JPH11338449A - Enlarged display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a frame for indicating an enlarging area from being overlapped with a sub-image plane for displaying an enlarged image. SOLUTION: A sub-image plane position setting part 2 is set by a frame position setting part 1, and determines the presence of overlapping of a frame and a sub-image plane based on a frame position for indicating a position of an enlarging image and a sub-image plane position, and the sub-image plane position is changed when overlapped. A composing part 3 composes a video signal enlarged by an enlarging part 102 according to the frame position in the sub-image plane position, to be supplied to an LCD drive part 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an enlarged display device for enlarging and displaying a part of an image based on an image signal.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for enlarging and displaying a part of an image based on an image signal such as an RGB signal from a personal computer or the like, an apparatus disclosed in, for example, Japanese Patent Laid-Open No. Hei 5-94162 is known. Was.

As shown in FIG. 18, for example, some of these devices are provided with an input processing unit 101 for performing a predetermined process on an input RGB signal to convert the input signal, and an input process. Expanding section 102 for selecting a partial area from the processed signal and enlarging the area at a specified magnification, and synthesizing section 1 for inserting the expanded signal into a predetermined area of the input-processed signal
03, an LCD driving unit 104 for converting the synthesized signal into a signal for driving an LCD (liquid crystal), a lamp 105,
An LCD panel 106, a projection lens 107, and a screen 108 are provided.

FIG. 19 shows an example of a screen displayed in this manner. As shown in the figure, the displayed screen 109 is provided with a frame 110 indicating an image to be enlarged and a child screen 111 for displaying the enlarged image.

[0005] A user using this apparatus operates a remote control or the like while viewing the displayed screen 109, and operates the frame 11 by using a remote controller.
The user moves the display position of the “0” in the screen 109 and selects an area to be enlarged and an enlargement magnification. When the enlargement area is selected in this manner, the enlargement unit 102 enlarges the portion corresponding to the enlargement area of the signal on which the input processing unit 101 has performed the predetermined processing (clamping, synchronization separation, and the like) at the selected magnification. Then, the data is supplied to the synthesizing unit 103.

The synthesizing unit 103 synthesizes the enlarged signal at a predetermined position of the signal from the input processing unit 101 and supplies the synthesized signal to the LCD driving unit 104. The LCD driver 104 converts the supplied signal into a signal for driving the LCD panel 106,
The D panel 106 is driven. The LCD panel 106 modulates the light from the lamp 105, and the projection lens 107 projects the modulated light on a screen 108 in an enlarged manner. As a result, a screen 109 having a child screen 111 on which an enlarged image is displayed is displayed on the screen 108.

[0007]

However, in the conventional apparatus, if the frame 110 indicating the enlarged area is moved, the frame may overlap with the child screen 111 for displaying the enlarged image. There is a problem that it is difficult to associate the screen 111.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an enlarged display device which does not overlap a small screen for displaying an enlarged image even when a frame indicating an area to be enlarged is moved. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, an enlarged display device according to a first aspect of the present invention includes an instruction input unit for inputting an instruction from a user and an instruction input unit for inputting the instruction. In accordance with the instruction, an enlargement area setting means for setting an enlargement area in the input video signal supplied from the outside, an enlargement means for enlarging the enlargement area set by the enlargement area setting means for the input video signal, Frame generating means for generating a video signal of a frame to be shown, child screen position setting means for setting a display position of a child screen for displaying an image based on the video signal enlarged by the enlarging means, and a frame generated by the frame generating means A synthesizing unit for synthesizing the video signal and the video signal of the enlarged area enlarged by the enlarging unit with the enlarged area in the input video signal and the display position of the child screen, respectively. Display means for displaying a video signal,
A sub-screen position changing means for changing the position of the sub-screen according to the enlarged area and the display position of the sub-screen is provided.

In the enlarged display device according to a second aspect of the present invention, when the enlarged area and the small screen overlap with each other, the small screen position change means changes the small screen position according to the display position of the enlarged area and the small screen. The position is changed to a position that does not overlap with the enlarged area.

Further, an enlarged display device according to a third aspect of the present invention is characterized in that at least the enlarged area setting means and the small screen position setting means are constituted by a single arithmetic means.

Further, the enlarged display device according to claim 4 of the present invention has an interrupt processing means for executing a plurality of processes in parallel according to an interrupt priority, and controls the entire enlarged display device by executing a predetermined process. , And at least the enlargement area setting means and the child screen position setting means are realized by a process having a lower interrupt priority than a process for controlling the entire enlargement display device.

In the enlarged display device according to a fifth aspect of the present invention, the sub-screen position setting means divides the display area of the video signal into a plurality of areas, obtains an area to which the enlarged area belongs, and to which the sub-screen belongs. When the area to which the enlarged area belongs and the area to which the child screen belongs are the same, the child screen position is
It is characterized by a position belonging to a region other than the region to which the enlarged region belongs.

According to a sixth aspect of the present invention, there is provided an enlarged display device, wherein: an instruction input means for inputting an instruction from a user; and an input video signal supplied from the outside in response to the instruction input by the instruction input means. Enlargement area setting means for setting an enlargement area inside, enlargement means for enlarging an input video signal of the enlargement area set by the enlargement area setting means, and frame generation means for generating a video signal of a frame indicating the enlargement area, A small-screen position setting means for setting a display position of a small screen for displaying an image based on the video signal enlarged by the enlargement means; and a video signal of the frame generated by the frame generation means and an enlarged area enlarged by the enlargement means. Synthesizing means for synthesizing the video signal with the enlarged area in the input video signal and the display position of the child screen, display means for displaying the video signal synthesized by the synthesizing means, Characterized in that it comprises a sub screen display control means for controlling whether or not to display a sub-screen in response to input from the display position or the instruction input means of the child screen and.

