JPH07123427A - Digital registration device - Google Patents

Abstract

PURPOSE:To set registration control data to a control position in an invisible area on a screen at the digital registration device for performing the registration control of a rear projector or the convergence control of a monitor. CONSTITUTION:After the registration control data are set to a visible control position on a screen 4, a value calculated by performing inserting/interpolating arithmetic from a data value at an adjacent control position among respective visible control positions on the screen is set as the registration control data to the control position in the invisible area on the screen 4. Thus, the data can be easily set to the control position in the invisible area on the screen 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital registration device suitable for use in registration adjustment of a rear projector and convergence adjustment of a monitor (CRT device).

[0002]

2. Description of the Related Art Conventionally, a digital registration apparatus has been developed which performs registration adjustment of a rear projector and convergence adjustment of monitors for personal computers and workstations. For example, in the case of a rear projector, its registration adjustment is performed while looking at the screen projected from it. FIG. 3 is a diagram showing the positional relationship between the screen and the adjustment points. In this figure, reference symbol A is an effective screen area on the screen, and reference symbol B.
Is an adjustment pattern projected on the screen.

The waveform shown on the left side of the drawing is a vertical synchronizing signal, and the waveform shown on the upper side of the drawing is a horizontal synchronizing signal. The operator, looking at the screen, selects one of the intersections (adjustment points) of the adjustment pattern B from the effective screen area A on the screen.
Registration adjustment data is set for each adjustment location (for example, c, d, e, f, ...). Note that C
The RT device displays the adjustment pattern on the screen,
Registration adjustment data is set for each adjustment point in the effective screen area.

[0004]

By the way, in the above-mentioned conventional digital registration apparatus, the adjustment pattern is projected on the screen, and the registration adjustment data is set for each adjustment position in the effective screen area. Although it can be performed, the adjustment points cannot be displayed on the screen for the adjustment points (for example, a, b, and o in FIG. 3) that are not visible on the screen. There is a problem that it is very difficult.

Therefore, it is an object of the present invention to provide a digital registration device capable of easily setting registration adjustment data at an adjustment location in an area that cannot be seen on the screen.

[0006]

In order to achieve the above object, a digital registration apparatus according to the invention of claim 1 outputs an adjustment pattern signal for outputting an adjustment pattern signal for displaying an adjustment pattern on a screen of an image output apparatus. Means, an adjustment location selection means for selecting a predetermined adjustment location on the adjustment pattern, and a control means for performing control for setting adjustment data at the adjustment location selected by the adjustment location selection means In the registration device, the control means obtains registration adjustment data of an area invisible on the screen of the video output device by performing extrapolation interpolation calculation from adjustment data of an edge of an area visible on the screen. It is characterized by setting it as a value.

In the digital registration apparatus according to the second aspect of the present invention, the adjustment pattern signal output means for outputting the adjustment pattern signal for displaying the adjustment pattern on the screen of the image output apparatus, and the predetermined adjustment pattern on the adjustment pattern. Adjustment location selecting means for selecting the adjustment location of
In a digital registration device including a control unit that performs control for setting adjustment data at the adjustment point selected by the adjustment point selection unit, the control unit is an invisible area on the screen of the video output device. The registration adjustment data is set to the same value as the adjustment data at the edge of the area visible on the screen. In a preferred aspect, the video output device is a rear projector or a monitor.

[0008]

According to the present invention, the registration adjustment data of the area that cannot be seen on the screen of the image output device is a value obtained by performing extrapolation interpolation from the adjustment data of the adjustment points at the ends of the area that is visible on the screen. To do. Or
Use the same value as the adjustment data for the adjustment points at the edges of the area visible on the screen. Therefore, it is possible to easily set the registration adjustment data for the adjustment portion in the area that cannot be seen on the screen of the video output device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Example 1. First Embodiment FIG. 1 is a block diagram showing a schematic configuration of a rear projector to which a first embodiment of a digital registration device of the present invention is applied. In this figure, reference numeral 1 is a rear projector body, a digital registration device 2 for performing registration adjustment, and three CRTs.
It is composed of (R, G, B) 3 and a screen 4.
An operation unit 5 gives various commands to the digital registration device 2.

FIG. 2 is a block diagram showing a schematic configuration of the digital registration device 2. In this figure, 6 is a microcomputer, CP (not shown)
It is composed of a U, a ROM and a RAM, and a program for controlling the CPU is written in the ROM. Further, the RAM is used as a work area in the interpolation calculation. In the registration adjustment mode, the microcomputer 6 controls the projection of the adjustment pattern B (see FIG. 3) on the screen 4 and the mark () for the selected adjustment point in the area visible on the screen 4 (effective screen area). "."), Control for writing the registration adjustment data set at the adjustment location in the memory 7, and registration adjustment data (extrapolated interpolation data) for the adjustment location in the area not visible on the screen 4. Set.

Here, the registration adjustment data is set in the adjustment area in the invisible area on the screen 4 as follows. Ie screen 4
Registration adjustment data is obtained and set by performing extrapolation interpolation calculation from the data values of the adjustment points close to the adjustment points in the invisible area on the screen 4 among the adjustment points in the upper effective screen area. . For example, the data values at the adjustment points a, b, and o in FIG.
, M, n, etc. are obtained by performing extrapolation interpolation calculation. In this case, the data setting for the adjustment points a, b, and o is automatically performed when the data setting is performed for these adjustment points that are close to each other and within the effective screen area A.

