JP2011010114A - Projection type video display device and projection lens unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type video display device and a projection lens unit in which a user interface corresponding to a video adjustment function specific for the projection lens unit can be provided.SOLUTION: A projection lens unit 3 is mounted to a device body removably. The projection lens unit includes: a projection lens system 30 for coupling projection light to a screen 100; a drive system (lens shift motor 32, zoom motor 34, focus motor 36) configured to adjust a projected video image by driving the projection lens system 30; and a storage section 40 for storing information on a video adjustment function specific for the drive system. In a state that the projection lens unit 3 is mounted to the device body, a video control circuit 70 communicates information on the video adjustment function specific for the drive system with the storage section 40 and performs the OSD display of the information on the video adjustment function specific for the drive system.

Description

  The present invention relates to a projection-type image display device and a projection lens unit, and more specifically to a projection lens unit that can be attached to and detached from the apparatus body and a projection-type image display device to which the projection lens unit is attached.

  2. Description of the Related Art In general, a projection-type image display device (hereinafter also referred to as a projector) is provided with a function for adjusting a projected image in order to project an image free from distortion and out-of-focus on a screen. . Such adjustment functions include a focus adjustment function that adjusts the focus distance according to the distance between the projector and the screen, a zoom function that adjusts the size of the image projected on the screen, and an optical axis that There is a lens shift function that projects an image to the center of the screen even when it does not pass through the center.

  As a configuration example of a projector having such a projection image adjustment function, the projector includes a light source unit, a liquid crystal panel that displays a projected image, a liquid crystal panel that projects a video on a screen, and a liquid crystal panel. A projection lens system for projecting light transmitted from the screen, a video input terminal for inputting a video signal from the outside, a video signal processing circuit for converting the input video signal into a video to be displayed on a liquid crystal panel, A video adjustment dial that is manually operated by the viewer, a video control circuit that controls each part so that the projection state of the video is adjusted according to an input from the video adjustment dial, and a projection lens according to control from the video control circuit A lens shift motor, a zoom motor, and a focus motor for driving predetermined portions of the system are provided.

  In the above configuration, the video control circuit includes, as parameters for representing the adjustment state of the projected video, a parameter representing the focus adjustment state, a parameter representing the zoom state, and a parameter representing the lens shift state. keeping. A video adjustment dial is provided for each adjustment parameter in the video control circuit. When the viewer rotates the video adjustment dial, the video control circuit increases or decreases the corresponding adjustment parameter according to the rotation direction and the rotation amount. Then, the projection lens system is adjusted by driving a motor corresponding to the updated adjustment parameter.

  The adjustment parameter is increased or decreased in accordance with the remote operation by the viewer using a remote controller (remote controller) in addition to the configuration in which the adjustment is performed according to the rotation state of the video adjustment dial manually operated by the viewer as described above. Configuration is adopted. In such a configuration, the adjustment parameter input to the projector from the remote controller is displayed on the screen (on-screen display) as a guide screen so as to be superimposed on another image. The viewer can adjust the projected image by increasing or decreasing the adjustment parameter while viewing the guide screen.

JP 2008-185712 A

  By the way, in some projectors, the projection lens unit is configured to be replaceable. In such a projector with a replaceable projection lens unit, the projection lens unit is mounted in a detachable state with respect to the apparatus main body.

  Such a projection lens unit is also called an option lens, and is composed of a projection lens system and an actuator for driving the projection lens system. Actuators include motor-driven actuators that perform lens shift adjustment, zoom adjustment, and focus adjustment by driving the lens shift motor, zoom motor, and focus motor as described above, and the outer periphery of the lens barrel that holds the projection lens system. There is a manual type that performs zoom adjustment and focus adjustment by manually operating an operation ring that is rotatably provided.

  Furthermore, there are various types of projection lens units such as a type without a zoom function and a fixed focus type. For this reason, the projector main body is generally configured such that these plural types of projection lens units can be exchanged.

  However, the projectors up to now are not configured to include means for the apparatus main body to detect that the projection lens unit has been replaced. Therefore, when it is replaced with a projection lens unit having a manual actuator, the adjustment parameters from the remote control are displayed on the screen, so that the adjustment of the projected image is actually performed. Since the actuator is not operating, there was a problem that the projected image could not be adjusted.

