JP4984968B2 - Projection apparatus, abnormality control method and program - Google Patents

Description

  The present invention relates to a projection apparatus, an abnormality method, and a program suitable for a projector having an automatic focusing function for projecting an optical image corresponding to an input image signal by focusing on a projection target surface.

Conventionally, in a projector having a self-diagnosis function, an apparatus having the following technology has been considered so that the user can more easily grasp the details of the error content found by the self-diagnosis function. That is, in the device, based on the error information detected by the self-diagnosis function, the audio information including the error number corresponding to the error content and the image information including the error number are selected from the audio memory and the image memory. The audio information is read out and output from the speaker as audio, and the image information is output as an error display image in the projected video. (Patent Document 1)
JP 2006-011156 A

  The technique described in Patent Document 1 is based on the assumption that an abnormality of a lamp that is a light source is basically diagnosed as an error and a warning is displayed as necessary. Therefore, if the projection system fails, for example, if the AF (automatic focusing) function of the projection lens module stops working and the projected image cannot be correctly formed on the projection target screen, the error content is displayed. The image information to be displayed cannot be projected in a state that can be recognized by the user, and only the audio information indicating the error content must be relied upon.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a projection apparatus that realizes a projectable state as much as possible even when a malfunction occurs in a projection system member, etc. It is to provide a control method and a program.

According to the first aspect of the present invention, an optical image corresponding to an input image signal is formed, and the formed optical image is focused on a projection target surface by an automatic focusing function for moving a focus lens position by driving a motor. Projection means for projecting, focus position storage means for storing a history of the focus position by the automatic focus function, and determination for determining an abnormality of the device that occurs before completion of movement of the focus lens position by the automatic focus function Means, a message storage means for storing a plurality of error message images corresponding to the abnormality of the apparatus determined by the determination means, and the focus lens position of the projection means according to the determination result by the determination means. is moved in accordance with the history of the in-focus position stored in the storage means, corresponding to what has been determined that there is abnormality in the apparatus by the determination means error The over-di image, characterized by comprising a projection control means for projecting reads from the message memory means.

  According to a second aspect of the present invention, in the first aspect of the invention, the projection control unit is configured so that the focus lens position of the projection unit is the latest in the focus position history stored in the focus position storage unit. It is characterized by being moved according to the in-focus position.

  According to a third aspect of the present invention, in the first aspect of the invention, the projection control unit is configured so that the focus lens position of the projection unit is the latest in the focus position history stored in the focus position storage unit. The movement is performed according to an average of a predetermined number of in-focus positions.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the projection control unit is configured so that the focus lens position of the projection unit is the latest in the focus position history stored in the focus position storage unit. Of the predetermined number of in-focus positions, the movement is performed according to the most frequently used one.

According to a fifth aspect of the present invention, an optical image corresponding to an input image signal is formed, and the formed optical image is focused on a projection target surface by an automatic focusing function for moving a focus lens position by driving a motor. Projection means for projecting, an aperture stop mechanism that is detachably disposed in the projection optical axis of the projection means, and a judgment for judging an abnormality of the device that occurs before completion of the movement of the focus lens position by the automatic focusing function Means, a message storage means for storing a plurality of error message images corresponding to the abnormality of the apparatus determined by the determination means, and the aperture stop mechanism in the projection optical axis of the projection means according to the determination result by the determination means. is inserted into, to project the error message image corresponding to the content it is determined that there is an abnormality of the apparatus by the determination means reads from the message memory means Characterized by comprising a projection control means.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the plurality of error message images corresponding to the abnormality of the reading and projecting device stored in the message storage means are the focus lens positions. An error message image corresponding to the inability to store in the in-focus position storage means is included.
According to a seventh aspect of the present invention, in the invention according to any one of the first to fifth aspects, a plurality of error message images corresponding to an abnormality of the reading and projecting device stored in the message storage means are the optical images. An error message image corresponding to the fact that the temperature in the vicinity of the light source lamp for projection cannot be detected or the temperature is an abnormal value is included.
According to an eighth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a plurality of error message images corresponding to an abnormality in the apparatus for reading and projecting stored in the message storage means are the projection control means. An error message image corresponding to the fact that the stored data is corrupted is included.
According to a ninth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a plurality of error message images corresponding to an abnormality of the reading and projecting device stored in the message storage means are moved by the motor. An error message image corresponding to an error in the lens module to be processed is included.