According to a seventh aspect of the present invention, in the enlarged display device, the small screen display control means displays the small screen when the enlarged area and the display position of the small screen do not overlap with each other. When the display positions of the screens overlap with each other, the synthesizing unit is controlled so that the child screen is not displayed while an instruction for designating the enlarged area is input from the user to the instruction input unit.

An enlarged display device according to claim 8 of the present invention is characterized in that at least the enlarged area setting means and the small screen position setting means are constituted by a single arithmetic means.

Further, the enlarged display device according to the ninth aspect of the present invention has an interrupt processing means for executing a plurality of processes in parallel according to an interrupt priority, and controls the entire enlarged display device by executing a predetermined process. , And at least the enlargement area setting means and the child screen position setting means are realized by a process having a lower interrupt priority than a process for controlling the entire enlargement display device.

Further, in the enlarged display device according to claim 10 of the present invention, the small-screen display control means, while the instruction for designating the enlarged area is input from the user to the instruction input means,
It is characterized in that the combining means is controlled so as not to display the child screen.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a diagram illustrating a configuration of an enlarged display device according to a first embodiment of the present invention.

As shown in FIG. 1, the enlarged display device performs a predetermined process on an input video signal (for example, an RGB signal) to convert the input signal into an input signal.
A frame position setting unit 1 for setting a position of a frame in accordance with a frame position instruction from a user or the like; a sub-screen position setting unit 2 for changing a sub-screen position when the sub-screen position overlaps the frame position; And a synthesizing unit 3 for selecting a partial area from the signal subjected to the input processing and enlarging the selected area by a specified magnification, and inserting the enlarged video signal into a predetermined area of the signal subjected to the input processing. LCD (Liquid Cristal D)
LCD drive unit 104 for converting a signal to drive an isplay (liquid crystal display), and a light source 105 such as a lamp
, An LCD panel 106, a projection lens 107, and a screen 108. In FIG. 1,
Components that are the same as or correspond to those in the conventional example shown in FIG. 18 are given the same reference numerals.

Here, although an example is shown in which the apparatus is configured as hardware, the frame position setting section 1, the sub-screen position setting section 2, the synthesizing section 3, the enlargement section 102, and the like include, for example, a processor or a processor for controlling the entire apparatus. The equivalent function may be configured by a control program (software) such as a microcomputer.

The means for displaying an image includes a lamp 10.
5. The projection (projection) type liquid crystal projector including the LCD panel 106, the projection lens 107, and the screen 108 may not be used.
All other display devices such as an RT display can be used.

FIGS. 2A and 2B show an example of a screen displayed on the screen 108. As shown in these figures, the displayed screen 109 is provided with a frame 110 indicating an area of an image to be enlarged and a child screen 111 for displaying the enlarged image.

Hereinafter, the operation of the enlarged display device configured as described above will be described. When a video signal is supplied from the outside, the input processing unit 101 performs predetermined processing (for example, clamping and synchronization separation) and supplies the processed signal to the synthesizing unit 3 and the enlarging unit 102. Further, the frame position setting unit 1 sets the position of the frame in accordance with a frame position instruction from a user or the like, and supplies the set frame position to the enlargement unit 102 and the child screen position setting unit 2. This frame position is represented, for example, by the coordinates of two diagonal points.
In the initial state, for example, the initial frame position set in the frame position setting unit 1 is set.

When the video signal and the frame position are supplied, the enlargement unit 102 extracts a portion corresponding to the frame position of the video signal from the input processing unit 101, enlarges the portion at the set enlargement ratio, and combines this with the synthesis unit. Supply 3 This enlargement ratio may be determined from the size of the frame of the designated enlargement region, or may be arbitrarily selected according to another input from the user. In this case, the size of the child screen is made variable according to the enlargement ratio, or the display position in the child screen is obtained,
Alternatively, it is necessary to perform processing such that the enlargement rate does not exceed the size of the sub-screen, and when the size exceeds the sub-screen size, the image displayed on the sub-screen is set to a predetermined position in the frame.

The synthesizing unit 3 synthesizes the enlarged video signal from the enlarging unit 102 and the video signal of the frame with the position of the child screen of the video signal from the input processing unit 101 and supplies it to the LCD driving unit 104. The LCD driving unit 104 converts the signal into a signal for driving the LCD panel 106 and drives the LCD panel 106. LC
The D panel 106 modulates light from the lamp 105, and the projection lens 107 enlarges and projects the light modulated by the LCD panel 106 on a screen 108. As a result, on the screen 109 on the screen 108, a sub-screen 111 including the image of the frame at the initial frame position and the enlarged image in the frame is displayed. The user looks at this screen and, if the position of the frame is not satisfactory, instructs movement of the frame by operating a remote controller or the like.

When an instruction is input from the user, the frame position setting unit 1 changes the frame position according to the input. When the frame position is changed, the synthesizing unit 3 synthesizes the video signal of the frame with the new frame position, and the enlargement unit 102 forms an enlarged video signal corresponding to the new frame position. As a result, a frame is displayed at a new frame position on the screen, and an enlarged image of this frame position is displayed on the sub-screen.

