Video display apparatus and adjustment method thereof

Abstract

To provide a video display device capable of suppressing occurrence of adjustment deviation in diopter adjustment with a relatively simple configuration.SOLUTION: The video display apparatus includes video display units 102a and 102b, optical elements 103a and 103b, and movement driving unit 12 that changes relative positions of video display units 102a and 102b and optical elements 103a and 103b, and movement driving unit 12 determines a stop index position corresponding to a timing at which a user performs an operation of stopping movement driving unit 12, and sets a relative position by returning to the stop index position from a state of exceeding the stop index position with the stop index position as a target.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a video display device and an adjustment method thereof. [Background technology]

[0002] Image display devices include those worn on the user's head and those worn like glasses. In image display devices, a display unit is placed near the user's eyes, and parallax images are displayed for each of the user's left and right eyes. The parallax images contain depth information indicating whether the user is looking at something far away or close up, and by viewing the displayed parallax images, the user can obtain a three-dimensional image of the object displayed in the parallax images.

[0003] In this image display device, the user's line of sight is adjusted to the position of the stereoscopic image generated by the images displayed for each of the left and right eyes. At this time, the focal position is fixed to each of the left and right images on the display screen. This results in an unnatural state that would not occur when viewing a real object. For this reason, technologies such as those described in Patent Document 1 have been developed. In Patent Document 1, the diopter adjustment for depth information corresponding to the position of the user's point of gaze when viewing an image is performed by driving optical elements included in the display optical system in accordance with individual differences and the usage status of the image display device. This makes it possible to reduce the sense of discomfort felt during stereoscopic viewing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-32278 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when driving the optical element for diopter adjustment as in Patent Document 1, even if the moving optical element is stopped at the correct position, an overrun inevitably occurs and the optical element is set at a position that is shifted from the correct position. This causes a problem of misalignment during diopter adjustment, making it impossible to display a clear image.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide an image display device and an adjustment method therefor that have a relatively simple configuration, suppress the occurrence of adjustment deviations in diopter adjustment, and are capable of displaying clear images. [Means for solving the problem]

[0007] The image display device of the present disclosure includes an image display unit, an optical element, and a movement drive unit that changes the relative position between the image display unit and the optical element. The movement drive unit determines a stop index position corresponding to the timing of a stop operation, and sets the relative position with the stop index position as a target.

[0008] The method for adjusting an image display device disclosed herein uses a moving drive unit that changes the relative position between the image display unit and the optical element, determines a stop index position corresponding to the timing when the moving drive unit is stopped, and sets the relative position using the stop index position as a target. [Effects of the Invention]

[0009] According to the present disclosure, an image display device is realized that has a relatively simple configuration, is capable of suppressing the occurrence of adjustment deviations during diopter adjustment, and is capable of displaying clear images. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a schematic configuration of a video display device according to a first embodiment. [Figure 2] 4A and 4B are schematic diagrams for explaining a state when an optical element is moved by a diopter change drive unit of the image display device according to the first embodiment. [Figure 3] 3 is a block diagram showing an operation circuit of a diopter change drive unit of the image display device according to the first embodiment. FIG. [Figure 4] 5 is a flowchart showing a method for adjusting visibility in the image display device according to the first embodiment. [Figure 5] 10 is a timing chart when a button SW3 is pressed on the calibration controller in the first embodiment. [Figure 6] FIG. 2 is a schematic diagram showing a schematic configuration of a video display device according to a comparative example of the first embodiment. [Figure 7] 10 is a timing chart when a button SW3 is pressed on the calibration controller in a comparative example of the first embodiment. [Figure 8] 10 is a flowchart showing a method for adjusting visibility in an image display device according to a modified example of the first embodiment. [Figure 9] FIG. 10 is a schematic diagram showing a schematic configuration of a video display device according to a second embodiment. [Figure 10] 10 is a flowchart showing a method for adjusting visibility in an image display device according to a second embodiment. [Figure 11] 10 is a timing chart when a button SW3 is pressed on the calibration controller in the second embodiment. [Figure 12] FIG. 10 is a schematic diagram showing a schematic configuration of a video display device according to a third embodiment. [Figure 13] 10 is a flowchart showing a method for adjusting visibility in an image display device according to a third embodiment. [Figure 14] 13 is a timing chart when a button SW3 is pressed on the calibration controller in the third embodiment. [Figure 15] FIG. 10 is a schematic diagram showing a schematic configuration of a video display device according to a fourth embodiment. [Figure 16] 10 is a flowchart showing a method for adjusting visibility in an image display device according to a fourth embodiment. [Figure 17]13 is a timing chart when a lever of an operation unit is operated by a calibration controller in the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] -Basic configuration of the image display device in various embodiments- Before specifically disclosing the embodiments, the basic configuration of the image display device in each embodiment will be described.

[0012] The image display device according to the present disclosure includes an image display unit, an optical element, and a movement drive unit that changes the relative position between the image display unit and the optical element. The movement drive unit determines a stop index position corresponding to the timing of a stop operation and sets the relative position between the image display unit and the optical element using this stop index position as a target. Even if the movement drive unit is stopped, it cannot actually stop at the position corresponding to the stop operation, and a deviation occurs due to overrun. Therefore, in the present disclosure, after overrun, the movement drive unit performs a movement operation using the determined stop index position as a target. Specifically, the movement drive unit returns from a state beyond the stop index position to the stop index position, thereby setting the relative position between the image display unit and the optical element. By performing the stop operation in this manner, a relative position that minimizes diopter deviation and is adapted to the user's diopter can be easily and reliably set. An image display device having this configuration will be described in detail in the first embodiment.

[0013] In the present disclosure, based on the basic configuration of the image display device described above, it is proposed to set the relative position more precisely and accurately as follows.

[0014] (1) When diopter adjustment is performed by a user's stop operation, even if the user stops the moving drive unit when the user determines that the best diopter adjustment state is observed, a predetermined time is inevitably required from the time of the determination to the time of the stop operation. The stop position will be shifted from the stop indicator position by a distance (delay distance) corresponding to this predetermined time. Therefore, in the present disclosure, the moving drive unit sets the relative position of the image display unit and the optical element at a position obtained by subtracting the delay distance corresponding to the delay in the user's stop operation from the position where the user's stop command was received. This configuration realizes diopter adjustment that takes into account the delay in the user's stop operation, and further enables easy and reliable setting of a relative position with minimal diopter shift. An image display device having this configuration will be described in detail in the second embodiment.

