JP2007304261A - Device for adjusting display position of projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a multi-vision device that uses one or more projectors and screens, which has high visibility by solving the problem wherein visibility is spoiled due to the reflection of an optical sensor in the screen, in a constitution where the optical sensor is installed on a diagonal on the end face of the screen, in order to adjust a display screen by a projector optimally to each screen, if a gap hardly exists between the screens adjacent in up-and-down and right-and-left directions in automatic adjustment for the display screen in the multi-vision device, and the optical sensor cannot be installed and the display screen is not accurately adjusted automatically. <P>SOLUTION: The optical sensors 107, 108, 109 and 110 are provided in the vertical and horizontal directions of a light-shielding plate 106 installed on a boundary of video light 103 from the projector 101, and detection signals 111 from the respective optical sensors are received by a controller 112. A lens-driving control signal 113 is transmitted to the projector 101 to drive the lens 102. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projector display position adjusting device that automatically adjusts the position and size of a display screen using a projector.

  In recent years, in the field of large-sized video display systems, there are multi-vision devices that use multiple projectors to connect multiple screens on which display screens are projected from each projector in order to display multiple videos. It is widely used for disaster prevention monitoring, various events and exhibitions. In such a multi-vision device, the display screens projected from the individual projectors need to be connected and displayed in consideration of the connection of the screens. In order to connect and display the display screens, the display of each projector It is necessary to adjust the display area according to the screen area so that the area and each screen size exactly match. In recent years, the adjustment of the display screen of the projector is being automated, and a technique for automatically adjusting the display size and position of the projector display screen using an optical sensor is known.

  A technique for automatically adjusting the position of the display screen of a conventional projector will be described below.

  Conventionally, as a technique for automatically adjusting the position of a display screen of a projector, for example, one described in Patent Document 1 is known. A technique for automatically adjusting the position of the display screen of the projector will be described with reference to FIGS. FIG. 7 is a side view showing the positional relationship of components for explaining a technique for automatically adjusting the position of the display screen of a conventional projector, and FIG. 8 is a diagram showing the positional relationship between the front of the screen, the display screen, and each element. . In FIG. 7, reference numeral 701 denotes a screen on which a display screen is projected, reference numeral 702 denotes a projector that projects the display screen, and reference numeral 703 denotes a lens of the projector 702. Reference numeral 704 denotes image light projected from the projector 702, reference numerals 705 and 706 denote diagonal light sensors installed at the end of the screen 701, reference numerals 707 and 708 denote light detection signals detected by the optical sensors 705 and 706, and reference numeral 709 denotes a lens. A lens drive control signal 710 for driving the lens 703 is output by the drive control device. In FIG. 8, reference numeral 711 denotes a display screen before adjustment, and reference numeral 712 denotes a display screen after adjustment (position to be displayed).

  The operation of the technology for automatically adjusting the position of the display screen of the conventional projector configured as described above will be described below.

  First, it is assumed that the image light 704 output from the projector 702 forms an image on the screen 701 and is displayed at a position different from the display screen 712 where the display screen 711 is to be displayed when viewed from the front of the screen 701. At this time, if neither of the optical sensors 705 and 706 detects the image light 704, the optical detection signals 707 and 708 of the optical sensors are not transmitted, and the lens drive control device 709 displays the display screen 711 before adjustment. It is determined that the display screen is smaller than the display screen 712 at the position to be displayed, and a lens drive control signal 710 transmits a signal for zooming up the lens 703 to the projector 702 to increase the display screen size. At this time, both the optical sensors 705 and 706 are fixed when the image light 704 is detected.

  Conversely, when both of the optical sensors 705 and 706 detect the image light 704, the optical detection signals 707 and 708 of the optical sensors are transmitted, and the lens drive control device 709 displays the display screen 711 before adjustment. It is determined that the position is larger than the display screen 712 at the position to be displayed, and a lens drive control signal 710 transmits a signal for zooming down the lens 703 to the projector 702 to reduce the display screen size, and then temporarily detect the optical sensors 705 and 706. When both of them no longer detect the image light 704, a signal for zooming up the lens 703 is transmitted to the projector 702 by the lens drive control signal 710 in the same manner as described above, the display screen size is increased, and the optical sensor 705 and Both of them are fixed when the image light 704 is detected.

