JP6562653B2 - Projection device - Google Patents

Description

  The present invention relates to a projection apparatus that projects an image on a screen.

  In recent years, a three-plate projector having three liquid crystal panels corresponding to red (R), green (G), and blue (B), which are the three primary colors of light, is known. Such a projection apparatus separates light output from the light source into red light, green light, and blue light, modulates the light of each color into each liquid crystal panel, and outputs the light output from the three liquid crystal panels. The image was displayed on the screen by combining.

  In such a projection apparatus, relative displacement may occur between the liquid crystal panels due to variations in the installation positions of the liquid crystal panels. In this case, color misregistration occurs in the image displayed on the screen due to the positional deviation, and it is impossible to provide a high-quality image projection to the user.

  Currently, when a user adjusts the position of an image displayed by a liquid crystal panel corresponding to red, a projection apparatus that displays an image indicating an amount of deviation from the position of an image displayed by a liquid crystal panel corresponding to another color is provided. (Patent Document 1).

JP2013-105170A

  Conventionally, the position of an image displayed by a liquid crystal panel other than the liquid crystal panel selected for color misregistration adjustment is not displayed to the user. Therefore, even though the user can know the position of the image displayed by the selected liquid crystal panel, the user cannot know the position of the image displayed by another liquid crystal panel. This makes it difficult for the user to match the position of the image displayed by the selected liquid crystal panel with the position of the image displayed by another liquid crystal panel.

  SUMMARY An advantage of some aspects of the invention is that it enables a user to easily adjust a color shift.

The projection apparatus according to the present invention includes a plurality of display means capable of changing an image display area for displaying a display image in each displayable area, and optically combining light from the plurality of display means by a combining unit. Projecting means for projecting the optical image generated by the control, control means for moving the image display area of each of the plurality of display means within the displayable area, and between the display images of the plurality of display means in the adjustment mode for adjusting a deviation, to each of the plurality of display means, the position adjustment marker indicating the movable range in the displayable area of the image display area, the current indicating the current position of the image display area position marker, an image processing means for displaying, selecting one of said plurality of display means, operating means for instructing the movement of the image display area of the selected display unit It has, said control means, in accordance with an instruction of the operating means, characterized by moving the image display area of the selected display unit.

  According to the present invention, the user can easily adjust the color misregistration.

FIG. 3 is a block diagram showing an example of a projector 100 in Embodiments 1 and 2. 3 is a block diagram illustrating an example of an image processing unit 140. FIG. It is a flowchart which shows an example of an adjustment process. It is explanatory drawing which shows an example of a registration adjustment process. 6 is an explanatory diagram illustrating an example of display processing according to Embodiment 1. FIG. 10 is an explanatory diagram of an example of a display process in Embodiment 2. FIG.

  Hereinafter, examples of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments.

  In the first embodiment, a projector 100 using a liquid crystal panel will be described as an example of the projection apparatus 100. The projection device 100 may be a display device such as a display. FIG. 1 is a block diagram illustrating an example of the configuration of the projector 100.

  The projector 100 includes a CPU 110, a ROM 111, a RAM 112, an operation unit 113, an image input unit 130, and an image processing unit 140. Further, the projector 100 includes a liquid crystal control unit 150, liquid crystal elements 151R, 151G, and 151B, a light source control unit 160, a light source 161, a color separation unit 162, a color composition unit 163, an optical system control unit 170, and a projection optical system 171. Further, the projector 100 includes a recording / playback unit 191, a recording medium 192, a communication unit 193, an imaging unit 194, a display control unit 195, and a display unit 196.

  CPU 110 controls each unit of projector 100. The ROM 111 stores a control program executed by the CPU 110. The RAM 112 temporarily stores a control program and data as a work memory of the CPU 110. Further, the CPU 110 temporarily stores still image data and moving image data reproduced from the recording medium 192 by the recording / reproducing unit 191 in the RAM 112, and reproduces each image and video using the program stored in the ROM 111. it can. The CPU 110 can temporarily store still image data and moving image data received from the communication unit 193 in the RAM 112, and can reproduce each image and video using a program stored in the ROM 111. In addition, the CPU 110 temporarily stores an image or video obtained by the imaging unit 194 in the RAM 112, converts it into still image data or moving image data using a program stored in the ROM 111, and records the image or video on the recording medium 192. You can also.

