination optical system 30 for condensing light from the light source 29 and irradiating the light onto the LCD 31, and a screen for irradiating the screen with projection light modulated into image light from the LCD 31 The imaging optical system 34, the USB I / F 32 for exchanging data with an external device, the support leg 3 or the image projection unit 2 are installed on the support leg 3 Is composed of a bus 35 for performing inclination sensing means 33, and the transfer of control signals and data to detect a tilt of the image projection unit 2. As will be described later, the focus adjustment mechanism 27 has a function of adjusting the focus of the projection image 8 projected from the imaging optical system 34, and the lamp driving circuit 28 has a function of adjusting the light emission luminance of the light source 29.

  Here, as the inclination detecting means 33, a gyro sensor as an angle sensor is used. A semiconductor sensor or an optical fiber sensor can be used as the gyro sensor. Projection projected from the image projection unit 2 by tilting the support leg 3 ′ (see FIG. 3C) standing vertically by an angle δ about the rotation axis 14 (see FIG. 3C). The elevation angle of the optical axis 9a of the light 7 increases by an angle δ. The inclination detection means 33 detects the inclination of the support leg 3 or the image projection unit 2 and generates inclination information. The video signal input circuit 24 that receives the video signal demodulates the video signal to the image data processing circuit 25 and outputs the image data. The image data processing circuit 25 stores the input image data in association with the position of the image in a buffer memory (not shown) or the like. The control unit 20 performs a trapezoidal correction process on the image data stored in the buffer memory or the like based on the tilt information from the tilt detection unit 33. In the trapezoidal correction, as shown in FIG. 3B, the image data in the horizontal direction and the vertical direction are compressed from the lower part to the upper part of the projection image 8b. The corrected image data is output from the image data processing circuit 25 to the LCD drive circuit 26 and is viewed at the LCD 31. Then, it is projected onto the screen by the imaging optical system 34 and corrected as in the projected image 8b. Therefore, the control unit 20 or the image data processing circuit 25 serves as a keystone correction unit. By performing this trapezoidal correction, it is possible to project a projection image 8b that is easy to see from the observer. The image data input by the image data processing circuit 25 may be input from the outside via the USB I / F 32, or may be image data stored in the RAM 22 of the control unit 20 or a storage unit (not shown). Also good. Further, although the image data is visualized using the LCD 31, a DMD (digital mirror device) or the like may be used.

  As the angle sensor, a rotary encoder installed between the fixing portions 11a and 11b and the other end of the support leg 3 can be used. Compared with a gyro sensor or the like, if a rotary encoder is used, the angle of the support leg 3 with respect to the installation surface can be configured easily and inexpensively.

  Further, the trapezoidal correction of the projection image 8a has been described by taking the projector apparatus 1 shown in FIG. 3 as an example, but it goes without saying that the keystone correction can be applied to the projector apparatus 1 in the already described first embodiment.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the fourth embodiment, luminance correction means for correcting the brightness of the projection image 8b based on inclination information from the detection means for detecting the inclination of the support leg 3 or the inclination of the image projection unit 2, and / or It is a projector apparatus 1 provided with a focus adjustment means for adjusting the focus of the projection image 8b.

  As shown in FIG. 3A, when the support leg 3 is inclined, for example, by an angle δ from the vertical direction, the optical axis 9 (see FIG. 2A) is moved upward as shown by the optical axis 9a (see FIG. 3A). Move to. Therefore, the center point O (see FIG. 2A) of the projection image of the wall 5 as a screen moves to the center point Oa (see FIG. 3A), and the center point Oa and the image projection unit 2 are moved. The distance between them increases. Therefore, the brightness of the projected image 8b is increased based on the inclination information from the inclination detecting means 33.

  Specifically, a lamp driving circuit 28 for adjusting the light emission luminance of the light source 29 is provided. The lamp driving circuit 28 can adjust the output power by the control unit 20. The control unit 20 adjusts the light emission luminance of the light source 29 by increasing / decreasing the output power of the lamp driving circuit 28 based on the inclination information from the inclination detecting means 33, and makes the luminance of the projected image 8a substantially constant. In this case, since the projection image 8a is projected obliquely upward with respect to the wall 5, it is difficult to make the luminance constant in the entire projection image 8a, but at least the central point Oa of the projection image 8a is controlled to be substantially constant. To do. In this way, it is possible to prevent the brightness of the projected image 8a from changing as the support leg 3 is tilted from the vertical direction. In the above case, the control unit 20 or the lamp driving circuit 28 corresponds to the luminance correction unit.