If only one of the optical sensors 705 and 706 detects the image light 704, it is determined that the position of the display screen 711 is shifted, and the lens 703 is shifted to adjust the optical axis, or the lens 703 A lens drive control signal 710 for zooming up or down is transmitted to the projector 702 to change the screen position and size, and the lens 703 is zoomed down as described above, and then the lens 703 is zoomed up. The display screen 711 is enlarged, and is fixed at the screen size at which the optical sensors 705 and 706 detect the video light 704 at the same time. Finally, an adjusted display screen 712 is obtained.
Japanese Patent Laying-Open No. 2003-9040

  However, in the case of using the entire area of one screen as a screen display area, or in a multi-vision device configured by a plurality of projectors and a plurality of screens and displaying a plurality of screens, the connection between the individual screens is ensured. Because there is almost no gap between adjacent screens, there is a problem that the light sensor for adjusting the display screen cannot be arranged at the edge of the screen. Even if it is installed, there is no light on the screen. There was a problem that the shadow of the sensor was made and the screen display was hindered.

  Furthermore, in the method of attaching two optical sensors on the diagonal line at the edge of the screen, if the display image is larger than the image size to be adjusted and the boundary line of the display screen is on the two optical sensors, the diagonal line on the screen Since the image light is detected simultaneously by the two installed optical sensors, it is determined that the display image is large and the lens is zoomed down. As a result, if both the optical sensors fail to detect simultaneously, the lens zoom There is also a problem in that an accurate display image cannot be obtained due to the repetition of the image up and subsequent steps.

  The present invention solves the above-mentioned conventional problems. In a multi-vision device that includes a plurality of projectors and a plurality of screens and displays a plurality of screens, when there is almost no gap between adjacent screens, or Even when the screen area is the same as the screen area and the display screen area is the same, and the optical sensor cannot be attached to the edge of the screen, the display screen is accurately adjusted automatically to obtain a highly visible multivision device. It is an object of the present invention to provide a projector display position adjustment device that can perform the above-described operation.

  According to a first aspect of the present invention, there is provided a projector unit that projects image light, a screen unit that forms an image of the projection light of the projector unit, and an image that is enlarged and displayed on the projector unit. A lens unit, a housing unit that supports the projector unit and the screen unit, a light shielding plate unit fixed to the housing unit, a plurality of optical sensor units installed on the light shielding plate unit, and the optical sensor A controller unit that detects a light detection signal of the unit and sends a lens control signal to the projector unit, and operates the lens driving unit of the projector unit according to the signal of the controller unit, thereby projecting it onto the screen unit. This is a projector display position adjustment device characterized by adjusting the size and position of the image to be displayed to an optimum position. An effect that can automatically adjust the display screen without creating shadows of the light sensor on top.

  The invention described in claim 2 is the projector display position adjustment device according to claim 1, wherein the light shielding plate portion is installed on the image optical path boundary of the projection light from the lens portion to the screen portion. The optical sensor has a function of enabling a configuration that does not require the optical sensor to be directly installed at the end of the screen.

  The invention according to claim 3 is the projector display position adjusting device according to claim 1, wherein the plurality of photosensor units are installed at least at four positions, top, bottom, left, and right. It has the effect | action which can adjust a display screen more correctly than.

  According to a fourth aspect of the present invention, the controller unit obtains a light detection signal from a plurality of optical sensor units and determines the position of the display screen, and the zoom of the lens based on information of the screen position determination unit. Create a lens drive control signal for up, zoom down, or lens shift, and send the adjustment signal from the projector lens drive control unit to send to the projector unit and the adjustment signal from the remote control or switch when adjusting the display screen 2. An adjustment operation determination unit that receives a signal from the adjustment signal reception unit, permits lens drive control to the projector lens drive control unit, and starts an automatic adjustment operation. This is a projector display position adjustment device that optimizes the size and position of the image projected on the screen. It has the effect of adjusting the position.

  According to a fifth aspect of the present invention, the housing portion has a connection recess on the upper surface and a connection protrusion on the lower surface, and is fitted to the connection protrusion and the connection recess of the other housing. The projector display position adjusting device according to claim 1, wherein the multi-vision device is configured by using this device, so that there is almost no gap between adjacent screens, and the display screen of each screen is displayed. It has the effect of being automatically adjustable.

  The projector according to claim 6 is characterized in that the casing portion has at least one fixing hole, and the fixing hole of another casing can be connected by the casing connecting plate. This is a display position adjustment device. By constructing a multivision device using this device, there is almost no gap between adjacent screens, and the display screen of each screen can be automatically adjusted. .

