JP4886300B2 - Projection type display device and OSD display method - Google Patents

Description

  The present invention relates to a projection display device that projects an image or the like on a screen, and more particularly, to an OSD (on-Screen Display) display method.

  The projection display device is originally designed to project a rectangular image on the screen, but depending on the mounting angle of the screen, it is distorted into a trapezoid and projected. As a means for solving such a problem, a projection display apparatus generally has a trapezoidal correction function for correcting distortion of an image to be projected and adjusting the projection image into a rectangle.

  In addition to the projected image, OSD is known as means for adjusting the brightness, contrast, input video source, volume, and the like of the projected image on the screen, and trapezoidal distortion also occurs in this OSD. When only the image to be projected is trapezoidally corrected, the OSD may be missing from the screen if the OSD extends beyond the trapezoidally corrected image frame. As a means for solving these problems, a projection display device that similarly performs trapezoidal correction for OSD is known (for example, Patent Document 1).

According to this projection type display device, distortion correction is performed after the OSD and the image to be projected are combined. Therefore, even when the screen cannot be accurately attached, both the OSD and the projected image are projected on the screen with the keystone corrected. be able to.
JP 2000-330507 A

  However, according to the conventional projection display device, it is necessary to perform distortion correction at a stage after the image to be projected with the OSD is synthesized. When the OSD requires a device design that cannot perform distortion correction, the OSD is missing. , And obfuscation occurs.

  Accordingly, an object of the present invention is to provide a projection display device and an OSD display method capable of correcting distortion of a projected image with respect to trapezoidal distortion and capable of displaying without missing from the screen even when the distortion of OSD cannot be corrected. It is in.

(1) In order to achieve the above object, the present invention provides a scaler for converting a projected image with a desired aspect ratio and correcting trapezoidal distortion, and an OSD (on-Screen Display) in the projected image before correcting the keystone distortion of the scaler. a reference point coordinate before correction is a display position, the calculated reference point offset value from the difference between the corrected reference point coordinate is OSD display position after keystone distortion correction, based on the reference point offset value, the pre-correction the reference point coordinates as a reference point coordinates coordinates after movement is moved, and the OSD menu generating section that generates an OSD menu image, and the projection image that is trapezoidal distortion correction by the scaler, the OSD menu generating section There is provided a projection display device characterized by including a combining unit that combines the generated OSD menu image .

  According to such a configuration, since the OSD can be displayed at an appropriate position by acquiring the offset values of the reference points before and after trapezoid correction, the OSD is projected even when distortion correction cannot be performed on the OSD. It is no longer displayed outside the image.

(2) The present invention for achieving the above object, acquires converts the projected image in a desired aspect ratio, and a scaler to trapezoidal distortion correction, the display range of the projection image after the keystone distortion correction that by the scaler, An OSD menu generation unit for generating an OSD menu image by sequentially deleting OSD menu items in accordance with pre-registered menu priorities so that the OSD display range is within the displayable range of the projection image, and the keystone correction by the scaler A projection type display device is provided that includes a combining unit that combines the projected image thus generated and the OSD menu image generated by the OSD menu generation unit .

  According to such a configuration, since the OSD can be displayed at an appropriate position by acquiring the offset value of the reference point by the keystone correction, even when the distortion cannot be corrected with respect to the OSD, the OSD is missing from the projected image. Will not be displayed.

(3) In order to achieve the above object, the present invention achieves the above-described object by performing a first step of acquiring the pre-correction reference point coordinates of the display position of the OSD displayed in the projection image, and the post-correction movement based on the trapezoidal distortion correction by the scaler. a second step of acquiring the reference point coordinate, and a third step of obtaining an offset value by taking the difference between said pre-correction reference point coordinates the corrected reference point coordinate and based on the said offset value , A fourth step of generating an OSD menu image using the coordinates after the movement of the reference point coordinates before correction as reference point coordinates, the projection image corrected for trapezoidal distortion by the scaler, and the fourth step An OSD display method comprising: a fifth step of combining the OSD menu image generated in the step .

  According to such a method, an OSD display method having the effect of (1) can be achieved.

( 4 ) In order to achieve the above object, the present invention achieves the OSD according to the first step of acquiring the video displayable range from the projection image after the trapezoidal distortion correction by the scaler and the menu display priority stored in the OSD menu generation unit. A second step of deleting the OSD menu item , a third step of acquiring the display range of the OSD and verifying whether the display range of the OSD is within the video displayable range, and the third step If it is within the video displayable range in the process, the fourth process for generating an OSD menu image , the projection image corrected for trapezoidal distortion by the scaler, and the OSD menu generated in the fourth process and a fifth step of synthesizing the image, wherein if not within the video displayable range in the third step, the image displayable Until within the range to delete more OSD menu item from OSD in accordance with the menu display priority to generate the OSD menu picture, if all deleted to provide an OSD display method characterized by not displaying the OSD.

  According to such a method, an OSD display method having the effect of (3) can be achieved.