  Even if the replaced projection lens unit has an electric actuator, if it is not a genuine product, the correspondence between the preset adjustment parameters and the adjustment amount of the projection lens system will be lost. As a result, a desired image cannot be projected onto the screen.

  Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide a projection-type image display device and a projection lens capable of providing a user interface corresponding to an image adjustment function unique to the projection lens unit. Is to provide a unit.

  A projection-type image display device according to an aspect of the present invention includes a projection lens unit and a device main body to which the projection lens unit is attached in a detachable state. The projection lens unit includes a projection lens system for coupling projection light onto the projection surface, a drive system configured to adjust a projected image by driving a predetermined portion of the projection lens system, and a drive And a storage unit for storing information related to the video adjustment function unique to the system. The apparatus main body includes a communication unit that enables communication of information related to a video adjustment function specific to the drive system with the projection lens unit in a state where the projection lens unit is mounted on the apparatus main body, and an image specific to the drive system. Display means for displaying information on the adjustment function on the projection surface.

  Preferably, the apparatus main body further includes input operation means for receiving an operation for adjusting a projected image from the viewer. The display means displays on the projection surface a user interface for prompting input of an adjustment parameter corresponding to a video adjustment function unique to the drive system.

  Preferably, the storage unit is further configured to store information indicating that the projection lens unit is a genuine product. The display means displays information on whether or not the projection lens unit is a genuine product on the projection surface.

  A projection lens unit according to another aspect of the present invention is attached to the apparatus main body of the projection display apparatus in a detachable state. The projection lens unit includes a projection lens system for forming an image of the projection light on the projection surface, a drive system configured to adjust a projection image by driving a predetermined portion of the projection lens system, and a drive system. And a storage unit for storing information related to the video adjustment function unique to the camera. The storage unit is configured to be able to communicate information regarding a video adjustment function unique to the drive system with the apparatus main body in a state where the projection lens unit is mounted on the apparatus main body.

  The projection type video display apparatus according to another aspect of the present invention is configured such that the projection lens unit is detachable from the apparatus main body. The projection lens unit includes a projection lens system for forming an image of the projection light on the projection surface, a drive system configured to adjust a projection image by driving a predetermined portion of the projection lens system, and a drive system. And a storage unit for storing information related to the video adjustment function unique to the image. The projection-type image display device includes a communication unit that enables communication of information regarding a video adjustment function unique to the drive system with the projection lens unit in a state where the projection lens unit is mounted on the apparatus body, and a drive system. Display means for displaying information related to the unique video adjustment function on the projection surface.

  According to the present invention, the projection lens unit is provided with the storage unit for storing information relating to the video adjustment function provided therein, and the information is communicated between the storage unit and the apparatus main body. Thus, the image adjustment function can be identified on the apparatus main body side. As a result, it is possible to provide a user interface corresponding to a video adjustment function unique to the projection lens unit.

It is a schematic perspective view which shows the external appearance of the projection type video display apparatus by embodiment of this invention. It is a schematic perspective view which shows the external appearance of the projection lens unit by embodiment of this invention. 1 is an overall configuration diagram of a projector according to an embodiment of the present invention. It is a figure explaining the identification process of the video adjustment function by a video control circuit. It is a flowchart explaining the identification process of the image | video adjustment function intrinsic | native to a projection lens unit. It is a block diagram for demonstrating the display process by a video control circuit It is a figure explaining an example of the OSD display by the display process of the image | video adjustment function according to this Embodiment. It is a flowchart explaining the adjustment process of the projection image | video by an image | video control circuit. It is a flowchart explaining the control structure of the video control circuit according to this Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a schematic perspective view showing the external appearance of a projection display apparatus according to an embodiment of the present invention.

  Referring to FIG. 1, a projection-type image display device (hereinafter also referred to as “projector”) 1 includes a housing 2 and a projection lens unit 3 arranged so as to protrude from one surface of the housing 2. I have. The housing 2 has a mesh structure, and has an inlet (not shown) for taking cooling air into the housing and a mesh structure, and discharges cooling air from the housing to the outside. An exhaust port 5 is provided.