[0015] (2) A detailed look at a stop operation includes a start operation, an intermediate operation, and an end operation. For example, if the stop operation is a button press, the series of operations from the start to the end of the press constitutes the stop operation, and this series of operations necessarily requires a predetermined time. Therefore, when adjusting the diopter through a user's stop operation, even if the user stops the movement drive unit when the user determines that the best diopter adjustment state is achieved, the stop position will be offset from the stop indicator position by a distance equivalent to this predetermined time (the stop operation equivalent distance). Furthermore, since the above-mentioned predetermined time varies depending on the individual user, the stop operation equivalent distance also varies from user to user. Therefore, in the present disclosure, the movement drive unit acquires the stop operation equivalent distance using the predetermined time during which the user performs the stop operation, and sets the relative position of the image display unit and the optical element at the position where the user received the stop command minus the stop operation equivalent distance as the stop indicator position. This configuration realizes diopter adjustment that takes into account the time required for the series of operations required for the user's stop operation, and further enables easy and reliable setting of a relative position with minimal diopter offset. A video display device having this configuration will be described in detail in the third embodiment.

[0016] (3) A specific example of the stop operation is, in addition to pressing a button as described in (2), an operation using a tilt lever on the operating unit. In this case, the stop operation is the series of actions from tilting the lever to returning it to its non-tilted state, and this series of actions necessarily requires a predetermined time. Therefore, when adjusting the diopter by the user's stop operation, even if the user stops the movement drive unit when the user determines that the best diopter adjustment state is observed, the stop position will be shifted from the stop indicator position by a distance equivalent to this predetermined time (the stop operation equivalent distance). However, in this case, the user's action in the stop operation is simply to release the lever when the user determines that the best diopter adjustment state is observed, and the lever then automatically returns to its non-tilted state. Therefore, the predetermined time required for the lever to return from its tilted state to its non-tilted state is approximately constant regardless of the user. In the present disclosure, the movement drive unit obtains the distance equivalent to the stop operation using the release position when the operation unit has completed the stop operation, and sets the relative position of the image display unit and the optical element at a position obtained by subtracting the distance equivalent to the stop operation from the release position. With this configuration, the predetermined time is a substantially constant value regardless of the user, so it is possible to determine the stop index position with a relatively simple calculation using a constant, and it is possible to easily and reliably set a relative position with little diopter shift. An image display device having this configuration will be described in detail in the fourth embodiment.

[0017] -Specific Description of Various Embodiments- Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the following embodiments do not limit the invention according to the claims. Although multiple features are described in the various embodiments, not all of these multiple features are necessarily essential, and multiple features may be combined arbitrarily. Furthermore, in the drawings, the same reference numerals are used to designate the same or similar components, and redundant explanations will be omitted.

[0018] [First embodiment] A first embodiment of the present disclosure will be described below.

[0019] (Configuration of video display device) 1A and 1B are schematic diagrams showing the general configuration of an image display device according to a first embodiment, in which (a) is a diagram showing the entire device, and (b) is a side view of a calibration controller 112. FIG.

[0020] This image display device includes image display means 11 for displaying an image and movement drive means 12. The image display device, excluding a calibration controller 112 described later, can be used in two forms: one worn on the user's head, and the other worn like glasses. In either form, the image display device can be fixed near the user's left eye 2a and right eye 2b. The user's left eye is designated 2a and right eye is designated 2b, and the symbols a and b are added to the reference numerals of the components related to the left eye 2a and the components related to the right eye 2b, respectively, to distinguish between them.

[0021] The image display means 11 includes an image acquisition section 100, a display processing section 101, a pair of image display sections 102a and 102b, and a pair of optical elements 103a and 103b. The image acquisition unit 100 acquires image data for display via an external device, a network, or the like. The display processing unit 101 performs processing such as adjusting the display magnification of the image data acquired by the image acquisition unit 100. The image display units 102a and 102b receive the image data processed by the display processing unit 101 and display the image. For example, the image data may be divided into separate image data for the image display units 102a and 102b and displayed. This configuration is not limited to this, and a configuration in which the screen of a single image display unit is divided into two and image data is displayed on the divided screens may also be used. This image processing tailored to the right and left eyes allows the user to view the image without any discomfort. The optical elements 103a and 103b have lenses corresponding to the left eye 2a and the right eye 2b, respectively. The images displayed on the image display units 102a and 102b are displayed on the left eye 2a and the right eye 2b through the optical elements 103a and 103b.

[0022] Movement driving means 12 is a movement driving unit that changes the relative positions of image display units 102a, 102b and optical elements 103a, 103b, and in this embodiment moves optical elements 103a, 103b relative to image display units 102a, 102b. Movement driving means 12 has diopter change driving units 104a, 104b, diopter change instruction unit 106, driving units 108a, 108b, calibration controller 112, signal processing unit 113, and position storage units 114a, 114b that are first storage units.

[0023] Diopter change drivers 104a and 104b have vibration actuators with drive sources such as ultrasonic motors, and are connected to optical elements 103a and 103b, respectively, to move optical elements 103a and 103b. Optical elements 103a and 103b are moved within sections (illustrated by arrows 104a1 and 104b1) along their optical axes by diopter change drivers 104a and 104b. Diopter change drivers 104a and 104b each have a position detection sensor, which acquires position information of optical elements 103a and 103b within that section.

[0024] The diopter change instruction unit 106 receives an electrical signal from the signal processing unit 113 and issues instructions to the left eye side driver 108a and the right eye side driver 108b. The drivers 108a and 108b each receive a drive signal from the diopter change instruction unit 106 and drive the diopter change driver units 104a and 104b based on the drive signals.

[0025] The calibration controller 112 adjusts the diopter of the user by moving and stopping the optical elements 103a and 103b based on the user's operation. The calibration controller 112 has at least buttons SW1, SW2, and SW3. Button SW1 is a switch that starts the calibration operation. Button SW2 is a switch that starts driving the diopter change drive units 104a and 104b. Button SW3 is a switch that stops driving the diopter change drive units 104a and 104b at the stop position.

[0026] In the movement driving means 12, the calibration controller 112 can be electrically connected to and separated from a signal processing unit 113 that processes electrical signals transmitted from the calibration controller 112. With this configuration, when a user observes an image on the image display device, the calibration controller 112 can be separated and only the device main body can be used, which contributes to user convenience.

[0027] The position storage units 114a and 114b store the stop index positions of the optical elements 103a and 103b caused by the vibration actuators 104a and 104b at the timing when the button SW3 of the calibration controller 112 is pressed by the user.

[0028] In the above-mentioned image display means 11 and movement driving means 12, the image acquisition unit 100, display processing unit 101, driving units 108a, 108b, and signal processing unit 113 are realized by one or more processors such as a central processing unit (CPU) reading and executing programs.

[0029] 2A and 2B are schematic diagrams for explaining the state when the optical elements 103a and 103b are moved by the diopter change driving units 104a and 104b, respectively. (a) shows the state when the optical elements 103a and 103b are moved to the vicinity of the image display units 102a and 102b, respectively, and (b) shows the state when the optical elements 103a and 103b are moved to the vicinity of the eyes 2a and 2b, respectively.

