JPH1013850A - Digital convergence device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital convergence device in which digital convergence is adjusted while displaying an external video source, the number of adjustments is optionally selected and adjustment point data on a line are adjusted to the same data with respect to the adjustment. SOLUTION: A control signal from an address control section 3 is used to drive a cursor generating circuit 4, and an output of an on-screen display circuit 5 receiving the cursor control signal generated by the cursor generating circuit 4 and an external input signal are received by a video circuit 6, which displays a video image on a projection screen. Then a color desired for correction is selected and convergence correction data are written in a nonvolatile memory 14 by using, e.g. a red data write key provided on a control panel 15 while observing the screen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting convergence of a color television receiver, and more particularly to a digital convergence apparatus (international apparatus) capable of performing high-accuracy correction with reduced mutual interference of correction data between inside and outside of an effective screen. Patent classification H04N 9/28).

[0002]

2. Description of the Related Art In general, in a projection type color image receiver for enlarging and projecting onto a screen using three projection tubes emitting three primary colors, the angle of incidence of the projection tube on the screen is different for each projection tube. Color shift occurs. The so-called convergence, in which these three primary colors are superimposed, is a method of creating a convergence correction waveform in an analog manner in synchronization with the horizontal and vertical scanning periods, changing the size and shape of the waveform, and adjusting the waveform. There is a problem in convergence accuracy. Therefore, a digital convergence apparatus has been proposed as a method capable of coping with various signals and having high convergence accuracy. For example, Japanese Patent Application Laid-Open No. 4-586
No. 90 has proposed a digital convergence device. The conventional digital convergence device is shown in FIG.
This will be described below using 4, 6, and 9.

FIG. 4 shows a configuration of a conventional digital convergence device. In FIG. 4, 1 is a synchronization signal, 2 is a scanning line number discriminator, 3 is an address controller, 6 is a video circuit, 8 is a vertical interpolation calculator, 9 is a volatile memory, 10 is a D / A converter, 11 Denotes an LPF, 12 denotes an amplifier circuit, 13 denotes a convergence yoke, 14 denotes a nonvolatile memory, 15 denotes a control panel, and 16 denotes a test pattern generation circuit. The operation of the digital convergence device configured as described above will be described below.

In FIG. 4, a synchronization signal 1 synchronized with a deflection current cycle is input to an address control unit 3 and to a scanning line number determination unit 2. The scanning line number discrimination result of the scanning line number discrimination unit 2 is input as a control signal of the address control unit 3, and the test signal generation circuit 16 and the vertical interpolation calculation unit 8 are controlled by the control signal and the control signal from the control panel 15. Control.

[0005] A test pattern generating circuit 16 is driven by a control signal from the address control section 3, and an output of the test pattern generating circuit 16 and an external video signal 7 are selected as input and the video circuit 6 is selected on the projection screen. An image is projected on the screen. When the output of the test pattern generation circuit 16 is selected as the input of the video circuit 6, a test pattern (for example, a cross hatch pattern) as shown in FIG. 2 is projected on the projection screen. A in the figure represents the cursor position.

Next, in the case of a color to be corrected, for example, red, the correction amount is written in the nonvolatile memory 14 while viewing the screen with a red data write key provided on the control panel 15.

When the external video signal 7 is selected as an input to the video circuit 6, when the external video signal 7 is, for example, a video signal of a tree, a signal shown in FIG.
Is projected. Thus, the external video signal 7
Is projected on the projection screen, the digital convergence correction is not performed.

The correction data writing method includes a method of adding and subtracting specific data to and from a data at a position indicated by a cursor, an adjustment point on a straight line in a vertical direction with respect to the cursor, and a straight line in a horizontal direction with respect to the cursor position. There is a method of adding or subtracting specific data to the data at the adjustment point.

FIG. 6 shows an image of the test pattern. In FIG. 6, A is the position of the current adjustment point, that is, the position of the cursor. Numerical values in the figure represent the positions of the adjustment points, and numerical values from 0 to 15 in the horizontal direction and from 0 to 10 in the vertical direction. Hereinafter, the position of the adjustment point is represented using this numerical value, such as (horizontal coordinate, vertical coordinate).