  The projection lens unit 3 is attached to the housing 2 in a detachable state. The projector 1 in the present embodiment is configured such that a plurality of projection lens units can be exchanged. For this reason, although not shown, the housing 2 is provided with a mounting recess for mounting the projection lens unit 3. When the projection lens unit 3 is loaded in this mounting recess, the claw provided on the inner periphery of the apparatus recess and the claw provided on the outer periphery of the lens barrel of the projection lens unit 3 are fitted. Thereby, the projection lens unit 3 is fixed to the housing 2.

  FIG. 2 is a schematic perspective view showing the appearance of the projection lens unit according to the embodiment of the present invention.

  Referring to FIG. 2, the projection lens unit 3 is configured to adjust a projection image by driving a projection lens system 30 for forming an image of projection light on a screen and a predetermined portion of the projection lens system 30. Drive system. Such adjustment functions include a focus function that adjusts the focus distance according to the distance between the projector and the screen, a zoom function that adjusts the size of the image projected on the screen, and the projector on the front of the screen. There is a lens shift function for projecting an image to the center of the screen even when it is not installed and the optical axis does not pass through the center of the screen.

  In the configuration example of FIG. 2, the drive system includes a lens shift motor 32, a zoom motor 34, and a focus motor 36, and electrically adjusts the projected image by driving these motors. Therefore, a voltage input terminal 39 for supplying a driving voltage to these motors is provided on the substrate 38 provided on the outer periphery of the lens barrel portion of the projection lens system 30. The voltage input terminal 39 is electrically connected to a voltage output terminal provided in the mounting recess when the projection lens unit 3 is mounted in the mounting recess of the housing 2. Thereby, the projection image can be adjusted in the projection lens system 30 while the projection lens unit 3 can be replaced.

  Furthermore, in projection lens unit 3 according to the present embodiment, substrate 38 is provided with a storage unit 40 for storing information relating to a video adjustment function unique to the drive system. The video adjustment function unique to the drive system is a projection video adjustment function provided in the drive system. In the configuration example of FIG. 2, an electric focus function, zoom function, and lens shift function correspond to this. The image adjustment function unique to this drive system differs depending on the type of the projection lens unit, and there are those having a manual focus function and a zoom function, and those having no zoom function.

  The storage unit 40 is configured by a non-volatile memory or hardware such as a flash memory or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 40 stores, for example, a unique identifier (ID) configured by a combination of numbers, symbols, and the like as information regarding the video adjustment function unique to the drive system. When the projection lens unit 3 is mounted in the mounting recess of the housing 2, the storage unit 40 is communicably connected to a video control circuit built in the apparatus main body. The image control circuit of the apparatus body reads out an ID stored in the storage unit 40 by a method described later in a state where the projection lens unit 3 is mounted, and is provided in the projection lens unit 3 based on the ID. Identify video adjustment functions.

  FIG. 3 is an overall configuration diagram of the projector according to the embodiment of the present invention. 3 shows only a video playback unit for projecting video on the screen 100, the projector 1 further includes an audio playback unit for playing back audio.

  Referring to FIG. 3, projector 1 includes a light source 10 that emits illumination light, a liquid crystal light valve 20 that displays an image to be projected, and a projection lens system 30 that projects light transmitted from liquid crystal light valve 20 onto screen 100. And a video input terminal 50 for inputting a video signal from the outside, and a video signal processing circuit 60 for converting the input video signal into a video to be displayed on the liquid crystal light valve 20.

  In addition, the projector 1 further includes a video adjustment dial 80 that is manually operated by the viewer, a video control circuit 70, and a lens shift that drives each predetermined portion of the projection lens system 30 in accordance with control from the video control circuit 70. A motor 32, a zoom motor 34, and a focus motor 36 are provided.

  The light source 10 includes, for example, an ultrahigh pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like. Light is emitted from the light source 10 as substantially parallel light.

  Although not shown, the liquid crystal light valve 20 includes an incident-side polarizing plate and a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates (a pixel electrode and an alignment film are formed). The output side polarizing plate.