By the way, if the position of the child screen is fixed,
Depending on the position of the frame indicating the enlarged area, the frame may overlap the child screen. For this reason, in this enlarged display device, the sub-screen position setting unit 2 detects whether or not the frame overlaps the sub-screen, and when the frame and the sub-screen overlap as shown in FIG. As shown in FIG. 2 (B), the child screen position is moved so as not to overlap the frame, and this child screen position is notified to the synthesizing unit 3. If the frame position and the child screen position do not overlap, the child screen position is changed. The synthesizing unit 3 is notified.

The determination as to whether or not the frame and the sub-screen overlap with each other is made, for example, by comparing the coordinates of all the pixels inside the frame with the coordinates of the outer frame of the sub-screen, However, if the pixel is inside the outer frame of the child screen, it is determined that they overlap, and if all the pixels are not inside the outer frame of the child screen, it is determined that they do not overlap. Alternatively, the determination may be made by calculation from the coordinates of the outer edge (or vertex) of the frame and the coordinates of the outer edge (or vertex) of the child screen.

For the movement of the position of the child screen, specifically, for example, a plurality of positions (for example, positions of four corners of the screen, etc.) are set in advance as positions for moving the child screen, and the position of the frame is determined. When the positions of the child screens overlap, the selection is made by selecting a position of the child screen that does not overlap with the position of the frame from among a plurality of candidates.

In the enlarged display device according to this embodiment,
When the frame overlaps the child screen, the child screen position setting unit 2 detects this and moves the child screen, so that it is possible to prevent the frame indicating the enlarged area from being hidden by the child screen. .

Embodiment 2 FIG. FIG. 3 is a diagram illustrating a configuration of an enlarged display device according to a second embodiment of the present invention. As shown in the figure, this enlarged display device sets a frame position according to a frame position instruction from a user or the like instead of the frame position setting unit 1 and the sub-screen position setting unit 2 in FIG. Is provided with a frame / child screen setting unit 4 for changing the setting of the position of the child screen when the child frame area overlaps with the child screen area. The position is set. Other components function similarly to the above-described first embodiment.

The frame / small screen setting unit 4 sets the position of the frame in accordance with a frame position instruction from a user or the like, and enlarges the frame position.
02, which is supplied to the synthesis unit 3. Further, the frame / sub-screen setting unit 4 compares the set frame position with the position of the sub-screen at that time, and when these overlap, changes the position of the sub-screen and combines the changed sub-screen position with the combining unit 3. To supply.

The enlarging unit 102 applies a frame / frame to the video signal from the input processing unit 101 in the same manner as in the first embodiment.
The portion corresponding to the frame position set by the child screen setting unit 4 is enlarged and supplied to the synthesizing unit 3. The synthesizing unit 3 forms the video signal of the frame, and synthesizes the video signal with the video signal from the input processing unit 101 together with the enlarged video.

Therefore, in the enlarged display device according to the second embodiment, similarly to the above-described first embodiment, a frame indicating an enlarged area and an enlarged image can be displayed on the screen of the screen 108. If the frame overlaps the child screen, the position of the child screen can be automatically changed.

Further, in this enlarged display device, the frame position setting unit 1 for performing the calculation for obtaining the coordinates of the frame position from the above-mentioned frame position instruction and the enlargement ratio is compared with the frame position and the position of the child screen, and the position of the child screen is determined. Sub-screen position setting part 2 to select whether to move
By providing a single frame / small screen setting unit 4 in place of the above, it is possible to determine whether the information, which is calculated independently, for example, the frame, the position of the small screen, etc., and whether the frame and the small screen overlap. The information to be shown can be obtained continuously by a common arithmetic unit, and the circuit scale can be reduced as compared with the case where the information is obtained independently.

Embodiment 3 FIG. 4 is a diagram illustrating a configuration of an enlarged display device according to a third embodiment of the present invention. As shown in the figure, in this enlarged display device, FIG.
The inside frame / small screen setting unit 4 is realized as a function of a controller 6 including a microcomputer or the like for controlling the entire enlarged display device such as input of an instruction from a user or the like.

The controller 6 executes, in parallel with processing such as control of the entire enlarged display device, setting of a frame position in accordance with a frame position instruction, processing of changing the setting of a child screen position, and the like. .

More specifically, the execution of each process is managed by an interrupt. For example, the priority of the interrupt of the process of setting the frame position according to the frame position instruction and changing the setting of the child screen position is different from that of the interrupt. Is lower than the control processing of the entire apparatus. By doing so, the processing of the entire apparatus with a high priority is preferentially executed, and the processing of setting the frame position according to the frame position instruction and changing the setting of the child screen position is performed during the idle time of this processing. Can be done.

In the enlarged display device according to the third embodiment, a frame position is set in accordance with a frame position instruction from a user or the like as a function of the controller 6 for controlling the entire enlarged display device, and the frame overlaps the child screen area. In this case, by realizing the frame / small screen setting unit 4 for changing the setting of the position of the small screen, it is possible to prevent the frame indicating the enlarged area from being hidden by the small screen without adding a special circuit. be able to.

Embodiment 4 FIG. FIG. 5 is a diagram illustrating a configuration of an enlarged display device according to a fourth embodiment of the present invention. In the above-described first to third embodiments, when a frame indicating an image to be enlarged overlaps a child screen displaying the enlarged image, the child screen is moved to another position. In contrast,
In the enlarged display device according to this embodiment, the screen is divided into a plurality of regions, and the display position of the frame and the sub-screen is controlled so that the frame and the sub-screen are displayed in different regions. Even if such control is performed, effects similar to those of the above-described first to third embodiments can be obtained.