  According to the present invention, it is possible to provide a projection display device and an OSD display method capable of correcting distortion of a projected image with respect to trapezoidal distortion and capable of displaying without missing from the screen even when the distortion of OSD cannot be corrected.

  Embodiments of a projection display device and an OSD display method of the present invention will be described below in detail with reference to the drawings.

[First embodiment]
(Configuration of projection display device)
FIG. 1 is a schematic configuration diagram of a projection display device as an electronic apparatus according to the first embodiment of the invention.

  The projection display apparatus 100 includes a main body 10 mainly composed of electronic components that mainly perform image processing and sound processing, and an optical system including a lens group, and an operation switch 11 that performs OSD operation and input switching The zoom lever 12 adjusts the enlargement / reduction of the image projected on the screen and adjusts the focus, and the projection lens 13 projects the image toward the screen by changing the arrangement of the lens groups in conjunction with the zoom lever 12.

  FIG. 2 is a schematic configuration diagram of the projection display apparatus according to the first embodiment of the present invention.

  The projection display apparatus 100 converts an input analog video information into digital, an A / D conversion unit 1, converts a signal from the A / D conversion unit 1 into a desired vertical and horizontal scale, and simultaneously converts a trapezoidal distortion. The scaler 2 to be corrected, the OSD menu generation unit 3 that generates a desired OSD menu, the synthesis unit 4 that combines the outputs of the scaler 2 and the OSD menu generation unit 3, and the output of the synthesis unit 4 are converted, and the projection lens 13 A projection unit 5 that outputs a light source image that can be projected further, and a scaler 2, an OSD menu generation unit 3, a synthesis unit 4, and a control unit 6 that controls the projection unit 5 and can be operated by an operation switch 11.

(Operation of projection display device)
The operation of the projection display device according to the first embodiment of the present invention will be described below with reference to FIGS.

  FIG. 3A is a projection image of the projection display device according to the first embodiment of the present invention. FIG. 3B is a projection image that has been subjected to OSD correction.

  FIG. 4 is a flowchart showing an OSD correction procedure of the projection display apparatus according to the first embodiment of the present invention.

  First, as shown in FIG. 3A, the control unit 6 acquires the coordinates of the reference point 52a on the projection image 50a for the OSD display range 51a displayed on the projection image 50a before correction (s1). ). Next, as shown in FIG. 3B, the coordinates of the reference point 52b moved by distortion correction of the projection image 50b are acquired (s2). Next, an offset value is calculated by taking the difference between 52a and 52b acquired in s1 and s2 (s3). Next, the OSD display range 51a is moved to the OSD display range 51b based on the offset value obtained in s3 (s4).

  Here, the projected image 50a and the projected image 50b indicate what is displayed when an image is projected from the projection lens 13 in a state where a screen (not shown) is correctly installed.

(Effects of the first embodiment)
According to the above-described embodiment, the OSD can be displayed at an appropriate position even when the distortion cannot be corrected with respect to the OSD due to an apparatus configuration problem such as a one-scaler of the scaler, and the OSD can be displayed outside the projected image 50b. It will not be.

[Second Embodiment]
FIG. 5A is a projection image of the projection display device according to the second embodiment of the present invention. FIG. 5B shows a projection image that has been subjected to OSD correction.
In the following description, parts having the same configuration and function as those of the first embodiment are denoted by common reference numerals.

  FIG. 6 is a flowchart showing a procedure of OSD correction of the projection display apparatus according to the second embodiment of the present invention.

When there is an OSD display range 53a in which menus are arranged in the vertical direction on the projection image 50a as shown in FIG. 5A, when the projection image 50b is formed after distortion correction as shown in FIG. 5B. The OSD display range 53a is missing from the display range. First, the control unit 6 acquires a video displayable range of the projection image 50b (s11). Next, in accordance with the menu display priority registered in advance in the OSD menu generation unit 3, a deletion flag is set for a menu having a low priority. The menu with the deletion flag is deleted, and the display range of the OSD display range 53b is calculated and acquired (s12). Next, it is verified whether the display range of the OSD display range 53b acquired in s12 is within the displayable range of the projection image 50b (s13). Next, when the OSD display range 53b is within the displayable range of the projection image 50b (s13y), the menu is displayed only with items for which no deletion flag is set (s14). When the OSD display range 53b is not within the displayable range of the projection image 50b (s13n),
A new deletion flag is set for a menu with a low menu display priority (s15). Next, when the deletion flag is set in all menus by the process of s15 (s16y), the process is terminated without displaying the menu. If the deletion flag is not set for all menus in the process of s15 (s16n), the process returns to s12 and the process is performed.

  FIG. 7 is a schematic diagram showing an OSD display form of the projection display apparatus according to the second embodiment of the present invention.

  FIG. 7A shows an OSD as a message 55a arranged in the center with respect to the projection image 50a, and FIG. 7B shows an OSD as an icon 55b arranged in the upper right with respect to the projection image 50a. Is an OSD as a menu 55c arranged to extend vertically from the upper right with respect to the projected image 50a and horizontally from each menu, and (d) is a volume 55d arranged below the projected image 50a. As an OSD.