  The projection lens system 30 is composed of a plurality of lenses arranged so that their optical axes coincide with each other. The lens shift motor 32 is provided to translate the entire projection lens system 30 in a direction perpendicular to the optical axis. The zoom motor 34 and the focus motor 36 are provided so as to move a predetermined part of each of the lenses constituting the projection lens system 30 along the optical axis.

  The video control circuit 70 is a control device for controlling each unit so that the projection state of the video is adjusted according to the input from the video adjustment dial 80. As an example, the video control circuit 70 is a CPU (Central Processing Unit) and a ROM (Read Only). A microcomputer including a storage unit such as a memory (RAM) and a random access memory (RAM) is mainly configured. The video control circuit 70 internally retains a parameter representing the focus adjustment state, a parameter representing the zoom state, and a parameter representing the lens shift state as parameters for representing the adjustment state of the projected video.

  A video adjustment dial 80 is provided for each adjustment parameter in the video control circuit 70. That is, a dial for adjusting a parameter for focus adjustment, a dial for adjusting a parameter for zooming, and a dial for adjusting a parameter for lens shift are provided.

  An operation of projecting an image on the screen 100 in the projector 1 configured as described above will be described. The video signal is input from the video input terminal 50. The video signal processing circuit 60 generates a video to be displayed on the liquid crystal light valve 20 from the input video signal and displays the video on the liquid crystal light valve 20. The liquid crystal light valve 20 receives illumination light emitted from the light source 10 and transmits light corresponding to the displayed image. The transmitted light is enlarged and projected onto the screen 100 by the projection lens system 30.

  In the operation of projecting the image, the projection lens system 30 and each of the lenses constituting the projection lens system 30 are arranged in a predetermined arrangement by the lens shift motor 32, the zoom motor 34, and the focus motor 36 according to control from the image control circuit 70. It has been adjusted to be. The image projection state (focusing, zooming, image projection position) is determined according to these arrangements.

  As an example of the operation for adjusting the projected image, focus adjustment is performed as follows. When the distance between the projector 1 and the screen 100 is different from the adjustment parameter, a blurred image is projected on the screen 100. In such a case, the viewer performs focus adjustment by rotating the adjustment dial. When the adjustment dial is rotated at this time, the video control circuit 70 increases or decreases the adjustment parameter according to the rotation amount and the rotation direction. Furthermore, when the adjustment parameter is updated, the video control circuit 70 drives the focus motor 36 so that the distance from the projection lens system 30 until the projected video is in focus matches the updated adjustment parameter. Adjustment of the lens system 30 is performed. When the above operation is repeated and the adjustment parameter matches the distance between the projector 1 and the screen 100, the image projected on the screen 100 is in focus.

  The zoom adjustment and the lens shift adjustment are also performed by driving the zoom motor 34 and the lens shift motor 32 according to the updated adjustment parameters by the video control circuit 70, respectively.

(Configuration of video control circuit 70)
Here, the projection lens system 30 and the drive system for driving the projection lens system 30 constitute an integral projection lens unit 3, which is detachably attached to the main body of the projector 1. That is, the projector 1 is configured such that a plurality of projection lens units can be exchanged.

  In the present embodiment, the projection lens unit 3 includes a storage unit 40 for storing information related to a video adjustment function unique to the drive system, as described with reference to FIG. In a state where the projection lens unit 3 is mounted on the apparatus main body, the video control circuit 70 identifies a video adjustment function unique to the projection lens unit 3 by communicating with the storage unit 40. Then, the video control circuit 70 controls each unit so that the adjustment operation of the projected video is performed by appropriately using the identified video adjustment function.

  Hereinafter, a control structure of video control circuit 70 according to the present embodiment will be described. First, the identification processing of the video adjustment function unique to the projection lens unit 3 will be described with reference to FIGS. 4 and 5.

(Identification processing of image adjustment function unique to projection lens unit)
FIG. 4 is a diagram for explaining the video adjustment function identification processing by the video control circuit 70.

