JP2017129704A - Display device, projector, and control method of display device - Google Patents

Abstract

An object of the present invention is to easily generate correction data for correcting an image based on a captured image obtained by capturing a display surface, and to suitably process the image using the generated correction data. An adjustment image generation unit 183 for generating adjustment image data, a correction control unit 184 for causing a second image processing unit 165 to process the adjustment image data and display it on a display unit 110, and an adjustment image data On the other hand, when the processing by the first image processing unit 161 is not performed and the processing by the second image processing unit 165 is performed, based on the captured image of the image displayed on the screen SC, the second image processing unit 165 and a correction data generation unit 185 that generates the second correction data used in the processing by the projector 100 . [Selection drawing] Fig. 2

Description

  The present invention relates to a display device, a projector, and a display device control method.

  Conventionally, a technique is known in which a projection image projected by a projection unit is captured by an imaging device, and the projection image is corrected based on the captured image (for example, see Patent Document 1). The image processing system of Patent Literature 1 corrects image distortion and color unevenness based on imaging information of an imaging unit.

JP 2005-124133 A

By the way, a display device is known in which a plurality of display modes are prepared in advance, and a function for performing correction according to a selected display mode on an image and displaying the corrected image is known. . The display mode is a mode for adjusting the image quality of the displayed image in accordance with the type of image and viewing environment. In such a display device, when a correction value is generated using a captured image, it is necessary to separately generate correction data for each of a plurality of display modes, and the processing may be complicated.
The present invention has been made in view of the above circumstances, and easily generates correction data for correcting an image based on a captured image obtained by imaging a display surface, and appropriately processes the image using the generated correction data. With the goal.

In order to achieve the above object, the display device of the present invention corrects an input unit for inputting image data and image data input from the input unit, and does not perform corrected image data or correction. A first correction unit that outputs image data, a second correction unit that corrects and outputs image data output from the first correction unit, and an image based on the image data output from the second correction unit is displayed on the display surface. A display unit to display, an adjustment image generation unit that generates adjustment image data, a correction control unit that causes the second correction unit to correct the adjustment image data, and displays the adjustment image data; and the adjustment image When the data is not corrected by the first correction unit and is corrected by the second correction unit, the data is corrected by the second correction unit based on the captured image of the image displayed on the display surface. Correction used for correction Characterized in that it comprises a correction data generator for generating an over data, the.
According to the present invention, the correction data can be generated based on the captured image of the adjustment image data that has not been corrected by the first correction unit. Therefore, for example, even when the first correction unit includes a plurality of correction patterns for image data, correction data that is not affected by the correction pattern can be generated. For this reason, it is possible to easily generate correction data for correcting the image based on the captured image obtained by imaging the display surface, and to appropriately process the image using the generated correction data.

According to the present invention, in the display device, the first correction unit includes at least a color conversion unit that performs color conversion on the image data, and the second correction unit corrects color unevenness that corrects color unevenness of the image data. And a gamma correction unit that performs gamma correction on the image data.
According to the present invention, when the correction data is generated, a captured image is generated based on the adjustment image data that has not undergone color conversion, and the correction data is generated based on the captured image. For this reason, it is possible to generate correction data based on color characteristics specific to the display device that do not depend on the display image quality preset in the display device.

In the display device according to the aspect of the invention, the first correction unit includes a color conversion unit that performs color conversion on image data, and a shape correction unit that corrects the shape of the image, and the second correction unit includes: A color unevenness correction unit that corrects color unevenness of image data and a gamma correction unit that performs gamma correction on the image data are provided.
According to the present invention, when the correction data is generated, the color conversion is not performed, and the captured image is generated based on the adjustment image data that is not subjected to the shape correction, and the correction data is generated based on the captured image. Is generated. For this reason, it is possible to generate correction data based on color characteristics specific to the display device that do not depend on the display image quality preset in the display device. Further, since the shape of the adjustment image data is not corrected, it is possible to prevent generation of correction data and generation of a region of image data that cannot be corrected.

According to the present invention, in the display device, the color unevenness correction unit includes a first color unevenness correction unit that corrects color unevenness of image data using correction data generated in advance, and the correction data generation unit. And a second color unevenness correction unit that corrects the color unevenness of the image data using the generated correction data.
According to the present invention, it is possible to add color unevenness correction based on correction data generated based on a captured image and suitable for the use environment of the display device while applying color unevenness correction prepared in advance.

In the display device, the correction data generation unit generates a plurality of correction data corresponding to gamma correction values used for correction by the gamma correction unit.
According to the present invention, it is possible to generate a plurality of correction data corresponding to gamma correction values. Accordingly, correction corresponding to a plurality of correction patterns of the gamma correction unit can be performed by the second color unevenness correction unit.

Further, according to the present invention, in the display device, the correction data generation unit captures an image displayed on the display surface with a captured value of a captured image captured at the time of previous generation of correction data as a target value. Correction data for correcting an image pickup value to the target value is generated.
According to the present invention, the correction data for correcting the captured value of the captured image of the image displayed on the display surface to the target value, using the captured value of the captured image captured at the time of the previous generation of the correction data as the target value. Is generated. Therefore, it is possible to easily generate correction data capable of correcting aging deterioration.

The display device may further include an accepting unit that accepts an input, and the correction data generating unit may change the generated correction data according to the input accepted by the accepting unit. .
According to the present invention, the correction data can be changed according to the input received by the receiving unit. Therefore, it is possible to generate correction data more suitable for the use environment.

In the display device according to the aspect of the invention, the correction data generation unit includes the storage unit, and the correction data generation unit generates the correction data according to the correction data generated by the correction data generation unit and the input received by the reception unit. The update data for changing the value of is stored in a separate area of the storage unit.
According to the present invention, the correction data generated by the correction data generation unit and the correction data changed according to the input received by the reception unit are stored in separate areas of the storage unit. Therefore, when the adjustment image data displayed on the display surface is imaged and correction data is newly generated, only the correction data stored in the first storage unit can be updated.

Further, the present invention is the display device, wherein the correction data generation unit is a case where the correction data generated by the correction data generation unit is changed according to an input received by the reception unit, When the correction data generation unit newly generates correction data, whether or not to apply the change according to the input received by the reception unit to the correction data to be newly generated is input to the reception unit. It is characterized by changing accordingly.
According to the present invention, when image data for adjustment displayed on the display surface is captured and correction data is newly generated, changes made to the previous correction data are newly generated as correction data. It can be selected whether or not to apply.