In the case of FIG. 6, the cursor position A is represented by (5, 3). Also, the numerical values and characters in the figure do not appear in the actually projected video. A line (ab) in FIG. 6 represents an adjustment point on a straight line in the horizontal direction with respect to the cursor position, that is, a position that is (vertical coordinate = 3). The middle line (c
−d) represents an adjustment point on a straight line in the vertical direction with respect to the cursor position, that is, a position that is (horizontal coordinate = 5). The adjustment point (vertical coordinate = 3) will be described as an example.

FIG. 7 shows the horizontal coordinate of the adjustment point at the position of (vertical coordinate = 3) on the horizontal axis and the correction data on the vertical axis. In FIG. 7, the broken line B is a waveform representing the correction data of each adjustment point before the adjustment is performed, and the correction data at the cursor position A is X1. It is assumed that the current mode is a mode for adjusting data of an adjustment point on a straight line in a horizontal direction with respect to a cursor position. At this time, in FIG. 7, when the adjustment data of the point A is increased by Δ, the adjustment point on the straight line (ab) in the horizontal direction, that is, (the vertical coordinate =
The data at the adjustment point 3) increases by Δ, and the adjusted waveform becomes a waveform as shown by the curve C, which is increased by Δ as a whole. Thus, data on a straight line in the horizontal direction can be adjusted.

The adjustment of data that is on a straight line in the vertical direction is performed in the same manner as the data adjustment in the horizontal direction. Further, in order to correspond to various image signal sources, it is necessary to perform processing between adjustment points according to the number of scanning lines. Therefore, the vertical interpolation calculation unit 8 performs vertical interpolation based on the correction data in the volatile memory 14. An interpolation operation is performed, and the result of the vertical interpolation operation is written to the volatile memory 9 as needed.

The convergence correction data stored in the volatile memory 9 is converted into an analog amount by the D / A conversion circuit 10 and then smoothed by the LPF 11. Digital convergence control is performed in which the output of the LPF 11 is input to an amplifier circuit 12 and the amplified convergence correction data is applied to a convergence yoke 13.

[0014]

As described above, when digital convergence correction of a color television receiver is performed using a digital convergence device, a screen displaying a cross hatch and a cursor indicating the current adjustment point position is viewed. Adjust convergence while doing. Therefore, the projection of the external video source is continuously performed, and when the convergence shift occurs due to aging, temperature change, etc., the digital convergence adjustment cannot be performed unless the projection of the external video source is interrupted. There was a problem.

Further, when there is a shift in the synchronous phase between the internal cross hatch and the external video signal, there is a problem that the digital convergence adjustment of the portion corresponding to the synchronous phase shift cannot be performed.

Furthermore, the size of the cursor indicating the position of the current adjustment point is fixed, and by specifying the size of the cursor, the number of adjustment points to be adjusted by one adjustment can be set arbitrarily. However, there is a problem that the adjustment is not flexible and the adjustment takes time.

Furthermore, in digital convergence adjustment, there is a mode in which data of adjustment points on a straight line in the vertical and horizontal directions is collectively adjusted with respect to the position of the adjustment point as a basic adjustment. If the data on the straight line varies, and the data on the straight line is the same, it is necessary to adjust each adjustment point to the desired data. There was a problem.

[0018]

According to the first and second aspects of the present invention, in order to solve the above-mentioned problems, an input video source and a cursor indicating a convergence correction position are simultaneously displayed. It is.

According to the present invention, it is possible to provide a digital convergence device capable of performing digital convergence adjustment without interrupting projection of an external video source.

According to the third and fourth aspects of the present invention, in order to solve the above-mentioned problem, the size of the cursor is designated at the time of digital convergence adjustment and the adjustment range is arbitrarily set.

According to the present invention, it is possible to provide a digital convergence device capable of arbitrarily setting the number of adjustment points to be adjusted by one convergence adjustment and displaying the adjustment range on a screen.

According to a fifth aspect of the present invention, in order to solve the above problems, the data of one adjustment point is adjusted at the time of digital convergence adjustment, so that the data of the adjustment points aligned in a horizontal and vertical direction are aligned. Is adjusted to the same data as the data at one adjustment point.

