KR19980017352A - Convergence auto adjuster of 3-panel projector - Google Patents

Abstract

The present invention relates to an apparatus for automatically adjusting convergence of a three-panel projector, comprising a three-panel type having first to third optical modulation members (22, 28, 32) installed corresponding to the R / G / B color components of a color image signal. The reference screen pattern displayed on the screen 38 by the first AMA panel 22 in the projector and the adjustment screen pattern displayed on the screen 38 by the second and third AMA panels 28 and 32 to be adjusted. To detect the positional deviation between the reference screen pattern and the adjustment color pattern by color filtering the imaging device 40 for imaging the image and the reference screen pattern and the adjustment screen pattern on the screen 38 captured by the imaging device 40. Control unit 60 for executing position adjustment control of the second and third AMA panels 28 and 32 to be adjusted based on the position difference detected by the screen difference detection unit 50 and the color screen difference detection unit 50. Under the control of the control unit 60, the reference screen pattern and the adjustment screen pattern OSD signal processing unit 70 for generating an OSD signal of the OSD, the OSD signal of the reference screen pattern and the adjustment screen pattern is applied to the first to third AMA panels (22, 28, 32) to be displayed on the screen 38 First and second convergences corresponding to the first and third AMA panel drivers 80, 90 and 100 and the second and third AMA panels 28 and 32 to be adjusted under the control of the control unit 60. First and second convergence adjusting units which drive the adjustment mechanisms 120 and 140 to change the horizontal and vertical positions of the second and third AMA panels 28 and 32 to be adjusted so that the reference pattern screen matches the adjustment screen pattern. The reference screen pattern and the adjustment screen pattern displayed on the screen 38 are captured by the imaging device 40 so as to adjust the convergence of the color image automatically.

Description

Convergence auto adjuster of 3-panel projector

The present invention relates to an apparatus for automatically adjusting convergence of a three-panel projector, and more particularly, to capture a color screen pattern of a convergence adjustment target with respect to a reference color screen pattern projected on a screen, and to adjust the captured reference color screen pattern. The present invention relates to an apparatus for automatically adjusting the convergence of a three-panel projector for changing the position of the target color screen pattern so that the convergence of the R / G / B colors projected on the screen is automatically adjusted.

As is well known, an image display device is roughly classified into a direct view type image display device and a projection type image display device, and the direct view type image display device includes an R / G / B color beam emitted from an R / G / B electron gun on a fluorescent panel. The CRT device is configured to reach a R / G / B fluorescent point formed in the lens to realize a color image, while a projection image display device is based on an R / G / B color signal of a color image based on a uniform arrangement of liquid crystals. It is represented by an LCD (Liquid Crystal Display) panel which scatters and projects a color beam onto a screen to reproduce a color image.

However, according to the CRT apparatus, an absolute distance for deflection in the vertical and horizontal directions is required so that the color ratio emitted from the R / G / B electron gun is evenly distributed to the R / G / B fluorescent point on the fluorescent panel. While the overall dimensions and weight become large, the size of the screen is limited.

In addition, according to the LCD panel, since the color image is developed by the light transmission control by the liquid crystal, not only the thinning is possible but also the relatively large screen is reproducible, but the application of the polarizing plate causes light loss. .

Therefore, in recent years, the AMA (Actuated mirror array) device is integrated with the AMA panel, the light ratio emitted from the light source is adjusted based on the R / G / B color component of the color image signal so as to reproduce the color image on the screen. A projector as a projection image display device has been proposed.

Here, an AMA element provided in an AMA panel applicable to a projector is integrated with a substrate and is electrically connected to a pixel driving element made of, for example, a transistor, which is switched by a pixel signal of a color image, and electrically connected to the pixel driving element to correspond to a pixel signal. And an actuator for performing a tilting operation and a reflecting surface formed at an upper end of the actuator to adjust an optical path of a light beam in response to a pixel signal of a color image.

1 is a view showing an optical system of a three-panel projector in which an AMA panel is installed corresponding to an R / G / B signal of a color image.

In the figure, reference numeral 10 denotes a light source for emitting a high brightness white light beam, 12 denotes a condenser lens for condensing the light beam emitted from the light source 10, and 14 denotes a light ratio condensed by the condenser lens 12 Represents a source stop member for shaping the mold into a predetermined form.