  Referring to FIG. 4, in a state where projection lens unit 3 is mounted on the apparatus main body, video control circuit 70 and storage unit 40 of projection lens unit 3 have three communication lines 72, 74, 76, 1 It is connected by a power line (not shown) of books.

  Specifically, the communication line 72 constitutes a clock line for communicating a clock signal for synchronizing the CPU of the video control circuit 70 and the storage unit 40 of the projection lens unit 3.

  The communication line 74 constitutes a data line for communicating a data signal used for identification processing of the video adjustment function between the video control circuit 70 and the storage unit 40. This data signal also includes an ACK (Acknowledge) signal that is a signal for confirming the quality of the communication environment. The video control circuit 70 transmits an ACK signal to the storage unit 40 at the beginning of the identification process, and confirms the quality of the communication environment based on the presence / absence of a response signal to the ACK signal from the storage unit 40.

  The communication line 76 constitutes a busy signal line for transmitting a busy signal emitted from the storage unit 40 to the video control circuit 70. The busy signal is a signal that is generated when the storage unit 40 cannot respond to the transmission signal from the video control circuit 70. For example, when the storage unit 40 is executing the previous identification process, a busy signal is output to the video control circuit 70 via the communication line 76.

  FIG. 5 is a flowchart for explaining the identification processing of the video adjustment function unique to the projection lens unit. This flowchart is called from the main routine and executed every time a predetermined condition such as when the power of the projector 1 is turned on or when the projection lens unit is attached is established.

  Referring to FIG. 5, first, on the video control circuit 70 side, random numbers are generated together with the ACK signal, and these signals are transmitted to the storage unit 40 of the projection lens unit 3 (step S11). Then, the video control circuit 70 enters a reception standby state for a response to the transmission signal.

  On the other hand, on the projection lens unit 3 side, first, the transmission signal from the video control circuit 70 is in a reception standby state. At this time, the storage unit 40 measures the waiting time by the timer means, and when the measured value exceeds a preset waiting time (NO in step S21), the storage unit 40 ends the identification process. .

  When the transmission signal from video control circuit 70 is received within the set time in step S21 (YES in step S21), storage unit 40 determines that the communication environment is normal. Then, the storage unit 40 encrypts the received random number using the ID of the projection lens unit 3 stored in advance (hereinafter also referred to as a lens ID) as a key (step S22). The random number encrypted using the lens ID as a key is transmitted to the video control circuit 70 (step S23).

  Here, the ID (lens ID) of the projection lens unit 3 is constituted by a character string composed of a combination of numbers, symbols, and the like, for example, [LS0001]. This character string can include information related to a video adjustment function unique to the drive system of the projection lens unit 3 and information indicating that the projection lens unit 3 is a genuine product.

  Specifically, in the present embodiment, a specific symbol (for example, [LS]) indicating that it is a genuine product is specified in the first half of the character string, and in the second half of the character string, A specific number (for example, [0001]) indicating the video adjustment function is designated. As an example, [0001] corresponds to a projection lens unit having an electric zoom function, an electric focus function, and a lens shift function. Further, in the form of [0002] in the case of a projection lens that does not have an electric zoom function, [0003] in the case of a lens that has a manual zoom function and a manual focus function, a number is assigned for each image adjustment function. Is specified. Note that these pieces of information are not limited to the character string described above, and may be designated by a serial number or the like.

  In the video control circuit 70, in the reception standby state, the standby time is measured by the timer means as in the storage unit 40. When the measured time exceeds the set time (NO in step S12), video control circuit 70 ends the identification process.

  On the other hand, when a response from the storage unit 40 is received within the set time (YES in step S12), the video control circuit 70 reads out a plurality of types of lens IDs stored in advance in the storage unit inside the microcomputer, and One of these lens IDs is selected as a key in order and the random number is decrypted (step S13). For example, five types of lens IDs [LS0001] to [LS0005] are prepared corresponding to the types of video adjustment functions.

  At this time, if the decryption is successful with a certain lens ID as a key, that is, if the decrypted random number matches the initial random number transmitted to the storage unit 40, the video control circuit 70 By referring to a lens ID (for example, [LS0001]) used as a key for decoding, an image adjustment function unique to the projection lens unit 3 is identified. On the other hand, if any lens ID cannot be used as a key, that is, if the combined random number and the initial random number do not match, the video control circuit 70 uses a non-genuine projection lens unit. It is identified (step S14).

