JP2020076882A - Positional deviation correction device, projector, and positional deviation correction method - Google Patents

Abstract

To provide a positional deviation correction device, a projector, and a positional deviation correction method that can correct respective positional deviation of a device to be adjusted resulting from an external factor and an internal factor, without using a pattern video for adjustment.SOLUTION: A positional deviation correction device of the present invention comprises: a storage unit; a positional deviation detector that detects the amount of positional deviation of a device to be adjusted; a temperature sensor that detects the temperature of a block to be adjusted to which the device to be adjusted is attached; a driving mechanism for moving the device to be adjusted in the block to be adjusted; and a system control unit that moves the device to be adjusted by using the driving mechanism such that the amount of positional deviation of the device to be adjusted detected by the positional deviation detector matches a reference value stored in advance in the storage unit, and the position of the device to be adjusted varying depending on the temperature detected by the temperature sensor returns to the original position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a position shift correction device that corrects a position shift of an adjusted device, a projector including the position shift correction device, and a position shift correction method.

  The projector is provided with three display devices corresponding to the three primary colors of red, green, and blue, and one color image is formed by synthesizing color light that is optically modulated by each display device based on a video signal. A plate type configuration is known. In such a three-plate type projector, it is necessary to accurately match the respective color lights emitted from the three display devices for each pixel of the projected image so that color deviation does not occur in the combined projected image. At this time, matching (converging) of the emitted light of each display device for each pixel of the projected image is referred to as convergence, and matching the convergence is referred to as convergence correction or convergence adjustment. The device to be adjusted refers to a device such as a display device whose position is adjusted to correct the convergence, for example.

  An adjusting mechanism for adjusting the convergence is disclosed in Patent Document 1, for example. Patent Document 1 includes an adjustment-side plate to which a display device is fixed, and a fixed-side plate that holds the adjustment-side plate slidably in the vertical and horizontal directions, and a plurality of adjustments provided at the ends of the fixed-side plate. A configuration is described in which fine adjustment of the position of the adjustment side plate is possible while supporting the adjustment side plate with a screw.

Convergence adjustment is usually performed at the time of production of the projector and after-sales service. However, by providing the above-described mechanism for adjusting the position of the display device, the position of the display device may fluctuate due to external factors such as vibration during transportation, and the convergence may shift. Moreover, the position of the display device may fluctuate due to an internal factor such as thermal expansion of the optical component, which may result in deviation of the convergence.
Therefore, in Patent Document 2, for example, the image light of the pattern image for adjustment projected on the screen is sequentially detected by a photo sensor arranged in front of the screen, and the deviation of registration of the projected image is corrected based on the detection signal. It is described to do. "Registration" has the same meaning as "convergence".
Further, Patent Document 3 describes that a pattern image for adjustment projected on a screen is photographed by an imaging device, and a positional shift of the projected image is detected from the photographed image and corrected.

  Although it is not a three-plate type projector, there are convergence adjustment devices for adjusting the convergence of three light beams of red, green and blue projected from each CRT of a three-tube type projector. It is disclosed in. In Patent Documents 4 to 8, a plurality of light detecting elements are arranged around the screen, and the convergence is adjusted based on the position of the adjustment pattern image projected on the screen, which is detected by each light detecting element. Is described. Further, Patent Document 9 describes that convergence correction data corresponding to a plurality of adjustment points set on a display screen is stored, and the correction data is further corrected according to the brightness of the display screen. ing.

JP, 10-39270, A JP, 2003-233125, A JP, 2011-164246, A JP-A-7-336703 JP, 7-336704, A JP-A-8-9399 JP-A-8-149522 JP-A-8-331576 JP 2004-208106 A

As described above, for example, in a three-plate type projector, by providing a mechanism for adjusting the position of the display device, the position of the display device may fluctuate due to external factors such as vibration during transportation, and the convergence may shift. is there. Further, the position of the display device may fluctuate due to internal factors such as expansion of the optical component due to heat, resulting in deviation of the convergence.
The above-mentioned Patent Document 1 proposes a convergence adjustment mechanism that is supposed to manually adjust the convergence with high precision during production of the projector or after-sales service. Therefore, the technique described in Patent Document 1 cannot deal with the case where the position of the display device is displaced due to the external factor. Further, with the technique described in Patent Document 1, it is not possible to correct the deviation in convergence caused by the above-mentioned internal factors when the user uses the projector.