  The operation unit 113 receives a user instruction and transmits an instruction signal corresponding to the operation to the operation unit 113 to the CPU 110. The operation unit 113 includes, for example, a switch, a dial, and a touch panel provided on the display unit 196. The operation unit 113 includes a signal receiving unit (such as an infrared receiving unit) that receives a radio signal from the remote controller and transmits a predetermined instruction signal to the CPU 110 based on the received signal. CPU 110 controls each unit of projector 100 in accordance with control signals input from operation unit 113 and communication unit 193.

  The image input unit 130 is a means for inputting a video signal from an external device, for example, a composite terminal, an S video terminal, a D terminal, a component terminal, an analog RGB terminal, a DVI-I terminal, a DVI-D terminal, or HDMI (registered) Trademark) terminal. The image input unit 130 has conversion means for converting an analog video signal into a digital video signal. The image input unit 130 transmits the input video signal to the image processing unit 140. The image input unit 130 may receive a video signal from an external device via a communication cable, or may receive a video signal from the external device by wireless communication. The external device may be a personal computer, a camera, a mobile phone, a smartphone, a hard disk recorder, a game machine, or the like as long as it can output a video signal.

  The image processing unit 140 performs a changing process such as the number of frames, the number of pixels, and the image shape on the video signal input by the image input unit 130 and supplies the changed signal to the liquid crystal control unit 150. The image processing unit 140 can execute processing such as frame thinning processing, frame interpolation processing, resolution conversion processing, and distortion correction processing (keystone correction processing). In addition to the video signal received from the image input unit 130, the image processing unit 140 can also perform the above-described change processing on the image and video reproduced by the CPU 110.

  The liquid crystal control unit 150 controls the transmissivity in units of pixels of the liquid crystal elements (display means) 151R, 151G, and 151B in accordance with one frame of video signal supplied from the image processing unit 140. The liquid crystal control unit 150 drives the liquid crystal element 151R according to the R (red) signal of the video signal processed by the image processing unit 140, drives the liquid crystal element 151G according to the G (green) signal, and B (blue). ) The liquid crystal element 151B is driven in accordance with the signal. The color separation unit 162 separates white illumination light from the light source 161 into red light, green light, and blue light, and supplies the separated illumination light to the liquid crystal elements 151R, 151G, and 151B. Thereby, the liquid crystal element 151R displays a red image of the RGB image to be displayed, the liquid crystal element 151G displays a green image of the RGB image to be displayed, and the liquid crystal element 151B is an RGB image to be displayed. The blue image of is displayed. The liquid crystal elements 151R, 151G, and 151B are light modulation units that generate optical images of the respective colors by spatially modulating the illumination light separated by the color separation unit 162.

  The liquid crystal elements (liquid crystal display panels) 151R, 151G, and 151B are display units each having a displayable area larger than an image display area for displaying an image to be projected. The displayable area is an area where each liquid crystal element can display an image, and the image display area is an area where each liquid crystal element displays an image. The image display area is included in the displayable area, and the size of the image display area is equal to or smaller than the size of the displayable area. Red (R) light is incident on the liquid crystal element 151R (first display means), green (G) light is incident on the liquid crystal element 151G (second display means), and the liquid crystal element 151B ( Blue (B) light is incident on the third display means. The liquid crystal control unit 150 has a function as display position control means for controlling the position of the image display area within the displayable area of each of the liquid crystal elements 151R, 151G, and 151B. Although details will be described later, this embodiment enables manual adjustment of color misregistration between display images of the liquid crystal elements (liquid crystal display panels) 151R, 151G, and 151B by using this function.