(Image adjustment function display processing)
Next, when a video adjustment function unique to the projection lens unit is identified by the identification process shown in FIG. 5, the video control circuit 70 executes a display process for notifying the viewer of the identified video adjustment function. To do. Specifically, the video control circuit 70 displays (ON) a graphical user interface (GUI) on the screen for executing a projection video adjustment process in response to a projection video adjustment request from the viewer. A process for reflecting the identified video adjustment function on the GUI image in the scene when the screen is displayed.

FIG. 6 is a block diagram for explaining display processing by the video control circuit 70.
With reference to FIG. 6, the video control circuit 70 transmits the video adjustment function unique to the projection lens unit acquired by communication with the storage unit 40 to the video signal processing circuit 60. Specifically, when the viewer inputs the video adjustment dial 80 (FIG. 3) or the video adjustment key of the remote controller, an adjustment parameter corresponding to the input content, that is, a video adjustment request is input to the video control circuit 70. The Upon receiving this video adjustment request, the video control circuit 70 outputs a video adjustment function unique to the projection lens unit to the video signal processing circuit 60.

  The video signal processing circuit 60 includes a video processing unit 62, an OSD generation unit 64, and a synthesis unit 66. The video adjustment function transmitted from the video control circuit 70 is input to the OSD generation unit 64.

  The video processing unit 62 performs various conversions such as resolution conversion for adjusting the resolution to the number of pixels of the liquid crystal light valve 20 for the video signal input from the video input terminal 50 (FIG. 3), brightness adjustment, contrast adjustment, sharpness adjustment, and the like. The image quality is adjusted and output to the combining unit 66.

  The OSD generation unit 64 generates a GUI image for OSD display of the video adjustment function transmitted from the video control circuit 70, and outputs the generated GUI image to the synthesis unit 66. Specifically, the OSD generation unit 64 includes GUI image data indicating graphics, fonts, and the like for forming a GUI image in a storage unit (not shown). When the video control circuit 70 outputs the video adjustment function to the OSD generation unit 64, the OSD generation unit 64 reads out necessary GUI image data from the storage unit and outputs it to the synthesis unit 66.

  The composition unit 66 performs processing for superimposing the GUI image on the projected video. Specifically, the synthesizing unit 66 synthesizes the GUI image with the video data input from the video processing unit 62 so that the GUI image is superimposed on a predetermined position of the projected video. The synthesized video data is input to the liquid crystal light valve 20.

  In the liquid crystal light valve 20, a light valve drive unit (not shown) generates a drive signal for driving the liquid crystal light valve in accordance with the input video data. The liquid crystal light valve 20 modulates the light source light in accordance with the drive signal, whereby image light corresponding to the image data is formed and projected from the projection lens system 30 onto the screen.

  When the viewer increases or decreases the adjustment parameter by operating the video adjustment dial 80 (FIG. 3) or the remote controller while viewing the GUI image projected on the screen, the video control circuit 70 matches the updated adjustment parameter. Further, the projection lens system 30 is adjusted by driving the drive system 35 (including the lens shift motor 32, the zoom motor 34, and the focus motor 36).

  FIG. 7 is a diagram illustrating an example of OSD display by display processing of the video adjustment function according to the present embodiment.

  FIG. 7A shows a GUI image 110 projected on the screen 100 when the projection lens unit 3 has an electric zoom function and an electric focus function. In the case of the same figure, the icon for selecting the electric zoom function and the icon for selecting the electric focus function are displayed with the same luminance. Therefore, since the viewer can determine that both of the video adjustment functions are valid, zoom adjustment and focus adjustment can be performed by performing an input operation on the video adjustment dial 80 (FIG. 3) or the remote control.