The projector of the present invention corrects an image pickup unit, an input unit for inputting image data, and image data input from the input unit, and outputs corrected image data or uncorrected image data. A first correction unit that performs correction, a second correction unit that corrects and outputs the image data output from the first correction unit, a projection unit that projects an image based on the image data output from the second correction unit, and an adjustment An adjustment image generation unit that generates image data for correction, a correction control unit that causes the second correction unit to correct the adjustment image data, and displays the adjustment image data on the display unit. When correction by the correction unit is not performed and correction by the second correction unit is performed, an image projected by the projection unit is used for correction by the second correction unit based on a captured image captured by the imaging unit. Correction Characterized in that it comprises a correction data generator for generating an over data.
According to the present invention, the correction data can be generated based on the captured image of the adjustment image data that has not been corrected by the first correction unit. Therefore, for example, even when the first correction unit includes a plurality of correction patterns for image data, correction data that is not affected by the correction pattern can be generated. For this reason, it is possible to easily generate correction data for correcting an image based on a captured image obtained by capturing the projected image, and to appropriately process the image using the generated correction data.

According to the display device control method of the present invention, an input unit for inputting image data, image data input from the input unit is corrected, and image data after correction or uncorrected image data is output. A first correction unit that performs correction, a second correction unit that corrects and outputs image data output from the first correction unit, and a display unit that displays an image based on the image data output from the second correction unit on a display surface A method of controlling a display device comprising: a step of generating adjustment image data; a step of correcting the generated adjustment image data by the second correction unit; and a correction by the second correction unit A step of displaying an image based on the adjusted image data on the display surface, and the correction by the first correction unit is not performed on the adjustment image data, and the correction by the second correction unit is performed. Case , Based on the captured image of the image displayed on the display surface, characterized by a step of generating correction data used in correction by the second correcting unit.
According to the present invention, the correction data can be generated based on the captured image of the adjustment image data that has not been corrected by the first correction unit. Therefore, for example, even when the first correction unit includes a plurality of correction patterns for image data, correction data that is not affected by the correction pattern can be generated. For this reason, it is possible to easily generate correction data for correcting the image based on the captured image obtained by imaging the display surface, and to appropriately process the image using the generated correction data.

The block diagram of a projector. The block diagram of a control part and an image process part. The flowchart which shows operation | movement of a control part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram illustrating a configuration of the projector 100.
The projector 100 is connected to an external image supply device 200 such as a personal computer or various video players, and projects an image based on an image signal supplied from the image supply device 200 onto a projection target.
For example, a video playback device, a DVD (Digital Versatile Disk) playback device, a TV tuner device, a CATV (Cable television) set top box, a video output device such as a video game device, a personal computer, or the like is used as the image supply device 200. be able to.
The projection target may be an object that is not uniformly flat, such as a building or an object, or may have a flat projection surface such as a screen SC or a wall surface of a building. In this embodiment, the case where it projects on the plane screen SC (display surface) is illustrated.

The projector 100 includes an image input interface unit (hereinafter abbreviated as an image input I / F unit) 151. The image input I / F unit 151 includes a connector for connecting a cable and an interface circuit (both not shown), and inputs an image signal supplied from the image supply device 200 connected by the cable. The image input I / F unit 151 converts the input image signal into image data and outputs the image data to the image processing unit 160. The image input I / F unit 151 corresponds to the “input unit” of the present invention.
The interface provided in the image input I / F unit 151 may be a data communication interface such as Ethernet (registered trademark), IEEE 1394, USB, or the like. Further, the interface of the image input I / F unit 151 may be an interface for image data such as MHL (registered trademark), HDMI (registered trademark), and DisplayPort.
Further, the image input I / F unit 151 may include a VGA terminal to which an analog video signal is input and a DVI (Digital Visual Interface) terminal to which digital video data is input as a connector. Further, the image input I / F unit 151 includes an A / D conversion circuit. When an analog video signal is input via the VGA terminal, the analog video signal is converted into image data by the A / D conversion circuit. A configuration of outputting to the processing unit 160 may be possible.

  The projector 100 includes a display unit 110 that forms an optical image and projects (displays) the image on the screen SC. The display unit 110 includes a light source unit 111, a light modulation device 112, and a projection optical system 113. The display unit 110 corresponds to the “projection unit” of the present invention.

  The light source unit 111 includes a light source such as a xenon lamp, an ultra high pressure mercury lamp, an LED (Light Emitting Diode), or a laser light source. The light source unit 111 may include a reflector and an auxiliary reflector that guide light emitted from the light source to the light modulation device 112. Further, the light source unit 111 includes a lens group for increasing the optical characteristics of the projection light, a polarizing plate, a light control element that reduces the amount of light emitted from the light source on the path to the light modulation device 112 (both shown) Abbreviation) may be provided.

  The light source unit 111 is driven by the light source driving unit 121. The light source driving unit 121 is connected to the internal bus 190. The light source driving unit 121 turns on and off the light source of the light source unit 111 under the control of the control unit 180.

  The light modulation device 112 includes, for example, three liquid crystal panels corresponding to the three primary colors of red (R), green (G), and blue (B). The light emitted from the light source unit 111 is separated into three color lights of RGB and is incident on the corresponding liquid crystal panel. The three liquid crystal panels are transmissive liquid crystal panels, and modulate the transmitted light to generate image light. The image light modulated by passing through each liquid crystal panel is combined by a combining optical system such as a cross dichroic prism and emitted to the projection optical system 113.

A light modulation device driving unit 122 is connected to the light modulation device 112. The light modulator driving unit 122 is connected to the internal bus 190.
The light modulation device driving unit 122 generates display image signals corresponding to R, G, and B colors based on display image data (described later) input from the image processing unit 160. The light modulation device driving unit 122 drives the liquid crystal panels of each color of the light modulation device 112 based on the generated display image signals of R, G, and B, and draws image light on each liquid crystal panel.

  The projection optical system 113 includes a lens group that projects the image light modulated by the light modulation device 112 onto the screen SC and forms an image on the screen SC. Further, the projection optical system 113 may include a zoom mechanism for enlarging / reducing an image projected on the screen SC (hereinafter referred to as a projected image) and adjusting the focus, and a focus adjusting mechanism for adjusting the focus.