  The light source controller 160 controls the light source 161 to be turned on or off, and controls the amount of light when the light source 161 is turned on. The light source 161 generates illumination light for the liquid crystal elements 151R, 151G, and 151B. The light source 161 includes, for example, a halogen lamp, a xenon lamp, or a high-pressure mercury lamp. Output light from the light source 161 is supplied to the color separation unit 162. The output light of the light source 161 is separated or divided into red, green, and blue colors by the color separation unit 162, and each separated light enters the liquid crystal elements 151R, 151G, and 151B. The color separation unit 162 is an element that separates the output light of the light source 161 into red (R), green (G), and blue (B), and includes, for example, a dichroic mirror and a prism. In addition, when using LED etc. which output the light corresponding to each color as the light source 161, the color separation part 162 becomes unnecessary.

  The color synthesis unit 163 synthesizes the light transmitted through the liquid crystal elements 151R, 151G, and 151B. As a result, an optical image indicating the original color of the image to be displayed is generated. The color synthesizing unit 163 is an element that spatially synthesizes red (R), green (G), and blue (B) optical images transmitted through the liquid crystal elements 151R, 151G, and 151B, and includes, for example, a dichroic mirror and a prism. including. The optical image synthesized by the color synthesizing unit 163 is a full-color image and is projected onto a screen (not shown) by the projection optical system 171. In this embodiment, as will be described later, the relative positional relationship of the liquid crystal elements 151R, 151G, and 151B in the lateral direction can be manually adjusted.

  The projection optical system 171 includes a plurality of lenses and a lens driving actuator. The projection optical system 171 performs enlargement, reduction, focus adjustment, and the like of a projection image projected on the screen by driving the lenses. The optical system control unit 170 controls the magnification and focus of the projection optical system 171.

  The recording / playback unit 191 plays back still image data and moving image data from the recording medium 192, receives still image data and moving image data of images and videos obtained by the imaging unit 194 from the CPU 110, and records them on the recording medium 192. The recording / playback unit 191 also records still image data and moving image data received by the communication unit 193 on the recording medium 192. The recording medium 192 can record still image data, moving image data, control data for controlling the projector 100, and the like. The recording medium 192 may be a recording medium that can be attached to and detached from the projector 100 or a recording medium that is built in the projector 100.

  The communication unit 193 communicates with an external device and receives control signals, still image data, moving image data, and the like from the external device. For example, the communication unit 193 can use a wireless LAN, a wired LAN, USB, or Bluetooth (registered trademark), and the communication method is not limited to a specific one. When the terminal of the image input unit 130 is, for example, an HDMI (registered trademark) terminal, the communication unit 193 may perform CEC communication via the terminal. The external device is, for example, a personal computer, a camera, a mobile phone, a smartphone, a hard disk recorder, a game machine, or a remote control.

  The imaging unit 194 captures an image projected on a screen (not shown) by the projection optical system 171. The imaging unit 194 transmits the captured image data to the CPU 110. The CPU 110 temporarily stores the image data from the imaging unit 194 in the RAM 112 and converts the image data into still image data or moving image data based on a program stored in the ROM 111. The imaging unit 194 includes an imaging element that converts an optical image into an image signal, a lens that enters an optical image of a subject into the imaging element, an actuator that drives the lens, a microprocessor that controls the actuator, and an output image signal from the imaging element as a digital signal Including an AD conversion unit for converting into Note that the imaging unit 194 may capture, for example, a viewer side in a direction opposite to a screen (not shown).

  The display control unit 195 causes the display unit 196 to display an image such as an operation screen for operating the projector 100 and a switch icon. The display unit 196 may be, for example, a liquid crystal display, a CRT display, an organic EL display, or an LED display. In addition, the display unit 196 may be configured to emit an LED or the like corresponding to each button in order to post a specific button so that the user can recognize it.

  FIG. 2 is a block diagram illustrating an example of the configuration of the image processing unit 140. The image processing unit 140 includes various image processing units 210, an OSD superimposing unit 220, and a marker superimposing unit 230.