According to the tenth aspect of the present invention, an optical image corresponding to the input image signal is formed, and the formed optical image is focused on the projection target surface by an automatic focusing function for moving the focus lens position by driving the motor. An abnormality control method in a projection apparatus including a projection unit to project and a message storage unit that stores a plurality of error message images corresponding to the abnormality of the apparatus, and stores a history of in-focus positions by the automatic focusing function A focus position storing step, a determination step for determining an abnormality of the device that occurs before the movement of the focus lens position by the automatic focus function is completed, and a focus lens of the projection unit according to a determination result in the determination step position is moved in accordance with the history of the focus position stored in the focal position storage step, and corresponds to what has been determined that there is abnormality in the apparatus by the determination means error The message image is characterized by having a projection control step of projecting reads from the message memory.

According to the eleventh aspect of the present invention, an optical image corresponding to the input image signal is formed, and the formed optical image is focused on the projection target surface by an automatic focusing function for moving the focus lens position by driving the motor. A program executed by a computer incorporated in a projection apparatus that includes a projection unit to project and a message storage unit that stores a plurality of error message images corresponding to the abnormality of the apparatus, the in-focus position by the automatic focusing function A focus position storing step for storing the history of the image, a determination step for determining an abnormality of the device that occurs before the movement of the focus lens position by the automatic focusing function is completed, and the projection according to the determination result in this determination step. the focus lens position of the parts is moved in accordance with the history of the focus position stored in the focal position storage step, the above determination step The error message image corresponding to the content it is determined that there is an abnormality in the location, characterized in that to execute a projection control step of projecting reads from the message memory in the computer.
The invention according to claim 12 forms an optical image corresponding to the input image signal, and focuses the formed optical image on the projection target surface by an automatic focusing function that moves the focus lens position by driving the motor. A projection apparatus comprising: a projection unit that projects; an aperture stop mechanism that is removably disposed in a projection optical axis of the projection unit; and a message storage unit that stores a plurality of error message images corresponding to an abnormality of the apparatus. A determination step of determining an abnormality of the device that occurs before the movement of the focus lens position by the automatic focusing function is completed, and the aperture stop mechanism is projected according to a determination result by the determination unit The error message image corresponding to the content determined to be abnormal by the determination means is read from the message storage means and projected. Characterized in that and a projection control step of.
According to the thirteenth aspect of the present invention, an optical image corresponding to an input image signal is formed, and the formed optical image is focused on the projection target surface by an automatic focusing function for moving the focus lens position by driving a motor. A projection apparatus comprising: a projection unit that projects; an aperture stop mechanism that is removably disposed in a projection optical axis of the projection unit; and a message storage unit that stores a plurality of error message images corresponding to an abnormality of the apparatus. A program executed by a built-in computer, wherein a determination step of determining an abnormality of the device that occurs before completion of movement of the focus lens position by the automatic focusing function , and the aperture stop according to a determination result of the determination step An error message image corresponding to the content of the mechanism inserted into the projection optical axis of the projection unit and determined to be abnormal in the apparatus in the determination step Characterized in that to execute a projection control step of projecting reads from the message memory in the computer.

  According to the present invention, it is possible to realize a state where projection is possible as much as possible even when a problem occurs in a member of the projection system.

(First embodiment)
A first embodiment when the present invention is applied to a projector apparatus will be described below with reference to the drawings.

  FIG. 1 shows a functional configuration of an electronic circuit of the projector device 10 according to the embodiment. In the figure, image signals of various standards input from the input / output connector unit 11 are unified into image signals of a predetermined format by the image conversion unit 13 via the input / output interface (I / F) 12 and the system bus SB. Is sent to the projection encoder 14.