  As described above, the present invention has a configuration in which the optical sensor unit is not installed on the screen. Therefore, when a plurality of screens are adjacent vertically and horizontally and the optical sensor cannot be installed on the screen, as in a multivision device, or In addition to the excellent effect that automatic adjustment is possible without disturbing the visibility of the display screen area even when it is used on one surface, the position of the display screen can be more accurately determined by providing four optical sensors. An effect of enabling automatic adjustment is also obtained.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a configuration diagram of a projector display position adjusting apparatus according to Embodiment 1 of the present invention.

  In FIG. 1, reference numeral 101 denotes a projector for projecting image light, which outputs a personal computer, a video image, or a test pattern signal built in the projector main body as image light. Reference numeral 102 denotes a lens attached to the projector 101 for enlarging and displaying video light, 103 denotes video light projected from the projector 101, 104 denotes a screen for forming an image projected from the projector 101, and 105 denotes the projector 101 and the screen. A housing that supports 104. Reference numeral 106 denotes a light shielding plate, which is fixed to the housing 105 on the back side of the screen 104 and is installed on the image optical path boundary from the lens 102 to the screen 104, and the quadrangular pyramid is parallel to the screen 104. A trapezoidal four-sided plate formed when cut off is formed into a cylindrical shape, and one end of the light shielding plate 106 is in close contact with the top, bottom, left and right sides of the screen 104. Reference numerals 107, 108, 109, and 110 are optical sensors installed on the light shielding plate 106 so as to detect the image light 103 in the direction of the projection light source of the projector at the vertical and horizontal positions as viewed from the front of the screen. is there. Reference numeral 111 denotes light detection signals from the optical sensors 107, 108, 109, and 110. Reference numeral 112 denotes a controller that detects the light detection signal 111 and transmits a lens drive control signal 113 to the projector 101.

  FIG. 2 is a front view of the screen, a display screen, and a positional relationship diagram of each element in the first embodiment of the present invention.

  In FIG. 2, reference numeral 114 denotes a display screen before the position and size adjustment at the screen position as viewed from the front.

  FIG. 3 is an internal configuration diagram of the controller 112 in the first embodiment of the present invention.

  In FIG. 3, 111a is a screen upper end light detection signal, 111b is a screen lower end light detection signal, 111c is a screen left end light detection signal, and 111d is a screen right end light detection signal. 121 is a screen position determination unit that obtains the light detection signal 111 and determines the position of the display screen 114, and 122 is a projector lens drive control unit. Depending on the information of the screen position determination unit 121, the lens 102 is zoomed up or down, Alternatively, a lens drive control signal 113 for performing lens shift is created and transmitted to the projector 101 as the lens drive control signal 113. An adjustment signal receiving unit 123 receives the adjustment signal 124 from a remote controller or a switch when the display screen 114 is adjusted. The adjustment operation determination unit 125 receives a signal from the adjustment signal reception unit 123, permits the projector lens drive control unit 122 to perform lens drive control, and starts an automatic adjustment operation. An adjustment operation completion signal 126 is transmitted from the screen position determination unit 121.

  FIG. 4 is a diagram showing the presence / absence of image light detection of the optical sensor, the screen position determination state, and the adjustment operation of the lens driving unit in Embodiment 1 of the present invention.

  The operation of the projector display position adjusting apparatus according to the first embodiment configured as described above will be described with reference to FIGS.

  First, the image light 103 enlarged and projected by the lens 102 from the projector 101 forms an image on the screen 104 and is displayed as a display screen 114 before adjustment viewed from the front. In this state, when the adjustment signal receiving unit 123 receives the adjustment signal 124 from the remote controller or the switch, the adjustment operation determining unit 125 permits the lens drive control to the projector lens drive control unit 122, and the automatic adjustment operation is started. The At this time, if the screen area is not accurately displayed in the position and size of the screen 104, the optical sensors 107, 108, 109, 110 installed on the upper, lower, left, and right sides of the light shielding plate 106 leak beyond the light shielding plate 106. The incoming image light, that is, the image light 103 deviated from the area of the screen 104 is detected as a light detection signal 111 and input to the controller 112. The controller 112 uses the screen position determination unit 121 to determine whether there is a screen upper end light detection signal 111a, a screen lower end light detection signal 111b, a screen left end light detection signal 111c, and a screen right end light detection signal 111d. The position of the display screen 114 is determined. Based on the determination result, the lens 102 is shifted, zoomed up, or zoomed down so that the display screen 114 before adjustment is adjusted to an area equivalent to the screen 104.