On the other hand, with the techniques described in Patent Documents 2 and 3, it is possible to correct the convergence even when the user uses the projector. However, in the technique described in Patent Document 2, it is necessary to dispose the photo sensor in front of the screen and display the pattern image for adjustment when the convergence is corrected. Therefore, the technique described in Patent Document 2 cannot dynamically correct the convergence while the user is projecting a desired image.
Similarly, the technique described in Patent Document 3 also needs to display a pattern image for adjustment when correcting the convergence, so that the user can dynamically correct the convergence while projecting a desired image. is not.

  Note that the above-mentioned Patent Documents 4 to 9 are technologies relating to a three-tube type projector, and have a configuration in which the convergence is adjusted by demagnetizing the magnetic field in the light beam emitted from the CRT. Therefore, Patent Documents 4 to 9 do not show any method for correcting the convergence required due to the displacement of the display device.

  The present invention has been made to solve the problems of the background art as described above, and the positional deviation of the device to be adjusted due to external factors and internal factors without using a pattern image for adjustment or the like. It is an object of the present invention to provide a positional deviation correction device, a projector, and a positional deviation correction method capable of respectively correcting the above.

In order to achieve the above-mentioned object, a positional deviation correction device of the present invention includes a storage unit,
A displacement detector that detects the amount of displacement of the device to be adjusted,
A temperature sensor for detecting the temperature of the adjusted block to which the adjusted device is attached,
A drive mechanism for moving the adjusted device in the adjusted block;
The position adjustment amount of the adjustment target device detected by the position deviation detector matches a reference value stored in advance in the storage unit, and the adjustment target device varies depending on the temperature detected by the temperature sensor. A system control unit that moves the device to be adjusted by using the drive mechanism so that the position returns to the original position,
Have.

A projector according to an aspect of the invention includes the positional deviation correction device,
A display device that is a device to be adjusted,
Have.

On the other hand, the positional deviation correction method of the present invention includes a storage unit,
A displacement detector that detects the amount of displacement of the device to be adjusted,
A temperature sensor for detecting the temperature of the adjusted block to which the adjusted device is attached,
A drive mechanism for moving the adjusted device in the adjusted block;
Be prepared,
Computer
The device to be adjusted in which the amount of positional deviation of the device to be adjusted detected by the position deviation detector and a reference value stored in advance in the storage unit match, and fluctuates depending on the temperature detected by the temperature sensor Is a method of moving the device to be adjusted by using the drive mechanism so that the position returns to the original position.

  According to the present invention, it is possible to respectively correct the positional deviation of the device to be adjusted due to external factors and internal factors without using a pattern image for adjustment or the like.

It is a block diagram showing an example of 1 composition of a position gap amendment device of the present invention. 6 is a flowchart showing an example of a processing procedure according to the positional deviation correction method of the present invention.

Next, the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an example of the configuration of the positional deviation correction device of the present invention.
As shown in FIG. 1, the positional deviation correction device of the present invention includes a drive control unit 110, a system control unit 111, and a storage unit 112, and the positional deviation of a display device included in the light modulation block 100 as an adjusted device ( This is a configuration for correcting the convergence deviation).
In the present embodiment, a positional deviation correction apparatus of the present invention will be described by taking a display device included in a light modulation block 100 included in a three-plate projector as an adjustment target device. The device to be adjusted whose positional deviation is to be corrected is not limited to the display device, and the positional deviation correcting device of the present invention is also applied to a configuration for correcting the positional deviation of other adjusted devices with high precision. It is possible.