  The projection encoder 14 develops and stores the transmitted image signal in the video RAM 15, generates a video signal from the stored contents of the video RAM 15, and outputs the video signal to the projection drive unit 16.

  This projection drive unit 16 is a faster time-division drive that appropriately multiplies the frame rate, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations corresponding to the transmitted image signal. For example, the micromirror element 17 which is a spatial light modulation element (SOM) is driven to display.

  On the other hand, the light source lamp 19 using, for example, an ultra-high pressure mercury lamp disposed in the reflector 18 emits white light with high luminance. The white light emitted from the light source lamp 19 is colored in primary colors in a time-division manner through the color wheel 20, and is converted into a luminous flux having a uniform luminance distribution by the integrator 21, and then totally reflected by the mirror 22 to the micromirror element 17. Irradiated. Thus, an optical image is formed by the reflected light from the micromirror element 17, and the formed optical image is projected and displayed via a projection lens 23 on a screen (not shown) to be projected.

  The projection lens 23 enlarges and projects the optical image formed by the micromirror element 17 onto a target such as a screen, and the focus position and the zoom position (projection angle of view) can be arbitrarily changed.

  Here, for the sake of simplification, it is shown between the upstream side of the projection lens 23 and the micromirror element 17, but actually, it is along the projection optical axis inside the projection lens 23 constituted by a plurality of optical lenses. An aperture stop 24 that can be inserted and removed is disposed on a part.

  The aperture stop 24 is inserted into the projection optical axis between a plurality of optical lenses constituting the projection lens 23 by, for example, manual operation or driving of an actuator (not shown). Although not limited, the aperture diameter is appropriately selected when necessary to limit the amount of projected light.

  However, the light source lamp 19 is turned on, the motor (M) 25 that rotates the color wheel 20 is rotated, and the focus motor and zoom lens in the projection lens 23 are moved along the projection optical axis. M) The projection light processing unit 27 performs all the rotational driving of 26.

  The control unit 28 controls all the operations of the above circuits. The control unit 28 includes a CPU, a work memory, and the like, and executes a control operation using an operation program, various fixed data, and the like that are fixedly stored in a program memory 29 that is a nonvolatile memory.

  Further, a focusing position storage unit 30, a distance measurement processing unit 31, and an audio processing unit 32 are connected to the control unit 28 via the system bus SB.

  The in-focus position storage unit 30 is configured by a non-volatile memory such as a flash memory, for example, and when the control unit 28 ends the projection operation associated with the user's power-off operation, the in-focus position of the focus lens in the projection lens 23 at that time Is converted into data and stored in a predetermined number, for example, a maximum of ten.

  In a state where ten pieces of focus position data have already been stored in the focus position storage unit 30, and when the control unit 28 causes the focus position storage unit 30 to store focus data with a new power-off operation, The control unit 28 deletes the oldest in-focus position data already stored, and instead stores the latest in-focus position data in the in-focus position storage unit 30 so that the latest 10 in-focus position data are always stored. The in-focus position data is updated and stored.

  The distance measurement processing unit 31 controls and drives a distance measurement sensor 33 composed of two pairs of phase difference sensors arranged in proximity to the projection lens 23 on the front surface of the projector device 10, from their detection outputs to arbitrary point positions. The calculated distance value data is sent to the control unit 28.

  The sound processing unit 32 includes a sound source circuit such as a PCM sound source, converts the sound data given at the time of the projection operation into analog, and drives a speaker 34 provided on, for example, the upper surface of the projector device 10 to emit sound, or is necessary. Generates a beep sound and the like.

An operation signal corresponding to a user's key operation is directly input to the control unit 28 from the key switch unit 35 and the Ir light receiving unit 36.
The key switch unit 35 is provided, for example, on the upper surface of the casing of the projector device 10, and includes a power key, an AFK (Automatic Focus / Automatic Key-stone correction) key, a zoom key, an input selection key, and a cursor ( The “↑”, “↓”, “←”, “→”) key, “Enter” key, and the like, and similar keys are also arranged on a remote controller (not shown) of the projector apparatus 10.