16 denotes a reflecting mirror that reflects the light beams shaped by the source stop member 14 into the optical modulation path, and 18 denotes only the R (red) color component in the light beams reflected by the reflecting mirror 16. An R-dichroic filter for reflecting is shown, 20 is a first field lens for condensing a beam of R color components reflected by the R-dichroic filter 18, and 22 is a first field lens 20 1 shows a first AMA panel equipped with a plurality of AMA elements for adjusting an optical path based on the R color component of a color image signal.

In Fig. 1, reference numeral 24 denotes a G-dichroic filter reflecting only G (Green) color component in the light beam passing through the R-dichroic filter 18, and 26 denotes the G-dichro. A second field lens for condensing the beam of the G color component reflected by the wing filter 24, and 28 denotes the beam of the G color component condensed by the second field lens 24 to the G color component of the color image signal. A second AMA panel is provided which is equipped with a plurality of AMA elements for light path control on the basis.

Reference numeral 30 denotes a third field lens for condensing a beam of B (blue) color component in the light beam passing through the G-dichroic filter 24, and 32 denotes the third field lens 30. A third AMA panel is provided with a plurality of AMA elements for adjusting the light path based on the B color component of a color image signal in which the beam of the B color component condensed at is represented.

According to the optical system of the projector having the above-described configuration, the white light beam emitted from the light source 30 is collected by the condensing lens 12 and passes through the source stop member 14 to have a predetermined shape (for example, a spherical shape or a rectangular shape). The light beam is reflected back from the reflecting mirror 16 to reach the R-dichroic filter 18.

Therefore, the beam of the R color component in the light beam is reflected by the R-dichroic filter 18 and is incident on the first AMA panel 22 through the first field lens 20, and the first AMA panel 22. ) Is reflected by the AMA element tilted in response to the R color component of the color image signal, and the reflected light is reflected by the R-component through the first field lens 20. The dichroic filter 18 is reflected toward the projection lens 36.

In addition, in the light beam reflected by the reflection mirror 16 and passed through the R-dichroic filter 18, the G color component is reflected by the G-dichroic filter 24 and the second field lens 26 Is incident on the second AMA panel 28, and the second AMA panel 28 tilts the AMA element corresponding to the G color component of the color image signal with respect to the beam of the incident G color component. The optical path is adjusted, and the beam of the G-color component controlled by the optical path is reflected from the G-dichroic filter 24 to the projection lens 36 through the second field lens 26.

In addition, the B color component passing through the R-dichroic filter 18 and the G-dichroic filter 24 in the reflection mirror 16 passes through the third AMA panel 32 through the third field lens 30. ), And the optical path is adjusted to correspond to the B color component of the color image signal and then reflected to the projection lens 36 through the third field lens 30.

Accordingly, the beam of the R / G / B color component reflected through the R-dichroic filter 18, the G-dichroic filter 24, and the third field lens 30 is reflected in the reflection mirror 16. And the projection stop member 34 enter the projection lens 36, and as the projection lens 36 is projected onto the screen 38, a color image is projected onto the screen 38.

Here, the first to third AMA panels 22, 28, and 32 as the light adjusting member are usually fixed to the case of the projector by a fixing panel member (not shown), and in this state, for example, the first to third AMA panels 22, 28, and 32 are fixed. When the R / G / B color beams, which are optically modulated by the 3AMA panels 22, 28, and 32, are displaced from each other, the convergence of the color images projected on the screen is not matched, and thus the overall color image quality is reduced. It will deteriorate.

Therefore, when the positions of the R / G / B color beams that are optically modulated by the first to third AMA panels 22, 28 and 32 are not matched, the case of the projector is disassembled and the first to third AMA panels ( The position relative to 22, 28, 32 must be adjusted so that the R / G / B color beams coincide with each other, but are projected onto the screen 38 by such first-third AMA panels 22, 28, 32. It is not easy to adjust the position for adjusting the convergence of the color image.

Accordingly, the present invention has been made in view of the above circumstances, and the reference color screen pattern projected on the screen and the color screen pattern to be adjusted are applied by applying an electric positioning mechanism to the three-plate type AMA panel employed in the projector. Convergence of a three-panel projector to automatically adjust the position of the color screen pattern to be adjusted with respect to the reference color screen pattern so that the convergence of the R / G / B color of the color image projected on the screen is optimally adjusted. The purpose is to provide an automatic adjustment device.