According to the present invention, when it is desired to make the data of the adjustment points aligned in a straight line horizontally and vertically, it is not necessary to set the data of the adjustment points to desired data one by one, and the adjustment is started. A digital convergence device capable of reducing time can be provided.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital convergence correction apparatus according to the present invention is a digital convergence apparatus for correcting a convergence shift of a color television receiver, wherein a plurality of convergence adjustments are performed in a horizontal and vertical direction on a screen of the color television receiver. Generating a point, performing digital convergence adjustment while superimposing and displaying a cursor indicating the position of the convergence adjustment point currently being adjusted on an internal crosshatch signal or an externally input image, The digital convergence adjustment can be performed without interrupting the projection of the external video source.

Next, the digital convergence correction apparatus of the present invention is controlled by a scanning line number discriminating unit which receives a synchronization signal synchronized with the deflection current cycle as input, and which receives the synchronization signal as input. An address control unit, a control panel for performing control related to adjustment such as selection of an adjustment color, a cursor generation circuit controlled by the address control unit and the control panel, an on-screen display circuit controlled by the cursor generation circuit, A video circuit to which an output of an on-screen display circuit and an external video signal are input; a non-volatile memory controlled by the control panel and storing convergence correction data; and a non-volatile memory controlled by the address control unit and stored in the non-volatile memory. Interpolation calculation based on the corrected convergence data A vertical interpolation operation unit for performing the operation, a volatile memory for holding data interpolated by the vertical interpolation operation unit, a D / A converter for converting data in the volatile memory into an analog signal, and the D / A conversion And a convergence yoke driven by the amplifying circuit, the LPF having an input of an output of the amplifier, an amplifying circuit having an input of the output of the LPF, and interrupting the projection of an external video source. The digital convergence adjustment can be performed without performing.

Next, a digital convergence device according to the present invention is characterized in that, in the digital convergence device according to the first aspect, at the time of digital convergence adjustment, the size of a cursor for designating an adjustment range is controlled from a control panel. In the digital convergence adjustment, the size of the cursor can be designated and the adjustment range can be set arbitrarily.

Next, a digital convergence device according to the present invention is the digital convergence device according to claim 2, wherein the digital convergence adjustment is performed at the time of digital convergence adjustment.
The apparatus further comprises means for controlling the size of the cursor controlled by the control panel, wherein the size of the cursor can be designated and the adjustment range can be arbitrarily set at the time of digital convergence adjustment.

Next, in the digital convergence device according to the first aspect of the present invention, in the digital convergence device according to the first aspect, at the time of digital convergence adjustment, data at one adjustment point is adjusted so as to be aligned in a horizontal and vertical direction. It is characterized in that the data of the adjustment points arranged in line is the same data as the data of the one adjustment point.Digital convergence adjustment, when it is desired to make the data of the adjustment points aligned in a horizontal and vertical line the same, It is not necessary to set data one by one to desired data, and the time required for adjustment can be reduced.

Next, in the digital convergence apparatus according to the present invention, the digital convergence apparatus according to claim 2 performs horizontal or horizontal correction by correcting convergence of one adjustment point designated by the control panel at the time of digital convergence adjustment. The data of the adjustment points aligned on a straight line in the vertical direction are also the same data as the adjustment data of the one adjustment point, and the data is stored in a nonvolatile memory, at the time of digital convergence adjustment,
When it is desired to make the data of the adjustment points aligned on a straight line horizontally and vertically identical, it is not necessary to set the data of the adjustment points one by one to desired data, and the time required for the adjustment can be reduced.

(Embodiment 1) A digital convergence device according to the first and second aspects of the present invention will be described below with reference to FIGS. 1, 2 and 3. FIG.

FIG. 1 is a block diagram of a digital convergence apparatus according to the present invention.
Is an address control unit, 4 is a cursor generation circuit, 5 is an on-screen display circuit, 6 is a video circuit, 7 is an external video signal, 8 is a vertical interpolation operation unit, 9 is a volatile memory, Reference numeral 10 denotes a D / A conversion circuit, 11 denotes a low-pass filter (hereinafter referred to as LPF), 12 denotes an amplifier circuit, 13 denotes a convergence yoke, 14 denotes a nonvolatile memory, and 15 denotes a control panel. The operation of the digital convergence device configured as described above will be described below.