  On the other hand, FIG. 7B shows a GUI image 110 projected on the screen 100 when the projection lens unit 3 does not have the electric zoom function but has only the electric focus function. In the case of the same figure, an icon for selecting an electric zoom function that is an invalid function is displayed with a relatively low luminance compared to an icon for selecting an electric focus function that is an effective function. Accordingly, since the viewer can determine that only the electric focus function is effective, focus adjustment can be performed by performing an input operation on the video adjustment dial 80 (FIG. 3) or the remote control.

  As described above, the GUI is generated so that the validity / invalidity of the video adjustment function becomes clear in accordance with the video adjustment function unique to the projection lens unit, so that the viewer is unique to the projection lens unit. It is possible to adjust the projected image by properly using a proper image adjustment function.

  In the OSD display example of FIG. 7, the configuration has been described in which the invalid video adjustment function is displayed with relatively low luminance. However, the display processing of the video adjustment function according to the present embodiment is limited to this configuration. For example, a configuration in which processing such as relative reduction in contrast, blurring, and achromatic color is performed on an invalid video adjustment function is also possible.

  Although illustration is omitted, if the projection lens unit is identified as a non-genuine product in the above-described video adjustment function identification process, a message image for informing the viewer of that fact is displayed on the screen 100. Projected. In this case, the video control circuit 70 transmits information that the projection lens unit is a non-genuine product to the OSD generation unit 64 (FIG. 6). The OSD generation unit 64 generates a message image that the projection lens unit is a non-genuine product, and outputs the message image to the synthesis unit 66 (FIG. 6). As a result, the message image is OSD-displayed.

(Projection image adjustment processing)
Finally, projection image adjustment processing by the image control circuit 70 according to the present embodiment will be described with reference to FIG.

  FIG. 8 is a flowchart for explaining the adjustment processing of the projected video by the video control circuit 70. The processing of this flowchart is called from the main routine and executed at regular time intervals or whenever a predetermined condition is satisfied. In FIG. 8, a processing flow for performing zoom adjustment is described as a representative example, but similar processing is performed for focus adjustment and lens shift adjustment.

  Referring to FIG. 8, when a series of processing is started, video control circuit 70 first performs a process specific to the projection lens unit obtained by the identification processing shown in FIG. 5 in order to perform zoom adjustment of the projected video. Based on the video adjustment function, it is determined whether or not the electric zoom function of the projection lens unit is effective (step S31). If the electric zoom function is not effective (NO in step S31), the zoom adjustment process ends.

  On the other hand, when the electric zoom function is valid (YES in step S31), it is determined whether or not there is a zoom adjustment request (video adjustment dial 80 (FIG. 3) or remote controller input operation) from the viewer. Determination is made (step S32). If there is no request for zoom adjustment (NO in step S32), the process ends.

  On the other hand, when there is a request for zoom adjustment (YES in step S32), the video control circuit 70 causes the rate at which the video is enlarged by the projection to match the adjustment parameter updated by the input operation of the viewer. Then, the zoom motor 34 (FIG. 3) is driven (step S33), and the projection lens system 30 is adjusted (step S34). As described above, the projector 1 performs zoom adjustment.

(Control flow)
The control structure for adjusting the projected video by the video control circuit 70 described above can be summarized in the processing flow of FIG.

  FIG. 9 is a flowchart illustrating a control structure of video control circuit 70 according to the present embodiment. The flowchart shown in FIG. 9 can be realized by executing a program stored in advance in the video control circuit 70.

  Referring to FIG. 9, it is first determined whether or not the projection lens unit is attached (step S01). The determination in step S01 is performed, for example, by detecting an electrical connection between the voltage input terminal 39 (FIG. 2) of the projection lens unit and the voltage output terminal of the apparatus main body.

  If it is determined that the projection lens unit 3 is attached (YES in step S01), the video control circuit 70 communicates with the storage unit 40 inside the projection lens unit 3 (see FIG. 5) to perform projection. The ID of the lens unit 3 is detected. As described above, this ID is an identifier that specifies information related to a video adjustment function unique to the drive system of the projection lens unit 3 by a number, a symbol, or the like. The video control circuit 70 identifies the video adjustment function provided in the projection lens unit 3 based on the detected ID (step S02).