The projector 100 includes an operation panel 131 and an input processing unit 133. The input processing unit 133 is connected to the internal bus 190. The operation panel 131 and the input processing unit 133 correspond to the “accepting unit” of the present invention.
The operation panel 131 functioning as a user interface has various operation keys and a display screen composed of a liquid crystal panel. When the operation key displayed on the operation panel 131 is operated, the input processing unit 133 outputs data corresponding to the operated key to the control unit 180. Further, the input processing unit 133 displays various images on the display screen of the operation panel 131 under the control of the control unit 180.
In addition, a touch sensor that detects contact with the operation panel 131 is superimposed on the display screen of the operation panel 131 to be integrally formed. The input processing unit 133 detects the position of the operation panel 131 touched by the user's finger or the like as the input position, and outputs data corresponding to the detected input position to the control unit 180.

The projector 100 also includes a remote control light receiving unit 132 that receives an infrared signal transmitted from the remote control 5 used by the user. The remote control light receiving unit 132 is connected to the input processing unit 133. The remote control 5 and the remote control light receiving unit 132 correspond to the “accepting unit” of the present invention.
The remote control light receiving unit 132 receives an infrared signal transmitted from the remote control 5. The input processing unit 133 decodes the infrared signal received by the remote control light receiving unit 132, generates data indicating the operation content in the remote control 5, and outputs the data to the control unit 180.

The projector 100 includes an imaging unit 140.
The imaging unit 140 includes a camera having an imaging optical system, an imaging element, an interface circuit, and the like. The imaging unit 140 includes a color filter, for example, an RGB filter, and an imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) is installed at a position where light transmitted through the filter forms an image. The The imaging range of the imaging unit 140, that is, the angle of view is a range including the screen SC and its peripheral part. The imaging unit 140 outputs the generated captured image data to the control unit 180.

  The projector 100 includes a wireless communication unit 145. The wireless communication unit 145 is connected to the internal bus 190. The wireless communication unit 145 includes an antenna (not shown), an RF (Radio Frequency) circuit, and the like, and performs wireless communication with an external device under the control of the control unit 180. The wireless communication method of the wireless communication unit 145 is, for example, a wireless LAN (Local Area Network), Bluetooth (registered trademark), UWB (Ultra Wide Band), near field communication methods such as infrared communication, or wireless using a cellular phone line A communication method can be adopted.

  The projector 100 includes an image processing system. The image processing system is configured around a control unit 180 that controls the entire projector 100 in an integrated manner. In addition, the image processing unit 160, a frame memory 155, a first parameter storage unit 171, and a second parameter storage unit 172 are provided. The third parameter storage unit 173 and the nonvolatile storage unit 175 are provided. The control unit 180, the image processing unit 160, the first to third parameter storage units 171 to 173, and the nonvolatile storage unit 175 are connected to the internal bus 190.

  The image processing unit 160 expands the image data input from the image input I / F unit 151 in the frame memory 155 under the control of the control unit 180, and executes image processing on the expanded image data. Image processing executed by the image processing unit 160 includes, for example, color conversion, shape correction, color unevenness correction, gamma correction, and the like. The image processing unit 160 can also perform image processing other than these, for example, resolution conversion (scaling) processing, frame rate conversion processing, zoom processing, and luminance correction processing, and combining these image processing It is of course possible to do this. The detailed configuration of the image processing unit 160 will be described with reference to FIG.

  The first parameter storage unit 171, the second parameter storage unit 172, and the third parameter storage unit 173 may be configured by a volatile memory such as DRAM or SRAM, or may be configured by a flash memory or a nonvolatile memory such as an EEPROM. It may be configured. In the present embodiment, a case where the first to third parameter storage units 171 to 173 are configured by a volatile memory will be described.

The first parameter storage unit 171 includes first correction data (correction data) used by a first color unevenness correction unit 168 (see FIG. 2) described later for color unevenness correction, and a gamma correction unit 167 described later for gamma correction. The gamma correction value to be stored is stored as a parameter. The control unit 180 reads the first correction data and the gamma correction value from the non-volatile storage unit 175 when the OS is activated, and stores the first correction data and the gamma correction value in the first parameter storage unit 171.
The first correction data and the gamma correction value are data prepared when the projector 100 is manufactured, and a plurality of the first correction data and the gamma correction value are prepared according to the display mode of the projector 100. The display mode is a mode for adjusting the image quality of the displayed image in accordance with the type of image and viewing environment. The display mode includes, for example, “dynamic” suitable for viewing that emphasizes gradation expression in a dark part in a bright environment, “living” suitable for viewing in a dim light, and “suitable for watching a movie in a dark environment”. “Theatre”, “Photo” suitable for projecting still images such as photographs in a bright environment, “Presentation” suitable for presentation using color materials in a bright environment, “Game” suitable for playing games in a bright environment Mode.
The first correction data can also be changed by the user's operation on the operation panel 131 or the remote controller 5. In this case, the first correction data itself prepared at the time of manufacturing the projector 100 may be stored in the nonvolatile storage unit 175 without any change, and the copy of the first correction data may be changed.

  The second parameter storage unit 172 stores, as a parameter, second correction data (correction data) used by the second color unevenness correction unit 166 (see FIG. 2), which will be described later, for color unevenness correction. The control unit 180 reads the second correction data from the nonvolatile storage unit 175 when the OS is activated, and stores the second correction data in the second parameter storage unit 172. The second correction data is correction data generated based on captured image data obtained by capturing an adjustment image projected on the screen SC. The adjustment image will be described later. Further, the second correction data can be changed by the operation of the operation panel 131 or the remote controller 5 by the user.

The third parameter storage unit 173 stores parameters (hereinafter referred to as color conversion parameters) used by the color conversion unit 162 (see FIG. 2), which will be described later, for color conversion. The control unit 180 reads the color conversion parameter from the non-volatile storage unit 175 when the OS is activated, and stores it in the third parameter storage unit.
The color conversion parameters are data prepared when the projector 100 is manufactured, and a plurality of color conversion parameters are prepared according to the display mode of the projector 100. Further, this color conversion parameter can be changed by the operation of the operation panel 131 of the user or the operation of the remote controller 5. In this case, the color conversion parameter itself prepared at the time of manufacturing the projector 100 may be stored in the nonvolatile storage unit 175 without any change, and the color conversion parameter copy may be changed.