[0030] When a user of the image display device, who is an observer, views the image display units 102a and 102b with their eyes 2a and 2b through the optical elements 103a and 103b, they will see virtual images 105a and 105b. The positions of the virtual images 105a and 105b in the directions of the optical axes 103a1 and 103b1, based on the positions of the user's eyes 2a and 2b, are defined as the virtual image formation position i.

[0031] As shown in Figures 2(a) and 2(b), the virtual image formation position i can be changed by changing the positions of the optical elements 103a and 103b. For example, as the optical elements 103a and 103b move closer to the image display units 102a and 102b, the virtual image formation position i moves closer to the eyes 2a and 2b. Conversely, as the optical elements 103a and 103b move closer to the eyes 2a and 2b, the virtual image formation position i moves farther away from the eyes 2a and 2b. Therefore, by moving the lenses 103a and 103b using the diopter change drivers 104a and 104b, diopter adjustment, i.e., matching the visual acuity of the user's eyes 2a and 2b, enables images of distant and nearby objects to be viewed without blurring. Note that the displayed image contains depth information, indicating whether the point of gaze is near or far. When this depth information matches the viewer's diopter, the image appears clear to the user.

[0032] FIG. 3 is a block diagram showing the operation circuit of the diopter change driving units 104a and 104b. Each of the diopter changing drive units 104a and 104b includes a vibration type actuator 104, a position detection unit 120, and a vibration type drive device 200.

[0033] The vibration actuator 200 has a control unit 210 and a drive unit 220. The control unit 210 outputs a control signal that controls the driving of the vibration actuator 104. The drive unit 220 outputs an AC signal as a drive signal that drives the vibration actuator 104, based on the control signal output from the control unit 210.

[0034] The control unit 210 has a command position generation unit 301, a control amount calculation unit 302, a phase difference conversion unit 303, a frequency conversion unit 304, and a pulse width conversion unit 305. The drive unit 220 has an AC signal generation unit 309 and a voltage step-up unit 310. Each unit constituting the control unit 210 performs a specific operation according to the output (control signal). The control unit 210 is a so-called microcomputer, and has electrical components such as a central processing unit (CPU), a memory for storing programs, and a memory as a work area where the programs are expanded. The control unit 210 generates an electrical signal having information for controlling the drive of the vibration actuator 104.

[0035] The position detection unit 120 is, for example, an encoder, and detects the position of the moving body of the vibration actuator 104 (here, the optical element 103 connected to the vibration actuator 104). The command position generation unit 301 generates a command position for moving the moving body of the vibration actuator 104. An electrical signal relating to the deviation between the command position output from the command position generation unit 301 and the output of the position detection unit 120 is input to the control calculation unit 302.

[0036] (Method for adjusting visibility in image display device) A method for adjusting the visibility in the image display device according to this embodiment will be described below. Fig. 4 is a flowchart showing a method for adjusting the diopter in the image display device according to this embodiment. Fig. 5 is a timing chart showing when button SW3 is pressed in calibration controller 112. Fig. 5 shows the voltage, phase difference, pulse width, actuator speed, and position of the optical element including the stop position of SW3.

[0037] To perform calibration according to this embodiment, the user starts the calibration operation by pressing button SW1 of calibration controller 112. At this time, image display means 11 displays images for calibration on image display sections 102a and 102b (F-01).

[0038] Next, the user presses the button SW2 of the calibration controller 112. This causes the movement driving means 12 to drive the diopter change driving units 104a and 104b to adjust the diopter (F-02).

[0039] While viewing the image on the image display means 11, the user searches for the position where the diopter is adjusted (the position where the image is in focus and easy to observe), and when the position where the image is easiest to observe is reached, the user presses the button SW3. This causes the movement drive means 12 to send an electrical signal as a stop command to the diopter change drive units 104a and 104b. At the same time, the actuator position (the position of the optical elements 103a and 103b relative to the image display units 102a and 102b) at the time when the button SW3 is pressed is stored in the position memory units 114a and 114b as stop position 1, which is a stop index position (F-03).

[0040] Even if the diopter change drive units 104a and 104b receive a stop command and stop driving the actuators, the optical elements 103a and 103b cannot stop immediately due to inertia. In this case, overrun of the optical elements 103a and 103b inevitably occurs between the time the stop command is received and the time the optical elements 103a and 103b stop. In this embodiment, the movement drive means 12 drives the actuators of the diopter change drive units 104a and 104b in the reverse direction after receiving the stop command. The movement drive means 12 uses the information on stop position 1 stored in the position memory units 114a and 114b to return the distance overrun by the diopter change drive units 104a and 104b. The optical elements 103a and 103b move to stop position 1 and stop (F-04).

[0041] In this manner, the diopters of the right eye 2b and the left eye 2a of the user are adjusted simultaneously in the image display device.

[0042] In this embodiment, ultrasonic motors are used as actuators for the diopter change drivers 104a and 104b. In this case, by reversing the phase difference of the drive waveforms during reverse drive, a drive force in the opposite direction is generated, and the optical elements 103a and 103b can move in the opposite direction at high speed after they have stopped moving.

[0043] Here, a comparative example of this embodiment will be described. 6 is a schematic diagram showing the general configuration of an image display device according to a comparative example, where (a) is an overall view of the device and (b) is a side view of the calibration controller 112. In FIG. 6, the same components as those in FIG. 1 are given the same reference numerals, and detailed explanations will be omitted. FIG. 7 is a timing chart when button SW3 is pressed on the calibration controller 112 in the comparative example. FIG. 7 shows the voltage, phase difference, pulse width, actuator speed, and position of the optical element including the stop position of SW3.

[0044] In this comparative example, the phase difference and pulse width of the AC signal are controlled to become zero when button SW3 is pressed, and the actuator speed is decelerated. However, because the stopping operation begins the moment button SW3 is pressed, an overrun actually occurs, causing a problem in that the position at which button SW3 was pressed deviates. When an overrun occurs, a position that deviates from the appropriate stopping position seen by the user on the video display device is set as the adjustment position.

[0045] In contrast to this, in this embodiment, the movement drive means 12 operates to return the overrunning optical elements 103a and 103b to the stop position 1 at the timing when the button SW3 was pressed. This cancels out the overrun that occurred after the button SW3 was pressed, and the optical elements 103a and 103b stop at a position as close as possible to the stop position set by the user, enabling the user to make optimal image adjustments.

[0046] As described above, according to this embodiment, an image display device that can suppress the occurrence of adjustment deviations in diopter adjustment and display clear images can be realized with a relatively simple configuration.

[0047] [Variations] A modified example of this embodiment will be described below, which discloses an image display device configured to accommodate users with different visual acuity between their left and right eyes.