In FIG. 1, the memory 7 is an EEPROM.
(Electrical Erasable & Programmable ROM) is used, and registration adjustment data (including extrapolation interpolation data) is written. A data converter 8 converts the data read from the memory 7 into a predetermined data length and outputs it. Reference numeral 9 denotes a D / A (digital / analog) converter, which converts the data output from the data converter 8 into an analog signal and outputs the analog signal. A low-pass filter 10 removes the high frequency component of the analog signal output from the D / A converter 9 and outputs it. A character generator 11 generates a character for displaying the adjustment location selected by the adjuster on the screen.

The microcomputer 6 and the character generator 11 are adjusted pattern signal output means 10
Configure 0. Further, the microcomputer 6 and the operating section 5 constitute an adjustment point selecting means 110. The microcomputer 6 corresponds to the control means.

In such a configuration, when the coordinator operates the operation section 5 to issue a command for performing registration adjustment, the microcomputer 6 causes the screen 6 to display on the screen 4 an adjustment pattern of squares shown by a chain line in FIG. Display B. Then, when this adjustment pattern B is displayed,
The adjuster selects each intersection (for example, intersections c, d, e, f, etc.) of the adjustment pattern B displayed in the effective screen area A of the screen 4.
g, h, i, j, k, l, m, n), an adjustment location is selected, and registration adjustment data is set.
When the adjustment location is selected, the microcomputer 6
Is the character generator 11 for the selected intersection.
The data of "." Is read out and displayed on the screen 4. As a result, "." Is displayed at the selected adjustment location.

When "." Is displayed, the coordinator sets registration adjustment data for this adjustment location. When the setting of the data at each adjustment point is completed, the microcomputer 6 writes the adjustment data in the memory 7. Then, when the coordinator sets data for the adjustment location at the end of the effective screen area A, the microcomputer 6 approaches the adjustment location and the registration adjustment data for the adjustment location outside the effective screen area A. Set. The data to be set is obtained by performing extrapolation interpolation calculation from the data of the adjustment points at the end of the effective screen area A. The extrapolated interpolation data is automatically generated by the microcomputer 6 during the registration adjustment.

Example 2. In the first embodiment, the registration adjustment data for the adjustment location in the area that cannot be seen on the screen 4 is obtained by performing extrapolation interpolation calculation from the data of the adjustment location in the effective screen area A that is close to the location. In the second embodiment, the same value as the data of the adjustment point of the effective screen area A that is close to the adjustment point is used for the adjustment point of the area that cannot be seen on the screen 4. For example, for the adjustment points a and b in FIG. 3, registration adjustment data having the same value as that of the adjustment point c is used,
For the adjustment point o, the registration adjustment data having the same value as the adjustment point n is used. Also in this case, the first embodiment
In the same manner as above, when the coordinator performs data setting for the adjustment part at the end of the effective screen area A, the data is automatically set by the microcomputer 6. Needless to say, a program for performing this processing is naturally written in the ROM of the microcomputer 6.

Although each of the above embodiments is applied to the rear projector, it may be applied to a high resolution monitor used in a microcomputer or a workstation.

According to the present invention, the registration adjustment data of the area that cannot be seen on the screen of the image output device (rear projector in the embodiment) is extrapolated from the adjustment data of the adjustment points at the ends of the area that is visible on the screen. The value calculated by interpolation calculation or the same value as the adjustment data of the adjustment point at the edge of the area visible on the screen is used, so that it can be seen on the screen of the rear projector or monitor. Registration adjustment data can be easily set for adjustment points in a non-existing region. In addition, since the registration adjustment data is automatically set in the area that cannot be seen on the screen, the number of adjustment points to be adjusted by the adjuster can be reduced, and the registration adjustment data recording memory (Example Then, the capacity of the memory 7) can be reduced. Further, the overall adjustment time can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram of a rear projector to which an embodiment of a digital registration device according to the present invention is applied.

FIG. 2 is a block diagram of a digital registration apparatus according to the same embodiment.

FIG. 3 is a diagram showing a positional relationship between a screen and adjustment points.

[Explanation of symbols]

 4 screen 5 operation part 6 microcomputer (control means) 11 character generator 100 adjustment pattern signal output means 110 adjustment location selection means

Claims (6)

[Claims] 1. An adjustment pattern signal output means for outputting an adjustment pattern signal for displaying an adjustment pattern on a screen of an image output device; an adjustment location selecting means for selecting a predetermined adjustment location on the adjustment pattern; In a digital registration apparatus comprising: a control unit that performs control for setting adjustment data at the adjustment point selected by the adjustment point selection unit, the control unit is an invisible area on the screen of the video output device. The registration adjustment data is set to a value obtained by performing extrapolation interpolation calculation from the adjustment data at the end of the area visible on the screen. 2. An adjustment pattern signal output means for outputting an adjustment pattern signal for displaying an adjustment pattern on a screen of an image output device; an adjustment location selecting means for selecting a predetermined adjustment location on the adjustment pattern; In a digital registration apparatus comprising: a control unit that performs control for setting adjustment data at the adjustment point selected by the adjustment point selection unit, the control unit is an invisible area on the screen of the video output device. 2. The digital registration apparatus according to claim 1, wherein the registration adjustment data is set to the same value as the adjustment data at the end of the area visible on the screen. 3. The digital registration device according to claim 1, wherein the video output device is a rear projector. 4. The digital registration device according to claim 2, wherein the video output device is a rear projector. 5. The digital registration device according to claim 1, wherein the video output device is a monitor. 6. The digital registration device according to claim 2, wherein the video output device is a monitor.