JP2006054824A - Projection image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a projection image display device which can easily perform trapezoid distortion correction. <P>SOLUTION: In the projection image display device 10, the boundary line of a video image and a screen is made easy to recognize by (1) composing the video image based on image data inputted by a video image input 1, and a frame line based on frame line data memorized in a data storing region 41b; and (2) projecting and displaying the synthesized video image and the frame line on a screen. Since a user can easily recognize that the video image is distorted in a trapezoid shape, or the video image is corrected, and becomes a rectangular shape based on the video image, and the frame line displayed on the screen; the user can easily perform correction of the trapezoid distortion by (1) recognizing the frame line projected and displayed on the screen, a boundary line of the frame line and the video image, and a boundary line of the frame line and the screen by eyes; and at the same time, (2) performing correction processing for the video image distorted in the trapezoid shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projection-type image display device.

  2. Description of the Related Art Conventionally, there is known a projection type image display apparatus such as a projector that displays an image by modulating light emitted from a light source by a display device such as a liquid crystal panel and then projecting the light on a screen through an optical lens.

  As shown in FIG. 4, when the projection display apparatus P projects an image with the projection optical axis T inclined with respect to the screen S, a rectangular image is displayed on the screen S as a trapezoidally distorted image. Therefore, various techniques for correcting this trapezoidal distortion have been proposed. (For example, see Patent Documents 1, 2, 3, and 4).

  In the projection type image display devices described in Patent Documents 1 and 2, the user manually operates the operation button or the movement key in the operation input unit while visually checking the image projected on the screen. A trapezoidal distortion in a vertical direction or a horizontal direction of a projected image is corrected.

  Moreover, in the projection type video display apparatus described in Patent Document 3, an image projected on a screen is captured by a camera, and trapezoidal distortion is corrected based on the captured image information.

Further, in the projection type video display device described in Patent Document 4, it has been known that the trapezoidal distortion has been corrected by performing correction calculation using a geometric relational expression including a trigonometric function. By using the equation, the amount of correction calculation is reduced, and faster correction processing is possible.
JP 2003-46908 A JP 2003-304552 A JP 2003-283964 A JP 2003-29714 A

  However, in the case of the above Patent Documents 1 and 2, when correcting the trapezoidal distortion, the user operates while looking at the boundary line portion outside the video and the pointer (correction function display) displayed in the video and the video. To operate the input unit, for example, when a relatively dark image is displayed and it is difficult to visually recognize the boundary line of the image, or when an image of the same color as the pointer is displayed and it is difficult to visually recognize the position of the pointer, the keystone distortion There is a problem that it may be difficult to perform correction.

  In the case of Patent Document 3, a camera that captures an image projected on a screen is required. This increases the cost of the apparatus and processes the image captured by the camera, which is complicated. There was a problem that correction processing would be required.

  In the case of Patent Document 4, since a simpler relational expression is used, it is difficult for the user to understand, but there is a problem that correction processing with a slight error is performed.

The subject of this invention is providing the projection type video display apparatus which can perform trapezoid distortion correction more easily.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a projection-type image display device, wherein the image input means for inputting the image projected on the screen, and the first black image indicating the outer frame of the image. A frame line storage unit that stores a second frame line adjacent to the outside of the first frame line, a video input by the video input unit, and a memory stored in the frame line storage unit The first frame line and the second frame line that are combined, a projection unit that projects the image and each frame line synthesized by the synthesis unit onto the screen, and a projection by the projection unit. And correction means for correcting trapezoidal distortion of the framed image and each frame line.

  The invention according to claim 2 is a projection-type image display device, wherein image input means for inputting an image projected on a screen, frame line storage means for storing a frame line indicating an outer frame of the image, and A synthesizing unit that synthesizes the video input by the video input unit and the frame line stored in the frame line storage unit; and a projection unit that projects the video and the frame line synthesized by the synthesizing unit onto the screen. Correction means for correcting trapezoidal distortion of the image projected by the projection means and the frame line.