This enlarged display device, as shown in FIG.
Instead of the frame position setting unit 1 and the child screen position setting unit 2 in FIG. 1 described above, a frame position setting unit 8 that sets a frame position according to a frame position instruction and determines an area with a frame, and an area where the frame exists A sub-screen position setting unit 9 for setting the position of the sub-screen in an area different from the sub-screen.

Hereinafter, the operation of the enlarged display device configured as described above will be described. As shown in FIG. 6A, the frame position setting unit 8 and the child screen position setting unit 9
The area is divided into two areas A1, A2, A3, and A4, and the display position of the frame and the sub-screen 111 is managed. The number of screen divisions is
The number is not limited to four, and may be any number as long as it is plural.
The shape of each region is not limited to a rectangle, but may be any shape.

The frame position setting unit 8 sets the position of the frame in accordance with a frame position instruction from a user or the like, and enlarges the frame position.
And to the synthesis unit 3. Further, the frame position setting unit 8
An area where the frame exists (for example, A2) is obtained and supplied to the small screen area setting unit 9.

The sub-screen area setting section 9 determines the area where the sub-screen currently exists and the area where the frame from the frame position setting section 8 exists.
For example, management is performed using a table as shown in FIG. 7A, and it is detected whether the area where the frame exists is the same as the area where the child screen exists. Alternatively, the detection may be performed by simply holding an area where the child screen exists in a register or the like, and comparing the area with the area where the frame from the frame position setting unit 8 exists.

For example, as shown in FIG.
When the frame 110 and the child screen 111 are present in the second table, the contents of the table are as shown in FIG. 7A, and the child screen area setting unit 9 sets the contents as shown in FIG. The area for displaying the child screen is changed to another area A4, and this is
To supply. The synthesizing unit 3 determines the area A in the video signal from the input processing unit 101 based on the supplied small screen display area.
The image signal enlarged by the enlargement unit 102 at the position corresponding to the position No. 4 is synthesized. Thus, as shown in FIG. 6B, the child screen is displayed in another area A4, the frame and the child screen are displayed in different areas, and it is possible to prevent the frame and the child screen from overlapping.

In the enlarged display device according to the fourth embodiment, the screen is divided into a plurality of areas as described above, and it is detected whether or not the area where the frame exists and the area where the child screen exists are detected. If they are the same, by changing the position of the child screen, it is possible to prevent the frame from overlapping the child screen, as in the first to third embodiments. Further, in this enlarged display device, the frame position is changed based on the comparison result of the region where the frame and the sub-screen are present. Therefore, as in the first to third embodiments, the coordinates of the frame position and the sub-screen position It is not necessary to perform the calculation or the like, and the addition of the calculation can be reduced.
This can contribute to a reduction in the circuit scale and the like.

Embodiment 5 FIG. FIG. 8 is a diagram showing a configuration of an enlarged display device according to a fifth embodiment of the present invention. As shown in the figure, this enlarged display device sets a frame position according to a frame position instruction from a user or the like instead of the frame position setting unit 8 and the sub-screen position setting unit 9 in FIG. And a sub-screen setting unit 11 for changing the sub-screen area when the sub-screen is in the same area as the sub-screen. Is set. Other components function in the same manner as in the above-described fourth embodiment.

The frame / small screen setting section 11 divides the screen 109 into four areas A 1, A 2, as in the fourth embodiment.
The frame is divided into A3 and A4, and the display position of the frame and the child screen 111 is managed.

The frame / small screen setting unit 11 sets the position of the frame in accordance with a frame position instruction from a user or the like, and supplies the position of the frame to the enlargement unit 102 and the synthesizing unit 3. Further, the frame / small screen setting unit 11 obtains an area where the frame exists, compares the area with the area where the child screen currently exists, and determines that the area where the frame exists and the area where the child screen exists is the same. The screen is set in another area and supplied to the synthesizing unit 3.

As a result, in the enlarged display device according to the fifth embodiment, the frame and the sub-screen are displayed in different areas as in the above-described fourth embodiment, and the frame and the sub-screen overlap. Can be prevented. Further, in this enlarged display device, the single frame / small screen setting unit 11 is provided instead of the frame position setting unit 8 and the small screen position setting unit 9 so that the frames and the small screens which are independently obtained are provided. It is possible to commonly obtain information such as a region to be obtained, and it is possible to reduce the circuit scale as compared with a case where information is obtained independently.

Embodiment 6 FIG. FIG. 9 is a diagram illustrating a configuration of an enlarged display device according to a sixth embodiment of the present invention. As shown in the figure, in this enlarged display device, FIG.
The inside frame / small screen setting unit 11 is realized as a function of a controller 13 including a microcomputer or the like that controls the entire enlarged display device such as input of an instruction from a user or the like.

The controller 13 executes processing for setting the frame position in accordance with the frame position instruction and processing for changing the area in which the child screen is displayed, in parallel with the processing such as control of the entire enlarged display device. I have.

Specifically, the execution of each process is performed in the third
Similarly to the embodiment, the priority of the interruption of the process of setting the frame position according to the frame position instruction and changing the area where the child screen is displayed is controlled by the interruption, for example, as in the first embodiment. It is lower than the control process. In this way, the processing of the entire apparatus with high priority is preferentially executed, and the setting of the frame position according to the frame position instruction during the idle time of this processing and the processing of changing the area where the child screen is displayed are performed. Can be executed.