The light modulation block 100 includes a color synthesizing prism 101, a temperature sensor 102, a Y-axis drive mechanism 103, a Y-axis pressure sensor 104, an X-axis pressure sensor 105, a movable sheet metal 106, an X-axis drive mechanism 107, a display device 108 and a plate 109. Have.
The light modulation block 100 includes three sets of light modulation units corresponding to the three primary colors of red (R), green (G), and blue (B). The light modulation unit includes a Y-axis drive mechanism 103, a Y-axis pressure sensor 104, an X-axis pressure sensor 105, a movable metal plate 106, an X-axis drive mechanism 107, a display device 108, and a plate 109. FIG. 1 shows only an example of connection between one set of light modulation units and the drive control unit 110, the system control unit 111, and the storage unit 112. The connection between the other two sets of light modulation units and the drive control unit 110, the system control unit 111, and the storage unit 112 is similar to the connection relationship shown in FIG.

  The display device 108 forms the image light corresponding to the video signal by optically modulating the irradiation light according to the video signal supplied from the video processing circuit (not shown). A DMD (Digital Micro-mirror Device), a liquid crystal panel, or the like is used for the display device 108. FIG. 1 shows a configuration example of a light modulation block 100 including a transmissive liquid crystal panel as the display device 108. As described above, the display device 108 is an example of the adjusted device that is the correction target of the positional deviation correction device of the present invention.

The color combining prism 101 optically combines the color lights optically modulated by the three display devices 108 and outputs the combined color lights. As the color combining prism 101, for example, a dichroic prism is used. A temperature sensor 102 for detecting the temperature of the light modulation block 100 including the color synthesizing prism 101 is attached to one surface of the color synthesizing prism 101 where the display device 108 is not installed.
As the temperature sensor 102, a known temperature sensor such as a thermocouple, a thermistor, a resistance temperature detector (RTD: Resistance Temperature Detector (or Device)) may be used. The temperature sensor 102 may include a configuration including various temperature sensors and peripheral circuits for correcting the linearity and sensitivity of the output characteristics of the temperature sensors. The temperature sensor 102 is only required to be able to detect the temperature of the light modulation block 100, and its mounting position is not limited to one surface where the display device 108 of the color synthesizing prism 101 is installed.

The display device 108 is attached to the movable metal plate 106, and is installed on the plate 109 fixed to the surface of the color combining prism 101. The plate 109 is fixed to the surface of the color combining prism 101 by, for example, bonding. The plate 109 is fixed to the surface of the color combining prism 101 by adhesion or the like so that it does not move due to the external factors.
Since the display device 108 does not usually have a fixing structure for fixing it to an arbitrary surface, the display device 108 is mounted on the movable sheet metal 106 and mounted on the plate 109 via an adjustment mechanism for adjusting the positional deviation. In this embodiment, the movable sheet metal 106 is mounted on the plate 109 so as to be movable in the X-axis direction and the Y-axis direction by an electrically drivable X-axis driving mechanism 107 and a Y-axis driving mechanism 103. The movable sheet metal 106 and the plate 109 may be formed using a solid material such as metal.

  The X-axis drive mechanism 107 moves the movable sheet metal 106 in the X-axis direction by operating with the electric power supplied from the drive control unit 110. The Y-axis drive mechanism 103 operates the electric power supplied from the drive control unit 110 to move the movable sheet metal 106 in the Y-axis direction. The X-axis drive mechanism 107 and the Y-axis drive mechanism 103 can be realized by a known drive mechanism including a motor or other actuator.

An X-axis pressure sensor 105 for detecting the amount of displacement of the movable sheet metal 106 in the X-axis direction and a Y-axis pressure sensor 104 for detecting the amount of displacement of the movable sheet metal 106 in the Y-axis direction are bonded to the plate 109. It is fixed by each. The X-axis pressure sensor 105 and the Y-axis pressure sensor 104 are an example of a position shift detector. The X-axis pressure sensor 105 and the Y-axis pressure sensor 104 are fixed on the plate 109 by adhesion or the like so that they do not move due to the external factors.
The X-axis pressure sensor 105 and the Y-axis pressure sensor 104 are arranged on the plate 109 so that their output values change when the movable sheet metal 106 moves. As the X-axis pressure sensor 105 and the Y-axis pressure sensor 104, various known pressure sensors such as a piezoelectric type, a gauge type, a capacitance type, and a vibration type can be used. The X-axis pressure sensor 105 and the Y-axis pressure sensor 104 may include a configuration including various pressure sensors and their peripheral circuits such as a temperature compensation circuit.