[0048] The image display device of this modified example has the same schematic configuration as that of Fig. 1 described in the first embodiment. In this modified example, in the calibration controller 112, for example, first, by pressing the button SW1 twice in succession, the image display device is set to the left eye side adjustment mode. By pressing the button SW1 three times in succession, the image display device is set to the right eye side adjustment mode. For example, by pressing the button SW1 four times in succession (or by pressing the button SW2 once), the image display device is set to the both eye adjustment mode as in the first embodiment.

[0049] A method for adjusting the visibility in the image display device according to this modified example will be described below. FIG. 8 is a flowchart showing a method for adjusting the diopter in the image display device according to a modified example of the first embodiment, where (a) corresponds to the left eye side adjustment mode and (b) corresponds to the right eye side adjustment mode.

[0050] <Left eye adjustment mode> 8(a), to perform calibration for the left eye side, the user first presses the button SW1 of the calibration controller 112 twice in succession, thereby setting the image display device to the left eye side adjustment mode (F-21).

[0051] Next, the user presses the button SW1 once after a predetermined time to start the calibration operation in the left eye adjustment mode. At this time, the image display means 11 displays the image for calibration only on the image display section 102a (F-22). No image is displayed on the image display section 102b.

[0052] Next, the user presses the button SW2 on the calibration controller 112. This causes the movement drive means 12 to drive the diopter change drive unit 104a to adjust the diopter of the left eye 2a (F-23). ​​The diopter change drive unit 104b is not driven.

[0053] While viewing the image on the image display means 11, the user searches for a position where the diopter is adjusted for the left eye 2a (a position where the image is in focus and easy to observe), and when the position where observation is easiest is reached, the user presses the button SW3. This causes the movement drive means 12 to send an electrical signal as a stop command to the diopter change drive unit 104a. At the same time, the actuator position (the position of the optical element 103a relative to the image display unit 102a) at the time when the button SW3 is pressed is stored in the position memory unit 114a as the stop position 1a, which is the stop index position (F-24).

[0054] Even if the diopter change drive unit 104a receives a stop command and stops driving the actuator, the optical element 103a cannot be stopped immediately due to inertia. In this case, an overrun of the optical element 103a inevitably occurs between the time the stop command is received and the time the optical element 103a stops. In this modified example, the movement drive means 12 drives the actuator of the diopter change drive unit 104a in the reverse direction after receiving the stop command. The movement drive means 12 uses information about the stop position 1a stored in the position memory unit 114a to return the distance that the diopter change drive unit 104a overran. The optical element 103a moves to the stop position 1a and stops (F-25).

[0055] <Right eye adjustment mode> 8(b), to perform calibration for the right eye side, the user first presses the button SW1 of the calibration controller 112 three times in succession, thereby setting the image display device to the right eye side adjustment mode (F-31).

[0056] Next, the user presses the button SW1 once after a predetermined time to start the calibration operation in the right eye adjustment mode. At this time, the image display means 11 displays the image for calibration only on the image display section 102b (F-32). No image is displayed on the image display section 102a.

[0057] Next, the user presses the button SW2 on the calibration controller 112. This causes the movement drive means 12 to drive the diopter change drive unit 104b to adjust the diopter of the right eye 2b (F-33). The diopter change drive unit 104a is not driven.

[0058] While viewing the image on the image display means 11, the user searches for a position where the diopter is adjusted for the right eye 2b (a position where the image is in focus and easy to observe), and when the position where observation is easiest is reached, the user presses the button SW3. This causes the movement drive means 12 to send an electrical signal as a stop command to the diopter change drive unit 104b. At the same time, the actuator position (the position of the optical element 103b relative to the image display unit 102b) at the time when the button SW3 is pressed is stored in the position memory unit 114b as the stop position 1b, which is the stop index position (F-34).

[0059] Even if the diopter change drive unit 104b receives a stop command and stops driving the actuator, the optical element 103b cannot be stopped immediately due to inertia. In this case, an overrun of the optical element 103b inevitably occurs between the time the stop command is received and the time the optical element 103b stops. In this modified example, the movement drive means 12 drives the actuator of the diopter change drive unit 104b in the reverse direction after receiving the stop command. The movement drive means 12 uses information about the stop position 1b stored in the position memory unit 114b to return the distance that the diopter change drive unit 104b overran. The optical element 103b moves to the stop position 1b and stops (F-35).

[0060] In this modified example, the adjustment mode is changed using the button SW1 of the calibration controller 112 according to the first embodiment, but the present invention is not limited to this. For example, a switch for changing the adjustment mode may be provided in addition to the buttons SW1 to SW3, and the left eye side adjustment mode, right eye side adjustment mode, or both eyes adjustment mode may be set using this switch.

[0061] In this manner, the diopter of the image display device is adjusted independently for the right eye 2b and the left eye 2a of the user in turn.

[0062] According to this modified example, an image display device is realized that has a relatively simple configuration and can perform accurate diopter adjustment for each eye, even if the user has a difference in vision between their left and right eyes, suppress the occurrence of adjustment errors during diopter adjustment, and display clear images.

[0063] [Second embodiment] Next, a second embodiment of the present disclosure will be described. FIG. 9 is a schematic diagram showing the overall configuration of an image display device according to this embodiment, where (a) is an overall view of the device and (b) is a side view of the calibration controller 112. In FIG. 9, the same components as those in FIG. 1 are given the same reference numerals, and detailed explanations will be omitted. FIG. 10 is a flowchart showing a method for adjusting the diopter in the image display device according to this embodiment. FIG. 11 is a timing chart showing when button SW3 is pressed on the calibration controller 112. FIG. 11 shows the voltage, phase difference, pulse width, actuator speed, and position of the optical element including the stop position of SW3.

[0064] (Configuration of video display device) In the image display device according to this embodiment, as shown in Fig. 9(a), the movement driving means 12 has driving parameter storage units 115a and 115b as second storage units instead of the position storage units 114a and 114b in Fig. 1 of the first embodiment. The movement driving means 12 further has a calculation unit 116.

[0065] The drive parameter storage units 115a and 115b store various drive parameters, such as the actuator speed, which is the movement speed of the optical elements 103a and 103b, drive frequency, phase difference, and pulse width, in addition to the stop positions 1 of the optical elements 103a and 103b. The various drive parameters stored in the drive parameter storage units 115a and 115b also include parameters that represent the user's personal characteristics (age, habits, etc.) in numerical form. Here, the actuator speed, drive frequency, phase difference, and pulse width are the respective values ​​when the vibration actuators 104a and 104b receive a stop instruction by pressing button SW3 of the calibration controller 112. The parameters of the user's personal characteristics are numerical values ​​that the user inputs into the video display device in advance.

[0066] The calculation unit 116 uses various drive parameters stored in the drive parameter storage units 115a and 115b to calculate stop position 2, which is a more appropriate stop index position for the optical elements 103a and 103b. Information on the calculated stop position 2 is stored in the drive parameter storage units 115a and 115b.