The non-volatile storage unit 175 includes a non-volatile memory such as a flash memory or an EEPROM, or a hard disk drive (HDD). The non-volatile storage unit 175 stores data processed by the control unit 180 and a control program executed by the control unit 180 in a non-volatile manner. Further, the nonvolatile storage unit 175 stores setting values for various processes executed by the image processing unit 160 and a table referred to by the control unit 180.
Furthermore, the non-volatile storage unit 175 stores pattern image data projected on a projection target such as the screen SC when generating the second correction data. The pattern image data is, for example, a lattice pattern, and is image data in which predetermined marks are formed at the four corners of the pattern image data. The predetermined marks are used when detecting the four corners of the pattern image data.

  The control unit 180 includes hardware such as a CPU, a ROM, and a RAM (all not shown). The ROM is a nonvolatile storage device such as a flash ROM, and stores a control program and data. The RAM constitutes a work area of the CPU. The CPU expands the control program read from the ROM or the nonvolatile storage unit 175 in the RAM, and executes the control program expanded in the RAM to control each unit of the projector 100.

  The control unit 180 includes a projection control unit 181, an imaging control unit 182, an adjustment image generation unit 183, a correction control unit 184, and a correction data generation unit 185 as functional blocks. These functional blocks are realized by the CPU executing a control program stored in the ROM or the nonvolatile storage unit 175.

  The projection control unit 181 performs image projection onto the screen SC. For example, the projection control unit 181 controls the light source driving unit 121 to turn on the light source of the light source unit 111 and adjust the luminance of the light source. As a result, the light source emits light and the image light modulated by the light modulation device 112 is projected onto the screen SC by the projection optical system 113.

The imaging control unit 182 causes the imaging unit 140 to perform imaging, and acquires captured image data generated by the imaging unit 140.
In addition, when the acquired captured image data is data obtained by capturing pattern image data described later, the imaging control unit 182 outputs the captured image data to the correction control unit 184 as it is. In addition, when the acquired captured image data is data obtained by capturing an adjustment image, which will be described later, the imaging control unit 182 calculates the pixel value of each pixel constituting the captured image data in the XYZ color space of the CIE 1931 standard color system. The XYZ value is converted and output to the correction control unit 184.

  When the adjustment image generation unit 183 receives an instruction for image quality adjustment from the operation panel 131 or the remote controller 5, the adjustment image generation unit 183 generates adjustment image data. The adjustment image data is, for example, a raster image of each color of R, G, and B, and the adjustment image generation unit 183 generates adjustment image data for each of a plurality of preset gradations.

The correction control unit 184 controls the first image processing unit 161 and the second image processing unit 165 to control image processing performed by the image processing unit 160 on the image data. The image data includes adjustment image data generated by the adjustment image generation unit 183 in addition to the image data input from the image input I / F unit 151.
When the image control unit 184 receives image data from the image input I / F unit 151, the correction control unit 184 causes the first image processing unit 161 and the second image processing unit 165 to perform correction. At this time, the correction control unit 184 may read parameters necessary for processing by the first image processing unit 161 and the second image processing unit 165 from the nonvolatile storage unit 175 and output them to the image processing unit 160.
The correction control unit 184 accepts an image quality adjustment instruction from the operation panel 131 or the remote controller 5, and when the adjustment image generation unit 183 generates adjustment image data, the adjustment image data is sent to the first image processing unit 161. It outputs to the 2nd image process part 165, without outputting. That is, the adjustment image generation unit 183 outputs the adjustment image data to the second image processing unit 165 without causing the first image processing unit 161 to correct the adjustment image data.

The correction data generation unit 185 is used for correction by the second image processing unit 165 based on captured image data obtained by capturing an image (hereinafter referred to as an adjustment image) based on the adjustment image data projected on the screen SC. 2 correction data is generated. The correction data generation unit 185 generates second correction data when the adjustment image data is not corrected by the first image processing unit 161 but is corrected by the second image processing unit 165.
The correction data generation unit 185 corrects the image quality of the image projected on the screen SC to the set target value for image quality adjustment based on the captured image data of the adjustment image projected on the screen SC. Is generated. The target value of image quality adjustment is, for example, captured image data captured by the imaging unit 140 at the previous image quality adjustment, and captured image data obtained by capturing an adjustment image of the same color and the same gradation. Set based on the value. The target value can be a value obtained from captured image data. Specifically, the pixel value (XYZ value) at the center of the captured image data can be used. For example, it may be a target value (XYZ value) when gamma correction is performed. The target value may be a preset color coordinate value.

FIG. 2 is a diagram illustrating a configuration of the image processing unit 160. 2 shows data lines for transmitting and receiving data. Control signal lines for connecting the control unit 180 (particularly, the correction control unit 184) to the first image processing unit 161 and the second image processing unit 165 are shown. Illustration is omitted.
The image processing unit 160 includes a first image processing unit 161 and a second image processing unit 165. The first image processing unit 161 includes a color conversion unit 162 and a shape correction unit 163. The second image processing unit 165 includes a second color unevenness correction unit 166, a gamma correction unit 167, and a first color unevenness correction unit 168. The first image processing unit 161 corresponds to a “first correction unit” of the present invention, and the second image processing unit 165 corresponds to a “second correction unit” of the present invention.

Image data is input from the image input I / F unit 151 to the color conversion unit 162. The color conversion unit 162 is connected to the third parameter storage unit 173 and the frame memory 155.
The color conversion unit 162 develops the image data input from the image input I / F unit 151 in the frame memory 155. The color conversion unit 162 reads color conversion parameters corresponding to the display mode notified from the correction control unit 184 from the third parameter storage unit 173. The color conversion unit 162 performs color conversion on the image data expanded in the frame memory 155 using the read color conversion parameter. For example, the color conversion unit 162 performs color conversion so that the luminance of the image data is maximized or converts the image data into image data corresponding to a color space such as sRGB according to the display mode.

The shape correction unit 163 receives the image data color-converted by the color conversion unit 162. The shape correction unit 163 is connected to the frame memory 155 and develops the image data input by the color conversion unit 162 in the frame memory 155.
The shape correction unit 163 converts the shape of the image data according to the correction parameter input from the control unit 180, and corrects the shape of the image projected on the screen SC.

The second color unevenness correction unit 166 receives the image data whose shape has been corrected by the shape correction unit 163. The second color unevenness correction unit 166 is connected to the second parameter storage unit 172 and the frame memory 155.
The second color unevenness correction unit 166 reads the second correction data from the second parameter storage unit 172, and corrects the color unevenness of the image data developed in the frame memory 155 using the read second correction data.
Further, when the adjustment image data generated by the adjustment image generation unit 183 is input, the second color unevenness correction unit 166 performs gamma correction without performing color unevenness correction on the input adjustment image data. To the unit 167.