In order to achieve the above object, according to a preferred embodiment of the present invention, in the three-panel projector having the first to third AMA panels installed corresponding to the R / G / B color components of the color image signal, the first AMA panel Image pickup means for picking up the reference screen pattern displayed on the screen by the screen and the adjustment screen pattern displayed on the screen by the second and third AMA panels to be adjusted, and the reference screen pattern on the screen picked up by the imaging means; Color screen difference detection means for detecting the positional deviation between the reference screen pattern and the adjustment color pattern by color filtering the adjustment screen pattern, and the second and third AMAs of the adjustment target based on the positional deviation detected by the color screen difference detection means. Control means for executing position adjustment control of the panel, OSD signal processing means for generating OSD signals of the reference screen pattern and the adjustment screen pattern under the control of the control means; A first to third AMA panel driving means for applying the OSD signals of the reference screen pattern and the adjustment screen pattern to the first to third AMA panels so as to be displayed on the screen, and a second to be adjusted under the control of the control means; And changing the horizontal and vertical positions of the second and third AMA panels to be adjusted so that the reference pattern screen and the adjustment screen pattern coincide with each other by driving the first and second convergence adjustment mechanisms corresponding to the third AMA panel. There is provided a convergence automatic adjustment device for a three-panel projector which is equipped with first and second convergence adjustment means.

Preferably, in accordance with the present invention, the first and second convergence adjusting mechanisms each have a set of guide protrusions formed at the rear end while the AMA panel of the corresponding adjustment target is fixedly installed, and the bottom surface thereof is fixed at an inclined angle. A panel member, the fixed panel member being freely mounted on the upper surface thereof, and on the opposite end surface thereof, a vertical positioning member having gear teeth formed thereon, a positioning support panel which is movably coupled to a set of guide protrusions formed on the fixed panel member; And a first electric motor coupled to the shaft end of the first gear engaged with the gear teeth formed in the vertical positioning member, and performing a position change in the vertical direction with respect to the AMA panel to be adjusted.

Preferably, the vertical positioning member is formed so as to correspond to the inclination angle of the lower end surface of the fixed panel member so that the width of one end and the other end is different, and a guide protrusion is formed at the rear end thereof to correspond to the positioning support panel. It is coupled to the guide projection guide formed in the to act as the fixed panel member is displaced in the vertical direction while moving in the horizontal direction in accordance with the rotation of the first electric motor.

The first and second convergence adjustment mechanisms may include guide guides formed at a lower end of the positioning support panel and coupled to a guide member formed on a bottom surface of a corresponding projector, and horizontal gears formed at a lower front surface of the positioning support panel. The second gear is engaged with the horizontal gear train of the position adjusting support panel at the teeth and the shaft end, and has a second electric motor for changing the position in the horizontal direction with respect to the optical modulation member to be adjusted.

Preferably, the reference screen pattern is set to a '+' shape or a circular shape by an R color, and the adjustment screen pattern is set to a '+' shape or a circular shape by a G color and a B color.

According to the convergence automatic adjustment device for a three-panel projector according to the present invention having the above-described configuration, a mechanism for adjusting convergence is installed on a fixed panel for holding the first to third AMA panels and projected on the screen under the control of the control means. The image adjusting means is configured to capture the reference color screen pattern by the first AMA panel and the adjustment screen pattern by the second and third AMA panels by the image pickup means to compensate for the positional deviation of the adjustment screen pattern with respect to the reference color screen pattern. The position is automatically changed so that the convergence of the R / G / B colors of the color image projected on the screen is optimally adjusted.

1 is a view showing a configuration example of an optical system applied to a general three-panel projector,

Figure 2 is a block diagram of a convergence automatic adjustment device of a three-panel projector according to the present invention,

3 is a view showing an installation state of the imaging device shown in FIG.

4 is a view showing a representative configuration of the first and second convergence adjustment mechanism shown in FIG.