[0067] (Method for adjusting visibility in image display device) A method for adjusting the visibility in the image display device according to this embodiment will be described below. To perform calibration according to this embodiment, the user starts the calibration operation by pressing button SW1 of calibration controller 112. At this time, image display means 11 displays images for calibration on image display sections 102a and 102b (F-01).

[0068] Next, the user presses the button SW2 of the calibration controller 112. This causes the movement driving means 12 to drive the diopter change driving units 104a and 104b to adjust the diopter (F-02).

[0069] While viewing the image on the image display means 11, the user searches for the position where the diopter is adjusted (the position where the image is in focus and easy to observe), and when the position where the image is easiest to observe is reached, the user presses button SW3. This causes the movement drive means 12 to send an electrical signal as a stop command to the diopter change drive units 104a and 104b. At the same time, various drive parameters such as stop position 1, which is the actuator position at the time when button SW3 is pressed, speed, drive frequency, phase difference, pulse width, and the user's personal characteristics are stored in drive parameter storage units 115a and 115b (F-05). Note that the user's personal characteristics (predetermined values ​​related to age, habits, etc.) are stored in advance, for example, in drive parameter storage units 115a and 115b as appropriate.

[0070] Even if the user presses button SW3 when viewing the image on the image display unit 11 and visually confirms the diopter adjustment, there is inevitably a delay between the time of viewing and the time of pressing. Therefore, in reality, the position when button SW3 is pressed (hereinafter referred to as stop position 1) is shifted by a distance equivalent to this delay (delay-equivalent distance) from the position when the diopter adjustment is visually confirmed (hereinafter referred to as stop position 2). In this embodiment, the delay-equivalent distance due to the user's operation delay is taken into consideration. The calculation unit 116 calculates a return amount α1, which is the delay-equivalent distance, using various drive parameters, such as the actuator drive speed, drive frequency, phase difference, and pulse width, as well as the user's personal characteristics, when button SW3 is pressed and a stop command is received (F-06). Information about the determined stop position 2 is stored in the drive parameter storage units 115a and 115b. By performing calculations using various drive parameters in this manner, the return amount α1 can be obtained as accurately as possible.

[0071] The return amount α1 and the stop position 2 are expressed as follows: α1=V×N Stop position 2 = Stop position 1-α1 Here, V is the drive speed of the actuator when button SW3 is pressed and a stop command is received, and N is a coefficient determined from the drive frequency, phase difference, pulse width, etc., and the individual characteristics of the user.

[0072] Next, the movement driving means 12 reverses the actuators of the diopter change driving units 104a and 104b from stop position 2 where the stop command was received. Using the information on stop position 2 calculated and stored in F-06, the movement driving means 12 causes the diopter change driving units 104a and 104b to return the distance that the optical elements 103a and 103b have overrun. The optical elements 103a and 103b move to stop position 2 and stop (F-07).

[0073] In this manner, the diopters of the right eye 2b and the left eye 2a of the user are adjusted simultaneously in the image display device.

[0074] As described above, in this embodiment, the movement drive means 12 drives the overrunning optical elements 103a and 103b to return to the stop position 2 calculated using various drive parameters and set when the user visually recognized the diopter adjustment. This offsets the overrun that occurred after the user visually recognized the diopter adjustment, and stops the optical elements 103a and 103b at a position as close as possible to the position where the user wants to stop them, enabling optimal image adjustment for the user.

[0075] As described above, according to this embodiment, an image display device that can suppress the occurrence of adjustment deviations in diopter adjustment and display clear images can be realized with a relatively simple configuration.

[0076] In this embodiment, as in the modified example of the first embodiment, the diopter adjustment may be performed independently for the right eye 2b and the left eye 2a of the user in sequence. In this case, even if there is a difference in visual acuity between the left and right eyes of the user, accurate diopter adjustment can be performed for each eye, and deviations in the diopter adjustment can be suppressed, allowing for clear images to be displayed.

[0077] [Third embodiment] Next, a third embodiment of the present disclosure will be described. FIG. 12 is a schematic diagram showing the overall configuration of an image display device according to this embodiment, where (a) is an overall view of the device and (b) is a side view of the calibration controller 112. In FIG. 12, the same components as those in FIG. 1 are given the same reference numerals, and detailed explanations will be omitted. FIG. 13 is a flowchart showing a method for adjusting the diopter in the image display device according to this embodiment. FIG. 14 is a timing chart showing when button SW3 is pressed on the calibration controller 112 in this embodiment. (a) shows the voltage, phase difference, pulse width, actuator speed, and position of the optical element including the stop position of SW3, and (b) shows an enlarged view of SW3 and its position.

[0078] (Configuration of video display device) 9 in the second embodiment, an analog processing unit 117 is provided to more precisely detect the on / off operation of the button SW3. The calculation unit 116 detects the time interval T during which the user operates the button SW3, and determines the stop position 3, which is the stop index position, according to the time interval T.

[0079] (Method for adjusting visibility in image display device) A method for adjusting the visibility in the image display device according to this embodiment will be described below. To perform calibration according to this embodiment, the user starts the calibration operation by pressing button SW1 of calibration controller 112. At this time, image display means 11 displays images for calibration on image display sections 102a and 102b (F-01).

[0080] Next, the user presses the button SW2 of the calibration controller 112. This causes the movement driving means 12 to drive the diopter change driving units 104a and 104b to adjust the diopter (F-02).

[0081] The analog processing unit 117 detects the voltage (switch voltage) while the button SW3 is pressed as an analog voltage. The drive parameter storage units 115a and 115b store time information and the switch voltage for a predetermined period detected using the analog processing unit 117, even while the diopter change drive units 104a and 104b are driving and the optical elements 103a and 103b are moving (F-08). In this embodiment, the switch voltage before pressing the button SW3 is started is set to Vd, and the switch voltage after pressing is stopped is set to V0.

[0082] While viewing the image on the image display means 11, the user searches for the position where the diopter is adjusted (the position where the image is in focus and easy to observe), and when the position where observation is easiest is reached, the user presses the button SW3. This causes the movement drive means 12 to send an electrical signal as a stop command to the diopter change drive units 104a and 104b. In the analog processing unit 117, the moment when the switch voltage becomes V0 (when the press ends) is the moment when the button SW3 is pressed.

[0083] The calculation unit 116 calculates the time interval T between the time information when the button SW3 starts to be pressed and the time information when the button SW3 stops being pressed, which are stored in the drive parameter storage units 115a and 115b, which are the third storage units (F-09). Here, the time information when the button SW3 starts to be pressed is the time when the switch voltage starts to drop from Vd, and the time information when the button SW3 stops being pressed is the time when the switch voltage drops to V0.