  A more specific adjustment method will be described below.

  If the upper light sensor 107, the lower light sensor 108, the left light sensor 109, and the right light sensor 110 do not detect the image light 103 when the pre-adjustment display screen 114 is displayed, the screen position determination unit 121 Then, it is determined that the display screen 114 before adjustment is small, and a lens zoom-up control signal is created from the projector lens drive control unit 122 and sent to the projector 101 as the lens drive control signal 113. Conversely, when the pre-adjustment display screen 114 is displayed, if the upper light sensor 107, the lower light sensor 108, the left light sensor 109, and the right light sensor 110 all detect the image light 103, the screen The position determination unit 121 determines that the display screen 114 before adjustment is large, creates a lens zoom down control signal from the projector lens drive control unit 122, and sends it to the projector 101 as the lens drive control signal 113. Furthermore, the screen position is determined as shown in FIG. 4 according to the detection state of the image light in each optical sensor, and the projector lens drive control unit 122 is operated, so that the upper optical sensor 107 and the lower optical sensor 108 are finally obtained. When the left light sensor 109 and the right light sensor 110 simultaneously detect four image lights, the display screen 114 before adjustment becomes an area equivalent to the screen 104, and the adjustment is completed. At this time, the screen position determination unit 121 sends an adjustment operation completion signal 126 to the adjustment operation determination unit 125. The adjustment operation determination unit 125 disallows the lens drive control of the projector lens drive control unit 122 and completes the automatic adjustment operation. To do.

  As described above, according to the present embodiment, the light shielding plate 106 is installed on the casing 105 that supports the projector 101 and the screen 104 along the boundary line of the image light 103 of the projector 101, and the light shielding plate 106 Optical sensors 107, 108, 109, and 110 are provided on the opposite side of the screen 104 side in the direction of the image light 103 of the projector in four directions, up, down, left and right, and the detection signals 111 of the respective optical sensors are received by the controller 112 By transmitting the lens drive control signal 113 to the projector 101 and driving the lens 102, it becomes possible to adjust the display screen area according to the screen area without installing each optical sensor at the end of the screen. A highly visible screen area can be obtained.

(Embodiment 2)
FIG. 5 is a side view of a configuration when two projector display position adjusting devices according to the second embodiment of the present invention are used in the vertical direction to form a multivision device.

  In FIG. 5, 201 is a housing viewed from the side. Reference numeral 202 denotes a screen, 203 denotes a housing upper connecting concave portion, and 204 denotes a housing lower connecting convex portion. The inside of the housing 201 is the same as the configuration of FIG.

  FIG. 6 is a rear view of the configuration when two projector display position adjusting devices are used in the horizontal direction to form a multi-vision device.

  In FIG. 6, reference numeral 205 denotes a fixing hole provided in the casing 201, which is used when a plurality of casings 201 are connected in the horizontal direction and fixed by the casing connecting plate 206.

  1 is different from the configuration of FIG. 1 in that a plurality of casings 201 are connected in the vertical direction, and a casing upper connecting recess 203 for installing adjacent screens 202 without gaps, a casing lower connecting projection 204, A plurality of cases 201 are connected in the horizontal direction by means of a case connecting plate 206, and fixing holes 205 are arranged in the case to install adjacent screens 202 without any gaps.

  The operation of the multi-vision apparatus constituted by a plurality of projector display position adjusting apparatuses in the vertical and horizontal directions as described above will be described below.

  First, a case where the projector display position adjusting device is connected in the vertical direction will be described. The housing 201 has a housing lower connecting convex portion 204 on the lower surface, and fits into the housing upper connecting concave portion 203 of another housing. When stacking a plurality of casings 201 in the vertical direction, the casing upper connecting concave portion 203 and the casing lower connecting convex portion 204 are stacked so as to match each other.

  Next, a case where the projector display position adjusting device is connected in the horizontal direction will be described. The housing 201 viewed from the rear side has a fixing hole 205 for connecting in a lateral manner, and is fixed by a fixing hole 205 of another housing 201 and a housing connecting plate 206. When connecting a plurality of casings 201 in the horizontal direction, adjacent fixing holes 205 are connected by a casing connecting plate 206.