  When the trapezoidal correction is performed by contracting the lower part of the projection image 50a as shown in FIG. 5B, the projection based on the trapezoidal correction is substantially performed for the OSD positioned above like the icon 55b shown in FIG. Since it can be displayed regardless of the displayable range of the image 50b, OSD correction is not performed. In contrast to FIG. 5B, when the upper portion of the projection image 50a is contracted, the OSD correction is not performed for the OSD positioned below like the volume 55d shown in FIG. 7D.

(Effect of the second embodiment)
According to the above-described embodiment, even when distortion correction cannot be performed on the OSD, the OSD can be displayed at an appropriate position, and the OSD is not displayed outside the projected image 50b.

  Further, it is possible to improve the processing speed by not performing the OSD correction on the OSD not affected by the trapezoid correction.

  In this embodiment, the menu items arranged in the vertical direction are described. However, the same operation is performed for the menu items arranged in the horizontal direction.

It is a schematic block diagram of the projection type display apparatus as an electronic device which concerns on the 1st Embodiment of this invention. It is a schematic block diagram of the projection type display apparatus regarding the 1st Embodiment of this invention. (A) is a projection image of the projection type display apparatus regarding the 1st Embodiment of this invention. (B) is a projection image subjected to OSD correction. It is a flowchart which shows the procedure of the OSD correction | amendment of the projection type display apparatus regarding the 1st Embodiment of this invention. (A) is a projection image of the projection type display apparatus regarding the 2nd Embodiment of this invention. (B) is a projection image subjected to OSD correction. It is a flowchart which shows the procedure of the OSD correction | amendment of the projection type display apparatus regarding the 2nd Embodiment of this invention. It is the schematic which shows the OSD display form of the projection type display apparatus regarding the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Conversion part, 2 ... Scaler, 3 ... Menu generation part, 4 ... Composition part, 5 ... Projection part, 6 ... Control part, 10 ... Main body, 11 ... Operation switch, 12 ... Zoom lever, 13 ... Projection lens, 50a Projected image 50b Projected image 51a Display range 51b Display range 52a Reference point 52b Reference point 53a Display range 53b Display range 55a Message 55b Icon 55c Menu 55d ... volume, 100 ... projection type display device

Claims (6)

A scaler that converts the projected image at a desired aspect ratio and corrects keystone distortion;
From the difference between the OSD (on-Screen Display) display and the reference point coordinates before correction is the position, the is OSD display position after keystone distortion correction corrected reference point coordinate in the projection image before keystone distortion correction of the scaler obtains a reference point offset value, based on the reference point offset value, as the correction reference point coordinate coordinates after movement before the reference point coordinate is moved, the OSD menu generating section that generates an OSD menu image,
A projection-type display device comprising: a combining unit that combines the projection image whose trapezoidal distortion is corrected by the scaler and the OSD menu image generated by the OSD menu generation unit . A scaler that converts the projected image at a desired aspect ratio and corrects keystone distortion;
Gets the displayable range of the projection image after the keystone distortion correction that by the scaler, sequentially deleted in accordance with pre-registered menu priority OSD menu items as OSD display range is within the display range of the projection image An OSD menu generator for generating an OSD menu image ;
A projection-type display device comprising: a combining unit that combines the projection image whose trapezoidal distortion is corrected by the scaler and the OSD menu image generated by the OSD menu generation unit . The scaler projection display device according to claim 1 or 2, characterized in that it is arranged in front of the OSD menu generating unit. The projection display device according to claim 1, wherein the OSD menu generation unit does not perform a movement process when an OSD display position is not affected by the trapezoidal distortion correction. A first step of acquiring the pre-correction reference point coordinates of the display position of the OSD displayed in the projection image;
A second step of acquiring corrected reference point coordinates moved based on the trapezoidal distortion correction by the scaler;
A third step of obtaining an offset value by taking a difference between the reference point coordinates before correction and the reference point coordinates after correction;
And based on the said offset value, as the correction reference point coordinate coordinates after movement before moving the reference point coordinates, a fourth step of generating an OSD menu image,
An OSD display method comprising: a fifth step of combining the projection image whose trapezoidal distortion has been corrected by the scaler and the OSD menu image generated in the fourth step . A first step of acquiring a video displayable range from a projection image after correcting the keystone distortion by the scaler;
A second step of deleting the OSD menu item from the OSD according to the menu display priority stored in the OSD menu generation unit;
Obtaining a display range of the OSD and verifying whether the display range of the OSD is within the video displayable range;
A fourth process for generating an OSD menu image if the third process is within the video displayable range ;
A fifth step of combining the projection image corrected for trapezoidal distortion by the scaler and the OSD menu image generated in the fourth step ;
If it is not within the video displayable range in the third step, an OSD menu image is generated by further deleting the OSD menu item from the OSD according to the menu display priority until it falls within the video displayable range; An OSD display method characterized by not displaying an OSD when all of them are deleted.

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