In FIG. 1, a synchronization signal 1 synchronized with a deflection current cycle is input to an address control unit 3 and a scanning line number determination unit 2. The scanning line number discrimination result of the scanning line number discrimination unit 2 is input as a control signal of the address control unit 3, and the cursor generation circuit 4 and the vertical interpolation calculation unit 8 are controlled by the control signal and the control signal from the control panel 15. Control.

First, the cursor generation circuit 4 is driven by a control signal from the address control unit 3, and the on-screen display circuit 5 which receives the cursor control signal generated by the cursor generation circuit 4 is driven.
Is projected on the projection screen by the video circuit 6 as a video in which a test pattern (for example, a cross hatch pattern) and a cursor are superimposed. The projected image is as shown in FIG. In the figure, A represents the position of the cursor. Next, the convergence correction data can be written on the non-volatile memory 14 while watching the screen, and the convergence adjustment can be performed on the screen by using a red data write key provided on the control panel 15 for the color to be corrected, for example, for red. .

Further, the convergence adjustment can be performed while displaying the external video signal, and the cursor generation circuit 4 is driven by the control signal from the address control section 3,
The video circuit 6 which receives the cursor control signal generated by the cursor generation circuit 4 and receives the output of the on-screen display circuit 5 and the external input signal 7 displays an image as shown in FIG. 3 on the projection screen. . That is, a cursor or a cross hatch by the on-screen display circuit 5 can be displayed on the image based on the external image signal. A in FIG. 3 similarly indicates the position of the cursor. Next, a color to be corrected is selected. For example, if the color is red, the convergence correction data is written in the nonvolatile memory 14 while viewing the screen with a red data write key provided on the control panel 15, and the convergence adjustment is performed on the screen. be able to.

In order to correspond to various image signal sources, it is necessary to perform processing between adjustment points according to the number of scanning lines. And the vertical interpolation operation is performed, and the result of the vertical interpolation operation is written to the volatile memory 9 as needed. After the convergence correction data stored in the volatile memory 9 is converted into an analog amount by the D / A conversion circuit 10,
Smoothing is performed by a low pass filter (LPF) 11. This LP
The output of F11 is input to the amplifier circuit 12, and the amplified convergence correction data is input to the convergence yoke 1
Supply 3

As described above, according to the digital convergence apparatus of this embodiment, the input video source and the cursor indicating the convergence correction position can be displayed simultaneously. Thus, digital convergence adjustment can be performed without interrupting the projection of the external video source.

(Embodiment 2) Next, a digital convergence apparatus according to the third and fourth aspects of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. Note that the same reference numerals are used for the same components as those in the above-described embodiment.
Description is omitted. In FIG. 1, a synchronization signal 1 synchronized with a deflection current cycle is input to an address control unit 3 and a scanning line number determination unit 2. The scanning line number discrimination result of the scanning line number discrimination unit 2 is input as a control signal of the address control unit 3, and the cursor generation circuit 4 and the vertical interpolation calculation unit 8 are controlled by the control signal and the control signal from the control panel 15. Control.

First, the cursor generation circuit 4 is driven by a control signal from the address control section 3, and the on-screen display circuit 5 which receives the cursor control signal generated by the cursor generation circuit 4 is driven. Is output by the video circuit 6 on the projection screen to project an image in which a test pattern (for example, a cross hatch pattern) and a cursor are overlapped on the screen. The projected image is as shown in FIG. In the figure, A represents the position of the cursor.

Here, a point on the right side of the cursor A in the horizontal direction,
And the point to the right of it also wants to change the data,
Under the control of the control panel 15, the on-screen display circuit 5 switches to the batch data selection mode, and selects and instructs the cursor A to expand rightward in the horizontal direction. As a result of this operation, the screen is displayed with the cursor long to the right as shown in FIG. A, B, and C in FIG. 5 are adjustment points to be adjusted, and a cursor is indicated by a thick line in the figure.