In the present embodiment, an example in which a pressure sensor is used as the positional deviation detector to detect the positional deviation amount of the movable sheet metal 106 will be described, but a known displacement sensor or position sensor may be used as the positional deviation detector.
The convergence needs to be adjusted to a value equal to or less than a preset allowable value according to the pixel pitch of the display device 108, and the position shift detector needs to detect the position shift of the display device 108 of about several μm. Such a positional shift amount can be detected by a displacement sensor or a position sensor using laser light, for example. However, since displacement sensors and position sensors that use laser light are relatively expensive, use of such a position shift detector causes an increase in the cost of the entire apparatus. On the other hand, when a pressure sensor is used as the position deviation detector, a minute amount of position deviation can be detected using a relatively inexpensive sensor.

  The system control unit 111 acquires the output values of the X-axis pressure sensor 105, the Y-axis pressure sensor 104, and the temperature sensor 102, and performs control for correcting the positional deviation amount of the movable sheet metal 106 generated based on the output values. Output a signal. The system control unit 111 can be realized by an information processing device (computer) including a CPU (Central Processing Unit) that executes processing according to a program and a storage device.

  The drive control unit 110 moves the movable sheet metal 106 by driving the X-axis drive mechanism 107 and the Y-axis drive mechanism 103 in accordance with the control signal output from the system control unit 111. The drive control unit 110 can be realized by various circuits including a power amplifier circuit that supplies required power to a motor and an actuator included in the X-axis drive mechanism 107 and the Y-axis drive mechanism 103. If the system control unit 111 includes a power amplification circuit or the like and can directly drive the X-axis drive mechanism 107 and the Y-axis drive mechanism 103 by supplying required power, the drive control unit 110 may be omitted.

The storage unit 112 stores information necessary for the processing of the system control unit 111, and is used in the convergence correction device of the present invention, which will be described later, including a temperature correction table, a distance information table, a temperature conversion table, a temperature correction formula, and a color synthesizing prism. Various kinds of information such as the thermal expansion coefficients of 101, the movable metal plate 106, and the plate 109, and reference values are stored. The storage unit 112 can be realized by a non-volatile storage device capable of rewriting data, such as a semiconductor memory, a magnetic disk device, or an optical disk device.
Each arrow shown in FIG. 1 shows an example of the direction in which a signal (data) flows, and even if it is shown by a unidirectional arrow, it is excluded that the signal (data) flows in both directions. Not something to do.

Next, the operation of the positional deviation correcting device of the present invention having such a configuration will be described with reference to the drawings.
FIG. 2 is a flowchart showing an example of a processing procedure according to the positional deviation correction method of the present invention. The process shown in FIG. 2 is executed by the system control unit 111 shown in FIG. 1 at preset predetermined cycles (for example, every one minute). The process shown in FIG. 2 may be set to be executed or stopped at an arbitrary timing by the user of the projector or the like.

  It should be noted that it is assumed that the projector has its convergence properly adjusted before shipment at a manufacturing factory, a service center, or the like of the projector. That is, it is assumed that the displacement amount of each display device 108 is adjusted so as to be within a preset allowable value. Further, it is assumed that the output values of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 at this time are stored in the storage unit 112 in association with the output value of the temperature sensor 102 as the respective reference values A.

When the power of the projector is turned on by a user or the like when using the projector, the system control unit 111 starts the positional deviation correction process shown in FIG.
The system control unit 111 first acquires the output values of the temperature sensor 102 (step S1), and also acquires the output values of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 (step S2). Here, the output values acquired from the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 are assumed to be the actual measured values B, respectively.