  In addition, installation information of the projector device 1 such as the distance L between the wall 5 and the axis 15 and the height H from the axis 15 of the image projection unit 2 is stored in a storage unit such as the RAM 22 in advance. Calculates the change in the distance between the center point Oa and the image projection unit 2 due to the inclination of the support leg 3 from the installation information and the inclination information from the inclination detecting means 33, and based on the calculation result, the lamp driving is performed. The power supplied to the light source 29 of the circuit 28 may be controlled.

  Similarly, the control unit 20 controls the focus adjustment mechanism 27 based on the tilt information from the tilt detection unit 33 to adjust the focus of the projection light 7 a projected by the imaging optical system 34. When the support leg 3 is inclined, for example, by an angle δ from the vertical direction, the optical axis 9 moves upward like the optical axis 9a, the center point O of the projection image moves to the center point Oa, and the center point Oa and the image projection unit The distance between the two increases. The focus adjustment mechanism 27 drives an actuator (not shown) incorporated in the imaging optical system 34 to correct the focus shift of the projection image 8a due to the change in distance under the control of the control unit 20. In this case, the control unit 20, the focus adjustment mechanism 27, or the imaging optical system 34 corresponds to the focus adjustment unit.

  With this configuration, the brightness or / and focus of the projection image 8a can be adjusted to correct the deformation of the projection image 8a, and the projection image 8a that can be easily seen by the observer can be projected.

<Fifth Embodiment>
A fifth embodiment of the present invention will be described with reference to FIG. In the fifth embodiment, the bottom plate 56 of the projector device 1 shown in FIGS. 2 and 3 is removed, and the fixing portion 11 is in contact with the wall 5 and fixed to the floor 6. Other configurations are the same as those of the projector apparatus 1 shown in FIGS. The same portions or portions having the same function are denoted by the same reference numerals.

  As shown in FIG. 5, the projector device 1 includes an image projection unit 2, a support leg 3 a that supports the image projection unit 2 on one end side, and a fixing unit 11 that is rotatably connected to the lower end of the support leg 3 a. It consists of and. The projector device 1 can be carried by removing the fixing portion 11 from the floor 6. The fixing portion 11 functions as a contact portion that contacts the wall 5. The rotating shaft 14 is installed in parallel to the surface of the wall 5. Accordingly, by rotating the support leg 3a around the rotation axis 14, the elevation angle of the projection light 7 changes, and the distance between the screen surface and the image projection unit 2 changes. That is, when the support leg 3 ′ a indicated by the broken line is tilted like the support leg 3 a, the image projection unit 2 ′ moves to the image projection unit 2 and the projection image is enlarged.

  In this case, as described above, the support leg 3a or the image projection unit 2 detects the tilt of the support leg 3a or the image projection unit 2 and the image projection unit 2 corrects the trapezoid of the projected image. Means, brightness correction means, or focus correction means can be provided to perform trapezoidal correction, brightness correction, or focus correction of the projected image 8. By providing such a correction means, the user can project an easy-to-see projection image 8 without being conscious of the inclination angle of the support leg 3 from the surface of the wall 5. Further, by installing a caster or the like below the bottom plate 56, the projector device 1 can be easily moved and stored.

<Sixth Embodiment>
A sixth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic side view showing a state in which the projector device 1 is installed on a part of the wall 5. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 6, the projector device 1 includes an image projection unit 2, a support leg 3 that supports the image projection unit 2, and a fixing unit 11 that rotatably connects the support leg 3. The image projection unit 2 is connected to one end of a support leg 3, and the other end of the support leg 3 is rotatably connected to a fixed unit 11 installed on the wall 5 via a rotation shaft 14 as a support unit. . When the projector apparatus 1 is not used, the image projection unit 2 ′ and the support leg 3 ′ are brought close to the wall 5 as indicated by a broken line. When using the projector device 1, as shown by a solid line, the support leg 3 is tilted so as to protrude from the wall 5 with the rotation shaft 14 as the rotation center. Then, the projection image is projected from the image projection unit 2 onto the screen 17 installed on the wall surface of the wall 5. By installing the projector device 1 on the wall 5 in this way, it can be used easily when necessary, and can be folded as shown by a broken line when not in use, so that the room can be used effectively. it can. Moreover, you may form separately the site | part of the wall 5 which should be projected as a screen, and the accommodating part for accommodating the projector apparatus 1. FIG. It is also possible to install a rail or the like between the fixing unit 11 and the wall 5, pull out the projector device 1 from the storage unit, move it using the rail as a guide just below the screen, and fix and project with a stopper or the like.