  The Ir light receiving unit 36 includes, for example, Ir (infrared) light receiving units formed on the front surface and the back surface of the housing of the projector device 10, respectively, and demodulates an infrared light modulation signal from a remote controller (not shown) into a code signal. The data is sent to the control unit 28.

Next, the operation of the above embodiment will be described.
FIG. 2 shows the processing contents executed by the control unit 28 based on the operation program read from the program memory 29 immediately after the power is turned on. Initially, initial setting of the entire apparatus 10 including initial driving of the lens module of the projection lens 23 is first performed to check whether normal projection operation can be performed (step A01).

  Here, the initial driving of the lens module of the projection lens 23 means that, for example, the zoom lens and the focus lens are independently operated in a predetermined direction over the entire stroke within the movable range, and correct feedback is obtained from the lens motor 26. The control unit 28 determines whether or not, for example, through the projection light processing unit 27.

  The initial setting of the projector apparatus 10 as a whole is, for example, storing the focus lens position (focus position) in the focus position storage unit 30 based on the driving of the lens motor 26, driving the light source lamp 19 to turn on the vicinity of the lamp. The presence / absence of a detected temperature from a temperature sensor (not shown) provided in the case, and the value when the detected temperature exists, the stored data of the control board on which the CPU in the control unit 28 is mounted are checked, and the result is obtained. Judgment.

  Accordingly, it is determined whether or not the initial setting of the entire apparatus 10 including the initial driving of the lens module of the projection lens 23 in Step A01 has been completed normally (Step A02).

  Here, if it is determined that the initial setting has been completed normally, there is no abnormality, so that an image signal is input from the input / output connector unit 11 and a corresponding optical image is formed and displayed by the micromirror element 17. Then, the projection operation of projecting from the projection lens 23 is started (step A03), and the processing of FIG. 2 is completed as described above, and the normal projection operation is shifted as it is.

If it is determined in step A02 that the initial setting of the entire apparatus 10 has not been completed normally, specifically,
The focus lens position (focus position) in the projection lens 23 cannot be stored in the focus position storage unit 30;
・ The temperature cannot be detected from the temperature sensor near the light source lamp 19.
The temperature detected by the temperature sensor near the light source lamp 19 is an abnormal value.
-The stored data of the control board on which the CPU in the control unit 28 is mounted is broken,
The correct feedback cannot be obtained from the lens motor 26 that drives the projection lens 23, and the lens module of the projection lens 23 is in error.
In such a case, it is assumed that there is no room for performing the focusing operation so as to obtain an accurate in-focus position of the projection image, and the latest in-focus position data is read from the in-focus position storage unit 30, and the read data By moving the focus lens position in the projection lens 23 based on the above, a projection state with a higher probability of focusing is realized (step A04).

  After that, the image signal of the error message fixedly stored in the program memory 29 is read out, a corresponding optical image is formed by the micromirror element 17 and projected from the projection lens 23 toward the screen to be projected. 2 (step A05), the processing in FIG. 2 is temporarily ended as described above, and the subsequent response is left to the user of the projector device 10.

  As described above, even when a problem occurs in a projection system member or the like, it is possible to quickly realize a state in which focusing is easier using the past history of in-focus positions.

  In the embodiment described above, the latest focus data stored in the focus position storage unit 30 is read out and the focus lens position of the projection lens 23 is moved.

  As a result, using the most recent in-focus position history, the probability that the projected image will be in focus on the projection target screen is likely to be higher for the current projection operation. Can be realized quickly.

  In addition, instead of using the most recent in-focus position history in the above embodiment, the in-focus position storage unit 30 stores a predetermined number, for example, ten in-focus data. After obtaining the average value, the focus lens position of the projection lens 23 may be moved based on the result.

  By using the average value of the in-focus position in this way, it is unlikely that the projected image will be greatly deviated from the in-focus position on the screen to be projected in the current projection operation. As long as the error message is projected, a sufficiently useful state can be quickly realized.