It is generally known that most of the pressure sensor, the displacement sensor, the position sensor, and the like have an output value having temperature characteristics. Therefore, the system control unit 111 calculates the temperature correction amounts of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 from the output value of the temperature sensor 102 using temperature correction information such as a temperature correction table (step S3).
The temperature correction table may be created from the temperature characteristics of the output values of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104, which are obtained in advance by experiments or the like, and may be stored in the storage unit 112. The temperature correction amount is not limited to the method of calculating using the temperature correction table, and a temperature correction formula derived from the temperature characteristics of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 obtained by experiments or the like is used. You may ask.

Next, the system control unit 111 calculates a temperature correction value E obtained by temperature-correcting the actual measurement value B using the temperature correction amount calculated in step S3 (step S4). The temperature correction of the actually measured value B referred to here means that the actually measured value B is converted into a correction value (temperature correction value E) which is a value obtained at the temperature detected by the temperature sensor 102 when the reference value A is set. Refers to converting. This is a process necessary for comparing the reference value A and the temperature correction value E, which will be described later.
When a sensor that does not have a temperature characteristic in its output value or a configuration in which a temperature-corrected output value is obtained is used as the position shift detector, the process of obtaining the temperature correction value E shown in steps S3 and S4 Is unnecessary. In that case, in the process described below, the actual measurement value B obtained in step S2 may be used instead of the temperature correction value E.

Next, the system control unit 111 reads the reference value A stored in the storage unit 112 (step S5) and compares the temperature correction value E of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 with the reference value A. , And the difference value C between them is calculated (step S6).
For example, when the temperature correction value E is equal to the reference value A, the difference value C is zero (0), which indicates that the display device 108 is in the proper position without moving. On the other hand, when a significant value is obtained as the difference value C, it indicates that the display device 108 is physically moved by the external factor and is displaced from the proper position.
Therefore, the system control unit 111 generates information for correcting the positional deviation of the movable sheet metal 106 indicated by the difference value C, that is, control information D for matching the temperature correction value E and the reference value A (step). S7).

  The control information D is, for example, the output values of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 and the movement amount of the movable sheet metal 106 at the temperature indicated by the output value of the temperature sensor 102 stored in association with the reference value A. It may be generated by using a distance information table showing the relationship with. At this time, the system control unit 111 may obtain the movement amount of the movable sheet metal 106 corresponding to the difference value C from the distance information table, and use the value for returning the position of the movable sheet metal 106 by the movement amount as the control information D. .. The distance information table may be created based on the relationship between the output values of the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 and the moving amount of the movable sheet metal 106, which are obtained in advance by experiments or the like, and may be stored in the storage unit 112.

  Next, the system control unit 111 calculates, from the output value of the temperature sensor 102, the amount of temperature fluctuation of the movable sheet metal 106 that is generated due to the internal factor, that is, the amount of temperature fluctuation that the display device 108 changes depending on the temperature. (Step S8). The temperature variation amount of the display device 108 may be calculated using, for example, temperature conversion information (temperature conversion table) indicating the relationship between the temperature and the variation amount of the display device 108 due to the shape variation of the light modulation block 100. The temperature conversion table may be created in advance based on experiments or the like and stored in the storage unit 112. The amount of temperature variation of the display device 108 is not limited to the method of obtaining the temperature using the temperature conversion table, and if the thermal expansion coefficients of the movable sheet metal 106, the plate 109, the color synthesizing prism 101, etc. are known, those values can be used. It may be determined from the coefficient of thermal expansion.