  The original image signal s201 is input to the image processing unit 140 from any one of the image input unit 130, the recording / reproducing unit 191, and the communication unit 193. The timing signal s202 is a timing signal such as a vertical synchronization signal, a horizontal synchronization signal, or a clock synchronized with the original image signal s201, and the image input unit 130, the recording / reproducing unit 191 and the communication unit that are the supply source of the original image signal s201. 193 from any one of 193. Each unit in the image processing unit 140 operates based on the timing signal s202, but the timing signal may be regenerated and used inside the image processing unit 140.

  The various image processing units 210 operate in cooperation with the CPU 110, perform various image processing on the original image signal s 201, and output the generated image processing signal s 203 to the OSD superimposing unit 220. Various image processing includes, for example, IP conversion, frame rate conversion, resolution conversion, γ conversion, color gamut conversion, color correction, and edge enhancement.

  The OSD superimposing unit 220 generates an OSD superimposed signal s204 by superimposing an adjustment menu corresponding to information from the operation unit 113 or a remote controller (not shown) as an OSD image on the image processing signal s203 according to an instruction from the CPU 110. The OSD superimposing unit 220 outputs the generated OSD superimposing signal s204 to the marker superimposing unit 230.

  In response to an instruction from the CPU 110, the marker superimposing unit 230 superimposes a predetermined marker on the OSD superimposed signal s204 in accordance with a control signal received from the operation unit 113 or the communication unit 193, and generates a marker superimposed signal s205.

  The image processing unit 140 supplies the marker superimposed signal s205 generated as described above to the liquid crystal control unit 150, and the liquid crystal control unit 150 displays images corresponding to the marker superimposed signal s205 on the liquid crystal elements 151R, 151G, and 151B. Let

  An adjustment process performed by the projector 100 will be described. The adjustment process here is a process performed by the projector 100 in order to make the user adjust the color misregistration. When the adjustment process is performed, the color misregistration is electrically corrected in accordance with a user operation. The process of electrically correcting the color misregistration is called registration adjustment or pixel misregistration adjustment. Hereinafter, in the first embodiment, the process of electrically correcting the color misregistration is referred to as “registration adjustment”.

  FIG. 3 is a flowchart illustrating an example of adjustment processing executed by the CPU 110. Note that the adjustment process shown in FIG. 3 is executed when the user operates the operation unit 113 to display the adjustment menu.

  In S301, the CPU 110 determines whether or not the projector 100 has shifted to the registration adjustment mode when the user operates the operation unit 113. When the projector 100 transitions to the registration adjustment mode (Yes in S301), the CPU 110 transitions to S302. The registration adjustment mode is a mode for electrically correcting color misregistration in accordance with an operation performed by the user.

  In order to reduce color misregistration, the user needs to perform the following operations. First, the user operates the operation unit 113 to select one of the liquid crystal element 151R, the liquid crystal element 151G, and the liquid crystal element 151B. Thereafter, the user needs to adjust the position of the image display area in the selected liquid crystal element to the position of the image display areas of the other two liquid crystal elements that are not selected by operating the operation unit 113. However, since the user cannot know the positions of the image display areas of the other two liquid crystal elements that are not selected, the user cannot adjust the position of the image display area in the selected liquid crystal elements. Therefore, the CPU 110 executes S302 and S303 so that the position of the image display area in the selected liquid crystal element can be appropriately adjusted while facilitating the user's operation.

  In S302, the CPU 110 acquires the registration adjustment amounts of the liquid crystal element 151R, the liquid crystal element 151G, and the liquid crystal element 151B from the liquid crystal control unit 150. The registration adjustment amount for the liquid crystal element 151R is, for example, information indicating how much the position of the liquid crystal element 151R in the image display area has been changed by the user. The registration adjustment amount for the liquid crystal element 151G is information indicating how much the position of the liquid crystal element 151G in the image display area has been changed by the user, for example. The registration adjustment amount for the liquid crystal element 151B is information indicating how much the position of the liquid crystal element 151B in the image display area has been changed by the user.