[0084] In this embodiment, the time interval T from when the user starts to press the button SW3 as a stop operation until when he or she finishes pressing it is the time interval required for switching the button SW3. If the position at the time when the button SW3 starts to be pressed is defined as stop position 3, stop position 3 is shifted by a distance equivalent to the time interval T, which is the operation time, from the detected position at the time when the button SW3 stops being pressed (the position at the timing when the button SW3 is pressed). In this embodiment, taking into account the time required for the switch operation, the calculation unit 116 calculates the return amount α2, which is the distance equivalent to the stop operation during the time interval T, to determine stop position 3 (F-10). Information about the determined stop position 3 is stored in the drive parameter storage units 115a and 115b.

[0085] Specifically, when the time interval is T, the return amount α2 and the stop position 3 are expressed as follows: α2=V×N×T×T0 Stop position 3 = detection position - α2 Here, V is the actuator drive speed at the time when the button SW3 has finished being pressed for the time interval T (the speed at the timing when the button SW3 is pressed), N is the speed coefficient, and T0 is the time coefficient.

[0086] The time interval T may differ depending on the user. Assume that the diopter is the same (stop position 3 is the same) but the time interval T is different. In FIG. 14(b), T1 indicates the switching time interval when button SW3 is pressed for a short time (shown by the solid line in the figure), and T2 indicates the switching time interval when button SW3 is pressed for a long time (shown by the dashed dotted line in the figure). The position when button SW3 stops being pressed during time interval T1 is defined as detection position A, and the position when button SW3 stops being pressed during time interval T2 is defined as detection position B.

[0087] During the time interval T1, the return amount α21 and the stop position 3 are expressed as follows: α21=V1×N×T1×T0 Stop position 3 = Detection position A-α21 During the time interval T2, the return amount α22 and the stop position 3 are expressed as follows: α22=V2×N×T2×T0 Stop position 3 = Detection position B-α22 Here, V1 and V2 are the drive speeds of the actuator at the time when the button SW3 has finished being pressed for the time intervals T1 and T2 (the speeds at the timing when the button SW3 is pressed).

[0088] Next, the movement driving means 12 reverses the actuators of the diopter change driving units 104a and 104b from stop position 1 where the stop command was received. Using the information on stop position 3 calculated and stored in F-10, the diopter change driving units 104a and 104b move and stop the optical elements 103a and 103b to stop position 3 so as to return the distance that the optical elements 103a and 103b overran (F-11).

[0089] In this manner, the diopters of the right eye 2b and the left eye 2a of the user are adjusted simultaneously in the image display device.

[0090] In this embodiment, the movement drive means 12 drives the optical elements 103a and 103b that have overrun to return to stop position 3, which is the position at the time when the button SW3 started to be pressed, calculated using various drive parameters. In this way, the optical elements 103a and 103b are returned by a distance equivalent to the overrun that occurred from the time when the button SW3 started to be pressed, without being affected by the time required for switching, and the diopter adjustment position can be set to stop position 3. This stops the optical elements 103a and 103b at a position as close as possible to the position at which the user wants to stop them, enabling the user to make optimal image adjustments.

[0091] As described above, according to this embodiment, an image display device that can suppress the occurrence of adjustment deviations in diopter adjustment and display clear images can be realized with a relatively simple configuration.

[0092] In this embodiment, too, as in the second embodiment, it is possible to take into consideration the operation delay from the time when the diopter adjusted state is visually recognized until the button SW3 actually starts to be pressed. For example, in the above-mentioned adjustment method, a position further shifted by a distance corresponding to the delay time from the stop position 3, which is the position at the time when the button SW3 starts to be pressed, is set as the stop index position (= stop position 3 - return amount α1). That is, in F-10, Stop index position = Stop position 3-α1 =Detection position - α2 - α1 Get.

[0093] Then, in F-11, the diopter change drive units 104a and 104b return the overrunning optical elements 103a and 103b to the stop index position when the user visually recognized the diopter adjustment. This brings the diopter adjustment position closer to the stop index position with even greater precision, enabling the user to achieve optimal image adjustment.

[0094] Also in this embodiment, similarly to the modified example of the first embodiment, the diopter adjustment may be performed sequentially and independently for the right eye 2b and the left eye 2a of the user. In this case, even if there is a difference in visual acuity between the left and right eyes of the user, accurate diopter adjustment can be performed for each eye, and deviations in the diopter adjustment can be suppressed, making it possible to display clear images.

[0095] [Fourth embodiment] Next, a fourth embodiment of the present disclosure will be described. FIG. 15 is a schematic diagram showing the overall configuration of an image display device according to this embodiment, where (a) is an overall view of the device and (b) is a side view of the calibration controller 118. In FIG. 15, the same components as those in FIG. 1 are given the same reference numerals, and detailed explanations will be omitted. FIG. 16 is a flowchart showing a method for adjusting the diopter in the image display device according to this embodiment. FIG. 17 is a timing chart showing when the lever of the operation unit is operated in the calibration controller 118 in this embodiment. (a) shows the voltage, phase difference, pulse width, actuator speed, and position of the optical element including the stop position due to lever operation, and (b) shows an enlarged view of the voltage and position due to lever operation.

[0096] (Configuration of video display device) In the image display device according to this embodiment, a calibration controller 118 and an analog processing unit 119 are provided instead of the calibration controller 112 and analog processing unit 117 of the third embodiment shown in FIG. 12. The calibration controller 118 has an operation unit equipped with a so-called joystick-like lever that allows the user to give drive instructions to the movement drive means 12, instead of buttons SW2 and SW3, and outputs a wireless signal corresponding to the tilt of the lever. The analog processing unit 119 receives the wireless signal from the calibration controller 118 and performs analog processing on the output voltage of the received button SW1 and lever. In this embodiment, the calibration controller 118 and the analog processing unit 119 are electrically connected wirelessly, which further improves usability for the user compared to a wired connection.

[0097] (Method for adjusting visibility in image display device) A method for adjusting the visibility in the image display device according to this embodiment will be described below. To perform calibration according to this embodiment, the user starts the calibration operation by pressing button SW1 of calibration controller 112. At this time, image display means 11 displays images for calibration on image display sections 102a and 102b (F-01).

[0098] Next, the user starts tilting the lever of the operation unit (F-12). In this embodiment, instead of switching by pressing a button, the actuators of the diopter change drive units 104a and 104b are operated by tilting the lever. This causes the movement drive means 12 to drive the diopter change drive units 104a and 104b to adjust the diopter.

[0099] While the user is tilting the lever, the diopter change drive units 104a and 104b continue to be driven (F-13). The analog processing unit 119 detects the voltage when the lever is tilted as an analog voltage. Here, when the lever is tilted and the voltage is V0, the actuator is driven, and when the lever is not tilted and the voltage is Vd, the actuator is stopped.