  As already described, the support leg 3 or the image projection unit 2 detects the tilt of the support leg 3 or the image projection unit 2, and the image projection unit 2 uses the trapezoidal correction unit for the projected image 8. In addition, a brightness correction unit or a focus correction unit can be provided to perform trapezoidal correction, luminance correction, or focus correction of the projected image 8. By providing such correction means, the user can project an easy-to-see projection image 8 without being conscious of the inclination angle φ from the surface of the wall 5 of the support leg 3. Moreover, it has the convenience that the projection image 8 can be enlarged / reduced according to the magnitude | size of inclination-angle (phi).

<Seventh Embodiment>
A seventh embodiment of the present invention will be described with reference to FIG. In the seventh embodiment, the position of the shaft 4 and the installation position of the image projection unit 2 of the projector device 1 of the first embodiment shown in FIG. 1 are changed. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 7, the projector device 1 includes an image projection unit 2, a support leg 3 a that supports the image projection unit 2, and a support leg 3 b that is pivotally connected to the support leg 3 a by a shaft 4. . The image projection unit 2 is installed at one end of the support leg 3a, and a caster 55a is installed at the other end 57. A caster 55b is installed at the end of the support leg 3b opposite to the shaft 4. Each caster is provided with a lock mechanism (not shown) for fixing the rotation of the wheel. The other end 57 of the support leg 3a abuts against the wall 5 via a caster 55a. Therefore, the other end 57 of the support leg 3a is configured as a fulcrum portion. Projection light 7 is projected from the image projection unit 2, and a projection image is projected onto the wall 5 as a screen. By moving the support leg 3b back and forth with respect to the wall 5 around the other end 57 of the support leg 3a, the image projection unit 2 ′, the support leg 3′a and the support leg 3′b are moved with respect to the wall 5. To move back and forth. Thereby, the size of the projected image can be adjusted. By installing the casters 55a and 55b on the floor side of the support legs 3a and 3b, the projector device 1 can be easily moved, and the projection direction can be easily adjusted and fixed by locking the wheels as necessary. Can do. Further, a bottom plate may be attached to the other end 57 of the support leg 3 a so that the end of the bottom plate contacts the wall 5. As described above, the projector device 1 according to the present embodiment is very easy to carry and install by folding the support leg 3a and the support leg 3b, and easily in an environment where there is no desk or table for installing the projector. It is possible to project.

  As already described, the support leg 3 or the image projection unit 2 detects the tilt of the support leg 3 or the image projection unit 2, and the image projection unit 2 uses the trapezoidal correction unit for the projected image 8. As described above, the luminance correction unit or the focus correction unit can be provided to perform the trapezoidal correction, the luminance correction, or the focus correction of the projected image. In the seventh embodiment, by adding the support leg 3b, the positions of the support leg 3a and the image projection unit 2 can be further stabilized.

<Eighth Embodiment>
The eighth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic side view of a projector apparatus in which the image projection unit 2 is installed on a leg portion of a small desk. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 8, the projector apparatus 1 includes two support legs 4a and 4b, a connecting portion 19 that connects the two support legs 4a and 4b to each other at the center thereof, and upper ends of the two support legs 4a and 4b. The installed top plate 18 and the image projection unit 2 connected to the upper side of the support leg 4a are provided. A fixed portion 11 that is in contact with the wall 5 and fixed to the floor 6 is installed at the lower end of the support leg 3a. The support leg 3a is connected to the fixed portion 11 by a rotary shaft 14 so as to be rotatable. The top plate 18 and the upper end portions of the two support legs 3a and 3b are connected so as to be rotatable. Accordingly, when the support leg 3a is tilted from the support leg 3'a indicated by the broken line around the rotation shaft 14, the top board 18 'moves to the top board 18 with its surface held horizontally, and from the wall 5 Leave. Accordingly, the image projection unit 2 also moves away from the wall 5 and changes from the projection light 7 ′ to the projection light 7.