  In S303, the CPU 110 performs display processing based on the registration adjustment value acquired in S302. The display process in S303 is a process of controlling the marker superimposing unit 230 so as to display a predetermined image for simplifying the adjustment to be performed by the user. The displayed predetermined image includes an image indicating the position of the image display area of the currently selected liquid crystal element and an image indicating a changeable range of the position of the image display area of the currently selected liquid crystal element. Further, the predetermined image includes an image indicating the position of the image display area of each liquid crystal element that is not currently selected, and an image that indicates a range in which the position of the image display area of each liquid crystal element that is not currently selected can be changed.

With reference to FIG. 4, an example of a predetermined image displayed in the display process in S303 will be described. FIG. 4A illustrates a configuration example of the liquid crystal element 151R and the liquid crystal element 151G. The liquid crystal element 151B also has the same configuration as the liquid crystal element 151R and the liquid crystal element 151G.
In order to simplify the description, the description of the liquid crystal element 151B is omitted.

  A region including all pixels of the liquid crystal element 151R is referred to as a total pixel region (displayable region) 420r, and a region used for displaying an image on the screen is referred to as an image display region 410r in the total pixel region 420r. An area including all the pixels of the liquid crystal element 151G is referred to as a total pixel area 420g (displayable area), and an area used for displaying an image on the screen is referred to as an image display area 410g in the total pixel area 420g. .

  For example, when the user selects the liquid crystal element 151R from among the liquid crystal elements 151R, 151G, and 151B using the operation unit 113, the position of the image display region 410r in the total pixel region 420r is changed using the operation unit 113. it can. At this time, since the liquid crystal element 151G is not selected by the user, even if the user operates the operation unit 113, the position of the image display area 410g in the total pixel area 420g is not changed.

  Hereinafter, as an example, a case where the user selects the liquid crystal element 151R from among the liquid crystal element 151R, the liquid crystal element 151G, and the liquid crystal element 151B using the operation unit 113 will be described with respect to the process of S303. In this case, in S303, the CPU 110 controls the marker superimposing unit 230 to display the position adjustment marker mk401r, the current position marker mk402r, the position adjustment marker mk401g, and the current position marker mk402g as display processing.

  The position adjustment marker mk401r is an image showing a changeable range of the position of the image display area 410r of the currently selected liquid crystal element 151R. The position adjustment marker mk401r is displayed at a specific position in the total pixel area 420r. The position where the position adjustment marker mk401r is displayed in the total pixel area 420r is not changed even if the user operates the operation unit 113.

  The current position marker mk402r is an image indicating the current position of the image display area 410r of the currently selected liquid crystal element 151R. The current position marker mk402r indicates the current position of the image display area 410r in the total pixel area 420r relative to the position adjustment marker mk401r. The current position marker mk402r is displayed at a specific position in the image display area 410r. The position where the current position marker mk402r is displayed in the image display area 410r is changed according to the operation performed on the operation unit 113 when the user operates the operation unit 113.

  As shown in FIG. 4A, the current position marker mk402r is displayed in the position adjustment marker mk401r. The range in which the current position marker mk402r can move within the position adjustment marker mk401r is a range in which the position of the image display area 410r can be changed. That is, the range Wd1r in which the current position marker mk402r can move upward in the position adjustment marker mk401r corresponds to the range W1r in which the image display region 410r can move upward in the total pixel region 420g. Similarly, the range Wd2r in which the current position marker mk402r can move in the right direction corresponds to the range W2r in which the image display region 410r can move in the right direction in the total pixel region 420g. A range Wd3r in which the current position marker mk402r can move downward corresponds to a range W3r in which the image display region 410r can move downward in the total pixel region 420g. The range Wd4r in which the current position marker mk402r can move to the left corresponds to the range W4r in which the image display region 410r can move to the left in the total pixel region 420g. The current position marker mk402r can move only within the position adjustment marker mk401r, and the image display area 410r can move only within the total pixel area 420g.

  The position adjustment marker mk401g is an image showing a changeable range of the position of the image display area 410g of the liquid crystal element 151G that is not currently selected. The position adjustment marker mk401g is displayed at a specific position in the total pixel area 420g. The position where the position adjustment marker mk401g is displayed in the total pixel area 420g is not changed even if the user operates the operation unit 113.