5 is a view showing a screen pattern for explaining the operation of the automatic convergence adjustment device of a three-panel projector according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: light source, 22, 28, 32: first-third light modulation member (AMA panel),

36: projection lens, 38: screen,

40: imaging device, 50: color screen difference detection unit,

60: control unit, 70: OSD signal processing unit,

80,90,100: 1st-3rd AMA panel driver,

110, 130: the first and second convergence adjustment unit,

120,140: first and second convergence adjustment mechanisms,

152: vertical positioning member, 154: positioning support panel,

158: first electric motor, 168: horizontal gear train,

172: second electric motor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of the automatic convergence adjustment device of a three-panel projector according to the present invention. Reference numeral 40 denotes a reference color screen pattern displayed on a screen (reference numeral '38' in FIG. 1) and an adjustment target. An imaging device comprising, for example, a charge coupled device (CCD) camera for imaging a color screen pattern, the imaging device 40 being positioned at a predetermined position (illustrated in FIG. 3) in front of a corresponding projector, through a projection lens 36. The imaging of the color image projected on the screen 38 is performed.

50 denotes a color screen difference detection unit for filtering and separating the color components of the reference color screen pattern picked up by the imaging device 40 and the color screen pattern to be adjusted, and detecting the positional deviation of the color screen. In the present invention, the color screen difference detection unit 50 projects the reference screen pattern on the screen 38 in a '+' shape or a circular shape by the R color, and the adjustment screen pattern having a shape corresponding to the reference screen pattern. R color filtering and G color based on the image screen of the R color reference screen pattern and G color adjustment screen pattern picked up by the imaging device 40 when sequentially projected on the screen by the G color and the B color Filtering is performed to detect the positional deviation RG of the color screen, and is based on the image screen of the R color reference screen pattern and the B color adjustment screen pattern picked up by the imaging device 40. R color filtering and B color filtering are performed to detect the position deviation (R-B) of the color screen.

In FIG. 2, reference numeral 60 denotes the color screen difference detection unit when the convergence adjustment mode is set by the remote controller while controlling the overall function of the corresponding projector in response to a remote control signal set by a remote controller (not shown), for example. A control unit for controlling the convergence adjustment mode based on the deviations RG and RB of the color screen applied at 50 is shown.

Reference numeral 70 forms a reference screen pattern (reference '+' shaped pattern in the present invention) by the reference R color in the adjustment mode of convergence executed under the control of the control unit 60, and Whenever the G color button 42 and the B color button 44 are operated, the adjustment screen pattern by the G color and the adjustment screen pattern by the B color of the shape corresponding to the reference screen pattern are used as the OSD (On-screen display) signals. The generated OSD signal processor.

Reference numerals 80, 90, and 100 denote reference screen patterns of R / G / B colors generated by the OSD signal processing unit 70 by driving the first to third AMA panels 22, 28, and 32 described with reference to FIG. And a first to third AMA panel driver for adjusting the adjustment screen pattern so that the light path is adjusted and displayed on the screen.

Reference numeral 110 is set through the first convergence adjustment mechanism 120 according to the convergence adjustment control signal of the G color applied from the control unit 60 in response to the operation of the G color adjustment button 42 of the remote controller 40. 2 shows a first convergence adjustment unit for performing position adjustment for the 2AMA panel (reference numeral 28 in FIG. 1).

Also, reference numeral 130 designates the second convergence adjustment mechanism 140 in accordance with the convergence adjustment control signal of the B color applied from the controller 60 in response to the operation of the B color adjustment button 44 of the remote controller 40. A second convergence adjustment unit for performing position adjustment for the third AMA panel (reference numeral 32 in Fig. 1) is shown.

4 shows a representative representation of the first convergence adjustment mechanism 120 with respect to the first and second convergence adjustment mechanisms 120 and 140. According to the convergence adjustment mechanism 120, the second AMA panel 28 is coupled. A set of guide protrusions 150 is formed at the rear of the fixed panel member 28 'to be fixed, and the bottom surface of the fixed panel member 28' is inclined at a predetermined angle. In addition, the lower end surface of the fixed panel member 28 'has a width corresponding to the inclination angle of the fixed panel member 28', and the fixed panel member 28 'is freely mounted on the upper surface thereof and the opposite end surface thereof. The vertical position adjusting member 152 is provided with a gear teeth.

In addition, as for the fixed panel member 28 ', the positioning support panel 154 is provided in the case of the corresponding projector, and the front side of the positioning support panel 154 has the position of the fixing panel member 28'. A set of guide members 156 is formed at a position corresponding to the set of guide protrusions 150 formed at the rear side.