  Further, instead of using the average value of the plurality of in-focus position histories, a predetermined number, for example, ten pieces of in-focus data stored in the in-focus position storage unit 30, is most frequently used. It is also possible to select an object by majority logic and move the focus lens position of the projection lens 23 according to the selection contents.

  By using the most frequently used focus position value as it is, the probability that the projected image will be focused on the projection target screen is likely to be much higher for the current projection operation. It is possible to quickly realize a state considered to be easy.

  In any case, in order to promptly realize a projection state that seems to have a high probability of being focused as described above, and to display an error message indicating that something is wrong with the device, the user can Appropriate measures can be taken immediately.

(Second Embodiment)
A second embodiment in which the present invention is applied to a projector apparatus will be described below with reference to the drawings.

  Note that the functional configuration of the electronic circuit of the projector device 10 'according to the embodiment is basically the same as that shown in FIG. 1, and therefore, the same parts are denoted by the same reference numerals. The description will be omitted.

Next, the operation of the above embodiment will be described.
FIG. 3 shows the processing contents executed by the control unit 28 based on the operation program read from the program memory 29 immediately after the power is turned on. Initially, initial setting of the entire apparatus 10 including initial driving of the lens module of the projection lens 23 is first performed to check whether normal projection operation can be executed (step B01).

  Here, the initial driving of the lens module of the projection lens 23 means that, for example, the zoom lens and the focus lens are independently operated in a predetermined direction over the entire stroke within the movable range, and correct feedback is obtained from the lens motor 26. The control unit 28 determines whether or not, for example, through the projection light processing unit 27.

  The initial setting of the projector apparatus 10 as a whole is, for example, storing the focus lens position (focus position) in the focus position storage unit 30 based on the driving of the lens motor 26, driving the light source lamp 19 to turn on the vicinity of the lamp. The presence / absence of a detected temperature from a temperature sensor (not shown) provided in the case, and the value when the detected temperature exists, the stored data of the control board on which the CPU in the control unit 28 is mounted are checked, and the result is obtained. Judgment.

  Accordingly, it is determined whether or not the initial setting of the entire apparatus 10 including the initial driving of the lens module of the projection lens 23 in Step B01 has been completed normally (Step B02).

  Here, if it is determined that the initial setting has been completed normally, there is no abnormality, so that an image signal is input from the input / output connector unit 11 and a corresponding optical image is formed and displayed by the micromirror element 17. Then, the projection operation for projecting from the projection lens 23 is started (step B03), and the processing of FIG. 3 is completed as described above, and the normal projection operation is shifted as it is.

If it is determined in step B02 that the initial setting of the entire apparatus 10 has not been completed normally, specifically,
The focus lens position (focus position) in the projection lens 23 cannot be stored in the focus position storage unit 30;
・ The temperature cannot be detected from the temperature sensor near the light source lamp 19.
The temperature detected by the temperature sensor near the light source lamp 19 is an abnormal value.
-The stored data of the control board on which the CPU in the control unit 28 is mounted is broken,
The correct feedback cannot be obtained from the lens motor 26 that drives the projection lens 23, and the lens module of the projection lens 23 is in error.
In such a case, it is assumed that there is no room for performing the focusing operation to obtain an accurate in-focus position of the projected image, and it has been out of the projection axis until then, or is in the projection optical axis. The so-called “narrowing” state, in which the aperture stop 24, which is in an open state and does not limit the amount of transmitted light flux, greatly limits the amount of transmitted light beam in the projection optical axis by narrowing the aperture diameter. (Step B04).

  In this way, by performing “squeezing” by the aperture stop 24, the projection light amount itself is reduced and a slightly dark image is obtained, but the depth of field is widened, so the projection lens 23 is placed on the screen surface to be projected. Even if it is not accurately focused, the range in which it can be determined that the focus is practically widens greatly, and the probability that the projected image can be recognized is higher.

  After that, the image signal of the error message fixedly stored in the program memory 29 is read out, a corresponding optical image is formed by the micromirror element 17 and projected from the projection lens 23 toward the screen to be projected. 3 (step B05), the processing in FIG. 3 is temporarily ended as described above, and the subsequent response is left to the user of the projector device 10.