The gamma correction unit 167 receives the image data corrected by the second color unevenness correction unit 166. The gamma correction unit 167 is connected to the first parameter storage unit 171 and the frame memory 155.
The gamma correction unit 167 develops the image data input from the second color unevenness correction unit 166 in the frame memory 155. The gamma correction unit 167 reads the gamma correction value corresponding to the display mode notified from the correction control unit 184 from the first parameter storage unit 171. The gamma correction unit 167 performs gamma correction on the image data developed in the frame memory 155 using the read gamma correction value.

The first color unevenness correction unit 168 receives the image data corrected by the gamma correction unit 167. In addition, a first parameter storage unit 171 and a frame memory 155 are connected to the first color unevenness correction unit 168.
The first color unevenness correction unit 168 develops the image data input from the gamma correction unit 167 in the frame memory 155. The first color unevenness correction unit 168 reads the first correction data corresponding to the display mode notified from the correction control unit 184 from the first parameter storage unit 171, and uses the read first correction data in the frame memory 155. Corrects uneven color in the developed image data.
The first color unevenness correction unit 168 has the same configuration as the second color unevenness correction unit 166. The first color unevenness correction unit 168 and the second color unevenness correction unit 166 are different in the number of pixels of image data to be subjected to color unevenness correction. The first color unevenness correction unit 168 has a larger number of pixels that perform color unevenness correction than the second color unevenness correction unit 166.
In addition, the first color unevenness correction unit 168 and the second color unevenness correction unit 166 have different correction data used for color unevenness correction. The first correction data used by the first color unevenness correction unit 168 for color unevenness correction is correction data prepared for each display mode of the projector 100 when the projector 100 is manufactured. The second correction data used by the second color unevenness correction unit 166 for color unevenness correction is generated according to the use environment of the user, which is generated based on the captured image data obtained by capturing the adjustment image projected on the screen SC. Corrected data.

FIG. 3 is a flowchart showing the operation of the control unit 180.
The control unit 180 monitors the input from the input processing unit 133 and determines whether an input for instructing the start of image quality adjustment has been received (step S1). In the case of a negative determination (step S1 / NO), if another instruction is input, the control unit 180 performs a process according to the input instruction and returns to the determination in step S1. When the determination is affirmative (step S1 / YES), the control unit 180 reads the pattern image data from the nonvolatile storage unit 175 and causes the image processing unit 160 to process the pattern image data. The image processing unit 160 develops and processes the input pattern image data in the frame memory 155, and outputs the processed pattern image data to the display unit 110 as display image data. The display unit 110 projects an image (hereinafter referred to as a pattern image) based on the input display image data (pattern image data) onto the screen SC (step S2).

The image quality adjustment instructed here is an adjustment for correcting the deterioration of the image quality of the projection image projected on the screen SC and returning it to the image quality at the time of manufacturing the projector 100. For example, since the characteristics of the light source included in the light source unit 111 change due to temperature change, aging deterioration, and the like, it is necessary to correct the light amount so that a desired image luminance can be obtained.
In addition to the image quality adjustment provided in the projector 100, in addition to this, image quality adjustment for correcting the color tone of the projected image to a preset color tone by correcting the hue of the screen SC or the ambient illumination, or a plurality of projectors 100. There are image quality adjustments and the like that match the hues of the projected images projected by. For these image quality adjustments, correction data can be generated by the same procedure as described below.

  When the pattern image is projected onto the screen SC, the imaging control unit 182 controls the imaging unit 140 to image the screen SC direction, and generates captured image data (step S3). The imaging control unit 182 outputs the generated captured image data to the correction control unit 184.

Based on the input captured image data, the correction control unit 184 associates coordinates in the captured image data (hereinafter referred to as imaging coordinates) with coordinates on the liquid crystal panel of the light modulation device 112 (hereinafter referred to as panel coordinates) ( Step S4).
The correction control unit 184 detects the mark of the pattern image captured in the captured image data, identifies the positions of the four corners of the pattern image captured in the captured image data, and identifies the pixel positions of the four corners in the captured image data. Further, the correction control unit 184 specifies the pixel position of the liquid crystal panel where the mark formed in the pattern image data is developed, and associates the pixel position in the captured image data with the pixel position in the liquid crystal panel. Thereby, an imaging coordinate and a panel coordinate are matched.
The pixel position of the liquid crystal panel where the mark formed in the pattern image data is developed is set in advance, for example, and the correction data generation unit 185 indicates the pixel position of the liquid crystal panel where the mark is developed from the nonvolatile storage unit 175. Information may be acquired.
Further, when the image processing unit 160 develops the pattern image in the frame memory 155, the pixel position of the liquid crystal panel is specified based on the pixel position of the frame memory 155 where the mark is developed, and the pixel position of the liquid crystal panel is indicated. Information may be output to the control unit 180. Information that associates the pixels of the frame memory 155 with the pixels of the liquid crystal panel is prepared in advance and is stored in the nonvolatile storage unit 175, for example.

When the imaging coordinates and the panel coordinates are associated with each other, the correction control unit 184 instructs the adjustment image generation unit 183 to generate adjustment image data. The correction control unit 184 designates the color and gradation of the adjustment image data to be generated, and instructs the adjustment image generation unit 183 to generate the adjustment image data. The adjustment image generation unit 183 generates color and gradation adjustment image data designated by the correction control unit 184.
The adjustment image data generated by the adjustment image generation unit 183 is input to the second color unevenness correction unit 166 of the image processing unit 160 under the control of the correction control unit 184. That is, the adjustment image data is input to the second color unevenness correction unit 166 of the second image processing unit 165 without being processed by the first image processing unit 161.

The second color unevenness correction unit 166 outputs the input adjustment image data to the gamma correction unit 167 without performing correction. A display mode instruction is input from the correction control unit 184 to the gamma correction unit 167 and the first color unevenness correction unit 168.
The gamma correction unit 167 reads a gamma correction value corresponding to the display mode designated by the correction control unit 184 from the first parameter storage unit 171 and performs gamma correction on the input adjustment image data. Further, the first uneven color correction unit 168 reads out the first correction data corresponding to the display mode designated by the correction control unit 184 from the first parameter storage unit 171 and corrects the input adjustment image data for uneven color. .