Further, on the positioning support panel 154, the bottom surface of the vertical positioning member 152 is vertically convergent with respect to the G color adjustment screen pattern (that is, the adjustment screen pattern by the second AMA panel 28). A first electric motor 158 for adjustment is installed, and a first gear 160 engaged with the gear teeth of the vertical positioning member 152 is installed at the shaft end of the first electric motor 158.

In addition, a guide protrusion 162 is formed on the bottom surface of the positioning support panel 154, and the guide protrusion 162 is horizontal to the guide member 166 formed on the case bottom 164 of the corresponding projector. The horizontal gear row 168 is formed so as to be movable in the direction, and the lower front surface of the positioning support panel 154 contributes to the horizontal convergence adjustment of the color image.

In addition, a front side of the positioning support panel 154 on which the horizontal gear train 168 is formed is provided with a second electric motor for overall horizontal movement of the positioning support panel 154 when the horizontal convergence adjustment of the color image is performed. 170 is installed, and the second gear 172 meshed with the horizontal gear train 168 is engaged with the shaft end of the second electric motor 170.

In addition, a guide protrusion 174 is formed at a rear end of the vertical positioning member 152, and the guide protrusion 174 is horizontally formed at a portion of the positioning support panel 154 corresponding to the guide protrusion 174. Guide protrusion guide portion 176 is coupled to be movable in the direction.

Preferably, according to the present invention, the configuration of the first convergence adjustment mechanism 120 is similarly applied to the second convergence adjustment mechanism 140 so that the first convergence adjustment mechanism 120 adjusts the convergence of the G color. When acting for the second convergence adjustment mechanism 140 serves to adjust the convergence of the B color.

Subsequently, the operation of the automatic convergence adjustment device of the three-plate type liquid crystal projector according to the present invention having the above-described configuration is assumed based on the R color, and set in detail as the G color and B color convergence adjustment targets.

First, a set of guide protrusions 150 formed at the rear of the fixed panel member 28 'to which the second AMA panel 28 is fixedly coupled in the fixed panel of the first AMA panel 22 shown in FIG. ) Is coupled to a set of guide members 156 formed on the positioning support panel 154, and a lower surface having a constant inclination angle of the fixed panel member 28 ′ is adjusted by the guide protrusion 174. It is mounted on the upper surface of the vertical positioning member 152 that is horizontally coupled to the guide protrusion guide 176 of the support panel 154.

In addition, for the gear teeth formed on the lower surface of the vertical positioning member 152, the first gear 160 coupled to the shaft end of the first electric motor 158 fixed on the positioning support panel 154 is Are matched.

In addition, the positioning support panel 154 is coupled to the guide protrusion 162 formed at its lower end so as to be movable to the guide member 166 formed on the case bottom 164 of the projector corresponding to the positioning support panel ( The second electric motor 170 is positioned so that the horizontal gear train 168 and the second gear 172 formed on the lower front surface of the 154 mesh with each other, and the configuration thereof is the same for the third AMA panel 32. To be applied.

In this state, when the convergence adjustment mode is set from the remote controller, the controller 60 controls the OSD signal processor 70 so that, for example, a '+' shape or a circular reference screen pattern is formed through the first AMA panel driver 80. It is applied to the first AMA panel 22, so that the light beam of the light source 10 is adjusted to the optical path in the first AMA panel 22 to be projected on the screen 38 through the projection lens 36. (See Figure 5).

In addition, the controller 60 generates an adjustment screen pattern with the same color as the reference screen pattern as the first adjustment target color by the OSD processing unit 70 to generate the second AMA panel driver 90. Is applied to the second AMA panel 28 so that the light beam of the light source 10 is modulated by the second AMA panel 28 and projected onto the screen 38 through the projection lens 36 ( See FIG. 5).

Subsequently, the controller 60 captures the reference screen pattern of the R color projected on the screen 38 and the adjustment screen pattern of the G color to be adjusted through the imaging device 40 installed in front of the corresponding projector. The color image signal captured by the imaging device 40 is applied to the color screen difference detection unit 50.