Next, a color to be corrected is selected, convergence correction data is written into the nonvolatile memory 14 while looking at the screen, and convergence adjustment is executed. At this time, the convergence correction data is written into the nonvolatile memory 14 at addresses corresponding to positions A, B, and C in FIG. By performing the adjustment in the same manner, data of an arbitrary number of adjustment points can be adjusted collectively.

When it is necessary to perform convergence adjustment while displaying an external video signal, the operation can be realized by the same operation as described above. Further, in order to correspond to various image signal sources, it is necessary to perform processing between adjustment points according to the number of scanning lines. Therefore, the vertical interpolation calculation unit 8 performs vertical interpolation based on the correction data in the volatile memory 14. An interpolation operation is performed, and the result of the vertical interpolation operation is written to the volatile memory 9 as needed. After the convergence correction data stored in the volatile memory 9 is converted into an analog amount by the D / A conversion circuit 10, the data is smoothed by the LPF 11. The output of the LPF 11 is input to the amplifier circuit 12, and the amplified convergence correction data is supplied to the convergence yoke 13.

As described above, according to the digital convergence apparatus of this embodiment, the number of adjustment points to be adjusted by one convergence adjustment is arbitrarily set, and the adjustment points are displayed on the screen and adjusted. The time can be reduced and the number of adjustment steps can be reduced.

(Embodiment 3) Next, a digital convergence apparatus according to claims 5 and 6 of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. Note that the same reference numerals are used for the same components as those in the above-described embodiment.
Description is omitted.

In FIG. 1, a synchronization signal 1 synchronized with the deflection current cycle is input to an address control unit 3 and a scanning line number determination unit 2. The scanning line number discrimination result of the scanning line number discrimination unit 2 is input as a control signal of the address control unit 3, and the cursor generation circuit 4 and the vertical interpolation calculation unit 8 are controlled by the control signal and the control signal from the control panel 15. Control.

First, the cursor generation circuit 4 is driven by a control signal from the address control unit 3, and the on-screen display circuit 5 fetching the cursor control signal generated by the cursor generation circuit 4 is driven.
Is output on the projection screen by the video circuit 6 as an on-screen image in which a cursor is overlapped with a test pattern (for example, a cross hatch pattern). The projected image is as shown in FIG. A in the figure represents the cursor position.

FIG. 6 shows an image of the test pattern, in which A is the position of the current adjustment point, that is, the position of the cursor. Numerical values in the figure represent the positions of the adjustment points, and numerical values from 0 to 15 in the horizontal direction and from 0 to 10 in the vertical direction. Hereinafter, the position of the adjustment point is represented by using this numerical value like coordinates (horizontal coordinates, vertical coordinates). For example, in the cursor shown in FIG. 6, the cursor position A is represented as (5, 3).

A line (ab) in FIG. 6 represents an adjustment point on a straight line in the horizontal direction with respect to the cursor position, that is, a position (vertical coordinate = 3). A line (cd) in the figure represents an adjustment point on a straight line in the vertical direction with respect to the cursor position, that is, a position (horizontal coordinate = 5). The adjustment point (vertical coordinate = 3) will be described as an example. FIG. 8 shows the horizontal axis of the adjustment point at the position of (vertical coordinate = 3) on the horizontal axis and the correction data on the vertical axis.

In FIG. 8, it is assumed that a broken line B is a waveform representing correction data at each adjustment point before adjustment is performed. Cursor position A
Is the correction data X1. It is assumed that the current mode is a mode for adjusting data of an adjustment point on a straight line in a horizontal direction with respect to a cursor position. In this mode, when the adjustment data of the point A is increased by Δ in the vertical interpolation calculation unit 8, the data of the adjustment point on the straight line in the horizontal direction becomes X2 which is the same data as the adjustment data of the point A, Becomes like a straight line D. At this time, in the nonvolatile memory 14, the address corresponding to (vertical coordinate = 3)
The same data as the adjustment data is written. The adjustment can be similarly performed for the adjustment point on the straight line in the vertical direction. In addition, in order to correspond to various image signal sources, it is necessary to perform processing between adjustment points according to the number of scanning lines. Therefore, the vertical interpolation operation unit 8 performs vertical interpolation based on the correction data in the volatile memory 14. An interpolation operation is performed, and the result of the vertical interpolation operation is written to the volatile memory 9 as needed.