  When configured using a plurality of projector display position adjusting devices in the vertical direction and the horizontal direction as described above, the screens 202 are installed in each housing, the adjacent screens 202 are installed without gaps, and the multivision device is installed. It can be realized.

  Since the multi-vision device of this configuration has a projector display position adjustment function for each case, a multi-vision device that can automatically adjust the screen area can be configured by adjusting the display screen area according to the screen area for each case. .

  The projector display position adjusting apparatus according to the present invention has a function of automatically adjusting a display screen area without providing a light sensor at the screen end, and a function of connecting the casing in the vertical direction or the horizontal direction. Therefore, there is almost no gap between adjacent screens, and it is useful in fields such as a large video display system such as a multi-vision device in which an optical sensor for adjusting the display screen cannot be attached to the end of the screen. .

Configuration diagram of projector display position adjustment apparatus according to Embodiment 1 of the present invention The front view of the screen of the projector display position adjustment apparatus in Embodiment 1 of this invention, a display screen, and the positional relationship figure of each element FIG. 3 is an internal configuration diagram of a controller of the projector display position adjustment device according to the first embodiment of the present invention. Presence / absence of image light detection of the optical sensor of the projector display position adjustment device according to Embodiment 1 of the present invention, a screen position determination state, and an adjustment operation diagram of the lens driving unit Side view of a configuration when two projector display position adjusting devices in Embodiment 2 of the present invention are used in the vertical direction to form a multi-vision device. Rear view of configuration when two projector display position adjusting devices in embodiment 2 of the present invention are used in the horizontal direction to form a multi-vision device. Side view showing the positional relationship of components of a conventional projector Positional diagram of the front of the screen of a conventional projector, the display screen, and each element

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Projector 102 Lens 103 Image light 104 Screen 105 Case 106 Light-shielding plate 107 Upper light sensor 108 Lower light sensor 109 Left light sensor 110 Right light sensor 111 Light detection signal 111a Screen upper edge light detection signal 111b Screen lower edge light detection signal 111c Screen left edge light detection signal 111d Screen right edge light detection signal 112 Controller 113 Lens drive control signal 114 Display screen 121 Screen position determination unit 122 Projector lens drive control unit 123 Adjustment signal reception unit 124 Adjustment signal 125 Adjustment operation determination unit 126 Adjustment operation completion signal 201 Case 202 Screen 203 Case upper connection concave portion 204 Case lower connection convex portion 205 Fixing hole 206 Case connection plate

Claims (6)

A projector unit that projects image light; a screen unit that forms an image of projection light of the projector unit; a lens unit that is provided in the projector unit and that displays an enlarged image on the screen unit; and the projector unit and the screen unit A supporting housing, a light shielding plate fixed to the housing, a plurality of light sensor units installed on the light shielding plate, and a light detection signal of the light sensor unit to detect the projector unit And a controller unit for transmitting a lens control signal, and operating the lens driving unit of the projector unit in accordance with a signal of the controller unit, so that the size and position of the image projected on the screen unit are set to an optimal position. A projector display position adjusting device characterized by adjusting. 2. The projector display position adjusting device according to claim 1, wherein the light shielding plate portion is installed on a video light path boundary of the projection light from the lens portion to the screen portion. The projector display position adjusting device according to claim 1, wherein the plurality of optical sensor units are installed at least at four locations, top, bottom, left, and right. The controller unit obtains light detection signals from a plurality of optical sensor units and determines the position of the display screen, and performs zoom-up or zoom-down or lens shift of the lens according to information of the screen position determination unit. A lens driving control signal to be generated and transmitted to the projector unit, an adjustment signal receiving unit for receiving an adjustment signal from a remote control or a switch when adjusting the display screen, and the adjustment signal receiving unit 2. The projector display position adjusting device according to claim 1, further comprising: an adjustment operation determining unit that receives a signal, permits lens drive control to the projector lens drive control unit, and starts an automatic adjustment operation. The projector according to claim 1, wherein the housing part has a connecting concave part on the upper surface and a connecting convex part on the lower surface, and is fitted to the connecting convex part and the connecting concave part of another housing. Display position adjustment device. The projector display position adjusting device according to claim 1, wherein the housing unit has at least one fixing hole, and can be connected to a fixing hole of another housing by a housing connecting plate.

Images