  For example, a liquid crystal panel used as the display device 108 has a configuration in which liquid crystal molecules are arranged between two substrates on which transparent electrodes are formed, and the property that the orientation of the liquid crystal molecules changes when a voltage is applied between the electrodes. To control the state of light passing through. Therefore, in order that only light (polarized light) vibrating in a specific direction corresponding to the direction of liquid crystal molecules is incident on the liquid crystal panel, a polarizing plate that allows only the polarized light in the specific direction to pass through on the light incident side of the liquid crystal panel. Are placed. Further, in the liquid crystal panel, the direction of the liquid crystal molecules changes depending on the presence or absence of a voltage between the electrodes, so that the vibration direction of the incident polarized light changes along the direction of the liquid crystal molecules. Therefore, on the light emission side of the liquid crystal panel, a polarizing plate that allows only one of the polarized light emitted from the liquid crystal panel having a different vibration direction to pass therethrough is arranged. The liquid crystal panel and the polarizing plates arranged on the light incident side and the light emitting side of the liquid crystal panel are generally integrated. Here, a polarizing plate arranged on the light incident side of the liquid crystal panel is referred to as an “incident side polarizing plate”, and a polarizing plate arranged on the light emitting side is referred to as an “emission side polarizing plate”.

  The incident-side polarization plate and the emission-side polarization plate pass only one polarized light and shield the other polarized light, so the energy of the light shielded by the incident-side polarization plate and the emission-side polarization plate is converted into heat. It That is, in a projector that uses a liquid crystal panel as the display device 108, the incident-side polarization plate and the emission-side polarization plate each generate heat during its operation. Further, in the liquid crystal panel, since a part of the incident light is shielded by the black matrix provided at each pixel boundary, the energy of the shielded light is converted into heat. Therefore, the entire liquid crystal panel generates heat during operation of the projector. In particular, when the projected image is brightened, the amount of light emitted to the liquid crystal panel increases, and the amount of heat generated by the liquid crystal panel increases.

  When the liquid crystal panel which is the display device 108 generates heat, the temperatures of the movable metal plate 106, the plate 109 and the color synthesizing prism 101 to which the display device 108 is attached also rise. Further, the projector is provided with a high-intensity lamp or the like which serves as a light source of irradiation light to the display device 108, and the light source also serves as a heating element. Therefore, when the projector is in operation, the display device 108 generates heat and the light source and the like also generate heat, so that the temperature inside the housing rises.

When a dichroic prism is used as the color synthesizing prism 101, since the dichroic prism has a structure in which a plurality of glasses are bonded, the shape of each heated glass or the adhesive used for bonding the glass is expanded by heat. fluctuate. Further, when the movable sheet metal 106 or the plate 109 is made of a solid material such as metal, the shape of the movable sheet metal 106 or the plate 109 is changed by thermal expansion of the movable sheet metal 106 or the plate 109 which is warmed by the display device 108 generating heat.
When the shape of the color combining prism 101 changes, the convergence of each color light emitted from the color combining prism 101 may shift. Furthermore, if the position of the display device 108 shifts due to the change in the shape of the movable metal plate 106 or the plate 109, the convergence of each color light emitted from the color combining prism 101 shifts.

Therefore, the system control unit 111 obtains the temperature fluctuation amount of the display device 108 at the current temperature detected by the temperature sensor 102 using the temperature conversion table, and determines the position of the display device 108 indicated by the temperature fluctuation amount. Control to return to the position. That is, the system control unit 111 corrects the control information D using the temperature fluctuation amount of the display device 108 calculated in step S8, and outputs the corrected value as the control signal F to the drive control unit 110 (step S9). ). The control signal F may be generated by adding the temperature fluctuation amount of the display device 108 calculated in step S8 to the control information D or by subtracting the temperature fluctuation amount from the control information D.
After outputting the control signal F to the drive control unit 110, the system control unit 111 returns to step S1 and repeats the processes of steps S1 to S9 for each of the predetermined cycles.
The drive control unit 110 that receives the control signal F from the system control unit 111 moves the movable sheet metal 106 by operating the X-axis drive mechanism 107 and the Y-axis drive mechanism 103 according to the control signal F.