  According to a third aspect of the present invention, in the projection display apparatus according to the second aspect, the frame line includes a first frame line and a second frame line adjacent to the outside of the first frame line. The first frame line and the second frame line are different in color.

  According to a fourth aspect of the present invention, in the projection display apparatus according to the third aspect, the first frame line is black and the second frame line is white.

  According to the first aspect of the present invention, the projection-type image display device includes an image input by the image input means, and a black first frame line indicating an outer frame of the image stored in the frame line storage means. The white second frame line adjacent to the outside of the first frame line is synthesized, and the synthesized image and each frame line can be projected and displayed on the screen. In other words, it is possible to display so that the black first frame line is synthesized around the image projected on the screen and the white second frame line is synthesized outside the first frame line. Makes it easier to see the boundary line between the screen and the screen.

  In particular, the black first frame line is displayed on the relatively bright inner image side where the image is displayed, and the white second frame line is displayed on the relatively dark screen side arranged in the dark place. The boundary line between the video and the first frame line, the boundary line between the screen and the second frame line, and the boundary line between the first frame line and the second frame line can be easily recognized. In addition, since the screen is generally white, by making the second frame line white, the black first frame line will stand out, and the first frame line, the second frame line, It becomes easy to visually recognize the boundary line.

  In other words, even when there is a variation in the darkness of the portion where the screen on which the video is displayed is arranged and the brightness of the video projected and displayed on the screen, the video and the first It is easy to visually recognize the boundary line of the frame line and the boundary line of the screen and the second frame line. In particular, the boundary line between the first frame line displayed in black and the second frame line displayed in white is clearly displayed, and the boundary line is easily visually recognized and recognized. Will be able to.

  Based on the images projected and displayed on the screen and the frame lines, the user can easily recognize that the image is distorted into a trapezoidal shape or that the image is corrected to a rectangular shape by the correcting means. be able to.

Therefore, the user can set the black and white border lines projected on the screen, the border line between the black first border line and the image, and the border line between the white second border line and the screen. Since it is possible to perform correction processing on an image distorted in a trapezoidal shape while visually recognizing it, the trapezoidal distortion can be corrected more easily.

  According to the second aspect of the present invention, the projection type video display apparatus combines the video input by the video input means and the frame line indicating the outer frame of the video stored in the frame line storage means, The synthesized image and frame line can be projected and displayed on the screen. That is, since the frame line can be displayed around the image projected on the screen, the boundary line between the image and the screen can be easily seen.

  Based on the image and the frame line projected and displayed on the screen, the user can easily recognize that the image is distorted into a trapezoidal shape or that the image is corrected to a rectangular shape by the correcting means. Can do.

  Therefore, the user can perform correction processing on the image distorted into a trapezoidal shape while visually checking the frame line projected and displayed on the screen, the boundary line between the frame line and the image, and the boundary line between the frame line and the screen. Since it can be performed, the trapezoidal distortion can be corrected more easily.

  According to the invention described in claim 3, it is of course possible to obtain the same effect as that of the invention described in claim 2. In particular, the frame line includes the first frame line and the outside of the first frame line. Are adjacent to each other, and the colors of the respective frame lines are different.

  In other words, there are variations in the brightness and darkness of the location where the screen on which the image is displayed is arranged, and the brightness and darkness of the image projected and displayed on the screen. Even if it is difficult to visually recognize the boundary line between the first frame and the second frame line, the boundary line between the first frame line and the second frame line is clearly visible. Can be recognized.

  Therefore, it is possible to perform correction processing on the image distorted in a trapezoidal shape while visually recognizing the boundary line between the first frame line and the second frame line projected and displayed on the screen together with the image. The trapezoidal distortion can be preferably corrected.