  The adjustment image data corrected by the gamma correction unit 167 and the first color unevenness correction unit 168 is output to the light modulation device driving unit 122 as display image data. The light modulator driving unit 122 generates R, G, and B display image signals based on the input display image data, and drives the corresponding liquid crystal panel of the light modulator 112. Thereby, an image based on the display image signal (that is, adjustment image data) is drawn on the liquid crystal panel, and is projected onto the screen SC by the projection optical system 113 (step S5).

When the adjustment image is projected onto the screen SC, the correction control unit 184 instructs the imaging control unit 182 to generate captured image data. The imaging control unit 182 controls the imaging unit 140 to capture the screen SC direction, and generates captured image data (step S6). The imaging control unit 182 converts the pixel value of each pixel constituting the generated captured image data into an XYZ value in the XYZ color space and outputs the XYZ value to the correction control unit 184. The captured image data converted into the XYZ value is hereinafter referred to as “captured image data (XYZ value)”.
The correction control unit 184 stores the captured image data (XYZ values) input from the imaging control unit 182 in the nonvolatile storage unit 175.

  Next, the correction control unit 184 generates adjustment image data for all colors of R, G, and B with all gradations, and determines whether or not the captured image data is generated by projecting the image data on the screen SC. (Step S7). In the case of negative determination (step S7 / NO), the correction control unit 184 changes the color and gradation of the adjustment image data generated by the adjustment image generation unit 183, and generates the adjustment image data generated. The adjustment image based on is projected onto the screen SC. Then, the correction control unit 184 causes the imaging control unit 182 to generate captured image data (XYZ value) obtained by capturing the adjustment image.

When the determination in step S7 is affirmative (step S7 / YES), the correction control unit 184 instructs the correction data generation unit 185 to generate the second correction data.
The correction data generation unit 185 reads the captured image data (XYZ values) generated for each color and gradation from the nonvolatile storage unit 175, and generates second correction data for each color and gradation (step S8). ).
The nonvolatile storage unit 175 stores captured image data (XYZ values) generated at the previous image quality adjustment. The correction data generation unit 185 corrects the captured image data (XYZ value) generated by the current image quality adjustment using a value obtained from the captured image data (XYZ value) generated at the previous image quality adjustment as a target value. 2 correction data is generated. The target value can be, for example, the center pixel value (XYZ value) of the captured image data. For example, it may be a target value (XYZ value) when gamma correction is performed. The target value may be a preset color coordinate value.

Further, when the second correction data is calculated, the correction data generation unit 185 determines whether or not the calculated second correction data is valid data.
For example, the correction data generation unit 185 obtains a difference between the second correction data calculated last time and the second correction data calculated this time, and when the obtained difference is larger than a first threshold value set in advance. Determines that the second correction data calculated this time is invalid. The correction data generation unit 185 also calculates this time when the difference between the second correction data calculated last time and the second correction data calculated this time is smaller than the second threshold value set in advance. It is determined that the second correction data is invalid. The first threshold value is a threshold value that is larger than the second threshold value.
If the correction data generation unit 185 determines that the calculated second correction data is valid correction data, the correction data generation unit 185 stores the obtained second correction data in the second parameter storage unit 172 (step S9).

  In this flowchart, the case where the second correction data corresponding to one display mode is generated will be described. However, a plurality of second correction data may be generated according to the display mode provided in the projector 100. That is, according to the display mode, the gamma correction value used for correction by the gamma correction unit 167 and the first correction data used for correction by the first color unevenness correction unit 168 are changed to correspond to the display mode provided in the projector 100. A plurality of second correction data are generated.

  When the second correction data is generated and stored in the second parameter storage unit 172, the control unit 180 starts supplying the image signal and waits until the image signal is input. When no image signal is input from the image supply device 200 (step S10 / NO), the control unit 180 waits for processing until an image signal is input. When the supply of the image signal by the image supply device 200 is started (step S10 / YES), the control unit 180 causes the image input I / F unit 151 to convert the input image signal into image data, thereby performing image processing. Output to the unit 160.

  When the supply of the image signal is started, the correction control unit 184 displays the display mode that has been received in advance by operating the operation panel 131 or the remote controller 5 as the color conversion unit 162 and the gamma correction unit 167 of the image processing unit 160. The first color unevenness correction unit 168 is notified.

  The image processing unit 160 first processes the image data input from the image input I / F unit 151 by the first image processing unit 161 (step S11). Specifically, the color conversion unit 162 reads the color conversion parameter corresponding to the display mode notified from the correction control unit 184 from the third parameter storage unit 173, and in accordance with the read color conversion parameter, the image input I / F unit The image data input from 151 is color-converted. The shape correction unit 163 performs shape correction on the image data color-converted by the color conversion unit 162, and outputs the corrected image data to the second image processing unit 165.

The second image processing unit 165 further processes the image data processed by the first image processing unit 161 (step S12).
Specifically, the second color unevenness correction unit 166 reads the second correction data stored in the second parameter storage unit 172, and corrects the color unevenness of the image data whose shape has been corrected by the shape correction unit 163.
The gamma correction unit 167 reads a gamma correction value corresponding to the display mode notified from the correction control unit 184 from the first parameter storage unit 171, and an image input from the second color unevenness correction unit 166 by the read gamma correction value. Gamma-correct the data.
The first color unevenness correction unit 168 reads the first correction data corresponding to the display mode notified from the correction control unit 184 from the first parameter storage unit 171, and is input from the gamma correction unit 167 by the read first correction data. Correct image data.
The first color unevenness correction unit 168 outputs the image data corrected for color unevenness to the light modulation device driving unit 122 of the display unit 110 as display image data.

  The display unit 110 generates R, G, and B display image signals based on the display image data input by the light modulation device driving unit 122, and the corresponding color liquid crystal of the light modulation device 112 by the generated display image signal. Drive the panel. Thereby, image light is drawn on the liquid crystal panel of each color. The display unit 110 projects and displays the image light drawn on each liquid crystal panel on the screen SC by the projection optical system 113 (step S13).

  Although the case where the second correction data is generated by all the pixels of the captured image data has been described in the flowchart described above, the second correction data may be generated for each predetermined pixel of the captured image data. In this case, the pixel for which the second correction data is not generated can be calculated by linear interpolation using the value of the adjacent pixel for which the second correction data has been calculated.