  The current position marker mk402g is an image indicating the current position of the image display area 410g of the liquid crystal element 151G that is not currently selected. The current position marker mk402r indicates the current position of the image display area 410g in the total pixel area 420g relative to the position adjustment marker mk401g. The current position marker mk402g is displayed at a specific position in the image display area 410g. The position where the current position marker mk402g is displayed in the image display area 410r is not changed when the user operates the operation unit 113, even if it is performed on the operation unit 113.

  As shown in FIG. 4A, the current position marker mk402g is displayed in the position adjustment marker mk401g. The range in which the current position marker mk402g is movable within the position adjustment marker mk401g is the position changeable range of the image display area 410g. That is, the range Wd2g in which the current position marker mk402g can move in the right direction corresponds to the range W2g in which the image display region 410g can move in the right direction in the total pixel region 420g. The range Wd3g in which the current position marker mk402g can move downward corresponds to the range W3g in which the image display region 410g can move downward in the total pixel region 420g. The range Wd4g in which the current position marker mk402g can move in the left direction corresponds to the range W4g in which the image display region 410g can move in the left direction in the total pixel region 420g. Note that the current position marker mk402g can move only within the position adjustment marker mk401g, and the image display area 410g can move only within the total pixel area 420g. In the example shown in FIG. 4A, the current position marker mk402g cannot move upward, and the image display area 410g cannot move upward.

  When the display process of S303 is performed, the CPU 110 controls the projector 100 to project an image as shown in FIG. 4B on the screen. The position adjustment marker mk401r, the current position marker mk402r, the position adjustment marker mk401g, the current position marker mk402g, the image display area 410r, and the image display area 410g are displayed on the screen in the positional relationship shown in FIG. The user can operate the operation unit 113 so that the current position marker mk402r overlaps the current position marker mk402g while confirming the display shown in FIG.

  In the example shown in FIG. 4B, the user visually indicates a range in which the position of the image display area 410r of the liquid crystal element 151R can be changed and a range in which the position of the image display area 410g of the liquid crystal element 151G can be changed. The position of the image display area 410r can be adjusted while checking. Therefore, the projector 100 can prevent the user from making adjustments that change the position of the image display area 410r in a direction that deviates from the position of the image display area 410g.

  When the display as shown in FIG. 4B is performed in S303, the user can visually understand that the operation unit 113 may be operated to move the position of the image display area 410r downward. Color misregistration can be easily adjusted.

  In S303, the CPU 110 may display the position adjustment marker mk401r, the current position marker mk402r, the position adjustment marker mk401g, and the current position marker mk402g on the screen.

  The user operates the operation unit 113 to adjust the position of the image display area 410r while confirming the image displayed in S303. In step S <b> 304, the CPU 110 performs registration adjustment in accordance with the user operation input to the operation unit 113. The registration adjustment process performed in S304 will be described with reference to FIG.

  FIG. 5A shows the relationship between the image signal and the vertical synchronization signal Vsync. The image 510 on the image signal is input at a constant timing with the vertical synchronization signal Vsync as a reference. An image 510 is drawn by an image displayed in the image display area of each liquid crystal element. Upon receiving an instruction from the CPU 110, the liquid crystal control unit 150 supplies the liquid crystal elements 151R, 151G, and 151B with a panel drawing start signal VST and an image signal that are individually generated based on the vertical synchronization signal Vsync. The liquid crystal elements 151R, 151G, and 151B start drawing image signals by the number of display pixels based on the input panel drawing start signal VST (see FIG. 4B). That is, the drawing position of the image 510 on the panel drawing area 520 is determined by the panel drawing start signal VST, and the display position of the image 510 displayed on the screen is determined. The display position of the image 510 can be adjusted by shifting the phase of the panel drawing start signal VST generated by the liquid crystal controller 150 with respect to the vertical synchronization signal Vsync. For example, the CPU 110 can adjust the position of the image display area 410r of the liquid crystal element 151R by controlling the phase amount of the panel drawing start signal VST supplied to the liquid crystal element 151R with respect to the vertical synchronization signal Vsync.