  According to the invention described in claim 4, it is of course possible to obtain the same effect as that of the invention described in claim 3. In particular, the first frame line is black and the second frame line is white. Therefore, the user can visually recognize and recognize the boundary line between the first frame line and the second frame line more clearly.

  In particular, the black first frame is displayed on the relatively bright inner side where the image is displayed, and the white second frame is displayed on the relatively dark screen side arranged in the dark place. The boundary line of the first frame line, the boundary line of the screen and the second frame line, and the boundary line of the first frame line and the second frame line can be easily recognized, and the trapezoidal distortion is corrected more appropriately. can do.

  Embodiments of a projection type video display apparatus according to the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a main configuration of a projection type video display apparatus according to the present invention.

  As shown in FIG. 1, the projection display apparatus 10 includes a video input unit 1, a projection unit 2, an operation unit 3, a storage unit 4, a CPU 5, a RAM 6, and the like, which are connected via a bus B. .

  The video input unit 1 functions as video input means and is electrically connected to, for example, a personal computer or the like, and receives video data of a video to be projected on a screen.

  The video data input by the video input unit 1 is stored in a data storage area 41b of the storage unit 4 described later under the control of the CPU 5.

The projection unit 2 includes, for example, a projection lens (not shown) and the like, and projects a video based on the video data input by the video input unit 1 on the screen according to the control of the CPU 5 as a part of the projection unit. Function.

  In particular, the projection unit 2 as a projection unit can project an image in which a frame line is combined with a video onto a screen and display the video and the frame line on the screen in accordance with an operation of an operation unit 3 described later. It can be done.

  The operation unit 3 includes a correction key 31 for performing an operation input for correcting the image projected on the screen and the trapezoidal distortion of the frame line, a main switch (not shown) for starting image projection, and the like. . The correction key 31 includes, for example, a “+” key and a “−” key (not shown).

  When the correction key 31 is pressed by the user, a composition program described later is executed so that the video data and the frame line data are combined. While the correction key 31 is pressed, An image in which a frame line is combined with an image is projected onto a screen and displayed. That is, when the correction key 31 is not pressed, only the video is projected and displayed on the screen.

  The storage unit 4 has a recording medium 41 in which various programs and various data are stored in advance. The recording medium 41 is configured by, for example, a magnetic recording medium, an optical recording medium, a semiconductor memory, or the like. The recording medium 41 is provided fixedly or detachably with respect to the storage unit 4.

  The recording medium 41 is provided with a program storage area 41a for storing various programs used for video display processing and a data storage area 41b for storing various data.

  In the data storage area 41b, video data 401 input by the video input unit 1 is stored.

  Further, the data storage area 41b functions as a frame line storage unit, and stores frame line data 402 related to the frame line displayed on the screen.

  The frame line data 402 is, for example, image data regarding an inner frame line as a first frame line and an outer frame line as a second frame line adjacent to the outside of the inner frame line.

  The inner frame line is a frame line synthesized so as to be adjacent to the periphery of the video based on the video data, and is displayed as a black line having a predetermined width.

  The outer frame line is a frame line synthesized so as to be adjacent to the outside of the inner frame line, and is displayed as a white line having a predetermined width.

  In the program storage area 41a, system programs and application programs for performing various operations in the CPU 5 are stored. Specifically, a projection program 411, a composition program 412, and a correction program 413 are stored.

  The CPU 5 stores various application programs, system programs, and the like stored in the storage unit 4 in the RAM 6 and executes various processes according to the application programs stored in the RAM 6 according to various instruction signals and input data. . Further, the CPU 5 temporarily stores the processing result in the RAM 6.

  Then, the CPU 5 executes a projection program 411 to perform control for projecting and displaying a video based on the video data on the screen.

  In particular, the CPU 5 functions as a part of the projecting unit, executes a synthesis program described later, synthesizes the video data 401 and the frame line data 402, and projects an image in which the frame line is combined with the video onto the screen. Control to display.