After the convergence correction data stored in the volatile memory 9 is converted into an analog amount by the D / A conversion circuit 10, the data is smoothed by the LPF 11. This LPF1
1 is input to the amplifier circuit 12, and the convergence correction data amplified here is supplied to the convergence yoke 13.

As described above, according to the digital convergence apparatus of this embodiment, when digital convergence adjustment is performed, if it is desired to make the data of the adjustment points aligned in a horizontal and vertical line the same, the data of the adjustment points are set one by one. There is no need to adjust to the desired data, and the time required for adjustment can be reduced.

[0051]

As described above, according to the digital convergence apparatus of the present invention, it is possible to perform digital convergence adjustment while watching an image even when an external image source is continuously displayed. Also, by changing the size of the cursor, the number of adjustment points that can be adjusted simultaneously can be arbitrarily selected. Since the adjustment mode for performing the adjustment is provided, the time required for the adjustment can be reduced, and the number of adjustment steps can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a digital convergence device according to an embodiment of the present invention.

FIG. 2 is an example of a display screen showing a digital convergence adjustment screen using a cross hatch according to the embodiment.

FIG. 3 is a display screen example showing a digital convergence adjustment screen in the case where a tree image is used as an image source in the first embodiment.

FIG. 4 is a block diagram of a digital convergence device according to a conventional example.

FIG. 5 is an example of an image projected on a screen according to an embodiment of claims 3 and 4;

FIG. 6 shows an example of an image projected on a screen according to an embodiment of claims 5 and 6;

FIG. 7 is a graph showing the adjustment point position on the horizontal axis and the size of the adjustment point data on the vertical axis according to the embodiment.

FIG. 8 is a graph showing the adjustment point position on the horizontal axis and the size of the adjustment point data on the vertical axis according to the third embodiment.

FIG. 9 is a diagram showing an example of an image projected by a digital convergence device according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synchronization signal 2 Scan line number discrimination part 3 Address control part 4 Cursor generation circuit 5 On-screen display circuit 6 Video circuit 7 External video signal 8 Vertical interpolation calculation part 9 Nonvolatile memory 10 D / A conversion circuit 11 LPF 12 Amplification circuit 13 Convergence yoke 14 Non-volatile memory 15 Control panel 16 Test pattern generation circuit

Claims (6)

[Claims] 1. A digital convergence apparatus for correcting a focus shift of a color television receiver, wherein a plurality of convergence adjustment points are generated in a horizontal and vertical direction on a screen of the color television receiver, and among the convergence adjustment points, A digital convergence apparatus, wherein a cursor indicating a desired adjustment point position and an external input image are displayed in a superimposed manner to perform digital convergence adjustment. 2. A scanning line number discriminating unit that receives a synchronization signal synchronized with a deflection current cycle, an address control unit that receives the synchronization signal and is controlled by the scanning line number discriminating unit, and selects an adjustment color. A signal input unit for controlling the adjustment of
A cursor generation circuit controlled by the address control unit and the signal input unit; an on-screen display circuit that receives an output of the cursor generation circuit as an input; and a video circuit that receives an output of the on-screen display circuit and an external video signal. And a nonvolatile memory controlled by the control panel and storing convergence correction data. 3. A digital convergence adjustment method according to claim 1, wherein a range of the adjustment can be arbitrarily designated by controlling a size of a cursor indicating a position of a current adjustment point from a control panel. Convergence device. 4. The digital convergence apparatus according to claim 2, further comprising means for arbitrarily setting the size of a cursor controlled by said control panel when adjusting digital convergence. 5. At the time of digital convergence adjustment, by adjusting data of one adjustment point, data of an adjustment point aligned in a horizontal and vertical direction with respect to the one adjustment point is obtained.
2. The digital convergence apparatus according to claim 1, wherein the data is the same as the data of the one adjustment point. 6. The digital convergence adjustment is performed by designating a signal input section and performing convergence correction, whereby the adjustment data of the adjustment points aligned in a horizontal or vertical direction with respect to the one adjustment point are also adjusted data of the one adjustment point. 3. The digital convergence device according to claim 2, wherein the same data is stored in the nonvolatile memory.