In the processing procedure shown in FIG. 2, an example in which the control information D is generated in order to correct the position of the display device 108 moved due to the external factor has been shown, but the display device moved due to the external factor is shown. The position of 108 can be corrected by other methods.
For example, if the system control unit 111 executes feedback control so that the temperature correction value E matches the reference value A, the movable sheet metal 106 can be returned to the position before the movement. In that case, if the reference value A is corrected so as to return from the position indicated by the temperature fluctuation amount of the display device 108 calculated in step S8 to the original position, and the corrected value is output to the drive control unit 110 as the control signal F. Good.

According to this embodiment, the system control unit 111 causes the positional deviation amount of the display device 108 detected by the X-axis pressure sensor 105 and the Y-axis pressure sensor 104 to match the reference value A, and further detects the temperature sensor 102. The display device 108 is moved using the X-axis drive mechanism 107 and the Y-axis drive mechanism 103 so that the position of the display device 108, which varies depending on the temperature, returns to the original position.
Therefore, it is possible to correct the positional deviation of the display device 108 that has moved due to an external factor and also correct the positional deviation of the display device 108 that occurs due to an internal factor.

At this time, according to the present invention, it is not necessary to display a pattern image for adjustment or the like on the screen unlike the inventions described in Patent Documents 2 and 3, so that the convergence is achieved even when the user is projecting a desired image. Can be dynamically corrected.
Therefore, according to the present invention, the positional deviation of the device to be adjusted (display device 108) caused by the external factor and the internal factor can be corrected without using the pattern image for adjustment or the like.

  Although the present invention has been described with reference to the exemplary embodiments, the present invention is not limited to the above exemplary embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

100 Light Modulation Block 101 Color Synthesizing Prism 102 Temperature Sensor 103 Y-Axis Driving Mechanism 104 Y-Axis Pressure Sensor 105 X-Axis Pressure Sensor 106 Movable Sheet Metal 107 X-Axis Driving Mechanism 108 Display Device 109 Plate 110 Drive Control Section 111 System Control Section 112 Storage Section

Claims (6)

Storage part,
A displacement detector that detects the amount of displacement of the device to be adjusted,
A temperature sensor for detecting the temperature of the adjusted block to which the adjusted device is attached,
A drive mechanism for moving the adjusted device in the adjusted block;
The device to be adjusted in which the amount of positional deviation of the device to be adjusted detected by the position deviation detector and a reference value stored in advance in the storage unit match, and fluctuates depending on the temperature detected by the temperature sensor A system control unit that moves the device to be adjusted using the drive mechanism so that the position of
Misregistration correction device. The reference value is an output value of the positional deviation detector when the positional deviation amount of the device to be adjusted is adjusted within a preset allowable value,
The storage unit is
Further storing temperature correction information created in advance from the temperature characteristics of the output value of the position shift detector,
The system control unit,
Using the temperature correction information, the output value of the position shift detector is converted into a temperature correction value which is a value obtained by the temperature detected by the temperature sensor when the reference value is set, and the temperature correction value is converted. The positional deviation correction device according to claim 1, wherein a value and the reference value are matched. The storage unit is
Further storing pre-created temperature conversion information indicating the relationship between the temperature and the amount of position variation of the device to be adjusted,
The system control unit,
3. The misregistration correction device according to claim 1, wherein the position of the device to be adjusted that fluctuates depending on the temperature detected by the temperature sensor is obtained using the temperature conversion information.   The position shift correction device according to claim 1, wherein the position shift detector is a pressure sensor. A positional deviation correction device according to any one of claims 1 to 4,
A display device that is a device to be adjusted,
Projector with. Storage part,
A displacement detector that detects the amount of displacement of the device to be adjusted,
A temperature sensor for detecting the temperature of the adjusted block to which the adjusted device is attached,
A drive mechanism for moving the adjusted device in the adjusted block;
Be prepared,
Computer
The position adjustment amount of the adjustment target device detected by the position deviation detector matches a reference value stored in advance in the storage unit, and the adjustment target device varies depending on the temperature detected by the temperature sensor. A method for correcting a positional deviation in which the device to be adjusted is moved by using the drive mechanism so that the position returns to the original position.

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