  When the position of the image display area 410r of the selected liquid crystal element 151R is adjusted in S304, the CPU 110 shifts the phase of the panel drawing start signal VST supplied to the liquid crystal element 151R according to the operation from the user. The liquid crystal controller 150 is controlled.

  After S304 is performed, the user can select whether to continue or complete the registration adjustment and change the liquid crystal element to be adjusted. In step S <b> 305, the CPU 110 determines whether or not registration adjustment is completed in accordance with an operation on the operation unit 113 from the user. If the CPU 110 determines that the registration adjustment is completed, the CPU 110 returns to S302.

  When the user selects completion of registration adjustment on the operation unit 113 (Y in S305), in S306, the CPU 110 controls the marker superimposing unit 230 to end the display process in S303. As a result, the position adjustment marker mk401r, the current position marker mk402r, the position adjustment marker mk401g, and the current position marker mk402g are not displayed on the screen.

  As described above, according to the first embodiment, the user can perform registration adjustment while checking the movable range of the image display area of each liquid crystal element on the screen. As a result, it becomes possible for the user to appropriately perform the registration adjustment, and it is possible to reduce a situation in which the user performs the registration adjustment again.

  In the above description, the shapes of the current position markers mk402r and mk402g are described as rectangles, but the present invention is not limited to this. For example, a size proportional to the image display area may be displayed by a cross-shaped line segment having a width of one pixel or more. The current position markers mk402r and mk402g only need to indicate the four sides or four corners of the quadrilateral corresponding to the image display area. For example, the T-shape, the cross shape, or the brackets (“,” It may be a shape that clearly shows a corner such as). The position adjustment markers mk401r and mk401g need only indicate four sides or four corners of a quadrilateral corresponding to the displayable area. The position adjustment markers mk401r and mk401g are generated according to the shapes of the current position markers mk402r and mk402g.

  The gradation values of the current position markers mk402r and mk402g and the position adjustment markers mk401r and mk401g are not limited to gradations corresponding to white or black. For example, a gradation marker corresponding to a complementary color may be displayed in consideration of the gradation of the background video signal. Alternatively, the markers may be blinked by time division.

  In S303, the marker mk600r may be displayed outside the image display area 410r, and the marker mk600g may be displayed outside the image display area 410g. In the second embodiment, a case where the marker mk600r is displayed outside the image display area 410r and the marker mk600g is displayed outside the image display area 410g will be described. In the second embodiment, processing and functions different from those in the first embodiment will be described, but descriptions of processes and functions common to the first embodiment will be omitted. The following describes S303 in the second embodiment.

  The operation of the second embodiment will be described by taking as an example a case where the user selects the liquid crystal element 151R from among the liquid crystal elements 151R, 151G, and 151B using the operation unit 113.

  In S303, the CPU 110 displays the image display area 410r, the image display area 410g, the marker mk600r, and the marker mk600g as predetermined images on the screen. An example of the marker mk600r and the marker mk600g is shown in FIG.

  As shown in FIG. 6A, an image display area 410r is provided as a part of the total pixel area (displayable area) 420r of the liquid crystal element 151R. An image display area 410g is provided as a part of the total pixel area (displayable area) 420g of the liquid crystal element 151G. The marker mk600r is an image in which an area other than the image display area 410r in the total pixel area (displayable area) 420r is filled with a specific color, and the marker mk600g is a specific color in an area other than the image display area 410g in the total pixel area 420g. It is an image filled with. An area indicated by the marker mk600r indicates a range in which the image display area 410r can be moved, and an area indicated by the marker mk600g indicates a range in which the image display area 410g can be moved.