[0100] While viewing the image on the image display means 11, the user searches for the position where the diopter is adjusted (the position where the image is in focus and easy to observe), and when the position where the image is easiest to observe is reached, the user releases the lever. As a result, an electrical signal serving as a stop command is sent from the movement drive means 12 to the diopter change drive units 104a and 104b. In this embodiment, the analog processing unit 117 determines that the lever has been released when the tilt of the lever begins to return to its original position and the voltage increases from V0 due to the lever release operation, the tilt of the lever becomes 0, and the voltage reaches Vd. The drive parameter storage units 115a and 115b store the detected position at the moment when the lever is released and the voltage changes from V0 to Vd due to the electrical signal from the calibration controller 118 as the release position of the lever (F-14).

[0101] In this embodiment, the time required for the stop operation is the time interval T from when the user releases the tilted lever until the lever returns to a non-tilted state. The position at the time when the lever release operation starts (the lever is removed from the user's hand) is set to stop position 4, which is the stop index position. Stop position 4 is shifted by a distance equivalent to the time interval T (stop operation equivalent distance) from the release position at the time when the lever is released (the lever tilt becomes 0). In this embodiment, the calculation unit 116 calculates the return amount α3, which is the stop operation equivalent distance, to determine stop position 4 (F-15). Information on the determined stop position 4 is stored in the drive parameter storage units 115a and 115b.

[0102] Specifically, when the time interval is T, the return amount α3 and the stop position 4 are expressed as follows: α3=V×N×K Stop position 4 = release position - α3 Here, V is the actuator drive speed at the lever release position (the drive speed when the lever tilt becomes 0), N is the speed coefficient, and K is the value obtained by multiplying the time interval T by a coefficient (constant).

[0103] Specifically, the F-15 executes as follows: FIG. 17(b) shows the cases where the time interval T is T3 (shown by a solid line in the figure) and T4 (shown by a dashed line in the figure). The release position of the lever at time interval T3 is detection position C, and the release position of the lever at time interval T4 is detection position D. In the third embodiment, the time required to press button SW3 (time interval T) varied depending on the user. In contrast, in this embodiment, the user only needs to release the lever in the stop operation, after which the lever automatically returns to a neutral position. Therefore, there is almost no variation in the time interval T (T3 ≈ T4), and the time interval T can be considered a constant. In this way, because the time interval T required for the stop operation is approximately constant regardless of the user, K in the above equation can be set to a fixed value.

[0104] In this embodiment, the time interval T required for the lever to return from a tilted state to a non-tilted state is a substantially constant value regardless of the user, so the stop position 4 can be determined by a relatively simple calculation.

[0105] Next, the movement driving means 12 reverses the actuators of the diopter change driving units 104a and 104b from stop position 1 where the stop command was received. Using the information on stop position 4 calculated and stored in F-15, the diopter change driving units 104a and 104b move and stop the optical elements 103a and 103b to stop position 4 so as to return the distance that the optical elements 103a and 103b overran (F-16).

[0106] In this manner, the diopters of the right eye 2b and the left eye 2a of the user are adjusted simultaneously in the image display device.

[0107] In this embodiment, the movement drive means 12 operates to return the overrunning optical elements 103a, 103b to stop position 4, which is the position at the time when the lever begins to be tilted (when the voltage begins to rise from V0). Because the stop index position is determined when the user releases the lever, there is almost no variation in the setting of the stop index position, and the optical elements 103a, 103b can be stopped at a position as close as possible to the position at which the user wants to stop them, enabling optimal image adjustment for the user.

[0108] As described above, according to this embodiment, an image display device that can suppress the occurrence of adjustment deviations in diopter adjustment and display clear images can be realized with a relatively simple configuration.

[0109] In this embodiment, too, taking into consideration the second embodiment, the delay in the user's operation from the time when the diopter adjusted state is visually recognized until the lever tilt operation is actually started may be taken into consideration. For example, in the above-mentioned adjustment method, a position further shifted by a distance equivalent to the delay time from stop position 4, which is the position at the time when the lever starts to be tilted, is set as the stop index position (= stop position 4 - return amount α1). Here, the return amount α1, which is the distance equivalent to the delay, is a value obtained by multiplying the drive speed V of the actuator at the time when the lever is tilted by a coefficient N determined from the drive frequency, phase difference, pulse width, etc., and the user's personal characteristics. In this case, in F-15, Stop index position = Stop position 4-α1 =Release position-α3-α1 Get.

[0110] Then, in F-16, the diopter change drive units 104a and 104b return the overrunning optical elements 103a and 103b to the stop index position when the user visually recognized the diopter adjustment. This brings the diopter adjustment position closer to the stop index position with even greater accuracy, enabling the user to achieve optimal image adjustment.

[0111] Also in this embodiment, similarly to the modified example of the first embodiment, the diopter adjustment may be performed sequentially and independently for the right eye 2b and the left eye 2a of the user. In this case, even if there is a difference in visual acuity between the left and right eyes of the user, accurate diopter adjustment can be performed for each eye, and deviations in the diopter adjustment can be suppressed, making it possible to display clear images.