  With this configuration, the user can place a document, a computer device, or the like on the top board 18 while using the projector device 1. The other configuration is the same as that of the seventh embodiment, and a description thereof will be omitted.

<Ninth Embodiment>
A projector device 1 according to a ninth embodiment of the present invention will be described with reference to FIG. In the ninth embodiment, the support leg 3 is provided with two fulcrum portions 14a and 14b, and is a projector device 1 in which the elevation angle of projected light does not change even when the support leg is tilted. FIG. 9 is a schematic side view of the projector apparatus 1 that projects a projection image onto a wall as a screen. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 9, the projector device 1 fixes a support leg 3, an image projection unit 2 that is rotatably connected to one end of the support leg 3 via a rotation shaft 14 a, and rotation of the image projection unit 2 with respect to the support leg 3. And a fixing screw 40. The fixing screw 40 is fixed to the side surface of the image projection unit 2 through a through hole 41 formed in the support leg 3. The other end of the support leg 3 is rotatably connected to a fixed portion 11 that is in contact with the wall 5 and fixed to the floor 6 via a rotary shaft 14b. That is, the rotating shaft 14b constitutes a first fulcrum portion, and the rotating shaft 14a constitutes a second fulcrum portion. The support leg 3 ′ is tilted at an angle θ from the wall 5 as indicated by a broken line and rotated to the support leg 3 indicated by a solid line. Then, the image projection unit 2 rotates around the rotation axis 14a by its own weight, and projects the projection light 7 in the same direction as the projection light 7 'direction projected by the image projection unit 2'. In other words, an angle between the horizontal axis x of the image projection unit 2 and the center line y of the support leg 3 is set as an inclination angle γ, and the relationship of θ + γ = 90 ° is maintained. In addition, after inclining the support leg 3, the image projection part 2 and the support leg 3 are fixed with the fixing screw 40 as needed. As a result, the image projection unit 2 can prevent the projection light 7 from vibrating due to vibration of the floor 6 or the like.

  In this way, the trapezoidal distortion due to the inclination of the support leg 3 does not occur in the projected image, and the upper end portion of the projected image image is prevented from coming off the wall 5 as the screen in most cases. be able to. However, since the image projection unit 2 is moved away from the wall 5 as a screen by inclining the support leg 3, the projected image is enlarged. In this case, as described above, the support leg 3 or the image projection unit 2 is provided with the tilt detection unit 33 for detecting the tilt of the support leg 3 or the image projection unit 2, and the luminance correction unit or the focus correction unit. The brightness correction or focus correction of the projected image can be performed. In addition, when the projected image is enlarged and deviates from the screen, correction for reducing the projected image may be performed. Moreover, the fixing | fixed part 11 can be fixed to a baseplate etc., and the whole baseplate can be made portable. Further, a movable part such as a caster can be installed between the bottom plate and the floor 6 so that the projector device 1 can be easily moved.

<Tenth Embodiment>
A tenth embodiment of the present invention will be described with reference to FIG. In the tenth embodiment, even when the elevation angle of the projection light projected from the projector device 1 changes, the lower part of the projection image is fixed. FIG. 10A is a schematic side view showing a state in which a projection image is projected by the projector device 1, and FIGS. 10B and 10C are broken line portions B in FIG. An embodiment of the interlocking mechanism portion indicated by is represented. The same portions or portions having the same function are denoted by the same reference numerals.