  As described above, even when a problem occurs in a projection system member or the like, it is possible to promptly realize a state where it is easier to focus by increasing the depth of field of the projection image and executing the projection.

  Therefore, after promptly realizing a projection state that seems to have a high probability of being focused as described above, an error message is displayed to indicate that some abnormality has occurred in the apparatus. Action can be taken.

  The first and second embodiments have been described with respect to cases where the present invention is applied to a projector with a DLP (Digital Light Processing) (registered trademark) system, but the present invention is not limited to this. If the projector is equipped with an automatic focusing function in the projection optical system, a liquid crystal projector device that performs a projection operation using a transmissive color liquid crystal panel as a display element, or a monochrome liquid crystal display in a time-sharing manner using a primary color light source The present invention can be similarly applied to a field-sequentially driven liquid crystal projector device that transmits through a panel.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination according to a plurality of disclosed structural requirements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect can be obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

1 is a block diagram showing a functional configuration of an electronic circuit of a projector device according to a first embodiment of the present invention. The flowchart which shows the processing content after the power activation which concerns on the embodiment. 10 is a flowchart showing processing contents after power-on in a projector apparatus according to a second embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Input / output connector part, 12 ... Input / output interface (I / F), 13 ... Image conversion part, 14 ... Projection encoder, 15 ... Video RAM, 16 ... Projection drive part, 17 ... Micromirror element (SOM), 18 ... reflector, 19 ... light source lamp, 20 ... color wheel, 21 ... integrator, 22 ... mirror, 23 ... projection lens, 24 ... aperture stop, 25 ... motor (M), 26 ... lens motor (M) , 27 ... Projection light processing unit, 28 ... Control unit, 29 ... Program memory, 30 ... In-focus position storage unit, 31 ... Ranging processing unit, 32 ... Audio processing unit, 33 ... Ranging sensor, 34 ... Speaker, 35 ... key switch part, 36 ... Ir light receiving part SB ... system bus.

Claims (13)