  Next, in order to execute the adjustment processing of the projected video, the video control circuit 70 determines whether or not there is a video adjustment request from the viewer (step S03). The determination in step S03 is made based on whether or not an adjustment parameter is input according to the input content to the video adjustment dial 80 (FIG. 3) or the remote controller.

  If it is determined that there is a video adjustment request (YES in step S03), video control circuit 70 performs OSD display of the video adjustment function unique to the projection lens unit identified in step S02 (step S04). In this OSD display, as described with reference to FIGS. 6 and 7, the video control circuit 70 performs a process for reflecting the identified video adjustment function on the GUI image for executing the adjustment process of the projected video. .

  Then, the video control circuit 70 adjusts the projection lens system 30 by driving the lens shift motor 32, the zoom motor 34, and the focus motor 36 in accordance with the updated adjustment parameters (step S05). Specifically, the video control circuit 70 adjusts the projected video by using the video adjustment function unique to the projection lens unit 3 by performing the processing of FIG.

  As described above, in the projector according to the present embodiment, the projection lens unit is given an ID for identifying information related to the video adjustment function included in the projection lens unit, so that the viewer can exchange the information. A user interface corresponding to a video adjustment function unique to the projection lens unit can be provided. As a result, the viewer can adjust the projection video by properly using the video adjustment function unique to the projection lens unit.

  In this embodiment, a liquid crystal projector is used as the projector, but the present invention is not limited to this. For example, the technology of the present invention may be applied to other projectors such as a DLP (Digital Light Processing) (registered trademark) projector.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  1 projector, 2 housing, 3 projection lens unit, 5 exhaust port, 10 light source, 20 liquid crystal light valve, 30 projection lens system, 32 lens shift motor, 34 zoom motor, 35 drive system, 36 focus motor, 38 substrate, 39 Voltage input terminal, 40 storage unit, 50 video input terminal, 60 video signal processing circuit, 62 video processing unit, 64 OSD generation unit, 66 synthesis unit, 70 video control circuit, 72, 74, 76 communication line, 80 video adjustment dial , 100 screens, 110 GUI images.

Claims (5)

A projection lens unit;
An apparatus main body mounted with the projection lens unit being detachable,
The projection lens unit is
A projection lens system for coupling the projection light onto the projection surface;
A drive system configured to adjust a projected image by driving a predetermined portion of the projection lens system; and
A storage unit for storing information relating to a video adjustment function unique to the drive system,
The apparatus main body is
Communication means that enables communication of information relating to a video adjustment function unique to the drive system with the projection lens unit in a state where the projection lens unit is mounted on the apparatus main body,
And a display means for displaying information relating to a video adjustment function specific to the drive system on the projection surface. The apparatus main body further includes an input operation means for receiving an operation for adjusting a projected image from a viewer,
The projection display apparatus according to claim 1, wherein the display unit displays a user interface for prompting input of an adjustment parameter corresponding to an image adjustment function unique to the drive system on the projection surface. The storage unit is further configured to store information indicating that the projection lens unit is a genuine product,
The projection display apparatus according to claim 1, wherein the display unit displays information on whether or not the projection lens unit is a genuine product on the projection surface. A projection lens unit that is attached to the main body of the projection display device in a detachable state,
A projection lens system for forming an image of the projection light on the projection surface;
A drive system configured to adjust a projected image by driving a predetermined portion of the projection lens system; and
A storage unit for storing information relating to a video adjustment function unique to the drive system,
The storage unit is configured to enable communication of information regarding a video adjustment function unique to the drive system with the apparatus main body in a state where the projection lens unit is mounted on the apparatus main body. . A projection-type image display device in which a projection lens unit is configured to be detachable from the apparatus body,
The projection lens unit is
A projection lens system for forming an image of the projection light on the projection surface;
A drive system configured to adjust a projected image by driving a predetermined portion of the projection lens system; and
A storage unit for storing information relating to a video adjustment function unique to the drive system,
Communication means that enables communication of information relating to a video adjustment function unique to the drive system with the projection lens unit in a state where the projection lens unit is mounted on the apparatus main body,
A projection-type image display device comprising: display means for displaying information relating to an image adjustment function unique to the drive system on the projection surface.

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