  In FIG. 10A, the projector device 1 is composed of two support legs 3a and 3b and an image projection unit 2 that is rotatably connected to one end of the support leg 3a via a rotation shaft 14a. . The two support legs 3a and 3b are rotatably connected by a rotating shaft 14c. The other end of the support leg 3a is rotatably connected to a fixed portion 11 that is in contact with the wall 5 and fixed to the floor 6 via a rotary shaft 14b. A caster 55 is installed at the other end of the support leg 3b. ing. That is, the rotation shaft 14b corresponds to the second support portion, and the rotation shaft 14a corresponds to the first support portion. The rotating shaft 14a and the rotating shaft 14c installed on the upper part of the support leg 3a constitute an interlocking mechanism for rotating in conjunction with each other. That is, when the support leg 3b opens in the direction of the arrow, the image projection unit 2 is rotated counterclockwise with respect to the support leg 3a. Thereby, the projection light 7′a and 7′b projected from the positions of the image projection unit 2 ′ and the support legs 3′a and 3′b indicated by the broken line, and the image projection unit 2 and the support leg 3a indicated by the solid line Among the projection lights 7a and 7b projected from the position 3b, the lower part 42 of the projection image projected by the projection light 7b and the projection light 7′b substantially coincides with the wall 5 as a screen. As a result, when the support leg 3b is tilted, the projected image is enlarged or reduced upward with the lower part 42 as a base point. By tilting the support leg 3a, it is possible to prevent the projected image from moving upward and becoming difficult to see the image.

  Here, the rotation of the rotating shaft 14b and the rotation of the rotating shaft 14c have a certain relationship. That is, when the support leg 3a rotates 90 degrees around the rotation shaft 14b, the support leg 3a and the support leg 3b open 180 degrees. Accordingly, the rotation of the rotation shaft 14b is halved with respect to the rotation of the rotation shaft 14c. Then, when the rotating shaft 14a and the rotating shaft 14c rotate in conjunction with each other with a predetermined relationship, the rotating shaft 14a as the first fulcrum portion and the rotating shaft 14b as the second fulcrum portion also interlock with each other in a predetermined relationship. Means that.

  FIG. 10B is a schematic side view illustrating an example of the interlocking mechanism portion of the broken line portion B in FIG. The support legs 3a and 3b are connected by a rotating shaft 14c. The rotating shaft 14c is fixed to the support leg 3b. Further, the rotation shaft 14 a is fixed to the image projection unit 2. The rotating shaft 14a and the rotating shaft 14c are connected by transmission members 46, 47, and 48. The transmission members 46, 47 and 48 are connected to each other by shafts 49 and 50 so as to be rotatable. The transmission member 46 is fixed to the rotating shaft 14c by the connecting portion 45b, and the transmitting member 48 is fixed to the rotating shaft 14a by the connecting portion 45a. As a result, when the support leg 3b moves in the direction of the arrow, the rotating shaft 14c rotates counterclockwise, and a force acts on the transmission member 47 below the arrow by the transmission member 46. Then, the transmission member 48, and thus the image projection unit 2, is rotated counterclockwise. Thus, when the support leg 3b moves away from the wall 5 as the screen, the rotation shaft 14a is rotated counterclockwise, and the elevation angle in the projection direction projected by the image projection unit 2 is reduced. . That is, the rotation direction of the rotation of the support leg 3a around the rotation shaft 14b is opposite to the rotation of the image projection unit 2 relative to the support leg 3a around the rotation shaft 14a. By appropriately setting the lengths of the transmission members 46 and 48, the lower end portion of the projection image can be substantially fixed to the lower portion 42.

  FIG. 10C is a schematic side view illustrating another example of the interlocking mechanism unit. In this example, the pulley 52b is connected to the rotating shaft 14c connected to the support leg 3b, the pulley 52a is connected to the rotating shaft 14a connected to the image projection unit 2, and the transmission belt 51 is installed between the two pulleys. Has been. Accordingly, when the support leg 3b moves away from the wall 5, the rotation shaft 14c rotates counterclockwise, and the transmission belt 51 also rotates the rotation shaft 14a counterclockwise. Also in this case, the rotation direction of the support leg 3a is opposite to the rotation of the image projection unit 2 with respect to the support leg 3a. By appropriately setting the diameters of the two pulleys, the lower end portion of the projection image can be substantially fixed to the lower portion 42.