[0112] The disclosure of the various embodiments and modifications includes the following configurations and methods. (Configuration 1) A video display unit; an optical element; a movement driving unit that changes the relative position of the image display unit and the optical element; It is equipped with the movement driving unit determines a stop indicator position in response to a timing of a stop operation, and sets the relative position with the stop indicator position as a target; Video display device. (Configuration 2) the movement driving unit returns the stop indicator position from a state where the movement driving unit has passed the stop indicator position to the stop indicator position, thereby setting the relative position. 2. The image display device according to claim 1. (Configuration 3) The movement drive unit is a storage unit that stores the stop index position; setting the relative position using the stop indicator position stored in the storage unit; 3. The image display device according to configuration 2. (Configuration 4) the movement driving unit sets the relative position as the stop index position by subtracting a delay distance corresponding to a delay in the start of the stop operation by the user from the position where the stop instruction from the user is received. 4. The image display device according to configuration 2 or 3. (Configuration 5) The delay distance is a value obtained by multiplying the speed at the position where the stop command was received by a predetermined coefficient. 5. The image display device according to configuration 4. (Configuration 6) The movement drive unit is The distance equivalent to the stop operation is obtained using the time interval during which the user performs the stop operation. a position obtained by subtracting the stop operation equivalent distance from the position where the stop instruction from the user is received is set as the stop indicator position, and the relative position is set. 4. The image display device according to configuration 2 or 3. (Configuration 7) The stop operation equivalent distance is a value obtained by multiplying the speed at the position where the stop instruction was received by a coefficient related to the speed, the time interval, and a coefficient related to the time. 7. The image display device according to configuration 6. (Configuration 8) The movement drive unit is The distance equivalent to the stop operation is obtained using the time interval during which the user performs the stop operation. a position obtained by subtracting the stop operation equivalent distance and a delay distance equivalent to a delay in the start of the stop operation by the user from the position where the stop instruction from the user is received, as the stop indicator position, and setting the relative position; 4. The image display device according to configuration 2 or 3. (Configuration 9) The movement drive unit is a stop operation equivalent distance is obtained using a release position when the operation unit completes the stop operation; a position obtained by subtracting the stop operation equivalent distance from the release position is set as the stop index position, and the relative position is set. 4. The image display device according to configuration 2 or 3. (Configuration 10) The stopping operation equivalent distance is: a value obtained by multiplying the velocity at the release position by a coefficient and a fixed value related to time; 10. The image display device according to configuration 9. (Configuration 11) The movement drive unit is a stop operation equivalent distance is obtained using a release position when the operation unit completes the stop operation; a position obtained by subtracting the stop operation equivalent distance and a delay distance equivalent to a delay in starting the stop operation by the user from the release position is set as the stop index position, and the relative position is set. 4. The image display device according to configuration 2 or 3. (Configuration 12) It has a left eye side adjustment mode and a right eye side adjustment mode, The movement drive unit is In the left eye-side adjustment mode, the relative position between the left eye-side image display unit and the left eye-side optical element is set for the left eye side of the user; In the right-eye-side adjustment mode, the relative position between the image display unit on the right eye side and the optical element on the right eye side is set for the right eye side of the user. 12. The image display device according to any one of configurations 1 to 11. (Configuration 13) The movement drive unit is an actuator that moves the image display unit and the optical element relatively; an operation unit by which a user gives a drive instruction to the actuator; It has 13. The image display device according to any one of configurations 1 to 12. (Configuration 14) The operation unit is electrically connectable to and separable from the actuator. 14. The image display device according to configuration 13. (Configuration 15) The operation unit and the actuator are electrically connected wirelessly. 14. The image display device according to configuration 13. (Configuration 16) the actuator is an ultrasonic motor; 16. The image display device according to any one of configurations 13 to 15. (Configuration 17) After the stopping operation, the actuator reverses the phase difference of the drive waveform to perform inverse driving. 17. The image display device according to any one of configurations 13 to 16. (Configuration 18) the actuator is disposed on the optical element and moves the optical element relative to the image display unit; 18. The image display device according to any one of configurations 13 to 17. (Method 1) A movement drive unit is used to change the relative position of the image display unit and the optical element. determining a stop index position in response to a timing when the movement drive unit is stopped, and setting the relative position with the stop index position as a target; A method for adjusting a video display device. [Explanation of symbols]

[0113] 2a:Left eye 2a:Right eye 11: Image display means 12: Movement driving means 100: Video acquisition unit 101: Display processing unit 102a, 102b: Video display unit 103a, 103b: Optical elements 104a, 104b: Diopter change drive unit 106: Diopter change instruction unit 108a, 108b: Drive units 112, 118: Calibration controller 113: Signal processing unit 114a, 114b: Position storage unit 115a, 115b: Drive parameter storage unit 116: Calculation unit 117, 119: Analog processing unit

Claims

1. A video display unit; an optical element; a movement driving unit that changes the relative position of the image display unit and the optical element; It is equipped with the movement driving unit determines a stop indicator position in response to a timing of a stop operation, and sets the relative position with the stop indicator position as a target; Video display device.

2. the movement driving unit returns the stop indicator position from a state where the movement driving unit has passed the stop indicator position to the stop indicator position, thereby setting the relative position.

2. The image display device according to claim 1.

3. The movement drive unit is a storage unit that stores the stop index position; setting the relative position using the stop indicator position stored in the storage unit; 3. The image display device according to claim 2.

4. the movement driving unit sets the relative position as the stop index position by subtracting a delay distance corresponding to a delay in the start of the stop operation by the user from the position where the stop instruction from the user is received.

3. The image display device according to claim 2.

5. The delay distance is a value obtained by multiplying the speed at the position where the stop command was received by a predetermined coefficient.

5. The image display device according to claim 4.

6. The movement drive unit is The distance equivalent to the stop operation is obtained using the time interval during which the user performs the stop operation. a position obtained by subtracting the stop operation equivalent distance from the position where the stop instruction from the user is received is set as the stop indicator position, and the relative position is set.

3. The image display device according to claim 2.

7. The stop operation equivalent distance is a value obtained by multiplying the speed at the position where the stop instruction was received by a coefficient related to the speed, the time interval, and a coefficient related to the time.

7. The image display device according to claim 6.

8. The movement drive unit is The distance equivalent to the stop operation is obtained using the time interval during which the user performs the stop operation. a position obtained by subtracting the stop operation equivalent distance and a delay distance equivalent to a delay in the start of the stop operation by the user from the position where the stop instruction from the user is received, as the stop indicator position, and setting the relative position; 3. The image display device according to claim 2.

9. The movement drive unit is a stop operation equivalent distance is obtained using a release position when the operation unit completes the stop operation; a position obtained by subtracting the stop operation equivalent distance from the release position is set as the stop index position, and the relative position is set.

3. The image display device according to claim 2.

10. The stopping operation equivalent distance is: a value obtained by multiplying the velocity at the release position by a coefficient and a fixed value related to time; 10. The image display device according to claim 9.

11. The movement drive unit is a stop operation equivalent distance is obtained using a release position when the operation unit completes the stop operation; a position obtained by subtracting the stop operation equivalent distance and a delay distance equivalent to a delay in starting the stop operation by the user from the release position is set as the stop index position, and the relative position is set.

3. The image display device according to claim 2.

12. It has a left eye side adjustment mode and a right eye side adjustment mode, The movement drive unit is In the left eye-side adjustment mode, the relative position between the left eye-side image display unit and the left eye-side optical element is set for the left eye side of the user; In the right-eye-side adjustment mode, the relative position between the image display unit on the right eye side and the optical element on the right eye side is set for the right eye side of the user.

2. The image display device according to claim 1.

13. The movement drive unit is an actuator that moves the image display unit and the optical element relatively; an operation unit by which a user gives a drive instruction to the actuator; It has 2. The image display device according to claim 1.

14. The operation unit is electrically connectable to and separable from the actuator. The image display device according to claim 13.

15. The operation unit and the actuator are electrically connected wirelessly. The image display device according to claim 13.

16. the actuator is an ultrasonic motor; The image display device according to claim 13.

17. After the stopping operation, the actuator reverses the phase difference of the drive waveform to perform inverse driving. The image display device according to claim 13.

18. the actuator is disposed on the optical element and moves the optical element relative to the image display unit; The image display device according to claim 13.

19. A movement drive unit is used to change the relative position of the image display unit and the optical element. determining a stop index position in response to a timing when the movement drive unit is stopped, and setting the relative position with the stop index position as a target; A method for adjusting a video display device.

Images