  The second correction data stored in the second parameter storage unit 172 can be changed and finely adjusted by a user operation. For example, a grid pattern is displayed on the operation panel 131, and the user selects a grid point for changing the value of the second correction data by using a button or the like on the operation panel 131. It is also possible to select all lattice points of the lattice pattern at once. In addition, a change amount for changing the value of the second correction data is input by the operation panel 131 or the remote controller 5 at the selected grid point or all grid points. The correction control unit 184 causes the second parameter storage unit 172 to store, as change data (update data), a data set in which the input change amount is associated with the position information of the lattice point to be changed.

  The grid pattern displayed on the operation panel 131 may be formed so that the number of grid points constituting the grid pattern is smaller than the number of second correction data generated by the correction data generation unit 185 for each predetermined pixel. When the grid point of the grid pattern is selected by the user, the value of the second correction data of the pixel that coincides with the selected grid point (hereinafter referred to as the selected pixel) is changed based on the change amount input from the user In addition, the values of the second correction data may be changed for the pixels around the selected pixel by a change amount corresponding to the distance from the selected pixel.

  In addition, in the second correction data generated based on the captured image data of the imaging unit 140, an error may occur due to sensitivity variation of the imaging unit 140 or the like. Since this error is an error that repeatedly occurs, the second correction data that is generated based on the captured image data and the change data that changes the value of the second correction data are stored in different values in the second parameter storage unit 172. It may be stored in a storage area. Thus, when the second correction data is generated again, it is possible to save the user from changing the updated second correction data again by updating only the second correction data. Further, a storage unit that stores the second correction data and a storage unit that stores the change data may be provided respectively.

  Further, when the second correction data is generated, the change data may be taken over, and whether to apply the change data to the newly generated second correction data or to delete the change data may be selected. When the user instructs generation of the second correction data, the user operates the operation panel 131 or the remote controller 5 to delete the change data or to continue applying the change data to the newly generated second correction data. Select.

  In addition, when the second correction data is generated again and the second correction data is updated, the second correction data is periodically generated and updated, and the second correction data is updated by the user operating the operation panel 131 or the remote controller 5. 2 correction data may be generated. Only when the second correction data is periodically updated, the change data can be applied to update the value of the second correction data.

  As described above, the correction data generation unit 185 of the embodiment to which the display device and the control method for the display device of the present invention are applied does not perform the processing by the first image processing unit 161 on the adjustment image data, and the second When processing by the image processing unit 165 is performed, second correction data is generated based on the captured image data. Therefore, even when the color conversion unit 162 of the first image processing unit 161 performs color conversion with a plurality of patterns corresponding to the display mode, second correction data that is not affected by the color conversion of the color conversion unit 162 is generated. can do. Therefore, the second correction data for correcting the image can be easily generated based on the captured image obtained by capturing the screen SC, and the image can be suitably processed using the generated second correction data.

The first image processing unit 161 includes at least a color conversion unit 162 that performs color conversion on the image data. The second image processing unit 165 includes a first color unevenness correction unit 168 that corrects color unevenness in the image data, and A gamma correction unit 167 that performs gamma correction on the image data.
Therefore, when the second correction data is generated, a captured image is generated based on the adjustment image data that has not undergone color conversion, and correction data is generated based on the captured image. Therefore, the second correction data can be generated based on the color characteristics unique to the projector 100 that do not depend on the display mode set in advance for the projector 100.

  The first image processing unit 161 includes a shape correction unit 163 that corrects the shape of the image in addition to the color conversion unit 162. Therefore, since the shape of the adjustment image data is not corrected, it is possible to prevent generation of correction data and generation of an image data area that cannot be corrected.

  Further, the projector 100 serves as the color unevenness correction unit, the first color unevenness correction unit 168 that corrects the color unevenness of the image data using correction data generated in advance, and the correction data generated by the correction data generation unit 185. And a second color unevenness correction unit 166 that corrects the color unevenness of the image data. Accordingly, the color unevenness correction prepared in advance is performed by the first color unevenness correction unit 168, and further the color unevenness correction based on the correction data generated based on the captured image and suitable for the environment in which the projector 100 is used is the second. The color unevenness correction unit 166 can perform this.

  Further, the correction data generation unit 185 generates a plurality of correction data corresponding to the gamma correction values used by the gamma correction unit 167 for correction. Therefore, the second color unevenness correction unit 166 can perform correction corresponding to the plurality of correction patterns of the gamma correction unit 167.

  In addition, the correction data generation unit 185 corrects the captured value of the captured image of the image displayed on the screen SC to the target value using the captured value of the captured image captured at the time of the previous generation of the correction data as the target value. The correction data to be generated is generated. Therefore, it is possible to easily generate correction data capable of correcting aging deterioration.

  The projector 100 also includes an operation panel 131 and a remote controller 5 that receive user operations. The correction data generation unit 185 changes the value of the generated second correction data according to the input received by the operation panel 131 or the remote controller 5. Therefore, it is possible to generate second correction data that is more suitable for the user's usage environment.

  Further, the second correction data generated by the correction data generation unit 185 and the change data changed according to the input received by the operation panel 131 or the remote controller 5 are stored in separate storage areas of the second parameter storage unit 172. The Therefore, when the correction data generation unit 185 newly generates the second correction data, only the second correction data can be updated.

  Further, when the second correction data is newly generated, the user can select whether or not to apply the change data for the second correction data generated last time to the second correction data to be newly generated.

The above-described embodiment is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.
For example, in the above-described embodiment, the projector 100 as the display device includes the imaging unit 140. However, the projector 100 may not include the imaging unit 140. For example, the projector 100 may generate captured image data captured by an imaging device provided outside the projector 100 and generate second correction data.

In the above-described embodiment, the second color unevenness correction unit 166 is provided separately from the first color unevenness correction unit 168, and the second color unevenness correction unit 166 generates the second correction data generated by the correction data generation unit 185. The case where correction was performed using the above was shown. However, the configuration may be such that only the first color unevenness correction unit 168 is provided as a block for performing color unevenness correction, and the second color unevenness correction unit 166 is not provided.
In this case, the first uneven color correction unit 168 newly generates correction data in which the second correction data is reflected in the first correction data, and performs uneven color correction on the image data based on the generated correction data. The first color unevenness correction unit 168 generates a copy of the first correction data when reflecting the second correction data in the first correction data, and reflects the second correction data in the generated copy. New correction data may be generated. Since the first correction data is prepared in advance and preset in the projector 100, the first correction data that has not been changed is also stored in the nonvolatile storage unit 175 as it is so that the projector 100 can be returned to the initial state. It is good to keep it.