  In addition to the above example, the interlocking mechanism unit may be configured by combining a rotation transmission gear, or an ohm gear or the like may be used to transmit the rotation of the rotation shaft 14c to the rotation shaft 14a. . Further, the inclination detecting means 33 for detecting the inclination of the supporting leg 3a or the image projecting section 2 in the supporting leg 3a or the image projecting section 2, and the trapezoid correcting means, the brightness correcting means or the focus of the projected image 8 in the image projecting section 2. As described above, the correction means can be provided to perform trapezoidal correction, luminance correction, or focus correction of the projected image 8. Further, the fixing portion 11 may be fixed to the bottom plate or the like without being directly fixed to the floor 6, and the end portion of the bottom plate may be brought into contact with the wall 5. Also in this case, since the projector device can be carried along with the bottom plate, the convenience is high.

1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a perspective view of a projector with support legs according to an embodiment of the present invention. 1 is a perspective view of a projector with support legs according to an embodiment of the present invention. It is a functional block diagram of the projector with a supporting leg which concerns on embodiment of this invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. 1 is a schematic side view of a projector with support legs according to an embodiment of the present invention. It is a figure showing a conventionally well-known projector usage aspect.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector 2 with a support leg Image projection part 3 Support leg 4 Axis 5 Wall 6 Floor 7 Projection light 8 Projection image 9 Optical axis 10 Support plate 11 Fixing part 12 Inclination calibration hole 13 Stopper 14 Rotation axis

Claims (15)

An image projection unit and a support leg that supports the image projection unit; and a projector with a support leg that projects the image from the image projection unit toward the screen by standing the support leg,
The support leg supports the image projection unit in the vicinity of one end thereof, includes a fulcrum part in the vicinity of the other end, and rotates the support leg around the fulcrum part, thereby at least the image projection unit and the Projector with support legs that can change the distance to the screen.   2. The support leg according to claim 1, wherein the support leg includes at least two support legs, and the two support legs are rotatably connected to each other between the image projection unit and the fulcrum unit. Projector with support legs.   The image projection unit is connected to one end side of the support leg, and a contact portion that can contact a plane including the screen is provided on the other end side of the support leg. The projector with a support leg according to claim 1 or 2. The support leg is rotatably connected to a fixed part positioned with respect to the screen at the fulcrum part,
4. The support leg according to claim 1, wherein the distance between the image projection unit and the screen changes as the support leg rotates about the fulcrum part. 5. With projector.   The said fixing | fixed part and the said support leg are pivotally supported by the axis | shaft substantially parallel with respect to the plane containing the said screen so that rotation is possible, The support leg of Claim 3 or Claim 4 characterized by the above-mentioned. projector.   The projector with supporting legs according to claim 4, wherein the fixing portion is installed on a floor surface.   The projector with supporting legs according to claim 4, wherein the fixing portion is installed on a part of a wall constituting the screen.   The image projection unit is connected to one end side of the support leg, and a movable unit movable to a standing surface on which the support leg stands is provided on the other end side of the support leg. The projector with supporting legs according to claim 1 or 2.   The projector with a support leg according to claim 1, wherein the image projection unit is rotatably connected to the support leg.   The support leg has a first fulcrum part located on one end side and a second fulcrum part located on the other end side, and is pivotally connected to the image projection part at the first fulcrum part. The projector with supporting legs according to claim 9, wherein the second fulcrum part is rotatably connected to a fixed part positioned with respect to the screen.   The rotation of the support leg with respect to the fixed part at the second fulcrum part and the rotation of the image projection part with respect to the support leg at the first fulcrum part rotate in opposite directions while maintaining a predetermined relationship with each other. The projector with a support leg according to claim 10, further comprising an interlocking mechanism that moves.   The position of the lower end portion of the projection image on the screen is substantially constant before and after an angle change caused by rotation between the fixed portion and the support leg at the second fulcrum portion. Or the projector with a support leg of Claim 11.   The image projection unit includes a detection unit that detects the inclination of the support leg to be erected or the inclination of the image projection unit, and a correction unit that corrects a deformation of the projection image caused by the inclination, and the detection unit. The projector with supporting legs according to any one of claims 1 to 10, wherein a projection direction is changed or a projection image is corrected by the correction unit based on inclination information from the projector.   The projector with supporting legs according to claim 13, wherein the detecting means is an angle sensor for detecting the inclination of the image projection unit.   The projector with supporting legs according to claim 13, wherein the detecting means is a rotary encoder that detects an inclination of the supporting legs with respect to the fulcrum portion.

Images