  Further, the CPU 5 functions as a synthesizing unit, and executes control for synthesizing the video data 401 input from the video input unit and the frame data 402 stored in the data storage area 41b by executing the synthesis program 412. Do.

  Note that the CPU 5 as the synthesizing unit executes the synthesizing program 412 when the correction key 31 of the operation unit 3 is pressed.

  Further, the CPU 5 functions as a correction unit, and executes a correction program 413 to perform control for correcting the image projected by the projection unit 2 and the trapezoidal distortion of the frame line.

  Specifically, the CPU 5 as the correction unit executes the correction program 413 based on the pressing of the correction key 31 of the operation unit 3 to correct the vertical or horizontal trapezoidal distortion of the image projected on the screen. Correction is performed so that the image projected on the screen has a substantially rectangular shape. That is, when the user operates the correction key 31 of the operation unit 3 while looking at the screen image and determines that the image has become substantially rectangular, the correction process is ended by stopping the operation of the operation unit 3. ing.

  The RAM 6 has a storage area for storing various programs and data when the CPU 5 executes the program stored in the storage unit 4. Further, it has a work area for executing processing by the CPU 5, a storage area for temporarily storing data related to the processing of the CPU 5, and the like.

  Next, an example of video display processing performed using the projection video display device 10 will be described based on the flowchart shown in FIG. 2 and the explanatory diagram of the video display state shown in FIG.

  First, when the CPU 5 determines that a video projection start signal has been input based on a user operating a main switch (not shown) (step S101; Yes), the CPU 5 stores the data in the data storage area 41b. The video based on the video data 401 that has been recorded is projected on the screen (step S102).

  Here, as shown in FIG. 3 (a), the image projected and displayed on the screen is distorted in a trapezoidal shape, distorted in the horizontal direction of the image, the upper end side of the image is long, and the lower end side of the image is short. It is displayed.

  Next, the CPU 5 determines whether or not there is an input of a correction signal when the correction key 31 is pressed by the user (step S103).

  When the CPU 5 determines that no correction signal is input (step S103; No), the process returns to step S102.

  On the other hand, when the CPU 5 determines that a correction signal has been input (step S103; Yes), the CPU 5 performs a frame line combining process for combining the frame line data 402 stored in the data storage area 41b with the video data 401. Then, as shown in FIG. 3B, a black inner frame line I and a white outer frame line O adjacent to the periphery of the video are projected and displayed together with the video (step S104).

  While the CPU 5 detects the input of the correction signal, it continues to display the inner frame line I and the outer frame line O, and based on the operation of the correction key 31 by the user, the video and the inner frame line I and Correction processing for correcting the distortion of the trapezoidal shape is performed so that the upper end side of the outer frame line O is shortened or the lower end side of the image is lengthened (step S105).

  Next, the CPU 5 determines whether or not the input of the correction signal is continued (step S106).

  When the CPU 5 determines that a correction signal is input (step S106; Yes), the process returns to step S104.

On the other hand, when the CPU 5 determines that no correction signal is input (step S106; No),
The CPU 5 stops synthesizing the frame line data 402 with the video data 401 (frame line release processing), and projects and displays only the video based on the video data 401 (step S107).

  That is, as shown in FIG. 3C, when the screen image is substantially rectangular and the user determines that the image has become rectangular, the user stops the operation of the correction key 31, thereby canceling the frame line release process. Is done. Then, the correction process is completed, and as shown in FIG. 3D, an image distorted in a trapezoidal shape is displayed as an image corrected to a rectangle.

  Thus, since the projection type video display device 10 according to the present invention can display the black inner frame line I and the white outer frame line O around the video image projected on the screen. This makes it easier to visually recognize the boundary line between the image and the screen. In particular, the black inner frame line I is displayed on the relatively bright inner side where the image is displayed, and the white outer frame line O is displayed on the relatively dark screen side arranged in the dark place. The boundary line of the line I, the boundary line of the screen and the outer frame line O, and the boundary line of the inner frame line I and the outer frame line O can be easily visually recognized. In addition, since the screen is generally white, by making the outer frame line O white, the black inner frame line I stands out, and the boundary line between the inner frame line I and the outer frame line O is visually recognized. It becomes easy to do.