A projection unit that forms an optical image corresponding to an input image signal, and projects the focused optical image on a projection target surface by an automatic focusing function that moves a focus lens position by driving a motor;
Focusing position storage means for storing a history of in-focus positions by the automatic focusing function;
A determination means for determining an abnormality of the device that occurs before the movement of the focus lens position by the automatic focusing function is completed;
Message storage means for storing a plurality of error message images corresponding to the abnormality of the device determined by the determination means;
The focus lens position of the projection unit is moved in accordance with the result of the focus position stored in the focus position storage unit according to the determination result by the determination unit, and the determination unit determines that there is an abnormality in the apparatus. A projection apparatus comprising: a projection control means for reading out and projecting an error message image corresponding to the contents from the message storage means .   The projection control means moves the focus lens position of the projection means in accordance with the latest focus position in the focus position history stored in the focus position storage means. Projection device.   The projection control means moves the focus lens position of the projection means according to the average of the latest predetermined number of focus positions in the focus position history stored in the focus position storage means. The projection apparatus according to claim 1.   The projection control means determines the focus lens position of the projection means according to the most frequently used out of the latest predetermined number of focus positions in the focus position history stored in the focus position storage means. The projection apparatus according to claim 1, wherein the projection apparatus is moved. A projection unit that forms an optical image corresponding to an input image signal, and projects the focused optical image on a projection target surface by an automatic focusing function that moves a focus lens position by driving a motor;
An aperture stop mechanism arranged detachably inserted into the projection optical axis of the projection means,
A determination means for determining an abnormality of the device that occurs before the movement of the focus lens position by the automatic focusing function is completed;
Message storage means for storing a plurality of error message images corresponding to the abnormality of the device determined by the determination means;
According to the determination result by the determination means, the aperture stop mechanism is inserted into the projection optical axis of the projection means, and an error message image corresponding to the content determined by the determination means that there is an abnormality in the apparatus is stored in the message A projection apparatus comprising projection control means for reading out and projecting from the means . A plurality of error message images corresponding to the abnormality of the device to be read and projected stored by the message storage means are:
6. The projection apparatus according to claim 1, further comprising an error message image corresponding to the fact that the focus lens position cannot be stored in the focus position storage means. A plurality of error message images corresponding to the abnormality of the device to be read and projected stored by the message storage means are:
The temperature of the vicinity of the light source lamp for projecting the optical image cannot be detected, or an error message image corresponding to the temperature being an abnormal value is included. Projection device. A plurality of error message images corresponding to the abnormality of the device to be read and projected stored by the message storage means are:
8. The projection apparatus according to claim 1, further comprising an error message image corresponding to the fact that the stored data of the projection control means is broken. A plurality of error message images corresponding to the abnormality of the device to be read and projected stored by the message storage means are:
9. The projection apparatus according to claim 1, further comprising an error message image corresponding to an error in the lens module moved by the motor. A projection unit that forms an optical image corresponding to an input image signal and projects the focused optical image on a projection target surface by an automatic focusing function that moves a focus lens position by driving a motor ; An abnormality control method in a projection apparatus including a message storage unit that stores a plurality of error message images corresponding to an abnormality,
A focus position storage step for storing a history of focus positions by the automatic focus function;
A determination step of determining an abnormality of the device that occurs before completion of movement of the focus lens position by the automatic focusing function;
According to the determination result in this determination step, the focus lens position of the projection unit is moved according to the in-focus position history stored in the in-focus position storage step, and the determination unit determines that there is an abnormality in the apparatus. And a projection control step of reading out and projecting an error message image corresponding to the content read from the message storage unit . A projection unit that forms an optical image corresponding to an input image signal and projects the focused optical image on a projection target surface by an automatic focusing function that moves a focus lens position by driving a motor ; A program executed by a computer incorporated in a projection apparatus including a message storage unit that stores a plurality of error message images corresponding to an abnormality ,
A focus position storage step for storing a history of focus positions by the automatic focus function;
A determination step of determining an abnormality of the apparatus that occurs before the movement of the focus lens position by the automatic focusing function is completed;
In accordance with the determination result in this determination step, the focus lens position of the projection unit is moved according to the focus position history stored in the focus position storage step, and it is determined in the determination step that there is an abnormality in the apparatus. A program for causing a computer to execute a projection control step of reading out and projecting an error message image corresponding to the read content from the message storage unit . A projection unit that forms an optical image corresponding to an input image signal and projects the formed optical image by focusing on the projection target surface by an automatic focusing function that moves a focus lens position by driving a motor, and the projection An abnormality control method in a projection apparatus comprising an aperture stop mechanism that is detachably disposed in the projection optical axis of the unit, and a message storage unit that stores a plurality of error message images corresponding to the abnormality of the apparatus,
A determination step of determining an abnormality of the device that occurs before completion of movement of the focus lens position by the automatic focusing function;
In response to the determination result by the determination means, the aperture stop mechanism is inserted into the projection optical axis of the projection means, and an error message image corresponding to the content determined by the determination means that there is an abnormality in the apparatus is stored in the message storage. A projection control step of reading out and projecting from the means;
An abnormality control method characterized by comprising: A projection unit that forms an optical image corresponding to an input image signal and projects the formed optical image by focusing on the projection target surface by an automatic focusing function that moves a focus lens position by driving a motor, and the projection A program executed by a computer built in a projection apparatus having an aperture stop mechanism detachably arranged in the projection optical axis of the unit and a message storage unit for storing a plurality of error message images corresponding to the abnormality of the apparatus Because
A determination step of determining an abnormality of the apparatus that occurs before the movement of the focus lens position by the automatic focusing function is completed;
According to the determination result of the determination step, the aperture stop mechanism is inserted into the projection optical axis of the projection unit, and an error message image corresponding to the content determined to be abnormal by the determination step is stored in the message A projection control step for reading out and projecting from the unit;
A program that causes a computer to execute.

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