Therefore, the color screen difference detection unit 50 filters the R color component from the color image of the R color reference screen pattern and the G color screen pattern to be adjusted, and also filters the G color component to filter the R color pattern and G. The result RG of the positional deviation of the color pattern is applied to the controller 60.

Accordingly, the controller 60 is configured to position the G color screen pattern of the adjustment target with the reference screen pattern of the R color based on the difference signal of the RG color screen applied by the color screen difference detection unit 50. The convergence adjustment data is generated and applied to the first convergence adjustment unit 110.

Accordingly, the first convergence adjustment unit 110 analogizes the convergence adjustment data to the first electric motor 158, and when the first electric motor 158 rotates forward / reverse, the first The first gear 160 installed at the shaft end of the electric motor 158 drives the gear teeth formed on the bottom surface of the vertical positioning member 152 in the horizontal direction, and thus the vertical positioning member 152 is The guide protrusion 174 is horizontally moved in a state where the guide protrusion 174 is guided by the guide protrusion guide 176 of the positioning support panel 154. By the horizontal movement of the vertical positioning member 152, the fixed panel member 28 'depends on the inclination angle of the lower end surface thereof so that the set of guide protrusions 150 are guide members of the positioning support panel 154. Displaced in the vertical direction under the guidance of 156.

Therefore, the adjustment target screen pattern of the G color projected on the screen 38 through the projection lens 36 by adjusting the optical path in the second AMA panel 28 by moving the position of the fixed panel 28 'in the vertical direction. The position is changed in the vertical direction.

Subsequently, in response to the horizontal convergence adjustment data for horizontal position adjustment of the second AMA panel 28 provided by the controller 60, the first convergence adjustment unit 110 performs the convergence to the second electric motor 170. The control voltage is applied by the analog processing of the adjustment data. Accordingly, the second gear 172 at the end of the shaft rotates by the rotation of the second electric motor 170, and is formed on the positioning support panel 154. The horizontal gear train 168 is driven.

Accordingly, the positioning support panel 154 is moved in a horizontal direction while the guide protrusion 162 formed on the bottom surface thereof is guided by the guide member 166 formed on the bottom surface of the case body 164. The G color adjustment screen pattern projected on the screen 38 by being optically modulated in the second AMA panel 28 is aligned with the reference screen pattern of the R color.

Subsequently, in the state in which the reference screen pattern of R color is projected on the screen 38, the controller 60 displays the adjustment screen pattern of B color having the same shape as the reference screen pattern as the second adjustment target color. The light beam of the light source 10 is optically modulated in the third AMA panel 32 by being generated by the OSD processing unit 70 and applied to the third AMA panel 32 through the third AMA panel driver 100. And projected onto screen 38 via 36.

Subsequently, the control unit 60 controls to capture the reference color pattern of the R color projected on the screen 38 and the B color screen pattern of the adjustment target through an image pickup device installed in front of the corresponding projector. The color image signal picked up by the imaging device 40 is applied to the color screen difference detection unit 50. Therefore, the color screen difference detection unit 50 filters the R color component from the color image of the R color reference screen pattern and the B color screen pattern to be adjusted, and also filters the B color component, thereby filtering the R color pattern and B. The result RB of the positional deviation of the color pattern is applied to the controller 60.

Accordingly, the controller 60 is configured to position the B color screen pattern of the adjustment target with the reference screen pattern of the R color based on the difference signal of the RB color screen applied by the color screen difference detection unit 50. The convergence adjustment data is generated and applied to the second convergence adjustment unit 130.

Accordingly, the second convergence adjustment unit 130 analogizes the convergence adjustment data and applies the same to the second convergence adjustment mechanism 140. Accordingly, the second convergence adjustment mechanism 120 is identical to the first convergence adjustment mechanism 120 shown in FIG. 4. By the operation of the second convergence adjustment mechanism 14 configured as described above, the adjustment screen pattern of the B color is aligned with the reference screen pattern of the R color, and thus the convergence of the color image is optimally adjusted.

On the other hand, the above description has been made on the assumption that the R color is set as the color of the reference screen pattern. However, the G and B colors may be set as the reference screen pattern, and the first and second convergence adjusting mechanisms may be used. Of course, if the positional movement of the AMA panel in the horizontal and vertical directions is possible with respect to 120 and 140, any configuration may be applied.