In the enlarged display device according to the sixth embodiment, as a function of the controller 13 for controlling the entire enlarged display device, a frame position is set according to a frame position instruction from a user or the like, and an area where a frame exists and a child area are set. By detecting whether the area where the screen exists is the same or not, and when the area is the same, by realizing the frame / small screen setting unit 11 for changing the sub-screen position,
Without adding a special circuit, it is possible to prevent the frame indicating the enlarged area from being hidden by the child screen.

Embodiment 7 FIG. In the above-described first to sixth embodiments, when the frame and the sub-screen overlap, or when the region where the frame and the sub-screen are displayed is the same, the display position or the display area of the sub-screen is changed, so that the frame and the sub-screen are changed. Although the child screen is prevented from overlapping, the enlarged display device according to the seventh embodiment does not display the child screen when the frame and the child screen overlap, so that the frame and the child screen overlap. Has been prevented.

As shown in FIG. 10, this enlarged display device uses a frame position based on a frame position instruction from a user or the like instead of the frame position setting unit 1 and the sub-screen position setting unit 2 in FIG. A frame position setting unit 14 for setting the
A synthesizing unit 15 that inserts an enlarged video signal into a predetermined area of the signal that has been subjected to the input processing, and synthesizes such that the child screen is not displayed while the frame position is specified when the frame and the child screen overlap. A sub-screen control unit 16 for controlling the unit 15 is provided.

Although the example shown here is configured as hardware, the frame position setting unit 14, the synthesizing unit 15,
The sub-screen position setting unit 16, the enlargement unit 102, and the like may have equivalent functions by a control program (software) such as a processor or a microcomputer that controls the entire apparatus.

The means for displaying an image is a lamp 10
5. The projection (projection) type liquid crystal projector including the LCD panel 106, the projection lens 107, and the screen 108 may not be used.
All other display devices such as an RT display can be used.

The frame position setting unit 14 sets the position of the frame in accordance with a frame position instruction from a user or the like, and enlarges the frame position.
2. It is supplied to the synthesizing unit 15 and the child screen control unit 16. The sub-screen control unit 16 supplies the display position of the sub-screen to the synthesizing unit 15 when the frame and the sub-screen do not overlap, for example, as shown in FIG. To instruct. Depending on a frame position instruction from a user or the like, for example, FIG.
As shown in FIG. 1A, the frame position may overlap with the child screen. In such a case, while the sub-screen control unit 16 is instructed by the user or the like to position the frame, that is, while the user or the like selects an image to be enlarged, as shown in FIG. The synthesizing unit 15 is controlled so as not to display.

In order not to display the child screen, for example, when the display position of the child screen is supplied, the synthesizing unit 15 synthesizes the enlarged image signal from the enlargement unit 102 with the display position, and further sets the child screen position. When not supplied, or when a predetermined value that cannot be a normal small picture position is reached, the composition of the video signal from the enlargement unit 102 is not performed. Also, the sub-screen control unit 16 supplies the sub-screen position to the synthesizing unit 15 when the frame and the sub-screen do not overlap,
When the frame and the sub-screen overlap, the sub-screen position is determined by the synthesizing unit 15.
Is supplied to the synthesizing unit 15 as a sub-screen position that is not supplied to the synthesizing unit or that cannot be a normal sub-screen position.

The detection of the overlap between the frame and the sub-screen by the sub-screen control unit 16 is performed by, for example, determining the coordinates of all pixels inside the frame and the outer frame of the sub-screen in the same manner as in the first embodiment. Compared with the coordinates, it is determined that some pixels are overlapped if they are inside the outer frame of the child screen, and that all pixels are not overlapped if they are not inside the outer frame of the child screen. Alternatively, the determination may be made by calculation from the coordinates of the outer edge (or vertex) of the frame and the coordinates of the outer edge (or vertex) of the child screen.

As described above, in the enlarged display device according to the seventh embodiment, when the frame overlaps with the child screen, the child screen control unit 16 detects this, and while the frame position is instructed,
Since the control is performed so as not to display the small screen, it is possible to prevent the frame indicating the image to be enlarged on the small screen from being hidden.

Embodiment 8 FIG. FIG. 12 is a diagram illustrating a configuration of an enlarged display device according to an eighth embodiment of the present invention.
As shown in the figure, this enlarged display device is the same as that shown in FIG.
In place of the frame position setting unit 14 and the sub-screen control unit 16 during zero, the frame position is set according to a frame position instruction from a user or the like, and when the frame overlaps the sub-screen area, the combining unit does not display the sub-screen. 15 is provided, and a single frame / sub-screen setting unit 17 is used to set the frame position and control the display of the sub-screen. Other components function in the same manner as in the above-described seventh embodiment.

The frame / small screen setting section 17 sets the position of the frame in accordance with the frame position instruction from the user or the like. When the frame and the child screen overlap, the child screen is not displayed while the frame position is instructed. The synthesizing unit 15 is controlled as described above. The control of the synthesizing unit 15 is the same as in the above-described seventh embodiment.

Thus, in the enlarged display device according to the eighth embodiment, similarly to the above-described seventh embodiment, when the frame and the sub-screen overlap, while the frame position is instructed by the user or the like, The child screen can not be displayed. Therefore, it is possible to prevent the frame and the child screen from overlapping while the frame position is specified.