  That is, the user can easily recognize that the video is distorted into a trapezoidal shape based on the inner frame line I and the outer frame line O that are combined with the video and displayed. Then, when the correction key 31 of the operation unit 3 is operated to correct the image distorted in the trapezoidal shape, the user is based on the inner frame line I and the outer frame line O that are combined with the image and displayed. It can be easily recognized that the image has been corrected to be rectangular.

  Therefore, if the projection type video display device 10 is capable of combining and displaying the black inner frame line I and the white outer frame line O around the video displayed on the screen in this way, the trapezoidal distortion of the video Can be easily corrected.

  In the above embodiment, the configuration for correcting the trapezoidal distortion of the composite image of the image and the frame line (inner frame line I, outer frame line O) is shown, but the present invention is not limited to this, for example, The trapezoidal distortion of the image and the frame line may be corrected, and the corrected images may be combined and displayed, and the correction timing is arbitrary.

  Further, although the inner frame line I is composed of a black line and the outer frame line O is composed of a white line, the color of the frame line is arbitrary and may be configured to be changed to another color. In this case, it is preferable that the user can select the color that is most easily visible by the video displayed on the screen.

  Further, the present invention is not limited to displaying the two frame lines of the inner frame line I and the outer frame line O, and one frame line may be displayed.

  The application of the present invention is not limited to the above-described embodiment, and it is needless to say that changes can be made as appropriate without departing from the spirit of the present invention.

It is a block diagram which shows the principal part structure of the projection type video display apparatus concerning this invention. It is a flowchart of the video display process of the projection type video display apparatus concerning this invention. It is explanatory drawing of the image | video display state in a projection type video display apparatus, The distortion | strained image | video (a) before correction processing, the image | video (b) which combined the frame line before correction processing, and the frame line just before completion | finish of correction processing are synthesize | combined The corrected image (c) and the corrected image (d). It is explanatory drawing at the time of a projection type video display apparatus projecting an image | video by inclining a projection optical axis with respect to a screen.

Explanation of symbols

1 Video input section (Video input means)
2 Projection part (projection means)
3 Operation section 31 Correction key 4 Storage section 41 Storage medium 41a Program storage area 411 Projection program 412 Composition program 413 Correction program 41b Data storage area (frame line storage means)
401 Video data 402 Frame data 5 CPU (projection means, composition means, correction means)
6 RAM
10 Projection-type image display device I Inner frame line (first frame line)
O Outer frame line (second frame line)

Claims (4)

Video input means for inputting video projected on the screen;
A black line indicating the outer frame of the video, and a frame storage means for storing a white second frame adjacent to the outside of the first frame;
A synthesizing unit that synthesizes the video input by the video input unit and the first frame line and the second frame line stored in the frame line storage unit;
Projection means for projecting the image and each frame line synthesized by the synthesis means onto the screen;
Correction means for correcting the image projected by the projection means and the trapezoidal distortion of each frame line;
A projection-type image display device comprising: Video input means for inputting video projected on the screen;
Frame line storage means for storing a frame line indicating an outer frame of the video;
Combining means for combining the video input by the video input means and the frame line stored in the frame line storage means;
Projection means for projecting the image and the frame line synthesized by the synthesis means onto the screen;
Correction means for correcting trapezoidal distortion of the image and the frame line projected by the projection means;
A projection-type image display device comprising:   The frame line includes a first frame line and a second frame line adjacent to the outside of the first frame line, and the first frame line and the second frame line have different colors. The projection type image display device according to claim 2, wherein   The projection-type image display apparatus according to claim 3, wherein the first frame line is black and the second frame line is white.

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