  It is assumed that the liquid crystal element 151R is selected by the user and the display process of S303 is executed. At this time, the CPU 110 displays the marker mk600r and the marker mk600g, the image display area 410r and the image display area 410g on the screen as shown in FIG. The user refers to the markers mk600r and mk600g and the image display areas 410r and 410g, and adjusts the position of the image display area 410r with the operation unit 113 so that the image display area 410r overlaps the image display area 410g. In the example shown in FIG. 6B, the position changeable range of the image display area 410r of the selected liquid crystal element 151R and the position changeable range of the image display area 410g of the non-selected liquid crystal element 151G are visually compared. The position of the image display area 410r can be adjusted while checking. Adjustment that changes the position of the image display area 410r in a direction deviating from the position of the image display area 410g can be reduced.

  Also in the second embodiment, even when the user selects the liquid crystal element 151G or the liquid crystal element 151B as a registration adjustment target, the same processing as when the liquid crystal element 151R is selected in S303 in the second embodiment is performed.

  The marker mk600r and the marker mk600g are not limited to a type of expression that is painted with a specific color. For example, the marker mk600r and the marker mk600g may be displayed by controlling the gradation only in the outermost pixel of the total pixel region of the liquid crystal element.

  As in the first embodiment, the gradation values of the marker mk600r and the marker mk600g are not limited to gradations corresponding to white or black. For example, a gradation marker corresponding to a complementary color may be displayed in consideration of the gradation of the background video signal. Further, the marker mk600r and the marker mk600g may be blinked.

  The CPU 110 can display the marker mk600r and the marker mk600g by giving an instruction to the marker superimposing unit 230 and controlling the gradation of the area other than the image display area of the OSD superimposed signal s204.

  In the second embodiment, the movable ranges of the image display areas 410r and 410g are displayed in areas outside the image display areas 410r and 410g in the total pixel areas 420r and 420g. By doing so, the user can visually confirm the relative range in which the image display areas 410r and 410g displayed on the screen can be adjusted.

  As described above, the movable range of the image display areas 410r and 410g is displayed so as to be superimposed on the area outside the display image in the total pixel area, so that the user can set the position adjustable range of the image display area. Can be visually recognized. Thereby, it becomes possible for the user to appropriately perform the registration adjustment, and it is possible to reduce a situation that causes the user to redo the registration adjustment.

(Other examples)
The projector 100 according to the present invention is not limited to the projector 100 described in the first and second embodiments. For example, the projector 100 according to the present invention can be realized by a system including a plurality of devices.

  The various processes and functions described in the first and second embodiments can also be realized by a computer program. In this case, the computer program according to the present invention can be executed by a computer (including a CPU and the like), and implements various functions described in this embodiment.

  It goes without saying that the computer program according to the present invention may realize various processes and functions described in this embodiment by using an OS (Operating System) running on the computer.

  The computer program according to the present invention is read from a computer-readable recording medium and executed by the computer. As the computer-readable recording medium, a hard disk device, an optical disk, a CD-ROM, a CD-R, a memory card, a ROM, or the like can be used. The computer program according to the present invention may be provided from an external device to a computer via a communication interface and executed by the computer.

Claims (4)

A plurality of display means capable of changing an image display area for displaying a display image in each displayable area;
Projection means for projecting an optical image generated by optically combining light from the plurality of display means by a combining unit;
Control means for moving the image display area of each of the plurality of display means within the displayable area;
In the adjustment mode for adjusting a deviation between the display images of said plurality of display means, each of said plurality of display means, the position adjustment marker indicating the movable range in the displayable area of the image display area, an image processing means for displaying a current position marker indicating the current position of the image display area,
Operating means for selecting one of the plurality of display means and instructing movement of the image display area of the selected display means,
The projection device according to claim 1, wherein the control means moves the image display area of the selected display means in accordance with an instruction from the operation means. The projection device according to claim 1 , wherein the position adjustment marker has a color outside the current position marker . The projection apparatus according to claim 1 , wherein the current position marker includes a line segment having a width of one pixel or more indicating a shape corresponding to the image display area. Said plurality of display means, the projection apparatus according to any one of claims 1 to 3, characterized in that it comprises three liquid crystal means for displaying images of different colors, respectively.

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