In this enlarged display device, a single frame / frame is used instead of the frame position setting unit 14 for setting the frame position and the child screen control unit 16 for judging whether or not the frame and the child screen overlap.
By providing the sub-screen setting unit 17, the information that has been independently calculated and obtained can be continuously obtained by the common computing unit, and the circuit scale can be reduced as compared with the case where it is obtained independently. Can be reduced.

Embodiment 9 FIG. 13 is a diagram illustrating a configuration of an enlarged display device according to a ninth embodiment of the present invention.
As shown in the figure, in this enlarged display device, the frame / small screen setting unit 17 shown in FIG. 12 is controlled by a controller 18 such as a microcomputer which controls the entire enlarged display device such as input of an instruction from a user or the like. Function.

The controller 18 executes processing such as setting of the frame position according to the frame position instruction and control of the display of the sub-screen in parallel with the processing such as control of the entire enlarged display device.

Specifically, similarly to the above-described third embodiment, execution of each process is managed by interruption, for example, setting of a frame position according to a frame position instruction, display control of a sub-screen, and the like. The priority of the interrupt of the process is lower than that of the control process of the other devices as a whole. By doing so, the processing of the entire apparatus with a high priority is preferentially executed, and the processing of setting the frame position according to the frame position instruction and changing the setting of the child screen position is performed during the idle time of this processing. Can be done.

In the enlarged display device according to the ninth embodiment, a frame position is set in accordance with a frame position instruction from a user or the like as a function of a controller 18 for controlling the entire enlarged display device, and the frame overlaps the child screen area. In this case, a frame / child screen setting unit that controls the synthesizing unit 15 so that the child screen is not displayed while the frame position is specified by the user or the like is realized without adding a special circuit. While there is
It is possible to prevent the frame indicating the enlarged area from being hidden by the child screen.

Embodiment 10 FIG. In the above-described seventh to ninth embodiments, when the frame and the child screen overlap, the child screen is not displayed while the frame position is instructed, thereby preventing the frame and the child screen from overlapping. In the tenth embodiment, the frame position is set according to the frame position, and when a frame position is designated by a user or the like and a video to be enlarged based on the frame position is selected, the sub-screen is not displayed. By doing so, it is possible to prevent the frame and the child screen from overlapping when there is a frame position instruction.

As shown in FIG. 14, this enlarged display device changes the frame position based on a frame position instruction from a user or the like instead of the frame position setting unit 14 and the child screen control unit 16 in FIG. A frame position setting unit 19 to be set and a child screen control unit 20 for controlling the synthesizing unit 15 so as not to display the child screen when there is a frame position instruction from a user or the like are provided.

The frame position setting section 19 sets the position of the frame in accordance with a frame position instruction from a user or the like,
2. Supply to the synthesis unit 15. The sub-screen control unit 20 displays the sub-screen as shown in FIG. 15A while there is a frame position instruction, and displays the sub-screen as shown in FIG. The synthesizing unit 15 is controlled as described above. The display control of the child screen is performed in the same manner as in the above-described seventh embodiment. Thus, when there is no frame position instruction, the synthesizing unit 15 synthesizes the enlarged video signal from the enlargement unit 102 with the video signal from the input processing unit 101. It does not combine the expanded video signal from.

As described above, in the enlarged display device according to the tenth embodiment, the child screen is not displayed when there is a frame position instruction from the user or the like, and when there is no frame position instruction, the child screen is not displayed. Is displayed, it is possible to prevent the frame and the child screen from overlapping when there is a frame position instruction, as in the above-described seventh embodiment.

Further, in this enlarged display device, it is only necessary to control the display of the sub-screen in accordance with the presence or absence of the frame position indication. Therefore, as in the above-described seventh to ninth embodiments, the frame and the sub-screen are displayed. It is not necessary to determine whether or not overlaps, and the processing load can be reduced.

By the way, when there is a frame position instruction, that is, while the user or the like is selecting an image to be enlarged, the child screen is not displayed. It is good also as a structure which performs.

In this case, even if the display position of the child screen is simply reduced and displayed, the probability that the frame and the child screen overlap will be small. However, as in the first or fourth embodiment described above, the frame may not be overlapped. By changing the position of the child screen when the child screen and the child screen overlap or when the frame and the child screen exist in the same area, it is possible to reliably prevent the frame and the child screen from overlapping.

Embodiment 11 FIG. FIG. 16 shows the first embodiment of the present invention.
1 is a diagram illustrating a configuration of an enlarged display device according to one embodiment. As shown in the figure, this enlarged display device sets a frame position according to a frame position instruction from a user or the like instead of the frame position setting unit 19 and the child screen control unit 20 in FIG. A frame / small screen setting unit 21 for controlling the synthesizing unit 15 so as not to display the sub screen when there is a frame position instruction from the user. And display control of the child screen. Other components function in the same manner as in the above-described tenth embodiment.

The frame / small screen control unit 21 sets the position of the frame in accordance with the frame position instruction,
5 Also, the frame / child screen control unit 21 displays the child screen as shown in FIG. 15A while there is a frame position instruction, and as shown in FIG. The synthesizing unit 15 is controlled so that the child screen is displayed on the screen. The control of the synthesizing unit 15 is the same as in the seventh and tenth embodiments described above. Thus, when there is no frame position instruction, the synthesizing unit 15 synthesizes the enlarged video signal from the enlargement unit 102 with the video signal from the input processing unit 101. It does not combine the expanded video signal from.