In addition, although the present invention has been described with respect to a state in which the present invention is applied to a projector having a three-panel AMA panel, the present invention can be equally applied to a projector equipped with a three-panel LCD panel, as well as a projection television. This can also be applied to rear projection (Rear projection TV).

As described above, according to the apparatus for automatically adjusting the convergence of the three-panel projector according to the present invention, the reference screen pattern by the reference color and the adjustment screen pattern by the color of the adjustment target are displayed on the screen as the OSD signal, Color image of the screen pattern and the adjustment screen pattern is picked up by the image pickup device to detect the positional deviation between the reference screen pattern and the adjustment screen pattern and automatically adjust the position of the AMA panel so that the deviation is corrected. Can be adjusted.

Claims (5)

In a three-plate type projector having first to third light modulation members (22, 28, 32) installed corresponding to the R / G / B color components of a color image signal, The reference screen pattern displayed on the screen 38 by the first AMA panel 22 and the adjustment screen pattern displayed on the screen 38 by the second and third AMA panels 28 and 32 to be adjusted are captured. An imaging means 40, Color screen difference detection means 50 for detecting the positional deviation between the reference screen pattern and the adjustment color pattern by color filtering the reference screen pattern and the adjustment screen pattern on the screen 38 picked up by the imaging means 40, Control means 60 for performing position adjustment control of the second and third AMA panels 28 and 32 to be adjusted based on the positional deviation detected by the color screen difference detecting means 50, OSD signal processing means 70 for generating OSD signals of the reference screen pattern and the adjustment screen pattern under the control of the control means 60, First to third AMA panel driving means (80, 90, 100) for applying the OSD signals of the reference screen pattern and the adjustment screen pattern to the first to third AMA panels (22, 28, 32) to be displayed on the screen (38). ), Under the control of the control means 60, the first and second convergence adjusting mechanisms 120 and 140 corresponding to the second and third AMA panels 28 and 32 to be adjusted are driven to drive the reference pattern screen. And a first and second convergence adjusting means (110,130) for changing the horizontal and vertical positions of the second and third AMA panels (28,32) to be adjusted so that the adjustment screen pattern is matched. Automatic convergence control of the projector. According to claim 1, wherein the first and second convergence adjustment mechanism (120,140) is a fixed set of the guide projections (150) at the rear end and the bottom surface is fixed while the AMA panel of the corresponding adjustment target is fixed, respectively The fixed panel member 28 ', which is inclined at an angle, and the fixed panel member 28' are freely mounted on the top surface, and the vertical position adjusting member 152 having gear teeth formed on the opposite end surface thereof; 28 ') a positioning support panel 154 formed with a guide member 156 to which a set of guide protrusions 150 formed to be movably coupled, and gear teeth and teeth formed on the vertical positioning member 152 at the shaft end thereof. And a first electric motor 158 coupled to the first gear 160 to perform a position change in the vertical direction with respect to the AMA panel to be adjusted. Device. According to claim 2, wherein the vertical positioning member 152 is formed with a different width of one end and the other end corresponding to the inclination angle of the bottom surface of the fixed panel member 28 ', the guide projection 174 at the rear end Is formed and coupled to the guide protrusion guide 176 correspondingly formed on the positioning support panel 154 to move in the horizontal direction according to the rotation of the first electric motor 158 and the fixed panel member 28. ') Is a position adjustment in the vertical direction convergence automatic adjustment device for a three-panel projector. The method of claim 1, wherein the first and second convergence adjustment mechanism (120,140) is formed on the lower end of the positioning support panel 154 is coupled to the guide member 166 formed on the bottom surface 164 of the corresponding projector. A guide gear 162, a horizontal gear train 168 formed on the lower front surface of the positioning support panel 154, and a second gear engaged with the horizontal gear train 168 of the positioning support panel 154 at the shaft end. Gear (172) is provided, the second electric motor 170, the convergence automatic adjustment device, characterized in that configured to be equipped with a second electric motor 170 for changing the position of the horizontal direction relative to the light modulation member of the adjustment target. The method according to any one of claims 1 to 4, wherein the reference screen pattern is set to a '+' shape or a circular shape by an R color, and the adjustment screen pattern is a '+' shape by a G color and a B color. Or the convergence automatic adjustment device for a three-panel projector, characterized in that the circular setting.