  In the above-described embodiment, the light modulation device 112 that modulates the light emitted from the light source has been described by taking as an example a configuration using three transmissive liquid crystal panels corresponding to RGB colors. The invention is not limited to this. For example, a configuration using three reflective liquid crystal panels may be used, or a method in which one liquid crystal panel and a color wheel are combined may be used. Alternatively, a system using three digital mirror devices (DMD), a DMD system combining one digital mirror device and a color wheel, or the like may be used. When only one liquid crystal panel or DMD is used as the light modulation device, a member corresponding to a synthetic optical system such as a cross dichroic prism is unnecessary. In addition to the liquid crystal panel and the DMD, any light modulation device capable of modulating light emitted from the light source can be employed without any problem.

In the above-described embodiment, the front projection type projector 100 that projects from the front of the screen SC is shown as the projector 100, but the present invention is not limited to this.
Moreover, each function part shown in FIG.1 and FIG.2 shows a functional structure, and a specific mounting form is not restrict | limited in particular. That is, it is not always necessary to mount hardware corresponding to each function unit individually, and it is of course possible to adopt a configuration in which the functions of a plurality of function units are realized by one processor executing a program. In addition, in the above embodiment, a part of the function realized by software may be realized by hardware, or a part of the function realized by hardware may be realized by software. In addition, the specific detailed configuration of each other part of the projector 100 can be arbitrarily changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 5 ... Remote control (reception part), 100 ... Projector, 110 ... Display part (projection part), 111 ... Light source part, 112 ... Light modulation apparatus, 113 ... Projection optical system, 121 ... Light source drive part, 122 ... Light modulation apparatus drive 131 ... Operation panel (reception unit), 132 ... Remote control light receiving unit (reception unit), 133 ... Input processing unit (reception unit), 140 ... Imaging unit, 145 ... Wireless communication unit, 151 ... Image input I / F unit ( (Input unit), 155 ... frame memory, 160 ... image processing unit, 161 ... first image processing unit (first correction unit), 162 ... color conversion unit, 163 ... shape correction unit, 165 ... second image processing unit (first) 2 correction unit), 166 ... second color unevenness correction unit, 167 ... gamma correction unit, 168 ... first color unevenness correction unit, 171 ... first parameter storage unit, 172 ... second parameter storage unit, 173 ... third parameter Memory DESCRIPTION OF SYMBOLS 175 ... Nonvolatile memory | storage part, 180 ... Control part, 181 ... Projection control part, 182 ... Imaging control part, 183 ... Adjustment image generation part, 184 ... Correction control part, 185 ... Correction data generation part, 190 ... Internal bus, 200: Image supply device, SC: Screen.

Claims (11)

An input unit for inputting image data;
A first correction unit that corrects image data input from the input unit and outputs corrected image data or image data that has not been corrected;
A second correction unit that corrects and outputs the image data output by the first correction unit;
A display unit for displaying an image based on the image data output by the second correction unit on a display surface;
An image generator for adjustment that generates image data for adjustment;
A correction control unit that causes the second correction unit to correct the adjustment image data and causes the display unit to display the correction image data;
Based on the captured image of the image displayed on the display surface when the adjustment image data is not corrected by the first correction unit and is corrected by the second correction unit, A correction data generation unit that generates correction data used for correction by the two correction units;
A display device comprising: The first correction unit includes at least a color conversion unit that performs color conversion on image data,
The display device according to claim 1, wherein the second correction unit includes a color unevenness correction unit that corrects color unevenness of the image data and a gamma correction unit that performs gamma correction on the image data. The first correction unit includes a color conversion unit that performs color conversion on image data, and a shape correction unit that corrects the shape of the image,
The display device according to claim 1, wherein the second correction unit includes a color unevenness correction unit that corrects color unevenness of the image data and a gamma correction unit that performs gamma correction on the image data.   The color unevenness correction unit includes a first color unevenness correction unit that corrects color unevenness of image data using correction data generated in advance, and color data of image data using correction data generated by the correction data generation unit. The display device according to claim 2, further comprising a second color unevenness correction unit that corrects unevenness.   The display device according to claim 2, wherein the correction data generation unit generates a plurality of correction data corresponding to gamma correction values used for correction by the gamma correction unit.   The correction data generation unit corrects the captured value of the captured image of the image displayed on the display surface to the target value with the captured value of the captured image captured at the time of the previous generation of correction data as the target value. 6. The display device according to claim 1, wherein correction data to be generated is generated. It has a reception unit that accepts input,
The display device according to claim 1, wherein the correction data generation unit changes the generated correction data in accordance with an input received by the reception unit. A storage unit,
The correction data generation unit displays the correction data generated by the correction data generation unit and update data that changes the value of the correction data according to the input received by the reception unit in separate areas of the storage unit. The display device according to claim 7, wherein the display device is stored.   The correction data generation unit is a case where the correction data generated by the correction data generation unit is changed according to an input received by the reception unit, and the correction data generation unit newly generates correction data. In this case, whether to apply the change according to the input received by the reception unit to the newly generated correction data is changed according to the input received by the reception unit. Item 9. The display device according to Item 7 or 8. An imaging unit;
An input unit for inputting image data;
A first correction unit that corrects image data input from the input unit and outputs corrected image data or image data that has not been corrected;
A second correction unit that corrects and outputs the image data output by the first correction unit;
A projection unit that projects an image based on the image data output by the second correction unit;
An image generator for adjustment that generates image data for adjustment;
A correction control unit that causes the second correction unit to correct the adjustment image data and causes the projection unit to project the correction image data;
When the adjustment image data is not corrected by the first correction unit and is corrected by the second correction unit, an image projected by the projection unit is taken as a captured image captured by the imaging unit. A correction data generation unit that generates correction data used for correction by the second correction unit,
A projector comprising: An input unit for inputting image data;
A first correction unit that corrects image data input from the input unit and outputs corrected image data or image data that has not been corrected;
A second correction unit that corrects and outputs the image data output by the first correction unit;
A display unit comprising: a display unit configured to display an image based on image data output from the second correction unit on a display surface;
Generating image data for adjustment;
Correcting the generated image data for adjustment by the second correction unit;
Displaying an image based on the image data for adjustment corrected by the second correction unit on the display surface;
Based on the captured image of the image displayed on the display surface when the adjustment image data is not corrected by the first correction unit and is corrected by the second correction unit, 2 generating correction data used for correction by the correction unit;
A control method for a display device, comprising:

Images