The enlarged display device according to this embodiment can prevent the frame and the child screen from overlapping when there is a frame position instruction, as in the tenth embodiment described above. Further, similarly to the tenth embodiment, the processing load can be reduced.

In this enlarged display device, a single frame / frame is set instead of the frame position setting unit 19 for setting the frame position and the child screen control unit 20 for controlling the display of the child screen in accordance with the frame position instruction. By providing the sub-screen setting unit 21, processing that has been executed independently in response to a frame position instruction can be processed in accordance with a single frame position instruction. Thus, the circuit scale can be reduced.

Embodiment 12 FIG. FIG. 17 shows the first embodiment of the present invention.
It is a figure showing composition of an expansion display concerning a 2nd embodiment. As shown in the figure, in the enlarged display device, the frame / small screen setting unit 21 shown in FIG. 16 is controlled by a controller 22 such as a microcomputer which controls the entire enlarged display device such as input of an instruction from a user or the like. Function.

The controller 22 executes processing such as setting of the frame position in accordance with the frame position instruction and control of the display of the sub-screen in parallel with processing such as control of the entire enlarged display device.

Specifically, similarly to the above-described third embodiment, execution of each process is managed by interruption, for example, setting of a frame position according to a frame position instruction, display control of a sub-screen, and the like. The priority of the interrupt of the process is lower than that of the control process of the other devices as a whole. By doing so, the processing of the entire apparatus with a high priority is preferentially executed, and the processing of setting the frame position according to the frame position instruction and changing the setting of the child screen position is performed during the idle time of this processing. Can be done.

In the enlarged display device according to the twelfth embodiment, a controller 22 for controlling the entire enlarged display device is provided.
As a function, the frame / sub-screen setting unit 21 that sets the frame position according to the frame position instruction from the user or the like and controls the synthesizing unit 15 so that the sub-screen is not displayed while the user or the like receives the frame position instruction is realized. Thus, it is possible to prevent the frame indicating the enlarged area from being hidden by the child screen without adding a special circuit.

[0087]

In the enlarged display device according to the first aspect of the present invention, the small screen position changing means changes the position of the small screen according to the enlarged area and the display position of the small screen. It is easy to avoid overlapping of the sub-screens.

Further, in the enlarged display device according to claim 2 of the present invention, the small screen position changing means, when the enlarged area and the small screen overlap each other, according to the display position of the small area, in accordance with the display position of the small screen. Since the position is changed to a position that does not overlap with the enlargement area, it is possible to prevent the overlap with the child screen displaying the enlarged image even when the frame indicating the enlargement area is moved.

Further, in the enlarged display device according to the third aspect of the present invention, at least the enlarged area setting means and the small screen position setting means are constituted by a single arithmetic means.
A series of operations can be processed continuously, which can contribute to a reduction in circuit scale.

Further, in the enlarged display device according to claim 4 of the present invention, at least the enlarged area setting means and the small screen position setting means are realized by a process having a lower interrupt priority than a process for controlling the entire enlarged display device. The processing of these means can be performed during the idle time of the control means.

Further, in the enlarged display device according to claim 5 of the present invention, the sub-screen position setting means divides the display area of the video signal into a plurality of areas, obtains an area to which the enlarged area belongs, and When the area is obtained and the area to which the enlarged area belongs and the area to which the child screen belongs are the same, by setting the child screen position to a position belonging to an area other than the area to which the enlarged area belongs, a simpler judgment In addition, it is possible to prevent the frame indicating the enlarged area from overlapping the child screen.

[0092] In the enlarged display device according to claim 6 of the present invention, the small screen display control means determines whether or not to display the small screen according to the enlarged area and the display position of the small screen or an input from the instruction input means. Is controlled, it is easy to avoid overlapping the frame indicating the enlarged area and the child screen.

In the enlarged display device according to the seventh aspect of the present invention, the small screen display control means displays the small screen when the enlarged area and the display position of the small screen do not overlap with each other. When the display positions of the screens overlap, by controlling the synthesizing unit so that the child screen is not displayed while the instruction to specify the enlarged area is input to the instruction input unit from the user, the enlarged area from the user is controlled. Can be prevented from being overlapped with the child screen displaying the enlarged image while the instruction for specifying the input is input.

Also, in the enlarged display device according to the eighth aspect of the present invention, at least the enlarged area setting means and the small screen position setting means are constituted by a single arithmetic means,
A series of operations can be processed continuously, which can contribute to a reduction in circuit scale.

Also, in the enlarged display device according to the ninth aspect of the present invention, at least the enlarged area setting means and the small screen position setting means are realized by a process having a lower interrupt priority than a process for controlling the entire enlarged display device. The processing of these means can be performed during the idle time of the control means.

In the enlarged display device according to the tenth aspect of the present invention, the child screen display control means displays the child screen while the instruction inputting means inputs the instruction for designating the enlarged area. By controlling the synthesizing means so as not to make it possible, it is possible to prevent overlapping with the child screen displaying the enlarged video while the instruction for designating the enlarged area is input from the user by a simple determination.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an enlarged display device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an image displayed on a screen of the enlarged display device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of an enlarged display device according to a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a configuration of an enlarged display device according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of an enlarged display device according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing an image displayed on a screen of an enlarged display device according to a fourth embodiment of the present invention.

FIG. 7 is a diagram illustrating an example of a table held in a small screen area setting unit of an enlarged display device according to a fourth embodiment of the present invention.

FIG. 8 is a diagram illustrating a configuration of an enlarged display device according to a fifth embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of an enlarged display device according to a sixth embodiment of the present invention.

FIG. 10 is a diagram illustrating a configuration of an enlarged display device according to a seventh embodiment of the present invention.

FIG. 11 is a diagram illustrating an image displayed on a screen of an enlarged display device according to a seventh embodiment of the present invention.

FIG. 12 is a diagram illustrating a configuration of an enlarged display device according to an eighth embodiment of the present invention.

FIG. 13 is a diagram illustrating a configuration of an enlarged display device according to a ninth embodiment of the present invention.

FIG. 14 is a diagram illustrating a configuration of an enlarged display device according to a tenth embodiment of the present invention.

FIG. 15 is a diagram showing an image displayed on a screen of an enlarged display device according to a tenth embodiment of the present invention.

FIG. 16 is a diagram illustrating a configuration of an enlarged display device according to an eleventh embodiment of the present invention.

FIG. 17 is a diagram illustrating a configuration of an enlarged display device according to a twelfth embodiment of the present invention.

FIG. 18 is a block diagram showing a configuration of a conventional enlarged display device.

FIG. 19 is a diagram showing an image displayed on a screen of a conventional enlarged display device.

[Explanation of symbols]

1, 8, 14, 19 Frame position setting unit, 2, 9 Child screen position setting unit, 3, 15 Synthesizing unit, 4, 11, 17,
21 Frame / small screen position setting unit, 6, 13, 18, 22
Controller, 16, 20 Child screen control unit, 10
1 input processing unit, 102 enlargement unit, 104 LCD
Drive unit, 105 lamp, 106 LCD panel,
107 projection lens, 108 screen.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FIG09G 5/36 520 H04N 5/45 H04N 5/45 G06F 15/66 355

Claims (10)

[Claims] 1. An instruction input means for inputting an instruction from a user, and an enlargement area setting means for setting an enlargement area in an externally supplied input video signal according to the instruction input by the instruction input means. An enlargement unit that enlarges an enlargement area of the input video signal set by the enlargement area setting unit; a frame generation unit that generates a video signal of a frame indicating the enlargement region; and a video signal enlarged by the enlargement unit. A child screen position setting means for setting a display position of a child screen for displaying an image based on, a video signal of a frame generated by the frame generating means and a video signal of the enlarged area enlarged by the enlarging means,
Combining means for combining the enlarged area in the input video signal with the display position of the small screen; display means for displaying the video signal combined by the combining means; and display positions of the enlarged area and the small screen. And a sub-screen position changing means for changing the position of the sub-screen in accordance with (1). 2. The child screen position changing means, according to a display position of the enlargement area and the child screen, sets a position of the child screen to a position not overlapping with the enlargement area when the enlargement area and the child screen overlap. The enlarged display device according to claim 1, wherein the display is changed. 3. An enlarged display device according to claim 1, wherein at least said enlarged area setting means and said small screen position setting means are constituted by a single arithmetic means. 4. An enlarged area setting means, comprising: interrupt processing means for executing a plurality of processes in parallel according to an interrupt priority; and control means for controlling the entire enlarged display device by executing a predetermined process. 2. The enlarged display device according to claim 1, wherein the child screen position setting means is realized by a process having a lower interrupt priority than a process for controlling the entire enlarged display device. 5. The sub-screen position setting unit divides a display area of the video signal into a plurality of areas, obtains an area to which the enlarged area belongs, obtains an area to which the sub-screen belongs, and sets an area to which the enlarged area belongs And when the area to which the child screen belongs is the same, the child screen position is a position belonging to an area other than the area to which the enlarged area belongs.
The enlarged display device as described in the above. 6. An instruction input means for inputting an instruction from a user, and an enlarged area setting means for setting an enlarged area in an externally supplied input video signal in accordance with the instruction input by the instruction input means. An enlargement unit that enlarges an enlargement area of the input video signal set by the enlargement area setting unit; a frame generation unit that generates a video signal of a frame indicating the enlargement region; and a video signal enlarged by the enlargement unit. A child screen position setting means for setting a display position of a child screen for displaying an image based on, a video signal of a frame generated by the frame generating means and a video signal of the enlarged area enlarged by the enlarging means,
Combining means for combining the enlarged area in the input video signal with the display position of the small screen; display means for displaying the video signal combined by the combining means; and display positions of the enlarged area and the small screen. Or a small-screen display control means for controlling whether or not to display the small-screen in response to an input from the instruction input means. 7. The sub-screen display control means displays the sub-screen when the enlarged area and the display position of the sub-screen do not overlap, and displays the sub-screen when the enlarged area and the display position of the sub-screen overlap. 7. The enlargement device according to claim 6, wherein the control unit controls the combining unit so that the child screen is not displayed while an instruction for designating the enlargement region is input from the user to the instruction input unit. Display device. 8. The enlarged display device according to claim 6, wherein at least said enlarged area setting means and said small screen position setting means are constituted by a single arithmetic means. 9. An enlargement area setting means, comprising: interruption processing means for executing a plurality of processes in parallel according to an interruption priority; and control means for controlling the entire enlarged display device by executing a predetermined process. 7. The enlarged display device according to claim 6, wherein the sub-screen position setting means is realized by a process having a lower interrupt priority than a process for controlling the entire enlarged display device. 10. The sub-screen display control means controls the synthesizing means so as not to display the sub-screen while an instruction for designating the enlarged area is input from the user to the instruction input means. 7. The enlarged display device according to claim 6, wherein: